CN106863177A - Positioner - Google Patents
Positioner Download PDFInfo
- Publication number
- CN106863177A CN106863177A CN201710136481.2A CN201710136481A CN106863177A CN 106863177 A CN106863177 A CN 106863177A CN 201710136481 A CN201710136481 A CN 201710136481A CN 106863177 A CN106863177 A CN 106863177A
- Authority
- CN
- China
- Prior art keywords
- lead column
- workpiece
- locating ring
- positioning
- loose collar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The present invention relates to a kind of positioner.For the positioning to the workpiece with through hole, including detent mechanism, including supporting plate, it is vertically fixed in the supporting plate and the lead column of the through hole can be worn, the locating ring for being fixed in the supporting plate and being coaxially disposed around the lead column；Guiding mechanism, be arranged in the through hole and can relatively described lead column reciprocatingly slide and can with it is described positioning czermak space coordinate.Due to setting detent mechanism and guiding mechanism, guiding mechanism is reciprocatingly slided along lead column, and when the positioning czermak space on guiding mechanism and detent mechanism coordinates, workpiece positioning is finished.By the quick-fit of guiding mechanism and locating ring to find the positioning datum of workpiece accurately, the location efficiency of workpiece is can guarantee that, meanwhile, improve the axiality of through hole and lead column on workpiece, it is ensured that the positioning precision of workpiece.
Description
Technical field
The present invention relates to mechanical frock technical field, more particularly to a kind of positioner.
Background technology
For the positioning with through hole workpiece, generally workpiece is positioned as positioning datum add with the center line of through hole
Work, but, for traditional positioner, during being positioned to workpiece by positioner, it is necessary to by test
Instrument is repeatedly measured with correcting plane degree and the depth of parallelism, and then finds positioning datum accurately, can so be largely effected on operating efficiency and be determined
Position precision.
The content of the invention
Based on this, it is necessary to provide a kind of positioner that can improve efficiency and precision.
A kind of positioner, for the positioning to the workpiece with through hole, it is characterised in that including：
Detent mechanism, including supporting plate, are vertically fixed in the supporting plate and can wear the lead column of the through hole, Gu
The locating ring for being scheduled in the supporting plate and being coaxially disposed around the lead column；
Guiding mechanism, be arranged in the through hole and can relatively described lead column reciprocatingly slide and can be with the positioning
Czermak space coordinates.
Wherein in one embodiment, the guiding mechanism includes the loose collar being slidably matched with the lead column, described
Gap value between loose collar and the locating ring is A, wherein, 2 μm≤A≤8 μm.
Wherein in one embodiment, the value of the gap value A between the loose collar and the locating ring is 5 μm.
Wherein in one embodiment, the loose collar include cylindrical portion, and it is vertical with the cylindrical portion be connected simultaneously it is concentric
The disc portion of setting.
Wherein in one embodiment, the guiding mechanism also include be set in the loose collar and with the guiding
The ball bearing guide bushing that post is slidably matched.
Wherein in one embodiment, the lead column is provided with the sealing for preventing fluid from revealing with the ball bearing guide bushing
Circle.
Wherein in one embodiment, the quantity of the lead column is two.
Wherein in one embodiment, the plating wearing layer for reducing abrasion is provided with the lead column.
Wherein in one embodiment, the diameter of section of the ball bearing guide bushing is straight less than or equal to the section of the locating ring
Footpath.
Wherein in one embodiment, including it is following in any one：
Also include the dismounting lever for the workpiece to be unloaded from the detent mechanism；
The limited post of distance between the restricted workpiece and the supporting plate is set in the supporting plate.
The positioner that the present invention is provided, due to setting detent mechanism and guiding mechanism, guiding mechanism is reciprocal along lead column
Slide, when the positioning czermak space on guiding mechanism and detent mechanism coordinates, workpiece positioning is finished.By guiding mechanism and positioning
The quick-fit of ring can guarantee that the location efficiency of workpiece to find the positioning datum of workpiece accurately, meanwhile, improve on workpiece through hole with
The axiality of lead column, it is ensured that the positioning precision of workpiece.
Brief description of the drawings
The structural representation that Fig. 1 is positioned for positioner that an embodiment is provided to workpiece；
The structural representation of detent mechanism in the positioner that Fig. 2 is provided for an embodiment；
Fig. 3 is the cross-sectional view of Fig. 1；
Fig. 4 is structure enlarged diagram at B in Fig. 3；
The structural representation of guiding mechanism in the positioner that Fig. 5 is provided for an embodiment,
The structural representation of the positioner that Fig. 6 is provided for another embodiment.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give better embodiment of the invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described implementation method.On the contrary, the purpose for providing these implementation methods is to make to understand more the disclosure
Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " interior ", " outward ", "left", "right" and
For illustrative purposes only, it is unique implementation method to be not offered as similar statement.
Refering to Fig. 1 and Fig. 2, a kind of positioner, for the positioning to the workpiece 300 with through hole 310, the positioner
Including detent mechanism 100 and guiding mechanism 200.Detent mechanism 100 includes supporting plate 110, lead column 120 and locating ring 130.Lead
It is vertically fixed on the upper surface of supporting plate 110 to post 120, lead column 120 can pass through the through hole 310 on workpiece 300, locating ring
130 fix over the carrier plate 110, and locating ring 130 is set around lead column 120, and cause that locating ring 130 is same with lead column 120
Axle (center line of locating ring 130 overlaps with the axis of lead column 120).Guiding mechanism 200 is arranged on the through hole 310 of workpiece 300
In, guiding mechanism 200 can be oppositely oriented post 120 and up and down reciprocatingly slide, and guiding mechanism 200 can keep gap with locating ring 130
Coordinate.
Refering to Fig. 1 to Fig. 4, when being positioned to workpiece 300, when guiding mechanism 200 follows workpiece 300 along lead column 120
When (being moved near supporting plate 110) moves downward, guiding mechanism 200 moves closer to locating ring 130 until both realize that gap is matched somebody with somebody
Close, when guiding mechanism 200 and locating ring 130 coordinate, positioner is completed to the positioning of workpiece 300.The positioning method is operated
Simply, the skilledization degree requirement to staff's technical ability is relatively low, need to only be directed to mechanism 200 and coordinate with locating ring 130
Determine the positioning datum (axis of lead column 120) of workpiece 300, it is to avoid the multiple correction program of other subtest instruments, pole
Big improves locating speed of the positioner to workpiece 300.
Refering to 1 to Fig. 3, guiding mechanism 200 includes loose collar 210, and the loose collar 210 is slidably matched with lead column 120, living
Rotating ring 210 can be oppositely oriented post 120 and up and down reciprocatingly slide.In fact, locating ring 130 is sleeved in lead column 120, locating ring
130 one end is fixed over the carrier plate 110, and locating ring 130 has certain height, the i.e. protrusion of locating ring 130 supporting plate 110 1
Fixed distance.The outside wall surface of loose collar 210 coordinates with through hole 310, and internal face and the lead column 120 of loose collar 210 coordinate, activity
Ring 210 follows workpiece 300 to be moved gradually downward along lead column 120, and lead column 120 plays a part of guiding so that loose collar 210
Axiality higher is kept between locating ring 130, it is ensured that fast and accurately coordinate between loose collar 210 and locating ring 130, carry
The high efficiency and precision of the positioning of workpiece 300, by the cooperation of loose collar 210 and locating ring 130 so that the center of through hole 310
Line overlaps with the axis of lead column 120, and during processing, the axis with lead column 120 is positioning datum.
To ensure the quick-fit of loose collar 210 and locating ring 130, while making the internal face and locating ring of loose collar 210
There is suitable frictional force with transmitting torque or axial force between 130 outside wall surface, the relative positioning ring 130 of loose collar 210 is difficult
Produce and rotate or slide, it is ensured that between the reliability of the positioning of workpiece 300, loose collar 210 and locating ring 130 keep certain between controlling
Gap amount A, wherein, the span of A is 2 μm≤A≤8 μm.
In certain embodiments, the value of the gap value A between loose collar 210 and locating ring 130 is 5 μm.By both
Cooperation ensure that positioning is reliable on the basis of, loose collar 210 is easily disassembled with locating ring 130, therefore, loose collar 210 with position
Cargo handling process between ring 130 is fast, time-consuming short, can complete assembly or disassembly within 10 seconds, greatly improves work effect
Rate.Meanwhile, in unloading process, loose collar 210 will not be deformed and wear and tear with locating ring 130, not interfere with next processing
When workpiece 300 positioning precision.It will be appreciated, of course, that the need for according to actual conditions, in other embodiments, loose collar 210
It it is 3 μm or 6 μm etc. with the value of the gap value A between locating ring 130.
Refering to Fig. 3 to Fig. 5, in certain embodiments, loose collar 210 includes cylindrical portion 211 and disc portion 212, disc portion
212 it is vertical with the bottom of cylindrical portion 211 be connected, both are arranged concentrically (center line keep overlap).Certainly, disc portion 212 is outer
Footpath is more than the external diameter of cylindrical portion 211, the length of the length more than disc portion 212 of cylindrical portion 211.To ensure that loose collar 210 can be with
Through hole 310 on workpiece 300 coordinates, the diameter of the external diameter less than through hole 310 of disc portion 212.When loose collar 210 and locating ring
During 130 cooperation, disc portion 212 is located at the top of cylindrical portion 211.
Refering to Fig. 1, Fig. 3 to Fig. 5, guiding mechanism 200 also includes ball bearing guide bushing 220, and ball bearing guide bushing 220 is located at loose collar
Between 210 and lead column 120, i.e., ball bearing guide bushing 220 is set in loose collar 210, and is slidably matched with lead column 120.To work
When part 300 is positioned, loose collar 210 is set in the outside wall surface of ball bearing guide bushing 220, then will be arranged with loose collar 210
Ball bearing guide bushing 220 and lead column 120 be slidably matched on, now, loose collar 210 produces relative slip with ball bearing guide bushing 220, rolls
Pearl guide pin bushing 220 and the directly contact of lead column 120.
Due to the effect of ball bearing guide bushing 220, reduce loose collar 210 and be oppositely oriented the friction resistance that post 120 is slided and produced
Power, further increase between loose collar 210 and locating ring 130 with sum velocity.Meanwhile, loose collar 210 and ball bearing guide bushing 220
Between there is less fit-up gap, ball bearing guide bushing 220 has surface processing accuracy higher, ball bearing guide bushing 220 and lead column
There is axiality higher, loose collar 210 and the accurate fit of locating ring 130, it is ensured that on workpiece 300 between 120 and locating ring 130
The center line of sliding block and the registration accuracy of axis in lead column 120, improve the accuracy of the positioning of workpiece 300.The energy of ball bearing guide bushing 220
Certain pressure is born, with wearability higher, after being used for multiple times, still can make tool between locating ring 130 and loose collar 210
Standby axiality higher, it is ensured that both accurate fits.
Ball bearing guide bushing 220 includes guide sleeve body 221, retainer and ball body 222.Retainer is arranged on guide sleeve body 221
On, mounting hole is set on retainer, ball body 222 is then contained in the mounting hole, and the end of the protrusion mounting hole of ball body 222 is opened
Mouthful, i.e., ball body 222 protrudes the outside wall surface and internal face setting height of guide sleeve body 221.In the sliding process of ball bearing guide bushing 220
In, guide sleeve body 221 does not form face contact relation, ball body 222 and loose collar 210 directly with loose collar 210 and lead column 120
Point contact is formed and lead column 120 between, the resistance to sliding that ball bearing guide bushing 220 is oppositely oriented post 120 is reduced, work is decreased
The resistance to sliding of the counter ball guide pin bushing 220 of rotating ring 210, improves between ball bearing guide bushing 220 and loose collar 210 or lead column 120
Sliding speed, it is ensured that precision and speed that detent mechanism 100 is positioned to workpiece 300.
In certain embodiments, the quantity of lead column 120 is two, certainly, is provided with workpiece 300 and lead column 120
Corresponding two through holes 310.Accordingly, it is capable to using two axis of lead column 120 simultaneously as positioning datum.In other embodiments
In, the quantity of lead column 120 can be one.
Lead column 120 is provided with sealing ring with ball bearing guide bushing 220.Contain lubricating oil in the retainer of ball bearing guide bushing 220, this
Sample is more beneficial for the slip between the relative motion ring 210 of ball bearing guide bushing 220 and lead column 120, and sealing ring can effectively prevent ball
The oil leakage of guide pin bushing 220 and pollute workpiece 300 and detent mechanism 100, while the wave for avoiding oil leakage and producing
Take.
In certain embodiments, plating wearing layer is provided with lead column 120, for example, electroplating one layer of chromium in lead column 120
Metal film, chromium metal film advantageously reduces the abrasion of lead column 120, it is ensured that the accuracy that lead column 120 is oriented to, and improves workpiece
300 positioning precision.
Locating ring 130 can be integrally formed with lead column 120, and in certain embodiments, locating ring 130 is set in lead column
On 120, the inner surface of locating ring 130 coordinates with the outer surface of lead column 120.The diameter of section of ball bearing guide bushing 220 is less than or equal to
The diameter of section of locating ring 130.
Refering to Fig. 1 to Fig. 4, during workpiece 300 is positioned, loose collar 210 and ball bearing guide bushing 220 follow workpiece 300
Moved downward along lead column 120, when the upper-end contact of lower end and the locating ring 130 of ball bearing guide bushing 220, ball bearing guide bushing 220 because
Interference effect and stop continue slide downward, between existing between the internal face of loose collar 210 and the outside wall surface of locating ring 130
Gap amount, in the presence of pressure at right angle, loose collar 210 and the accurate fit of locating ring 130 and relative positioning ring 130 is moved downward,
When bottom and the supporting plate 110 of loose collar 210 are close to contact condition, the stop motion of loose collar 210, now, loose collar 210 with
Locating ring 130 keeps gap to coordinate.Played by the cooperation between loose collar 210 and locating ring 130 and the positioning of workpiece 300 is imitated
Really.
Lead column 120 is set and taper chamfering away from one end (upper end) of supporting plate 110, in the presence of taper chamfering,
Ensure the quick-fit between ball bearing guide bushing 220 and lead column 120.
Refering to Fig. 2 and 6, the positioner also includes dismounting lever 400, and limited post 140 is provided with supporting plate 110, limits
Position post 140 1 has eight, and eight 140 points of limited posts are four groups, and every group includes two limited posts 140, four groups of institutes of limited post 140
The position at place just constitutes a rectangle, and lead column 120 is then located at the rectangle with respect on the midpoint on both sides.Work as loose collar
210 with locating ring 130 when coordinating, the lower surface of workpiece 300 just with the tip contact of limited post 140, the height of limited post 140
Can adjust such that it is able to adjust the height of the upper surface relative support plate 110 of workpiece 300, certainly, the lower surface of workpiece 300 with
Gap between supporting plate 110 also and then changes.After 300 completion of processing of workpiece, one end insertion of lever 400 can will be dismantled
In gap between workpiece 300 and supporting plate 110, while the other end to unloading lever 400 applies pressure, work can be so released
Cooperation between rotating ring 210 and locating ring 130, so as to be unloaded the machined workpiece 300 for finishing with feeding.
Refering to Fig. 6, it is worth mentioning at this point that, when workpiece 300 and detent mechanism 100 coordinate, detent mechanism 100 and workpiece
300 combination assembly in itself can also be used as a new positioner, and four corners near workpiece 300 are respectively provided with one
Individual detection datum hole 320, the new positioner can play positioning action to other products 500, during positioning, produce
The positioning datum of product 500 is four detection datum holes 320 on workpiece 300, is so easy to product 500 to be corrected outside board
And exchange.
During operation, first supporting plate 110 is placed in the horizontal plane, make lead column 120 upward, then ball bearing guide bushing will be arranged with
220 loose collar 210 coordinates with the through hole 310 on workpiece 300.Then make lead column 120 through ball bearing guide bushing 220, promote work
Part 300 is oppositely oriented post 120 and slides downwards, when the lower end of ball bearing guide bushing 220 forms withstanding effect with the upper end of locating ring 130
When, ball bearing guide bushing 220 stops sliding, and now, accurate fit is started between loose collar 210 and locating ring 130.In continuing for pressure
Under effect, the relative positioning ring 130 of loose collar 210 is moved downward, when workpiece 300 is contacted with supporting plate 110, loose collar 210 with
Locating ring 130 is fully mated, and detent mechanism 100 is finished to the positioning of workpiece 300.After 300 completion of processing of workpiece, by artificial
Or the effect that automation is set, move up the relative support plate 110 of workpiece 300, and drive loose collar 210 to depart from locating ring
130.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of positioner, for the positioning to the workpiece with through hole, it is characterised in that including：
Detent mechanism, including supporting plate, are vertically fixed in the supporting plate and can wear the lead column of the through hole, Yi Jigu
The locating ring for being scheduled in the supporting plate and being coaxially disposed around the lead column；
Guiding mechanism, be arranged in the through hole and can relatively described lead column reciprocatingly slide and can be with the positioning interannular
Gap coordinates.
2. positioner according to claim 1, it is characterised in that the guiding mechanism includes and the lead column is slided
The loose collar of cooperation, the gap value between the loose collar and the locating ring is A, wherein, 2 μm≤A≤8 μm.
3. positioner according to claim 2, it is characterised in that the gap between the loose collar and the locating ring
The value for measuring A is 5 μm.
4. positioner according to claim 2, it is characterised in that the loose collar includes cylindrical portion, and with the post
The disc portion that shape portion vertically connects and is arranged concentrically.
5. positioner according to claim 2, it is characterised in that the guiding mechanism also includes being set in the activity
The ball bearing guide bushing being slidably matched in ring and with the lead column.
6. positioner according to claim 5, it is characterised in that the lead column is provided with anti-with the ball bearing guide bushing
The sealing ring that only fluid is revealed.
7. positioner according to claim 5, it is characterised in that the diameter of section of the ball bearing guide bushing is less than or equal to
The diameter of section of the locating ring.
8. positioner according to claim 1, it is characterised in that be provided with the lead column for reducing abrasion
Plating wearing layer.
9. positioner according to claim 1, it is characterised in that the quantity of the lead column is two.
10. positioner according to claim 1, it is characterised in that including any one in following：
Also include the dismounting lever for the workpiece to be unloaded from the detent mechanism；
The limited post of distance between the restricted workpiece and the supporting plate is set in the supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136481.2A CN106863177A (en) | 2017-03-08 | 2017-03-08 | Positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136481.2A CN106863177A (en) | 2017-03-08 | 2017-03-08 | Positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106863177A true CN106863177A (en) | 2017-06-20 |
Family
ID=59170230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710136481.2A Pending CN106863177A (en) | 2017-03-08 | 2017-03-08 | Positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106863177A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4544969B2 (en) * | 2004-10-29 | 2010-09-15 | 株式会社ナベヤ | Fastening device |
| CN103419328A (en) * | 2012-05-16 | 2013-12-04 | 鸿富锦精密工业（深圳）有限公司 | Mold |
| CN203901575U (en) * | 2013-12-26 | 2014-10-29 | 勋龙精密模具(昆山)有限公司 | Die guide device |
| CN105312949A (en) * | 2015-10-30 | 2016-02-10 | 广东长盈精密技术有限公司 | Positioning device |
| CN205968240U (en) * | 2016-07-27 | 2017-02-22 | 深圳市祈飞科技有限公司 | Automatic centering device |
| CN206643806U (en) * | 2017-03-08 | 2017-11-17 | 广东长盈精密技术有限公司 | Positioner |
-
2017
- 2017-03-08 CN CN201710136481.2A patent/CN106863177A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4544969B2 (en) * | 2004-10-29 | 2010-09-15 | 株式会社ナベヤ | Fastening device |
| CN103419328A (en) * | 2012-05-16 | 2013-12-04 | 鸿富锦精密工业（深圳）有限公司 | Mold |
| CN203901575U (en) * | 2013-12-26 | 2014-10-29 | 勋龙精密模具(昆山)有限公司 | Die guide device |
| CN105312949A (en) * | 2015-10-30 | 2016-02-10 | 广东长盈精密技术有限公司 | Positioning device |
| CN205968240U (en) * | 2016-07-27 | 2017-02-22 | 深圳市祈飞科技有限公司 | Automatic centering device |
| CN206643806U (en) * | 2017-03-08 | 2017-11-17 | 广东长盈精密技术有限公司 | Positioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105547106B (en) | A kind of deep hole internal diameter measuring device | |
| CN103921170B (en) | The rotary table center positioning method of spindle swing Five-axis NC Machining Center | |
| CN107101570B (en) | A kind of right angle calibration block layout method, coordinate scaling method and the coordinate adjustment method of gear measuring center | |
| CN207501861U (en) | A kind of bearing collar path circumference multi-parameter measurer | |
| CN202024752U (en) | Coaxiality measuring instrument | |
| CN110144587A (en) | A kind of laser cladding process bath temperature on-Line Monitor Device and method | |
| CN108500777A (en) | The detection device and its detection method of polishing disk form error in unified annular polishing | |
| CN206643806U (en) | Positioner | |
| CN110793794A (en) | Ball arm instrument-based dynamic precision detection method for five-axis machine tool in complex motion state | |
| CN104457522B (en) | Method for measuring keyway symmetry degree of shaft part | |
| CN105965049B (en) | A kind of method for assembling positioning bore hole to aircraft canard using servo-drive system | |
| CN106863177A (en) | Positioner | |
| CN104117913B (en) | A kind of centre of gyration aligning method of many bistriques turntable | |
| US20080028627A1 (en) | Sapphire alignment fixture | |
| CN114253217A (en) | Five-axis machine tool RTCP automatic calibration method with self-correction function | |
| CN112097718B (en) | Detection method of turbine disk with crown | |
| CN110207634A (en) | A kind of in-situ measurement equipment and measurement method | |
| CN208067952U (en) | The detection device of polishing disk form error in unified annular polishing | |
| CN202947665U (en) | Roll neck blind hole symmetry measurement instrument | |
| CN106643600B (en) | Multifunctional intelligent coordinate detector | |
| CN205991797U (en) | Hub bearing outer ring channel calipers and system | |
| CN205844489U (en) | A kind of armature measurement jig device | |
| CN210374944U (en) | Eccentric shaft measuring instrument | |
| CN103630104A (en) | Method for measuring curvature radius of spherical basal planes of tapered rollers | |
| CN108254180A (en) | A kind of Optimal improvements method of cam lift error evaluation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |