CN109975203B - Friction coefficient detection device - Google Patents
Friction coefficient detection device Download PDFInfo
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- CN109975203B CN109975203B CN201711464995.7A CN201711464995A CN109975203B CN 109975203 B CN109975203 B CN 109975203B CN 201711464995 A CN201711464995 A CN 201711464995A CN 109975203 B CN109975203 B CN 109975203B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention provides a friction coefficient detection device, which comprises friction heads arranged on the same axis and oppositely arranged, wherein a sample is arranged between the friction heads and is vertical to the axis; one end of the friction head is respectively arranged in the sleeve; a pressure sensor and a pressure adjusting assembly are further arranged in one of the sleeves; the pressure sensor is connected with the friction head; the test sample is connected with a clamp at one end of a tension arm of the universal tension detection machine. The device can realize the detection of the friction coefficient of a specific material sample under the conditions of different pressures, different pulling forces and different moving speeds, can comprehensively evaluate the performance of the material through the friction coefficient data under different conditions, and can also provide corresponding accurate guidance for the application of the material.
Description
Technical Field
The invention relates to a detection device, in particular to a friction coefficient detection device.
Background
With the development of economy and social progress, more and more precise control in production life is favored by people, and the situation is particularly obvious in industrial production. In the current industrial production, the precision control, the intelligent production, the unmanned operation and the like are mature day by day, and most of the high-precision technologies depend on the precise data base. Therefore, in modern industry, detection of materials, parameters of equipment, data, etc. is crucial and not negligible. The material has many and various parameters, and each parameter needs to be studied in depth.
The friction coefficient is an important factor influencing the stamping forming performance of the metal plate strip, and the lower the friction coefficient is, the better the stamping forming performance of the metal plate strip is, so the friction coefficient is an important input parameter for stamping process manufacturers. At present, the principle of measuring the metal friction coefficient by stamping technicians is shown in figure 1 and the following formula:
f＝F/(2*N)，
wherein F is the friction coefficient, F is the pulling force, N is the pressure exerted to the sample;
practice shows that the friction coefficient is changed along with the pressure N and the sliding speed V, and the influence of the pressure N and the sliding speed V on the detection result is not considered by the conventional friction coefficient measuring device, so that a device capable of measuring the friction coefficients under different pressures N and sliding speeds V is necessary.
Disclosure of Invention
Aiming at the defects of the prior art, the applicant designs a friction coefficient detection device; the device can realize the detection of the friction coefficient of a specific material sample under the conditions of different pressures, different pulling forces and different moving speeds, can comprehensively evaluate the performance of the material through the friction coefficient data under different conditions, and can also provide corresponding accurate guidance for the application of the material.
The purpose of the invention is realized by the following technical scheme:
the invention provides a friction coefficient detection device, which comprises friction heads arranged on the same axis and oppositely arranged, wherein a sample is arranged between the friction heads and is vertical to the axis;
one end of the friction head is respectively arranged in the sleeve;
a pressure sensor and a pressure adjusting assembly are further arranged in one of the sleeves; the pressure sensor is connected with the friction head;
the test sample is connected with a clamp at one end of a tension arm of the universal tension detection machine.
Preferably, the pressure regulating assembly comprises a spring arranged in the sleeve and a force application assembly penetrating through the bottom of the sleeve; and two ends of the spring are respectively connected with the friction head and the force application assembly.
Preferably, the force application assembly comprises a force application plate connected with the spring and a limiting mechanism used for adjusting the position of the force application plate; the edges of the force application plate are respectively connected with the inner wall of the sleeve.
Preferably, the limiting mechanism comprises a screw rod connected with the force application plate and penetrating through the bottom of the sleeve; the hole at the bottom of the sleeve for the screw rod to penetrate through is internally provided with an internal thread; the internal thread is matched with the external thread of the screw rod.
Preferably, the limiting mechanism comprises a connecting rod which is connected with the force application plate and penetrates through the bottom of the sleeve; the connecting rod is uniformly provided with a plurality of parallel slots; the end wall of the sleeve is provided with a bolt matched with the slot, and an inserted rod of the bolt is inserted into the slot when extending out.
Preferably, the slots are respectively arranged on the vertical diameter of the connecting rod:
the slots are respectively arranged at the upper end of the vertical diameter of the connecting rod, and a vertical bolt is arranged above the vertical diameter of the end wall;
the slots are respectively arranged at the lower ends of the vertical diameters of the connecting rods, and vertical bolts are arranged below the vertical diameters of the end walls;
the slots are respectively arranged at the upper end and the lower end of the vertical diameter of the connecting rod at intervals, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall;
the slots are respectively arranged at two ends of the vertical diameter of the connecting rod in a pairwise manner, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall.
Preferably, one end of the outer side of the spiral rod and one end of the outer side of the connecting rod are respectively connected with a rotating rod or a rotating wheel which is perpendicular to the spiral rod and the connecting rod.
Preferably, the transverse inner cross section of the sleeve is the same as the transverse cross section of the friction head; and the transverse section of the friction head is circular.
Preferably, the transverse inner cross section of the sleeve is the same as the transverse cross section of the friction head; and the transverse section of the friction head is polygonal.
Preferably, the two sleeves have the same external cross section in the coaxial and transverse directions.
Preferably, the sample is in the form of a rectangular plate strip.
Preferably, the outer end surface of the friction head is connected with the side wall of the friction head through a circular arc line.
Preferably, the clamp comprises an even number of jaws symmetrically arranged about the axis of the tension arm; the clamping heads are respectively connected with the lower ends of the tension arms in a rotating mode.
Preferably, the clamp comprises an even number of jaws symmetrically arranged about the axis of the tension arm; the clamping heads are respectively connected with the lower ends of the tension arms in a rotating mode.
Compared with the closest prior art, the invention has the beneficial effects that:
1. according to the technical scheme provided by the invention, the two coaxial friction heads in the two opposite sleeves can be used for applying pressure to the sample, the pressure adjusting assembly can be used for adjusting and controlling the pressure, and the indicated value of the pressure can be read by the pressure sensor; the tension and the moving speed of the sample can be adjusted by a universal tension tester; the two are mutually independent and are not limited; therefore, the friction coefficient of the specific material sample can be detected under the conditions of different pressures, different pulling forces and different moving speeds, the performance of the material can be comprehensively evaluated through the friction coefficient data under different conditions, and corresponding accurate guidance can be provided for the application of the material.
2. According to the technical scheme provided by the invention, the pressure of the friction head on the sample is adjusted through the spring and the limiting device, the limiting device adopts the spiral limiting of the spiral rod and the bolt limiting of the connecting rod respectively, and the two forms can accurately adjust the pressure. The spring not only can expand the range of the provided pressure value, but also can buffer the horizontal shaking of the friction head caused by the movement of the sample, thereby ensuring the accuracy of the detection result.
3. According to the technical scheme provided by the invention, the outer wall of the friction head is connected with the inner wall of the sleeve, so that the radial displacement of the friction head can be effectively prevented, and the stability and accuracy of a pressure value can be increased.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1: testing a schematic diagram of the friction coefficient;
FIG. 2: the structure diagram of the detection device provided by the invention;
reference numerals: 1-universal tensile testing machine, 2-testing table, 3-tensile arm, 4-clamp, 5-sample, 6-base, 7-first sleeve, 8-second sleeve, 9-first friction head, 10-second friction head, 11-pressure sensor, 12-spring, 13-force application plate, 14-screw rod and 15-rotating rod.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application.
Example 1
The invention provides a friction coefficient detection device, which comprises a base 6 connected with a test bed 2 of a universal tensile testing machine 1, and a first sleeve 7 and a second sleeve 8 which are respectively connected with the base 6 and have opposite openings;
a first friction head 9 is arranged in the first sleeve 7;
a second friction head 10, a pressure sensor 11 and a pressure adjusting assembly are sequentially arranged in the second sleeve 8 from the opening to the bottom;
the outer wall of the first friction head 9 is connected with the inner wall of the first sleeve 7, and the outer wall of the second friction head 10 is connected with the inner wall of the second sleeve 8;
the first friction head 9 and the second friction head 10 are coaxial; the gap between the first friction head 9 and the second friction head 10 is used for setting the test sample 5; the sample 5 is perpendicular to the axis of the friction head, and the sample 5 is connected with a clamp 4 at one end of a tension wall 3 of the universal tension tester 1.
The pressure adjusting assembly comprises a spring 12 arranged in the second sleeve 8 and a force application assembly penetrating through the bottom of the second sleeve 8; both ends of the spring 12 are connected to the second friction head 10 and the force application member, respectively.
The force application assembly comprises a force application plate 13 connected with the spring 12 and a limiting mechanism used for adjusting the position of the force application plate 13; the edges of the force application plate 13 are respectively connected with the inner wall of the second sleeve 8.
The limiting mechanism comprises a screw rod 14 which is connected with the force application plate 13 and penetrates through the bottom of the second sleeve 8; the hole on the bottom of the second sleeve 8 for the screw rod to pass through is internally threaded; the internal thread is matched with the external thread of the screw rod.
One end of the outer side of the spiral rod is connected with a rotating rod 15 or a rotating wheel which is vertical to the spiral rod.
The transverse inner section of the first sleeve 7 is the same as that of the first friction head 9, and the transverse inner section of the second sleeve 8 is the same as that of the second friction head 10; and the first and second friction heads 9 and 10 are circular in transverse cross-section.
The first sleeve 7 and the second sleeve 8 are coaxial and have the same transverse outer section; the inner cross-sectional area of the first sleeve 7 is smaller than the inner cross-sectional area of the second sleeve 8.
The sample 5 is in the form of a rectangular plate strip.
The outer end faces of the first friction head 9 and the second friction head 10 are connected with the side walls of the first friction head and the second friction head through arc lines.
The clamp 4 comprises an even number of chucks symmetrically arranged about the axis of the tension arm; the clamping heads are respectively connected with the lower ends of the tension arms in a rotating mode.
Example 2
The invention provides a friction coefficient detection device, which comprises a base 6 connected with a test bed 2 of a universal tensile testing machine 1, and a first sleeve 7 and a second sleeve 8 which are respectively connected with the base 6 and have opposite openings;
a first friction head 9 is arranged in the first sleeve 7;
a second friction head 10, a pressure sensor 11 and a pressure adjusting assembly are sequentially arranged in the second sleeve 8 from the opening to the bottom;
the outer wall of the first friction head 9 is connected with the inner wall of the first sleeve 7, and the outer wall of the second friction head 10 is connected with the inner wall of the second sleeve 8;
the first friction head 9 and the second friction head 10 are coaxial; the gap between the first friction head 9 and the second friction head 10 is used for setting the test sample 5; the sample 5 is perpendicular to the axis of the friction head, and the sample 5 is connected with a clamp 4 at one end of a tension wall 3 of the universal tension tester 1.
The pressure adjusting assembly comprises a spring 12 arranged in the second sleeve 8 and a force application assembly penetrating through the bottom of the second sleeve 8; both ends of the spring 12 are connected to the second friction head 10 and the force application member, respectively.
The force application assembly comprises a force application plate 13 connected with the spring 12 and a limiting mechanism used for adjusting the position of the force application plate 13; the edges of the force application plate 13 are respectively connected with the inner wall of the second sleeve 8.
The limiting mechanism comprises a connecting rod which is connected with the force application plate 13 and penetrates through the bottom of the second sleeve 8; the connecting rod is uniformly provided with a plurality of parallel slots; a plug pin matched with the slot is arranged on the end wall of the sleeve, and a plug rod of the plug pin is inserted into the slot when extending out; the connecting rod is pushed inwards or pulled outwards to increase or decrease the pressure value, and meanwhile, the bolt is inserted into the slot to position the connecting rod so as to realize the pressure keeping; for the distance between the slots adjacent in the axial direction, the larger the distance, the more sensitive the pressure adjustment.
The slots are respectively arranged on the vertical diameter of the connecting rod, and the positions of the slots can be designed in the following modes:
1) the slots are respectively arranged at the upper end of the vertical diameter of the connecting rod, and a vertical bolt is arranged above the vertical diameter of the end wall;
2) the slots are respectively arranged at the lower ends of the vertical diameters of the connecting rods, and vertical bolts are arranged below the vertical diameters of the end walls;
3) the slots are respectively arranged at the upper end and the lower end of the vertical diameter of the connecting rod at intervals, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall;
4) the slots are respectively arranged at two ends of the vertical diameter of the connecting rod in a pairwise manner, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall.
One end of the outer side of the connecting rod is respectively connected with a rotating rod or a rotating wheel which is vertical to the connecting rod.
The transverse inner section of the first sleeve 7 is the same as that of the first friction head 9, and the transverse inner section of the second sleeve 8 is the same as that of the second friction head 10; and the transverse cross-sections of the first friction head 9 and the second friction head 10 are circular or polygonal.
The first sleeve 7 and the second sleeve 8 are coaxial and have the same transverse outer section; the inner cross-sectional area of the first sleeve 7 is smaller than the inner cross-sectional area of the second sleeve 8.
The sample 5 to be detected is in the shape of a rectangular plate strip.
The outer end faces of the first friction head 9 and the second friction head 10 are connected with the side walls of the first friction head and the second friction head through arc lines.
The clamp 4 comprises an even number of chucks symmetrically arranged about the axis of the tension arm; the clamping heads are respectively connected with the lower ends of the tension arms in a rotating mode.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
Claims (8)
1. A friction coefficient detection device comprises friction heads which are oppositely arranged on the same axis, and a sample is arranged between the friction heads and is vertical to the axis;
one end of the friction head is respectively arranged in the sleeve;
one sleeve is internally provided with a pressure sensor and a pressure adjusting component; the pressure sensor is connected with the friction head;
the test sample is connected with a clamp at one end of a tension arm of the universal tension detector;
the pressure adjusting assembly comprises a spring arranged in the sleeve and a force application assembly penetrating through the bottom of the sleeve; the two ends of the spring are respectively connected with the friction head and the force application assembly;
the force application assembly comprises a force application plate connected with the spring and a limiting mechanism used for adjusting the position of the force application plate; the edges of the force application plate are respectively connected with the inner wall of the sleeve;
the limiting mechanism comprises a screw rod which is connected with the force application plate and penetrates through the bottom of the sleeve; the hole at the bottom of the sleeve for the screw rod to penetrate through is internally provided with an internal thread; the internal thread is matched with the external thread of the screw rod;
the limiting mechanism comprises a connecting rod which is connected with the force application plate and penetrates through the bottom of the sleeve; the connecting rod is uniformly provided with a plurality of parallel slots; a plug pin matched with the slot is arranged on the end wall of the sleeve, and a plug rod of the plug pin is inserted into the slot when extending out;
the slots are respectively arranged on the vertical diameter of the connecting rod:
the slots are respectively arranged at the upper end of the vertical diameter of the connecting rod, and a vertical bolt is arranged above the vertical diameter of the end wall;
the slots are respectively arranged at the lower ends of the vertical diameters of the connecting rods, and vertical bolts are arranged below the vertical diameters of the end walls;
the slots are respectively arranged at the upper end and the lower end of the vertical diameter of the connecting rod at intervals, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall;
the slots are respectively arranged at two ends of the vertical diameter of the connecting rod in a pairwise manner, and vertical bolts are respectively arranged above and below the vertical diameter of the end wall.
2. The device for detecting the friction coefficient according to claim 1, wherein one end of the outer side of the spiral rod and one end of the connecting rod are respectively connected with a rotating rod or a rotating wheel perpendicular to the spiral rod and the connecting rod.
3. A device as claimed in claim 1, wherein the sleeve has a transverse inner cross-section which is the same as the transverse cross-section of the friction head; and the transverse section of the friction head is circular.
4. A device as claimed in claim 1, wherein the sleeve has a transverse inner cross-section which is the same as the transverse cross-section of the friction head; and the transverse section of the friction head is polygonal.
5. A device as claimed in claim 1, wherein the two sleeves have the same external cross-section in the coaxial and transverse directions.
6. The apparatus of claim 1, wherein the sample is in the form of a rectangular plate strip.
7. The device for detecting the friction coefficient as claimed in claim 1, wherein the outer end surface of the friction head is connected with the side wall thereof by a circular arc line.
8. The device for detecting the friction coefficient according to claim 1, wherein the clamp comprises an even number of chucks symmetrically arranged about the axis of the tension arm; the clamping heads are respectively connected with the lower ends of the tension arms in a rotating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464995.7A CN109975203B (en) | 2017-12-28 | 2017-12-28 | Friction coefficient detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464995.7A CN109975203B (en) | 2017-12-28 | 2017-12-28 | Friction coefficient detection device |
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| Publication Number | Publication Date |
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| CN109975203A CN109975203A (en) | 2019-07-05 |
| CN109975203B true CN109975203B (en) | 2022-03-18 |
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| CN201711464995.7A Active CN109975203B (en) | 2017-12-28 | 2017-12-28 | Friction coefficient detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112881279B (en) * | 2021-01-12 | 2022-09-20 | 中铝材料应用研究院有限公司 | Plate friction coefficient testing device and method |
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| CN1815172A (en) * | 2006-02-21 | 2006-08-09 | 中国建筑材料科学研究院 | Friction-wear detecting apparatus |
| CN101975745A (en) * | 2010-10-28 | 2011-02-16 | 哈尔滨工业大学 | Metal foil plate micro-forming friction factor testing device |
| KR20120011285A (en) * | 2010-07-28 | 2012-02-07 | 현대제철 주식회사 | Apparatus for measuring friction factor of a steel sheet |
| CN202383059U (en) * | 2011-12-31 | 2012-08-15 | 重庆机电职业技术学院 | Detection device for frictional coefficient of metal material |
| CN104359831A (en) * | 2014-11-12 | 2015-02-18 | 重庆科技学院 | Heat friction performance test bed of metal materials |
| CN205941312U (en) * | 2016-08-08 | 2017-02-08 | 中山市鸿勋机械有限公司 | Friction coefficient test appearance |
| CN107271306A (en) * | 2017-07-27 | 2017-10-20 | 西南科技大学 | It is a kind of to carry drawing, the friction-wear detecting apparatus of press mechanism and method of testing |
-
2017
- 2017-12-28 CN CN201711464995.7A patent/CN109975203B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815172A (en) * | 2006-02-21 | 2006-08-09 | 中国建筑材料科学研究院 | Friction-wear detecting apparatus |
| KR20120011285A (en) * | 2010-07-28 | 2012-02-07 | 현대제철 주식회사 | Apparatus for measuring friction factor of a steel sheet |
| CN101975745A (en) * | 2010-10-28 | 2011-02-16 | 哈尔滨工业大学 | Metal foil plate micro-forming friction factor testing device |
| CN202383059U (en) * | 2011-12-31 | 2012-08-15 | 重庆机电职业技术学院 | Detection device for frictional coefficient of metal material |
| CN104359831A (en) * | 2014-11-12 | 2015-02-18 | 重庆科技学院 | Heat friction performance test bed of metal materials |
| CN205941312U (en) * | 2016-08-08 | 2017-02-08 | 中山市鸿勋机械有限公司 | Friction coefficient test appearance |
| CN107271306A (en) * | 2017-07-27 | 2017-10-20 | 西南科技大学 | It is a kind of to carry drawing, the friction-wear detecting apparatus of press mechanism and method of testing |
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