CN103411824B - Paper-based friction material test clamp and test method thereof - Google Patents
Paper-based friction material test clamp and test method thereof Download PDFInfo
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- CN103411824B CN103411824B CN201310303373.1A CN201310303373A CN103411824B CN 103411824 B CN103411824 B CN 103411824B CN 201310303373 A CN201310303373 A CN 201310303373A CN 103411824 B CN103411824 B CN 103411824B
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Abstract
The invention discloses a paper-based friction material test clamp and a test method thereof to solve a technical problem that the test of the paper-based friction material through using present test clamps is difficult. A technical scheme adopted in the invention is characterized in that the test clamp is composed of a clamp body, a positioning spline, a magnet and a core plate; the clamp body has a metal disc-shaped structure and is used for clamping and positioning the paper-based friction material, and a core plate positioning groove and a magnet mounting hole are arranged on the end surface of the clamp body; the positioning spline is a metal sheet having an external spline and is fixed in the positioning groove of the core plate; the magnet is fixed in the magnet mounting hole; and the core plate is a ferromagnetic metal sheet having an internal spline. The paper-based friction material is bonded on the core plate before test, and the core plate is positioned on the clamp body depended on the suction between the above splines and the magnet during the test. The clamp and the method solve a technical problem that the paper-based friction material directly bonded on a disc is difficult to remove; and the core plate has the advantages of simple structure, convenient processing, and convenient implementation of tests of different samples only through replacing the core plate by adopting the same clamp.
Description
Technical field
The present invention relates to a kind of test fixture, particularly relate to a kind of paper friction material test fixture.Also relate to and utilize this paper friction material test fixture test paper base frication material method.
Background technology
Paper friction material is a kind of Wet-type friction material adopting paper technology shaping, because it does not hinder antithesis, have high kinetic friction coefficient, quiet kinetic friction coefficient close to and excellent abrasion resistance properties be widely used at automobile and engineering machinery wet clutch and detent.At present, the test of paper friction material frictional behaviour mainly adopts SAE No.2 testing machine in the world, domestic main employing MM1000 series and QM1000 series of friction abrasion performance testing machine.Existing testing apparatus, when carrying out friction material test clamping, generally have employed method friction material being bonded to platter.Need before sample testing to bond to platter in advance, multiple sample testing needs the platter preparing multiple heaviness, brings inconvenience to test operation, and after test, sample is difficult to take off from platter.
Document " patent No. is the United States Patent (USP) of US3640118 " discloses a kind of friction testing equipment and method of testing, make the more realistic operating mode of friction factor by the improvement structure of friction testing arrangement and the geometric configuration of friction pair, the method adopting testing friction reacting force to calculate friction factor makes the test of friction factor, and science is accurate more.But invention in announce friction material test fixture for be Metal Substrate friction material, be not suitable for the test clamping of paper friction material.
Summary of the invention
In order to overcome the large deficiency of existing test fixture test paper base frication material difficulty, the invention provides a kind of paper friction material test fixture.This test fixture is made up of jig main body, location spline, magnet and central layer; Jig main body is metal dish configuration, and its one end has spline for the connection with testing machine, and the other end is used for the Set and Positioning of paper friction material, and its end face is processed with central layer detent and magnet mounting hole; Location spline is the sheet metal with male splines, and be fixed in the central layer detent of jig main body, its thickness is identical with the depth dimensions of central layer detent; Magnet is ferromagnetism magnet, adopts interference fit or bonding mode to be fixed in magnet mounting hole, for realizing the absorption location of central layer; Central layer is the ferromagnetic metal thin plate with female spline, and its female spline and location spline match and be clearance fit, and its thickness is identical with the thickness of location spline.Before test, paper friction material is bonded on central layer, during test, only central layer need be relied on the suction of spline and magnet be positioned on jig main body.Background technology can be solved and paper friction material is directly bonded in technical matters disk body being difficult to take off; The simple and convenient processing of core plate structure, adopts same fixture, only needs to change the test that central layer can carry out various sample easily.
The present invention also provides and utilizes this paper friction material test fixture test paper base frication material method.
The technical solution adopted for the present invention to solve the technical problems is: a kind of paper friction material test fixture, is characterized in comprising jig main body 1, location spline 2, magnet 3 and central layer 4.Described jig main body 1 is metal dish configuration, specimen clamping portion 1a on jig main body 1 is used for the Set and Positioning of paper friction material 5, its right side is processed with specimen clamping groove 1c, sample dismounting groove 1d and magnet mounting hole 1e, jig-attachment part 1b on jig main body 1 has spline 1g, and the axle center of jig main body 1 has A fabrication hole 1f; The diameter of specimen clamping portion 1a is greater than the external diameter 10-20mm of paper friction material 5; The size of jig-attachment part 1b and the interface size of institute's joint test machine etc. are large; The diameter of specimen clamping groove 1c coordinates with the crest clearance of central layer 4, and its degree of depth is identical with the thickness of central layer 4; The degree of depth of magnet mounting hole 1e is greater than below the length 1mm of magnet; The shape of spline 1g and the Interface Matching of institute's joint test machine; Location spline 2 is the sheet metal being processed with B fabrication hole 2b with male splines 2a center, is connected in the specimen clamping groove 1c of jig main body 1, and the thickness of location spline 2 is identical with the degree of depth of detent on central layer 4; The diameter of B fabrication hole 2b is identical and concentric with the diameter of A fabrication hole 1f; Magnet 3 adopts interference fit or bonding mode to be fixed in magnet mounting hole 1e, for realizing the absorption location of central layer 4; Central layer 4 is the ferromagnetic metal thin plates with female spline 4a, and the female spline 4a on central layer 4 mates with male splines 2a and is clearance fit, and the thickness of central layer 4 is identical with the thickness of location spline 2; The external diameter of central layer 4 is more than or equal to the external diameter of paper friction material 5, and female spline 4a root diameter is less than the internal diameter of paper friction material 5, to ensure the test not affecting paper friction material 5 performance after paper friction material 5 is bonded in central layer 4; Flatness≤the 0.03mm of central layer 4, the depth of parallelism≤0.05mm.
The thickness of described specimen clamping portion 1a is 5-10mm.
The thickness of described central layer 4 is 1-2mm.
One utilizes above-mentioned paper friction material test fixture test paper base frication material method, is characterized in comprising the following steps:
Step one, will need test paper friction material 5 bond on central layer 4, paper friction material 5 is concentric with central layer 4.
Step 2, location spline 2 to be connected in specimen clamping groove 1c, to make B fabrication hole 2b concentric with A fabrication hole 1f, magnet 3 is assemblied in magnet mounting hole 1e with interference fit.
Step 3, be assembled in specimen clamping groove 1c by the central layer 4 of bonding paper friction material 5, the one side being stained with paper friction material 5 is in outside.
Step 4, paper friction material test fixture is assemblied on testing machine, carries out the test of paper friction material 5 frictional behaviour.
Step 5, test terminate, and taken off from fixture by sample dismounting groove 1d by the central layer 4 of bonding paper friction material 5, replacing central layer 4 and paper friction material 5 carry out new test.
The invention has the beneficial effects as follows: paper friction material test fixture is made up of jig main body, location spline, magnet and central layer; Jig main body is metal dish configuration, and its one end has spline for the connection with testing machine, and the other end is used for the Set and Positioning of paper friction material, and its end face is processed with central layer detent and magnet mounting hole; Location spline is the sheet metal with male splines, and be fixed in the central layer detent of jig main body, its thickness is identical with the depth dimensions of central layer detent; Magnet is ferromagnetism magnet, adopts interference fit or bonding mode to be fixed in magnet mounting hole, for realizing the absorption location of central layer; Central layer is the ferromagnetic metal thin plate with female spline, and its female spline and location spline match and be clearance fit, and its thickness is identical with the thickness of location spline.Before test, paper friction material is bonded on central layer, during test, only central layer need be relied on the suction of spline and magnet be positioned on jig main body.Solve background technology and paper friction material is directly bonded in technical matters disk body being difficult to take off; The simple and convenient processing of core plate structure, adopts same fixture, only needs to change the test that central layer can carry out various sample easily.
Below in conjunction with drawings and Examples, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is the explosive view of paper friction material test fixture of the present invention;
Fig. 2 is the front view of paper friction material test fixture of the present invention;
Fig. 3 is the A-A cut-open view of Fig. 2.
In figure, 1-jig main body; 1a-specimen clamping portion; 1b-jig-attachment part; 1c-specimen clamping groove; 1d-sample dismounting groove; 1e-magnet mounting hole; 1f-A fabrication hole; 1g-spline; 2-locates spline; 2a-male splines; 2b-B fabrication hole; 3-magnet; 4-central layer; 4a-female spline; 5-paper friction material.
Embodiment
Following examples are with reference to Fig. 1-3.
Embodiment 1.Paper friction material test fixture of the present invention comprises jig main body 1, location spline 2, magnet 3 and central layer 4.Jig main body 1 is metal dish configuration, specimen clamping portion 1a on jig main body 1 is used for the Set and Positioning of paper friction material 5, its right side is processed with specimen clamping groove 1c, sample dismounting groove 1d and magnet mounting hole 1e, jig-attachment part 1b has spline 1g for the connection with friction testing equipment, the axle center of jig main body 1 has A fabrication hole 1f, for alleviating clamp weight; Specimen clamping portion 1a reduces thickness under the prerequisite ensureing fixture strength and stiffness as far as possible, and to reduce the weight of fixture, its thickness preferentially chooses 5-10mm; The diameter of specimen clamping portion 1a is greater than the external diameter of paper friction material 5, prioritizing selection 10-20mm larger than the external diameter of paper friction material 5; The size of jig-attachment part 1b is determined according to the interface size of institute's joint test machine, to realize with the reliable connection of testing machine as principle; Specimen clamping groove 1c size is determined according to the size of central layer 4, and the crest clearance of its diameter and central layer 4 coordinates, and its degree of depth is identical with the thickness of central layer 4; Sample dismounting groove 1d is difficult to take off because central layer 4 is held by magnet 3 for preventing test from terminating rear paper friction material 5, and the technology groove for convenience detach of processing, and its shape can be square or other geometric configuratioies, takes off as principle with what facilitate central layer 4; The size and dimension of magnet mounting hole 1e is determined according to the shape and size of magnet 3, and affect clamping effect after installing for avoiding magnet, the degree of depth of mounting hole 1e is slightly larger than the length of magnet, and the length exceeded is preferably at below 1mm; A fabrication hole 1f is not the structure that must process, and its size is determined according to the size of jig-attachment part 1b and paper friction material 5, can select under special circumstances not process; The shape and size of spline 1g are determined according to the interface shape of institute's joint test machine and size; Location spline 2 is the sheet metal being processed with B fabrication hole 2b with male splines 2a center, and adopt the mode of welding to be assemblied in the specimen clamping groove 1c of jig main body 1, its thickness is identical with the depth dimensions of central layer detent; Ensure when location spline 2 welds warpage not to occur, and welding does not affect the matching relationship of male splines 2a as far as possible; The diameter of B fabrication hole 2b is identical with the diameter of A fabrication hole 1f, ensures that B fabrication hole 2b and A fabrication hole 1f is concentric when location spline 2 assembles; The strong magnetic material that magnet 3 preferentially selects suction strong makes, and it adopts interference fit or bonding mode to be fixed in magnet mounting hole 1e, for realizing the absorption location of central layer 4; Central layer 4 is the ferromagnetic metal thin plate with female spline 4a, and its female spline 4a and male splines 2a mates and is clearance fit, and the thickness of central layer 4 is identical with the thickness of location spline 2; The external diameter of central layer 4 is more than or equal to the external diameter of paper friction material 5, and female spline 4a root diameter is less than the internal diameter of paper friction material 5, to ensure the test not affecting paper friction material 5 performance after paper friction material 5 is bonded in central layer 4; The thickness prioritizing selection 1-2mm of central layer 4, its two plane needs to have high flatness and the depth of parallelism, general control flatness≤0.03mm, the depth of parallelism≤0.05mm.Before carrying out friction testing, paper friction material 5 is bonded on metal core board, only need the suction of spline and magnet be relied on to be positioned on jig main body 1 central layer 4 during test, change and traditional paper friction material 5 is directly bonded in problem disk body being difficult to take off; The simple and convenient processing of core plate structure, adopts same fixture, only needs to change the test that central layer 4 can carry out various sample easily.
Embodiment 2.Utilize embodiment 1 paper friction material test fixture test paper base frication material method, concrete steps are as follows.
1) paper friction material 5 of test will be needed to bond to the one side of central layer 4, time bonding, ensure the concentric of paper friction material 5 and central layer 4.
2) carry out the assembling of fixture, adopt the mode of welding to be assemblied in specimen clamping groove 1c location spline 2, assembling ensures that B fabrication hole 2b and A fabrication hole 1f is concentric, by magnet 3 with interference fit in magnet mounting hole 1e.
3) be assembled in specimen clamping groove 1c by the central layer 4 after bonding paper friction material 5, the one side being stained with paper friction material 5 is in outside.
4) friction material is tested clamping device and be assemblied in frictional testing machine, carry out the test of paper friction material 5 frictional behaviour.
5) test terminates, and taken off from fixture by sample dismounting groove 1d by the central layer 4 of bonding paper friction material 5, replacing central layer 4 and paper friction material 5 can carry out new test.
Claims (4)
1. a paper friction material test fixture, is characterized in that: comprise jig main body (1), location spline (2), magnet (3) and central layer (4); Described jig main body (1) is metal dish configuration, specimen clamping portion (1a) on jig main body (1) is for the Set and Positioning of paper friction material (5), its right side is processed with specimen clamping groove (1c), sample dismounting groove (1d) and magnet mounting hole (1e), jig-attachment part (1b) on jig main body (1) has spline (1g), and the axle center of jig main body (1) has A fabrication hole (1f); The diameter 10-20mm larger than the external diameter of paper friction material (5) in specimen clamping portion (1a); The size of jig-attachment part (1b) and the interface size of institute's joint test machine etc. are large; The diameter of specimen clamping groove (1c) coordinates with the crest clearance of central layer (4), and its degree of depth is identical with the thickness of central layer (4); The degree of depth of magnet mounting hole (1e) is greater than below the length 1mm of magnet; The shape of spline (1g) and the Interface Matching of institute's joint test machine; Location spline (2) is the sheet metal being processed with B fabrication hole (2b) with male splines (2a) center, be connected in the specimen clamping groove (1c) of jig main body (1), the thickness of location spline (2) is identical with the degree of depth of the upper detent of central layer (4); The diameter of B fabrication hole (2b) is identical and concentric with the diameter of A fabrication hole (1f); Magnet (3) adopts interference fit or bonding mode to be fixed in magnet mounting hole (1e), for realizing the absorption location of central layer (4); Central layer (4) is the ferromagnetic metal thin plate with female spline (4a), female spline (4a) on central layer (4) mates with male splines (2a) and is clearance fit, and the thickness of central layer (4) is identical with the thickness of location spline (2); The external diameter of central layer (4) is more than or equal to the external diameter of paper friction material (5), female spline (4a) root diameter is less than the internal diameter of paper friction material (5), to ensure the test not affecting paper friction material (5) performance after paper friction material (5) is bonded in central layer (4); Flatness≤the 0.03mm of central layer (4), the depth of parallelism≤0.05mm.
2. paper friction material test fixture according to claim 1, is characterized in that: the thickness of described specimen clamping portion (1a) is 5-10mm.
3. paper friction material test fixture according to claim 1, is characterized in that the thickness of described central layer (4) is 1-2mm.
4. utilize a paper friction material test fixture test paper base frication material method described in claim 1, it is characterized in that comprising the following steps:
Step one, will need test paper friction material (5) bond on central layer (4), paper friction material (5) is concentric with central layer (4);
Step 2, spline (2) will be located be connected in specimen clamping groove (1c), make B fabrication hole (2b) concentric with A fabrication hole (1f), magnet (3) is assemblied in magnet mounting hole (1e) with interference fit;
Step 3, be assembled in specimen clamping groove (1c) by the central layer (4) of bonding paper friction material (5), the one side being stained with paper friction material (5) is in outside;
Step 4, paper friction material test fixture is assemblied on testing machine, carries out the test of paper friction material (5) frictional behaviour;
Step 5, test terminate, taken off from fixture by sample dismounting groove (1d) by the central layer (4) of bonding paper friction material (5), replacing central layer (4) and paper friction material (5) carry out new test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310303373.1A CN103411824B (en) | 2013-07-18 | 2013-07-18 | Paper-based friction material test clamp and test method thereof |
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| CN201310303373.1A CN103411824B (en) | 2013-07-18 | 2013-07-18 | Paper-based friction material test clamp and test method thereof |
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| CN103411824B true CN103411824B (en) | 2015-03-04 |
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| CN110057663B (en) * | 2019-02-28 | 2024-07-16 | 西南交通大学 | Electromagnetic Hopkinson torsion bar clamping and releasing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3640118A (en) * | 1970-03-09 | 1972-02-08 | Teletype Corp | Friction-testing apparatus and methods |
| CN201508304U (en) * | 2009-09-27 | 2010-06-16 | 刘学耕 | Dry/wet-type test stand with frictional-wear performance |
| CN201653837U (en) * | 2010-01-29 | 2010-11-24 | 北京工业大学 | End-surface friction pair applied to abrasion property test of laser cladding layers |
| CN102689440A (en) * | 2012-06-06 | 2012-09-26 | 西北工业大学 | Device for indexing and resetting paper-based friction plate during attaching |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5713469Y2 (en) * | 1977-02-23 | 1982-03-18 |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3640118A (en) * | 1970-03-09 | 1972-02-08 | Teletype Corp | Friction-testing apparatus and methods |
| CN201508304U (en) * | 2009-09-27 | 2010-06-16 | 刘学耕 | Dry/wet-type test stand with frictional-wear performance |
| CN201653837U (en) * | 2010-01-29 | 2010-11-24 | 北京工业大学 | End-surface friction pair applied to abrasion property test of laser cladding layers |
| CN102689440A (en) * | 2012-06-06 | 2012-09-26 | 西北工业大学 | Device for indexing and resetting paper-based friction plate during attaching |
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Effective date of registration: 20200415 Address after: 710000 Xianhu road junction, Fengxi new town, Xixian New District, Xi'an City, Shaanxi Province Patentee after: SHAANXI HANGFENG NEW MATERIAL Co.,Ltd. Address before: 710072 Xi'an friendship West Road, Shaanxi, No. 127 Patentee before: Northwestern Polytechnical University |
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Denomination of invention: Test fixture and test method of paper-based friction material Effective date of registration: 20220419 Granted publication date: 20150304 Pledgee: Shaanxi Aviation Industry Development Group Co.,Ltd. Pledgor: SHAANXI HANGFENG NEW MATERIAL Co.,Ltd. Registration number: Y2022610000156 |