CN114018734A - Leather fatigue tester - Google Patents
Leather fatigue tester Download PDFInfo
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- CN114018734A CN114018734A CN202210013829.XA CN202210013829A CN114018734A CN 114018734 A CN114018734 A CN 114018734A CN 202210013829 A CN202210013829 A CN 202210013829A CN 114018734 A CN114018734 A CN 114018734A
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- leather
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- supporting seat
- clamping plate
- fatigue tester
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of leather detection, in particular to a leather fatigue tester which comprises a pressure testing part and a friction testing part, wherein the pressure testing part and the friction testing part respectively comprise a support, the support is connected with a base, the base is connected with a second clamping plate through a first clamping plate, the bottom end of the second clamping plate is connected with a connecting rod, the connecting rod sequentially penetrates through the first clamping plate and the base, a cross rod is connected with the connecting rod, a first air cylinder is arranged between the cross rod and the base, a screw is connected in a first screw hole formed in the base, a track is formed in the inner side of the base, the track is connected with a supporting block, and the screw is connected with the supporting block through a second screw hole. The invention can accurately reflect the fatigue test data of the worn leather, can test the leather with different sizes, and is convenient and efficient to use.
Description
Technical Field
The invention relates to the technical field of leather detection, in particular to a leather fatigue tester.
Background
With the gradual improvement of the quality of life, the requirements of people on the texture of clothing materials are improved, and the prior art generally uses manpower to pull the product for a certain number of times to detect whether the product is damaged, so that the manual detection efficiency is low, and the time and the labor are wasted; at present, a leather fatigue testing machine is used for carrying out fatigue testing on the leather; fatigue is a localized, permanent, incremental process of damage that occurs at a point in a material under cyclic loading conditions, and after sufficient stress or strain cycling, the accumulation of damage can cause the material to crack, or the crack can propagate further to complete failure. The occurrence of visible cracks or complete fractures is collectively referred to as fatigue failure, and thus a fatigue tester can be used to detect whether a product is damaged.
For example, chinese utility model patent No. CN202020740854.4 discloses a high performance leather stretching defect detecting apparatus, footing is installed at four corners of the bottom of the bracket, a power box is installed on the bottom surface of the bracket, an inclined panel is installed at the middle part of the bracket, leather pressing plates are installed at the top of the inclined panel and the lower part of the inclined plane of the inclined panel through cylinders, leather supporting rollers are installed at the upper part of the inclined plane of the inclined panel through cylinders, a control switch box is installed at the front side of the bracket, a control switch is arranged on the control switch box, the control switch box is located below the leather pressing plate at the lower part, a leather receiving box is installed at the rear side of the bracket, a lamp holder is installed at the top of the bracket, and an angle-adjustable illuminating lamp is installed on the lamp holder; the power box is respectively electrically connected with the control switch, the cylinder and the angle-adjustable illuminating lamp.
Although the detection equipment is simple to operate and the invalid working hours are greatly reduced, the leather cracks due to the jacking of the leather supporting roller in the use process, so that deviation occurs and the fatigue test of the leather is inaccurate, and on the other hand, the efficiency is low because workers still need to check the leather; meanwhile, leather with different sizes cannot be tested, the use is not convenient, and the efficiency is not high.
Disclosure of Invention
The invention provides a leather fatigue testing machine, which can accurately reflect the fatigue testing data of worn leather and can test leather with different sizes, and is convenient and efficient to use.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a leather fatigue tester comprises a pressure testing part and a friction testing part, wherein the pressure testing part and the friction testing part respectively comprise a support, the support is connected with a base, the base is connected with a second clamping plate through a first clamping plate, the bottom end of the second clamping plate is connected with a connecting rod, the connecting rod sequentially penetrates through the first clamping plate and the base, the connecting rod is connected with a cross rod, a first air cylinder is installed between the cross rod and the base, a screw is connected in a first screw hole formed in the base, a track is formed in the inner side of the base, the track is connected with a supporting block, and the screw is connected with the supporting block through a second screw hole;
leather is placed in the pressure testing part, a light metal strip is bonded in the middle of the bottom surface of the leather, a detection unit is arranged on the lower side of the leather, a first supporting seat is fixedly connected to the base, and a pressing block is connected to the middle of the first supporting seat through a second air cylinder;
leather has been placed in the friction test portion, fixedly connected with second supporting seat on the base of friction test portion, second supporting seat middle part is connected with the clutch blocks through the third cylinder, second supporting seat left side is connected with the light source through first dead lever, second supporting seat right side is connected with the receiver through the second dead lever.
As a further scheme of the invention, a plurality of first screw holes are formed in the base and are distributed at equal intervals.
As a further scheme of the invention, the included angle between the third cylinder and the middle part of the second supporting seat ranges from 30 degrees to 60 degrees.
As a further scheme of the invention, an included angle between the third cylinder and the middle part of the second supporting seat is 45 degrees.
As a further scheme of the invention, the detection unit and the light metal strip form a closed loop.
As a further aspect of the present invention, the material of the light metal strip is aluminum, iron, or copper.
As a further scheme of the invention, the length of the light metal strip is greater than or equal to the fracture of the detection unit.
As a further aspect of the present invention, the pressure testing portion and the friction testing portion are electrically connected to the controller, respectively.
As the technical scheme is adopted, the invention has the advantages and positive effects that:
1. the second cylinder in the middle of the first supporting seat drives the pressing block to circularly perform pressure test on the leather, so that the pressing in the use process can be simulated, and the fatigue damage of the leather is expressed when a closed loop is formed by the light metal strip and the detection unit;
2. and a third cylinder in the middle of the second supporting seat drives a friction block to circularly perform friction test on the leather. Friction during use can be simulated by the receiver receiving the difference in reflectance of the light source on the hide 22, expressed as a hide fatigue failure;
3. the supporting block can move in the track on the base, so that the fatigue test can be carried out on the leather with different sizes;
4. the invention can well reflect the pressure and friction fatigue test data of the leather through the telecommunication control of the controller and the received data processing, and has convenient and efficient use and good practicability.
Drawings
FIG. 1 is a top view of a leather fatigue tester of the present invention.
FIG. 2 is a front view of a leather fatigue tester of the present invention.
FIG. 3 is a left side view of a leather fatigue tester of the present invention.
Fig. 4 is a schematic structural diagram of the detection unit.
In the figure: 1 is pressure test portion, 2 is friction test portion, 3 is first splint, 4 is the second splint, 5 is the connecting rod, 6 is the horizontal pole, 7 is the first cylinder, 8 is the support, 9 is the base, 10 is the track, 11 is first screw, 12 is the screw, 13 is first supporting seat, 14 is first dead lever, 15 is the second supporting seat, 16 is the briquetting, 17 is the second dead lever, 18 is the second cylinder, 19 is the clutch blocks, 20 is the third cylinder, 21 is the detecting element, 22 is the leather, 23 is the light metal strip, 24 is the supporting shoe, 25 is the second screw.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, the leather fatigue tester comprises a pressure testing part 1 and a friction testing part 2, wherein the pressure testing part 1 and the friction testing part 2 respectively comprise a support 8, the support 8 is connected with a base 9, the base 9 is connected with a second clamping plate 4 through a first clamping plate 3, the bottom end of the second clamping plate 4 is connected with a connecting rod 5, the connecting rod 5 sequentially penetrates through the first clamping plate 3 and the base 9, the connecting rod 5 is connected with a cross rod 6, a first air cylinder 7 is arranged between the cross rod 6 and the base 9, a screw 12 is connected in a first screw hole 11 formed in the base 9, a track 10 is formed in the inner side of the base 9, the track 10 is connected with a supporting block 24, and the screw 12 is connected with the supporting block 24 through a second screw hole 25;
as can be seen from the above description, in use, the supporting block 24 is adjusted to a corresponding position according to the size of the leather 22, four sides of the leather 22 are respectively placed between the first clamping plate 3 and the second clamping plate 4, the first cylinder 7 operates to drive the cross bar 6 to move downwards, and further drive the connecting rod 5 and the second clamping plate 4 to move downwards, so that the leather 22 can be firmly fixed between the first clamping plate 3 and the second clamping plate 4; on the other hand, through the degree of first cylinder 7 pressurization, can simulate out the different mesh numbers on the leather 22 to can accurately detect the antifatigue strength of leather seam, use convenient high efficiency, the practicality is good.
as can be seen from the above description, the second cylinder 18 in the middle of the first supporting seat 13 drives the pressing block 16 to cyclically perform a pressure test on the leather 22, which can simulate the pressing during the use process, and when a closed loop is formed by the light metal strip 23 and the detecting unit 21, the fatigue failure of the leather 22 is indicated.
As can be seen from the above description, the third cylinder 20 in the middle of the second support seat 15 drives the friction block 19 to cyclically perform a friction test on the leather 22, which can simulate the friction during use, and receive the difference of the reflectivity of the light source irradiating on the leather 22 through the receiver, namely, the fatigue failure of the leather 22; the invention can well reflect the pressure and friction fatigue test data of the leather through the telecommunication control of the controller and the received data processing, and has convenient and efficient use and good practicability.
As a further scheme of the invention, a plurality of first screw holes 11 are formed in the base 9 and are distributed at equal intervals. As can be seen from the above description, the first screw holes 11 which are distributed on the base 9 at equal intervals can be adjusted according to the leather 22 with different sizes, so that the fatigue damage degree of the leather 22 under different sizes can be comprehensively analyzed, the use is convenient and efficient, and the practicability is good.
As a further scheme of the invention, the included angle between the third cylinder 20 and the middle part of the second support seat 15 ranges from 30 degrees to 60 degrees. According to the above description, when the friction block 19 is driven by the third air cylinder 20 arranged at 30-60 degrees to rub the leather 22, the setting angle can be adjusted according to the test requirement, so that the leather 22 can be rubbed well, and the leather rubbing machine is convenient and efficient to use and good in practicability.
As a further scheme of the present invention, the included angle between the third cylinder 20 and the middle portion of the second support seat 15 is 45 °. As can be seen from the above description, when the third cylinder 20 arranged at 45 degrees drives the friction block 19 to rub on the leather 22, the leather 22 can be rubbed uniformly, the abrasion of the leather 22 after rubbing is reflected practically, and the use is convenient and efficient.
As a further variant of the invention, the detection unit 21 forms a closed circuit with a lightweight metal strip 23, as shown in fig. 4. As can be seen from the above description, when the leather 22 drives the light metal strip 23 to move downwards at a certain time, the light metal strip 23 and the detection unit 21 form a closed loop, and a bulb in the closed loop is lighted up, that is, this time, the leather 22 is fatigue-damaged, and the practicability is good.
As a further aspect of the present invention, the material of the light metal strip 23 is aluminum, iron or copper. As can be seen from the above description, metals such as aluminum, iron, or copper have good electrical conductivity.
As a further aspect of the present invention, the length of the light metal strip 23 is greater than or equal to the fracture of the detection unit 21. As can be seen from the above description, when the leather 22 drives the light metal strip 23 to move downwards at a certain time, a closed loop can be formed well with the detection unit 21, and the usage is convenient and efficient.
As a further aspect of the present invention, the pressure testing part 1 and the friction testing part 2 are respectively electrically connected to the controller. From the above description, the pressure and friction fatigue test data of the leather can be well and comprehensively reflected through the telecommunication control of the controller and the received data processing, and the leather friction fatigue test device is convenient and efficient to use and good in practicability.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (8)
1. A leather fatigue tester is characterized in that: the tester comprises a pressure testing part (1) and a friction testing part (2), the pressure testing part (1) and the friction testing part (2) respectively comprise a bracket (8), the bracket (8) is connected with a base (9), the base (9) is connected with a second clamping plate (4) through a first clamping plate (3), the bottom end of the second clamping plate (4) is connected with a connecting rod (5), the connecting rod (5) sequentially penetrates through the first clamping plate (3) and the base (9), the connecting rod (5) is connected with a cross rod (6), a first air cylinder (7) is arranged between the cross rod (6) and a base (9), a screw (12) is connected in a first screw hole (11) formed on the base (9), the inner side of the base (9) is provided with a track (10), the track (10) is connected with a supporting block (24), the screw (12) is connected with the supporting block (24) through a second screw hole (25);
leather (22) is placed in the pressure testing part (1), a light metal strip (23) is bonded in the middle of the bottom surface of the leather (22), a detection unit (21) is arranged on the lower side of the leather (22), a first supporting seat (13) is fixedly connected to the base (9), and a pressing block (16) is connected to the middle of the first supporting seat (13) through a second air cylinder (18);
leather (22) have been placed in friction test portion (2), fixedly connected with second supporting seat (15) on base (9) of friction test portion (2), second supporting seat (15) middle part is connected with clutch blocks (19) through third cylinder (20), second supporting seat (15) left side is connected with the light source through first dead lever (14), second supporting seat (15) right side is connected with the receiver through second dead lever (17).
2. The leather fatigue tester of claim 1, wherein: a plurality of first screw holes (11) are formed in the base (9) and are distributed at equal intervals.
3. The leather fatigue tester of claim 1, wherein: the included angle between the third air cylinder (20) and the middle part of the second supporting seat (15) ranges from 30 degrees to 60 degrees.
4. A leather fatigue tester as claimed in claim 3, wherein: the included angle between the third cylinder (20) and the middle part of the second supporting seat (15) is 45 degrees.
5. The leather fatigue tester of claim 1, wherein: the detection unit (21) and the light metal strip (23) form a closed loop.
6. The leather fatigue tester of claim 5, wherein: the light metal strip (23) is made of aluminum, iron or copper.
7. The leather fatigue tester of claim 5, wherein: the length of the light metal strip (23) is more than or equal to the fracture of the detection unit (21).
8. The leather fatigue tester of claim 1, wherein: the pressure testing part (1) and the friction testing part (2) are respectively electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013829.XA CN114018734B (en) | 2022-01-07 | 2022-01-07 | Leather fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013829.XA CN114018734B (en) | 2022-01-07 | 2022-01-07 | Leather fatigue tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114018734A true CN114018734A (en) | 2022-02-08 |
| CN114018734B CN114018734B (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210013829.XA Active CN114018734B (en) | 2022-01-07 | 2022-01-07 | Leather fatigue tester |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU737811A1 (en) * | 1977-03-29 | 1980-05-30 | 811 | Method of testing for friction fatigue |
| KR101381808B1 (en) * | 2012-11-21 | 2014-04-07 | 한양대학교 산학협력단 | High temperature and high pressure water environmental fatigue test apparatus, method for correcting and measuring fatigue load using the same |
| CN204988747U (en) * | 2015-09-18 | 2016-01-20 | 天津市嘉美特自行车有限公司 | Saddle fatigue test machine |
| CN105823677A (en) * | 2016-06-11 | 2016-08-03 | 贵州大学 | Method and device for controlling abrasion and rotation in multi-load fatigue life testing process |
| CN205643062U (en) * | 2016-04-29 | 2016-10-12 | 泉州市杰斯特仪器设备有限公司 | Surface fabric leather wearing and tearing tester |
| CN107063912A (en) * | 2017-06-28 | 2017-08-18 | 浙江深梦皮革科技有限公司 | A kind of wearability test machine of leather |
| CN207610852U (en) * | 2017-12-29 | 2018-07-13 | 东莞市博皓电子科技有限公司 | A kind of silica gel push-button pressing fatigue tester |
| CN109540698A (en) * | 2019-01-09 | 2019-03-29 | 深圳天祥质量技术服务有限公司 | Torque fatigue test device and method |
| CN110208125A (en) * | 2019-06-19 | 2019-09-06 | 中国科学院金属研究所 | A kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method |
| CN110470541A (en) * | 2019-09-12 | 2019-11-19 | 珠海罗西尼表业有限公司 | The detection method of leather watchband pliability |
| CN211652414U (en) * | 2019-12-30 | 2020-10-09 | 广东能标检测技术服务有限公司 | Leather color fastness tester |
| CN211904968U (en) * | 2020-02-21 | 2020-11-10 | 乔山健康科技(上海)有限公司 | Leather wear-resisting life testing device |
| CN212060264U (en) * | 2020-05-08 | 2020-12-01 | 柏德皮革(中国)有限公司 | High-performance leather stretching defect detection equipment |
| CN212206960U (en) * | 2020-04-02 | 2020-12-22 | 山东保航机械设备制造有限公司 | High-temperature rolling thermal fatigue friction wear testing machine |
| CN112198072A (en) * | 2020-07-23 | 2021-01-08 | 大连理工大学 | Fatigue testing device for mutual coupling of friction wear and alternating stress |
| CN214668143U (en) * | 2021-04-06 | 2021-11-09 | 自贡成华汽车零部件有限公司 | Leather durability testing machine |
-
2022
- 2022-01-07 CN CN202210013829.XA patent/CN114018734B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU737811A1 (en) * | 1977-03-29 | 1980-05-30 | 811 | Method of testing for friction fatigue |
| KR101381808B1 (en) * | 2012-11-21 | 2014-04-07 | 한양대학교 산학협력단 | High temperature and high pressure water environmental fatigue test apparatus, method for correcting and measuring fatigue load using the same |
| CN204988747U (en) * | 2015-09-18 | 2016-01-20 | 天津市嘉美特自行车有限公司 | Saddle fatigue test machine |
| CN205643062U (en) * | 2016-04-29 | 2016-10-12 | 泉州市杰斯特仪器设备有限公司 | Surface fabric leather wearing and tearing tester |
| CN105823677A (en) * | 2016-06-11 | 2016-08-03 | 贵州大学 | Method and device for controlling abrasion and rotation in multi-load fatigue life testing process |
| CN107063912A (en) * | 2017-06-28 | 2017-08-18 | 浙江深梦皮革科技有限公司 | A kind of wearability test machine of leather |
| CN207610852U (en) * | 2017-12-29 | 2018-07-13 | 东莞市博皓电子科技有限公司 | A kind of silica gel push-button pressing fatigue tester |
| CN109540698A (en) * | 2019-01-09 | 2019-03-29 | 深圳天祥质量技术服务有限公司 | Torque fatigue test device and method |
| CN110208125A (en) * | 2019-06-19 | 2019-09-06 | 中国科学院金属研究所 | A kind of high-temperature high pressure water fretting fatigue normal pressure bringing device and its application method |
| CN110470541A (en) * | 2019-09-12 | 2019-11-19 | 珠海罗西尼表业有限公司 | The detection method of leather watchband pliability |
| CN211652414U (en) * | 2019-12-30 | 2020-10-09 | 广东能标检测技术服务有限公司 | Leather color fastness tester |
| CN211904968U (en) * | 2020-02-21 | 2020-11-10 | 乔山健康科技(上海)有限公司 | Leather wear-resisting life testing device |
| CN212206960U (en) * | 2020-04-02 | 2020-12-22 | 山东保航机械设备制造有限公司 | High-temperature rolling thermal fatigue friction wear testing machine |
| CN212060264U (en) * | 2020-05-08 | 2020-12-01 | 柏德皮革(中国)有限公司 | High-performance leather stretching defect detection equipment |
| CN112198072A (en) * | 2020-07-23 | 2021-01-08 | 大连理工大学 | Fatigue testing device for mutual coupling of friction wear and alternating stress |
| CN214668143U (en) * | 2021-04-06 | 2021-11-09 | 自贡成华汽车零部件有限公司 | Leather durability testing machine |
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| Publication number | Publication date |
|---|---|
| CN114018734B (en) | 2022-03-08 |
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