CN118130276A - Impact rotary wear testing machine - Google Patents

Abstract

The application relates to an impact rotary wear testing machine, in particular to an impact rotary wear testing machine, which comprises a loading device, an impact device, a wear device and a sample seat for fixing a second sample, wherein the impact device is used for providing repeated impact for the second sample, the wear device is used for driving a first sample to rotate so as to generate friction with the second sample, and the loading device is used for providing pressure for the second sample; the loading device comprises a first driving mechanism, a first sliding seat and a first detection piece, wherein the first driving mechanism can drive the first sliding seat to move and enable the first sliding seat to be abutted against the first detection piece, and the first detection piece is used for detecting the pressure applied to the second sample; the impact force of the impact device acts on the first sliding seat and the impact device can synchronously move with the first sliding seat. The application can increase the accuracy of the detection result of the impact rotary wear testing machine.

Description

Impact rotary wear testing machine

Technical Field

The application relates to the technical field of test equipment, in particular to an impact rotary wear testing machine.

Background

The mechanical properties of the material of the workpiece refer to the resistance of the workpiece material to deformation or damage under the action of external force, and generally include the strength, plasticity, elasticity, brittleness, fracture toughness, hardness and other properties of the material. In general, in the process of researching and exploring new materials, new processes, new technologies and new structures, a testing machine is required to be used for measuring the mechanical properties of materials of a workpiece so as to effectively ensure the quality, the safety, the reliability and the like of the workpiece. Therefore, the tester is widely applied to industries such as machinery, metallurgy, aerospace and the like.

At present, a common testing machine mainly can carry out frictional wear detection, and a motor drives a sample to rotate, so that the sample rubs with other articles, and the abrasion resistance of the sample is detected. However, when the sample is worn, a certain gap is generated between the sample and the article in contact with the sample, so that the detection result of the sample is inaccurate.

Disclosure of Invention

The application aims to provide an impact rotary wear testing machine, which can increase the accuracy of the detection result of the impact rotary wear testing machine.

The application provides an impact rotary wear testing machine which adopts the following technical scheme:

The impact rotary wear testing machine comprises a loading device, an impact device, a wear device and a sample seat, wherein the sample seat is used for fixing a second sample, the impact device is used for providing repeated impact for the second sample, the wear device is used for driving a first sample to rotate so as to generate friction with the second sample, and the loading device is used for providing pressure for the second sample;

The loading device comprises a first driving mechanism, a first sliding seat and a first detection piece, wherein the first driving mechanism can drive the first sliding seat to move and enable the first sliding seat to be in butt joint with the first detection piece, and the first detection piece is used for detecting the pressure born by a second sample;

The impact force of the impact device acts on the first sliding seat and the impact device can synchronously move with the first sliding seat.

Through adopting above-mentioned technical scheme, last promotion second sample through loading device to make contact between second sample and the first sample inseparabler, and when first sample and second sample take place wearing and tearing, loading device can promote the second sample and remove, makes second sample and first sample continuously paste tightly, thereby makes experimental detection more accurate.

And in the friction process, impact experiments are carried out simultaneously, and the actual use scene of the first sample and the second sample is simulated, so that the detected data are more fit with the actual data, and the experimental data are more accurate.

Optionally, the impact device includes second actuating mechanism and second sliding seat, second actuating mechanism can drive the second sliding seat is in first sliding seat direction of movement is reciprocating motion, second sliding seat with be provided with the elastic component between the first sliding seat, elastic component one end is acted on the second sliding seat, the elastic component other end is acted on the first sliding seat.

By adopting the technical scheme, the second sliding seat is driven to move through the arrangement of the second driving mechanism, so that the second sliding seat reciprocates, the elastic piece is compressed, the elastic piece is repeatedly contracted, the second sample is repeatedly impacted, and the impact resistance of the second sample is detected;

And when the abrasion device runs, because the end surfaces of the first sample and the second sample which are in contact with each other can have high points and low points, when the first sample and the second sample rotate with each other, larger noise can be generated, and a buffer space is reserved by arranging the elastic piece, so that noise is reduced.

Optionally, the second actuating mechanism includes driving piece, eccentric shaft and connecting rod, eccentric shaft fixed connection is in on the output shaft of driving piece, the eccentric shaft axis with the axis of the output shaft of driving piece staggers each other, connecting rod one end with the eccentric shaft articulates, the connecting rod other end with the second sliding seat articulates.

Through adopting above-mentioned technical scheme, drive the connecting rod through the setting and remove to realize that the second sliding seat carries out reciprocating motion, compare and use electric putter to promote the second sliding seat and carry out reciprocating motion directly, adopt the eccentric shaft to drive the mode that the connecting rod removed, its driving piece can set up in one side of second sliding seat, and need not to place the driving piece in second sliding seat below, thereby reduced the whole length of impact rotation abrasion testing machine.

Optionally, the abrasion device comprises a third driving mechanism and a main shaft, wherein the third driving mechanism drives the main shaft to rotate, and the main shaft can be connected with the first sample and can drive the first sample to rotate.

Through adopting above-mentioned technical scheme, through the main shaft rotation, drive first sample and rotate, realize the mutual friction between first sample and the second sample to detect the abrasion resistance of first sample and second sample.

Optionally, the third actuating mechanism includes driving pulley, driven pulley and drive belt, driven pulley with main shaft fixed connection, the drive belt overlaps respectively driving pulley with on the driven pulley, driving pulley rotation can pass through the drive belt drives driven pulley rotates.

Through adopting above-mentioned technical scheme, through driving pulley and driven pulley's setting, make second actuating mechanism need not to set up at the main shaft top, can set up in main shaft one side to the whole length of impact rotation wear testing machine has been reduced.

Optionally, the device further comprises a friction detection device, the friction detection device comprises a moment wheel, a second detection piece and a connection rope, the moment wheel is connected with the sample holder and can rotate together with the sample holder, one end of the connection rope is connected with the second detection piece, the other end of the connection rope is connected with the sample holder, and the second detection piece is used for detecting moment received by the moment wheel.

Through adopting above-mentioned technical scheme, when the main shaft drove first sample and produced the rotation trend, produce relative friction between first sample and the second sample, first sample and second sample were static relatively under the effect of frictional force this moment to the second sample takes the moment wheel to produce the rotation trend to make moment wheel pulling connecting rope, make the moment of second detection piece detection moment wheel. Until relative rotation occurs between the first sample and the second sample, the friction coefficients of the first sample and the second sample can be calculated by the data measured by the second detection piece.

Optionally, the top surface of the sample holder is provided with a containing cavity, and the containing cavity is used for containing the first sample and the second sample.

By adopting the technical scheme, substances such as oil or sand can be added into the accommodating cavity in the test process, so that the stability of the operation of the first sample and the second sample under various environments is simulated.

Optionally, a retaining ring is disposed on the top surface of the sample holder, and the retaining ring is disposed around the sample holder.

Through adopting above-mentioned technical scheme, retaining ring cover sample holder round sets up to increased the degree of depth that holds the chamber, made to hold the intracavity and can hold more other substances, also be difficult to make the material such as oil or sand spill from holding the intracavity in the experimentation

Optionally, the main shaft is provided with a connecting device for installing the first sample, the connecting device comprises an adjusting sleeve, a mounting seat and a connecting sleeve, the connecting sleeve is sleeved on the main shaft and is in clamping connection with the main shaft, the adjusting sleeve is fixedly connected with the connecting sleeve, the adjusting sleeve is sleeved on the mounting seat, and the mounting seat can be inserted into the first sample and is in clamping connection with the first sample.

Through adopting above-mentioned technical scheme, when installing first sample, earlier with adapter sleeve joint on the main shaft, place the mount pad in the adjusting sleeve again, fix the adjusting sleeve on the adapter sleeve again, finally with mount pad and first sample joint to accomplish the installation to first sample, it can make things convenient for the installation and the dismantlement of first sample.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The loading device continuously pushes the second sample, so that the second sample is in closer contact with the first sample, and when the first sample and the second sample are worn, the loading device can push the second sample to move, so that the second sample is continuously attached to the first sample, and the experimental detection is more accurate;

2. The second sliding seat is driven to move through the arrangement of the second driving mechanism, so that the second sliding seat moves in a reciprocating mode, the elastic piece is compressed, the elastic piece is repeatedly contracted, the second sample is repeatedly impacted, and therefore the impact resistance of the second sample is detected;

When the abrasion device runs, high points and low points exist on the end surfaces of the first sample and the second sample, so that when the first sample and the second sample rotate mutually, larger noise is generated, and a buffer space is reserved by arranging the elastic piece, so that noise is reduced;

3. During the test, substances such as oil or sand may be added to the holding chamber to simulate the stability of the first and second samples operating in various environments.

Drawings

FIG. 1 is a schematic view showing the overall structure of an impact rotary wear testing machine according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an impact rotary wear testing machine with a hidden chassis according to an embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of an impact rotary wear testing machine according to an embodiment of the present application.

Fig. 4 is an enlarged partial schematic view of the portion a in fig. 3.

Fig. 5 is a partially enlarged schematic view of the portion B in fig. 3.

In the figure, 1, a case; 11. a sample holder; 111. a receiving chamber; 112. a retainer ring; 12. a platen; 13. a frame; 14. a guide sleeve; 15. a piston; 16. a column; 17. a third sliding seat;

2. a wear device; 21. a third driving mechanism; 211. a driving pulley; 212. a driven pulley; 213. a transmission belt; 22. a main shaft;

3. An impact device; 31. a second driving mechanism; 311. a driving member; 312. an eccentric shaft; 313. a connecting rod; 314. a motor small shaft; 315. a motor plate; 32. a second sliding seat; 33. an elastic member;

4. A loading device; 41. a first driving mechanism; 411. a speed reducer; 412. a screw rod; 413. a nut; 42. a first sliding seat; 43. a first detecting member;

5. A connecting device; 51. adjusting the sleeve; 511. a second flange; 512. a slit hole; 52. a mounting base; 521. a first flange; 523. a mounting block; 524. a ring groove; 525. an O-ring; 53. connecting sleeves;

6. Friction detection means; 61. a moment wheel; 62. a second detecting member; 63. a connecting rope;

7. a first sample; 71. a through hole; 8. and a second sample.

Detailed Description

The present application will be described in further detail with reference to fig. 1 to 5.

Referring to fig. 1, an impact rotary wear testing machine comprises a machine case 1 and fig. 2, wherein a wear device 2, an impact device 3 and a loading device 4 are arranged in the machine case 1, and in the embodiment, the wear device 2, the impact device 3 and the loading device 4 are sequentially arranged from top to bottom. The machine case 1 is also internally provided with a sample holder 11, a first sample 7 and a second sample 8 are placed in the sample holder 11, in this embodiment, the first sample 7 is stacked above the second sample 8, the first sample 7 is driven to rotate by the abrasion device 2, friction is performed between the first sample 7 and the second sample 8, so that the first sample 7 and the second sample 8 are abraded, and after the experiment is completed, the first sample 7 and the second sample 8 are weighed, so that the abrasion resistance degree of the first sample 7 and the abrasion resistance degree of the second sample 8 are obtained.

During the use of the abrasion device 2, the loading device 4 always keeps running, drives the second sample 8 to generate upward movement trend, and enables the first sample 7 and the second sample 8 to be in abutting connection.

The impact device 3 is arranged on the loading device 4, and when the loading device 4 drives the second sample 8 to generate an upward movement trend, the impact device 3 is driven to generate an upward movement trend, so that the distance between the impact device 3 and the second sample 8 is kept unchanged all the time. The impact device 3 can be used for independently performing impact test on the second sample 8, detecting the impact resistance of the second sample 8, and also can be used for enabling the impact device 3 and the abrasion device 2 to operate together, detecting the abrasion resistance of the first sample 7 and the second sample 8 in an impact state, and simulating the actual application scene of the first sample 7 and the second sample 8.

Referring to fig. 3 and 4, in order to perform tests on the first sample 7 and the second sample 8 in different environments, a receiving cavity 111 is formed on the top surface of the sample holder 11, and the first sample 7 and the second sample 8 are placed in the receiving cavity 111, and during the test, substances such as oil or sand can be added into the receiving cavity 111 to simulate the stability of the operation of the first sample 7 and the second sample 8 in various environments.

In this embodiment, the top surface of the sample holder 11 is fixedly connected with a retainer ring 112, and the retainer ring 112 is sleeved around the sample holder 11, so that the depth of the accommodating cavity 111 is increased, more other substances can be accommodated in the accommodating cavity 111, and the substances such as oil or sand are not easy to splash out of the accommodating cavity 111 in the experimental process.

The abrasion device 2 comprises a third driving mechanism 21 and a main shaft 22, wherein the third driving mechanism 21 drives the main shaft 22 to rotate, so that the main shaft 22 drives the first sample 7 to rotate. The third driving mechanism 21 may adopt a motor, and is directly and fixedly connected with the main shaft 22 through the motor, so as to drive the main shaft 22 to rotate. In this embodiment, the inner wall of the chassis 1 is fixedly connected with a platen 12, a frame 13 is fixedly connected to the platen 12, a third driving mechanism 21 is installed on the frame 13, and a spindle 22 is rotatably connected with the frame 13 through a bearing.

In this embodiment, in order to reduce the height of the entire impact rotary wear testing machine in the vertical direction, the third driving mechanism 21 includes a driving pulley 211, a driven pulley 212 and a driving belt 213, the driving pulley 211 is driven to rotate by a motor, the driving belt 213 is annular and is sleeved on the driving pulley 211 and the driven pulley 212 at the same time, and the driven pulley 212 is sleeved on the main shaft 22 and is fixedly connected with the main shaft 22.

The driving pulley 211 rotates, and the driven pulley 212 is driven to rotate by the driving belt 213, so that the spindle 22 rotates, in this embodiment, in order to increase the driving stability of the driving belt 213, the driving belt 213 is a toothed belt, and the driving pulley 211 and the driven pulley 212 are correspondingly provided with teeth, so that the driving belt 213 is meshed with the driving pulley 211 and the driven pulley 212, respectively.

In order to facilitate connection of the main shaft 22 and the first sample 7, a connecting device 5 is arranged between the main shaft 22 and the first sample 7, the connecting device 5 comprises an adjusting sleeve 51, a mounting seat 52 and a connecting sleeve 53, the connecting sleeve 53 is sleeved on the main shaft 22 and is clamped with the main shaft 22, one end of the connecting sleeve 53, far away from the main shaft 22, is fixedly connected with a convex block, a slot is formed in the mounting seat 52, and the convex block is inserted into the slot, so that relative rotation between the mounting seat 52 and the connecting sleeve 53 is limited.

The first flange 521 is fixedly connected to the peripheral wall of the mounting seat 52, the second flange 511 is fixedly connected to one end, close to the mounting seat 52, of the adjusting sleeve 51, the adjusting sleeve 51 is sleeved on the mounting seat 52, and the first flange 521 is erected on the second flange 511, so that downward movement of the mounting seat 52 and the adjusting sleeve 51 in the vertical direction is limited.

The side wall of the adjusting sleeve 51 is provided with a long strip hole 512, a bolt is arranged between the adjusting sleeve 51 and the connecting sleeve 53, and the bolt penetrates through the long strip hole 512 and is in threaded connection with the connecting sleeve 53, so that the adjusting sleeve 51 is fixedly connected with the connecting sleeve 53, at the moment, the main shaft 22 rotates to drive the connecting sleeve 53 to rotate, and the connecting sleeve 53 drives the adjusting sleeve 51 and the mounting seat 52 to rotate.

In this embodiment, in order to facilitate adjustment of the positions of the adjustment sleeve 51 and the mounting seat 52, the inner diameter of the elongated hole 512 is larger than the outer diameter of the threaded rod on the bolt and smaller than the outer diameter of the head on the bolt, so that the adjustment sleeve 51 can be adjusted in its axial position when the adjustment sleeve 51 is mounted.

One end of the mounting seat 52, which is far away from the adjusting sleeve 51, is fixedly connected with a mounting block 523, a through hole 71 is formed in the first sample 7, the mounting block 523 is inserted into the through hole 71, clamping connection between the mounting seat 52 and the first sample 7 is achieved, in the embodiment, a ring groove 524 is formed in a circle on the side wall of the mounting block 523, an O-shaped ring 525 is sleeved in the ring groove 524, the O-shaped right is made of rubber materials in the embodiment, and silica gel or other materials can be adopted in other embodiments. When the mounting block 523 is inserted into the through hole 71, the O-ring 525 is elastically deformed, so that the mounting block 523 abuts against the inner wall of the through hole 71, and the connection between the first sample 7 and the mounting seat 52 is realized.

When the first sample 7 is installed, the connecting sleeve 53 is clamped on the main shaft 22, the installation seat 52 is placed in the adjusting sleeve 51, the first flange 521 and the second flange 511 are abutted against each other, the installation seat 52 is limited, the adjusting sleeve 51 is fixed on the connecting sleeve 53 by using bolts, the protruding blocks are inserted into the inserting grooves, rotation of the installation seat 52 is limited, and finally the installation block 523 is inserted into the through hole 71, so that connection between the first sample 7 and the main shaft 22 is completed, and installation and disassembly of the first sample 7 are facilitated.

In this embodiment, in order to increase the play margin between the spindle 22 and the mounting seat 52, balls are disposed between the spindle 22 and the mounting seat 52, and the balls are distributed and rotationally connected with the spindle 22 and the mounting seat 52, so that the movement of the mounting seat 52 on the axis of the spindle 22 is limited, and a certain rotation margin exists between the mounting seat 52 and the spindle 22, so that the impact rotation wear testing machine operates more stably.

The loading device 4 includes a first driving mechanism 41, a first sliding seat 42, and a first detecting member 43, where in this embodiment, the first detecting member 43 is a pressure sensor, the first detecting member 43 is used for detecting a pressure applied to the second sample 8, and the first driving mechanism 41 is used for driving the first sliding seat 42 to move and making the first sliding seat 42 abut against the first detecting member 43.

In this embodiment, the bottom surface of the platen 12 is fixedly connected with the columns 16, the number of columns 16 is several, in this embodiment, two columns 16 are symmetrically disposed, and two columns 16 respectively penetrate through two ends of the first sliding seat 42, so that the first sliding seat 42 is slidably connected to the columns 16, and in order to reduce the sliding difficulty of the first sliding seat 42, a linear bearing is disposed between the first sliding seat 42 and the columns 16.

The platen 12 is fixedly connected with a guide sleeve 14, the guide sleeve 14 penetrates through the platen 12, a piston 15 is slidably arranged in the guide sleeve 14, a first detection piece 43 is fixedly connected to one end of the piston 15, which is close to a first sliding seat 42, the other end of the piston 15 is connected with the sample seat 11, when the first sliding seat 42 slides upwards, the piston 15 abuts against the first detection piece 43, and at the moment, the force received by the first detection piece 43 is transmitted by the piston 15, so that the pressure received by the first detection piece 43 is the pressure received by the second sample 8.

The first driving mechanism 41 comprises a motor, a speed reducer 411, a screw rod 412 and a nut 413, wherein the motor is connected with the speed reducer 411, so that the motor can be transversely arranged through the speed reducer 411 to reduce the length of the impact rotary wear testing machine in the vertical direction. The screw rod 412 is fixedly connected to the output end of the speed reducer 411, the screw rod 412 is driven to rotate through the motor and the speed reducer 411, the nut 413 is sleeved on the screw rod 412 and is in threaded connection with the screw rod 412, the upright post 16 is slidably connected with the third sliding seat 17, and the third sliding seat 17 is sleeved on the nut 413 and is fixedly connected with the nut 413.

The screw rod 412 rotates to drive the nut 413 to rotate, and the nut 413 is limited to rotate by the third sliding seat 17, so that the nut 413 moves along the axial direction of the screw rod 412, thereby pushing the third sliding seat 17 to move. The impact device 3 is installed between the third sliding seat 17 and the first sliding seat 42, the third sliding seat 17 slides to push the impact device 3 to move, so that the impact device 3 pushes the first sliding seat 42 to slide, the first sliding seat 42 is abutted against the first detection piece 43, and the pressure applied to the second sample 8 at the moment is detected.

Referring to fig. 3 and 5, the impact device 3 includes a second driving mechanism 31 and a second sliding seat 32, where the second driving mechanism 31 drives the second sliding seat 32 to reciprocate in the axial direction of the screw 412, and in this embodiment, the second sliding seat 32 is sleeved on the upright 16 and is slidably connected with the upright 16.

An elastic member 33 is disposed between the second sliding seat 32 and the first sliding seat 42, one end of the elastic member 33 acts on the first sliding seat 42, and the other end of the elastic member 33 acts on the second sliding seat 32, in this embodiment, the elastic member 33 adopts a spring, one end of the spring is fixedly connected with the first sliding seat 42, and the other end of the spring is fixedly connected with the second sliding seat 32.

In the process of moving up the second sliding seat 32, the elastic member 33 is pushed to move, so that the elastic member 33 pushes the first sliding seat 42 to move, and continuously pushes the second sliding seat 32 to move, so that the elastic member 33 is compressed, and at this time, the elastic member 33 detects the pressure applied to the second sample 8.

The second driving mechanism 31 includes a driving member 311, an eccentric shaft 312 and a connecting rod 313, the driving member 311 is mounted on the third sliding seat 17, in this embodiment, the driving member 311 adopts a motor, a small motor shaft 314 is fixedly sleeved on an output shaft of the driving member 311, a motor plate 315 is rotatably sleeved on the small motor shaft 314 through a bearing, the motor plate 315 is fixedly connected with the third sliding seat 17 and fixedly connected with the driving member 311, the eccentric shaft 312 is fixedly connected on the small motor shaft 314, a central axis of the eccentric shaft 312 is staggered with a central axis of the driving member 311, one end of the connecting rod 313 is hinged with the eccentric shaft 312, and the other end of the connecting rod 313 is hinged with the first sliding seat 42.

The driving piece 311 operates to drive the motor small shaft 314 to rotate, so as to drive the eccentric shaft 312 to rotate, and realize the reciprocating motion of the connecting rod 313, so as to drive the first sliding seat 42 to reciprocate, and the elastic piece 33 is repeatedly compressed, so that the first detecting piece 43 repeatedly receives impacts of different forces, and an impact test is performed.

Referring to fig. 3, an impact rotary wear testing machine further includes a friction detection device 6, where the friction detection device 6 includes a moment wheel 61, a second detection member 62, and a connection rope 63, the moment wheel 61 is disposed between the sample holder 11 and the piston 15, and the moment wheel 61 is fixedly connected with the sample holder 11 and rotatably connected with the piston 15. The second detecting element 62 is mounted on the frame 13, one end of the connecting rope 63 is fixedly connected with the moment wheel 61, and the other end of the connecting rope 63 is fixedly connected with the second connecting element.

When the spindle 22 drives the first sample 7 to generate a rotation trend, relative friction is generated between the first sample 7 and the second sample 8, at this time, the first sample 7 and the second sample 8 are relatively static under the action of friction force, and the second sample 8 is provided with the moment wheel 61 to generate a rotation trend, so that the moment wheel 61 pulls the connecting rope 63, and the second detecting member 62 detects the moment of the moment wheel 61. Until relative rotation occurs between the first sample 7 and the second sample 8, the friction coefficients of the first sample 7 and the second sample 8 can be calculated from the data measured by the second detecting element 62.

The implementation principle of the embodiment of the application is as follows: when the first sample 7 and the second sample 8 are detected, the loading device 4 is started, the third sliding seat 17 pushes the motor plate 315 to move upwards, and then the second sliding seat 32 is pushed to move upwards, the first sliding seat 42 is abutted against the first detecting piece 43, and at the moment, the elastic piece 33 is compressed, namely, a pre-pressing force is applied to the second sample 8, so that the second sample 8 is attached to the first sample 7 more tightly.

The driving piece 311 is started again to operate, the second sliding seat 32 is driven to move up and down, repeated compression of the spring is achieved, further repeated impact is carried out on the second sample 8, the driving belt pulley 211 is started, the main shaft 22 drives the first sample 7 to rotate, and friction experiments are carried out between the first sample 7 and the second sample 8.

When the first sample 7 and the second sample 8 rub against each other, consumption occurs, so that the first sample 7 and the second sample 8 are not tightly attached to each other, and the loading device 4 continuously supplies force, so that the first sample 7 and the second sample 8 are tightly attached to each other.

The impact rotary wear testing machine can also independently detect friction and impact and the compression resistance of the first sample 7 and the second sample 8.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (9)

1. An impact rotary wear testing machine, comprising a loading device (4), an impact device (3), a wear device (2) and a sample holder (11) for fixing a second sample (8), wherein the impact device (3) is used for providing repeated impact to the second sample (8), the wear device (2) is used for driving a first sample (7) to rotate so as to generate friction with the second sample (8), and the loading device (4) is used for providing pressure to the second sample (8);

The loading device (4) comprises a first driving mechanism (41), a first sliding seat (42) and a first detection piece (43), wherein the first driving mechanism (41) can drive the first sliding seat (42) to move and enable the first sliding seat (42) to be abutted with the first detection piece (43), and the first detection piece (43) is used for detecting the pressure born by the second sample (8);

The impact force of the impact device (3) acts on the first sliding seat (42) and the impact device (3) can move synchronously with the first sliding seat (42).

2. An impact rotary wear testing machine according to claim 1, characterized in that the impact device (3) comprises a second driving mechanism (31) and a second sliding seat (32), the second driving mechanism (31) can drive the second sliding seat (32) to reciprocate in the moving direction of the first sliding seat (42), an elastic member (33) is arranged between the second sliding seat (32) and the first sliding seat (42), one end of the elastic member (33) acts on the second sliding seat (32), and the other end of the elastic member (33) acts on the first sliding seat (42).

3. An impact rotary wear testing machine according to claim 2, wherein the second driving mechanism (31) comprises a driving member (311), an eccentric shaft (312) and a connecting rod (313), the eccentric shaft (312) is fixedly connected to an output shaft of the driving member (311), a central axis of the eccentric shaft (312) is staggered with a central axis of the output shaft of the driving member (311), one end of the connecting rod (313) is hinged with the eccentric shaft (312), and the other end of the connecting rod (313) is hinged with the second sliding seat (32).

4. An impact rotary wear testing machine according to claim 1, characterized in that the wear device (2) comprises a third driving mechanism (21) and a main shaft (22), the third driving mechanism (21) drives the main shaft (22) to rotate, and the main shaft (22) can be connected with the first sample (7) and can drive the first sample (7) to rotate.

5. The impact rotary wear testing machine according to claim 4, wherein the third driving mechanism (21) comprises a driving pulley (211), a driven pulley (212) and a driving belt (213), the driven pulley (212) is fixedly connected with the main shaft (22), the driving belt (213) is sleeved on the driving pulley (211) and the driven pulley (212), and the driving pulley (211) can rotate to drive the driven pulley (212) to rotate through the driving belt (213).

6. The impact rotary wear testing machine according to claim 5, further comprising a friction detection device (6), wherein the friction detection device (6) comprises a moment wheel (61), a second detection member (62) and a connecting rope (63), the moment wheel (61) is connected with the sample holder (11) and can rotate together with the sample holder (11), one end of the connecting rope (63) is connected with the second detection member (62), the other end of the connecting rope (63) is connected with the sample holder (11), and the second detection member (62) is used for detecting moment received by the moment wheel (61).

7. An impact rotary wear testing machine according to claim 1, characterized in that the top surface of the sample holder (11) is provided with a receiving chamber (111), the receiving chamber (111) being adapted to receive a first sample (7) and a second sample (8).

8. An impact rotary wear testing machine according to claim 7, characterized in that the top surface of the sample holder (11) is provided with a collar (112), said collar (112) being arranged around the sample holder (11).

9. The impact rotary wear testing machine according to claim 4, wherein the main shaft (22) is provided with a connecting device (5) for installing the first sample (7), the connecting device (5) comprises an adjusting sleeve (51), a mounting seat (52) and a connecting sleeve (53), the connecting sleeve (53) is sleeved on the main shaft (22) and is clamped with the main shaft (22), the adjusting sleeve (51) is fixedly connected with the connecting sleeve (53), the adjusting sleeve (51) is sleeved on the mounting seat (52), and the mounting seat (52) can be inserted into the first sample (7) and is clamped with the first sample (7).