Punching composite fretting wear test clamp
By designing a punching-cutting composite fretting wear test fixture with tangential and radial moving components, the problem of simulating the punching-cutting composite fretting wear of rod-shaped specimens in the existing technology is solved, and the true test of the wear performance of material surfaces is realized.
Patent Information
- Application Number
- CN202423303723.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing technologies cannot realistically simulate the damage of rod-shaped specimens under punching and shearing combined fretting wear, especially the test of combined fretting damage between materials.
A punching-cutting composite fretting wear test fixture was designed, including a tangential movement component and a radial movement component, which are used to clamp the rod-shaped sample. The tangential and radial movements simulate wear under actual working conditions.
Tangential and radial impact fretting wear tests were performed on rod-shaped specimens, which accurately reflected the wear of the specimens under actual working conditions and tested the surface punching and shearing composite fretting wear performance of different materials.
Smart Images
Figure CN223784041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of micro-motion testing technology, and in particular to a punching-cutting composite micro-motion wear testing fixture. Background Technology
[0002] Fretting damage is widespread in numerous fields such as aerospace, railways, and nuclear power. For example, when a high-speed train passes over a track at high speed, the vibration frequency generated by the track can reach 50–200 Hz. High-frequency, low-amplitude fretting can cause wear on material surfaces, create gaps between materials leading to leaks, and other accidents. Simultaneously, fretting can also cause localized stress concentration in materials, generating micro-cracks that are difficult for equipment to detect, and ultimately even leading to brittle fracture without warning. Tangential fretting and impact fretting are two main types of fretting, but in practice, combined punching and shearing fretting is the most realistic motion mode. Compared to single tangential or impact fretting, combined punching and shearing fretting causes more complex damage to materials.
[0003] In order to more realistically simulate the damage of rod-shaped specimens after punching and fretting wear, it is necessary to develop a test fixture and method suitable for testing the combined fretting wear on the surface of rod-shaped specimens, specifically for punching and fretting damage between the same / different materials. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a punching composite fretting wear test fixture suitable for rod-shaped specimens.
[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide a punching and cutting composite fretting wear test fixture, including a tangential moving component, a tangential clamp for clamping a rod-shaped sample, a radial moving component, and a radial clamp for clamping a rod-shaped sample;
[0006] The tangential clamp and the radial clamp are directly opposite each other; the tangential clamp is fixed to the tangential moving assembly, and the tangential moving assembly drives the tangential clamp to move back and forth in the tangential direction;
[0007] The radial clamp is fixed to the radial moving assembly, and the radial moving assembly drives the radial clamp to move back and forth in the radial direction.
[0008] In some embodiments, the upper end of the tangential clamp is provided with a first clamping portion protruding toward the radial clamping direction, and the bottom of the tangential clamp is provided with a second clamping portion protruding toward the radial clamping direction;
[0009] The gap between the first clamp and the second clamp forms a first placement position for accommodating the rod-shaped sample.
[0010] In some embodiments, the top of the radial clamp is provided with a third clamping portion protruding toward the tangential clamping direction, and the lower end of the radial clamp is provided with a fourth clamping portion protruding toward the tangential clamping direction;
[0011] The gap between the third clamp and the fourth clamp forms a second placement position for accommodating the rod-shaped sample; and the third clamp is offset from the first clamp, and the fourth clamp is offset from the second clamp.
[0012] In some embodiments, the tangential moving assembly includes a first fixed base and a tangential shaft;
[0013] The tangential clamp is fixedly connected to one side of the first fixed seat; the tangential shaft is located on the side of the tangential clamp opposite to the radial clamp, and passes through the first fixed seat, and can move back and forth in the tangential direction to drive the first fixed seat to move.
[0014] In some embodiments, a first groove is provided on one side of the first fixing seat, and the tangential clamp is fitted into the first groove and fixedly connected to the first fixing seat.
[0015] In some embodiments, the radial movement assembly includes a second fixed base and a radial shaft;
[0016] The radial clamp is fixedly connected to one side of the second fixed seat, and the radial shaft passes through the second fixed seat, allowing it to move back and forth in the radial direction to move the second fixed seat.
[0017] The radial axis extends in a direction perpendicular to and offset from the tangential axis.
[0018] In some embodiments, the radial movement assembly further includes a connecting seat; the connecting seat is fixedly connected to the second fixed seat, and one end of the connecting seat protrudes toward one side of the second fixed seat and is fixedly connected to the radial clamp.
[0019] In some embodiments, the second fixing seat has a second groove on one side edge facing the first fixing seat, the radial clamp portion in width fits into the second groove, and one end of the connecting seat fixedly connected to the radial clamp covers the second groove.
[0020] In some embodiments, the first fixing seat is formed by two first sub-seats stacked and connected, and is detachably fixed to the tangential shaft;
[0021] The second fixing seat is formed by stacking and connecting two second sub-seats, and can be detachably fixed to the radial shaft.
[0022] In some embodiments, the tangential moving component and the radial moving component are staggered along the length of the rod-shaped specimen.
[0023] The beneficial effects of this utility model are as follows: by cooperating with the tangential moving component, the tangential clamp, the radial moving component and the radial clamp, the rod-shaped sample is clamped and driven to move in the tangential and radial directions, so as to realize the tangential fretting and radial impact fretting wear test on the surface of the rod-shaped sample, so as to truly reflect the wear condition of the sample under actual working conditions and test the surface punching and shearing composite fretting wear performance of different materials.
[0024] This utility model has a simple structure and is easy to manufacture. Attached Figure Description
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0026] Figure 1 This is a schematic diagram of the punching and cutting composite fretting wear test fixture according to an embodiment of the present invention in one direction;
[0027] Figure 2 This is a schematic diagram of the punching and cutting composite fretting wear test fixture of one embodiment of the present invention in another direction;
[0028] Figure 3 This is a side view of a punching composite fretting wear test fixture according to an embodiment of the present invention. Detailed Implementation
[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0030] like Figures 1 to 3 As shown, a punching and cutting composite fretting wear test fixture of this utility model may include a tangential moving component 10, a tangential clamp 20, a radial moving component 30, and a radial clamp 40.
[0031] The tangential clamp 20 and the radial clamp 40 are used to clamp the rod-shaped sample 100. The tangential clamp 20 is fixed to the tangential moving assembly 10, and the tangential moving assembly 10 drives the tangential clamp 20 to move back and forth in the tangential direction of the rod-shaped sample 100; the radial clamp 40 is fixed to the radial moving assembly 30, and the radial moving assembly 30 drives the radial clamp 40 to move back and forth in the radial direction of the rod-shaped sample 100.
[0032] In the punching and shearing composite fretting wear test fixture, the tangential fixture 20 and the radial fixture 40 are directly opposite each other. The rod-shaped sample 100 on the tangential fixture 20 and the rod-shaped sample 100 on the radial fixture 40 can contact each other, and the contact between the two rod-shaped samples 100 is a straight line.
[0033] Specifically, the tangential movement assembly 10 may include a first fixed base 11 and a tangential shaft 12. A tangential clamp 20 is fixedly connected to one side of the first fixed base 11; the tangential shaft 12 is located on the side of the tangential clamp 20 facing away from the radial clamp 40, passes through and connects to the first fixed base 11, and is fixed relative to the first fixed base 11. The tangential shaft 12 can move back and forth in the tangential direction of the rod-shaped sample 100 under external force, thereby driving the first fixed base 11 and the tangential clamp 20 to move back and forth in the tangential direction, thus enabling a tangential fretting wear test on the rod-shaped sample 100.
[0034] In one alternative embodiment, the first fixing seat 11 can be formed by stacking two first sub-seats and connecting them with fasteners or the like. The first fixing seat 11 is formed by stacking two first sub-seats on both sides of the tangential shaft 12, thereby achieving detachable fixing to the tangential shaft 12. Correspondingly, the opposing surfaces of the two first sub-seats are provided with arc-shaped grooves for fitting with the outer surface of the tangential shaft 12.
[0035] A first groove (not shown) is provided on one side of the first fixing seat 11, and the tangential clamp 20 is fitted into the first groove and fixedly connected to the first fixing seat 11. Figure 1 In the embodiment shown, the tangential clamp 20 is engaged and fixed in the first groove in a state perpendicular to the first fixed base 11.
[0036] To hold the rod-shaped sample 100, in one embodiment, the upper end of the tangential clamp 20 is provided with a first clamping portion 21 protruding in the radial direction of the clamp 40, and the bottom of the tangential clamp 20 is provided with a second clamping portion 22 protruding in the radial direction of the clamp 40; the gap between the first clamping portion 21 and the second clamping portion 22 forms a first placement position 200 for accommodating the rod-shaped sample 100. On the tangential clamp 20, the rod-shaped sample 100 is vertically accommodated in the first placement position 200, with the top of the rod-shaped sample 100 inserted and fixed within the first clamping portion 21, and the bottom of the rod-shaped sample 100 inserted and fixed within the second clamping portion 22. Alternatively, the first clamping portion 21 and the second clamping portion 22 may be provided with through holes for the rod-shaped sample 100 to be fitted and fixed.
[0037] Understandably, the tangential clamp 20 can be formed by two tangential clamping blocks in relative engagement, which facilitates the assembly and disassembly of the rod-shaped sample 100 on the tangential clamp 20.
[0038] The radial movement assembly 30 may further include a second fixed base 31 and a radial shaft 32. A radial clamp 40 is fixedly connected to one side of the second fixed base 31, specifically the side of the second fixed base 31 facing the first fixed base 11. The radial shaft 32 passes through the second fixed base 31 and can move back and forth radially in the rod-shaped specimen 100, thereby moving the second fixed base 31 and the radial clamp 40 radially back and forth, thus enabling a radial impact wear test on the rod-shaped specimen 100.
[0039] Along the length of the rod-shaped specimen 100, the tangential moving assembly 10 and the radial moving assembly 30 are staggered. The tangential clamp 20 and the radial clamp 40 are positioned opposite each other. To prevent the movement of the radial moving assembly 30 from interfering with the tangential moving assembly 10, the second fixed seat 31 is positioned opposite the first fixed seat 11 but not completely directly opposite. The extending direction of the through-connected radial shaft 32 is perpendicular to and staggered from the extending direction of the tangential shaft 12. This ensures that the radial clamp 40 is always directly opposite the tangential clamp 20 during the test, and that the movement of the radial shaft 32 does not interfere with the tangential shaft 12.
[0040] Similarly, the second fixing seat 31 can be formed by stacking two second sub-seats and connecting them with fasteners or the like. The second fixing seat 31 is formed by stacking two second sub-seats on both sides of the radial shaft 32, so as to achieve detachable fixing to the radial shaft 32. Correspondingly, the opposing surfaces of the two second sub-seats are provided with arc-shaped grooves for matching with the outer surface of the radial shaft 32.
[0041] Furthermore, since the second fixing seat 31 is opposite to but not completely aligned with the first fixing seat 11, a portion of the second fixing seat 31 is offset from the first fixing seat 11. To securely connect the radial clamp 40, the second fixing seat 31 has a second groove (not shown) on one edge facing the first fixing seat 11. A portion of the radial clamp 40 in width fits into the second groove and can be fixedly connected by fasteners.
[0042] Preferably, the radial movement assembly 30 further includes a connecting seat 33. The connecting seat 33 is fixedly connected to the second fixed seat 31 by fasteners or the like, and one end of the connecting seat 33 protrudes towards one side of the second fixed seat 31 (the side opposite to the first fixed seat 11). The connecting seat 33 is fixedly connected to the radial clamp 40 with this protruding end, thereby fixing the radial clamp 40 to the second fixed seat 31. The end of the connecting seat 33 that is fixedly connected to the radial clamp 40 covers the second groove.
[0043] To hold the rod-shaped sample 100, the top of the radial clamp 40 may be provided with a third clamping portion 41 protruding toward the tangential clamp 20, and the lower end of the radial clamp 40 may be provided with a fourth clamping portion 42 protruding toward the tangential clamp 20. The gap between the third clamping portion 41 and the fourth clamping portion 42 forms a second placement position 400 for accommodating the rod-shaped sample 100.
[0044] On the radial clamp 40, the rod-shaped sample 100 is vertically housed in the second placement position 400. The top of the rod-shaped sample 100 is inserted and fixed in the third clamp 41, and the bottom of the rod-shaped sample 100 is inserted and fixed in the fourth clamp 42. Alternatively, the third clamp 41 and the fourth clamp 42 may be provided with through holes for the rod-shaped sample 100 to be fitted and fixed.
[0045] The tangential clamp 20 and the radial clamp 40 are arranged opposite each other. In order to ensure that the rod-shaped sample 100 on the two clamps are in straight contact, the third clamp 41 is offset from the first clamp 21, the fourth clamp 42 is offset from the second clamp 22, and the first placement position 200 and the second placement position 400 are opposite each other and connected.
[0046] When used, the punching-cutting composite fretting wear test fixture of this utility model can be used in conjunction with the existing fretting test machine to test the surface punching-cutting composite fretting wear performance of different materials.
[0047] In use, a rod-shaped specimen 100, conforming to the size of the fixture, is fabricated according to the material to be tested for fretting. The rod-shaped specimen 100 is then fixed onto the radial fixture 40 and the tangential fixture 20. After the fretting tester is started, the tangential moving component 10 and the tangential fixture 20 are driven to move back and forth in the tangential direction to test the tangential fretting wear performance of the surface of the rod-shaped specimen 100. The radial impact fretting wear performance of the surface of the rod-shaped specimen 100 is tested by driving the radial moving component 30 and the radial fixture 40 to move back and forth in the radial direction.
[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A punching-composite fretting wear test fixture, characterized in that, It includes a tangential moving assembly, a tangential clamp for holding a rod-shaped specimen, a radial moving assembly, and a radial clamp for holding a rod-shaped specimen. The tangential clamp and the radial clamp are directly opposite each other; the tangential clamp is fixed to the tangential moving assembly, and the tangential moving assembly drives the tangential clamp to move back and forth in the tangential direction; The radial clamp is fixed to the radial moving assembly, and the radial moving assembly drives the radial clamp to move back and forth in the radial direction.
2. The punching composite fretting wear test fixture according to claim 1, characterized in that, The upper end of the tangential clamp is provided with a first clamping part protruding in the direction of the radial clamp, and the bottom of the tangential clamp is provided with a second clamping part protruding in the direction of the radial clamp. The gap between the first clamp and the second clamp forms a first placement position for accommodating the rod-shaped sample.
3. The punching composite fretting wear test fixture according to claim 2, characterized in that, The top of the radial clamp is provided with a third clamping part protruding toward the tangential clamping direction, and the lower end of the radial clamp is provided with a fourth clamping part protruding toward the tangential clamping direction; The gap between the third clamp and the fourth clamp forms a second placement position for accommodating the rod-shaped sample; and the third clamp is offset from the first clamp, and the fourth clamp is offset from the second clamp.
4. The punching-cutting composite fretting wear test fixture according to claim 1, characterized in that, The tangential moving assembly includes a first fixed base and a tangential shaft; The tangential clamp is fixedly connected to one side of the first fixed seat; the tangential shaft is located on the side of the tangential clamp opposite to the radial clamp, and passes through the first fixed seat, and can move back and forth in the tangential direction to drive the first fixed seat to move.
5. The punching composite fretting wear test fixture according to claim 4, characterized in that, The first fixing seat has a first groove on one side, and the tangential clamp fits into the first groove and is fixedly connected to the first fixing seat.
6. The punching-cutting composite fretting wear test fixture according to claim 4, characterized in that, The radial movement assembly includes a second fixed base and a radial shaft; The radial clamp is fixedly connected to one side of the second fixed seat, and the radial shaft passes through the second fixed seat, allowing it to move back and forth in the radial direction to move the second fixed seat. The radial axis extends in a direction perpendicular to and offset from the tangential axis.
7. The punching composite fretting wear test fixture according to claim 6, characterized in that, The radial movement assembly further includes a connecting seat; the connecting seat is fixedly connected to the second fixed seat, and one end of the connecting seat protrudes to one side of the second fixed seat and is fixedly connected to the radial clamp.
8. The punching composite fretting wear test fixture according to claim 7, characterized in that, The second fixing seat has a second groove on one side edge facing the first fixing seat. The radial clamp part in width fits into the second groove, and the end of the connecting seat that is fixedly connected to the radial clamp covers the second groove.
9. The punching composite fretting wear test fixture according to claim 6, characterized in that, The first fixed seat is formed by stacking and connecting two first sub-seats, and can be detachably fixed to the tangential shaft; The second fixing seat is formed by stacking and connecting two second sub-seats, and can be detachably fixed to the radial shaft.
10. The punching composite fretting wear test fixture according to any one of claims 1-9, characterized in that, The tangential moving component and the radial moving component are staggered along the length of the rod-shaped specimen.