WO2009093520A1 - エアマイクロメータの計測ヘッド - Google Patents
エアマイクロメータの計測ヘッド Download PDFInfo
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- WO2009093520A1 WO2009093520A1 PCT/JP2009/050505 JP2009050505W WO2009093520A1 WO 2009093520 A1 WO2009093520 A1 WO 2009093520A1 JP 2009050505 W JP2009050505 W JP 2009050505W WO 2009093520 A1 WO2009093520 A1 WO 2009093520A1
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- measurement
- air
- supply path
- air supply
- head
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/18—Measuring arrangements characterised by the use of fluids for measuring angles or tapers; for testing the alignment of axes
- G01B13/19—Measuring arrangements characterised by the use of fluids for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
Definitions
- the present invention relates to a measurement head of an air micrometer.
- a long drilling tool is attached to the spindle of a machine tool, and holes such as crank holes and spool holes that require strict coaxiality are required for workpieces such as engine cylinder blocks and valve bodies.
- a bush is used to suppress runout of the drilling tool.
- the drilling tool is inserted into the bushing hole with the axis of the main shaft (that is, the axis of the drilling tool) aligned with the axis of the bushing hole (see FIG. 1A: details will be described later).
- the shaft center of the main shaft and the shaft center of the bush hole may be displaced (eccentric). If drilling is continued in such an eccentric state, the inner peripheral surface of the bush hole Will be unevenly worn. As a result, the bush does not function, and the coaxiality of the processed hole is deteriorated.
- FIG. 21A is a side view of the touch sensor
- FIG. 21B is a view in the direction of the arrow W in FIG.
- the touch sensor 1 is formed by projecting a stylus 3 at the tip of a measuring head 2.
- this measuring head 2 is mounted on the spindle 4 of the machine tool, and then the spindle 4 is operated to bring the stylus ball 3a at the tip of the stylus 3 into contact with the inner peripheral surface of the bush hole (not shown).
- the eccentric amount of the main shaft 4 and the bush hole is measured.
- the conventional touch sensor is a contact type sensor, it has the following problems.
- Measurement errors are likely to occur due to the biting of foreign matter such as cutting chips adhering to the inner peripheral surface of the bush hole.
- the stylus 3 Since the stylus 3 is easily broken and the spindle needs to be operated at a low speed in order to prevent the stylus 3 from being broken, it takes time for measurement.
- calibration with a dial gauge is necessary every time the measuring head 2 is replaced due to a failure of the stylus 3 or the like, it takes time to measure.
- FIG. 22A is a diagram showing an outline of a conventional air micrometer
- FIG. 22B is a diagram showing an outline of the air micrometer calibration apparatus.
- a measurement head 11 of a conventional air micrometer has a measurement head main body 14 and a measurement head front end 12 formed at the front end of the measurement head main body 14. Yes.
- a first measurement air nozzle 16A and a second measurement air nozzle 16B are formed in the measurement head distal end portion 12 in opposite directions along the radial direction of the measurement head distal end portion 12.
- a measurement air supply path 15 communicating with the first measurement air nozzle 16A and the second measurement air nozzle 16B is formed.
- the measurement head 11 (measurement head tip portion 12) is inserted into the hole 13a of the measurement target 13 as shown in the figure, and then the measurement air is measured from the measurement air supply source 17 via the A / D converter 18.
- the A / D converter 18 detects the pressure of the measurement air (corresponding to the flow rate of the measurement air), converts this detection signal into a digital signal, and outputs it to a control device (not shown).
- the flow rate of the measurement air is obtained from the pressure detection signal output from the A / D converter 18, and the relationship between the measurement air flow rate data and the preliminarily stored measurement air flow rate and hole diameter is obtained.
- the diameter D1 of the measured object hole 13a is obtained based on the data to be represented.
- data representing the relationship between the measured flow rate and the hole diameter is obtained in advance using an air micrometer calibration device (master gauge) 19 as shown in FIG. That is, as shown in the figure, after the measurement head 11 (measurement head tip 12) is inserted into the master hole 19a of the air micrometer calibration device 19 having a predetermined diameter D2, the measurement air is supplied from the air supply source 17 to the A The air is supplied to the air supply path 15 of the measurement head main body 14 via the / D converter 18. And after this measurement air distribute
- master gauge master gauge
- the A / D converter 18 detects the pressure of the measurement air at this time (corresponding to the flow rate of the measurement air), converts it into a digital signal, and outputs it to a control device (not shown).
- the control device the flow rate of the measurement air is obtained from the pressure detection signal output from the A / D converter 18.
- Such measurement is performed on two types of large and small master holes 19a having different diameters D2.
- the measurement air flow data measured at this time and the diameter D2 data input in advance are obtained. Is stored as data representing the relationship between the measurement air flow rate and the hole diameter.
- JP 2006-284376 A JP 58-1114835 A Japanese Patent Laid-Open No. 6-186209 JP-A-7-134018
- the measurement head 11 of the conventional air micrometer can only measure the hole diameter D1, and the outer peripheral surface 12a of the measurement head 12 and the inner peripheral surface of the measured object hole 13a as shown in FIG. It is impossible to measure the gaps ⁇ G1 and ⁇ G2 with respect to 13b. Therefore, even if this measuring head 11 is applied to the measurement of the bush hole as it is, it is only possible to measure the inner diameter of the bush hole, and between the outer peripheral surface 12a of the measuring head tip 12 and the inner peripheral surface of the bush hole. The gap cannot be measured. That is, the eccentricity of the main shaft and the bush hole cannot be measured.
- an object of the present invention is to provide an air micrometer measuring head capable of measuring the eccentricity of the main shaft and the bush hole.
- a measuring head of an air micrometer according to a first aspect of the present invention for solving the above-described problem is attached to a spindle of a machine tool at the time of measurement, and is inserted into a bush hole of a bush attached to a work table of the machine tool.
- An air micrometer measuring head for measuring the eccentricity of the spindle, A measurement head main body, and a measurement head front end provided at the front end of the measurement head main body and inserted into the bush hole during measurement; One or more for injecting measurement air to the gap between the outer peripheral surface and the inner peripheral surface of the bush hole from the outlet of the outer peripheral surface of the measurement head at the time of measurement While measurement air nozzles are formed, individual measurement air supply paths corresponding to the measurement air nozzles are formed in the measurement head main body, and each measurement air nozzle is supplied with an individual measurement air supply. The measurement air is supplied from the road.
- the air micrometer measuring head of the second invention is the air micrometer measuring head of the first invention.
- the measurement air nozzle is a first measurement air nozzle and a second measurement air nozzle that are formed along a radial direction of the measurement head tip and have an angle of 180 degrees with respect to the circumferential direction of the measurement head tip.
- the measurement air supply path includes a first measurement air supply path that supplies measurement air to the first measurement air nozzle, and a second measurement air supply path that supplies measurement air to the second measurement air nozzle. It is characterized by being.
- the measurement head of the air micrometer of the third invention is the measurement head of the air micrometer of the first invention
- the measurement air nozzles are formed along the radial direction of the measurement head tip and each has a first measurement air nozzle, a second measurement air nozzle, and a second measurement air nozzle having an angle of 90 degrees in the circumferential direction of the measurement head tip.
- 3 measurement air nozzles and 4th measurement air nozzles
- the measurement air supply path includes a first measurement air supply path that supplies measurement air to the first measurement air nozzle, and a second measurement air supply path that supplies measurement air to the second measurement air nozzle.
- the measurement head of the air micrometer of the fourth invention is the measurement head of the air micrometer of the first invention
- the measurement air nozzle is a first measurement air nozzle and a second measurement air nozzle that are formed along the radial direction of the measurement head tip and have an angle of 90 degrees with respect to the circumferential direction of the measurement head tip.
- the measurement air supply path includes a first measurement air supply path that supplies measurement air to the first measurement air nozzle, and a second measurement air supply path that supplies measurement air to the second measurement air nozzle. It is characterized by being.
- the measurement head of the air micrometer of the fifth invention is the measurement head of the air micrometer of the first invention,
- the measurement air nozzle is one measurement air nozzle formed along the radial direction of the measurement head tip.
- the measurement air supply path is a single measurement air supply path that supplies measurement air to the one measurement air nozzle.
- the measurement head of the air micrometer of the sixth invention is the measurement head of the air micrometer of the second invention, Measurement air is supplied from a first measurement air supply path and a second measurement air supply path formed in the support portion of the main shaft, and a first measurement air supply path of a rotary joint attached to the measurement head main body. And the second measurement air supply path, and the first measurement air supply path and the second measurement air supply path of the measurement head main body, respectively, Alternatively, the measurement air is supplied from the first measurement air supply path and the second measurement air supply path formed in the support portion of the main shaft, and the first measurement air supply path of the rotary joint mounted on the main shaft.
- the first measurement air supply path and the second measurement of the measurement head main body through the second measurement air supply path and the first measurement air supply path and the second measurement air supply path formed in the main shaft. It is characterized by being configured to be respectively supplied to the air supply path for use.
- the measurement head of the air micrometer of the seventh invention is the measurement head of the air micrometer of the fifth invention, Measurement air is supplied from the measurement air supply path formed in the support portion of the spindle to the measurement head main body via the measurement air supply path of the rotary joint attached to the measurement head main body. That it is configured to be supplied to the air supply path, Alternatively, the measurement air is supplied from a measurement air supply path formed on the support portion of the main shaft to a measurement air supply path of a rotary joint attached to the main shaft and a measurement air supply path formed on the main shaft. Thus, the measurement head main body is supplied to the measurement air supply path.
- the measurement head of the air micrometer of the eighth invention is the measurement head of the air micrometer of the third invention
- Measurement air is supplied from the first measurement air supply path, the second measurement air supply path, the third measurement air supply path, and the fourth measurement air supply path formed in the support portion of the spindle.
- the first measurement air supply path, the second measurement air supply path, the third measurement air supply path, and the fourth measurement air supply path of the main body are respectively supplied.
- the measurement head of the air micrometer of the ninth invention is the measurement head of the air micrometer of the third invention, Measurement air is supplied from a first measurement air supply path and a second measurement air supply path formed in the support portion of the main shaft, so that the first measurement air supply path and the second measurement air in the measurement head main body section. It is characterized by being configured to be supplied to each supply path.
- An air micrometer measuring head is the air micrometer measuring head according to any one of the first to ninth aspects of the invention.
- An air blow nozzle is formed at the tip of the measurement head to blow air blow air forward from the jet port of the tapered surface at the tip side periphery during measurement toward the inner peripheral surface of the bush hole.
- the measurement head main body is formed with an air blow air supply path for supplying air blow air to the air blow nozzle.
- the measurement head of the air micrometer of the eleventh aspect of the invention is the measurement head of the air micrometer of the tenth aspect of the invention, Air blow air is supplied from an air blow air supply path formed in a support portion of the main shaft directly or from an air blow air supply path of a rotary joint mounted on the main shaft and an air blow air supply path formed in the main shaft. It is characterized by being configured to be supplied to the air supply path for air blow of the measurement head main body part via the.
- An air micrometer measuring head is the air micrometer measuring head according to any one of the first to eleventh aspects of the invention.
- the measurement head main body includes a distal end side member to which the measurement head distal end is fixed, a proximal end member, an elastic member interposed between the distal end side member and the proximal end member, It has a flexible hose connecting a measurement air supply path formed in the distal end side member and a measurement air supply path formed in the proximal end side member.
- the measurement head of the air micrometer of the first aspect of the present invention is mounted on the spindle of the machine tool at the time of measurement, and is inserted into the bush hole of the bush attached to the work table of the machine tool.
- An air micrometer measuring head for measuring the amount of eccentricity comprising: a measuring head main body portion; and a measuring head front end portion provided at the front end of the measuring head main body portion and inserted into the bush hole at the time of measurement.
- the measurement head tip has one measurement air to be blown out into a gap between the outer peripheral surface of the measurement head tip and the inner peripheral surface of the bush hole at the time of measurement.
- the measurement head main body is formed with individual measurement air supply paths corresponding to each measurement air nozzle, Since the measurement air is supplied from the individual measurement air supply passages to the measurement air nozzles, not the inner diameter of the bush hole but the outer peripheral surface of the measurement head tip and the bush hole.
- the gap between the inner peripheral surface can be measured. Accordingly, the eccentric amount of the main shaft and the bush hole is obtained based on the measured value of the gap, and the position of the main shaft is controlled according to the eccentric amount (that is, the relative position of the main shaft and the bush hole is corrected), Uneven wear of the bush hole can be prevented by matching the axis of the main shaft (drilling tool) with the axis of the bush hole.
- the measurement air nozzle is formed along the radial direction of the tip of the measurement head and is mutually connected to the measurement head.
- a first measurement air nozzle and a second measurement air nozzle having an angle of 180 degrees in the circumferential direction of the tip portion, and the measurement air supply path supplies a measurement air to the first measurement air nozzle.
- the second measurement air supply path for supplying the measurement air to the second measurement air nozzle and the measurement head is rotated by 90 degrees by the main shaft instead of the inner diameter of the bush hole.
- the eccentric amount of the main shaft and the bush hole is obtained based on the measured value of the gap (for example, by calculation of the later-described equations (1) and (2)), and the position of the main shaft is controlled according to the eccentric amount.
- the measurement air nozzle is formed along the radial direction of the tip of the measurement head, and each of the measurement air nozzles is the measurement head.
- the gap between the outer peripheral surface of the measuring head tip and the inner peripheral surface of the bushing hole is not the inner diameter of the hole but on both sides of the first radial direction and the second radial direction perpendicular to the measuring head tip.
- the eccentric amount of the main shaft and the bush hole is obtained based on the measured value of the gap (for example, by calculation of the later-described equations (1) and (2)), and the position of the main shaft is controlled according to the eccentric amount.
- the measurement air nozzle is formed along the radial direction of the tip of the measurement head and is mutually connected to the measurement head.
- a first measurement air nozzle and a second measurement air nozzle having an angle of 90 degrees in the circumferential direction of the distal end portion, and the measurement air supply path supplies a measurement air to the first measurement air nozzle.
- a gap between the outer peripheral surface of the measurement head tip and the inner peripheral surface of the bush hole can be measured. Therefore, based on the measured value of this gap (for example, by subtracting the measured value of the gap from the gap value between the outer peripheral surface of the front end of the measuring head and the inner peripheral surface of the bush hole when not eccentric).
- the measurement air nozzle is one measurement formed along the radial direction of the tip of the measurement head. It is an air nozzle, and the measurement air supply path is one measurement air supply path for supplying measurement air to the one measurement air nozzle.
- the measurement air is supplied to the first measurement air supply path formed in the support portion of the main shaft and the second measurement air. From the measurement air supply path, the first measurement air supply of the measurement head main body through the first measurement air supply path and the second measurement air supply path of the rotary joint mounted on the measurement head main body. The first measurement air supply path and the second measurement air supply path formed in the support portion of the main shaft. From the first measurement air supply path and the second measurement air supply path of the rotary joint mounted on the main shaft, and the first measurement air supply path and the second measurement air supply path formed on the main shaft.
- the measuring head book Since the measurement air is supplied to the first measurement air supply path and the second measurement air supply path, the measurement air can be supplied from the support portion of the main shaft. Since it is not necessary to connect supply means such as a direct measurement air supply hose, it is possible to obtain effects such as easy measurement operations such as attachment / detachment of the measurement head to / from the spindle.
- the measurement air is supplied from the measurement air supply path formed in the support portion of the main shaft. It is configured to be supplied to the measurement air supply path of the measurement head main body part via the measurement air supply path of the rotary joint mounted on the main body part, or the measurement air is a support part of the main shaft. From the measurement air supply path formed on the main shaft, the measurement air of the measurement head main body is passed through the measurement air supply path of the rotary joint attached to the main shaft and the measurement air supply path formed on the main shaft.
- measurement air can be supplied from the support portion of the spindle, and a measurement air supply hose or the like can be directly supplied to the measurement head. It is not necessary to connect the unit, the effect of such measurement operations such as attachment and detachment of the measuring head to the main shaft is facilitated is obtained.
- the measurement air is supplied to the first measurement air supply path formed in the support portion of the main shaft and the second measurement air. From the measurement air supply path, the third measurement air supply path, and the fourth measurement air supply path, the first measurement air supply path, the second measurement air supply path, and the third measurement air of the measurement head main body.
- the measurement air can be supplied from the support portion of the spindle, and the measurement air supply directly to the measurement head Since there is no need to connect a supply means such as a hose, effects such as easy measurement operations such as attachment / detachment of the measurement head to / from the spindle can be obtained.
- the measurement air is supplied to the first measurement air supply path formed in the support portion of the main shaft and the second measurement air. Since the measurement air supply path is supplied to the first measurement air supply path and the second measurement air supply path of the measurement head main body, the measurement head supply section is used for measurement. Since air can be supplied and there is no need to connect a supply means such as a measurement air supply hose directly to the measurement head, measurement operations such as attaching and detaching the measurement head to and from the spindle are easy. can get.
- the tip of the measurement head has a taper surface at the peripheral edge of the tip side at the time of measurement.
- An air blow nozzle is formed for blowing air blow air forward from the blow-out opening toward the inner peripheral surface of the bushing hole, and the air for air blow is supplied to the air blow nozzle in the measurement head main body. Since the air supply path is formed, even if foreign matter such as cutting dust adheres to the inner peripheral surface of the bush hole, after removing the foreign matter from the inner peripheral surface of the bush hole by air blow, Since gap measurement can be performed, accurate gap measurement can be performed.
- the air blowing air is directly from the air blowing air supply path formed in the support portion of the main shaft, or
- the air blow air supply path of the rotary joint mounted on the main shaft and the air blow air supply path formed on the main shaft are supplied to the air blow air supply path of the measurement head main body. Because it features, air blow air can be supplied from the spindle support, and it is not necessary to connect a supply means such as an air blow air supply hose directly to the measurement head. It is possible to obtain effects such as easy measurement operation.
- the measurement head main body is a tip to which the measurement head tip is fixed.
- a side member, a base end side member, an elastic member interposed between the tip end side member and the base end side member, a measurement air supply path formed in the tip end side member, and the base end side It is characterized by having a flexible hose connected to the measurement air supply path formed in the member, so that the measurement head is inserted when inserting the tip of the measurement head into the bush hole. Even if the distal end portion contacts the bush, the elastic member expands or contracts and the distal end portion of the measurement head moves to the proximal end side, so that the impact at the time of contact is alleviated.
- FIG. 5A is a view taken in the direction of the arrow D in FIG.
- FIG. 5B is a diagram illustrating a state in which the measurement head is rotated 90 degrees from the state of FIG. It is explanatory drawing of the data showing the relationship between the measurement air flow volume and a gap.
- (A) is a sectional view of an air micrometer calibration device (master gauge) used for calibration of the measurement head
- (b) is a view taken in the direction of arrow E in (a)
- (c) is an FF in (a).
- FIG. (A) is a figure which shows a mode that the said measurement head is calibrated using the said calibration apparatus for air micrometer
- (b) is a G direction arrow directional view of (a). It is a side view of the measurement head of the air micrometer which concerns on Example 2 of this invention.
- FIG. 10E is a sectional view taken along line JJ
- FIG. 9E is a sectional view taken along line KK in FIG. 9
- FIG. 10F is a sectional view taken along line LL in FIG.
- It is a system block diagram of the said air micrometer. It is a M direction arrow line view of FIG. It is a figure which shows a mode that the said measurement head is calibrated using the calibration apparatus for air micrometers (similar figure to FIG.8 (b)).
- FIG. 6 is a diagram (similar to FIG. 5) illustrating how the gap is measured by the measurement head. It is a figure which shows a mode that the said measurement head is calibrated using the calibration apparatus for air micrometers (similar figure to FIG.8 (b)).
- FIG. 4D is a cross-sectional view taken along the line arrow, and FIG.
- FIG. 5 is a diagram similar to FIG. It is a figure which shows a mode that the said measurement head is calibrated using the calibration apparatus for air micrometers (similar figure to FIG.8 (b)).
- (A) is a side view of a touch sensor,
- (b) is a W direction arrow view of (a).
- (A) is a figure which shows the outline
- (b) is a figure which shows the outline
- FIG. 1A is a view showing an example of a machine tool to which a measurement head of an air micrometer according to Embodiment 1 of the present invention is applied
- FIG. 1B is a diagram illustrating the measurement head as a main axis of the machine tool. It is a principal part enlarged view which shows the state mounted
- 2 is a partially cutaway side view of the measuring head
- FIG. 3A is a cross-sectional view showing a part of the measuring head
- FIG. 3B is a view in the direction of arrow A in FIG. 3C is a cross-sectional view taken along line BB in FIG. 2
- FIG. 3D is a cross-sectional view taken along line CC in FIG. 2, FIG.
- FIG. 4 is a system configuration diagram of the air micrometer, and FIG. 4A is a view taken in the direction of arrow D in FIG. 4, FIG. 5B is a view showing a state in which the measuring head is rotated 90 degrees from the state shown in FIG. 5A, and FIG. It is explanatory drawing of the data showing these relationships.
- FIG. 7A is a cross-sectional view of an air micrometer calibration device (master gauge) used for calibration of the measurement head
- FIG. 7B is a view taken in the direction of the arrow E in FIG.
- FIG. 8C is a cross-sectional view taken along line FF in FIG. 7A
- FIG. 8A is a diagram showing how the measurement head is calibrated using the air micrometer calibration device
- FIG. These are the G direction arrow directional views of Drawing 8 (a).
- 1A includes a bed 22, a work table 23 provided on the bed 22, a column 24, a spindle head 25, a spindle 26, and a bush attachment 27.
- the column 24 is movable along a rail 28 provided on the upper surface of the bed 22 in a direction (X-axis direction) orthogonal to the paper surface of FIG. 1A, and the work table 23 is provided on the upper surface of the bed 22. It is possible to move in the left-right direction (Z-axis direction) in FIG.
- a spindle head 25 that is a support portion of the spindle 26 is movable in the vertical direction (Y-axis direction) along a rail 30 provided on the front surface of the column 24.
- the machine tool in the illustrated example is of a horizontal type, and the main shaft 26 is provided in the main shaft head 25 with the axial direction horizontal, and is rotatably supported by the main shaft head 25.
- the column 24, the work table 23, and the spindle head 26 are driven by driving mechanisms of respective axes such as a feed screw mechanism (not shown) so as to move linearly in the X axis direction, the Z axis direction, and the Y axis direction. It has become.
- the main shaft 26 is rotationally driven by a main shaft motor (not shown).
- the bush fixture 27 has a horizontal portion 27 a and a vertical portion 27 b and is fixed on the work table 23.
- a workpiece W such as an engine cylinder block or a valve body is placed on the horizontal portion 27 a of the bush fixture 27 and fixed by fixing means such as hydraulic pressure.
- a bush 31 is attached to the vertical portion of the bush fixture 27. ing.
- the bush 31 is a cylindrical member having a bush hole 31a having a circular cross section at the center.
- a long drilling tool 32 is attached to the main shaft 26.
- the drilling tool 32 is inserted into the bushing hole 31a and the swinging of the bushing tool 31 is suppressed by the bushing 31 and is rotated by the main shaft 26, so that a hole 33 such as a crank hole or a spool hole having a high coaxiality requirement is formed. Processing.
- the eccentric amounts of the main shaft 26 and the bush hole 31a are periodically measured.
- the measurement head 41 of the air micrometer is mounted on the main shaft 26 instead of the drilling tool 32, and then inserted into the bush hole 31a to measure the gap (main shaft 26). And measurement of the eccentric amount of the bush hole 31a) (details will be described later).
- the gap measurement in this case is not limited to the bush 31 actually used for drilling, but as shown by a one-dot chain line in FIG. It may be provided in the vicinity of the bush 31 dedicated to the gap measurement.
- the measurement head 41 of the air micrometer has a cylindrical measurement head main body 42 and the measurement head main body 42. And a columnar measuring head distal end portion 43 provided at the distal end.
- the distal end of the measurement head main body 42 is a connection portion 45 (front end side member) integral with the measurement head distal end portion 43, and the spigot fitting portion 48 of the connection portion 45 is attached to the case 46 of the measurement head main body portion 42. It is mated.
- a plurality of elongated holes (recesses) 58 are formed on the outer peripheral surface of the case 46, and the connecting portion 45 is screwed to the case 46 with screws 47 inserted from these elongated holes 58.
- the distal end side periphery of the measurement head distal end portion 43 is a tapered surface 49
- the proximal end side periphery of the measurement head distal end portion 43 is also a tapered surface 50.
- the taper surface 49 is inclined inward in the radial direction of the measurement head distal end portion 43 toward the distal end side of the measurement head distal end portion 43
- the taper surface 50 is inclined toward the proximal end side of the measurement head distal end portion 43.
- the portion 43 is inclined inward in the radial direction.
- the measurement head tip 43 is formed with two measurement air nozzles 51A, 51B and four air blow nozzles 52A, 52B, 52C, 52D.
- the first measurement air nozzle 51A and the second measurement air nozzle 51B are formed along the radial direction of the measurement head tip portion 43 and have an angle of 180 degrees with respect to the circumferential direction of the measurement head tip portion 43. This is for ejecting from the outlets 51A-1 and 51B-1 on the outer peripheral surface 43a of the measurement head tip 43 to the gap between the outer peripheral surface 43a and the inner peripheral surface 31b of the bush hole 31a.
- the air blow nozzles 52A, 52B, 52C, and 52D each have an angle of 90 degrees in the circumferential direction of the measurement head distal end portion 43, and the ejection ports 52A-1, 52B-1, and 52C- of the tapered surface 49 on the distal end side.
- connection portion 45 includes a first measurement air supply path 53A connected to the first measurement air nozzle 51A, a second measurement air supply path 53B connected to the second measurement air nozzle 51B, and an air blower.
- An air blowing air supply path 56 connected to the nozzles 52A, 52B, 52C, 52D is formed.
- the measurement head main body 42 has a case 46 as a distal end side member and a proximal end side member 54 in addition to the connection portion 45 described above.
- the case 46 is a cylindrical member, and a first measurement air supply path 55A and a second measurement air supply path 55B are formed in the plate thickness portion.
- the first measurement air supply path 55A is connected to the first measurement air supply path 53A, and the second measurement air supply path 55B is connected to the second measurement air supply path 53B.
- the proximal end side member 54 is configured to include a distal end portion 61 and a proximal end portion 59 having a diameter larger than that of the shaft portion 60 on the distal end side and the proximal end side of the shaft portion 60.
- the distal end portion 62 is disposed in the case 46 and is slidable in the axial direction in contact with the inner peripheral surface 46 a of the case 46.
- the shaft portion 60 is inserted into the hole 62 a of the proximal end plate 62 of the case 46. It is inserted and is movable in the axial direction.
- a coil spring 74 as an elastic member is interposed between the distal end portion 62 and the connection portion 45 (inlay portion 48).
- the coil spring 74 always pushes the measurement head tip portion 43 (connection portion 45) forward. Therefore, even if the measuring head tip 43 contacts the bush 31 when the measuring head tip 43 is inserted into the bushing hole 31a, the coil spring 74 contracts and the measuring head as shown by a one-dot chain line in FIG. Since the distal end portion 43 moves to the proximal end side together with the case 46, the impact at the time of contact is reduced.
- a first measurement air supply path 63A and a second measurement air supply path 63B are formed in the base end side member 54.
- a flexible first hose 64 ⁇ / b> A and a second hose 64 ⁇ / b> B are wound around the outer peripheral surface of the shaft portion 60, and the first hose 64 ⁇ / b> A is a first measurement air supply path 55 ⁇ / b> A and a base end side member 54 on the case 46 side.
- the first measurement air supply path 63A on the side is connected, and the second hose 64B connects the second measurement air supply path 55B on the case 46 side and the second measurement air supply path 63A on the base end side member 54 side. It is out.
- the measurement air is supplied to the first measurement air nozzle 51A via the first measurement air supply path 63A, the first hose 64A, the first measurement air supply path 55A, and the first measurement air supply path 53A.
- the measurement air is supplied to the second measurement air nozzle 51B via the second measurement air supply path 63B, the second hose 64B, the second measurement air supply path 55B, and the second measurement air supply path 53B. .
- an air blow air supply path 65 is formed in the base end side member 54 (the front end portion 61, the shaft portion 60, and the base end portion 59). Therefore, the air blow nozzles 52A, 52B, 52C, 52D include the air blow air supply path 65, the space portion 66 between the tip 61 in the case 46 and the connecting portion 45 (the spigot fitting portion 48), and the air blow air. Air blow air is supplied through the supply path 56.
- a rotary joint 67 is mounted on the outer peripheral surface of the base end side member 54, and the measuring head 41 can be attached to and detached from the main shaft 26 at the base end of the base end side member 54 in the same manner as the drilling tool 32.
- a detachable portion 68 having a simple structure is provided.
- the first measurement air supply path 68A of the rotary joint 67 is connected to the first measurement air supply path 70A formed in the spindle head 25 via the first coupler 69A, and the second measurement of the rotary joint 67 is performed.
- the air supply path 68B is connected to the second measurement air supply path 70B formed in the spindle head 25 via the second coupler 69B. Accordingly, the measurement air is supplied from the first measurement air supply path 70A of the spindle head 25 to the first measurement air supply path 63A of the base end side member 54 via the first measurement air supply path 68A of the rotary joint 67.
- a rotary joint 71 is attached to the main shaft 26, and an air blow air supply path 72 of the rotary joint 71 is connected to an air blow air supply path 73 formed in the main spindle head 25. Accordingly, the air blowing air supply path 65 of the base end side member 54 is supplied from the air blowing air supply path 73 of the spindle head 25 to the air blowing air supply path 72 of the rotary joint 71 and the air blowing air supply formed in the spindle 26. Air blow air is supplied through the path 75.
- the measuring head 41 When measuring the gap, first, the measuring head 41 is mounted on the main shaft 26 in place of the drilling tool 32, and the measuring head 41 is moved to the inlet of the bushing hole 31a.
- the air blowing air is supplied to 43 air blowing nozzles 52A, 52B, 52C and 52D (air blowing air supply passage 73 of the spindle head 25).
- the air blowing air is jetted from the air blowing nozzles 52A, 52B, 52C, 52D toward the inner peripheral surface 31b of the bush hole 31a. For this reason, when foreign matters such as cutting dust adhere to the inner peripheral surface 31b, the foreign matters are blown away by air blowing air and removed from the inner peripheral surface 31b.
- the measurement head tip 43 is inserted into the bush hole 31a, a measurement command is output from the NC device 78 to the sequencer 80, and a measurement direction selection command and a measurement start command are transmitted from the sequencer 80 to the control device 81.
- a measurement command is output from the NC device 78 to the sequencer 80
- a measurement direction selection command and a measurement start command are transmitted from the sequencer 80 to the control device 81.
- Is output to the control device 81 of the air micrometer control of the A / D converters 77A and 77B and the air supply sources 76A and 76B by the control device 81 is started, and the gap measurement in the Y-axis direction and the X-axis are started.
- Directional gap measurement is performed. These gap measurements may start from either the Y-axis direction or the X-axis direction.
- the gap measurement in the Y-axis direction is performed as shown in FIG. 5A, and then shown in FIG. 5B.
- the measurement head 41 (measurement air 3) is rotated 90 degrees by the control of the main shaft 26 by the NC device 78, and the gap measurement in the X-axis direction is performed.
- the measurement air adjusted to a constant pressure by a pressure adjusting means such as a regulator from each of the first measurement air supply source 76A and the second measurement air supply source 76B.
- the first measurement air nozzle 51A (the first measurement air supply path 70A of the spindle head 25) and the second measurement are measured via the first A / D converter 77A and the second A / D converter 77B.
- To the air nozzle 51B (second measurement air supply path 70B of the spindle head 25).
- these measurement air flows from the first measurement air nozzle 51A and the second measurement air nozzle 51B to the gap ⁇ Y1, between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 31b of the bush hole 31a. It is ejected to ⁇ Y2.
- the first A / D converter 77A and the second A / D converter 77B detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. And output to the control device 81.
- the flow rate of the measurement air is obtained from the pressure detection signals output from the first A / D converter 77A and the second A / D converter 77B, and data of the measurement air flow rate are stored in advance.
- the gap ⁇ Y1 and the gap ⁇ Y2 are obtained on the basis of data representing the relationship between the measurement air flow rate and the gap as exemplified in FIG.
- the control device 81 calculates the eccentric amount ⁇ Y between the main shaft 26 (drilling tool 32) and the bush hole 31a in the Y-axis direction by the following equation (1) based on the measured values of these gaps ⁇ Y1, ⁇ Y2,
- the eccentricity ⁇ Y is output to the sequencer 80.
- ⁇ Y ( ⁇ Y1 ⁇ Y2) ⁇ 2 (1)
- each of the first measurement air supply source 76A and the second measurement air supply source 76B is adjusted by a pressure adjusting means such as a regulator.
- the measurement air adjusted to a constant pressure is passed through the first A / D converter 77A and the second A / D converter 77B, and the first measurement air nozzle 51A (first measurement of the spindle head 25) at the distal end portion 43 of the measurement head.
- Air supply path 70A) and the second measurement air nozzle 51B (second measurement air supply path 70B of the spindle head 25).
- the measurement air is changed from the first measurement air nozzle 51A and the second measurement air nozzle 51B to the gap ⁇ X1, between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 31b of the bush hole 31a. It is ejected to ⁇ X2.
- the first A / D converter 77A and the second A / D converter 77B detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. And output to the control device 81.
- the flow rate of the measurement air is obtained from the pressure detection signals output from the first A / D converter 77A and the second A / D converter 77B, and data of the measurement air flow rate are stored in advance.
- the gap ⁇ X1 and the gap ⁇ X2 are obtained based on data representing the relationship between the measurement air flow rate and the gap as exemplified in FIG.
- the control device 81 calculates the eccentric amount ⁇ X between the main shaft 26 (drilling tool 32) and the bush hole 31a in the X-axis direction by the following equation (2) based on the measured values of the gaps ⁇ X1 and ⁇ X2,
- the eccentricity ⁇ X is output to the sequencer 80.
- ⁇ X ( ⁇ X1 ⁇ X2) ⁇ 2 (2)
- the sequencer 80 stores the eccentricity amounts ⁇ X and ⁇ Y input from the control device 81 in macro variables of the NC device 78.
- the position of the main shaft 26 is controlled by shifting the X and Y coordinates in accordance with the eccentric amounts ⁇ X and ⁇ Y (that is, the relative position between the main shaft 26 and the bush hole 31a is corrected).
- the shaft core of the main shaft 26 (drilling tool 32) and the shaft core of the bush hole 31a are aligned to prevent uneven wear of the bush hole 31a.
- Data representing the relationship between the measurement air flow rate and the gap as illustrated in FIG. 6 is obtained by using an air micrometer calibration device (master gauge) 91 as shown in FIGS. 7 (a) to 7 (c). Obtained by performing calibration.
- the air micrometer calibration device 91 is stored in the storage hole 92.
- the storage place (place where the storage hole 92 is provided) of the air micrometer calibration device 91 is arbitrary, and may be, for example, the bush fixture 27 or the vicinity thereof, or the tool storage part or the vicinity thereof.
- the air micrometer calibration device 91 has a clamping sleeve 93 provided in the middle of the measurement head entry hole 94, a small diameter master hole (small) 95, and a large diameter master hole (large) 96. ing.
- the small diameter master hole 95 has a diameter D1
- the large diameter master hole 96 has a diameter D2 larger than D1.
- the clamping sleeve 93, the small-diameter master hole 95, and the large-diameter master hole 96 are arranged in series, and the shaft core of the clamping sleeve 93, the shaft core of the small-diameter master hole 95, and the large-diameter master hole.
- the 96 cores coincide.
- the clamping sleeve 93 is formed in a thin cylindrical shape with a metal material or the like.
- the air micrometer calibration device 91 is formed with a cylindrical hydraulic chamber 97 surrounding the clamping sleeve 93 and a pressure oil supply path 98 connected to the hydraulic chamber 97.
- the pressure oil supply passage 98, the hydraulic chamber 97, and the clamping sleeve 93 constitute positioning means.
- a flexible hose 99 is connected to the pressure oil supply path 98.
- the air micrometer calibration device 91 is in a floating state. That is, the air micrometer calibration device 91 is not provided around the air micrometer calibration device 91 to prevent the master holes 95 and 96 from moving in the radial direction (arrow T direction). It is possible to move freely in the radial direction (arrow T direction) within 92.
- the measurement head 41 is moved to the inlet of the air micrometer calibration device 91 (measurement head entry hole 94), and then from the air blow air supply source 79, the air blow nozzles 52A and 52B of the measurement head tip portion 43. , 52C, 52D (air blowing air supply passage 73 of the spindle head 25) is supplied. As a result, this air blowing air is jetted toward the inner peripheral surface 93 a of the clamping sleeve 93, the inner peripheral surface 95 a of the small diameter master hole 95, and the inner peripheral surface 96 a of the large diameter master hole 96.
- the measurement head tip portion 43 is inserted into the small diameter master hole 95.
- the measuring head main body 42 (case 46) is positioned in the clamping sleeve 93.
- a pressure oil supply source (not shown) is supplied to the hydraulic chamber 97 via the hose 99 and the pressure oil supply path 98, the hydraulic pressure in the hydraulic chamber 97 acts on the entire clamping sleeve 93 as indicated by an arrow U,
- the clamping sleeve 93 clamps the measuring head main body 42 (case 46).
- the axis of the measurement head tip 43 and the axis of the small diameter master hole 95 coincide. That is, as shown in FIG. 8B, the gap ⁇ G1 between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 95a of the small-diameter master hole 95 is constant over the entire circumferential direction of the measurement head tip 43. (Predetermined value).
- the measurement air adjusted to a constant pressure by the pressure adjusting means such as a regulator from each of the first measurement air supply source 76A and the second measurement air supply source 76B Via the D converter 77A and the second A / D converter 77B, the first measurement air nozzle 51A (first measurement air supply path 70A of the spindle head 25) and the second measurement air nozzle 51B ( Supplied to the second measurement air supply path 70B) of the spindle head 25.
- the pressure adjusting means such as a regulator from each of the first measurement air supply source 76A and the second measurement air supply source 76B Via the D converter 77A and the second A / D converter 77B, the first measurement air nozzle 51A (first measurement air supply path 70A of the spindle head 25) and the second measurement air nozzle 51B ( Supplied to the second measurement air supply path 70B) of the spindle head 25.
- the first A / D converter 77A and the second A / D converter 77B detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. Output to the control device 81.
- control device 81 obtains the measurement air flow rate Q1 from the pressure detection signals output from the first A / D converter 77A and the second A / D converter 77B, and inputs the data of the measurement air flow rate Q1 in advance.
- the data of the gap ⁇ G1 is stored as data of the point P1 representing the relationship between the measurement air flow rate Q1 and the gap ⁇ G1 as shown in FIG.
- the axis of the measurement head tip 43 and the axis of the large diameter master hole 96 coincide. That is, as shown in FIG. 8B, the gap ⁇ G2 between the outer peripheral surface 43a of the measuring head tip 43 and the inner peripheral surface 96a of the large-diameter master hole 96 is the entire circumferential direction of the measuring head tip 43. Constant (predetermined value).
- the measurement air adjusted to a constant pressure by the pressure adjustment means is supplied from each of the first measurement air supply source 76A and the second measurement air supply source 76B.
- the first measurement air nozzle 51A (the first measurement air supply path 70A of the spindle head 25) and the second measurement are measured via the first A / D converter 77A and the second A / D converter 77B.
- these measurement air flows from the first measurement air nozzle 51A and the second measurement air nozzle 51B between the outer peripheral surface 43a of the measurement head tip portion 43 and the inner peripheral surface 96a of the large-diameter master hole 96. It is ejected into the gap ⁇ G2.
- the first A / D converter 77A and the second A / D converter 77B detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. Output to the control device 81.
- the control device 81 obtains the measurement air flow rate Q2 from the pressure detection signals output from the first A / D converter 77A and the second A / D converter 77B, and inputs the data of the measurement air flow rate Q2 in advance.
- the data of the gap ⁇ G2 is stored as data of the point P2 representing the relationship between the measurement air flow rate Q2 and the gap ⁇ G2 as shown in FIG.
- the data between this point P2 and the aforementioned point P1 is obtained by linear interpolation.
- the measurement range of the air micrometer needs to be a range in which the change in the measurement air flow rate is proportional to the change in the gap as shown by the solid line in FIG.
- the measurement head 41 is inserted into the bush hole 31a of the bush 31 attached to the spindle 26 of the machine tool 21 during measurement and attached to the work table 23 of the machine tool 21.
- the measurement head tip portion 43 is inserted into the bushing hole 31a, and the measurement head tip portion 43 has the outer peripheral surface 43a from the ejection ports 51A-1 and 51B-1 of the outer peripheral surface 43a of the measurement head tip portion 43 at the time of measurement.
- the first measurement air nozzle 51B and the second measurement air nozzle 51B for injecting the measurement air into the gap between the bush hole 31a and the inner peripheral surface 31b of the bush hole 31a.
- the measurement head tip portion 43 is formed along the radial direction of the measurement head tip portion 43 so as to have an angle of 180 degrees with respect to the circumferential direction of the measurement head tip portion 43.
- 51B corresponding to individual measurement air supply paths (that is, a first measurement air supply path 53A, 55A, 63A and a hose 64A, a first measurement air supply path 53B, 55B, 63B and a hose 64B).
- the measurement air is supplied to the measurement air nozzles 51A and 51B from the individual measurement air supply paths.
- the measurement head 41 is rotated by 90 degrees with the main shaft 26 instead of the inner diameter of the measurement head, whereby the first radial direction (the X axis) Gaps ⁇ X1, ⁇ X2 and ⁇ Y1, ⁇ Y2 between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 31b of the bush hole 31a on both sides of the second radial direction (Y-axis direction). It can be measured. Therefore, based on the measured values of the gaps ⁇ X1, ⁇ X2 and ⁇ Y1, ⁇ Y2 (by calculation of the above formulas (1) and (2)), the eccentric amounts ⁇ X, ⁇ Y of the main shaft 26 and the bush hole 31a are obtained, and this eccentricity is obtained.
- the measurement air is supplied from the first measurement air supply path 70A and the second measurement air supply path 70A formed in the spindle head 25.
- the first measurement air supply path 63A of the measurement head main body 42 and the first measurement air supply path 68A of the rotary joint 67 attached to the measurement head main body 42 via the first measurement air supply path 68B and the second measurement air supply path 68B Since it is characterized in that it is configured to be supplied to each of the second measurement air supply paths 63B, measurement air can be supplied from the spindle head 25, a measurement air supply hose directly to the measurement head 41, etc. Since there is no need to connect the supply means, it is possible to obtain effects such as easy measurement operations such as attachment / detachment of the measurement head 41 to / from the main shaft 26.
- the measurement head tip 43 has a front side from the ejection ports 52A-1 to 52D-1 of the tapered surface 49 at the tip side periphery at the time of measurement.
- Air blow nozzles 52A to 52D for blowing air blow air toward the inner peripheral surface 31b of the bushing hole 31a are formed, and the air blow air is supplied to the air blow nozzles 52A to 52D to the measurement head main body 42. Since air supply paths 56 and 65 for air blow are formed, even if foreign matter such as cutting dust adheres to the inner peripheral surface 31b of the bush hole 31a, the inner peripheral surface 31b of the bush hole 31a is formed by air blow. Since the gap can be measured after removing the foreign matter from the surface, accurate gap measurement can be performed.
- air blowing air is supplied from the air blowing air supply path 73 formed in the spindle head 25 to the rotary joint 71 attached to the spindle 26. Since the air blow air supply passage 72 and the air blow air supply passage 75 formed in the main shaft 26 are supplied to the air blow air supply passage 65 of the measuring head main body 42, the main shaft is used. Since air blow air can be supplied from the head 25 and there is no need to connect a supply means such as an air blow air supply hose directly to the measurement head 41, measurement operations such as attachment / detachment of the measurement head 41 to / from the spindle 26 are possible. Can be obtained.
- the measurement head main body portion 42 includes a tip side member (connection portion 45, case 46) to which the measurement head tip portion 43 is fixed, and A proximal end member 54, a coil spring 74 interposed between the distal end side member (connecting portion 45, case 46) and the proximal end side member 54, and a measurement formed on the distal end side member (case 46) It is characterized by having flexible hoses 64A, 64B connecting the air supply paths 55A, 55B and the measurement air supply paths 63A, 63B formed in the base end side member 54.
- FIG. 10A is a cross-sectional view showing a part of the measurement head
- FIG. 10C is a cross-sectional view taken along the line II of FIG. 9
- FIG. 10D is a cross-sectional view taken along the line JJ of FIG. 9
- FIG. 10F is a cross-sectional view taken along the line LL in FIG. 9
- FIG. 11 is a system configuration diagram of the air micrometer
- FIG. 12 is a view taken along the direction M in FIG.
- FIG. 13 is a diagram (similar to FIG. 8B) showing how the measurement head is calibrated using an air micrometer calibration device.
- the example of the machine tool to which the measurement head of the second embodiment is applied and the mounting state to the spindle are the same as those in FIGS. 1A and 1B, and the illustration and detailed description here. Is omitted.
- the air micrometer calibration device 91 described in the first embodiment is applied to the calibration of the measuring head in the second embodiment (see FIGS. 7 and 8). Therefore, the detailed description about the calibration apparatus for air micrometer here is abbreviate
- the measurement head 41 of the first embodiment two measurement air nozzles 51A and 51B are formed at the measurement head tip portion 43 (see FIGS. 2 and 3), FIG. 10B and FIG.
- the measurement head 41 according to the second embodiment is characterized in that four measurement air nozzles 51A, 51B, 51C, 51D are formed at the measurement head tip 43, and the others.
- the configuration is substantially the same as that of the first embodiment. Therefore, in the measurement head 41 of the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- four measurement air nozzles 51A, 51B, 51C, 51D are provided at the measurement head tip portion 43 of the measurement head 41 of the second embodiment. Is formed. These measurement air nozzles 51A to 51D each have an angle of 90 degrees in the circumferential direction of the measurement head tip portion 43, and the ejection ports 51A-1, 51B- of the outer peripheral surface 43a of the measurement head tip portion 43 during measurement. 1, 51C-1 and 51D-1 for jetting into the gap between the outer peripheral surface 43a and the inner peripheral surface 31b of the bush hole 31a.
- connection 45 of the measurement head main body 42 has a first measurement air supply path 53A connected to the first measurement air nozzle 51A and a second measurement air supply connected to the second measurement air nozzle 51B.
- a path 53B, a third measurement air supply path 53C connected to the third measurement air nozzle 51C, and a fourth measurement air supply path 53D connected to the fourth measurement air nozzle 51D are formed.
- the first measurement air supply path 55A, the second measurement air supply path 55B, the third measurement air supply path 55C, and the fourth measurement air supply path 55D Is formed.
- the first measurement air supply path 55A is connected to the first measurement air supply path 53A
- the second measurement air supply path 55B is connected to the second measurement air supply path 53B, and is used for the third measurement.
- the air supply path 55C is connected to the aforementioned third measurement air supply path 53C
- the fourth measurement air supply path 55D is connected to the aforementioned fourth measurement air supply path 53D.
- the proximal end side member 54 includes a first measurement air supply path 63A, a second measurement air supply path 63B, a first measurement air supply path 63A, a second measurement air supply path 63B, and a third measurement air supply.
- a path 63C and a fourth measurement air supply path 63D are formed.
- a flexible first hose 64A, second hose 64B, third hose 64C, and fourth hose 64D are wound around the outer peripheral surface of the shaft portion 60.
- the first hose 64A is used for the first measurement on the case 46 side.
- the air supply path 55A is connected to the first measurement air supply path 63A on the base end side member 54 side
- the second hose 64B is connected to the second measurement air supply path 55B on the case 46 side and the first end of the base end side member 54 side.
- the third measurement air supply path 63A is connected to the third measurement air supply path 55C on the case 46 side and the third measurement air supply path 63C on the base end side member 54 side
- the fourth hose 64C is connected to the fourth measurement air supply path 63A.
- the hose 64D connects the fourth measurement air supply path 55D on the case 46 side and the fourth measurement air supply path 63D on the base end side member 54 side.
- the measurement air is supplied to the first measurement air nozzle 51A via the first measurement air supply path 63A, the first hose 64A, the first measurement air supply path 55A, and the first measurement air supply path 53A.
- the measurement air is supplied to the second measurement air nozzle 51B via the second measurement air supply path 63B, the second hose 64B, the second measurement air supply path 55B, and the second measurement air supply path 53B.
- Measurement air is supplied to the third measurement air nozzle 51C via the third measurement air supply path 63C, the third hose 64C, the third measurement air supply path 55C, and the third measurement air supply path 53C.
- the measurement air is supplied to the fourth measurement air nozzle 51D via the fourth measurement air supply path 63D, the fourth hose 64D, the fourth measurement air supply path 55D, and the fourth measurement air supply path 53D.
- a rotary joint is not attached to the base end side member 54, and the first measurement air supply path 63A of the base end side member 54 is connected to the spindle head 25 via the first coupler 69A.
- the second measurement air supply path 63B is connected to the second measurement air supply path 70B of the spindle head 25 via the second coupler 69B, and further the third measurement air supply path
- the supply path 63C is connected to a third measurement air supply path (not shown) of the spindle head 25 via a third coupler (not shown), and the fourth measurement air supply path 63D is connected to a fourth coupler (not shown). To the fourth measurement air supply path (not shown) of the spindle head 25.
- the measurement air is supplied from the first measurement air supply path 70A of the spindle head 25 to the first measurement air supply path 63A of the base end side member 54, and the second measurement air supply of the base end side member 54 is supplied.
- the measurement air is supplied to the path 63B from the second measurement air supply path 70B of the spindle head 25, and the third measurement air supply of the spindle head 25 is supplied to the third measurement air supply path 63C of the base end side member 54.
- Measurement air is supplied from the path, and measurement air is supplied from the fourth measurement air supply path of the spindle head 25 to the fourth measurement air supply path 63D of the base end side member 54.
- These gap measurements may be started from either the Y-axis direction or the X-axis direction, or may be performed simultaneously.
- the four measurement air nozzles 51A to 51D are formed at the measurement head tip portion 43. Therefore, it is not necessary to rotate the measurement head 41 by 90 degrees as in the first embodiment.
- the gap measurement in the Y-axis direction will be described in detail.
- the measurement air adjusted to a constant pressure by a pressure adjusting means such as a regulator from each of the first measurement air supply source 76A and the second measurement air supply source 76B Via the 1A / D converter 77A and the second A / D converter 77B, the first measurement air nozzle 51A (the first measurement air supply path 70A of the spindle head 25) and the second measurement air nozzle at the measurement head tip 43. 51B (second measurement air supply path 70B of the spindle head 25) is supplied.
- these measurement air flows from the first measurement air nozzle 51A and the second measurement air nozzle 51B to the gap ⁇ Y1, between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 31b of the bush hole 31a. It is ejected to ⁇ Y2.
- the first A / D converter 77A and the second A / D converter 77B detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. And output to the control device 81.
- the flow rate of the measurement air is obtained from the pressure detection signals output from the first A / D converter 77A and the second A / D converter 77B, and data of the measurement air flow rate are stored in advance.
- the gap ⁇ Y1 and the gap ⁇ Y2 are obtained on the basis of data representing the relationship between the measurement air flow rate and the gap as exemplified in FIG.
- the control device 81 calculates the eccentric amount ⁇ Y of the main shaft 26 (drilling tool 32) and the bush hole 31a in the Y-axis direction by the above equation (1) based on the measured values of these gaps ⁇ Y1, ⁇ Y2,
- the eccentricity ⁇ Y is output to the sequencer 80.
- a pressure adjusting means such as a regulator from each of the third measurement air supply source 76C and the fourth measurement air supply source 76D.
- the measurement air is changed from the third measurement air nozzle 51C and the fourth measurement air nozzle 51D to the gap ⁇ X1, between the outer peripheral surface 43a of the measurement head tip 43 and the inner peripheral surface 31b of the bush hole 31a. It is ejected to ⁇ X2.
- the third A / D converter 77C and the fourth A / D converter 77D detect the pressure of each measurement air (corresponding to the flow rate of the measurement air), and convert these detection signals into digital signals. And output to the control device 81.
- the flow rate of the measurement air is obtained from the pressure detection signals output from the third A / D converter 77C and the fourth A / D converter 77D, and data of the measurement air flow rate are stored in advance.
- the gap ⁇ X1 and the gap ⁇ X2 are obtained based on data representing the relationship between the measurement air flow rate and the gap as exemplified in FIG.
- the control device 81 calculates the eccentric amount ⁇ X between the main shaft 26 (drilling tool 32) and the bush hole 31a in the X-axis direction by the above equation (2) based on the measured values of these gaps ⁇ X1, ⁇ X2,
- the eccentricity ⁇ X is output to the sequencer 80.
- the sequencer 80 stores the eccentricity amounts ⁇ X and ⁇ Y input from the control device 81 in macro variables of the NC device 78.
- the position of the main shaft 26 is controlled by shifting the X and Y coordinates in accordance with the eccentric amounts ⁇ X and ⁇ Y (that is, the relative position between the main shaft 26 and the bush hole 31a is corrected).
- the shaft core of the main shaft 26 (drilling tool 32) and the shaft core of the bush hole 31a are aligned to prevent uneven wear of the bush hole 31a.
- data representing the relationship between the measurement air flow rate and the gap as illustrated in FIG. 6 is obtained using the air micrometer calibration device 91 described in the first embodiment. Obtained by calibrating the meter.
- the procedure of the calibration operation is the same as that in the first embodiment. Referring to FIGS. 8A, 11 and 13, after the air blow is performed (or not performed) on the air micrometer calibration device 91 as described above, first, the measurement head tip 43 is moved. Insert into the small diameter master hole 95. At this time, the measuring head main body 42 (case 46) is positioned in the clamping sleeve 93.
- a regulator or the like is supplied from each of the first measurement air supply source 76A, the second measurement air supply source 76B, the third measurement air supply source 76C, and the fourth measurement air supply source 76D.
- the measurement air adjusted to a constant pressure by the pressure adjusting means is passed through the first A / D converter 77A, the second A / D converter 77B, the third A / D converter 77C, and the fourth A / D converter 77D.
- the first measurement air nozzle 51A first measurement air supply path 70A of the spindle head 25
- the second measurement air nozzle 51B second measurement air supply path 70B of the spindle head 25
- the air is supplied to the measurement air nozzle 51C (third measurement air supply path of the spindle head 25) and the fourth measurement air nozzle 51D (third measurement air supply path of the spindle head 25).
- these measurement air flows from the first measurement air nozzle 51A, the second measurement air nozzle 51B, the third measurement air nozzle 51C, and the fourth measurement air nozzle 51D to the outer peripheral surface 43a and the small diameter of the measurement head tip portion 43.
- the pressure of the measurement air (corresponding to the flow rate of the measurement air). ) are detected, and these detection signals are converted into digital signals and output to the control device 81.
- the flow rate of the measurement air is determined from the pressure detection signals output from the first A / D converter 77A, the second A / D converter 77B, the third A / D converter 77C, and the fourth A / D converter 77D.
- Q1 is obtained, and the data of the measurement air flow rate Q1 and the data of the gap ⁇ G1 inputted in advance are stored as data of the point P1 representing the relationship between the measurement air flow rate Q1 and the gap ⁇ G1 as shown in FIG. To do.
- the axis of the measurement head tip 43 and the axis of the large diameter master hole 96 coincide. That is, as shown in FIG. 13, the gap ⁇ G2 between the outer peripheral surface 43a of the measuring head tip 43 and the inner peripheral surface 96a of the large-diameter master hole 96 is constant (predetermined). Value).
- each of the first measurement air supply source 76A, the second measurement air supply source 76B, the third measurement air supply source 76C, and the fourth measurement air supply source 76D as in the case of the small-diameter master hole 95.
- the measurement air adjusted to a constant pressure by pressure adjusting means such as a regulator is used as a first A / D converter 77A, a second A / D converter 77B, a third A / D converter 77C, and a fourth A / D converter 77D.
- the first measurement air nozzle 51A (first measurement air supply path 70A of the spindle head 25) and the second measurement air nozzle 51B (second measurement air supply path 70B of the spindle head 25) ),
- the third measurement air nozzle 51C (third measurement air supply path of the spindle head 25) and the fourth measurement air nozzle 51D (fourth measurement air supply path of the spindle head 25).
- these measurement airs are large from the first measurement air nozzle 51A, the second measurement air nozzle 51B, the third measurement air nozzle 51C, and the fourth measurement air nozzle 51D to the outer peripheral surface 43a of the measurement head tip 43. It is ejected into a gap ⁇ G2 between the inner surface 96a of the master hole 96 having a diameter.
- the pressure of the measurement air (corresponding to the flow rate of the measurement air). ) are detected, and these detection signals are converted into digital signals and output to the control device 81.
- the flow rate of the measurement air is determined from the pressure detection signals output from the first A / D converter 77A, the second A / D converter 77B, the third A / D converter 77C, and the fourth A / D converter 77D.
- Q2 is obtained, and the data of the measurement air flow rate Q2 and the previously inputted data of the gap ⁇ G2 are stored as data of the point P2 representing the relationship between the measurement air flow rate Q2 and the gap ⁇ G2 as shown in FIG. To do.
- the data between this point P2 and the aforementioned point P1 is obtained by linear interpolation.
- data representing the relationship between the measurement air flow rate and the gap as shown in FIG. 6 is obtained.
- the measurement head 41 is attached to the spindle 26 of the machine tool 21 during measurement and is inserted into the bush hole 31a of the bush 31 attached to the work table 23 of the machine tool 21.
- the measurement head tip portion 43 is inserted into the bushing hole 31a, and the measurement head tip portion 43 has the outer peripheral surface 43a from the ejection ports 51A-1 to 51D-1 of the outer peripheral surface 43a of the measurement head tip portion 43 at the time of measurement.
- the first measurement air nozzle 51B and the second measurement air nozzle 51B for injecting the measurement air into the gap between the bush hole 31a and the inner peripheral surface 31b of the bush hole 31a.
- the third measurement air nozzle 51 ⁇ / b> C and the fourth measurement air nozzle 51 ⁇ / b> D are formed along the radial direction of the measurement head distal end portion 43 and are formed so as to have an angle of 90 degrees in the circumferential direction of the measurement head distal end portion 43.
- the measurement head main body 42 includes individual measurement air supply paths corresponding to the measurement air nozzles 51A to 51D (that is, supply paths including first measurement air supply paths 53A, 55A, 63A and a hose 64A, A first measurement air supply path 53B, 55B, 63B and a hose 64B, a third measurement air supply path 53C, 55C, 63C and a hose 64C, a fourth measurement air supply path 53D, 55D, 63D and a hose 64D) are formed, and each measurement air nozzle 51A to 51D has its own measurement air.
- supply paths including first measurement air supply paths 53A, 55A, 63A and a hose 64A, A first measurement air supply path 53B, 55B, 63B and a hose 64B, a third measurement air supply path 53C, 55C, 63C and a hose 64C, a fourth measurement air supply path 53D, 55D, 63D and a hose 64D
- the eccentric amounts ⁇ X, ⁇ Y of the main shaft 26 and the bush hole 31a are obtained, and this eccentricity
- the shaft core of the main shaft 26 (drilling tool 32) and the shaft core of the bush hole 31a can be prevented.
- the measurement air is supplied to the first measurement air supply path 70A and the second measurement air supply path 70A formed in the spindle head 25.
- a first measurement air supply path 63A, a second measurement air supply path 63B, and a third measurement air supply path 63C of the measurement head body 42 are provided. Since the fourth measurement air supply path 63D is configured to be supplied to each of the fourth measurement air supply paths 63D, measurement air can be supplied from the spindle head 25, and a measurement air supply hose or the like can be directly supplied to the measurement head 41. Since there is no need to connect the supply means, it is possible to obtain effects such as easy measurement operations such as attachment / detachment of the measurement head 41 to / from the main shaft 26.
- the measurement head tip portion 43 has a front side from the ejection ports 52A-1 to 52D-1 of the tapered surface 49 at the tip side periphery at the time of measurement.
- Air blow nozzles 52A to 52D for blowing air blow air toward the inner peripheral surface 31b of the bushing hole 31a are formed, and the air blow air is supplied to the air blow nozzles 52A to 52D to the measurement head main body 42. Since air supply paths 56 and 65 for air blow are formed, even if foreign matter such as cutting dust adheres to the inner peripheral surface 31b of the bush hole 31a, the inner peripheral surface 31b of the bush hole 31a is formed by air blow. Since the gap can be measured after removing the foreign matter from the surface, accurate gap measurement can be performed.
- air blow air is supplied from the air blow air supply path 73 formed in the spindle head 25 to the rotary joint 71 attached to the spindle 26. Since the air blow air supply passage 72 and the air blow air supply passage 75 formed in the main shaft 26 are supplied to the air blow air supply passage 65 of the measuring head main body 42, the main shaft is used. Since air blow air can be supplied from the head 25 and there is no need to connect a supply means such as an air blow air supply hose directly to the measurement head 41, measurement operations such as attachment / detachment of the measurement head 41 to / from the spindle 26 are possible. Can be obtained.
- the measurement head main body portion 42 includes a tip side member (connection portion 45, case 46) to which the measurement head tip portion 43 is fixed, and A proximal end member 54, a coil spring 74 interposed between the distal end side member (connecting portion 45, case 46) and the proximal end side member 54, and a measurement formed on the distal end side member (case 46) It is characterized by having flexible hoses 64A, 64B connecting the air supply paths 55A, 55B and the measurement air supply paths 63A, 63B formed in the base end side member 54.
- FIG. 14 (a) is a side view of the main part of the measuring head of the air micrometer according to the third embodiment of the present invention
- FIG. 14 (b) is a view in the direction of the arrow N in FIG. 14 (a)
- FIG. ) Is a cross-sectional view taken along line OO in FIG. 14 (a)
- FIG. 14 (d) is a cross-sectional view taken along line PP in FIG. 14 (a)
- FIG. 14 (e) is FIG. 14 (a).
- FIG. 15 is a cross-sectional view taken along the line QQ
- FIG. 15 is a diagram showing how the gap is measured by the measuring head (similar to FIG. 5), and FIG.
- FIG. 16 calibrates the measuring head using an air micrometer calibration device. It is a figure (similar figure to FIG.8 (b)) which shows a mode to do.
- FIG. 17 shows a method for calculating the amount of eccentricity.
- FIG. 17A shows a state in which the tip of the measuring head and the bush hole are not eccentric, and
- FIG. 17B shows the measurement.
- FIG. 17C is a view showing a state where the head tip is eccentric only in the X-axis direction with respect to the bush hole, and
- FIG. 17C is an enlarged view of a main part in the state of FIG.
- the example of the machine tool to which the measurement head of the third embodiment is applied and the mounting state on the spindle are the same as those in FIGS. 1A and 1B, and the illustration and detailed description here. Is omitted.
- the air micrometer calibration device 91 described in the first embodiment is applied to the calibration of the measuring head of the third embodiment (see FIGS. 7 and 8). Therefore, the detailed description about the calibration apparatus for air micrometer here is abbreviate
- the same reference numerals are given to the same parts as those in the first embodiment, and a detailed description thereof is omitted, and the base end of the measurement head main body is omitted. The illustration of the side portion is omitted.
- the first measurement air nozzle 51 ⁇ / b> A and the second measurement air nozzle 51 ⁇ / b> B formed at the measurement head tip 43 have an angle of 180 degrees with respect to the circumferential direction of the measurement head tip 43.
- the measurement head 41 of the third embodiment is arranged at the distal end portion 43 of the measurement head.
- the formed first measurement air nozzle 51 ⁇ / b> A and second measurement air nozzle 51 ⁇ / b> B have an angle of 90 degrees with respect to the circumferential direction of the measurement head tip portion 43, and the measurement air at the connection portion 45 is characterized in that
- the measurement air supply passages and hoses of the respective parts such as the supply passages 53A and 53B and the measurement air supply passages 55A and 55B of the case 46 are also arranged in accordance with the first and second measurement air nozzles 51A and 51B.
- the rotary joint is not mounted similarly to the measurement head 41 (see FIG. 9) of the second embodiment, and the above The difference from Embodiment 1 is that the rotary joint 67 (the first and second measurement air supply paths 68A and 68B) is not interposed in the measurement air supply path.
- the system configuration of the air micrometer and the procedure of the gap measurement operation are the same as those in the first embodiment (see FIG. 4).
- the first measurement air nozzle 51A and the second measurement air nozzle 51B are arranged at an angle of 90 degrees as shown in FIG. 15, the first measurement air nozzle is not rotated without rotating the measurement head 41.
- 51A can measure the gap ⁇ Y1 in the Y-axis direction
- the second measurement air nozzle 51B can measure the gap ⁇ X1 in the X-axis direction. This is different from the first embodiment.
- the measured values of the gaps ⁇ X1 and ⁇ Y1 are stored in the control device 81 in advance with the outer peripheral surface 43a of the measurement head tip portion 43 when not eccentric.
- the eccentric amounts ⁇ X and ⁇ Y are calculated by subtracting from the gap value between the bush hole 31a and the inner peripheral surface 31b. Specifically, the eccentric amounts ⁇ X and ⁇ Y are calculated by one of the first eccentric amount calculating method and the second eccentric amount calculating method described below.
- the first eccentricity calculation method is a method for obtaining the eccentricity amounts ⁇ X and ⁇ Y by solving the following simultaneous equations (3) and (4).
- ⁇ X ⁇ X 0 ⁇ X1-R (1-cos (sin ⁇ 1 ( ⁇ Y / R))
- ⁇ Y ⁇ Y 0 ⁇ Y1-R (1-cos (sin ⁇ 1 ( ⁇ X / R)) (4)
- ⁇ X 0 and ⁇ Y 0 are the gap values in the X-axis direction and the Y-axis direction that are input in advance as initial values to the control device 81, that is, the tip of the measuring head when not eccentric It is a gap value between the outer peripheral surface 43a of the part 43 and the inner peripheral surface 31b of the bush hole 31a.
- R is the radius of the bush hole 31a input in advance to the control device 81. It should be noted that the radius r of the measuring head tip 43 may also be input in advance to the control device 81, and the initial values ⁇ X 0 and ⁇ Y 0 may be calculated from the difference between R and R (R ⁇ r).
- the gaps ⁇ X1 and ⁇ Y1 are measured from the pressure detection signals (digital signals) of measurement air input from the A / D converters 77A and 77B (see FIG. 4) in the control device 81 as in the first embodiment.
- the flow rate of the measurement air is obtained and obtained based on the measurement air flow rate data and the data representing the relationship between the measurement air flow rate and the gap stored in advance.
- the measurement head tip 43 and the bush hole 31a are not eccentric as shown in FIG. 17A, and the measurement head tip 43 is pressed into the bush hole 31a as shown in FIG. 17B.
- eccentrically only [Delta] Y only in the Y-axis direction with respect if the gap value in the Y-axis direction measured by the first measurement air nozzle 51A is consisted [Delta] Y 0 of the initial value [Delta] Y1, polarized in the Y-axis direction
- the core amount ⁇ Y can be obtained by the following (5).
- ⁇ Y ⁇ Y 0 ⁇ Y1 (5)
- the X-axis direction is not actually decentered, but as shown in FIG.
- the Y-axis direction is the same as that in the X-axis direction, and this is the case where the measurement head tip 43 is eccentric by ⁇ X only in the X-axis direction with respect to the bush hole 31a.
- the eccentric amount ⁇ Y in the Y-axis direction can be obtained from the following equation (8).
- ⁇ Y ⁇ Y 0 ⁇ Y1 ⁇ Y ′
- the equation (4) is obtained by substituting the equation (9) into the equation (8).
- the second eccentricity calculation method is a method of ignoring the change amounts ⁇ X ′ and ⁇ Y ′ and obtaining the eccentricity amounts ⁇ X and ⁇ Y by the following equations (10) and (11).
- ⁇ X ⁇ X 0 ⁇ X1 (10)
- ⁇ Y ⁇ Y 0 ⁇ Y1 (11)
- the calibration of the measuring head 41 in the third embodiment is the same as that in the first embodiment. That is, data (see FIG. 6) representing the relationship between the gaps ⁇ G1 and ⁇ G2 and the measurement air flow rate as shown in FIG. 16 is obtained using the air micrometer calibration device 91 described in the first embodiment.
- the measurement head 41 is attached to the spindle 26 of the machine tool 21 during measurement and is inserted into the bush hole 31a of the bush 31 attached to the work table 23 of the machine tool 21.
- the measurement head tip portion 43 is inserted into the bushing hole 31a, and the measurement head tip portion 43 has the outer peripheral surface 43a from the ejection ports 51A-1 and 51B-1 of the outer peripheral surface 43a of the measurement head tip portion 43 at the time of measurement.
- the first measurement air nozzle 51B and the second measurement air nozzle 51B for injecting the measurement air into the gap between the bush hole 31a and the inner peripheral surface 31b of the bush hole 31a.
- the measurement head tip portion 43 is formed along the radial direction of the measurement head tip portion 43 so as to have an angle of 90 degrees with respect to the circumferential direction of the measurement head tip portion 43.
- 51B corresponding to individual measurement air supply paths (that is, a first measurement air supply path 53A, 55A, 63A and a hose 64A, a first measurement air supply path 53B, 55B, 63B and a hose 64B).
- the measurement air is supplied to the measurement air nozzles 51A and 51B from the individual measurement air supply paths.
- the amount of eccentricity ⁇ X, ⁇ Y between the main shaft 26 and the bush hole 31a is obtained by subtracting from the value, and the position of the main shaft 26 is controlled according to the amount of eccentricity ⁇ X, ⁇ Y (that is, the relative position between the main shaft 26 and the bush hole 31a). Therefore, the shaft core of the main shaft 26 (drilling tool 32) and the shaft core of the bush hole 31a can be matched to prevent uneven wear of the bush hole 31a.
- the measurement air is supplied from the first measurement air supply path 70A and the second measurement air supply path 70A formed in the spindle head 25.
- the measurement head main body 42 is configured to be supplied to the first measurement air supply path 63A and the second measurement air supply path 63B, so that the measurement air is supplied from the spindle head 25. Since it is not necessary to connect a supply means such as a measurement air supply hose directly to the measurement head 41, an effect such as easy measurement operation such as attachment / detachment of the measurement head 41 to / from the main shaft 26 can be obtained. .
- the measurement head tip 43 has a front side from the outlets 52A-1 to 52D-1 of the tapered surface 49 on the tip side peripheral edge at the time of measurement.
- Air blow nozzles 52A to 52D for blowing air blow air toward the inner peripheral surface 31b of the bushing hole 31a are formed, and the air blow air is supplied to the air blow nozzles 52A to 52D to the measurement head main body 42. Since air supply paths 56 and 65 for air blow are formed, even if foreign matter such as cutting dust adheres to the inner peripheral surface 31b of the bush hole 31a, the inner peripheral surface 31b of the bush hole 31a is formed by air blow. Since the gap can be measured after removing the foreign matter from the surface, accurate gap measurement can be performed.
- air blow air is supplied from the air blow air supply path 73 formed in the spindle head 25 to the rotary joint 71 attached to the spindle 26. Since the air blow air supply passage 72 and the air blow air supply passage 75 formed in the main shaft 26 are supplied to the air blow air supply passage 65 of the measuring head main body 42, the main shaft is used. Since air blow air can be supplied from the head 25 and there is no need to connect a supply means such as an air blow air supply hose directly to the measurement head 41, measurement operations such as attachment / detachment of the measurement head 41 to / from the spindle 26 are possible. Can be obtained.
- the measurement head main body portion 42 includes a tip side member (connection portion 45, case 46) to which the measurement head tip portion 43 is fixed, and A proximal end member 54, a coil spring 74 interposed between the distal end side member (connecting portion 45, case 46) and the proximal end side member 54, and a measurement formed on the distal end side member (case 46) It is characterized by having flexible hoses 64A, 64B connecting the air supply paths 55A, 55B and the measurement air supply paths 63A, 63B formed in the base end side member 54.
- FIG. 18A is a side view of the main part of the measurement head of the air micrometer according to the fourth embodiment of the present invention
- FIG. 18B is a view taken in the direction of the arrow R in FIG. 18A
- FIG. ) Is a cross-sectional view taken along line SS of FIG. 18A
- FIG. 18D is a cross-sectional view taken along line VV of FIG. 18A
- FIG. 19A is a gap measurement by the measuring head.
- FIG. 19 (b) is a diagram showing a state in which the measuring head is rotated 90 degrees from the state of FIG. 19 (a) (similar to FIG. 5).
- FIG. 20 is a diagram (similar to FIG. 8B) showing how the measurement head is calibrated using an air micrometer calibration device.
- the example of the machine tool to which the measurement head according to the fourth embodiment is applied and the mounting state to the spindle are the same as those in FIGS. 1A and 1B, and the illustration and detailed description here. Is omitted.
- the air micrometer calibration device 91 described in the first embodiment is applied to the calibration of the measuring head of the fourth embodiment (see FIGS. 7 and 8). Therefore, the detailed description about the calibration apparatus for air micrometer here is abbreviate
- the same reference numerals are given to the same parts as those in the first embodiment, and a detailed description thereof is omitted, and the base end of the measurement head main body is omitted.
- the illustration of the side portion is omitted.
- the measuring head 41 of the fourth embodiment is characterized in that only one measuring air nozzle 51A is formed at the measuring head tip 43, and the connecting portion is adjusted accordingly.
- the other configuration is the same as that of the first embodiment.
- the gap ⁇ Y1 in the Y-axis direction is measured in the state shown in FIG. 19A, and then the spindle by the NC device 78 (see FIG. 4) as shown in FIG. 19A.
- the gap ⁇ X1 in the X-axis direction is measured by rotating the measurement head 41 (measurement head tip 43) by 90 degrees under the control of 26 (see FIGS. 1 and 2).
- the control device 81 decenters the measured values of the gaps ⁇ X1 and ⁇ Y1 stored in the control device 81 in advance.
- the eccentricity amounts ⁇ X and ⁇ Y are calculated.
- the eccentric amounts ⁇ X and ⁇ Y are calculated by either the first eccentric amount calculating method or the second eccentric amount calculating method.
- the calibration of the measuring head 41 in the fourth embodiment is the same as that in the first embodiment. That is, data (see FIG. 6) representing the relationship between the gaps ⁇ G1, ⁇ G2 and the measurement air flow rate as shown in FIG. 20 is obtained using the air micrometer calibration device 91 described in the first embodiment.
- the measurement head 41 is attached to the spindle 26 of the machine tool 21 during measurement and is inserted into the bush hole 31a of the bush 31 attached to the work table 23 of the machine tool 21.
- the measurement head tip 43 is inserted into the bush hole 31a, and the measurement head tip 43 is connected to the outer peripheral surface 43a and the bush hole 31a from the outlet 51A-1 of the outer peripheral surface 43a of the measurement head tip 43 during measurement.
- One first measurement air nozzle 51 ⁇ / b> A for ejecting measurement air into the gap with the inner peripheral surface 31 b of the measurement head is arranged in the radial direction of the distal end portion 43 of the measurement head.
- the measurement head main body 42 has one measurement air supply path corresponding to the measurement air nozzle 51A (that is, a supply path including the first measurement air supply paths 53A, 55A, 63A and the hose 64A). Is formed, and measurement air is supplied from one measurement air supply path to one measurement air nozzle 51A. Therefore, for example, the main shaft is not the inner diameter of the bush hole 31a.
- the measurement head 41 is rotated by 90 degrees so that the measurement head tip 43 has a first radial direction (X-axis direction) and a second radial direction (Y-axis direction).
- the gaps ⁇ X1 and ⁇ Y1 between the outer peripheral surface 43a and the inner peripheral surface 31b of the bush hole 31a can be measured. Therefore, based on the measured values of the gaps ⁇ X1, ⁇ Y1 (for example, the gap between the outer peripheral surface of the measurement head tip and the inner peripheral surface of the bush hole when the measured values of the gaps ⁇ X1, ⁇ Y1 are not eccentric).
- the amount of eccentricity ⁇ X, ⁇ Y between the main shaft 26 and the bush hole 31a is obtained by subtracting from the value, and the position of the main shaft 26 is controlled according to the amount of eccentricity ⁇ X, ⁇ Y (that is, the relative position between the main shaft 26 and the bush hole 31a). Therefore, the shaft core of the main shaft 26 (drilling tool 32) and the shaft core of the bush hole 31a can be matched to prevent uneven wear of the bush hole 31a.
- the measurement air is supplied from the measurement air supply path 70A formed in the spindle head 25 to the rotary mounted on the measurement head main body 42. Since the measurement air supply path 68A of the joint 67 is supplied to the first measurement air supply path 63A of the measurement head main body 42, measurement air is supplied from the spindle head 25. Since it is not necessary to connect a supply means such as a measurement air supply hose directly to the measurement head 41, it is possible to easily perform measurement operations such as attachment / detachment of the measurement head 41 to / from the spindle 26. can get.
- the measurement head tip 43 has a front side from the ejection ports 52A-1 to 52D-1 of the tapered surface 49 at the tip side periphery at the time of measurement.
- Air blow nozzles 52A to 52D for blowing air blow air toward the inner peripheral surface 31b of the bushing hole 31a are formed, and the air blow air is supplied to the air blow nozzles 52A to 52D to the measurement head main body 42. Since air supply paths 56 and 65 for air blow are formed, even if foreign matter such as cutting dust adheres to the inner peripheral surface 31b of the bush hole 31a, the inner peripheral surface 31b of the bush hole 31a is formed by air blow. Since the gap can be measured after removing the foreign matter from the surface, accurate gap measurement can be performed.
- air blow air is supplied from the air blow air supply path 73 formed in the spindle head 25 to the rotary joint 71 attached to the spindle 26. Since the air blow air supply passage 72 and the air blow air supply passage 75 formed in the main shaft 26 are supplied to the air blow air supply passage 65 of the measuring head main body 42, the main shaft is used. Since air blow air can be supplied from the head 25 and there is no need to connect a supply means such as an air blow air supply hose directly to the measurement head 41, measurement operations such as attachment / detachment of the measurement head 41 to / from the spindle 26 are possible. Can be obtained.
- the measurement head main body 42 includes a tip side member (connecting portion 45, case 46) to which the measurement head tip 43 is fixed, and A proximal end member 54, a coil spring 74 interposed between the distal end side member (connecting portion 45, case 46) and the proximal end side member 54, and a measurement formed on the distal end side member (case 46)
- a flexible hose 64A connecting the air supply passages 55A and 55B and the measurement air supply passages 63A and 63B formed in the proximal end side member 54.
- a rotary joint for supplying measurement air is provided on the main shaft, and not only blow air but also measurement air is supplied to the measurement head via the measurement air supply passage of the rotary joint and the measurement air supply passage of the main shaft. You may make it supply to the measurement air supply path.
- the air blow air is supplied from the air blow air supply path of the spindle head to the air blow air supply path of the measurement head through the air blow air supply path of the rotary joint and the air blow air supply path of the spindle as described above.
- the present invention is not limited to this, and the air blow air supply path of the spindle head is supplied to the air blow air supply path of the measurement head directly or via the air blow air supply path of the rotary joint attached to the measurement head. It's okay.
- the present invention relates to a measurement head of an air micrometer, and is useful when applied to measure the eccentricity of a bush hole and a spindle (drilling tool) in a machine tool.
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Abstract
Description
(2) スタイラス3が折れ易く、このスタイラス3の折損を防止するために主軸を低速度で動作させる必要があるため、計測に時間がかかる。
(3) スタイラス3の故障等により計測ヘッド2を交換する度にダイヤルゲージによる較正が必要であるため、計測に時間がかかる。
計測ヘッド本体部と、この計測ヘッド本体部の先端に設けられて計測時に前記ブッシュ穴に挿入される計測ヘッド先端部とを有し、
前記計測ヘッド先端部には計測時に前記計測ヘッド先端部の外周面の噴き出し口から同外周面と前記ブッシュ穴の内周面との間のギャップに計測用エアを噴き出すための1つの又は複数の計測用エアノズルが形成される一方、前記計測ヘッド本体部には各計測用エアノズルに対応した個別の計測用エア供給路が形成されており、各計測用エアノズルに対してそれぞれ個別の計測用エア供給路から計測用エアが供給される構成としたことを特徴とする。
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つ互いに前記計測ヘッド先端部の周方向に180度の角度を有する第1計測用エアノズルと第2計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路であることを特徴とする。
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つそれぞれが前記計測ヘッド先端部の周方向に90度の角度を有する第1計測用エアノズルと第2計測用エアノズルと第3計測用エアノズルと第4計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路と、前記第3計測用エアノズルに計測用エアを供給する第3計測用エア供給路と、前記第4計測用エアノズルに計測用エアを供給する第4計測用エア供給路であることを特徴とする。
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つ互いに前記計測ヘッド先端部の周方向に90度の角度を有する第1計測用エアノズルと第2計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路であることを特徴とする。
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成された1つの計測用エアノズルであり、
前記計測用エア供給路は、前記1つの計測用エアノズルに計測用エアを供給する1つの計測用エア供給路であることを特徴とする。
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記計測ヘッド本体部に装着されたロータリジョイントの第1計測用エア供給路と第2計測用エア供給路を介して、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたこと、
又は、計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記主軸に装着されたロータリジョイントの第1計測用エア供給路と第2計測用エア供給路及び前記主軸に形成された第1計測用エア供給路と第2計測用エア供給路を介して、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたことを特徴とする。
計測用エアが、前記主軸の支持部に形成された計測用エア供給路から、前記計測ヘッド本体部に装着されたロータリジョイントの計測用エア供給路を介して、前記計測ヘッド本体部の計測用エア供給路へ供給される構成としたこと、
又は、計測用エアが、前記主軸の支持部に形成された計測用エア供給路から、前記主軸に装着されたロータリジョイントの計測用エア供給路と前記主軸に形成された計測用エア供給路を介して、前記計測ヘッド本体部の計測用エア供給路へ供給される構成としたことを特徴とする。
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路と第3計測用エア供給路と第4計測用エア供給路から、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路と第3計測用エア供給路と第4計測用エア供給路へそれぞれ供給される構成としたことを特徴とする。
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたことを特徴とする。
前記計測ヘッド先端部には、計測時にその先端側周縁のテーパ面の噴き出し口から前方へ前記ブッシュ穴の内周面に向かってエアブロー用エアを噴き出すためのエアブロー用ノズルが形成され、
前記計測ヘッド本体部には、前記エアブロー用ノズルにエアブロー用エアを供給するエアブロー用エア供給路が形成されていることを特徴とする。
エアブロー用エアが、前記主軸の支持部に形成されたエアブロー用エア供給路から、直接、又は前記主軸に装着されたロータリジョイントのエアブロー用エア供給路及び前記主軸に形成されたエアブロー用エア供給路を介して、前記計測ヘッド本体部のエアブロー用エア供給路へ供給される構成としたことを特徴とする。
前記計測ヘッド本体部は、前記計測ヘッド先端部が固定されている先端側部材と、基端側部材と、前記先端側部材と前記基端側部材との間に介設された弾性部材と、前記先端側部材に形成された計測用エア供給路と前記基端側部材に形成されている計測用エア供給路とをつないだ可撓性のホースとを有してなるものであることを特徴とする。
51C 第3計測用エアノズル、 51D 第4計測用エアノズル、 51A-1,51B-1,51C-1,51D-1 噴き出し口、 52A,52B,52C,52D エアブロー用ノズル、 52A-1,52B-1,52C-1,52D-1 噴き出し口、 53A 第1計測用エア供給路,計測用エア供給路、 53B 第2計測用エア供給路、 53C 第3計測用エア供給路、 53D 第4計測用エア供給路、 54 基端側部材、 55A 第1計測用エア供給路,計測用エア供給路、 55B 第2計測用エア供給路、 55C 第3計測用エア供給路、 55D 第4計測用エア供給路、 56 エアブロー用エア供給路、 58 長穴、 59 基端部、 60 軸部、 61 先端部、 62 基端側端板、 62a 穴、 63A 第1計測用エア供給路、 63B 第2計測用エア供給路、 63C 第3計測用エア供給路、 63D 第4計測用エア供給路、 64A,64B,64C,64D ホース、 65 エアブロー用エア供給路
66 空間部、 67 ロータリジョイント、 68A 第1計測用エア供給路、 68B 第2計測用エア供給路、 69A 第1カプラ、 69B 第2カプラ、 69C 第3カプラ、 69D 第4カプラ、 70A 第1計測用エア供給路、 70B 第2計測用エア供給路、 71 ロータリジョイント、 72 エアブロー用エア供給路、 73 エアブロー用エア供給路、 74 コイルばね、 75 エアブロー用エア供給路、 76A 第1計測用エア供給源、 76B 第2計測用エア供給源、 76C 第3計測用エア供給源、 76D 第4計測用エア供給源、 77A 第1A/D変換機、 77B 第2A/D変換機、 77C 第3A/D変換機、 77D 第4A/D変換機、 78 NC装置、 79 エアブロー用エア供給源、 80 シーケンサ、 81 制御装置、 91 エアマイクロメータ用較正装置、 92 格納穴、 93 クランピングスリーブ、 93a 内周面、 94 計測ヘッド進入穴、 95 小径のマスタ穴、 95a 内周面、 96 大径のマスタ穴、 96a 内周面、 97 油圧室、 98 圧油供給路、 99 ホース
図1(a)は本発明の実施の形態例1に係るエアマイクロメータの計測ヘッドが適用される工作機械の一例を示す図、図1(b)は前記計測ヘッドを前記工作機械の主軸に装着した状態を示す要部拡大図である。そして、図2は前記計測ヘッドを一部破断して示す側面図、図3(a)は前記計測ヘッドの一部を示す断面図、図3(b)は図2のA方向矢視図、図3(c)は図2のB-B線矢視断面図、図3(d)は図2のC-C線矢視断面図、図4は前記エアマイクロメータのシステム構成図、図5(a)は図4のD方向矢視図、図5(b)は前記計測ヘッドを図5(a)の状態から90度回転させた状態を示す図、図6は計測用エア流量とギャップの関係を表すデータの説明図である。
ΔY=(ΔY1-ΔY2)÷2 ・・・(1)
ΔX=(ΔX1-ΔX2)÷2 ・・・(2)
図9は本発明の実施の形態例2に係るエアマイクロメータの計測ヘッドの側面図、図10(a)は前記計測ヘッドの一部を示す断面図、図10(b)は図9のH方向矢視図、図10(c)は図9のI-I線矢視断面図、図10(d)は図9のJ-J線矢視断面図、図10(e)は図9のK-K線矢視断面図、図10(f)は図9のL-L線矢視断面図、図11は前記エアマイクロメータのシステム構成図、図12は図11のM方向矢視図、図13はエアマイクロメータ用較正装置を用いて前記計測ヘッドを較正する様子を示す図(図8(b)と同様の図)である。
図14(a)は本発明の実施の形態例3に係るエアマイクロメータの計測ヘッドの要部側面図、図14(b)は図14(a)のN方向矢視図、図14(c)は図14(a)のO-O線矢視断面図、図14(d)は図14(a)のP-P線矢視断面図、図14(e)は図14(a)のQ-Q線矢視断面図、図15は前記計測ヘッドによってギャップ計測をする様子を示す図(図5と同様の図)、図16はエアマイクロメータ用較正装置を用いて前記計測ヘッドを較正する様子を示す図(図8(b)と同様の図)である。また、図17には偏芯量の算出方法を示しており、図17(a)は計測ヘッド先端部とブッシュ穴が偏芯していないときの状態を示す図、図17(b)は計測ヘッド先端部がブッシュ穴に対してX軸方向にのみ偏芯した状態を示す図、図17(c)は図17(b)の状態の要部拡大図である。
第1の偏芯量算出方法は、次の(3),(4)の連立方程式を解くことによって偏芯量ΔX,ΔYを求める方法である。
ΔX=ΔX0-ΔX1-R(1-cos(sin-1(ΔY/R)) ・・・(3)
ΔY=ΔY0-ΔY1-R(1-cos(sin-1(ΔX/R)) ・・・(4)
ΔY=ΔY0-ΔY1 ・・・(5)
しかし、X軸方向については、実際には偏芯していないが、図17(b)に示すようにΔYの影響により、第2計測用エアノズル51Bで計測されるX軸方向のギャップ値が、ΔX´だけ変化して、初期値からΔX1となる。そこで、このΔYの影響によるX軸方向のギャップの変化量ΔX´を考慮した場合、X軸方向の偏芯量ΔXは、次の(6)式から求めることができる。図17(b)の場合には(6)式から、偏芯量ΔXは0となる。
ΔX=ΔX0-ΔX1-ΔX´ ・・・(6)
そして、図17(c)に示すとおり、変化量ΔX´は次の(7)式によって求めることができる。従って、この(7)式を(6)式に代入すれば(3)式が得られる。
ΔX´=R-Rcosθ
=R(1-cos(sin-1(ΔY/R)) ・・・(7)
ΔY=ΔY0-ΔY1-ΔY´ ・・・(8)
そして、変化量ΔY´は次の(9)式よって求めることができるため、この(9)式を(8)式に代入すれば(4)式が得られる。
ΔY´=R-Rcosθ
=R(1-cos(sin-1(ΔX/R)) ・・・(9)
第2の偏芯量算出方法は、上記の変化量ΔX´,ΔY´を無視して、次の(10),(11)式によって偏芯量ΔX,ΔYを求める方法である。
ΔX=ΔX0-ΔX1 ・・・(10)
ΔY=ΔY0-ΔY1 ・・・(11)
図18(a)は本発明の実施の形態例4に係るエアマイクロメータの計測ヘッドの要部側面図、図18(b)は図18(a)のR方向矢視図、図18(c)は図18(a)のS-S線矢視断面図、図18(d)は図18(a)のV-V線矢視断面図、図19(a)は前記計測ヘッドによってギャップ計測をする様子を示す図(図5と同様の図)、図19(b)は前記計測ヘッドを図19(a)の状態から90度回転させた状態を示す図(図5と同様の図)、図20はエアマイクロメータ用較正装置を用いて前記計測ヘッドを較正する様子を示す図(図8(b)と同様の図)である。
Claims (12)
- 計測時に工作機械の主軸に装着され、前記工作機械のワークテーブルに取り付けられたブッシュのブッシュ穴に挿入されて、前記ブッシュ穴と前記主軸の偏芯量を計測するためのエアマイクロメータの計測ヘッドであって、
計測ヘッド本体部と、この計測ヘッド本体部の先端に設けられて計測時に前記ブッシュ穴に挿入される計測ヘッド先端部とを有し、
前記計測ヘッド先端部には計測時に前記計測ヘッド先端部の外周面の噴き出し口から同外周面と前記ブッシュ穴の内周面との間のギャップに計測用エアを噴き出すための1つの又は複数の計測用エアノズルが形成される一方、前記計測ヘッド本体部には各計測用エアノズルに対応した個別の計測用エア供給路が形成されており、各計測用エアノズルに対してそれぞれ個別の計測用エア供給路から計測用エアが供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つ互いに前記計測ヘッド先端部の周方向に180度の角度を有する第1計測用エアノズルと第2計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路であることを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つそれぞれが前記計測ヘッド先端部の周方向に90度の角度を有する第1計測用エアノズルと第2計測用エアノズルと第3計測用エアノズルと第4計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路と、前記第3計測用エアノズルに計測用エアを供給する第3計測用エア供給路と、前記第4計測用エアノズルに計測用エアを供給する第4計測用エア供給路であることを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成され且つ互いに前記計測ヘッド先端部の周方向に90度の角度を有する第1計測用エアノズルと第2計測用エアノズルであり、
前記計測用エア供給路は、前記第1計測用エアノズルに計測用エアを供給する第1計測用エア供給路と、前記第2計測用エアノズルに計測用エアを供給する第2計測用エア供給路であることを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測用エアノズルは、前記計測ヘッド先端部の径方向に沿って形成された1つの計測用エアノズルであり、
前記計測用エア供給路は、前記1つの計測用エアノズルに計測用エアを供給する1つの計測用エア供給路であることを特徴とするエアマイクロメータの計測ヘッド。 - 請求項2に記載するエアマイクロメータの計測ヘッドにおいて、
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記計測ヘッド本体部に装着されたロータリジョイントの第1計測用エア供給路と第2計測用エア供給路を介して、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたこと、
又は、計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記主軸に装着されたロータリジョイントの第1計測用エア供給路と第2計測用エア供給路及び前記主軸に形成された第1計測用エア供給路と第2計測用エア供給路を介して、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項5に記載するエアマイクロメータの計測ヘッドにおいて、
計測用エアが、前記主軸の支持部に形成された計測用エア供給路から、前記計測ヘッド本体部に装着されたロータリジョイントの計測用エア供給路を介して、前記計測ヘッド本体部の計測用エア供給路へ供給される構成としたこと、
又は、計測用エアが、前記主軸の支持部に形成された計測用エア供給路から、前記主軸に装着されたロータリジョイントの計測用エア供給路と前記主軸に形成された計測用エア供給路を介して、前記計測ヘッド本体部の計測用エア供給路へ供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項3に記載するエアマイクロメータの計測ヘッドにおいて、
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路と第3計測用エア供給路と第4計測用エア供給路から、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路と第3計測用エア供給路と第4計測用エア供給路へそれぞれ供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項4に記載するエアマイクロメータの計測ヘッドにおいて、
計測用エアが、前記主軸の支持部に形成された第1計測用エア供給路と第2計測用エア供給路から、前記計測ヘッド本体部の第1計測用エア供給路と第2計測用エア供給路へそれぞれ供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測ヘッド先端部には、計測時にその先端側周縁のテーパ面の噴き出し口から前方へ前記ブッシュ穴の内周面に向かってエアブロー用エアを噴き出すためのエアブロー用ノズルが形成され、
前記計測ヘッド本体部には、前記エアブロー用ノズルにエアブロー用エアを供給するエアブロー用エア供給路が形成されていることを特徴とするエアマイクロメータの計測ヘッド。 - 請求項10に記載するエアマイクロメータの計測ヘッドにおいて、
エアブロー用エアが、前記主軸の支持部に形成されたエアブロー用エア供給路から、直接、又は前記主軸に装着されたロータリジョイントのエアブロー用エア供給路及び前記主軸に形成されたエアブロー用エア供給路を介して、前記計測ヘッド本体部のエアブロー用エア供給路へ供給される構成としたことを特徴とするエアマイクロメータの計測ヘッド。 - 請求項1に記載するエアマイクロメータの計測ヘッドにおいて、
前記計測ヘッド本体部は、前記計測ヘッド先端部が固定されている先端側部材と、基端側部材と、前記先端側部材と前記基端側部材との間に介設された弾性部材と、前記先端側部材に形成された計測用エア供給路と前記基端側部材に形成されている計測用エア供給路とをつないだ可撓性のホースとを有してなるものであることを特徴とするエアマイクロメータの計測ヘッド。
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Also Published As
Publication number | Publication date |
---|---|
US20110023584A1 (en) | 2011-02-03 |
CN101918791A (zh) | 2010-12-15 |
JP5010487B2 (ja) | 2012-08-29 |
US8485021B2 (en) | 2013-07-16 |
JP2009168770A (ja) | 2009-07-30 |
CN101918791B (zh) | 2012-08-08 |
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