CN107421425A - A kind of camshaft device for detecting symmetry degree and its measuring method - Google Patents
A kind of camshaft device for detecting symmetry degree and its measuring method Download PDFInfo
- Publication number
- CN107421425A CN107421425A CN201710708295.1A CN201710708295A CN107421425A CN 107421425 A CN107421425 A CN 107421425A CN 201710708295 A CN201710708295 A CN 201710708295A CN 107421425 A CN107421425 A CN 107421425A
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- Prior art keywords
- camshaft
- block
- live spindle
- bearing
- guiding rail
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Classifications
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
Abstract
A kind of camshaft device for detecting symmetry degree and its measuring method, including：A kind of camshaft device for detecting symmetry degree, it is made up of base, preceding mounting assembly, positioning and clamping mechanism, tailstock component, clamping arrestment mechanism, subsidiary mechanism and guiding rail mechanism, main be particular in that is positioned using Double Tops point, 180 ° of rotation scroll chucks and indexing block, and subsidiary mechanism can coordinate detection cam shaft diameter axiality, the linearity of camshaft in the axial direction.Specifically measuring method is：According to the length of camshaft, the centre bore at camshaft both ends is withstood using stationary center, floating centre, the camshaft that live spindle drives scroll chuck to clamp is turnable 180 °, and whether measurement camshaft both sides curve symmetric degree is qualified.The present invention it is simple and reasonable, easy to use it is directly perceived, time saving and energy saving and accuracy of measurement is high, greatly reduce the operation difficulty and labor intensity of staff.
Description
Technical field
The present invention relates to a kind of detection means, specifically a kind of camshaft device for detecting symmetry degree.
Background technology
Camshaft is to apply one of crucial transmission parts in pneumatic drum brake, and the crudy of camshaft is to determine
Determine the technical indicator of the gentle drum pressure formula brake efficiency of service life of camshaft.In order to ensure the processing of camshaft essence
Degree, needs to measure its cam curve symmetry, current detection method is required for manually examining greatly after machining
Survey, so not only waste time and energy, efficiency is low, and poor reliability, and accuracy of measurement is poor, and is also not suitable for producing in enormous quantities
Detection.
The content of the invention
The present invention provides a kind of simple and reasonable, easy to use cam directly perceived, time saving and energy saving and high accuracy of measurement
Axial symmetry degree detection means and its measuring method, greatly reduce the operation difficulty and labor intensity of staff.
To achieve these goals, the technical solution adopted by the present invention is：A kind of camshaft device for detecting symmetry degree, including
Base, preceding mounting assembly, positioning and clamping mechanism, tailstock component, clamping arrestment mechanism, subsidiary mechanism and line slideway machine
Structure, it is characterised in that：
The preceding mounting assembly includes bearing, support bar, fixture block, dial gauge, and bearing is bolted on guiding rail mechanism
One end, support bar of the interference fit installation for fixing clip in bearing upper end hole, open locking hole A and locking hole B on fixture block,
Fixture block is locked on support bar by locking hole A, dial gauge is locked on fixture block by locking hole B;
The positioning and clamping mechanism include 60 ° of stationary centers, 60 ° of floating centres, scroll chuck, live spindle, indexing block, 60 °
On the bearing of preceding mounting assembly, 60 ° of floating centres are arranged in live spindle centre bore stationary center interference fit, and
Coordinate with live spindle center interporal lacuna, 60 ° of floating centre stage casing sets are provided with the compression spring of floating pressure, and tail end is set
For preventing from and adjusting the nut of floating pressure;Scroll chuck for fixing to clamp cam shaft tail end is arranged on rotation
The front end of main shaft, rotates with live spindle, and two lateral apertures are opened in live spindle front end, installs hard with indexing block full line forcing overlap joint
Pin;60 ° of stationary centers, 60 ° of floating centres, scroll chuck, live spindle, the central shaft for indexing block, indexing block full line forcing and hard pin
Lap-joint be respectively positioned on same straight line, it is parallel with guiding rail mechanism plane；
The tailstock component includes shell, bonnet, bottom plate, taper roll bearing, round nut and dust ring, described live spindle
It is supported on by taper roll bearing in shell aperture, the round nut for adjusting bearing pre-fastening is fixed on live spindle endpiece
On, to be locked with locking plate, indexing block is fixed on shell by pin bolt, is overturn around pin bolt, and case nose adds dust ring,
Shell and bottom plate weld together, and being installed on bottom plate lower plane makes the sliding block that bottom plate moves along guiding rail mechanism；
The arrestment mechanism that clamps is included in two swing gripping blocks of tailstock component bottom plate tail end installation, swings in gripping block and pacify
The rotation direction of the dress left-handed nut that can be swung around bearing pin opposite each other and right-handed nut, coordinate with left-handed nut and right-handed nut
Both ends process the screw rod of left hand thread and right-handed thread and the handwheel on screw rod respectively, rotate handwheel, screw rod band movable pendulum
Dynamic gripping block clamping guide-rail, bottom plate are fixed;
The subsidiary mechanism includes auxiliary gauge stand, sliding block and guiding rail mechanism, and sliding block installation is aided under gauge stand, makes auxiliary
Gauge stand moves along guiding rail mechanism, and auxiliary gauge stand can place other measurement cubings, detection cam shaft diameter axiality, camshaft
Linearity in the axial direction etc.;
The guiding rail mechanism includes the guiding rail mechanism that two sets of parallel side-by-sides are arranged on base, a set of and preceding bearing group
Part, positioning and clamping mechanism, tailstock component, clamping arrestment mechanism coordinate, and a set of and auxiliary gauge stand coordinates, and guiding rail mechanism includes
Guide rail and block, guide rail are bolted on base, and guide rail afterbody is provided with the block that anti-limited slip block skids off guide rail.
The present invention also relates to a kind of measuring method of camshaft device for detecting symmetry degree, and specific measuring process includes：
（1）, according to the length of camshaft, bottom plate is slided into guide rail correct position, the handwheel for clamping arrestment mechanism is rotated, the bottom of by
Plate is locked on guide rail；
（2）, withstand with stationary center, floating centre the centre bore at camshaft both ends, scroll chuck gripping cams axle endpiece；
（3）, by dial gauge by locking hole B be arranged on fixture block on；
（4）, will indexing block full line forcing and the hard pin buckle in live spindle front end it is good, dial gauge measures the numerical value on cam axial curve；
（5）, lift indexing block, the camshaft that live spindle drives scroll chuck to clamp overturns 180 °；
（6）, detain indexing block, it is determined that indexing block full line forcing and the hard pin buckle in live spindle front end is good, it is another that dial gauge measures camshaft
Numerical value on lateral curvature line；
（7）, contrast number, show whether camshaft both sides curve symmetric degree qualified；
（8）, when needing, magnetic force dial gauge gauge stand is placed on auxiliary gauge stand, detection cam shaft diameter is coaxial with respect to centre bore
Degree, can also check the linearity of cam in the axial direction；
（9）, unclamp scroll chuck, change another camshaft and continue checking for.
It is of the invention to be using the beneficial effect obtained after above-mentioned technical proposal：The inventive structure is simple, easy to operate, adapts to
In live batch detection；It is versatile, the different all kinds of camshafts of length, diameter can be detected；Real use state can be simulated,
Accuracy of detection is high.
It is positive structure schematic of the present invention to illustrate Fig. 1.
Fig. 2 is that present invention indexing block lifts structural representation.
Fig. 3 is cross section structure diagram of the present invention.
Fig. 4 is overlooking the structure diagram of the present invention.
Fig. 5 is that the present invention clamps arrestment mechanism structural representation.
Fig. 6 is guiding rail mechanism structural representation of the present invention.
Fig. 7 is A-A sectional structure charts in Fig. 5 of the present invention.
In figure, 1, base；2nd, bearing；3rd, support bar；4th, fixture block；5th, dial gauge；6th, stationary center；7th, floating centre；8、
Scroll chuck；9th, live spindle；10th, hard pin；11st, block is indexed；12nd, pin bolt；13rd, full line forcing；14th, handle；15th, shell；16、
Bonnet；17th, bottom plate；18th, sliding block；19th, handwheel；20th, slide rail；21st, camshaft；22nd, compression spring；23rd, taper roll bearing；
24th, round nut；25th, dust ring；26th, clamping screw；27th, locking hole A；28th, locking hole B；29th, block；30th, gauge stand is aided in；31、
Swing gripping block；32nd, right-handed nut；33rd, left-handed nut；34th, screw rod;35th, bearing pin.
Embodiment is below in conjunction with the accompanying drawings between the embodiment to the present invention such as involved each part
Mutual alignment and annexation, the effect of each part and operation principle etc. is described in further detail：
As illustrated, a kind of camshaft device for detecting symmetry degree of the present invention, including base（1）, preceding mounting assembly, positioning clamp
Mechanism, tailstock component, clamping arrestment mechanism, subsidiary mechanism and guiding rail mechanism, preceding mounting assembly include bearing（2）、
Support bar（3）, fixture block（4）, dial gauge（5）, bearing（2）It is bolted on one end of guiding rail mechanism, bearing（2）On
Interference fit installation is used for fixing clip in stomidium（4）The support bars of φ 10（3）, fixture block（4）On process the locking hole A of φ 10
（27）With the locking hole B of φ 8（28）, and have the wide groovings of 2mm, pass through the locking hole A of φ 10（27）By fixture block clamping screw（26）
It is locked on the support bars of φ 10, dial gauge（5）The locking hole B of fixture block φ 8 are locked at clamping screw（28）It is interior.
Positioning and clamping mechanism includes 60 ° of stationary centers（6）, 60 ° of floating centres（7）, scroll chuck（8）, live spindle
（9）, indexing block（11）, 60 ° of stationary centers（6）Interference fit is arranged on bearing（2）On, 60 ° of floating centres（7）Installed in rotation
Main shaft（9）In centre bore, and and live spindle（9）Center interporal lacuna coordinates, 60 ° of floating centres（7）Stage casing set is provided with floating
The compression spring of pressure（22）, tail end is provided for preventing from and adjusts the nut of floating pressure（24）, for fixing
The scroll chuck of gripping cams shaft tail end（8）Installed in live spindle（9）Front end, in live spindle（9）Drive under with rotation
Turn main shaft（9）Integral-rotation together, live spindle（9）Open two lateral apertures, installation and indexing block full line forcing in front end（13）Overlap joint
Two φ 10 sell firmly（10）, the lap-joint of the pins firmly of φ 10 and indexing block needs careful facing-up, to improve precision, in the present embodiment
In, index block full line forcing（13）Skiving is to 3mm, 60 ° of stationary centers（6）, 60 ° of floating centres（7）, scroll chuck（8）, live spindle
（9）, indexing block（11）Central shaft, indexing block full line forcing（13）With hard pin（10）Lap-joint be respectively positioned on same straight line, it is and straight
Line guide rail mechanism plane is parallel；
Tailstock component includes shell（15）, bonnet（16）, bottom plate（17）, taper roll bearing（23）, round nut（24）With it is dust-proof
Circle（25）, described live spindle（9）Pass through taper roll bearing（23）It is supported on shell（15）It is pre- for adjusting bearing in hole
The round nut of clamp force（24）It is fixed on live spindle（9）On endpiece, locked with locking plate, index block（11）Pass through pin bolt（12）
It is fixed on shell（15）On, around pin bolt（12）Upset, shell（15）Front end adds dust ring（25）, shell（15）And bottom plate
（17）Weld together, bottom plate（17）Lower installation makes bottom plate（17）The sliding block moved along guiding rail mechanism（18）, due to all kinds of
Camshaft length difference is very big, is this bottom plate（17）Appropriate location can be moved to along line slideway, be locked with arrestment mechanism is clamped
；
Clamp arrestment mechanism and be included in tailstock component bottom plate（17）Two swing gripping blocks of tail end installation（31）, swing gripping block
The rotation direction of the interior installation left-handed nut that can be swung around bearing pin opposite each other（32）And right-handed nut（33）, with left-handed nut（32）
And right-handed nut（33）The both ends of cooperation process the screw rod of left hand thread and right-handed thread respectively（34）With on screw rod
Handwheel（19）, rotate handwheel（19）, screw rod（34）Drive and swing gripping block（31）Clamping guide-rail（20）, bottom plate（17）Consolidated
It is fixed;
Slide assemblies are aided in include auxiliary gauge stand（30）, sliding block（18）And guiding rail mechanism, sliding block（18）Installation auxiliary gauge stand
（30）Under, make auxiliary gauge stand（30）Moved along guiding rail mechanism, aid in gauge stand（30）Other measurement cubings can be placed, detection is convex
Wheel shaft diameter of axle axiality, the linearity of camshaft in the axial direction etc..
Guiding rail mechanism includes the guiding rail mechanism that two sets of parallel side-by-sides are arranged on base, a set of and preceding bearing group
Part, positioning and clamping mechanism, tailstock component, clamping arrestment mechanism coordinate, and a set of and auxiliary gauge stand coordinates, and guiding rail mechanism includes
Guide rail（20）And block（29）, guide rail（20）It is bolted on base（1）On, guide rail（20）Afterbody is provided with anti-limited slip block
（18）Skid off guide rail（20）Block（29）.
A kind of specific measuring process of camshaft device for detecting symmetry degree of the present invention includes：
（1）, according to camshaft（21）Length, by bottom plate（17）Slide into guide rail（20）Correct position, rotate and clamp brake
The handwheel of structure（19）, by bottom plate（17）It is locked in guide rail（20）On；
（2）, with 60 ° of stationary centers（6）, 60 ° of floating centres（7）Withstand camshaft（21）, scroll chuck（8）Gripping cams axle
（21）Endpiece；
（3）, by dial gauge（5）Pass through locking hole B（28）Installed in fixture block（4）On；
（4）, will index block full line forcing（13）With live spindle（9）Sell firmly front end（10）Buckle well, dial gauge（5）Measure camshaft（21）
Numerical value on curve；
（5）, lift indexing block（11）, rotate live spindle（9）180 °, scroll chuck（8）Drive camshaft（21）Upset, two
The pins firmly of φ 10 overturn 180 ° with live spindle；
（6）, detain indexing block（11）, it is determined that indexing block full line forcing（13）With live spindle（9）Sell firmly front end（10）Buckle well, realize
180 ° of indexing, use dial gauge（5）Measure camshaft（21）Numerical value on opposite side curve；
（7）, contrast number, draw camshaft（21）Whether both sides curve symmetric degree is qualified；
（8）, when needing, in auxiliary gauge stand（30）Upper placement magnetic force dial gauge（5）Gauge stand, detect camshaft（21）The diameter of axle relatively in
The axiality in heart hole, camshaft can also be checked（21）Linearity in the axial direction；
（9）, unclamp scroll chuck（8）, change another camshaft and continue checking for.
Experiment proves that the detection means detects and assembled link application, the symmetrical precision such as detection in Camshaft Production and obtains
Reliable control, ensure that the normal assembling of brake.
Exemplary description is carried out to the present invention above in conjunction with accompanying drawing, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, if the various improvement of inventive concept and technical scheme of the present invention progress are employed, or it is not improved by this
The design of invention and technical scheme directly apply to other occasions, within the scope of the present invention.
Claims (2)
1. a kind of camshaft device for detecting symmetry degree, including base, preceding mounting assembly, positioning and clamping mechanism, tailstock component, clamping
Arrestment mechanism, subsidiary mechanism and guiding rail mechanism, it is characterised in that：
The preceding mounting assembly includes bearing, support bar, fixture block, dial gauge, and bearing is bolted on guiding rail mechanism
One end, support bar of the interference fit installation for fixing clip in bearing upper end hole, open locking hole A and locking hole B on fixture block,
Fixture block is locked on support bar by locking hole A, dial gauge is locked on fixture block by locking hole B;
The positioning and clamping mechanism include 60 ° of stationary centers, 60 ° of floating centres, scroll chuck, live spindle, indexing block, 60 °
On the bearing of preceding mounting assembly, 60 ° of floating centres are arranged in live spindle centre bore stationary center interference fit, and
Coordinate with live spindle center interporal lacuna, 60 ° of floating centre stage casing sets are provided with the compression spring of floating pressure, and tail end is set
For preventing from and adjusting the nut of floating pressure;Scroll chuck for fixing to clamp cam shaft tail end is arranged on rotation
The front end of main shaft, rotates with live spindle, and two lateral apertures are opened in live spindle front end, installs hard with indexing block full line forcing overlap joint
Pin;60 ° of stationary centers, 60 ° of floating centres, scroll chuck, live spindle, the central shaft for indexing block, indexing block full line forcing and hard pin
Lap-joint be respectively positioned on same straight line, it is parallel with guiding rail mechanism plane；
The tailstock component includes shell, bonnet, bottom plate, taper roll bearing, round nut and dust ring, described live spindle
It is supported on by taper roll bearing in shell aperture, the round nut for adjusting bearing pre-fastening is fixed on live spindle endpiece
On, to be locked with locking plate, indexing block is fixed on shell by pin bolt, is overturn around pin bolt, and case nose adds dust ring,
Shell and bottom plate weld together, and being installed on bottom plate lower plane makes the sliding block that bottom plate moves along guiding rail mechanism；
The arrestment mechanism that clamps is included in two swing gripping blocks of tailstock component bottom plate tail end installation, swings in gripping block and pacify
The rotation direction of the dress left-handed nut that can be swung around bearing pin opposite each other and right-handed nut, coordinate with left-handed nut and right-handed nut
Both ends process the screw rod of left hand thread and right-handed thread and the handwheel on screw rod respectively;
The subsidiary mechanism includes auxiliary gauge stand, sliding block and guiding rail mechanism, and sliding block installation is aided under gauge stand, makes auxiliary
Gauge stand moves along guiding rail mechanism, and auxiliary gauge stand can place other measurement cubings, detection cam shaft diameter axiality, camshaft
Linearity in the axial direction etc.;
The guiding rail mechanism includes the guiding rail mechanism that two sets of parallel side-by-sides are arranged on base, a set of and preceding bearing group
Part, positioning and clamping mechanism, tailstock component, clamping arrestment mechanism coordinate, and a set of and auxiliary gauge stand coordinates, and guiding rail mechanism includes
Guide rail and block, guide rail are bolted on base, and guide rail afterbody is provided with the block that anti-limited slip block skids off guide rail.
2. a kind of measuring method of camshaft device for detecting symmetry degree, specific measuring process include：
（1）, according to the length of camshaft, bottom plate is slided into guide rail correct position, the handwheel for clamping arrestment mechanism is rotated, the bottom of by
Plate is fixed；
（2）, withstand with stationary center, floating centre the centre bore at camshaft both ends, scroll chuck gripping cams axle endpiece；
（3）, by dial gauge by locking hole B be arranged on fixture block on；
（4）, will indexing block full line forcing and the hard pin buckle in live spindle front end it is good, dial gauge measures the numerical value on cam axial curve；
（5）, lift indexing block, the camshaft that live spindle drives scroll chuck to clamp overturns 180 °；
（6）, detain indexing block, it is determined that indexing block full line forcing and the hard pin buckle in live spindle front end is good, it is another that dial gauge measures camshaft
Numerical value on lateral curvature line；
（7）, contrast number, show whether camshaft both sides curve symmetric degree qualified；
（8）, when needing, magnetic force dial gauge gauge stand is placed on auxiliary gauge stand, detection cam shaft diameter is coaxial with respect to centre bore
Degree, can also check the linearity of cam in the axial direction；
（9）, unclamp scroll chuck, change another camshaft and continue checking for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708295.1A CN107421425A (en) | 2017-08-17 | 2017-08-17 | A kind of camshaft device for detecting symmetry degree and its measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708295.1A CN107421425A (en) | 2017-08-17 | 2017-08-17 | A kind of camshaft device for detecting symmetry degree and its measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107421425A true CN107421425A (en) | 2017-12-01 |
Family
ID=60437018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710708295.1A Pending CN107421425A (en) | 2017-08-17 | 2017-08-17 | A kind of camshaft device for detecting symmetry degree and its measuring method |
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| CN (1) | CN107421425A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500300A (en) * | 2018-05-28 | 2018-09-07 | 河南华洋发动机制造有限公司 | Turnery processing crank-shaft link neck tooling |
| CN108680077A (en) * | 2018-07-13 | 2018-10-19 | 上海精智实业股份有限公司 | A kind of measuring device |
| CN109827538A (en) * | 2019-02-26 | 2019-05-31 | 燕山大学 | A kind of bar straightness detection device and its straightness detection method |
| RU190578U1 (en) * | 2018-10-08 | 2019-07-04 | Ростовский вертолетный производственный комплекс, Публичное акционерное общество "Роствертол" имени Б.Н. Слюсаря | Device for checking and adjusting the alignment of the aggregates of the turning machining center |
| CN110108194A (en) * | 2019-04-30 | 2019-08-09 | 广州雅新金属制品有限公司 | The measurement method of crankshaft symmetry |
| CN110132098A (en) * | 2019-04-28 | 2019-08-16 | 中国人民解放军第五七二一工厂 | A kind of support arm tube wall thickness dimensional discrepancy measuring device and measuring method |
| CN111272049A (en) * | 2020-03-31 | 2020-06-12 | 成都飞机工业（集团）有限责任公司 | Method for measuring eccentricity of stay bar |
| CN112556575A (en) * | 2020-12-04 | 2021-03-26 | 西北工业大学 | Small-size aviation piston engine bent axle butt joint measuring device |
| CN112683142A (en) * | 2020-11-30 | 2021-04-20 | 山东齐鲁电机制造有限公司 | Tool and method for detecting symmetry degree of conical surface and double key grooves at steam end of steam turbine generator |
| CN112683122A (en) * | 2021-01-11 | 2021-04-20 | 张帆 | Hub detection device for automobile part production |
| CN112743444A (en) * | 2020-12-31 | 2021-05-04 | 沈阳鼓风机集团往复机有限公司 | Automatic grinding device |
| CN117146676A (en) * | 2023-10-31 | 2023-12-01 | 万向钱潮股份公司 | Multipurpose measuring tool |
| CN110132098B (en) * | 2019-04-28 | 2024-04-19 | 中国人民解放军第五七二一工厂 | Device and method for measuring wall thickness dimension deviation of support arm pipe fitting |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500300A (en) * | 2018-05-28 | 2018-09-07 | 河南华洋发动机制造有限公司 | Turnery processing crank-shaft link neck tooling |
| CN108680077A (en) * | 2018-07-13 | 2018-10-19 | 上海精智实业股份有限公司 | A kind of measuring device |
| RU190578U1 (en) * | 2018-10-08 | 2019-07-04 | Ростовский вертолетный производственный комплекс, Публичное акционерное общество "Роствертол" имени Б.Н. Слюсаря | Device for checking and adjusting the alignment of the aggregates of the turning machining center |
| CN109827538A (en) * | 2019-02-26 | 2019-05-31 | 燕山大学 | A kind of bar straightness detection device and its straightness detection method |
| CN110132098A (en) * | 2019-04-28 | 2019-08-16 | 中国人民解放军第五七二一工厂 | A kind of support arm tube wall thickness dimensional discrepancy measuring device and measuring method |
| CN110132098B (en) * | 2019-04-28 | 2024-04-19 | 中国人民解放军第五七二一工厂 | Device and method for measuring wall thickness dimension deviation of support arm pipe fitting |
| CN110108194A (en) * | 2019-04-30 | 2019-08-09 | 广州雅新金属制品有限公司 | The measurement method of crankshaft symmetry |
| CN111272049B (en) * | 2020-03-31 | 2021-04-27 | 成都飞机工业（集团）有限责任公司 | Method for measuring eccentricity of stay bar |
| CN111272049A (en) * | 2020-03-31 | 2020-06-12 | 成都飞机工业（集团）有限责任公司 | Method for measuring eccentricity of stay bar |
| CN112683142A (en) * | 2020-11-30 | 2021-04-20 | 山东齐鲁电机制造有限公司 | Tool and method for detecting symmetry degree of conical surface and double key grooves at steam end of steam turbine generator |
| CN112683142B (en) * | 2020-11-30 | 2022-07-01 | 山东齐鲁电机制造有限公司 | Tool and method for detecting symmetry degree of conical surface and double key grooves at steam end of steam turbine generator |
| CN112556575B (en) * | 2020-12-04 | 2022-07-29 | 西北工业大学 | Small-size aviation piston engine bent axle butt joint measuring device |
| CN112556575A (en) * | 2020-12-04 | 2021-03-26 | 西北工业大学 | Small-size aviation piston engine bent axle butt joint measuring device |
| CN112743444A (en) * | 2020-12-31 | 2021-05-04 | 沈阳鼓风机集团往复机有限公司 | Automatic grinding device |
| CN112683122A (en) * | 2021-01-11 | 2021-04-20 | 张帆 | Hub detection device for automobile part production |
| CN112683122B (en) * | 2021-01-11 | 2022-03-11 | 枣庄福尔德汽车配件有限责任公司 | Hub detection device for automobile part production |
| CN117146676A (en) * | 2023-10-31 | 2023-12-01 | 万向钱潮股份公司 | Multipurpose measuring tool |
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