CN1246685C - Friction coefficient measuring system - Google Patents
Friction coefficient measuring system Download PDFInfo
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- CN1246685C CN1246685C CN 200410016425 CN200410016425A CN1246685C CN 1246685 C CN1246685 C CN 1246685C CN 200410016425 CN200410016425 CN 200410016425 CN 200410016425 A CN200410016425 A CN 200410016425A CN 1246685 C CN1246685 C CN 1246685C
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- pressure sensor
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- 239000000523 sample Substances 0.000 claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000002788 crimping Methods 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 238000007652 sheet-forming process Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention relates to a friction coefficient measuring system which belongs to the field of material processing. In the present invention, a total draw force sensor is arranged on a main shaft of a sheet material drawing machine through screw threads; a probe type combination pressure sensor is fixed on a mould workpiece through screws; a displacement sensor is fixed between an upper mould and a lower mould through a magnet; a crimping force sensor is arranged on a top plate of the sheet material drawing machine to press the workpiece; a bridge box, a dynamic strainometer and an industrial control computer are mutually connected through data lines; the total draw force sensor, the probe type combination pressure sensor, the displacement sensor, the crimping force sensor and the bridge box are connected through data lines. Voltage signals are generated and connected to the input end of the dynamic strainometer through the data lines; the output end of the dynamic strainometer is connected to an A/D collecting card through a data line; the output end of the A/D collecting card is connected with the industrial control computer. The present invention has the advantages of favorable collecting effect, high sensitivity, few sensor elements, small volume, low price and wide application range, and is especially suitable for occasions for researching friction in a sheet material draw forming technique.
Description
Technical field
The present invention relates to a kind of measuring system of friction factor, particularly a kind of energy measurement goes out in the drawing and forming process the real-time friction coefficient measurement system of different parts on the plate.Belong to the mechanical detection technical field.
Background technology
In the middle of materials processing scientific research and engineering application, usually need to measure the real-time friction factor size on the workpiece in the sheet forming process, study the quality of friction profile rule, evaluation lubricant with this, especially in the process of sheet forming process, friction factor is one of important parameter that influences the sheet forming performance.
Just begin one's study from the sixties both at home and abroad and invent the pilot system of various mensuration friction factor.Find by retrieval, Chinese patent title: measuring friction coefficient device, publication number: 2221211, this patent disclosure a kind of measuring system of measuring friction factor in plastics, the rubber extruded process, it is a kind of device based on mechanical means test bulk granular material friction factor.But it invents down at the certain material processing mode, adaptability is very limited, in the time of can not adapting to research sheet metal deep drawing technology not only needs measure the kinetic friction coefficient of a plurality of difference location on the plate simultaneously, and need that work space is less, the occasion of compact conformation.In further retrieving, find identical with theme of the present invention or similar bibliographical information as yet.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency in the current drawing and forming technology background technology, a kind of friction coefficient measurement system is provided, make it can measure in the drawing and forming process the real-time friction factor size of different measuring point on the plate, measure the friction factor size in real time, exactly and estimate the friction, lubrication situation.
The present invention is achieved by the following technical solutions, the present invention includes: total drawing pressure sensor, probe-type combination pressure sensor, displacement transducer, pressure-pad-force sensor, bridge box, dynamic strain indicator, A/D capture card and industrial computer.The present invention has adopted total drawing pressure sensor to measure total drawing pressure, probe-type combination pressure sensor and has measured positive force and tangential force, the displacement transducer of spatial point on the plate and come Displacement Measurement, pressure-pad-force sensor to measure pressure-pad-force.Concrete annexation is: total drawing pressure sensor is arranged on the main shaft of sheet metal deep drawing machine by screw thread, probe-type combination pressure sensor is fixed on the mould by screw, displacement transducer is fixed in up and down between the mould by magnet, and the pressure-pad-force sensor is arranged on the top board of sheet metal deep drawing machine and pushes down workpiece.Connect by data line between total drawing pressure sensor, probe-type combination pressure sensor, displacement transducer, pressure-pad-force sensor and the bridge box, bridge box, dynamic strain indicator, industrial computer connect with data line between mutually, and are arranged on the worktable on sheet metal deep drawing machine limit.The signal that measures connects with bridge box by data line and forms bridge circuit, 0～10V voltage signal of generation standard is connected to the input end of dynamic strain indicator by data line, through the dynamic strain indicator balance, after the amplification, output terminal by dynamic strain indicator is connected to the A/D capture card by data line, by the A/D capture card electric signal that collects is carried out importing industrial computer behind the sample quantization, record institute's measuring point place positive force size and tangential force size by the multi-channel signal acquiring testing software, thereby calculate the real-time friction factor size of this measurement point in real time, and show total drawing pressure, positive force and tangential force, displacement curve and data.
The probe-type combination sensor comprises: probe, tangential force semi-girder elastic body, ball, pretension bolt, positive force semi-girder elastic body, its annexation is: probe contacts by ball point with positive force semi-girder elastic body after passing tangential force semi-girder elastic body, ball and pretension bolt relative fixed are in positive force semi-girder elastic body, in die workpiece, positive force semi-girder elastic body is fixed on the die workpiece by screw tangential force semi-girder elastic body by probe and pretension bolt relative fixed.During use, probe contacts with measurement point, tangential force is passed to tangential force semi-girder elastic body, positive force passes to positive force semi-girder elastic body, on positive force semi-girder elastic body and tangential force semi-girder elastic body, all post the adhesive type strain ga(u)ge, according to the micro-deformation output electric signal that the semi-girder elastic body produces, measure positive force and tangential force respectively, and then calculate the friction factor of this measurement point.Ball can be eliminated the influence of the directivity of power when measuring, the accuracy when being used to guarantee to measure.Pretension bolt is used to regulate the pretightning force when measuring, and can adjust the sensitivity of probe.
The present invention adopts small-sized probe to transmit deformation, and the head dimensions of probe is smaller or equal to 3mm, with the contact area of plate less than 10mm
2, on a face, can arrange a plurality of measurement points.Because the contact area of sensor is less, can arrange a plurality of sensors on demand arbitrarily, thereby the purpose of realization plate different parts friction factor distribution measuring has been settled six sensors altogether.Specific embodiments can be carried out flexible arrangement according to the characteristics of workpiece and mould, as square, rectangle, polygon or the like.
The present invention has adopted probe-type combination pressure sensor, uses positive force semi-girder elastic body and tangential force semi-girder elastic body, measures positive force and tangential force simultaneously, and calculates friction factor thus.The present invention can be captured in the drawing and forming process spatial point friction factor size on the plate in real time, thereby the friction factor that obtains on the plate distributes.And show total drawing pressure, positive force and tangential force, displacement curve and data.
Characteristics of the present invention are that collection effect is good, and it is highly sensitive, antijamming capability is strong, sensor element is few, volume is little, low price, and is applied widely, are specially adapted to the occasion of research friction in the process of sheet forming technology.The present invention has obtained good application in real process of sheet forming research.Practice shows: result of use is good, and the measuring accuracy height is economical convenient and practical.
Description of drawings
Fig. 1 structural representation of the present invention
The die upper sensor is arranged synoptic diagram during Fig. 2 pull and stretch cylindrical element
Fig. 3 probe-type combination sensor synoptic diagram
Embodiment
As shown in Figure 1 and Figure 2, the present invention includes: total drawing pressure sensor 1, probe-type combination pressure sensor 2, displacement transducer 3, pressure-pad-force sensor 4, bridge box 5, dynamic strain indicator 6, A/D capture card 7 and industrial computer 8.Its connected mode is: total drawing pressure sensor 1 is arranged on the main shaft of sheet metal deep drawing machine by screw thread, probe-type combination pressure sensor 2 is fixed on the die workpiece by screw, displacement transducer 3 is fixed in up and down between the mould by magnet, pressure-pad-force sensor 4 is located on the top board of sheet metal deep drawing machine and pushes down workpiece, bridge box 5, dynamic strain indicator 6, industrial computer 8 connects with data line between mutually, and be located on the worktable on sheet metal deep drawing machine limit, total drawing pressure sensor 1, probe-type combination pressure sensor 2, displacement transducer 3, connect by data line between pressure-pad-force sensor 4 and the bridge box 5,0～10V voltage signal of generation standard is connected to the input end of dynamic strain indicator 6 by data line, the output terminal of dynamic strain indicator 6 is connected to A/D capture card 7 by data line, and A/D capture card output terminal is connected with industrial computer 8.
Six combined type probe sensors 2 are distributed on the cylindrical element pull and stretch die, in order to positive force and the tangential force of measuring spatial point on the plate, and form bridge circuit with the electric bridge box, provide power supply that resistance variations is converted into change in voltage by dynamic strain indicator 6, through the dynamic strain indicator balance, amplify, by A/D capture card 7 electric signal that collects is carried out sample quantization, record institute's measuring point place positive force size and tangential force size by the multi-channel signal acquiring testing software, thereby calculate the real-time friction factor size of this measurement point in real time, and show total drawing pressure, positive force and tangential force, displacement curve and data.
As shown in Figure 3, probe-type combination sensor 2 comprises: probe 9, tangential force semi-girder elastic body 10, ball 11, pretension bolt, positive force semi-girder elastic body, its annexation is: probe 9 passes tangential force semi-girder elastic body 10 backs and contacts by 11 on ball with positive force semi-girder elastic body 13, ball 11 and pretension bolt 12 relative fixed are in positive force semi-girder elastic body 13, in die workpiece, positive force semi-girder elastic body 13 is fixed on the die workpiece by screw by probe 9 and pretension bolt 12 relative fixed for tangential force semi-girder elastic body 10.
Adopt small-sized probe to transmit deformation, the head dimensions of probe 9 is smaller or equal to 3mm, with the contact area of plate less than 10mm
2, on a face, arrange a plurality of measurement points.
Claims (2)
1, a kind of friction coefficient measurement system, comprise: total drawing pressure sensor (1), displacement transducer (3), pressure-pad-force sensor (4), bridge box (5), dynamic strain indicator (6), A/D capture card (7) and industrial computer (8), it is characterized in that, also comprise: probe-type combination pressure sensor (2), total drawing pressure sensor (1) is arranged on the main shaft of sheet metal deep drawing machine by screw thread, probe-type combination pressure sensor (2) is fixed on the die workpiece by screw, displacement transducer (3) is fixed in up and down between the mould by magnet, pressure-pad-force sensor (4) is located on the top board of sheet metal deep drawing machine and pushes down workpiece, bridge box (5), dynamic strain indicator (6), connect with data line between industrial computer (8) is mutual, and be located on the worktable on sheet metal deep drawing machine limit, total drawing pressure sensor (1), probe-type combination pressure sensor (2), displacement transducer (3), connect by data line between pressure-pad-force sensor (4) and the bridge box (5), 0～10V voltage signal of generation standard is connected to the input end of dynamic strain indicator (6) by data line, the output terminal of dynamic strain indicator (6) is connected to A/D capture card (7) by data line, A/D capture card output terminal is connected with industrial computer (8)
Probe-type combination sensor (2) comprising: probe (9), tangential force semi-girder elastic body (10), ball (11), pretension bolt (12), positive force semi-girder elastic body (13), its annexation is: probe (9) passes tangential force semi-girder elastic body (10) back and contacts by ball (11) point with positive force semi-girder elastic body (13), ball (11) and pretension bolt (12) relative fixed are in positive force semi-girder elastic body (13), in die workpiece, positive force semi-girder elastic body (13) is fixed on the die workpiece by screw tangential force semi-girder elastic body (10) by probe (9) and pretension bolt (12) relative fixed.
2, friction coefficient measurement according to claim 1 system is characterized in that, adopts small-sized probe to transmit deformation, and the head dimensions of probe (9) is smaller or equal to 3mm, with the contact area of plate less than 10mm
2, on a face, arrange a plurality of measurement points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016425 CN1246685C (en) | 2004-02-19 | 2004-02-19 | Friction coefficient measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016425 CN1246685C (en) | 2004-02-19 | 2004-02-19 | Friction coefficient measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN1560595A CN1560595A (en) | 2005-01-05 |
| CN1246685C true CN1246685C (en) | 2006-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410016425 Expired - Lifetime CN1246685C (en) | 2004-02-19 | 2004-02-19 | Friction coefficient measuring system |
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| Country | Link |
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| CN (1) | CN1246685C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052539A (en) * | 2019-04-24 | 2019-07-26 | 首钢集团有限公司 | One kind is for lubricant lubricant effect evaluation method in Sheet Metal Forming Technology |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014106B (en) * | 2015-07-29 | 2018-03-23 | 华北电力大学（保定） | It is a kind of to measure lathe tool minor flank and the device of part machined surface frictional behavior |
| CN108593541B (en) * | 2018-03-22 | 2021-01-05 | 深圳大学 | Friction device induced by external electric field and testing method thereof |
| CN116659720A (en) * | 2023-04-11 | 2023-08-29 | 成都飞机工业（集团）有限责任公司 | Aircraft harness pulling-out force calculation method |
-
2004
- 2004-02-19 CN CN 200410016425 patent/CN1246685C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052539A (en) * | 2019-04-24 | 2019-07-26 | 首钢集团有限公司 | One kind is for lubricant lubricant effect evaluation method in Sheet Metal Forming Technology |
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| Publication number | Publication date |
|---|---|
| CN1560595A (en) | 2005-01-05 |
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Owner name: JIANGSU PACIFIC PRECISION FORGING TECHNOLOGY CO., Free format text: FORMER OWNER: SHANGHAI JIAO TONG UNIVERSITY Effective date: 20100916 |
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Granted publication date: 20060322 |