CN107478167B - Device and method for measuring inner diameter of cylinder sleeve - Google Patents
Device and method for measuring inner diameter of cylinder sleeve Download PDFInfo
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- CN107478167B CN107478167B CN201710660102.XA CN201710660102A CN107478167B CN 107478167 B CN107478167 B CN 107478167B CN 201710660102 A CN201710660102 A CN 201710660102A CN 107478167 B CN107478167 B CN 107478167B
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/003—Measuring of motor parts
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Abstract
The invention discloses a cylinder sleeve inner diameter measuring device, which comprises three-jaw type bases, namely a first base, a second base and a third base, wherein each base is provided with a linear guide rail, a sliding block sliding along the linear guide rail is arranged on each linear guide rail, a sensor mounting plate is arranged on each sliding block, a laser ranging sensor is arranged at the outer end of each sensor mounting plate, at least two V-shaped grooves are arranged at one side of each sensor mounting plate, a ball plunger fixing block is arranged at one side of each V-shaped groove on each base, and a ball plunger is arranged on each ball plunger fixing block; the center of the three-jaw base is provided with a circular boss, and the three-jaw base is positioned in the calibration base of the cylinder sleeve inner diameter measuring device. The invention realizes that the position of the laser ranging sensor can be adjusted and changed, effectively enlarges the measuring range of the measuring device, and ensures the measuring range of the inner diameter of the cylinder sleeve when selecting a small-range sensor with higher precision.
Description
Technical Field
The invention relates to a cylinder sleeve inner diameter measuring device and a measuring method, and belongs to the field of cylinder measurement.
Background
The cylinder sleeve is one of the parts with the worst working environment on the diesel engine, and the precision of the inner diameter of each part directly influences the key technical indexes of the diesel engine, such as the service life, the fuel economy and the like. The current methods for detecting the inner diameter of the cylinder sleeve comprise vernier caliper detection, inner diameter gauge detection, three-point micrometer detection, pneumatic gauge detection and the like. The vernier caliper is simple and convenient to operate when used for detecting the inner diameter of the cylinder sleeve, but only the inner diameter near the end part of the cylinder sleeve can be detected; when the inner diameter gauge detects the inner diameter of the cylinder sleeve, the adjustment is complex, the measuring force is large, the inner wall of the cylinder sleeve has high requirements on the surface of the cylinder sleeve, and the surface of the inner wall of the cylinder sleeve is easily scratched when the operation is improper; the three-point micrometer can only be used for detecting the cylinder sleeve with the inner diameter smaller than 100mm generally, and the pneumatic measuring instrument has the defects of small measuring range, higher measuring cost, higher requirement on environment and the like.
The invention relates to a cylinder body inner diameter measuring device with height dimension, which is invented by Zhang Heiping and is named as CN 205333042U in Chinese patent No. and can measure the straightness (inner wall abrasion degree) in a certain vertical direction, but the device can only measure the dimension change in a vertical straight line in the inner wall in one measurement, and can only obtain the detection of the inner wall dimension in different heights of a cylinder sleeve through multiple measurements, thereby not only consuming a large amount of time, but also limiting the promotion of repeated detection precision, and the measurement precision of the measuring device can be influenced by the straightness and deformation of a mechanism guide device when the measuring the inner diameter of a deeper cylinder sleeve. The invention relates to an inner diameter measuring device invented by Suzhou Qibao precision machinery Limited company, and the Chinese patent authorization publication number is CN 204963740U, and the inner diameter measuring process of a measuring meter is simplified by optimizing the measuring structure of the measuring meter, so that the detection efficiency is greatly improved, but the device has short measuring depth and cannot effectively detect the inner diameter deep in a part with large depth.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the cylinder sleeve inner diameter measuring device and the measuring method, which realize that the position of the laser ranging sensor can be adjusted and changed, and effectively enlarge the measuring range of the measuring device, so that the measuring range of the cylinder sleeve inner diameter can be ensured when the high-precision small-range sensor is selected.
The technical scheme is as follows: in order to solve the technical problem, the cylinder sleeve inner diameter measuring device comprises three-jaw type bases, namely a first base, a second base and a third base, wherein each base is provided with a linear guide rail, a sliding block sliding along the linear guide rails is arranged on each linear guide rail, a sensor mounting plate is arranged on each sliding block, a laser ranging sensor is arranged at the outer end of each sensor mounting plate, at least two V-shaped grooves are arranged on one side of each sensor mounting plate, a ball plunger fixing block is arranged on one side, positioned on each V-shaped groove, of each base, and a ball plunger is arranged on each ball plunger fixing block; the center of the three-jaw base is provided with a circular boss, the three-jaw base is positioned in the calibrating base of the cylinder sleeve inner diameter measuring device, and a circular groove matched with the circular boss is formed in the calibrating base of the cylinder sleeve inner diameter measuring device.
Preferably, the other end of the sensor mounting plate is provided with a gear shifting handle.
Preferably, a protective cover is mounted on the three-jaw base.
Preferably, the ball plunger is mounted on the ball plunger fixing block through threads.
Preferably, the V-shaped grooves are distributed on the sensor mounting plate at equal intervals.
Preferably, the base is provided with a limiting hole, and a limiting pin is arranged in the limiting hole.
A measuring method of the cylinder sleeve inner diameter measuring device comprises the following steps:
a. v-shaped groove position calibration
1) 3 sensor mounting panels have been used altogether in this device, all processed 3V type grooves on each sensor mounting panel, distribute according to 9V type groove positions altogether on 3 sensor mounting panels, divide into groups in 9V type grooves, wherein: the 3V-shaped grooves on the inner side are defined as inner V-shaped grooves, the 3V-shaped grooves in the middle position are defined as middle V-shaped grooves, and the 3V-shaped grooves on the outer side position are defined as outer V-shaped grooves;
2) firstly, calibrating the position of an inner V-shaped groove, moving a sliding block, adjusting the inner V-shaped groove of a sensor mounting plate to the position of a ball plunger and clamping, and selecting a cylinder sleeve inner diameter measuring device corresponding to the position of the inner V-shaped groove for calibrationThe base is used for installing the circular bulge in the middle of the three-jaw base into a circular groove in a calibration base of the cylinder sleeve inner diameter measuring device; after the installation is finished, the whole device is put into a three-coordinate measuring instrument for measurement, and the circle center of a circular bulge in the middle of the three-jaw base is set as O1The circle center of a circular groove in the calibrating base of the cylinder sleeve inner diameter measuring device coincides with the circle center of the three-jaw base, laser emitted by the 3 laser ranging sensors irradiates the inner wall of the calibrating base of the cylinder sleeve inner diameter measuring device to generate 3 light spots, and the 3 light spots are respectively set as P11，P12，P13And the positions of the 3 laser ranging sensors are Q11，Q12，Q13Respectively measured by a three-coordinate measuring instrument to obtain P11，P12，P13The coordinates of the 3 points are respectively P11(a11，b11)，P12(a12，b12)，P13(a13，b13) In the plane, 3 points not on a straight line can define a circle, according to P11，P12，P13The 3 point coordinates can calculate the center O of the circular bulge at the middle part of the three-jaw base1Coordinates, calculated as O1(a1，b1) Are each connected to O1And P11、O1And P12、O1And P13A total of 3 straight lines, each L11，L12，L13Wherein Q is11In a straight line L11Upper, Q12In a straight line L12Upper, Q13In a straight line L13In the above, O can be calculated from the coordinate values1P11、O1P12、O1P13Length (three points P as shown in FIG. 811，P12，P13On the same circle, then O1P11、O1P12、O1P13The lengths should be equal, as should the radii), as shown by the following equation:
respectively reading the values of the three laser ranging sensors and recording the values as c11，c12，c13Where c is11，c12，c13Respectively corresponding to Q11P11、Q12P12、Q13P13Can be calculated to obtain the target calibration value S11：O1Q11、S12：O1Q12、S13：O1Q13As shown in the following formula:
S11＝O1Q11＝O1P11-Q11P11
S12＝O1Q12＝O1P12-Q12P12
S13＝O1Q13＝O1P13-Q13P13
so as to obtain the position S of the inner V-shaped groove11、S12、S13；
The corresponding position S of the middle V-shaped groove can be obtained in the same way21、S22、S23；
Outer V-groove position S31、S32、S33；
b. Cylinder liner internal diameter measurement
According to target measurement cylinder jacket internal diameter theoretical dimension for target cylinder jacket internal diameter theoretical dimension is in this V type groove gear measuring range, puts into the digit control machine tool with target measurement cylinder jacket afterwards, through magnetism base as the connecting piece, adsorbs the circular arch of three-jaw type base bottom with the absorption end of magnetism base on, with the stiff end ann's of magnetism baseThe three-jaw type base is arranged on a cutter frame, the position of the three-jaw type base is controlled and adjusted through a machine tool program, the center of the three-jaw type base reaches the theoretical axis of the cylinder sleeve, then the whole device is controlled to descend to the height of the inner diameter of the cylinder sleeve to be measured, the size of the inner diameter of the cylinder sleeve is measured in real time, and the detection value readings c of three laser ranging sensors can be read respectively1，c2，c3；
c. Cylinder liner inside diameter calculation
Using the circle center O of the cylinder sleeve inner diameter measuring device as an origin, OP1The line is taken as the X axis, and the through origin is perpendicular to the OP1Defining the straight line to the right as Y axis, and calibrating value S according to selected gear1、S2、S3Three spots P can be calculated1、P2、P3Length to origin OP1、OP2、OP3Due to OP1、OP2、OP3The three straight lines are uniformly distributed at 120 degrees and all pass through the origin, and then the coordinate values P of the three light spots can be calculated1(a1，b1)，P2(a2，b2)，P1(a3，b3) Wherein:
a1＝OP1，b1＝0
knowing three points on the edge of the circle, the radius of the circle can be calculated, and the size of the inner diameter of the cylinder liner at the position can be calculated.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the adjustable structure is used, the position of the laser ranging sensor can be adjusted and changed, the measuring range of the measuring device is effectively expanded, the measuring range of the inner diameter of the cylinder sleeve can be ensured when the high-precision small-range sensor is selected, and compared with the measuring device with the same measuring range, the adjustable structure not only reduces the cost, but also improves the measuring precision.
(2) According to the invention, the ball plunger structure is used on the gear shifting structure, and the ball of the ball plunger can be tangent and limited with the V-shaped groove all the time under the acting force of the spring, so that the abrasion in repeated use can be reduced, the stability of the laser ranging sensor is improved, the positioning precision of the laser ranging sensor is improved, and the measurement precision of the laser ranging sensor on the inner diameter of the cylinder sleeve is further improved; simultaneously, the device is matched with a numerical control machine tool, so that the inner diameter size of the cylinder sleeve at different heights can be conveniently measured.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
FIG. 2 is a schematic view of the deshield structure of the device of the present invention.
FIG. 3 is a schematic diagram of a gear shifting mechanism in the device of the present invention.
Fig. 4 is a front view of a gear shifting mechanism in the device of the present invention.
Fig. 5 is a sectional view a-a of a front view of a shift mechanism in the apparatus of the present invention.
Fig. 6 is a partial view a of a section a-a of the front view of the shift mechanism in the apparatus of the present invention.
FIG. 7 shows a calibration base of the cylinder liner inside diameter measuring device in the device of the present invention.
FIG. 8 is a schematic diagram of the inner V-groove position calibration method in the measuring method of the device of the present invention.
Fig. 9 is a schematic view of the measuring cylinder liner of the device of the present invention.
Wherein: the device comprises a three-jaw base, a gear shifting mechanism, a linear sliding rail, a sliding block, a ball plunger fixing block, a ball plunger, a sensor mounting plate, a limiting pin, a gear shifting handle, a laser ranging sensor, a protective cover and a cylinder sleeve inner diameter measuring device, wherein the three-jaw base is 1, the gear shifting mechanism is 2, the linear sliding rail is 21, the sliding block is 22, the ball plunger fixing block is 23, the ball plunger is 24, the sensor mounting plate is 25, the limiting pin is 26.
Detailed Description
As shown in fig. 1 to 9, the adjustable cylinder liner inner diameter measuring device of the present invention includes a three-jaw base 1, a laser ranging sensor 3, a gear shifting mechanism 2, a protective cover 4, and a cylinder liner inner diameter measuring device calibration base 5. The three-jaw type base 1 is in a three-jaw type, a circular bulge is arranged in the middle, three rectangular platforms with the same size are respectively extended out in three directions of the circumference of the three-jaw type base, namely the base, a strip-shaped groove is respectively processed in the middle of each rectangular platform and used for positioning and installing a linear slide rail 21 in a gear shifting mechanism 2, a threaded hole is processed in each strip-shaped groove, hole sites are applied to linear slide rail installation holes in the gear shifting mechanism in a pair, a rectangular groove is processed on the right side of each rectangular platform in a certain distance, the size of each rectangular platform is the same as that of a ball plunger fixing block 23 in the gear shifting mechanism 2, a threaded hole is formed in the bottom of each groove, the hole sites correspond to the installation holes of the ball plunger fixing block 23, a limiting hole is further processed in each rectangular platform and used for installing a limiting pin 26 in the gear shifting mechanism 2 and limiting the moving range of, for connecting the protective cover 4. The two grooves and the threaded holes processed on each rectangular platform of the three-jaw base are distributed at an angle of 120 degrees on the circumference. The laser ranging sensor 3 is a selected sensor for performing distance detection.
As shown in fig. 3, the gear shifting mechanism 2 includes a linear slide rail 21, a slide block 22, a ball plunger fixing block 23, a ball plunger 24, a sensor mounting plate 25, a limit pin 26 and a gear shifting handle 27. The linear slide rail 21 is arranged in a strip-shaped groove in the middle of the rectangular platform extended from the three-jaw base 1, through screw connection, the slide block 22 is matched with the linear slide rail 21 to work, the sensor mounting plate 25 is connected with the slide block 22 through screws and moves along the linear slide rail 21 transversely along with the slide block 22, the laser ranging sensor 3 is connected with a side plate of the sensor mounting plate 25 through screws, an external thread processed at one end of a gear shifting handle 27 is matched and connected with a threaded hole on the sensor mounting plate 25, a limit pin 26 is connected on the three-jaw base 1, the moving range of the sliding block 22 is limited, the ball plunger fixing block 23 is connected with the three-jaw base 1 through screws, the ball plunger fixing block 23 is in threaded connection with the ball plunger 24, and the ball plunger 24 is matched with a V-shaped groove in one side of the sensor mounting plate 25 to achieve gear adjustment and positioning of linear movement of the sliding block 22.
In the invention, 3V-shaped grooves are equidistantly formed on one side of the sensor mounting plate 25 and are matched with the ball plunger 24 for limiting. A rectangular plate extends upwards from the side face of the end part of the sensor mounting plate 25, the size of the rectangular plate is the same as that of the laser ranging sensor 3, a through hole is processed in the position, corresponding to the mounting hole of the laser ranging sensor 3, of the rectangular plate, four mounting holes are processed in the position, corresponding to the sliding block 22, of the other end of the sensor mounting plate 25 and used for being mounted with the sliding block 22, and gear shifting threaded holes are formed in the middle positions of the four mounting holes and used for being connected with a gear shifting handle 27. The ball plunger 24 and the V-shaped groove formed in the sensor mounting plate 25 are on the same horizontal plane.
In the invention, the protective cover 4 is formed by welding thin plates, the size and shape of the protective cover 4 are similar to those of the three-jaw base 1, the protective cover is in a three-jaw type, through holes are processed at positions of threaded holes used for the side surfaces of the three-jaw base 1 on the lower side of the protective cover 4, the through holes are matched with the threaded holes processed on the two side surfaces of each rectangular platform of the three-jaw base 1, the through holes and the threaded holes are connected through screws, waist-shaped holes are processed at the tops of the jaws of the protective cover 4, the gear shifting handle 27 can conveniently extend out, and the length of each.
In the invention, the calibrating base 5 of the cylinder sleeve inner diameter measuring device is a tubular part with one closed end, a circular groove is processed at the central position of the bottom of the calibrating base 5, the inner diameters of the circular groove and the calibrating base 5 of the cylinder sleeve inner diameter measuring device are concentric circles, and the size of the circular groove is the same as that of a circular bulge in the middle of the three-jaw base 1.
The device of the present invention will be further described by taking the measurement of the diameter of 200-360mm cylinder liner as an example.
1. V-shaped groove position calibration
1) The device is a gear-adjustable device, a laser distance measuring sensor 3 is selected according to the diameter change range, the measuring range of the laser distance measuring sensor 3 is 15mm-45mm, the measuring range is 30mm, and the total measuring range is divided into three stages of 200 plus 360 mm: 200-: 3V type grooves of inboard are defined as inboard V type groove, and 3V type grooves of intermediate position are defined as middle part V type groove, and 3V type grooves of outside position are defined as outside V type groove. Wherein the gear corresponding range of the outer V-shaped groove is 305-360mm, the gear corresponding range of the middle V-shaped groove is 252-307mm, and the gear corresponding range of the inner V-shaped groove is 200-255mm, and the calibration base 5 of the cylinder liner inner diameter measuring device in the same way has three types, the diameters of the inner walls of the calibration base 5 are 225mm, 285mm and 335mm respectively, wherein the gear of the outer V-shaped groove corresponds to the calibration base 5 of the cylinder liner inner diameter measuring device with the size of 335mm, the gear of the inner V-shaped groove corresponds to the calibration base 5 of the cylinder liner inner diameter measuring device with the size of 285mm, and the gear of the inner V-shaped groove corresponds to the calibration base 5 of the cylinder liner inner diameter measuring;
2) firstly, the position of the inner V-shaped groove is calibrated, the measuring device is adjusted to the position of the inner V-shaped groove through the gear shifting handle 27 and clamped, the cylinder sleeve inner diameter measuring device corresponding to the position of the inner V-shaped groove is selected to calibrate the base 5, and the circular bulge at the middle part of the three-jaw base 1 is arranged in the circular groove in the cylinder sleeve inner diameter measuring device calibration base 5. After the installation is finished, the whole device is put into a three-coordinate measuring instrument for measurement, and the circle center of a circular bulge at the middle part of the three-jaw base 1 is set as O1The circle center of a circular groove in the calibration base 5 of the cylinder sleeve inner diameter measuring device coincides with the circle center of the three-jaw base 1, laser emitted by the 3 laser ranging sensors 3 irradiates the inner wall of the calibration base 5 of the cylinder sleeve inner diameter measuring device to generate 3 light spots, and the 3 light spots are respectively P11，P12，P13And the positions of the 3 laser ranging sensors are Q11，Q12，Q13Respectively measured by a three-coordinate measuring instrument to obtain P11，P12，P13The coordinates of the 3 points are respectively P11(a11，b11)，P12(a12，b12)，P13(a13，b13) In the plane, 3 points not on a straight line can define a circle, according to P11，P12，P13The 3 point coordinates can calculate the center of a circular bulge in the middle of the three-jaw base 1O1Coordinates, calculated as O1(a1，b1). Are respectively connected with O1And P11、O1And P12、O1And P13A total of 3 straight lines, each L11，L12，L13Wherein Q is11In a straight line L11Upper, Q12In a straight line L12Upper, Q13In a straight line L13The above. Based on the above coordinate values, O can be calculated1P11、O1P12、O1P13Length, as shown in the following formula:
reading the values of the three laser distance measuring sensors 3 respectively and recording the values as c11，c12，c13Where c is11，c12，c13Respectively corresponding to Q11P11、Q12P12、Q13P13Can be calculated to obtain the target calibration value S11：O1Q11、S12：O1Q12、S13：O1Q13As shown in the following formula:
S11＝O1Q11＝O1P11-Q11P11
S12＝O1Q12＝O1P12-Q12P12
S13＝O1Q13＝O1P13-Q13P13
and then toThe position S of the inner V-shaped groove can be obtained11、S12、S13。
3) Middle V-shaped groove calibration
The measuring device is adjusted to the middle V-shaped groove position and clamped through the gear shifting handle 27, the cylinder sleeve inner diameter measuring device corresponding to the middle V-shaped groove position is selected to calibrate the base 5, and the circular bulge in the middle of the three-jaw base 1 is arranged in the circular groove in the cylinder sleeve inner diameter measuring device calibration base 5. After the installation is finished, the whole device is put into a three-coordinate measuring instrument for measurement, and the circle center of a circular bulge at the middle part of the three-jaw base 1 is set as O2The circle center of a circular groove in the calibrating base 5 of the cylinder sleeve inner diameter measuring device coincides with the circle center of the three-jaw base, laser emitted by the 3 laser ranging sensors 3 irradiates the inner wall of the calibrating base 5 of the cylinder sleeve inner diameter measuring device to generate 3 light spots, and the 3 light spots are respectively P21，P22，P23And the positions of the 3 laser ranging sensors are Q21，Q22，Q23Respectively measured by a three-coordinate measuring instrument to obtain P21，P22，P23The coordinates of the 3 points are respectively P21(a21，b21)，P22(a22，b22)，P23(a23，b23) In the plane, 3 points not on a straight line can define a circle, according to P21，P22，P23The 3 point coordinates can calculate the center O of the circular bulge at the middle part of the three-jaw base 12Coordinates, calculated as O2(a2，b2). Are respectively connected with O2And P21、O2And P22、O2And P23A total of 3 straight lines, each L21，L22，L23Wherein Q is21In a straight line L21Upper, Q22In a straight line L22Upper, Q23In a straight line L23The above. Based on the above coordinate values, O can be calculated2P21、O2P22、O2P23Length, as shown in the following formula:
reading the values of the three laser distance measuring sensors 3 respectively and recording the values as c21，c22，c23Where c is21，c22，c23Respectively corresponding to Q21P21、Q22P22、Q23P23Can be calculated to obtain the target calibration value S21：O2Q21、S22：O2Q22、S23：O2Q23As shown in the following formula:
S21＝O2Q21＝O2P21-Q21P21
S22＝O2Q22＝O2P22-Q22P22
S23＝O2Q23＝O2P23-Q23P23
so as to obtain the position S of the middle V-shaped groove21、S22、S23。
4) Outside V-groove calibration
The measuring device is adjusted to the position of the outer V-shaped groove and clamped through the gear shifting handle 27, the cylinder sleeve inner diameter measuring device corresponding to the position of the outer V-shaped groove is selected to calibrate the base 5, and the circular bulge in the middle of the three-jaw base 1 is arranged in the circular groove in the cylinder sleeve inner diameter measuring device calibration base 5. After the installation is finished, the whole device is put into a three-coordinate measuring instrument for measurement, and the circle center of a circular bulge in the middle of the three-jaw base is set as O3And the measuring device for the inner diameter of the cylinder sleeve calibrates the circular groove in the base 5The circle center coincides with the circle center of the three-jaw base 1, the laser emitted by the 3 laser ranging sensors 3 irradiates on the inner wall of the calibration base of the cylinder sleeve inner diameter measuring device to generate 3 light spots, and the 3 light spots are respectively set as P31，P32，P33And the positions of the 3 laser ranging sensors are Q31，Q32，Q33Respectively measured by a three-coordinate measuring instrument to obtain P31，P32，P33The coordinates of the 3 points are respectively P31(a31，b31)，P32(a32，b32)，P33(a33，b33) In the plane, 3 points not on a straight line can define a circle, according to P31，P32，P33The 3 point coordinates can calculate the center O of the circular bulge at the middle part of the three-jaw base 13Coordinates, calculated as O3(a2，b2). Are respectively connected with O3And P31、O3And P32、O3And P33A total of 3 straight lines, each L31，L32，L33Wherein Q is31In a straight line L31Upper, Q32In a straight line L32Upper, Q33In a straight line L33The above. Based on the above coordinate values, O can be calculated3P31、O3P32、O3P33Length, as shown in the following formula:
reading the values of the three laser distance measuring sensors 3 respectively and recording the values as c31，c32，c33Where c is31，c32，c33Respectively corresponding to Q31P31、Q32P32、Q33P33Can be calculated to obtain the target calibration value S31：O3Q31、S32：O3Q32、S33：O3Q33As shown in the following formula:
S31＝O3Q31＝O3P31-Q31P31
S32＝O3Q32＝O3P32-Q32P32
S33＝O3Q33＝O3P33-Q33P33
so as to obtain the position S of the middle V-shaped groove31、S32、S33。
2. Cylinder liner internal diameter measurement
When measuring the cylinder sleeve with the diameter range of 200-255mm, adjusting the gear shifting handle 27 to the position of an inner V-shaped groove, then putting the target measurement cylinder sleeve into a numerical control machine tool, taking the magnetic base as a connecting piece, adsorbing the adsorption end of the magnetic base to the circular bulge at the bottom of the three-jaw base 1, installing the fixed end of the magnetic base on a tool rest, wherein the purpose of the magnetic base is to install the measuring device on the machine tool, adjusting the position of the device through machine tool program control, enabling the center of the three-jaw base to reach the theoretical axis of the cylinder sleeve, then controlling the whole device to descend to the height of the inner diameter of the cylinder sleeve to be measured, measuring the inner diameter size of the cylinder sleeve in real time, and respectively reading the reading c of the detection value of the three laser ranging1，c2，c3，
3. Cylinder liner inside diameter calculation
Using the circle center O of the cylinder sleeve inner diameter measuring device as an origin, OP1The line is taken as the X axis, and the through origin is perpendicular to the OP1Defining the straight line to the right as Y axis, and calibrating value S according to selected gear1、S2、S3Three spots P can be calculated1、P2、P3Length to origin OP1、OP2、OP3Due to OP1、OP2、OP3The three straight lines are uniformly distributed at 120 degrees and all pass through the origin, and then the coordinate values P of the three light spots can be calculated1(a1，b1)，P2(a2，b2)，P1(a3，b3) Wherein:
a1＝OP1，b1＝0
the radius of a circle can be calculated by knowing three points on the edge of the circle, so that the inner diameter of the cylinder sleeve at the position can be calculated, the diameters of different depths can be measured along with the movement of the whole measuring device, the height of the cutter frame is kept to enable the cutter frame to rotate around the theoretical axis of the cylinder, and the inner diameter jump of the cylinder sleeve at the height can be measured.
The cylinder sleeve measuring diameter ranges of 250-310mm and 310-360mm are the same as above.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. A measuring method of a cylinder sleeve inner diameter measuring device is characterized in that: the method comprises the following steps:
(1) the method comprises the following steps of constructing a cylinder sleeve inner diameter measuring device which comprises three-jaw type bases, namely a first base, a second base and a third base, wherein each base is provided with a linear guide rail, each linear guide rail is provided with a sliding block which slides along the linear guide rail, each sliding block is provided with a sensor mounting plate, the outer end of each sensor mounting plate is provided with a laser ranging sensor, one side of each sensor mounting plate is provided with at least two V-shaped grooves, one side of each V-shaped groove on each base is provided with a ball plunger fixing block, a ball plunger is mounted on each ball plunger fixing block, and the center of each three-jaw type base is provided with a;
(2) the position calibration of the V-shaped groove specifically comprises the following steps:
3 sensor mounting panels have been used altogether in this device, all processed 3V type grooves on each sensor mounting panel, distribute according to 9V type groove positions altogether on 3 sensor mounting panels, divide into groups in 9V type grooves, wherein: the 3V-shaped grooves on the inner side are defined as inner V-shaped grooves, the 3V-shaped grooves in the middle position are defined as middle V-shaped grooves, and the 3V-shaped grooves on the outer side position are defined as outer V-shaped grooves;
firstly, calibrating the position of an inner V-shaped groove, moving a sliding block, adjusting the inner V-shaped groove of a sensor mounting plate to the position of a ball plunger and clamping the inner V-shaped groove, selecting a cylinder sleeve inner diameter measuring device calibration base corresponding to the position of the inner V-shaped groove, and installing a circular bulge in the middle of a three-jaw base into a circular groove in the cylinder sleeve inner diameter measuring device calibration base; after the installation is finished, the whole device is put into a three-coordinate measuring instrument for measurement, and the circle center of a circular bulge in the middle of the three-jaw base is set as O1The circle center of a circular groove in the calibrating base of the cylinder sleeve inner diameter measuring device coincides with the circle center of the three-jaw base, laser emitted by the 3 laser ranging sensors irradiates the inner wall of the calibrating base of the cylinder sleeve inner diameter measuring device to generate 3 light spots, and the 3 light spots are respectively set as P11，P12，P13And the positions of the 3 laser ranging sensors are Q11，Q12，Q13Respectively measured by a three-coordinate measuring instrument to obtain P11，P12，P13The coordinates of the 3 points are respectively P11(a11，b11)，P12(a12，b12)，P13(a13，b13) In the plane, 3 points not on a straight line can define a circle, according to P11，P12，P13The 3 point coordinates can be calculated in the three-jaw type baseCenter O of the circular bulge1Coordinates, calculated as O1(a1，b1) Are each connected to O1And P11、O1And P12、O1And P13A total of 3 straight lines, each L11，L12，L13Wherein Q is11In a straight line L11Upper, Q12In a straight line L12Upper, Q13In a straight line L13In the above, O can be calculated from the coordinate values1P11、O1P12、O1P13Length, as shown in the following formula:
respectively reading the values of the three laser ranging sensors and recording the values as c11，c12，c13Where c is11，c12，c13Respectively corresponding to Q11P11、Q12P12、Q13P13Can be calculated to obtain the target calibration value S11：Q1Q11、S12：Q1Q12、S13：Q1Q13As shown in the following formula:
S11＝O1Q11＝O1P11-Q11P11
S12＝O1Q12＝O1P12-Q12P12
S13＝Q1Q13＝O1P13-Q13P13
so as to obtain the position S of the inner V-shaped groove11、S12、S13；
The corresponding position S of the middle V-shaped groove can be obtained in the same way21、S22、S23；
Outer V-groove position S31、S32、S33；
(3) Measuring the inner diameter of the cylinder sleeve, specifically:
according to target measurement cylinder jacket internal diameter theoretical dimension, make target cylinder jacket internal diameter theoretical dimension in this V type groove gear measuring range, put into the digit control machine tool with target measurement cylinder jacket afterwards, as the connecting piece through the magnetism base, adsorb the circular arch of magnetism base on the absorption end of magnetism base to three-jaw base bottom, install the stiff end of magnetism base on the cutter frame, adjust three-jaw base position through machine tool program control, make the center of three-jaw base reach on the cylinder jacket theoretical axis, control integrated device and descend to the inside height that needs to carry out the measurement internal diameter of cylinder jacket after that, measure cylinder jacket internal diameter dimension in real time, can read three laser rangefinder sensor detected value reading c reading respectively1，c2，c3；
(4) Calculating the inner diameter of the cylinder sleeve specifically as follows:
using the circle center O of the cylinder sleeve inner diameter measuring device as an origin, OP1The line is taken as the X axis, and the through origin is perpendicular to the OP1Defining the straight line to the right as Y axis, and calibrating value S according to selected gear1、S2、S3Three spots P can be calculated1、P2、P3Length to origin OP1、OP2、OP3Due to OP1、OP2、OP3The three straight lines are uniformly distributed at 120 degrees and all pass through the origin, and then the coordinate values P of the three light spots can be calculated1(a1，b1)，P2(a2，b2)，P1(a3，b3) Wherein:
a1＝OP1，b1＝0
knowing three points on the edge of the circle, the radius of the circle can be calculated, and the size of the inner diameter of the cylinder liner at the position can be calculated.
2. The measuring method of the cylinder liner inner diameter measuring apparatus according to claim 1, characterized in that: and (2) a gear shifting handle is installed at the other end of the sensor installation plate in the step (1).
3. The measuring method of the cylinder liner inner diameter measuring apparatus according to claim 1, characterized in that: and (2) a protective cover is arranged on the three-jaw type base in the step (1).
4. The measuring method of the cylinder liner inner diameter measuring apparatus according to claim 1, characterized in that: and (2) in the step (1), the ball plunger is installed on the ball plunger fixing block through threads.
5. The measuring method of the cylinder liner inner diameter measuring apparatus according to claim 1, characterized in that: in the step (1), three V-shaped grooves are distributed on the sensor mounting plate at equal intervals.
6. The measuring method of the cylinder liner inner diameter measuring apparatus according to claim 1, characterized in that: and (2) arranging a limiting hole on the base in the step (1), and installing a limiting pin in the limiting hole.
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| CN108692666B (en) * | 2018-03-28 | 2020-04-10 | 郑州郑大智能科技股份有限公司 | Cylinder jacket internal diameter detection device |
| CN110260807B (en) * | 2019-07-25 | 2021-06-18 | 中国人民解放军海军工程大学 | Calibration and use method of marine floating raft vibration isolator spacing monitoring detection base |
| CN110779488B (en) * | 2019-10-31 | 2021-06-22 | 湖北民族大学 | Self-adaptive measuring system for measuring distance of overall dimension parameters of steel and control method |
| CN110763145A (en) * | 2019-11-28 | 2020-02-07 | 兖矿集团有限公司 | Diameter-variable inner wall scanning instrument for cylinder body |
| CN111879247B (en) * | 2020-08-03 | 2022-05-20 | 海伯森技术（深圳）有限公司 | Device for measuring specification of shaft hole |
| CN113587830B (en) * | 2021-08-03 | 2022-08-23 | 上海柏酷信息技术有限公司 | Device and method for measuring inner diameter of circular hole at non-contact 3 points |
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