CN102141393B - Method for detecting deviation of shaft-like part from reference gravity center line on basis of gas suspension and three-dimensional coordinate and gas suspension device - Google Patents
Method for detecting deviation of shaft-like part from reference gravity center line on basis of gas suspension and three-dimensional coordinate and gas suspension device Download PDFInfo
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- CN102141393B CN102141393B CN 201010609737 CN201010609737A CN102141393B CN 102141393 B CN102141393 B CN 102141393B CN 201010609737 CN201010609737 CN 201010609737 CN 201010609737 A CN201010609737 A CN 201010609737A CN 102141393 B CN102141393 B CN 102141393B
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- 230000005484 gravity Effects 0.000 title claims abstract description 27
- 239000000725 suspension Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000001052 transient effect Effects 0.000 claims description 16
- 244000062793 Sorghum vulgare Species 0.000 claims description 14
- 235000019713 millet Nutrition 0.000 claims description 14
- 210000002683 foot Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004579 marble Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a method for detecting the deviation of a shaft-like part from a reference gravity center line on basis of gas suspension and three-dimensional coordinates and a gas suspension device. The gas suspension device comprises a bottom plate, adjustable supporting pins are arranged below the bottom plate, at least two supporting blocks are arranged on the bottom plate, supporting grooves are arranged on the supporting blocks, and gas guide holes are formed at the bottom of the supporting grooves. The method solves the problem of detecting the gravity center of the shaft-like part and other problems are solved by smartly using gas suspension and a three-dimensional detection technique. The structure of the device is simple, the operation of the device is convenient, and the measurement accuracy and repeatability of the device are high.
Description
Technical field
The invention belongs to the detection technique of auto parts and components, be specifically related to a kind of three-dimensional coordinate detection technique of automobile shaft element.
Background technology
Balancing shaft in the engine crankshaft tandem-driving bogie is the vital part of engine crankshaft operation, when tandem-driving bogie gear and axial compression dress, must implement to install according to the transient equilibrium index aperture in the end face start balance mark hole of balancing shaft.Therefore the center of circle of transient equilibrium index aperture must be on the center of gravity line of balancing shaft.Whether the center of circle of transient equilibrium index aperture is difficult to judge on the center of gravity line of balancing shaft in actual production process, and whether the center of circle how to detect the transient equilibrium index aperture is at the center of gravity line of balancing shaft also difficulty very.
Three coordinate measuring machine is widely used in the detection of part three dimensional space coordinate now, and it can detect relevant figure, the parameter of confirming and drawing out three-dimensional objects, and analyze through detecting the D coordinates value of spatial point accurately.It has multiple detection head, as makes core type and the non-core type of making by oneself by oneself; The survey seat of self-centering gauge head and scan function.
Summary of the invention
The object of the present invention is to provide and a kind ofly detect the method and the gas suspension device of axial workpiece and the skew of benchmark center of gravity line, with the detection of realization axial workpieces such as balancing shafves based on gas suspension and three-dimensional coordinate.
The method that detects the skew of axial workpiece and benchmark center of gravity line based on gas suspension and three-dimensional coordinate of the present invention; It is in level reference; Naturally fall behind down after utilizing air pressure that axial workpiece is suspended and support, in first sagittal plane of axial workpiece, gather the coordinate figure of at least three circumference millet cake; Utilize the first central coordinate of circle value of this periphery of coordinate figure calculating of at least three circumference millet cake, confirm first home position; In second sagittal plane of axial workpiece, gather the coordinate figure of at least three circumference millet cake, utilize the second central coordinate of circle value of this circumference of coordinate figure calculating of at least three circumference millet cake, confirm second home position; Connect first center of circle and second center of circle, obtain the axis of axial workpiece, cross the benchmark center of gravity line that axis makes to obtain perpendicular to the vertical line of level reference axial workpiece;
The coordinate figure of at least three circumference millet cake in the transient equilibrium index aperture of collection axial workpiece end face; Utilize the central coordinate of circle value of this transient equilibrium index aperture of coordinate figure calculating of at least three circumferential point; Confirm transient equilibrium index aperture home position; Cross the first tested vertical line of transient equilibrium index aperture center of circle work and axes intersect, relatively the angle of the first tested vertical line and benchmark center of gravity line;
Or gather the teeth groove center point coordinate that axial workpiece cogs, and obtain the position of teeth groove central point, cross the second tested vertical line of teeth groove central point work and axes intersect, relatively the angle of the second tested vertical line and benchmark center of gravity line.
The gas suspension device of detection axial workpiece center of gravity line of the present invention, it comprises base plate, and base plate has adjustable feet, and base plate is provided with at least two back-up blocks, and back-up block is provided with support slot, is provided with gas port at the bottom of the support slot.
Said base plate is provided with level meter.
Said base plate is provided with the horizontal reference plate.
Said gas port is connected with compressed air line.
The present invention utilizes gas suspension and three-dimensional coordinate detection technique dexterously, has solved problems such as existing detection axial workpiece center of gravity line, and it is simple in structure, and from easy to operate, accuracy of measurement and repeatability precision are high.
Description of drawings
Fig. 1 gas suspension apparatus structure synoptic diagram.
Fig. 2 balancing shaft synoptic diagram.
Fig. 3 balancing shaft principle schematic to be detected.
Embodiment
As shown in Figure 1, the gas suspension device comprises base plate 1, and base plate 1 has adjustable feet 2, and the height of feet 2 is through threaded adjusting, and promptly feet 2 is provided with the nut thread adjusting.Four feets 2 can guarantee base plate 1 maintenance level.
Gas suspension device and three coordinate measuring machine are used for the balancing shaft of engine crankshaft tandem-driving bogie as shown in Figure 2 is detected.Among Fig. 2,8 is the balancing shaft axis, and 9 is the gear on the balancing shaft.
During detection:
Gas suspension device fixation is on the marble dull and stereotyped 12 of three coordinate measuring machine.The marble dull and stereotyped 12 of three mark measuring machines has mixed up level by level meter, makes base plate 1 and horizontal reference plate 4 maintenance levels.The survey seat of existing self-centering of the confidential outfit of three-dimensional coordinates measurement and scan function and gauge head (conventional pick-up unit).
At first balancing shaft 10 is placed in the support slot 6 of two back-up blocks 5 in the gas suspension device; After opening source of the gas; Pressurized air suspends balancing shaft 10 get up; The tested part balancing shaft because do not had and anchor clamps between the contact friction resistance, stopping naturally in slight swing back, center of gravity meeting this moment nature down.Turn off source of the gas, balancing shaft 10 freely falls in support slot 6.
Three coordinate measuring machine is equilibrium establishment axle 10 center of gravity line benchmark at first: the gauge head of coordinate measuring machine is gathered not at the coordinate of three points of straight line at horizontal reference plate 4, in three coordinate measuring machine, sets up surface level according to the coordinate of three points.
Three coordinate measuring machine is in the sagittal plane of the A place diameter of axle; Gather the coordinate figure of at least three circumference millet cake, utilize at least three point coordinate on the circumference, can obtain the central coordinate of circle of circumference; Calculate the first central coordinate of circle value of this circumference, confirm first home position;
Three coordinate measuring machine is in the sagittal plane of the C place diameter of axle; Gather the coordinate figure of at least three circumference millet cake, utilize at least three point coordinate on the circumference, can obtain the central coordinate of circle of circumference; Calculate the second central coordinate of circle value of this periphery, confirm second home position; Connect first center of circle and second center of circle, obtain the axis 8 of balancing shaft 10.
The coordinate figure of above-mentioned measurement circumference millet cake can be four or more by the quantity examined, can utilize the principle of coordinate geometry to calculate the coordinate in the center of circle equally.
Cross point on the axis 8 and in three coordinate measuring machine, set up surface level and make perpendicular line, obtain the benchmark center of gravity line 12 of axial workpiece; Shown in Figure 3.
As shown in Figure 3; The coordinate figure of at least three circumference millet cake in the transient equilibrium index aperture 13 of collection balancing shaft 10 end faces; Utilize the central coordinate of circle value of this transient equilibrium index aperture of coordinate figure calculating of at least three circumferential point; Confirm O position, the transient equilibrium index aperture center of circle, cross the first tested vertical line 14 of transient equilibrium index aperture center of circle work and axes intersect, relatively the angle of the first tested vertical line and benchmark center of gravity line; Whether this angle of the measurement result of evaluating parts meets the demands 0 ° ± 1 °.
This method can also be in order to the teeth groove center of the gear 9 on the detection balancing shaft 10 and the actual angle of balancing shaft center of gravity line
Method is; As shown in Figure 3; Utilize three coordinate measuring machine self-centering gauge head to measure teeth groove 11, have in the teeth groove of three coordinate measuring machine gauge head in the cross section at distance A portion diameter of axle end face 166.15MM place of self-centering function to contact the two ends flank, when the self-centering gauge head with after teeth groove 11 two sides contact; The center of self-centering gauge head is exactly teeth groove 11 centers; Thereby obtain the coordinate at teeth groove 11 centers, cross the second tested vertical line 15 of 1 work of teeth groove center O and axes intersect, relatively the angle of the second tested vertical line 15 and benchmark center of gravity line 12.Whether this angle of the measurement result of evaluating parts meets the demands 5 ° 02 ' ± 1 °.
Claims (3)
1. method that detects the skew of axial workpiece and benchmark center of gravity line based on gas suspension and three-dimensional coordinate; It is in level reference; Naturally fall behind down after utilizing air pressure that axial workpiece is suspended and support, in first sagittal plane of axial workpiece, gather the coordinate figure of at least three circumference millet cake; Utilize the first central coordinate of circle value of this periphery of coordinate figure calculating of at least three circumference millet cake, confirm first home position; In second sagittal plane of axial workpiece, gather the coordinate figure of at least three circumference millet cake, utilize the second central coordinate of circle value of this circumference of coordinate figure calculating of at least three circumference millet cake, confirm second home position; Connect first center of circle and second center of circle, obtain the axis of axial workpiece, cross the benchmark center of gravity line that axis makes to obtain perpendicular to the vertical line of level reference axial workpiece;
The coordinate figure of at least three circumference millet cake in the transient equilibrium index aperture of collection axial workpiece end face; Utilize the central coordinate of circle value of this transient equilibrium index aperture of coordinate figure calculating of at least three circumferential point; Confirm transient equilibrium index aperture home position; Cross the first tested vertical line of transient equilibrium index aperture center of circle work and axes intersect, relatively the angle of the first tested vertical line and benchmark center of gravity line;
Or gather the teeth groove center point coordinate that axial workpiece cogs, and obtain the position of teeth groove central point, cross the second tested vertical line of teeth groove central point work and axes intersect, relatively the angle of the second tested vertical line and benchmark center of gravity line.
2. detect the method for the skew of axial workpiece and benchmark center of gravity line according to claim 1 based on gas suspension and three-dimensional coordinate, it is characterized in that it is to utilize the three-dimensional coordinates measurement machine testing to be provided with the horizontal reference plate of axial workpiece, obtains level reference; The three-dimensional coordinates measurement machine testing obtains the angle of the described first tested vertical line and benchmark center of gravity line.
3. detect the method for axial workpiece and the skew of benchmark center of gravity line according to claim 1 based on gas suspension and three-dimensional coordinate, it is characterized in that it is to utilize the self-centering detection head detection of three coordinate measuring machine to obtain the position of teeth groove central point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010609737 CN102141393B (en) | 2010-12-28 | 2010-12-28 | Method for detecting deviation of shaft-like part from reference gravity center line on basis of gas suspension and three-dimensional coordinate and gas suspension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010609737 CN102141393B (en) | 2010-12-28 | 2010-12-28 | Method for detecting deviation of shaft-like part from reference gravity center line on basis of gas suspension and three-dimensional coordinate and gas suspension device |
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| Publication Number | Publication Date |
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| CN102141393A CN102141393A (en) | 2011-08-03 |
| CN102141393B true CN102141393B (en) | 2012-07-11 |
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| CN 201010609737 Expired - Fee Related CN102141393B (en) | 2010-12-28 | 2010-12-28 | Method for detecting deviation of shaft-like part from reference gravity center line on basis of gas suspension and three-dimensional coordinate and gas suspension device |
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| CN104842153B (en) * | 2014-12-19 | 2017-04-05 | 北京卫星制造厂 | A kind of pose adjustment and unloading Efficiency testing integrated apparatus |
| CN108444431B (en) * | 2018-03-19 | 2020-02-18 | 成都飞机工业（集团）有限责任公司 | Pipe fitting shape detection method based on three mounting points |
| CN117310107B (en) * | 2023-09-28 | 2024-07-12 | 青岛市农业科学研究院(山东省农业科学院青岛市分院) | Apple internal injury detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100387958C (en) * | 2004-07-13 | 2008-05-14 | 浙江大学 | Dynamic balance measuring instrument |
| CN100363707C (en) * | 2006-03-17 | 2008-01-23 | 哈尔滨工业大学 | Precisive determining system of mechanical arm location and gesture in space |
| CN101439412B (en) * | 2008-12-23 | 2010-08-25 | 大连晨瑞自动化系统有限公司 | Method and apparatus for automatically measuring error and processing semi-unit-type crank shaft main journal basic regular circle |
| CN101571378B (en) * | 2009-06-16 | 2011-05-04 | 北京理工大学 | Measurement method of axial size of abrupt-change cross section of revolving body |
| CN101839791B (en) * | 2010-05-19 | 2012-09-05 | 中国科学院电工研究所 | Uncompleted spherical superconducting rotor air floatation balance measurement method |
| CN101846573B (en) * | 2010-05-19 | 2012-01-04 | 中国科学院电工研究所 | Method for testing rotary inertia of incomplete spherical superconducting rotor |
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