CN112798407B - Experimental table for testing strength of bearing steel ball with automatic rotation test surface - Google Patents
Experimental table for testing strength of bearing steel ball with automatic rotation test surface Download PDFInfo
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- CN112798407B CN112798407B CN202011602609.8A CN202011602609A CN112798407B CN 112798407 B CN112798407 B CN 112798407B CN 202011602609 A CN202011602609 A CN 202011602609A CN 112798407 B CN112798407 B CN 112798407B
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- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 71
- 239000010959 steel Substances 0.000 title claims abstract description 71
- 238000002474 experimental method Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G01N3/04—Chucks
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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
- G01N2203/0276—Spherical specimens
-
- 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
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0411—Chucks, fixtures, jaws, holders or anvils using pneumatic or hydraulic pressure
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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 discloses an experiment table for testing the strength of a bearing steel ball of an automatic rotation test surface, which comprises a base, wherein an L-shaped plate is fixedly connected to the base, an air hammer is fixedly connected to the bottom of the L-shaped plate, a strength test block is fixedly connected to the output end of the air hammer, a sliding groove is arranged on the base, a sliding plate is connected in a sliding manner in the sliding groove, a reciprocating screw rod is connected to the inner wall of the sliding groove in a rotating manner, the reciprocating screw rod penetrates through the sliding plate and is connected with the sliding plate in a matched manner, and a rotating rod is fixedly connected to the other end of the reciprocating screw rod and penetrates through the base and is connected with the rotating rod in a rotating manner. The steel ball testing device is reasonable in structure, the air hammer is used for providing power, the steel ball can be stably clamped, the steel ball is not easy to move, the safety degree in the testing process is higher, meanwhile, the steel ball can be rotated, the steel ball can be tested for multiple positions in strength, the strength testing block is propped against the top of the steel ball, and the steel ball testing is more stable.
Description
Technical Field
The invention relates to the technical field of test tables, in particular to a test table for testing the strength of a bearing steel ball with an automatic rotating test surface.
Background
The bearing component comprises a positioning ring, a buckling plate, a steel ball and the like, wherein the steel ball and the positioning ring realize rolling and rotating actions under the sliding fit action of the bearing, and meanwhile, in some environments, a shaft rod part connected with the bearing can bear larger acting force, so that the strength of the steel ball forming the bearing is a decisive factor for determining the strength adaptability of the bearing applied to the environment, and the strength test of the steel ball part forming the bearing is important before the bearing is assembled.
The experimental machine for testing the strength of the steel ball is mainly air hammer equipment, when the experimental machine is applied, the steel ball is placed on an air hammer experiment table, an air hammer impact head with a certain pressure is regulated to fall down and smash the steel ball, namely, one-time strength experiment detection is completed, and the degree of deformation of the steel ball after being smash-pressed is watched at the moment, so that the capacity of bearing the pressure of the steel ball is judged.
At present, the air hammer experiment table in the prior art is single in surface structure and is mostly of a horizontal table surface structure, after an actual air hammer falls down and hits a steel ball to be tested, the steel ball can fall down due to the fact that a reasonable limiting mechanism is absent, the steel ball is detected to be compressive strength, the impact force born by the steel ball is mostly in one direction, the impact of all-round parts of the steel ball cannot be detected, therefore the existing air hammer experiment table is used for carrying out impact experiments on the steel ball with better rolling property, the defects are overcome, and therefore the experiment table for testing the strength of the bearing steel ball with an automatic rotation test surface is designed to solve the problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the experiment table for testing the strength of the bearing steel ball, which is capable of automatically rotating a test surface, not only can realize stable clamping of the steel ball and ensure that the steel ball is not easy to move, but also can realize the rotation of the steel ball, realize the test of multiple strength of the steel ball, ensure that a strength test block is propped against the top of the steel ball, and ensure that the test of the steel ball is more stable.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides an automatic bearing steel ball intensity test of rotating test surface uses laboratory bench, includes the base, fixedly connected with L template on the base, the bottom fixedly connected with air hammer of L template, the output fixedly connected with intensity test piece of air hammer, be equipped with the sliding tray on the base, sliding connection has the sliding plate in the sliding tray, the inner wall rotation of sliding tray is connected with reciprocating screw, reciprocating screw runs through the sliding plate and rather than the cooperation is connected, the other end fixedly connected with dwang of reciprocating screw, the dwang runs through the base and rotates with it to be connected, fixedly connected with two first risers and two second risers on the base, two the relative one side of first riser all is equipped with the arcwall face, two the second riser is located the both sides of two first risers, and two the equal fixedly connected with diaphragm of one side of second riser, and homonymy fixedly connected with first spring between first riser and the second riser, the reciprocating screw runs through the base and is connected with the dwang and rotates with it, fixedly connected with the hollow piston rod on the hollow cylinder has the guide cylinder, the hollow piston is equipped with the hollow cylinder, installs the hollow piston is connected with on the hollow cylinder.
Preferably, the driving mechanism comprises an L-shaped rod fixed at the output end of the air hammer, a storage groove is formed in the bottom of the L-shaped rod, a driving rod is connected in the storage groove in a sliding mode, a second spring is fixedly connected between the driving rod and the inner top of the storage groove, a right trapezoid block is fixedly connected to the first vertical plate, the driving rod abuts against the right trapezoid block and the second vertical plate, and the driving rod is located right above the transverse plate.
Preferably, the lower end of the opposite surface of the driving rod and the right trapezoid block is provided with a wedge surface, and the wedge surface is matched with the right trapezoid block.
Preferably, the transmission mechanism comprises a vertical rod fixed on the hollow cylinder, a transmission gear is mounted on the vertical rod, the output end of the air hammer is fixedly connected with a cross rod, the bottom of the cross rod is fixedly connected with a first rack plate, the first rack plate is meshed with the transmission gear, the upper end of the guide rod is fixedly connected with a second rack plate, and the second rack plate is meshed with the transmission gear.
Preferably, the blowing mechanism comprises an L-shaped pipe fixed on the hollow cylinder, a pressure valve is arranged on the L-shaped pipe, a round block is connected with a fixed rod on the rotating rod, four fixed plates are fixedly connected to the round block, the L-shaped pipe is arranged opposite to the fixed plates, and the L-shaped pipe is located on one side of the round block.
Preferably, four of the fixing plates are uniformly formed on the round block, and the four fixing plates are connected with the round block by welding.
Preferably, the one-way valve is an air inlet one-way valve.
Preferably, the first rack plate is located at one side of the hollow cylinder, and the first rack plate does not abut against the hollow cylinder.
Compared with the prior art, the invention has the beneficial effects that:
The air hammer drives the output end and the strength test block to move downwards, meanwhile, the output end drives the two L-shaped rods to move downwards, the L-shaped rods move downwards to drive the driving rods to move downwards and prop against the right trapezoid blocks, the two right trapezoid blocks move relatively under the limit of the wedge-shaped surface, so that the two first vertical plates move relatively to clamp the steel ball, the output end drives the strength test block to move downwards continuously, the second spring is compressed, and the strength test block can test the strength of the steel ball;
When the output end moves upwards, the driving rod does not limit the right trapezoid blocks, under the action of the first springs, the two first vertical plates move relatively, the piston is stressed downwards, so that air can be pressed to the L-shaped pipe, when the output end moves upwards, the pressure valve is opened, the air is blown to the fixed plate, rotation with the round block, the rotating rod and the reciprocating screw rod is realized, movement of the sliding plate is realized, rolling of the steel ball can be realized by movement of the sliding plate, and when the output end moves downwards continuously, the upper end face of the clamped steel ball changes, so that strength test can be performed on different positions of the steel ball;
the strength test can be performed on different positions of the steel ball without manual operation for clamping and surface changing.
In summary, the steel ball testing device is reasonable in structure, the pneumatic hammer is used for providing power, the steel ball can be stably clamped, the steel ball is not easy to move, the safety degree in the testing process is higher, meanwhile, the steel ball can be rotated, the steel ball can be tested for multiple strength, the strength testing block is propped against the top of the steel ball, and the steel ball testing is more stable.
Drawings
Fig. 1 is a schematic structural diagram of an experimental bench for testing the strength of a bearing steel ball with an automatic rotation test surface;
FIG. 2 is a top view of a base in an experiment table for testing the strength of a bearing steel ball with an automatic rotation test surface, which is provided by the invention;
FIG. 3 is a schematic structural diagram of a second vertical plate and a horizontal plate in an experiment table for testing the strength of a bearing steel ball with an automatic rotation test surface;
FIG. 4 is a side view of a round block and an L-shaped tube in an experiment table for testing the strength of a bearing steel ball with an automatic rotation test surface;
fig. 5 is a schematic structural diagram of a receiving slot in a test stand for testing strength of a bearing steel ball with an automatic rotation test surface according to the present invention.
In the figure: 1 base, 2L template, 3 air hammer, 4 output, 5 intensity test block, 6L type pole, 7 sliding tray, 8 sliding tray, 9 reciprocating lead screw, 10 actuating lever, 11 first riser, 12 right trapezoid piece, 13 second riser, 14 first spring, 15 wedge face, 16 arcwall face, 17 storage tank, 18 second spring, 19 horizontal pole, 20 first rack board, 21 montant, 22 drive gear, 23 second rack board, 24 guide bar, 25 piston, 26 nozzle stub, 27 check valve, 28L type pipe, 29 pressure valve, 30 dwang, 31 circle piece, 32 fixed plate, 33 diaphragm.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-5, an experiment table for testing the strength of a bearing steel ball of an automatic rotation test surface comprises a base 1, wherein an L-shaped plate 2 is fixedly connected to the base 1, an air hammer 3 is fixedly connected to the bottom of the L-shaped plate 2, an intensity test block 5 is fixedly connected to an output end 4 of the air hammer 3, a sliding groove 7 is arranged on the base 1, a sliding plate 8 is connected in a sliding manner in the sliding groove 7, a reciprocating screw rod 9 is rotatably connected to the inner wall of the sliding groove 7, the reciprocating screw rod 9 penetrates through the sliding plate 8 and is in matched connection with the sliding plate, a rotating rod 30 is fixedly connected to the other end of the reciprocating screw rod 9, the rotating rod 30 penetrates through the base 1 and is in rotary connection with the base 1, two first vertical plates 11 and two second vertical plates 13 are fixedly connected to the base 1, an arc surface 16 is arranged on one surface opposite to the two first vertical plates 11, and the steel ball can be clamped and limited through the matching of the two first vertical plates 11 and the arc surface 16.
The two second risers 13 are located the both sides of two first risers 11, and the equal fixedly connected with diaphragm 33 of the opposite one side of two second risers 13, and fixedly connected with first spring 14 between the first riser 11 of homonymy and the second riser 13, first spring 14 is in response to the reset of first riser 11, so no longer carries out the centre gripping to the steel ball, can rotate the steel ball, can test different faces.
The driving mechanism is arranged at the output end 4 of the air hammer 3, the driving mechanism comprises an L-shaped rod 6 fixed at the output end 4 of the air hammer 3, a containing groove 17 is formed in the bottom of the L-shaped rod 6, a driving rod 10 is connected in the containing groove 17 in a sliding mode, a second spring 18 is fixedly connected between the driving rod 10 and the inner top of the containing groove 17, a right trapezoid block 12 is fixedly connected to the first vertical plate 11, the driving rod 10 abuts against the right trapezoid block 12 and the second vertical plate 13, and the driving rod 10 is located right above the right trapezoid block 33; the lower end of the opposite surface of the driving rod 10 to the right trapezoid block 12 is provided with a wedge surface 15, and the wedge surface 15 is matched with the right trapezoid block 12.
The base 1 is fixedly connected with a hollow cylinder, the piston 25 is connected with the hollow cylinder in a sliding mode, the upper end of the piston 25 is fixedly connected with the guide rod 24, a transmission mechanism is arranged between the guide rod 24 and the output end 4 of the air hammer 3, the transmission mechanism comprises a vertical rod 21 fixed on the hollow cylinder, a transmission gear 22 is arranged on the vertical rod 21, the output end 4 of the air hammer 3 is fixedly connected with a cross rod 19, the bottom of the cross rod 19 is fixedly connected with a first rack plate 20, the first rack plate 20 is meshed with the transmission gear 22, the upper end of the guide rod 24 is fixedly connected with a second rack plate 23, the second rack plate 23 is meshed with the transmission gear 22, the first rack plate 20 is positioned on one side of the hollow cylinder, and the first rack plate 20 is not propped against the hollow cylinder.
A short pipe 26 is arranged on the hollow cylinder, a one-way valve 27 is arranged on the short pipe 26, and the one-way valve 27 is an air inlet one-way valve; a blowing mechanism is arranged between the hollow cylinder and the rotating rod 30, the blowing mechanism comprises an L-shaped pipe 28 fixed on the hollow cylinder, a pressure valve 29 is arranged on the L-shaped pipe 28, a round block 31 is connected to the rotating rod 30 through a fixing rod, four fixing plates 32 are fixedly connected to the round block 31, the L-shaped pipe 28 and the fixing plates 32 are oppositely arranged, the L-shaped pipe 28 is located on one side of the round block 31, the four fixing plates 32 are uniformly distributed on the round block 31, and the four fixing plates 32 are connected with the round block 31 through welding.
In the invention, when the steel ball is subjected to strength test, a person places the steel ball on the sliding plate 8 and is positioned between two arc surfaces 16, then the worker starts the air hammer 3, the air hammer 3 drives the output end 4 and the strength test block 5 to move downwards, meanwhile, the output end 4 drives the two L-shaped rods 6 to move downwards, the L-shaped rods 6 move downwards to drive the driving rods 10 to move downwards and prop against the right trapezoid blocks 12, and under the limit of the wedge surface 15, the two right trapezoid blocks 12 move relatively, so that the two first vertical plates 11 move relatively, the steel ball is clamped, the output end 4 drives the strength test block 5 to move downwards continuously, and the second spring 18 is compressed, so that the strength test block 5 can perform strength test on the steel ball;
Simultaneously, the output end 4 drives the cross rod 19 and the first rack plate 20 to move downwards, and the second rack plate 23 can move upwards under the transmission of the transmission gear 22, so that the guide rod 24 and the piston 25 move upwards, and air enters the hollow cylinder through the short pipe 26 to realize air intake;
When the output end 4 moves upwards, the driving rod 10 does not limit the right trapezoid block 12 any more, under the action of the first springs 14, the two first vertical plates 11 move relatively, the piston 25 downwards corresponds, so that air can be pressed to the L-shaped pipe 28, as the output end 4 moves upwards, the pressure valve 29 is opened, the air blows to the fixed plate 32, so that the rotation with the round block 31, the rotating rod 30 and the reciprocating screw rod 9 is realized, the sliding plate 8 moves to realize rolling of the steel ball, and when the output end 4 moves downwards continuously, the upper end face of the clamped steel ball changes, so that strength test can be performed on different positions of the steel ball;
the strength test can be performed on different positions of the steel ball without manual operation for clamping and surface changing.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides an automatic bearing steel ball intensity test of rotating test surface uses laboratory bench, includes base (1), its characterized in that, fixedly connected with L template (2) on base (1), the bottom fixedly connected with air hammer (3) of L template (2), output (4) fixedly connected with intensity test piece (5) of air hammer (3), be equipped with sliding tray (7) on base (1), sliding tray (7) sliding connection has sliding plate (8), sliding tray (7)'s inner wall rotates and is connected with reciprocating lead screw (9), reciprocating lead screw (9) run through sliding plate (8) and rather than the cooperation connection, reciprocating lead screw (9) other end fixedly connected with dwang (30), dwang (30) run through base (1) and rather than swivelling connection, fixedly connected with two first riser (11) and two second riser (13) on base (1), two first riser (11) are relative all are equipped with face (16), two second riser (13) are located two first riser (13) and two both sides are connected with first riser (13) and two opposite side (13), the driving mechanism is arranged at the output ends (4) of the first vertical plate (11), the transverse plate (33) and the air hammer (3) on the same side, a hollow cylinder is fixedly connected to the base (1), a piston (25) is slidably connected to the hollow cylinder, a guide rod (24) is fixedly connected to the upper end of the piston (25), a transmission mechanism is arranged between the guide rod (24) and the output end (4) of the air hammer (3), a short pipe (26) is arranged on the hollow cylinder, a one-way valve (27) is arranged on the short pipe (26), and a blowing mechanism is arranged between the hollow cylinder and the rotating rod (30);
The driving mechanism comprises an L-shaped rod (6) fixed at the output end (4) of the air hammer (3), a storage groove (17) is formed in the bottom of the L-shaped rod (6), a driving rod (10) is connected in a sliding mode in the storage groove (17), a second spring (18) is fixedly connected between the driving rod (10) and the inner top of the storage groove (17), a right trapezoid block (12) is fixedly connected with the first vertical plate (11), the driving rod (10) is propped against the right trapezoid block (12) and the second vertical plate (13), and the driving rod (10) is located right above the transverse plate (33);
The lower end of the opposite surface of the driving rod (10) to the right trapezoid block (12) is provided with a wedge surface (15), and the wedge surface (15) is matched with the right trapezoid block (12).
2. The experiment table for testing the strength of the bearing steel ball of the automatic rotation testing surface according to claim 1, wherein the transmission mechanism comprises a vertical rod (21) fixed on a hollow cylinder, a transmission gear (22) is installed on the vertical rod (21), a cross rod (19) is fixedly connected to an output end (4) of the air hammer (3), a first rack plate (20) is fixedly connected to the bottom of the cross rod (19), the first rack plate (20) is meshed with the transmission gear (22), a second rack plate (23) is fixedly connected to the upper end of the guide rod (24), and the second rack plate (23) is meshed with the transmission gear (22).
3. The experiment table for testing the strength of the bearing steel ball with the automatic rotation testing surface according to claim 1, wherein the blowing mechanism comprises an L-shaped pipe (28) fixed on a hollow cylinder, a pressure valve (29) is installed on the L-shaped pipe (28), a round block (31) is connected to a fixed rod on a rotating rod (30), four fixing plates (32) are fixedly connected to the round block (31), the L-shaped pipe (28) is arranged opposite to the fixing plates (32), and the L-shaped pipe (28) is located on one side of the round block (31).
4. A test bench for testing the strength of a bearing steel ball with an automatic rotation test surface according to claim 3, characterized in that four fixing plates (32) are uniformly distributed on the round block (31), and the four fixing plates (32) are connected with the round block (31) by welding.
5. The test bench for testing the strength of the bearing steel ball with the automatic rotation test surface according to claim 1, wherein the one-way valve (27) is an air inlet one-way valve.
6. The test bench for testing the strength of the bearing steel ball of the automatic rotation test surface according to claim 2, wherein the first rack plate (20) is positioned at one side of the hollow cylinder, and the first rack plate (20) is not abutted against the hollow cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602609.8A CN112798407B (en) | 2020-12-29 | 2020-12-29 | Experimental table for testing strength of bearing steel ball with automatic rotation test surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011602609.8A CN112798407B (en) | 2020-12-29 | 2020-12-29 | Experimental table for testing strength of bearing steel ball with automatic rotation test surface |
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| CN112798407A CN112798407A (en) | 2021-05-14 |
| CN112798407B true CN112798407B (en) | 2024-05-28 |
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| CN202011602609.8A Active CN112798407B (en) | 2020-12-29 | 2020-12-29 | Experimental table for testing strength of bearing steel ball with automatic rotation test surface |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447373B (en) * | 2021-06-03 | 2022-08-02 | 山东金池重工股份有限公司 | Wear-resistant steel ball impact toughness testing machine |
| CN113848126A (en) * | 2021-09-24 | 2021-12-28 | 河南省育兴建设工程管理有限公司 | Building concrete strength detection device and method |
| CN115265997A (en) * | 2022-09-29 | 2022-11-01 | 江苏云博智能科技有限公司 | Spare part strength test device based on intelligence is made |
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| JP2006184169A (en) * | 2004-12-28 | 2006-07-13 | Jfe Steel Kk | Rolling fatigue evaluation method of steel ball for bearing, and thrust type rolling fatigue tester |
| CN202075190U (en) * | 2011-03-01 | 2011-12-14 | 意力(广州)电子科技有限公司 | Steel ball drop test device for testing glass strength of touch screen |
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| CN211740943U (en) * | 2020-03-25 | 2020-10-23 | 吴金通 | Be used for glass strength test platform |
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| US6952969B2 (en) * | 2003-09-30 | 2005-10-11 | The Aerospace Corporation | Ceramic ball bearing fracture test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0643549U (en) * | 1992-09-28 | 1994-06-10 | 中外商工株式会社 | Falling ball impact tester |
| JP2006184169A (en) * | 2004-12-28 | 2006-07-13 | Jfe Steel Kk | Rolling fatigue evaluation method of steel ball for bearing, and thrust type rolling fatigue tester |
| CN202075190U (en) * | 2011-03-01 | 2011-12-14 | 意力(广州)电子科技有限公司 | Steel ball drop test device for testing glass strength of touch screen |
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| CN110987668A (en) * | 2019-10-15 | 2020-04-10 | 丁正旺 | Experiment table mechanism for bearing steel ball strength test |
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| CN111504831A (en) * | 2020-05-27 | 2020-08-07 | 河南科技大学 | Bearing steel ball friction and wear performance test bed, test frame and test method |
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| CN112798407A (en) | 2021-05-14 |
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