CN109444042B - Friction piece paste strength testing arrangement - Google Patents
Friction piece paste strength testing arrangement Download PDFInfo
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- CN109444042B CN109444042B CN201811598929.3A CN201811598929A CN109444042B CN 109444042 B CN109444042 B CN 109444042B CN 201811598929 A CN201811598929 A CN 201811598929A CN 109444042 B CN109444042 B CN 109444042B
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000010008 shearing Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 239000002783 friction material Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 6
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a friction piece pasting strength testing device, which comprises: the base comprises a base body, wherein the base body is a shell with one end closed and the other end open, the closed end of the base body forms a bearing surface of the base, and a first groove with the same shape as the friction element is formed in the bearing surface; one side wall of the base body is provided with a slide way, and the slide way penetrates through the open end and the closed end of the base body; the base body, the first groove and the slideway are integrally formed; the friction piece comprises a friction body and a back plate; the fixing component is used for compacting the friction body positioned in the first groove, and the backboard is exposed out of the first groove; the sliding pressure head slides along the slideway, the shape of the slideway is consistent with that of the sliding pressure head so as to apply shearing force on the backboard, a second groove is formed in the contact surface of the sliding pressure head and the backboard, and the shape of the second groove is consistent with that of the backboard. The device has the advantages of light structure, high measurement precision and the like.
Description
Technical Field
The invention relates to the technical field of high-speed railway braking, in particular to a friction piece pasting strength testing device.
Background
The technology of China high-speed rail is rapidly developed, the highest speed per hour of a train is continuously improved, and the highest operation speed per hour of the Fuxing number CR400 reaches 400 km, and the continuous speed per hour is 350 km. With the continuous increase in speed, performance requirements for the braking system are continually increasing.
At present, the high-speed railway is mainly braked by adopting a powder metallurgy brake pad, and the powder metallurgy brake pad mainly comprises parts such as a friction piece, an adjusting pad, a steel back, a clamp spring and the like. The friction body and the backboard are welded together through a transition layer, the bonding strength between the friction body and the backboard directly influences the braking performance of the high-speed train, once the bonding strength between the friction body and the backboard is lower than the shearing strength of the friction body, the friction body cannot fall off and be consumed in a layered mode under the action of friction force between the friction body and a brake disc or between wheels when the train brakes, the friction body can be broken firstly to fly out from between the friction body and the backboard, the braking effect is lost, if under the conditions of no electric braking and full brake pad emergency braking, the high-speed railway looks like a bridge which is taken off, even the loss caused by casualties when the rail is thrown out, and therefore, the detection and the real evaluation of the bonding strength between the friction body of the high-speed railway brake pad and the backboard are very important.
The device for measuring the friction body and the backboard is complex in structure, and the quality of a pressure head for measuring the shearing force is heavy, so that the measuring precision is seriously affected.
Disclosure of Invention
Aiming at the technical problems, the invention provides the friction sticking strength testing device which is simple in structure, light in weight and high in measurement accuracy.
The invention relates to a friction piece pasting strength testing device, which comprises:
The base comprises a base body, wherein the base body is a shell with one end closed and the other end open, the closed end of the base body forms a bearing surface of the base, and a first groove with the same shape as the friction element is formed in the bearing surface; one side wall of the base body is provided with a slide way, and the slide way penetrates through the open end and the closed end of the base body; the base body, the first groove and the slideway are integrally formed; the friction piece comprises a friction body and a back plate; the fixing component is used for compacting the friction body positioned in the first groove, and the backboard is exposed out of the first groove; the sliding pressure head slides along the slideway, the shape of the slideway is consistent with that of the sliding pressure head so as to apply shearing force on the backboard, a second groove is formed in the contact surface of the sliding pressure head and the backboard, and the shape of the second groove is consistent with that of the backboard.
Preferably, the base is integrally formed by a laser selective melting technology.
Preferably, the base is made of 18Ni300 powder and is integrally formed by a laser selective melting technology; the particle size of the 18Ni300 powder is 15 to 62 microns.
Preferably, a first through hole is formed in the side wall of the base body opposite to the slideway, and an adjusting piece capable of screwing in or screwing out is arranged to penetrate through the first through hole so as to adjust the position of the friction body in the first groove.
Preferably, the fixing assembly includes: the movable block is used for compacting the friction; a third groove is formed in the end face, in contact with the friction piece, and the shape of the third groove is consistent with that of the friction piece; the two sides of the third groove are provided with first blind holes, the bearing surfaces on the two sides of the first groove are provided with second blind holes at positions corresponding to the first blind holes, the first blind holes and the second blind holes are elastic piece positioning holes, and the movable blocks can be ejected out through elastic pieces; and the cover plate is fixedly connected with the opening end of the base body so as to compress the movable block.
Preferably, a plurality of second through holes are formed in the cover plate at positions opposite to the movable blocks, and a plurality of bolts penetrate through the second through holes to compress or loosen the movable blocks.
Preferably, a third through hole is formed in the cover plate at a position corresponding to the side wall of the base body, a fourth through hole is formed in the base body at a position corresponding to the third through hole, and locking bolts are arranged in the corresponding third through hole and fourth through hole so that the cover plate compresses the movable block.
Preferably, the sliding pressure head is provided with a handle which is convenient to hold.
The invention adopts the technical scheme and has the following advantages:
1. According to the friction piece pasting strength testing device, the first groove which is consistent with the shape of the friction piece is formed in the base, and the friction body is fixedly connected with the base through the fixing component, so that the friction body is ensured to be in close contact with the base in the testing process. Meanwhile, the base is provided with the slideway with the same shape as the sliding pressure head, the sliding pressure head is in track contact with the base, so that the shearing force applied by the sliding pressure head is ensured to completely act on the backboard in the testing process, and the testing accuracy is improved.
2. According to the friction element bonding strength testing device, the base is integrally formed by adopting the laser selective melting technology, parts such as the lower pressing plate and the bottom plate are omitted, the structure is light and novel, damage to the base due to the fact that shearing force is applied in the testing process is avoided, and the stability of the base is improved.
3. According to the friction piece pasting strength testing device, the sliding pressure head is provided with the second groove which is consistent with the shape of the backboard, the contact area of the sliding pressure head and the backboard is increased during a shearing experiment, and all shearing forces are applied to the backboard.
4. According to the friction piece adhesion strength testing device, the elastic piece is arranged between the movable block and the first groove, and fixation before testing and flexible taking out after testing of the friction piece with the backboard can be achieved through compression and rebound of the elastic piece.
Drawings
FIG. 1 is a schematic view of a structure of a friction plate according to the present invention;
FIG. 2 is a perspective view of one embodiment of a friction fit bond strength testing device according to the present invention;
FIG. 3 is a schematic view of a base structure of the present invention;
FIG. 4 is a schematic diagram of a cover plate structure according to the present invention;
FIG. 5 is a schematic view of a loose piece according to the present invention.
Reference numerals:
1. Base, 10, base body, 11, first recess, 12, slide, 13, first through hole, 14, resilient member, 2, friction element, 20, friction element, 21, back plate, 3, securing assembly, 30, loose piece, 31, second blind hole, 32, cover plate, 33, second through hole, 34, third through hole, 35, fourth through hole, 36, bolt, 37, locking bolt, 301, third recess, 302, first blind hole, 4, sliding ram, 40, second recess, 41, handle, 5.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the friction member 2 includes a friction body 20 and a back plate 21, and the friction body 20 and the back plate 21 are fusion welded together by a transition layer.
In order to solve the problems that the friction body has larger quality and low testing precision in the testing process, the invention provides a friction body bonding strength testing device for solving the technical problems.
Referring to fig. 2, the invention comprises a base 1, wherein the base 1 comprises a base body 10, the base body 10 is a shell with one end closed and the other end open, the closed end of the base body 10 forms a bearing surface of the base 1, and a first groove 11 with the same shape as a friction piece 2 is formed on the bearing surface; one side wall of the base body 10 is provided with a slide rail 12, and the slide rail 12 penetrates through the open end and the closed end of the base body 10; the base body 10, the first groove 11 and the slideway 12 are integrally formed; the friction body 2 comprises a friction body 20 and a back plate 21; the fixing component 3, the fixing component 3 is used for pressing the friction body 20 positioned in the first groove 11, and the backboard 21 is exposed out of the first groove 11; the sliding pressure head 4 slides along the slideway 12, the slideway 12 is in the same shape as the sliding pressure head 4 to apply shearing force on the backboard 21, the contact surface of the sliding pressure head 4 and the backboard 21 is provided with the second groove 40, and the shape of the second groove 40 is in the same shape as the backboard 21. The sliding ram 4 is provided with a handle 41 for easy gripping.
In this embodiment, the base body 10, the first groove 11 and the slideway 12 are integrally formed, the laser selective melting technology is adopted for integrally forming, and the 18Ni300 powder adopted for the base 1 is integrally formed by the laser selective melting technology; the particle size of the 18Ni300 powder is 15 to 62 microns.
By adopting the technical scheme, the first groove 11 which is arranged on the base body 10 and has the same shape as the friction body 20 ensures that the friction body 20 is tightly attached to the base body 10 in the testing process; the slideway 12 which is arranged on the base 1 and is consistent with the shape of the head of the sliding pressure 4 ensures that the sliding pressure 4 and the base 1 keep track contact, so that all shearing force applied on the sliding pressure 4 completely acts on the backboard 21. The base body 10, the first groove 11 and the slideway 12 are integrally formed, parts such as a lower pressing plate and a bottom plate are omitted, the structure is light and novel, and the stability of the base 1 is ensured. In addition, since the second groove 40 is in conformity with the shape of the back plate 21, the contact area of the sliding indenter 4 with the back plate 21 is increased, and all the force applied to the sliding indenter 4 acts on the back plate 21 when the shearing experiment is performed; because the sliding pressure head 4 adopts a single-side grab handle, the weight of the sliding pressure head 4 is reduced, and the testing precision is improved.
Further, as shown in fig. 3, a first through hole 13 is formed on a side wall of the base body 10 opposite to the slideway 12, and an adjusting member 5 capable of being screwed in or out is disposed through the first through hole 13 to adjust the position of the friction body 20 in the first groove 11.
By adopting the technical scheme, the position of the friction body 20 is adjusted through the adjusting piece 5 arranged on the first through hole 13, so that the back plate 21 is completely positioned below the second groove 40 of the sliding pressure head 4 in the testing process.
Further, with reference to fig. 2,3 and 4, the fixing assembly 3 includes: a movable block 30 for pressing the friction member 12; as shown in fig. 5, the end surface contacting with the friction body 2 is provided with a third groove 301, and the shape of the third groove 301 is consistent with that of the friction body 20; the two sides of the third groove 301 are provided with first blind holes 302, the bearing surfaces on the two sides of the first groove 11 are provided with second blind holes 31 at positions corresponding to the first blind holes 302, the first blind holes 302 and the second blind holes 31 are positioning holes of the elastic piece 14, and the movable block 30 can be ejected out through the elastic piece 14; the cover plate 32, the cover plate 32 is fastened and connected with the opening end of the base body 10 to compress the loose piece 30. The cover plate 32 is provided with a plurality of second through holes 33 at positions opposite to the movable block 30, and a plurality of bolts 36 are arranged to penetrate through the second through holes 33 so as to press or loosen the movable block 30.
By adopting the technical scheme, the elastic piece 14 is positioned through the first blind hole 302 and the second blind hole 31, and the loose piece 30 is tightly connected with the base 1 through bolts arranged on the second through hole 33 on the elastic piece 14 and the cover plate 32 in the fixed assembly 3. Before the test is carried out, the elastic piece 14 is in a free state, during the test, the elastic piece 14 is tightly pressed, the friction body 20 is fastened through the movable block 30 and the cover plate 32, after the test is finished, the elastic piece 14 is naturally rebounded and jacked, the friction body 20 is in a free state, and the convenience in taking the friction body 20 during the test is ensured by the arrangement of the elastic piece 14.
In this embodiment, the elastic member 14 is a spring.
On the basis of the above embodiment, further, the cover plate 32 is provided with the third through hole 34 at a position corresponding to the side wall of the base body 10, the base body 10 is provided with the fourth through hole 35 at a position corresponding to the third through hole 34, and the locking bolt 37 is arranged in the third through hole 34 and the fourth through hole 35, so that the cover plate 32 compresses the movable block 30.
By adopting the technical scheme, the cover plate 32 is tightly connected with the base 1 through the locking bolt 37.
The application method of the invention is as follows:
The friction body 2 to be tested is arranged in the first groove 11 on the base 1, the adjusting piece 5 is rotated, the back plate 21 is exposed out of the first groove 11, the bolt 36 arranged on the second through hole 33 is screwed, the movable block 30 descends and compresses the spring, and the friction body 20 is pressed in the first groove 11. The sliding ram 4 is placed along the slideway 12 such that the back plate 21 is naturally under the second recess 40 of the sliding ram 4. Starting the universal testing machine, completely applying pressure on the sliding pressure head 4, separating the back plate 21 from the friction body 20 along with the time, and reading the data on the universal testing machine and the area of the transition layer to obtain the bonding strength of the friction body 2.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Various modifications and improvements of the technical scheme of the present invention will fall within the protection scope of the present invention without departing from the design concept of the present invention, and the technical content of the present invention is fully described in the claims.
Claims (7)
1. The utility model provides a friction piece paste intensity testing arrangement which characterized in that includes:
The base comprises a base body, wherein the base body is a shell with one end closed and the other end open, the closed end of the base body forms a bearing surface of the base, and a first groove consistent with the shape of the friction element is formed in the bearing surface; one side wall of the base body is provided with a slide way, and the slide way penetrates through the opening end and the closed end of the base body; the base body, the first groove and the slideway are integrally formed;
the friction piece comprises a friction body and a back plate;
the fixing component is used for pressing the friction body positioned in the first groove, and the backboard is exposed out of the first groove;
The sliding pressure head slides along the slideway, the shape of the slideway is consistent with that of the sliding pressure head, the sliding pressure head is ensured to keep track contact with the base so as to apply shearing force on the backboard, a second groove is formed in the contact surface of the sliding pressure head and the backboard, and the shape of the second groove is consistent with that of the backboard; the sliding pressure head is provided with a handle which is convenient to hold.
2. The device for testing the bonding strength of a friction member according to claim 1, wherein the base is integrally formed by a laser selective melting technique.
3. The device for testing the sticking strength of a friction material according to claim 2, wherein the base is made of 18Ni300 powder and is integrally formed by the laser selective melting technology; the particle size of the 18Ni300 powder is 15 to 62 microns.
4. The device for testing the sticking strength of a friction member according to claim 1, wherein a first through hole is formed in a side wall of the base body opposite to the slide rail, and a screw-in or screw-out adjusting member is provided through the first through hole to adjust the position of the friction body in the first groove.
5. The friction fit strength testing device according to claim 1, wherein the fixing assembly comprises: the movable block is used for compressing the friction piece; a third groove is formed in the end face, in contact with the friction piece, of the friction piece, and the shape of the third groove is consistent with that of the friction piece; the two sides of the third groove are provided with first blind holes, the bearing surfaces on the two sides of the first groove are provided with second blind holes at positions corresponding to the first blind holes, the first blind holes and the second blind holes are elastic piece positioning holes, and the movable blocks can be ejected out through the elastic pieces;
And the cover plate is fixedly connected with the opening end of the base body so as to compress the movable block.
6. The device for testing the adhesion strength of a friction shoe according to claim 5, wherein a plurality of second through holes are formed in the cover plate at positions opposite to the movable block, and a plurality of bolts are arranged through the second through holes so as to press or release the movable block.
7. The device for testing the sticking strength of a friction member according to claim 5, wherein a third through hole is formed in the cover plate at a position corresponding to the side wall of the base body, a fourth through hole is formed in the base body at a position corresponding to the third through hole, and locking bolts are disposed in the third through hole and the fourth through hole corresponding to the third through hole, so that the cover plate is pressed against the movable block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598929.3A CN109444042B (en) | 2018-12-26 | 2018-12-26 | Friction piece paste strength testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598929.3A CN109444042B (en) | 2018-12-26 | 2018-12-26 | Friction piece paste strength testing arrangement |
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| CN109444042A CN109444042A (en) | 2019-03-08 |
| CN109444042B true CN109444042B (en) | 2024-08-13 |
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| CN201811598929.3A Active CN109444042B (en) | 2018-12-26 | 2018-12-26 | Friction piece paste strength testing arrangement |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110595997A (en) * | 2019-09-27 | 2019-12-20 | 广东中烟工业有限责任公司 | Adhesive strength detection device for soft cigarette package hardening cigarette case and evaluation method for adhesive performance of soft cigarette package hardening cigarette case |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944485A (en) * | 2012-11-05 | 2013-02-27 | 北京瑞斯福科技有限公司 | Shearing strength testing device of powder metallurgy brake pad for high speed train |
| CN209280539U (en) * | 2018-12-26 | 2019-08-20 | 鑫精合激光科技发展（北京）有限公司 | A kind of friction sticking strength test device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6324916B1 (en) * | 1999-12-15 | 2001-12-04 | Ultradent Products, Inc. | Testing shear bond strength |
| JP2006275559A (en) * | 2005-03-28 | 2006-10-12 | Fuji Seiko Kk | Indentor for frictional abrasion test and frictional abrasion testing machine equipped with it |
| CN201724863U (en) * | 2010-06-02 | 2011-01-26 | 北京天宜上佳新材料有限公司 | Brake shoe back and friction piece bonding strength test fixture |
| CN105181309B (en) * | 2015-08-07 | 2017-12-26 | 贵州航瑞科技有限公司 | A kind of frock for measuring fastener shearing strength |
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2018
- 2018-12-26 CN CN201811598929.3A patent/CN109444042B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944485A (en) * | 2012-11-05 | 2013-02-27 | 北京瑞斯福科技有限公司 | Shearing strength testing device of powder metallurgy brake pad for high speed train |
| CN209280539U (en) * | 2018-12-26 | 2019-08-20 | 鑫精合激光科技发展（北京）有限公司 | A kind of friction sticking strength test device |
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