CN106338229B - A method of measuring workpiece profile - Google Patents
A method of measuring workpiece profile Download PDFInfo
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- CN106338229B CN106338229B CN201610644320.XA CN201610644320A CN106338229B CN 106338229 B CN106338229 B CN 106338229B CN 201610644320 A CN201610644320 A CN 201610644320A CN 106338229 B CN106338229 B CN 106338229B
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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
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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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
- G01B5/0025—Measuring of vehicle parts
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a kind of methods measuring workpiece profile, it first puts the workpiece on detection auxiliary clamp and is deviated outward in obtained positioning chamber by the design outer contour of workpiece, and it is positioned by corresponding detent mechanism, each measurement point on workpiece forms corresponding test point on positioning chamber, then the vertical measuring rod that can be moved forward and backward in measuring device is located at the test point of detection auxiliary clamp, then measuring rod is moved forward, against the measurement point of workpiece, the scale practical displacement distance of measuring rod shown and the test point of positioning chamber of reading detection auxiliary clamp correspond to the difference between the theoretical deviant of measurement point relative to workpiece, as size deviation value of the workpiece in the measurement point, and then judge whether gap of the workpiece when mounted between adjacent workpieces meets design requirement.The configuration of the present invention is simple is at low cost, and measurement result is not necessarily to complicated calculations, is suitable for the on-line checking to large-scale workpiece profile.
Description
Technical field
The present invention relates to the measuring techniques in mechanical processing and manufacturing process, more particularly, to a kind of special large-scale work of measurement
The method of part face profile.
Background technology
In automobile production and manufacturing process, need to process the larger workpiece of some appearance and sizes, it is most in such workpiece
It is not completed by the digital control processing of Large Machining Center, is completed using techniques such as metal plate punchings, therefore its
The appearance profile of finished product is susceptible to deviation, thus, it would be desirable to measure the appearance profile of the workpiece machined.Due to above-mentioned
The appearance and size of workpiece is larger, therefore the survey tool of slide calliper rule one kind can not be used directly to be measured.In the prior art,
People usually measure the profile of workpiece by the following two kinds method：One is measured on profile by large-scale three-coordinates measuring machine
The coordinate of each test point, for example, disclosed " a kind of three coordinate measuring machine ", Publication No. in Chinese patent literature
CN104019778A, but such three-coordinates measuring machine there are it is complicated, expensive, be not easy to promote the use of it is thus uncomfortable
The problems such as closing on-line measurement, and its measurement result is only merely the coordinate value of test point, it is difficult to it directly embodies and is respectively examined on profile
The deviation of measuring point convex or concave, therefore between can not rapidly judging the workpiece when vehicle is installed between adjacent workpieces
Whether gap meets design requirement.Another kind be the appearance profile of workpiece is obtained using digital scan or digital camera technology, for example,
Disclosed one kind " cross section profile measurer ", Publication No. CN101403605A comprising be fixed in Chinese patent literature
Line-structured light generator, video camera on one horizontal base, the angle of line-structured light projecting direction and camera light axis direction
It is spent in range at 30 degree -35, the distance of the lightening hole of line-structured light generator to video camera image plane center is in 85mm -95mm models
In enclosing.When measurement, the line-structured light plane that line-structured light generator projects mutually surrenders a very bright profile with testee
The contour line photographed is converted to image coordinates and exported, image coordinates is updated to according to video camera perspective imaging by line, video camera
The two-dimensional coordinate i.e. 2-D data of cross section profile in structure light smooth surface coordinate system can be obtained in the formula that principle is established, it can be real
The non-cpntact measurement of existing cross section profile.Such measurement method has the advantages that measurement accuracy and measurement efficiency are high, and can pass through
Corresponding software calculates the deviation for directly obtaining each test point convex or concave on profile, but still there are complicated, valences
Lattice are expensive, be not easy to promote the use of thus the problems such as being not suitable for on-line measurement.
Invention content
The purpose of the present invention is to solve complicated, the prices present in the existing method for measuring workpiece profile to hold high
The problem of expensive, unsuitable on-line measurement, provides a kind of method of the measurement workpiece profile of simplicity, the measuring device structure used
It is simple at low cost, thus suitable for automobile making factory to the on-line checking of large-scale workpiece profile, and measurement result is without multiple
Miscellaneous calculating can determine whether gap of the workpiece when vehicle is installed between adjacent workpieces meets design requirement.
To achieve the goals above, the present invention uses following technical scheme：
A method of workpiece profile is measured, is included the following steps：
Include the following steps：
A. several measurement points are determined on the design outer contour of workpiece；
B. by the design outer contour of the workpiece, one measurement offset of offset is worth to shift wheel profile and institute outward
State the one-to-one test point of measurement point；
C. it is detected at one and processes a positioning chamber according to the offset contour line on the upper surface of auxiliary clamp：
D. positioning in the positioning chamber is put the workpiece in, at the edge of the outer ledge and the positioning chamber of workpiece
Between formed a measurement gap；
E. by one there is the measuring device of moveable vertical measuring rod to be placed into the upper of the detection auxiliary clamp
On surface, the lower end of the measuring rod is stretched into the corresponding measurement gap of first test point；
F. the measuring rod is moved along normal direction of the positioning chamber at first test point, makes the measurement
Bar bears against the positioning chamber inner sidewall and workpiece lateral wall, and the displacement distance of the measuring rod and the measurement are deviated
Value compares, you can obtain workpiece first measurement point size deviation value；
G. step e, f is repeated, and correspondingly adjusts serial number therein, you can obtains each measurement point on workpiece successively
Size deviation value, to judge whether the workpiece meets design requirement.
The mode that the present invention first passes through digital control processing makes the detection auxiliary clamp of a standard, is needed to place and to position
The workpiece to be measured, due to offset contour line cutting at test point corresponding on positioning chamber on front side of the measuring rod for measurement
Line is tangent, and therefore, measuring rod front side forms with offset contour line at the test point tangent.Pass through what measurement obtained by calculating
The practical displacement distance of measuring rod and the sum of the diameter of measuring rod, then be compared and obtain with the measurement deviant being previously set
One deviation value, you can obtain workpiece in the actual error of measurement point, and then judge the workpiece in general assembly and adjacent workpieces
Between gap whether meet design requirement.In particular, when measuring device navigates on the upper surface of detection auxiliary clamp, erect
The measuring rod being directly arranged is perpendicular to the upper surface of detection auxiliary clamp, it can thus be ensured that the accuracy measured, avoids using slide calliper rule
When the survey tool hand dipping of one kind measurement accuracy is influenced because the claw of slide calliper rule tilts.
Preferably, the measuring device includes ontology, there are one supporting plane, the measurements for the lower part tool of the ontology
The supporting plane is stretched out in the lower end of bar, on the ontology setting can show the displacement distance of measuring rod scale and can locking
The lockable mechanism of the measuring rod.
The initial position and the final position after movement that measuring rod can be locked at scale by lockable mechanism, in this way, we
Only need to be by observing and measuring bar corresponding scale label at two positions, you can efficiently and easily obtain the movement of measuring rod away from
From.
Preferably, the madial wall top edge of the positioning chamber correspond to each test point position respectively process positioning it is recessed
Slot, in step e, measuring rod lower end screens is in the positioning groove, at this time on the measuring rod and the positioning chamber
Tangent line of the corresponding offset contour line at first test point is tangent.
Since the screens of measuring rod lower end is in the positioning groove, and measuring rod offset profile corresponding on positioning chamber
Tangent line of the line at first test point is tangent, thus we are not necessarily to calculate the diameter of measuring rod, that is to say, that we only need to count
Calculate measuring rod displacement distance and the measurement deviant being previously set between deviation value, you can obtain workpiece measurement point reality
Border error, to be conducive to improve detection efficiency.
Preferably, the positioning groove is V-shaped groove, the slot bottom of the positioning groove is located at the corresponding institute of the positioning groove
It states on the normal at the test point of offset contour line.
The positioning groove and measuring rod of V-arrangement coordinate, and both can ensure that accurate screens of the measuring rod in positioning groove, and have avoided producing
The relative displacement of raw left and right, while convenient for the position dimension of measuring rod after determining positioning, it is ensured that measuring rod after measuring device positioning
Tangent line of the front side of the lower end offset contour line corresponding on positioning chamber at test point is tangent.
Preferably, longitudinal slice bar and transversal flaps bar square crossing structure that the measuring rod is collinearly arranged by longitudinal axis
At the cross section of the longitudinal slice bar assumes diamond in shape, between the corresponding measurement of first test point is stretched into the lower end of the measuring rod
When in gap, the rear side sideline of longitudinal slice bar lower end reclines and screens is in the slot bottom of the positioning groove of V-arrangement, the at this time positioning
Normal of the offset contour line at first test point corresponding to chamber passes through longitudinal slice bar lower end in the measuring rod
Front side sideline.
The cross section being made of longitudinal slice bar and transversal flaps bar square crossing is conducive to improve in the star-shaped measuring rod of cross
The intensity and rigidity of measuring rod, and measurement point on workpiece can be accurately positioned when measuring rod moves forward against workpiece, be conducive to
Improve measurement accuracy.
Preferably, the locating rod is the cylindrical bar perpendicular to the detection datum plane, the side of the ontology
Equipped with the crossbeam extended laterally out, the locating piece is located at the outer end of the crossbeam, and there are one evaginations for the locating piece tool
Cylindrical positioning surface, the axis perpendicular of the axis of the positioning surface and the locating rod, when measuring device needs positioning,
The positioning surface of the locating piece reclines the lateral surface of the locating rod.
Since positioning surface is cylindrical surface, when locating piece reclines locating rod, it can be ensured that it is between the two point contact,
Be conducive to improve its positioning accuracy.
Preferably, the ontology trailing flank is equipped with the sliding groove to extension on front side of ontology, the upper surface of the ontology is set
There is the slot of perforation sliding groove, the cross section of the slot and sliding groove is in cross-shaped, the left and right sides of the sliding groove
It is respectively equipped with the sliding block of strip, the top of the measuring rod is equipped with I-shaped sliding part, and the measuring device is when mounted, first
The measuring rod is injected from top to bottom in the slot, then two pieces of sliding blocks are inserted into the left and right sides of the sliding groove
And screens is slidably connected in the recess of the sliding part both sides to make the measuring rod be constituted with the sliding groove.
When being inserted into two pieces of sliding blocks in sliding groove, that is, the I-shaped slot being adapted to the sliding part of measuring rod is constituted, both favorably
In the positioning up and down of measuring rod, while convenient for the processing of sliding groove and the assembly of measuring rod.
Preferably, being equipped with the locking threaded hole for penetrating through the sliding groove and tight at left and right sides of the body upper part
Gu screwing through hole, the locking threaded hole is interior to be equipped with locking screw, is equipped in the trip bolt through-hole and is threadedly coupled with sliding block
Trip bolt first unclamp trip bolt when needing measuring rod described in locking, then tighten locking screw, make locking screw
Screw thread one end against sliding block, the sliding block stands tightly against the sliding part of the measuring rod and by the measuring rod locking；When need
When moving the measuring rod, the locking screw is first unclamped, then tightens the trip bolt, the sliding block is made to be fastened on cunning
In dynamic slot, you can the sliding part of the measuring rod is made to be slidably connected with sliding block formation.
Trip bolt plays the role of pulling sliding block, thus sliding block can be fixed in sliding groove.On the contrary, locking screw
It can then play the role of pushing sliding block, thus can easily by measuring rod clamping and be locked between two sliding blocks.
Therefore, the present invention has the advantages that：It is simple in structure at low cost, it is suitable for automobile making factory to large-scale work
The on-line checking of part profile, and measurement result can determine whether the workpiece when vehicle is installed and adjacent workpieces without complicated calculations
Between gap whether meet design requirement.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram when the present invention measures.
Fig. 2 is a kind of structural schematic diagram of measuring device.
Fig. 3 is the transverse sectional view of measuring device.
Fig. 4 is the cross-sectional view of measuring rod.
In figure：1, workpiece 11, measurement point 2, detection auxiliary clamp 21, detection datum plane 22, positioning chamber 23, fixed
Position groove 24, measuring device 31, ontology 311, vertical section 312, traversing section 313, supporting plane 314, is slided locating rod 3
Dynamic slot 315, slot 316, crossbeam 317, locating piece 32, measuring rod 3212, sliding part 322, longitudinal slice bar 323, transverse direction
Piece bar 33, sliding block 34, scale 35, locking threaded hole 36, trip bolt through-hole 37, locking screw 38, trip bolt.
Specific implementation mode
The present invention will be further described with specific implementation mode below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of method measuring workpiece profile, specifically comprises the following steps：
A. several measurement points 11 are determined on the design outer contour of workpiece 1.Preferably, measurement point 11 should be arranged straight
It, should be at least in head and the tail and centre for longer straight line and camber line at the boundaries such as line and circular arc, straight line and straight line and turning point
Three measurement points are arranged in position；
B., the design outer contour of workpiece 1 is equably deviated to a measurement deviant outward, to obtain an offset
Contour line, and determined and the one-to-one several test points of the measurement point 11 on the offset contour line.It needs to illustrate
It is that measure deviant can be integer, in order to calculate, process and subsequent measurement, and offset described herein refers to that will set
Point on meter outer contour is displaced outwardly the measurement deviant of a setting along design outer contour in the normal direction of the point.
In addition, we are the corresponding corresponding sequence of test point setting on each measurement point and the offset contour line designed on outer contour
Number, serial number is incremented by one by one since first；
C. a detection auxiliary clamp 2 is made, in order to place and position the workpiece 1 for needing to measure.The detection additional lock
The top of tool 2 is horizontal detection datum plane 21, and processing one according to offset contour line on detection datum plane 21 determines
Then the side wall of position chamber 22, the positioning chamber processes in positioning chamber 22 for positioning workpiece perpendicular to detection datum plane 21
Detent mechanism, and each test point position for corresponding in the side wall top edge of positioning chamber 22 offset contour line process respectively it is fixed
Position groove 23.It is located at the installation of small cone in export processing is big at the side of positioning groove 23 on detection datum plane 21
Then locating rod 24 is installed in hole in mounting hole.Specifically, detent mechanism can be on workpiece positioning fabrication hole or
The simple positioning pin or positioning protrusion of the adaptations such as mounting hole；And the hypomere of locating rod is the cone being adapted to mounting hole
Construction section, to be conducive to the accurate centering positioning of locating rod, the epimere of locating rod is the positioning section of cylinder, it is ensured that above and below it
Size it is consistent.It should be noted that positioning chamber 22, positioning groove 23, mounting hole and detent mechanism on detection auxiliary clamp 2
Processing can Continuous maching be completed after primary clamping on numerical control machine tool, to avoid the opposite mistake generated by multiple clamping
The serial number of difference, positioning groove 23 and locating rod 24 is consistent with the serial number of aforementioned test point；
D. a measuring device 3 is made, as shown in Figure 2 and Figure 3, the measuring device 3 is including an ontology 31 and vertically
The measuring rod 32 of ground setting on the body.Ontology 31 from the vertical section 311 of lower part and top from the side of vertical section integrally to
Before be laterally extended the traversing section 312 to be formed and constitute, to make ontology be in " 7 " font.For ease of description, we will be on vertical section
Connection traversing section side is defined as the front side of ontology, on the contrary, after the side far from traversing section is defined as ontology on vertical section
Side.The lower face of vertical section 311 is supporting plane 313 on ontology 31, and the trailing flank on 31 top of ontology is arranged to 31 front side of ontology
The sliding groove 314 that extends of traversing section 312, the cross section of sliding groove is rectangular, and perforation sliding is then arranged in the upper surface of ontology 31
The slot 315 of slot 314, the rear and front end closing of slot 315, the width of slot 315 are less than the width of sliding groove 314, slot 315
Bottom surface be less than the bottom surface of sliding groove 314, to make the cross section of slot 315 and sliding groove 314 in ontology 31 be in right-angled intersection
The sliding block 33 of strip is respectively set in the left and right sides of shape, sliding groove 314, and the cross section of sliding block 33 is rectangular, in ontology 31
It is interior to form a cross section in I-shaped sliding cavity.In addition, supporting plane is stretched out in the lower end of measuring rod 32 after extending downwardly
313, the top setting cross section of measuring rod 32 is in I-shaped sliding part 321, the height and cunning of the groove of 321 both sides of sliding part
The height of block 33 is adapted.Measuring device 3 when mounted, first injects measuring rod 32 in slot 315, and make measurement from top to bottom
Bar 32 is located at the rear end of slot 315, and certainly, I-shaped 321 width of sliding part in 32 top of measuring rod should be less than the width of slot 315
Then two pieces of sliding blocks 33 are inserted into the left and right sides of sliding groove 314,33 half screens of sliding block at this time by degree from the rear side of ontology 31
In sliding groove 314, then screens is in the groove of 321 both sides of sliding part of measuring rod 32 for the other half, to make measuring rod 32
Sliding part 321 is slidably connected with two pieces of sliding blocks 33 composition in sliding groove 314, and measuring rod 32 can be along the side of supporting plane 313
It moves forwards, backwards.In addition, scale 34 is arranged in the both sides that we need to also be located at slot 315 in the upper surface of ontology 31, so as to quick
Ground shows the displacement distance of measuring rod 32.And the locking spiral shell of setting perforation sliding groove 314 is both needed at left and right sides of 31 top of ontology
Pit 35 and trip bolt through-hole 36, locking threaded hole 35 is interior to be arranged locking screw 37, to make 37 screw thread of locking screw connect
It is connected on ontology 31, trip bolt 38 is then set in trip bolt through-hole 36, correspondingly, sliding block 33 is in corresponding trip bolt 38
Position is threaded hole, and trip bolt 38 is connected to across 36 rear thread of trip bolt through-hole in the threaded hole of sliding block 33.Finally,
The crossbeam 316 extended laterally out is set on the right side of ontology 31, and one locating piece 317 is set in the outer end of crossbeam 316,
There are one the cylindrical positioning surface of evagination, the axis horizontal settings of the positioning surface for tool on locating piece 317.
E. the workpiece 1 detected will be needed to be put into the positioning chamber 22 of detection auxiliary clamp 2, and passes through localization machine above-mentioned
Structure makes workpiece position, to form a gap between the outer ledge and the edge of positioning chamber 22 of workpiece 1；
F. the trip bolt 38 on ontology 31 is unclamped, locking screw 37 is then tightened, locking screw 37 is made to be located at locking spiral shell
Tightly against sliding block 33, the sliding block 33 of 32 sliding part of measuring rod, 321 both sides stands tightly against measurement for screw thread one end in pit 35
For the sliding part 321 of bar 32 to which measuring rod 32 to be locked on ontology 31, measuring rod 32 at this time is in initial position, Wo Mensui
Read the corresponding indicating value on scale 34 of measuring rod 32.Then the measuring device 3 is placed on detection auxiliary clamp 2, is made
The supporting plane 313 of measuring device 3 and the detection datum plane 21 of detection auxiliary clamp 2 fit, and measuring rod 32 is made to stretch
Go out the lower end screens of supporting plane 313 in first positioning groove 23 that positioning chamber 22 corresponds to first test point, surveys at this time
Recline the slot bottom of first positioning groove 23 on rear side of 32 lower end of gauge rod, then with the patch of measuring rod 32 lower end and positioning groove 23
Chalaza is axis oscillating measuring device 3, so that the positioning surface of the locating piece 317 in measuring device 3 is reclined and is located in first calmly
On 24 lateral surfaces of first locating rod on 23 side of position groove, since the axis of positioning surface and the axis of locating rod 24 mutually hang down
Directly, therefore between locating piece 317 and locating rod 24 point contact is formed.At this time the front side of 32 lower end of measuring rod then on positioning chamber 22
Tangent line of the corresponding offset contour line at first test point is tangent, and the movable direction of measuring rod 32 and positioning chamber 22
Normal direction of the upper corresponding offset contour line at first test point overlaps so that measuring rod 32 can be along offset contour line
Normal direction movement at first test point.For the ease of processing and ensuring accurate positioning, we can be by positioning groove 23
V-shaped groove is made, and the slot bottom sharp corner of positioning groove 23 is made to be located just at the corresponding offset contour line of the positioning groove 23
On normal at test point.In addition, as shown in figure 4, longitudinal slice bar 322 that measuring rod 32 is collinearly arranged by longitudinal axis and laterally
Integrally square crossing is constituted piece bar 323, and the cross section of longitudinal slice bar 322 assumes diamond in shape, to make the cross section of measuring rod 32 be in
Cross star, that is to say, that measuring rod 32 is rod piece made of a cross star cross section stretches.In this way, working as 32 lower end of measuring rod
When navigating in positioning groove 23, the rear side sideline of 322 lower end of longitudinal slice bar reclines in measuring rod 32 and screens is fixed at first
The slot bottom of position groove 23V shapes, and normal of the offset contour line at first test point corresponding to positioning chamber 22 then passes through institute
State the front side sideline of 322 lower end of longitudinal slice bar in measuring rod 32.In addition, for the ease of measuring device 3 in detection auxiliary clamp 2
The reliable location on datum plane 21 is detected, a magnetic absorbing seat can be arranged in 31 lower part of ontology of measuring device 3 in we, in this way,
When measuring device be placed into detection datum plane on, and by positioning groove and locating rod positioning after, only need to rotate on magnetic absorbing seat
Switch knob, you can by 3 strong fix of measuring device detection datum plane 21 on；
G. locking screw 37 is unclamped, trip bolt 38 is then tightened, so that sliding block 33 is fastened in sliding groove 314, survey at this time
The sliding part 321 of gauge rod 32 is re-formed with sliding block 33 to be slidably connected.Then measuring rod 32 is pushed, makes measuring rod 32 to Forward
Dynamic, until the front side sideline and the edge of workpiece 1 of 32 lower end of measuring rod fit, measuring rod 32 at this time is in final position,
We read the corresponding indicating value on scale 34 at this time of measuring rod 32 immediately, and calculate the indicating value and the obtained measurements of step f
Difference of the bar 32 at initial position between the indicating value of scale 34, you can 32 forward displacement distance of measuring rod is obtained, by the movement
Distance subtracts measurement deviant and can be obtained size deviation value of the workpiece 1 at corresponding first measurement point 11, when above-mentioned size
When deviation value is positive number, indicates the deviation value of the indent compared with designing outer contour at first measurement point 11 of workpiece 1, work as ruler
When very little deviation value is negative, the deviation value of the evagination compared with designing outer contour at first measurement point 11 of workpiece 1 is indicated.It needs
It is noted that we can by the zero indicating value of scale 34 be arranged measuring rod 32 move forward one measure deviant apart from when
Corresponding position, and 34 indicating value of corresponding scale at initial position of measuring rod 32 is positive number, for example, measurement deviant is
When 5mm, when measuring rod 32 is in the initial position of the rear end of slot 315, the indicating value of scale 34 is 5mm, when measuring rod 32 to
When preceding movement one measures deviant distance 5mm, the indicating value of scale 34 is 0mm, when measuring rod 32 moves forward 6mm, scale
34 indicating value is -1mm, that is to say, that the positive indicating value of scale 34 indicates that workpiece 1 is outer with design at first measurement point 11
Contour line compares the deviation value of evagination, and the negative indicating value of scale 34 indicates that workpiece 1 is outer with design at first measurement point 11
Contour line compares the deviation value of indent, so as to save calculating step, saves time of measuring；
H. step f and step g is repeated, and correspondingly adjusts serial number therein, you can is obtained successively corresponding on workpiece 1
The size deviation value of each measurement point 11 on the outer contour, to judge whether the workpiece meets design requirement.For example, working as me
Need measure workpiece on second measurement point size deviation value when, serial number is 2, correspondingly, in step f and step g
First test point, first positioning groove, the statements such as first locating rod be adjusted to second test point, second positioning
Groove, second locating rod.
Claims (7)
1. a kind of method measuring workpiece profile, characterized in that include the following steps：
A. in workpiece（1）Design outer contour on determine several measurement points（11）；
B. by the workpiece（1）Design outer contour outward offset one measure offset be worth to shift wheel profile, with it is described
Measurement point（11）One-to-one test point；
C. auxiliary clamp is detected at one（2）Upper surface on according to the offset contour line process a positioning chamber（22）：
D. by workpiece（1）It is put into the positioning chamber（22）Interior positioning, in workpiece（1）Outer ledge and the positioning chamber
（22）Edge between formed a measurement gap；
E. there is moveable vertical measuring rod by one（32）Measuring device（3）It is placed into the detection auxiliary clamp
（2）Upper surface on, the measuring rod（32）Lower end stretch into the corresponding measurement gap of first test point；
F. along the positioning chamber（22）Normal direction at first test point moves the measuring rod（32）, make described
Measuring rod（32）Bear against the positioning chamber（22）Madial wall and workpiece（1）Lateral wall, by the measuring rod（32）Shifting
Dynamic distance is compared with the measurement deviant, you can obtains workpiece（1）In first measurement point（11）The size deviation value at place；
G. step e, f is repeated, and correspondingly adjusts serial number therein, you can obtains workpiece successively（1）Upper each measurement point（11）
Size deviation value, to judge the workpiece（1）Whether design requirement is met；
The measuring device（3）Including ontology（31）, the ontology（31）Lower part tool there are one supporting plane（313）, described
Measuring rod（32）Lower end stretch out the supporting plane（313）, the ontology（31）Upper setting can show measuring rod（32）Shifting
The scale of dynamic distance（34）And it can measuring rod described in locking（32）Lockable mechanism, the ontology（31）Trailing flank is equipped with to this
Body（31）The sliding groove that front side extends（314）, the ontology（31）Upper surface be equipped with perforation sliding groove（314）Slot
（315）, the slot（315）With sliding groove（314）Cross section be in cross-shaped, the sliding groove（314）Left and right two
Side is respectively equipped with the sliding block of strip（33）, the measuring rod（32）Top be equipped with I-shaped sliding part（321）, the measurement
Device（3）When mounted, first by the measuring rod（32）The slot is injected from top to bottom（315）It is interior, it then will be described in two pieces
Sliding block（33）It is inserted into the sliding groove（314）The left and right sides and screens in the sliding part（321）The recess of both sides, to
Make the measuring rod（32）With the sliding groove（314）Composition is slidably connected.
2. a kind of method measuring workpiece profile according to claim 1, characterized in that the ontology（31）Side also
Equipped with locating piece（317）, in the detection auxiliary clamp（2）Upper surface be located at each test point side and be respectively equipped with locating rod
（24）, when the measuring device（3）It is placed into the detection auxiliary clamp（2）Upper surface on when, the locating piece（317）Patch
By the locating rod（24）, to make the measuring device（3）Positioning.
3. a kind of method measuring workpiece profile according to claim 1, characterized in that in the positioning chamber（22）It is interior
Side wall top edge corresponds to each test point position and processes positioning groove respectively（23）, in step e, the measuring rod（32）Lower end
Screens is in the positioning groove（23）It is interior, the measuring rod at this time（32）With the positioning chamber（22）The upper corresponding shift wheel
Tangent line of the profile at first test point is tangent.
4. a kind of method measuring workpiece profile according to claim 3, characterized in that the positioning groove（23）For V
Shape slot, the positioning groove（23）Slot bottom be located at the positioning groove（23）At the test point of the corresponding offset contour line
On normal.
5. a kind of method measuring workpiece profile according to claim 4, characterized in that the measuring rod（23）By longitudinal direction
The longitudinal slice bar of axis collinear arrangement（322）With transversal flaps bar（323）Square crossing is constituted, the longitudinal slice bar（322）Cross
Section assumes diamond in shape, when the measuring rod（32）Lower end when stretching into the corresponding measurement gap of first test point, the longitudinal direction
Piece bar（322）The rear side sideline of lower end recline and screens V-arrangement positioning groove（23）Slot bottom, the positioning chamber at this time（22）
Normal of the corresponding offset contour line at first test point passes through the measuring rod（32）Middle longitudinal slice bar（322）
The front side sideline of lower end.
6. a kind of method measuring workpiece profile according to claim 2, characterized in that the locating rod（24）It is vertical
In the detection datum plane（21）Cylindrical bar, the ontology（31）Side be equipped with the crossbeam that extends laterally out
（316）, the locating piece（317）Positioned at the crossbeam（316）Outer end, the locating piece（317）There are one the circles of evagination for tool
Cylindrical positioning surface, the axis of the positioning surface and the locating rod（24）Axis perpendicular, work as measuring device（3）It is fixed to need
When position, the locating piece（317）Positioning surface recline the locating rod（24）Lateral surface.
7. a kind of method measuring workpiece profile according to claim 1, characterized in that the ontology（31）The left side on top
Right both sides are equipped with the perforation sliding groove（314）Locking threaded hole（35）And trip bolt through-hole（36）, the locking
Threaded hole（35）It is interior to be equipped with locking screw（37）, the trip bolt through-hole（36）It is inside equipped with and sliding block（33）What is be threadedly coupled is tight
Gu screw（38）, when needing measuring rod described in locking（32）When, first unclamp trip bolt（38）, then tighten locking screw
（37）, make locking screw（37）Screw thread one end against sliding block（33）, the sliding block（33）Stand tightly against the measuring rod（32）
Sliding part（321）And by the measuring rod（32）Locking；When need move the measuring rod（32）When, first unclamp the locking
Screw（37）, then tighten the trip bolt（38）, make the sliding block（33）It is fastened on sliding groove（314）It is interior, you can to make institute
State measuring rod（32）Sliding part（321）With the sliding block（33）Formation is slidably connected.
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| CN107167066A (en) * | 2017-07-10 | 2017-09-15 | 中冶建工集团有限公司 | Degree of plainness for wall surface measuring scale |
| CN107966082A (en) * | 2017-11-27 | 2018-04-27 | 宁波邦盛汽车零部件有限公司 | A kind of cubing for being used to detect automobile curved surface part surface profile |
| CN108444354B (en) * | 2018-05-09 | 2023-07-18 | 金华万丰工具厂 | Simple ruler for woodworking |
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| CN110906893B (en) * | 2019-12-19 | 2022-01-04 | 宁波江丰电子材料股份有限公司 | Ring piece three-coordinate detection tool and measurement method and application using same |
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| CN111765836B (en) * | 2020-07-15 | 2022-04-19 | 东莞宇龙通信科技有限公司 | Radian detection device |
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