CN201689023U - Small-displacement reciprocated rolling friction-wear test device - Google Patents
Small-displacement reciprocated rolling friction-wear test device Download PDFInfo
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- CN201689023U CN201689023U CN201020000954XU CN201020000954U CN201689023U CN 201689023 U CN201689023 U CN 201689023U CN 201020000954X U CN201020000954X U CN 201020000954XU CN 201020000954 U CN201020000954 U CN 201020000954U CN 201689023 U CN201689023 U CN 201689023U
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Abstract
The utility model relates to a small-displacement reciprocated rolling friction-wear test device. A plane sample texture thereof is fixedly connected under a cross beam of a hydraulic friction tester via a tangential force sensor, a rolling sample fixture is positioned at the right side of the plane sample texture and is fixed on a stand column of a fixture support rack, and a base plate of the fixture support rack is connected on a hydraulic piston of the hydraulic friction tester; the right side of the fixture support rack is provided with a normal force sensor, a screw at the right side of the normal force sensor is in threaded connection with a support nut, the end part of the screw rod is connected with a rotary plate, and the support nut is fixed on a worktable of the hydraulic friction tester via a support; and a U-shaped groove of a U-shaped connector at the left side of the normal force sensor is sleeved on the stand column of the fixture support rack. The device can vividly and reliably simulate friction wear between a plane specimen and a rolling body, the test result is convenient for micro-analysis, and the utility model has the advantages of high automation degree, simple and convenient operation, high control and test precision and good reproducibility of test data.
Description
Technical field
The utility model relates to a kind of friction and wear test equipment, relates in particular to a kind of rolling friction abrasion test equipment.
Background technology
Roll owing to characteristics such as its friction force is little have obtained using widely in mechanical engineering.During rolling body generation rolling movement, owing to be subjected to the influence of various factors such as deformation of how much tracks, ramp, braking and transmission (traction) and rotors, rolling often is in restricted rolling condition, has the skid phenomenon between the contact interface, has adhesioin zone and slip region in the contact region usually.When the adhesioin zone occupied whole contact region, object only rolled, and did not slide; When rolling body caused friction force to increase because of traction or braking, the adhesioin zone the contact region in can constantly be reduced, at this moment object roll, sliding movement; If when the slip region had occupied whole contact region, then sliding motion only took place object, not having rolls exists, and this just makes to roll becomes a kind of tribology forms of motion of complexity.The wearing and tearing of rolling appear in the rolling parts widely, as gear, bearing, railway wheel etc., there is extremely important influence in the reliability and life-span of machine.For example: wheel is as the important running part of railway locomotive and vehicle, and rolling stock travels on that required whole actions of finishing all realize by the direct effect of wheel and rail on the track.Under this effect, running surface of wheeltrack generally is in the skid state, and wheel tread wearing and tearing and rolling contact fatigue damage will take place simultaneously and finally causes wheel to lose efficacy.So far, the relative sliding motion form of the research of rolling movement wearing character is not deep enough.
Existing rolling movement wear test equipment is the disk relative rolling type, by the relative rolling of two disks, realizes the experimental study of rolling friction wearing and tearing.But, be not easy to utilize microscope to carry out the micro-analysis of surface abrasion feature owing to all are cambered surfaces to two wear surfaces rolling.Simultaneously also can't carry out more true and reliable simulation test research to the rubbing wear between flat work pieces and the circular scrolling body (as the wearing and tearing between wheel track).
The utility model content
The purpose of this utility model provides a kind of small-displacement reciprocating rolling friction abrasion test equipment, this testing equipment can make the small-displacement reciprocating rolling friction motion that realizes under the line contact conditions easily, can more true and reliable simulation plane test specimen and rolling body between rubbing wear, test findings is convenient to carry out micro-analysis, and its automaticity height, simple to operation, control and the precision height of testing, the favorable reproducibility of test figure.
The technical scheme that its technical matters that solves the utility model adopts is, a kind of small-displacement reciprocating rolling friction abrasion test equipment, comprise plane specimen holder and the rolling specimen holder installed on computer data acquiring control system, fluid pressure type frictional testing machine, the fluid pressure type frictional testing machine, its design feature is:
The web member hinge joint of the upper end of described plane specimen holder and tangential force sensor lower end, the upper end of tangential force sensor links to each other with the crossbeam of fluid pressure type frictional testing machine;
The rolling specimen holder is positioned at the right side of plane specimen holder, and is fixed on the column of fixture support frame, and the base plate of fixture support frame is connected on the hydraulic piston of fluid pressure type frictional testing machine;
The normal force sensor is positioned at the right side of fixture support frame, and the screw flight on normal force sensor right side is connected on the holding nut, and the end of this screw rod is connected with rolling disc, and holding nut is fixed on the work top of fluid pressure type frictional testing machine by bearing; The left side of normal force sensor links to each other with U type web member, and the U type groove of U type web member is linked in the both sides, front and back of plane specimen holder, rolling specimen holder and fixture support frame column;
Tangential force sensor, normal force sensor, hydraulic piston all link to each other with the computer data acquiring control system.
The course of work of the present utility model and principle are:
With the plane sample, the rolling sample is installed in respectively on plane specimen holder and the rolling specimen holder, utilization is bolted in the groove of left anchor clamps, regulate the plane sample and make its rubbing surface and rolling sample parallel axes, make the two reach the line contact condition, the rotation rolling disc makes the screw rod on normal force sensor right side rotate along holding nut, screw rod is moved right, and then by the normal force sensor, U type web member, the plane specimen holder applies normal load between plane sample and rolling sample, and shows that by the computer data acquiring control system also acquisition method is to load data; Carry out little displacement up-and-down movement by computer data acquiring control system control hydraulic piston by the reciprocating movement displacement amplitude D, frequency f, the cycle index N that set simultaneously; Make between rolling sample and the plane sample and to produce little displacement and back and forth roll.Also by the tangent direction friction power between the friction pair of tangential force sensor measurement out-of-plane sample and rolling sample formation, and deliver to the computer data acquiring control system.The computer data acquiring control system is analyzed automatically and is drawn friction force-displacement amplitude-cycle index dynamic 3 D family curve of setting under displacement amplitude, frequency and the normal load condition, to characterize the dynamics of reciprocating rolling friction.
Compared with prior art, the beneficial effects of the utility model are:
One, the utility model equipment makes the plane sample contact formation reciprocating rolling friction pair with the rolling sample line, by regulating the plane sample it is paralleled with rolling sample axis direction, can realize the reciprocating rolling friction motion under normal load effect lower plane sample and the rolling sample line contact conditions easily, compare with the testing equipment of double plate relative rolling type, this testing equipment is that friction pair is plane-rolling sample, test findings is convenient to carry out micro-analysis with microscope, thereby more convenient abrasion mechanism analysis and the research that the plane sample material is correlated with is convenient to analyze the transition process of rolling wear mechanism.Can more true and reliablely simulate and analyze the rubbing wear between plane test specimen and the rolling body effectively.
And, adopt moving up and down of hydraulic piston to control the to-and-fro movement of rolling sample, this makes rolling sample motor behavior more steadily controlled, moving displacement amplitude precision height.
Two, measure the tangent direction friction power of friction pair by the tangential force sensor that links to each other with the plane specimen holder, and by measuring normal load with the normal force sensor on rolling specimen holder right side, tangent direction friction power and normal load are gathered automatically by the computer data acquiring control system.To-and-fro movement is driven by hydraulic piston, the moving displacement of hydraulic piston, frequency and cycle index are then accurately controlled by the computer data acquiring control system, and set control according to it or the parameter measured is carried out analyzing and processing automatically, so its automaticity height, simple to operation, control and the precision height of testing, the favorable reproducibility of test figure by computing machine.
Three, but computer data acquiring control system automatic analyser is calculated the friction force-displacement amplitude-cycle index dynamic 3 D family curve that draws under the different tests parameter, can accurately characterize the dynamics behavior of reciprocating rolling friction; And the sample after the test can be carried out other relevant microcosmic wear testing analysis.
Four, the utility model can carry out the small-displacement reciprocating rolling friction abrasion test of various materials easily by changing the material of plane sample and rolling sample.
The concrete structure of above-mentioned plane specimen holder is: the right side of clamp body has the sample groove adaptive with the plane sample, and the cell wall of sample groove below is provided with and holds out against screw.
Such clamp structure is simple, and can change plane sample and it is carried out position adjustments, is fixedly clamped easily.
The concrete structure of above-mentioned rolling specimen holder is: clamp body is I-shaped structure, and the recess sidewall in left side is provided with the axis hole that is used to install rolling sample rotation axis; The groove on right side then is stuck on the column of fixture support frame, and the rolling specimen holder is fixed on the column by the screw rod that passes right groove wall and fixture support frame column.
The rotation axis of rolling sample is fixed on being fixedly clamped of the sample of to realize on the axis hole of anchor clamps rolling.Can realize easily equally rolling sample replacing or be fixedly clamped.
Have tapped through hole on the top board of above-mentioned fixture support frame, spring collar is connected the middle and upper part of tapped through hole by its external thread, and the middle and lower part of tapped through hole is with spring, and the lower end of spring is connected with brake scotch.
Like this, the utility model can apply damping force to rolling sample top by brake scotch, makes its vertical moves by the rotating spring ring washer, i.e. the compression degree of adjustable springs, thus regulate the size of damping force easily.And because whole spring device is with the upper and lower to-and-fro movement of rolling sample, the damping force that applies is not subjected to reciprocating the influence, therefore, and the reciprocating rolling friction motion under the different braking power operating mode that can realize easily setting.Thereby the utility model can be simulated the rolling friction abrasion condition under the various actual conditions truer, reliably, and it is applied widely, test findings has more value.
Be fixed with on the above-mentioned brake scotch and penetrate the backstay that reaches the spring collar endoporus in the spring.
Like this, big lateral excursion can not take place in spring during braking, and damping force is stable, and spring is not fragile, long service life.
The measurement range of the tangential force sensor of above-mentioned testing equipment is that 1-500N, precision are 1N, and the measurement range of normal force sensor is that 1-2000N, precision are 1N, and the reciprocating movement displacement of hydraulic piston is that 1-2000 μ m, reciprocating frequency are 0.5-10Hz.
Like this, the utility model equipment can carry out the high precision of little displacement, the reciprocating rolling friction abrasion test of parameter condition on a large scale.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the plan structure synoptic diagram of the rolling sample of the rolling specimen holder of the utility model embodiment and clamping thereof.
Fig. 3 is that the displacement amplitude D that adopts the utility model equipment to carry out is respectively 2,5,10,20,60 μ m, the reciprocating rolling friction test of 1Hz, the curve that resulting The friction coefficient cycle index changes.
Fig. 4 adopts that the utility model equipment reciprocating frequence f is respectively 0.5,1,2Hz, and displacement amplitude is the reciprocating rolling friction test of 500 μ m, the curve that resulting The friction coefficient cycle index changes.
Fig. 5 is that to adopt the utility model equipment to carry out at four kinds of damping force operating mode lower frequencies be that 2Hz, displacement amplitude are the reciprocating rolling friction test of 500 μ m, the curve that resulting The friction coefficient cycle index changes.
Fig. 1, Fig. 2 illustrate, a kind of concrete enforcement formula that the utility model adopts is: a kind of small-displacement reciprocating rolling friction abrasion test equipment comprises plane specimen holder 3 and the rolling specimen holder 12 installed on computer data acquiring control system, fluid pressure type frictional testing machine 1, the fluid pressure type frictional testing machine 1.
Embodiment
The web member 2a hinge joint of the upper end of the plane specimen holder 3 that this is routine and tangential force sensor 2 lower ends, the upper end of tangential force sensor 2 links to each other with the crossbeam 1a of fluid pressure type frictional testing machine 1;
Normal force sensor 14 is positioned at the right side of fixture support frame 10, the screw rod 31 on normal force sensor 14 right sides is threaded on the holding nut 20a, and the end of this screw rod 31 is connected with rolling disc 15, and holding nut 20a is fixed on the work top 1b of fluid pressure type frictional testing machine 1 by bearing 20; The left side of normal force sensor 14 links to each other with U type web member 14a, and the U type groove of U type web member 14a is linked in the both sides, front and back of plane specimen holder 3, rolling specimen holder 12 and fixture support frame 10 column 10a;
The concrete structure of the plane specimen holder 3 that this is routine is: the right side of clamp body has the sample groove 3a adaptive with plane sample 4, and the cell wall of sample groove 3a below is provided with and holds out against screw 5.
The concrete structure of the rolling specimen holder 12 of this example is: clamp body is I-shaped structure, and the recess sidewall in left side is provided with the axis hole that is used to install rolling sample 6 rotation axis 6a; The groove on right side then is stuck on the column 10a of fixture support frame 10, and rolling specimen holder 12 is fixed on the column 10a by the screw rod 13 that passes right groove wall and fixture support frame 10 column 10a.
Have tapped through hole on the top board 10c of the fixture support frame 10 that this is routine, spring collar 7a is connected the middle and upper part of tapped through hole by its external thread, and the middle and lower part of tapped through hole is with spring 8, and the lower end of spring 8 is connected with brake scotch 9.
Be fixed with on this routine brake scotch 9 and penetrate the backstay 7 that reaches the spring collar endoporus in the spring 8.
The measurement range of the tangential force sensor 2 of the testing equipment that this is routine is that 1-500N, precision are 1N, the measurement range of normal force sensor 14 is that 1-2000N, precision are 1N, and the reciprocating movement displacement D of hydraulic piston 17 is that 1-2000 μ m, reciprocating frequency f are 0.5-10Hz.
Adopt the testing equipment of present embodiment to carry out concrete test: the plane sample is the railway wheel steel of 20mm * 10mm * 10mm, and the rolling sample is the GCr15 rolling bearing of Φ 40mm; Normal load F
n=200N; Reciprocation cycle times N=10000.Under these common test conditions, be respectively concrete test findings below in different displacement amplitudes, reciprocating frequence, damping force operating mode:
Fig. 3 is respectively 2,5,10,20,60 μ m for displacement amplitude D, and reciprocating frequence f is the reciprocating rolling friction test of 1Hz, the curve that resulting The friction coefficient cycle index changes.The curve that is strung by symbol " zero " among the figure is the curve of D=60 μ m, and all the other several curves are followed successively by the curve of D=20 μ m, 10 μ m, 5 μ m, 2 μ m from top to bottom; The result shows: 20-30 circulation back of friction factor is basicly stable; When displacement amplitude increased to 20 μ m from 2 μ m, friction factor was along with the increase of displacement amplitude increases rapidly; And two curves of displacement amplitude D20 μ m, 60 μ m are similar, show that displacement amplitude increases to 20 μ m after, friction factor no longer obviously increases with the increase of displacement amplitude.
Fig. 4 is for reciprocating frequence f is respectively 0.5,1,2Hz, and displacement amplitude is the reciprocating rolling friction test of 500 μ m, the curve that resulting The friction coefficient cycle index changes.The curve that is strung by symbol " zero " among the figure is the curve of frequency=1Hz, and the curve that is strung by symbol " △ " is the curve of frequency=2Hz, and another curve is the curve of frequency=0.5Hz; The result shows: friction factor minimum when frequency is 2Hz, and the value when frequency is 1Hz and 0.5Hz is more or less the same; Also promptly increase with frequency, friction factor is the trend of reduction.
Fig. 5 is (the tangent direction friction power mean value F of a, b, c, four kinds of damping force operating modes of d correspondence under a, b, four kinds of damping force operating modes of c, d
tBe respectively 2,14,38,72N) the reciprocating rolling friction test of displacement amplitude D=500 μ m, reciprocating frequence f=0.5Hz, the curve that resulting four The friction coefficient cycle indexes change.This figure shows the increase along with damping force, and the operation form shows as from pure rolling to the skid status transition, and the rolling slippage increases, and corresponding friction factor also increases gradually, the friction factor minimum under the free rolling condition.
According to surface damage morphology observation to the plane sample after four kinds of damping force working condition tests of a, b, c, d of Fig. 5, find: under a damped condition when being 2N corresponding to tangent direction friction power mean value, rolling sample peace interview sample is a pure rolling, and wearing and tearing show as very slight galled spots vestige; With the increase of damping force, tangent direction friction power mean value increases and be the b damped condition of 14N, and its surface abrasion aggravates rapidly, and surperficial polishing scratch presents and tangible ditch dug with a plow occurs, and ditch dug with a plow distributes along rotating direction, and wearing and tearing this moment mainly shows as abrasive wear; When damping force further increases, make the c damped condition after tangent direction friction power mean value increases to 38N, the polishing scratch surface topography presents the phenomenon that more significantly scales off; The damping force maximum is as average tangent direction friction power F
tWhen reaching the d damped condition of 72N, abrasive dust presents peeling off of big bulk, and the directivity of peeling off is not obvious.
Claims (6)
1. small-displacement reciprocating rolling friction abrasion test equipment, comprise plane specimen holder (3) and rolling specimen holder (12) that computer data acquiring control system, fluid pressure type frictional testing machine (1), fluid pressure type frictional testing machine (1) are upward installed, it is characterized in that:
Web member (2a) hinge joint of the upper end of described plane specimen holder (3) and tangential force sensor (2) lower end, the upper end of tangential force sensor (2) links to each other with the crossbeam (1a) of fluid pressure type frictional testing machine (1);
Rolling specimen holder (12) is positioned at the right side of plane specimen holder (3), and is fixed on the column (10a) of fixture support frame (10), and the base plate (10b) of fixture support frame (10) is connected on the hydraulic piston (17) of fluid pressure type frictional testing machine (1);
Normal force sensor (14) is positioned at the right side of fixture support frame (10), the screw rod (31) on normal force sensor (14) right side is threaded on the holding nut (20a), and the end of this screw rod (31) is connected with rolling disc (15), and holding nut (20a) is fixed on the work top (1b) of fluid pressure type frictional testing machine (1) by bearing (20); The left side of normal force sensor (14) links to each other with U type web member (14a), and the U type groove of U type web member (14a) is linked in the both sides, front and back of plane specimen holder (3), rolling specimen holder (12) and fixture support frame (10) column (10a);
Tangential force sensor (2), normal force sensor (14), hydraulic piston (17) all link to each other with the computer data acquiring control system.
2. a kind of small-displacement reciprocating rolling friction abrasion test equipment according to claim 1, it is characterized in that: the concrete structure of described plane specimen holder (3) is: the right side of clamp body has the sample groove (3a) adaptive with plane sample (4), and the cell wall of sample groove (3a) below is provided with and holds out against screw (5).
3. a kind of small-displacement reciprocating rolling friction abrasion test equipment according to claim 1, it is characterized in that: the concrete structure of described rolling specimen holder (12) is: clamp body is I-shaped structure, and the recess sidewall in left side is provided with the axis hole that is used to install rolling sample (6) rotation axis (6a); The groove on right side then is stuck on the column (10a) of fixture support frame (10), and rolling specimen holder (12) is fixed on the column (10a) by the screw rod (13) that passes right groove wall and fixture support frame (10) column (10a).
4. a kind of small-displacement reciprocating rolling friction abrasion test equipment according to claim 1, it is characterized in that: have tapped through hole on the top board (10c) of described fixture support frame (10), spring collar (7a) is connected the middle and upper part of tapped through hole by its external thread, the middle and lower part of tapped through hole is with spring (8), and the lower end of spring (8) is connected with brake scotch (9).
5. a kind of small-displacement reciprocating rolling friction abrasion test equipment according to claim 4 is characterized in that: be fixed with on the described brake scotch (9) and penetrate the backstay (7) that reaches spring collar (7a) endoporus in the spring (8).
6. a kind of small-displacement reciprocating rolling friction abrasion test equipment according to claim 1, it is characterized in that: the measurement range of the tangential force sensor (2) of described testing equipment is that 1-500N, precision are 1N, the measurement range of normal force sensor (14) is that 1-2000N, precision are 1N, and the reciprocating movement displacement (D) of hydraulic piston (17) is that 1-2000 μ m, reciprocating frequency (f) are 0.5-10Hz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020000954XU CN201689023U (en) | 2010-01-19 | 2010-01-19 | Small-displacement reciprocated rolling friction-wear test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020000954XU CN201689023U (en) | 2010-01-19 | 2010-01-19 | Small-displacement reciprocated rolling friction-wear test device |
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| CN201689023U true CN201689023U (en) | 2010-12-29 |
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| CN201020000954XU Expired - Lifetime CN201689023U (en) | 2010-01-19 | 2010-01-19 | Small-displacement reciprocated rolling friction-wear test device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2472133C1 (en) * | 2011-05-12 | 2013-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" | Friction test bench |
| CN103674750A (en) * | 2013-12-19 | 2014-03-26 | 上海华龙测试仪器股份有限公司 | Abrasion tester of pot type rubber bearing abrasion plate and testing method of abrasion tester |
| CN106908380A (en) * | 2017-03-31 | 2017-06-30 | 苏子昊 | A kind of use for laboratory frictional behaviour experimental rig |
| CN109752202A (en) * | 2019-03-15 | 2019-05-14 | 西南交通大学 | A kind of train disc caliper brake tester with rigidity adjustable structure |
| CN109799102A (en) * | 2019-03-15 | 2019-05-24 | 西南交通大学 | A kind of train disc caliper brake module for experimental test |
| CN112051045A (en) * | 2020-09-03 | 2020-12-08 | 北京航空航天大学 | Dynamic test determination method for particle rolling resistance model parameters |
| CN113310787A (en) * | 2021-07-08 | 2021-08-27 | 济南大学 | Multifunctional friction wear test device under controllable stable magnetic field environment |
| CN115046878A (en) * | 2022-06-14 | 2022-09-13 | 燕山大学 | Dual-form friction wear detection device for non-metallic material |
| CN118150380A (en) * | 2024-05-13 | 2024-06-07 | 西南交通大学 | Device and method for dynamically measuring fretting fatigue friction coefficient |
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2010
- 2010-01-19 CN CN201020000954XU patent/CN201689023U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2472133C1 (en) * | 2011-05-12 | 2013-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный университет" | Friction test bench |
| CN103674750A (en) * | 2013-12-19 | 2014-03-26 | 上海华龙测试仪器股份有限公司 | Abrasion tester of pot type rubber bearing abrasion plate and testing method of abrasion tester |
| CN106908380A (en) * | 2017-03-31 | 2017-06-30 | 苏子昊 | A kind of use for laboratory frictional behaviour experimental rig |
| CN109752202A (en) * | 2019-03-15 | 2019-05-14 | 西南交通大学 | A kind of train disc caliper brake tester with rigidity adjustable structure |
| CN109799102A (en) * | 2019-03-15 | 2019-05-24 | 西南交通大学 | A kind of train disc caliper brake module for experimental test |
| CN109799102B (en) * | 2019-03-15 | 2023-12-12 | 西南交通大学 | Train disc type caliper brake module for test |
| CN109752202B (en) * | 2019-03-15 | 2023-12-12 | 西南交通大学 | Train disc type caliper brake test bed with rigidity adjustable structure |
| CN112051045A (en) * | 2020-09-03 | 2020-12-08 | 北京航空航天大学 | Dynamic test determination method for particle rolling resistance model parameters |
| CN112051045B (en) * | 2020-09-03 | 2021-06-18 | 北京航空航天大学 | Dynamic test determination method for particle rolling resistance model parameters |
| CN113310787A (en) * | 2021-07-08 | 2021-08-27 | 济南大学 | Multifunctional friction wear test device under controllable stable magnetic field environment |
| CN115046878A (en) * | 2022-06-14 | 2022-09-13 | 燕山大学 | Dual-form friction wear detection device for non-metallic material |
| CN118150380A (en) * | 2024-05-13 | 2024-06-07 | 西南交通大学 | Device and method for dynamically measuring fretting fatigue friction coefficient |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20101229 Effective date of abandoning: 20100119 |