CN207703624U - A kind of tensile sample supplemental measurement tool - Google Patents
A kind of tensile sample supplemental measurement tool Download PDFInfo
- Publication number
- CN207703624U CN207703624U CN201820038834.5U CN201820038834U CN207703624U CN 207703624 U CN207703624 U CN 207703624U CN 201820038834 U CN201820038834 U CN 201820038834U CN 207703624 U CN207703624 U CN 207703624U
- Authority
- CN
- China
- Prior art keywords
- cushion cap
- fixed
- type
- measures
- sample
- 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.)
- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 73
- 230000000153 supplemental effect Effects 0.000 title claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 50
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 9
- 230000013011 mating Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000004540 process dynamic Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model is related to a kind of tensile sample supplemental measurement tools, including measuring pedestal, the one end for measuring pedestal is equipped with fixed baffle, large through-hole and a small through hole there are one being opened up on fixed plate washer, it measures and fixed V-type measurement cushion cap is installed on the other end of pedestal, there are one activity V-types to measure cushion cap for setting between fixed baffle and fixed V-type measure cushion cap, three is concatenated by one big sliding bar and one small sliding bar to be connected, big sliding bar one end is fixed on large through-hole, and the other end passes through activity V-type to measure cushion cap and is fixed on fixed V-type measurement cushion cap；Small sliding bar one end is fixed on small through hole, fixed V-type is fixed on after the solid measurement cushion cap across activity V-type of the other end to measure on cushion cap, activity V-type measures cushion cap and fixed V-type measures cushion cap and is equipped with corresponding V-groove for placing sample, and activity V-type measures cushion cap and fixed V-type measures and is separately installed with handle bolt on cushion cap for compressing sample.
Description
Technical field
The utility model belongs to tensile testing equipment technical field, is related to a kind of drawing to metal material mechanics performance detection
Stretch sample supplemental measurement tool.
Background technology
Elongation after fracture and the contraction percentage of area are two big plasticity index in metal material mechanics performance.Break under normal circumstances
Elongation and the contraction percentage of area are measured by manually mode after sample fracture afterwards, as samples cannot in measurement process
Docking and positioning very well, will bring prodigious measurement error.GB/T228.1 standards provide, measure elongation after fracture and section is received
Shrinkage is not less than the vernier caliper of 0.02mm using measurement accuracy, and the fracture location for the two-section sample having no progeny carefully is matched and is connected on one
It rises, makes its axis on same straight line, received in sample section and measure minimum sectional area of having no progeny at neck, calculated according to formula disconnected
Face shrinking percentage performance indicator；The length for measuring gauge length of having no progeny measures elongation after fracture performance indicator according to formula.This was measured
Without supplemental measurement tool, two-section sample of having no progeny cannot be stitched together Cheng Ruguo well, and laboratory technician needs hand steered by one
Firmly or finger clamps sample, and another hand is measured by vernier caliper.Sample shifting is easy to happen in this mode measurement process
Dynamic dislocation, the axis of two-section sample are not arranged on the same straight line, and lead to accurately to measure have no progeny gauge length and minimum dimension of having no progeny,
Bring very big measurement error.And due to measuring slide calliper rule itself there is certain dimensional space, sample to be placed directly on workbench,
Very big inconvenience is brought in bottom without space, to measurement, influences measurement efficiency and accuracy of measurement.So if accurate quick is wanted to measure
Go out the elongation after fracture and contraction percentage of area performance indicator of sample, it is necessary to a kind of applicable supplemental measurement tool is designed, it is convenient
Splice the two-section sample having no progeny, and fixedly positioning spliced sample, and has enough measurement spaces, laboratory technician can accurate quick
Measure the elongation after fracture and contraction percentage of area performance indicator of sample.
The Chinese utility model patent file of Publication No. CN201020265778.2 discloses a kind of round tensile sample
Measure assistance platform.In terms of the data that document provides, which uses a kind of simple V-arrangement measuring table, to a certain extent
Sample of having no progeny can be met, lateral displacement does not occur in measurement process, but had the following disadvantages：1. it cannot be guaranteed that sample is surveyed
Vertical shift occurs during amount, brings measurement error；2. the measuring table does not measure space, cannot fast measure；3. only
Suitable for round tensile sample, the measurement of plate-like rectangular sample cannot be met.
Utility model content
In order to overcome the disadvantages mentioned above of the prior art, the utility model to provide a kind of tensile sample supplemental measurement tool, it
With 2 points of positioning principles in alignment, the two-section sample that fast quick-acting is had no progeny, fracture can fit like a glove, and in same
On axis, it is fixedly positioning spliced sample, is not displaced when measuring.Sufficient measurement space facilitates laboratory technician can spirit
It is living to complete sample measurement with vernier caliper.Laboratory technician measures the elongation after fracture of sample by this auxiliary tool energy accurate quick
With contraction percentage of area performance indicator, measurement accuracy and efficiency are improved, meets big production and stretches batch detection needs.
Technical solution adopted by the utility model to solve its technical problems is：A kind of tensile sample supplemental measurement tool,
Including measuring pedestal, the one end for measuring pedestal is equipped with fixed baffle, opens up that there are one large through-holes and one small on fixed plate washer
Through-hole measures and is equipped with fixed V-type measurement cushion cap on the other end of pedestal, between fixed baffle and fixed V-type measure cushion cap
There are one activity V-types to measure cushion cap for setting, and three is concatenated by one big sliding bar and one small sliding bar to be connected, big sliding bar
One end is fixed on large through-hole, and the other end passes through activity V-type to measure cushion cap and is fixed on fixed V-type measurement cushion cap；Small sliding bar
One end is fixed on small through hole, and being fixed on fixed V-type after the solid measurement cushion cap across activity V-type of the other end measures on cushion cap, movable V
Type measures cushion cap and fixed V-type measures cushion cap and is equipped with corresponding V-groove for placing sample, and activity V-type measures cushion cap and solid
Determine to be separately installed with handle bolt for compressing sample on V-type measurement cushion cap.
The fixed baffle and fixed V-type measure cushion cap and are fixed on measurement pedestal by welding manner.
The activity V-type measures cushion cap and measures cushion cap keeping parallelism with fixed V-type, and the V-groove of the two is 90 °.
The activity V-type measures cushion cap can be free to slide between measuring pedestal；Measure the top of pedestal, activity V-type is surveyed
Bottom, smooth, 1.6 μm of the smoothness requirements of large and small sliding bar processing of cushion cap are measured, activity V-type, which measures cushion cap, to measure pedestal
Upper easy and flexible sliding；Cushion cap and fixation measuring cushion cap are measured according to sample length, flexible movement and adjustment activity V-type when measurement
Between distance.
The big sliding bar and small sliding bar play fixed V-type and measure cushion cap and activity V-type measurement cushion cap, fixed to survey
After measuring sample, two V-types measure cushion cap and change in location and movement do not occur, it is ensured that the fracture of two-section sample, which can fit like a glove, matches
It connects, axis is on same straight line, and in measurement process, sample does not move, and measurement result is accurate and reliable.
The fixed V-type measures cushion cap, activity V-type measures cushion cap and the height of fixed plate washer, measures sample and measures bottom
Distance between seat ensures to measure space enough, the person of being convenient for measuring accurately and quickly completes to survey using vernier caliper in 50mm or more
Examination.
The big sliding bar and small sliding bar are in that vertical bar shape is cylindrical.
The head of the handle bolt is in semi-circular shape.
The utility model has the beneficial effects that：In actual use, according to stretching the spliced length of two-section sample of having no progeny,
Mobile activity V-type measures cushion cap, adjusts the distance between two V-types measurement cushion caps.The bare terminal end of have no progeny one section of sample is placed on
Fixed V-type measures on cushion cap, bolt of the turn head with semi-circular shape handle, and bolt and sample contacts simultaneously clamp.By what is had no progeny
The bare terminal end of another section of sample is placed on activity V-type and measures on cushion cap, and mobile activity V-type measures cushion cap, rotation adjustment sample so that
The incision position of two-section sample fits like a glove mating, bolt of the turn head with semi-circular shape handle, and bolt and sample contacts simultaneously press from both sides
Tightly.Vernier caliper is used at this time, can be convenient for measuring the diameter or rectangular specimen of have no progeny gauge length and the minimum bottleneck of sample（It is wide
Degree and thickness）.The elongation after fracture and the contraction percentage of area of sample are calculated according to normalized form.
The utility model has compact-sized, firm feature, is applicable in the disconnected of the variously-shaped tensile sample such as stick, plank
The measurement of elongation and the contraction percentage of area afterwards.It can be held according to sample length, flexible movement and adjustment activity V-type measurement when measurement
Platform between fixation measuring cushion cap at a distance from.It measures auxiliary tool and uses 2 points of positioning principles in alignment, pass through large and small two
Sliding bar two-point locating V-type measures cushion cap, the fracture of two-section sample can quick and complete identical mating, ensure that two-section is had no progeny sample
Axis on same straight line.It is fastened using bolt after Sample location, any displacement does not occur for sample in measurement process, most
Big guarantee measurement result it is accurate and reliable.The design of cushion cap height is measured to ensure between measuring sample and measuring pedestal
Distance be not less than 50mm, enough measurement spaces, the flexible vernier caliper of the person of being convenient for measuring accurately and quickly completes to test.With
Accuracy of measurement and reliability can be greatly improved for this measurement auxiliary tool and checkability is high, meets the big stretching batch that produces and examines
It surveys and needs.
Description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is that fixed V-type measures suspended deck structure schematic diagram；
Fig. 3 is that activity V-type measures suspended deck structure schematic diagram；
Fig. 4 is the vertical view of Fig. 1.
In figure：1- measures pedestal, and 2- fixes plate washer, and 3- fixes V-type and measures cushion cap, and 4- activity V-types measure cushion cap, the big cunnings of 5-
Lever, the small sliding bars of 6-, 7- handle bolts.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples.
Referring to Fig. 1~Fig. 4, a kind of tensile sample supplemental measurement tool, including pedestal 1 is measured, measure one end peace on pedestal 1
Equipped with fixed baffle, opened up on fixed plate washer 2 there are one large through-hole and a small through hole, the other end for measuring pedestal 1 is equipped with
Fixed V-type measures cushion cap 3, and there are one activity V-types to measure cushion cap 4 for setting between fixed baffle and fixed V-type measure cushion cap 3,
Three is connected by one big sliding bar 5 with a concatenation of small sliding bar 6, wherein 5 one end of big sliding bar is fixed on large through-hole
The other end passes through activity V-type to measure cushion cap 4 and is fixed on fixed V-type measurement cushion cap 3, and 6 one end of small sliding bar is fixed on small through hole
The upper other end is fixed on fixed V-type and measures on cushion cap 3 after passing through activity V-type to measure cushion cap 4, activity V-type measures cushion cap 4 and fixes
V-type measures cushion cap 3 and is equipped with corresponding V-groove for placing sample, and activity V-type measures cushion cap 4 and fixed V-type measures cushion cap 3
On be separately installed with handle bolt 7 for compressing sample.
The fixed baffle and fixed V-type measure cushion cap 3 and are fixed on measurement pedestal 1 by welding manner.
The activity V-type measures cushion cap 4 and measures 3 keeping parallelism of cushion cap with fixed V-type, and the V-groove of the two is 90 °.
The activity V-type measures cushion cap 4 can be free to slide between measuring pedestal 1；Measure top, the activity V-type of pedestal 1
The bottom of measurement cushion cap 4, large and small sliding bar 6 process smooth, 1.6 μm of smoothness requirements, and activity V-type measures cushion cap 4 and can measure
Easy and flexible is slided on pedestal 1；It measures cushion cap 4 according to sample length, flexible movement and adjustment activity V-type when measurement and is surveyed with fixed
Measure the distance between cushion cap.
The big sliding bar 5 and small sliding bar 6 play fixed V-type and measure cushion cap 3 and activity V-type measurement cushion cap 4.Gu
After location survey amount sample, two V-types measure cushion cap and change in location and movement do not occur, it is ensured that the fracture of two-section sample can fit like a glove
Mating, axis is on same straight line, and in measurement process, sample does not move, and measurement result is accurate and reliable.
The fixed V-type measures cushion cap 3, activity V-type measures cushion cap 4 and the height of fixed plate washer 2, measures sample and measures
Distance between pedestal 1 ensures to measure space enough, the person of being convenient for measuring accurately and quickly is completed using vernier caliper in 50mm or more
Test.
The big sliding bar 5 and small sliding bar 6 are in that vertical bar shape is cylindrical.
The head of the handle bolt 7 is in semi-circular shape.
In actual use, according to the spliced length for stretching two-section sample of having no progeny, mobile activity V-type measures cushion cap 4, adjusts
Whole two V-types measure the distance between cushion cap.The bare terminal end of have no progeny one section of sample is placed on fixed V-type to measure on cushion cap 3, turn
Bolt of the head with semi-circular shape handle, bolt and sample contacts simultaneously clamp.The bare terminal end for another section of sample having no progeny is placed on
Activity V-type measures on cushion cap 4, and mobile activity V-type measures cushion cap 4, rotation adjustment sample so that the incision position of two-section sample is complete
Coincide mating, bolt of the turn head with semi-circular shape handle, and bolt and sample contacts simultaneously clamp.Vernier caliper is used at this time,
The diameter or rectangular specimen of have no progeny gauge length and the minimum bottleneck of sample can be convenient for measuring（Width and thickness）.According to formula meter
Calculate the elongation after fracture and the contraction percentage of area of sample.
The utility model has compact-sized, firm feature, is applicable in the disconnected of the variously-shaped tensile sample such as stick, plank
The measurement of elongation and the contraction percentage of area afterwards.It can be held according to sample length, flexible movement and adjustment activity V-type measurement when measurement
Platform 4 between fixation measuring cushion cap at a distance from.It measures auxiliary tool and uses 2 points of positioning principles in alignment, by large and small
Two sliding bar two-point locating V-types measure cushion caps, the fracture of two-section sample can quick and complete identical mating, ensure that two-section is had no progeny examination
The axis of sample is on same straight line.It fastening using bolt after Sample location, any displacement does not occur for sample in measurement process,
It utmostly ensure that the accurate and reliable of measurement result.The design of cushion cap height is measured to ensure to measure sample and measure pedestal 1
The distance between be not less than 50mm, enough measurement spaces, the flexible vernier caliper of the person of being convenient for measuring accurately and quickly completes to test.
Accuracy of measurement and reliability can be greatly improved with this measurement auxiliary tool and checkability is high, meets big production stretching batch
Amount detection needs.
Claims (8)
1. a kind of tensile sample supplemental measurement tool, including measure pedestal, it is characterised in that：The one end for measuring pedestal is equipped with admittedly
Determine baffle, fixes on plate washer large through-hole and a small through hole there are one opening up, measure and fixed V-type is installed on the other end of pedestal
Cushion cap is measured, there are one activity V-types to measure cushion cap for setting between fixed baffle and fixed V-type measure cushion cap, and three passes through one
The big sliding bar of root and one small sliding bar concatenation are connected, and big sliding bar one end is fixed on large through-hole, and the other end passes through activity V-type
Cushion cap is measured to be fixed on fixed V-type measurement cushion cap；Small sliding bar one end is fixed on small through hole, and the other end is solid across movable V
Type, which measures, to be fixed on fixed V-type after cushion cap and measures on cushion cap, and activity V-type measures cushion cap and fixed V-type measures cushion cap and is equipped with pair
The V-groove answered is for placing sample, and activity V-type measures cushion cap and fixed V-type measures and is separately installed with handle bolt use on cushion cap
In compression sample.
2. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The fixed baffle and fixed V-type are surveyed
Amount cushion cap is fixed on measurement pedestal by welding manner.
3. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The activity V-type measures cushion cap and consolidates
Determine V-type and measure cushion cap keeping parallelism, the V-groove of the two is 90 °.
4. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The activity V-type measures cushion cap can be with
It is free to slide between measuring pedestal；Measure the top of pedestal, activity V-type measures the bottom of cushion cap, large and small sliding bar processes light
Sliding, 1.6 μm of smoothness requirements, activity V-type measures cushion cap can the easy and flexible sliding on measuring pedestal；It is long according to sample when measurement
It is short, flexible movement and adjustment activity V-type measure cushion cap between fixation measuring cushion cap at a distance from.
5. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The big sliding bar and small sliding bar rise
Fixed V-type measures cushion cap and activity V-type measures the effect of cushion cap, and after fixation measuring sample, two V-types measure cushion caps and position does not occur
Set variation and movement, it is ensured that the fracture of two-section sample can fit like a glove mating, and axis is on same straight line, in measurement process
In, sample does not move, and measurement result is accurate and reliable.
6. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The fixed V-type measures cushion cap, activity
V-type measures the height of cushion cap and fixed plate washer, measures sample and measures at a distance between pedestal in 50mm or more, ensures to measure enough
Space, the person of being convenient for measuring accurately and quickly complete to test using vernier caliper.
7. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The big sliding bar and small sliding bar are equal
It is cylindrical in vertical bar shape.
8. tensile sample supplemental measurement tool as described in claim 1, it is characterised in that：The head of the handle bolt is in semicircle
Annular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820038834.5U CN207703624U (en) | 2018-01-10 | 2018-01-10 | A kind of tensile sample supplemental measurement tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820038834.5U CN207703624U (en) | 2018-01-10 | 2018-01-10 | A kind of tensile sample supplemental measurement tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207703624U true CN207703624U (en) | 2018-08-07 |
Family
ID=63034900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820038834.5U Expired - Fee Related CN207703624U (en) | 2018-01-10 | 2018-01-10 | A kind of tensile sample supplemental measurement tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207703624U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596505A (en) * | 2018-11-27 | 2019-04-09 | 西安近代化学研究所 | A kind of large scale pressed explosives column hydrothermal aging test sample basket |
| CN110108527A (en) * | 2019-04-30 | 2019-08-09 | 北京碧泉盛达技术检测有限公司 | A kind of location structure being exclusively used in distance scaling instrument |
| CN111795888A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN111795889A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material stretching clamp with load and environment coupling effect and use method |
-
2018
- 2018-01-10 CN CN201820038834.5U patent/CN207703624U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596505A (en) * | 2018-11-27 | 2019-04-09 | 西安近代化学研究所 | A kind of large scale pressed explosives column hydrothermal aging test sample basket |
| CN109596505B (en) * | 2018-11-27 | 2021-07-27 | 西安近代化学研究所 | Sample basket for large-size press-fitting explosive column wet-heat aging test |
| CN110108527A (en) * | 2019-04-30 | 2019-08-09 | 北京碧泉盛达技术检测有限公司 | A kind of location structure being exclusively used in distance scaling instrument |
| CN110108527B (en) * | 2019-04-30 | 2021-06-29 | 北京碧泉盛达技术检测有限公司 | Positioning structure special for gauge length instrument |
| CN111795888A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN111795889A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material stretching clamp with load and environment coupling effect and use method |
| CN111795888B (en) * | 2020-07-17 | 2021-06-08 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN111795889B (en) * | 2020-07-17 | 2021-06-08 | 北京航空航天大学 | Composite material stretching clamp with load and environment coupling effect and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207703624U (en) | A kind of tensile sample supplemental measurement tool | |
| CN205941466U (en) | Universal fixturing of fixed measured workpiece among ultrasonic wave nondestructive test | |
| CN202166402U (en) | Residual deformation measuring device | |
| CN105352799B (en) | Double-tone fork-shaped elastomer tens(i)ometer and its measuring method | |
| CN105547837B (en) | A kind of soldered fitting fracture toughness test device | |
| CN210242695U (en) | Crankshaft axial dimension detection device | |
| CN109870355A (en) | Metal plate sample is uniaxially stretched elongation after fracture method for automatic measurement | |
| CN211740870U (en) | Adjusting structure for hydraulic stretching detection of metal material | |
| CN108731575A (en) | A kind of circular cross-section tensile sample dimension measuring device | |
| CN202522482U (en) | Extensometer for measuring yield strength of plate-shaped tensile test sample of pipeline steel | |
| CN208459149U (en) | A kind of displacement measuring device and testing machine suitable for material tensile test | |
| CN206862815U (en) | The nonmetallic multi-functional calibration clamp of hardometer | |
| CN206670520U (en) | Worm screw path device for fast detecting | |
| CN108562489A (en) | A kind of displacement measuring device and testing machine suitable for material tensile test | |
| CN210982024U (en) | Novel tensile testing machine for adhesive tape testing | |
| CN211824199U (en) | Detection apparatus for foraminiferous work piece internal diameter | |
| CN218566479U (en) | Lens fixing and thickness measuring device | |
| CN205403741U (en) | Shrinkage factor tester | |
| CN205981943U (en) | Metal material sample assistant measuring device | |
| CN216482698U (en) | Utensil is examined to flabellum external diameter size | |
| CN216646102U (en) | Special detection tool for detecting diamond test block | |
| CN208091809U (en) | Tensile test specimen scale distance measures specific purpose tool | |
| CN217541729U (en) | Detection tool for quickly detecting profile tolerance and position | |
| CN213748234U (en) | Inspection measuring tool for chain wheel machining | |
| CN109855511A (en) | The ditch heart distance measurement method of miniature thrust ball bearing washer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |