Friction-wear tester

Abstract

The invention discloses a frictional wear tester, comprising a frame body which comprises a base and a supporting seat; the driving motor is fixedly arranged on the base; the moving device is mounted on the base; the test piece fixing device comprises a rotary table and a lower friction module; the direct drive device comprises a direct drive motor, a first guide rail, a first sliding block, a first sliding table and a position encoder, and the direct drive motor is used for driving the first sliding block to linearly reciprocate on the first guide rail; the upper friction module comprises a clamp and a friction head, the clamp is fixedly arranged at the bottom of the first sliding table through a force sensor, the friction head is clamped by the clamp, and the friction head corresponds to the lower friction module in position. And meanwhile, a force sensor and a position encoder are adopted to collect data for analysis and output, so that the alternating load can be simulated, and meanwhile, a friction wear test function is combined.

Description

Technical Field

[0001] The invention relates to the field of material testing equipment, in particular to a friction and wear tester. Background Art

[0002] Most existing friction and wear test equipment can only perform tests under constant load conditions and cannot effectively simulate the complex and variable load conditions in actual applications. Especially in high-end manufacturing fields such as aerospace, military industry, and wind power, materials will experience high frequency, high pressure, and complex load changes during service, which puts higher requirements on the wear resistance of materials.

[0003] The test equipment currently available on the market, such as conventional pin-on-disk wear testers and ring-block friction and wear testers, are difficult to meet these high-demand test needs. At the same time, although the existing dynamic fatigue testers can simulate alternating loads, they cannot combine friction and wear test functions. The needs in this field have long relied on imported equipment, and there is still a gap between the test results and actual working conditions.

[0004] Based on the above reasons, it is necessary to improve the existing technology. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The present invention is aimed at the above defects existing in the prior art, and specifically proposes a friction and wear tester to solve the problems raised in the above background technology.

[0007] 2. Technical Solution

[0008] In order to solve the above technical problems, the present invention provides a friction and wear tester, comprising a frame, wherein the frame comprises a base and a support seat fixedly arranged on the base;

[0009] A driving motor, wherein the driving motor is fixedly arranged on the base;

[0010] A moving device, which is mounted on the base and is controlled by the driving motor to perform linear reciprocating motion;

[0011] A specimen fixing device, the specimen fixing device comprising a turntable arranged on the moving device and a lower friction module arranged on the turntable;

[0012] A direct drive device, the direct drive device comprising a direct drive motor fixedly arranged on the support seat, a first guide rail fixedly arranged on the direct drive motor, a first slider used in conjunction with the first guide rail, a first slide table fixedly connected to one end of the first slider, and a position encoder arranged on one side of the direct drive motor, wherein the direct drive motor is used to drive the first slider to perform linear reciprocating motion on the first guide rail;

[0013] The upper friction module comprises a clamp fixedly arranged at the bottom of the first slide table through a force sensor and a friction head clamped by the clamp, and the friction head corresponds to the position of the lower friction module.

[0014] In the above technical solution, a first rotating shaft is provided at the bottom of the driving device, a first transmission wheel is provided outside the first rotating shaft, a second rotating shaft is provided at the bottom of the turntable, a second transmission wheel is provided outside the second rotating shaft, and the first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0015] In the above technical solution, the moving device includes a second guide rail fixedly arranged on both sides of the base, a second slider used in conjunction with the second guide rail, and a second slide fixed to the top of the second slider, and a screw rod used in conjunction with the drive motor is arranged inside the second slide.

[0016] In the above technical solution, two first limit blocks are fixedly arranged on the base, and the first limit blocks are arranged at both ends of the second guide rail.

[0017] In the above technical solution, locking devices for fixing and locking the second slide are provided at both ends of the second slide.

[0018] In the above technical solution, a second limit block for limiting the movement of the first slide is arranged on the top of the direct drive motor.

[0019] In the above technical solution, a convex portion is provided on one side of the first slide, and a hydraulic damper used in conjunction with the convex portion is provided on the support seat.

[0020] In the above technical solution, a position encoder is fixedly provided on one side of the direct drive motor.

[0021] In the above technical solution, the lower friction module is a disc module or a reciprocating module.

[0022] 3. Beneficial Effects

[0023] Compared with the prior art, the present invention has the following beneficial effects: the present invention uses a direct-drive motor to achieve high-frequency dynamic loading, so that the present invention can effectively simulate the complex and changeable conditions in actual applications, and at the same time uses a force sensor and a position encoder to collect data for analysis and output, so that the present invention can simulate alternating loads and combine friction and wear testing functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a left schematic view of the three-dimensional structure of the present invention.

[0025] Figure 2It is a right side schematic view of the three-dimensional structure of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the direct drive device of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of some devices of the present invention.

[0028] Figure 5 It is a schematic diagram of the exploded structure of some devices of the present invention.

[0029] Figure 6 It is a schematic diagram of the reciprocating module structure of the present invention.

[0030] In the figure: 1 is a frame, 10 is a base, 11 is a support seat, 100 is a first limit block, 2 is a driving motor, 20 is a first rotating shaft, 21 is a first transmission wheel, 22 is a transmission belt, 3 is a moving device, 30 is a second guide rail, 31 is a second slider, 32 is a second slide, 33 is a screw rod, 34 is a locking device, 4 is a specimen fixing device, 40 is a turntable, 41 is a lower friction module, 400 is a second rotating shaft, 401 is a second transmission wheel, 5 is a direct drive device, 50 is a direct drive motor, 51 is a first guide rail, 52 is a first slider, 53 is a first slide, 54 is a second limit block, 55 is a convex portion, 56 is a hydraulic damper, 57 is a position encoder, 6 is an upper friction module, 60 is a force sensor, 61 is a clamp, and 62 is a friction head. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] See also Figure 1-6 The present invention provides a friction and wear tester, comprising a frame 1, wherein the frame 1 comprises a base 10 and a support base (11) fixedly arranged on the base 10;

[0033] A driving motor 2, wherein the driving motor 2 is fixedly disposed on the base 10;

[0034] A moving device 3, wherein the moving device 3 is mounted on the base 10 and is controlled by the driving motor 2 to perform linear reciprocating motion;

[0035] A specimen fixing device 4, the specimen fixing device 4 comprises a turntable 40 arranged on the moving device 3 and a lower friction module 41 arranged on the turntable 40;

[0036] A direct drive device 5, the direct drive device 5 comprising a direct drive motor 50 fixedly arranged on the support seat 11, a first guide rail 51 fixedly arranged on the direct drive motor 50, a first slider 52 used in conjunction with the first guide rail 51, a first slide table 53 fixedly connected to one end of the first slider 52, and a position encoder 57 arranged on one side of the direct drive motor 50, the direct drive motor 50 is used to drive the first slider 52 to perform linear reciprocating motion on the first guide rail 51;

[0037] The upper friction module 6 includes a clamp 61 fixedly arranged at the bottom of the first slide 53 through a force sensor 60 and a friction head 62 clamped by the clamp 61 , and the friction head 62 corresponds to the position of the lower friction module 41 .

[0038] In the above structure, when the operator needs to use the friction and wear tester, after clamping the test piece at the position of the lower friction module, the driving motor is started to drive the moving device to move, and when the moving device moves the test piece to the position corresponding to the upper friction module, the friction head is clamped on the fixture, and the control device is used to accurately control the bottom turntable to rotate at a random speed within the set speed range. At the same time, the direct drive motor is accurately controlled to drive the first slide to move up and down according to a prescribed rule, so that the friction head presses against the test piece according to a certain rule to generate a periodic downward pressure, and the speed of the turntable is controlled to fluctuate within a certain range around the set value, and the downward pressure is always periodic, thus forming a The pressure applied by the friction head is not limited to a few fixed positions, but is evenly distributed around the specimen. This can simulate the actual situation where friction and wear usually occur on the entire contact surface rather than at fixed points, and can comprehensively and accurately evaluate the friction and wear performance of the test object, avoiding the situation where errors in the test results occur due to improper selection of fixed points. High-frequency dynamic loading can be achieved at the same time, so that the present invention can effectively simulate the complex and changeable conditions in actual applications. At the same time, force sensors and position encoders are used to collect data for analysis and output, so that the present invention can simulate alternating loads and combine friction and wear test functions.

[0039] Specifically, a first rotating shaft 20 is provided at the bottom of the driving device 2, and a first transmission wheel 21 is provided on the outer cover of the first rotating shaft 20. A second rotating shaft 400 is provided at the bottom of the turntable 40, and a second transmission wheel 401 is provided on the outer cover of the second rotating shaft 400. The first transmission 21 and the second transmission wheel 401 are connected by a transmission belt 22. Using the transmission wheel and the transmission belt as the transmission device has the advantages of stable operation and low cost.

[0040] Specifically, the moving device 3 includes a second guide rail 30 fixedly arranged on both sides of the base 1, a second slider 31 used in conjunction with the second guide rail 30, and a second slide 32 fixed to the top of the second slider 31. The second slide 32 is internally provided with a screw rod 33 used in conjunction with the drive motor 2. The use of the guide rail and the slider can reduce the driving rate and achieve the effect of only requiring less power to drive. The use of the screw rod and the drive motor to move the second slide can increase stability and improve the accuracy of the movement of the second slide.

[0041] Specifically, two first limit blocks 100 are fixedly provided on the base 10. The first limit blocks 100 are provided at both ends of the second guide rail 30. The first limit blocks are used to limit the moving position of the second slider to prevent the second slider from excessive displacement and deviating from the second guide rail.

[0042] Specifically, locking devices 34 for fixing and locking the second slide 32 are provided at both ends of the second slide 32. The locking devices can be used to lock the second slide at any time to prevent the second slide from shifting during the friction and wear tester experiment, thereby causing data errors.

[0043] Specifically, a second limit block 54 for limiting the movement of the first slide 53 is disposed on the top of the direct drive motor 50. The second limit block can limit the upward movement of the first slide to prevent the first slide from excessively moving upward and thus leaving the first guide rail.

[0044] Specifically, a protrusion 55 is provided on one side of the first slide 53, and an oil pressure damper 56 used in conjunction with the protrusion 55 is provided on the support seat 11. When the operator is using the friction and wear tester for experiment, a sudden power outage will cause the direct drive motor to stop running instantly, thereby causing the first slide driven by the direct drive motor to fall instantly. The cooperation between the protrusion provided on the side of the first slide and the oil pressure damper can buffer the falling force and effectively protect the friction and wear tester.

[0045] Specifically, the lower friction module 41 is a disc module or a reciprocating module. The disc module can be used for multi-angle steering motion, and the reciprocating module is used for linear reciprocating motion.

[0046] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A friction and wear tester, characterized in that: include: A frame (1), the frame (1) comprising a base (10) and a support base (11) fixedly arranged on the base (10); a driving motor (2), the driving motor (2) being fixedly arranged on the base (10); a moving device (3), the moving device (3) being installed on the base (10) and being controlled by the driving motor (2) to perform linear reciprocating motion; A specimen fixing device (4), the specimen fixing device (4) comprising a turntable (40) arranged on the moving device (3) and a lower friction module (41) arranged on the turntable (40); a direct drive device (5), the direct drive device (5) comprising a direct drive motor (50) fixedly arranged on the support seat (11), a first guide rail (51) fixedly arranged on the direct drive motor (50), a first slider (52) used in conjunction with the first guide rail (51), a first slide table (53) fixedly connected to one end of the first slider (52), and a position encoder (57) arranged on one side of the direct drive motor (50), the direct drive motor (50) being used to drive the first slider (52) to perform linear reciprocating motion on the first guide rail (51); An upper friction module (6), the upper friction module (6) comprising a clamp (61) fixedly arranged at the bottom of the first slide (53) through a force sensor (60) and a friction head (62) clamped by the clamp (61), the friction head (62) corresponding to the position of the lower friction module (41).

2. A friction and wear tester according to claim 1, characterized in that: A first rotating shaft (20) is arranged at the bottom of the driving device (2), and a first transmission wheel (21) is arranged on the outer shell of the first rotating shaft (20); a second rotating shaft (400) is arranged at the bottom of the turntable (40), and a second transmission wheel (401) is arranged on the outer shell of the second rotating shaft (400); the first transmission wheel (21) and the second transmission wheel (401) are connected via a transmission belt (22).

3. A friction and wear tester according to claim 1, characterized in that: The moving device (3) comprises a second guide rail (30) fixedly arranged on both sides of the base (1), a second slider (31) used in conjunction with the second guide rail (30), and a second slide table (32) fixed to the top of the second slider (31), wherein a screw rod (33) used in conjunction with the drive motor (2) is arranged inside the second slide table (32).

4. A friction and wear tester as claimed in claim 3, characterized in that: Two first limit blocks (100) are fixedly arranged on the base (10), and the first limit blocks (100) are arranged at two ends of the second guide rail (30).

5. A friction and wear tester as claimed in claim 3, characterized in that: Locking devices (34) for fixing and locking the second slide platform (32) are provided at both ends of the second slide platform (32).

6. A friction and wear tester as claimed in claim 1, characterized in that: A second limiting block (54) for limiting the movement of the first slide table (53) is arranged on the top of the direct drive motor (50).

7. A friction and wear tester as claimed in claim 1, characterized in that: A convex portion (55) is provided on one side of the first slide (53), and an oil pressure damper (56) used in conjunction with the convex portion (55) is provided on the support seat (11).

8. A friction and wear tester as claimed in claim 1, characterized in that: The lower friction module (41) is a disc module or a reciprocating module.

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