CN201096560Y - Stamping die dynamic stress strain measurement device - Google Patents
Stamping die dynamic stress strain measurement device Download PDFInfo
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- CN201096560Y CN201096560Y CNU2007200762000U CN200720076200U CN201096560Y CN 201096560 Y CN201096560 Y CN 201096560Y CN U2007200762000 U CNU2007200762000 U CN U2007200762000U CN 200720076200 U CN200720076200 U CN 200720076200U CN 201096560 Y CN201096560 Y CN 201096560Y
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Abstract
Disclosed is a punching mould dynamic stress-strain measuring device in the measuring technique technical field, which comprises strain rosettes, resistor strain gages, bridge boxes, a dynamic strain meter, a displacement sensor, an industrial computer and a flat plate; the strain rosettes are adhered on the measured part of the punching mould; the resistor strain gages are adhered on the flat plate which is arranged close to the measured punching mould; each strain rosette comprises three axial strain gages; each of the strain gage is corresponding to each of the resistor strain gage; each of the strain gage is connected with a bridge box through the single bridge mode; each bridge box is connected with a strain measuring channel of the dynamic strain meter; the dynamic strain meter and the displacement sensor are respectively connected with a data acquisition card arranged in the industrial computer; the probe part of the displacement sensor is fixed on the punch of the measured punching mould and the fixing end of the displacement sensor is fixed on the concave punch of the measured punching mould. The punching mould dynamic stress-strain measuring device has the advantages of convenient adhesion, high measuring accuracy, rapid dynamic response and high automation level.
Description
Technical field
The utility model relates to a kind of device of field of measuring technique, specifically is a kind of diel dynamic stress strain gauge means.
Background technology
The light-weighted requirement of automobile makes the strength grade of automotive sheet more and more higher, and AHSS and ultra-high strength steel are applied to the vehicle body manufacturing more and more.Ultralight steel car body project is in order to alleviate car body weight and to improve the body construction performance, and AHSS and ultra-high strength steel consumption surpass 90%.Than traditional mild carbon steel, the required shaping load of high-strength steel sheet punching press improves 1～2 times, and the Problem of Failure of high-strength steel stamping mould becomes outstanding.For intensity, the rigidity of checking the high-strength steel stamping mould, predict the diel life-span and optimize the diel structure, need the device of the ess-strain of a kind of kinetic measurement diel in forming process.
Find by prior art documents, the distributed force that is subjected on mentioning with pressure film (original text is expressed as pressure film) measurement diel blank holder in the literary composition " Elastic deflections of the blank holder in deep drawing of sheet metal " on 34～40 pages of " Journal of MaterialsProcessing Technology " (material forming technology journal) 59 phases in 1996 such as L.Shulkin (plate deep drawing be shaped in the elastic deformation of blank holder), but require plate not have relative slip when measuring with mould with the method, blank deformation in the actual punching course, blank slides at die surface, so can't use this method to measure the dynamic stress of diel in the punching course, strain.
The utility model content
The utility model is at above-mentioned the problems of the prior art, a kind of diel dynamic stress strain gauge means is provided, make it gather the ess-strain of mould in dynamic punching course by strain rosette, and at the ess-strain that shows in real time on the industrial computer screen in the diel, foil gauge is pasted conveniently simultaneously, and measuring accuracy is higher.
The utility model is achieved through the following technical solutions, the utility model comprises: strain rosette, resistance strain plate, electric bridge box, dynamic strain indicator, displacement transducer, industrial computer, flat board, wherein: strain rosette sticks on the position to be measured of measured diel, resistance strain plate sticks on the flat board, and flat board is positioned near the measured diel.Strain rosette comprises the triaxial strain sheet, each axial strain sheet and a resistance strain plate of strain rosette connect one to one, and be connected to an electric bridge box in single bridge mode, an electric bridge box links to each other with a strain measurement passage of dynamic strain indicator, dynamic strain indicator and displacement transducer link to each other with data collecting card in the industrial computer respectively, the probe portion of displacement transducer is fixed on the punch of measured diel, and the stiff end of displacement transducer is fixed on the die of measured diel.
Described flat board is identical with measured diel material and be not subjected to the external force effect.
Each axial strain sheet specification of described resistance strain plate and strain rosette is identical, is responsible for strain rosette is carried out temperature compensation.
Described displacement transducer, the responsible stroke of surveying punch in the punching course.
Described dynamic strain indicator, has the analog quantity lead-out terminal, the analog quantity lead-out terminal links to each other with the analog input channel of data collecting card, and dynamic strain indicator converts the strain that records to voltage signal output, this voltage signal is inserted the analog quantity voltage input channel of data collecting card.
Its inner data collecting card of described Industrial Computer Control according to preset program work, is realized measurement, storage and the demonstration of the strain of diel punching course dynamic stress.
Can select data collecting card analog acquisition port number on number, dynamic strain indicator autonomous channel number and the industrial computer of number, electric bridge box of strain rosette according to the number of point to be measured in the diel.
During the utility model work, the stressed complexity of diel, usually be under the complex stress strain regime, strain rosette is firmly sticked on the diel position to be measured, three axial strain sheets of strain rosette can be measured the strain value of three different directions in position to be measured, try to achieve the stress-strain state of this measuring point according to generalized Hooke's law, the punch travel that cooperates displacement transducer to record, ess-strain on the mould in the punching course and press depth can be connected, each axial strain sheet of strain rosette and a resistance strain plate are connected to an electric bridge box in single bridge mode, constitute a strain measurement circuit, resistance strain plate sticks on and is positioned near the measured diel, identical with measured diel material, be not subjected on the one flat plate of external force effect, play temperature compensation function, an electric bridge box is connected to a strain measurement passage of dynamic strain indicator, dynamic strain indicator is the strain measurement circuit supply, and measurement strain measurement circuit voltage changes, the strain measurement circuit voltage changes with diel measured position strain the relation of determining, utilize this relation, can obtain the strain of the direction in the measured position of diel, and be converted to the analog quantity voltage signal of dynamic strain indicator output channel, input channel with the data collecting card in this analog quantity voltage signal access industrial computing machine, its inner data collecting card of Industrial Computer Control, according to preset program work, realize the measurement of diel punching course dynamic stress strain, computing, store, and the ess-strain of the measured point of diel is presented on the output display unit of industrial computer in patterned mode in real time with the punch travel variation.
Compared with prior art, the utlity model has following beneficial effect: adopt the ess-strain of the utility model measurement device diel in the Box-Shaped Drawing process, measurement is convenient, response is fast, and the highest sampling rate can reach the 250K bits per second, and the automatization level height.Ess-strain in the diel shows in real time that on the industrial computer screen help punching course is monitored in real time, the data that are stored on the industrial computer also are convenient to follow-up analysis and research.
Description of drawings
Fig. 1 the utility model apparatus structure synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated: present embodiment is being to implement under the prerequisite with technical solutions of the utility model; provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment is used for the ess-strain of a hyperbolic bottom surface of kinetic measurement Box-Shaped Drawing mould on Box-Shaped Drawing process punch 8, die 10, blank holder 9.In the present embodiment, select position to be measured, a place on the punch 8, be positioned at punch 8 fillet positions, select measuring point, two places on the die 10, be positioned at die 10 inlet fillet positions, select measuring point, two places on the blank holder 9, be positioned at blank holder binder surface middle part, these positions are stressed abominable positions of mould in the Box-Shaped Drawing forming process, and strain rosette is pasted for convenience, has offered shallow slot in the measuring point of choosing, five places.
Present embodiment comprises: strain rosette 1, resistance strain plate 2, electric bridge box 3, dynamic strain indicator 4, industrial computer 5, displacement transducer 6, dull and stereotyped 7, wherein: strain rosette 1 sticks on the position to be measured of measured diel, resistance strain plate 2 sticks on flat board 7, and dull and stereotyped 7 are positioned near the measured diel.Strain rosette 1 comprises the triaxial strain sheet, each axial strain sheet and a resistance strain plate 2 of strain rosette 1 connect one to one, and be connected to an electric bridge box 3 in single bridge mode, the strain measurement circuit of forming the direction in a position to be measured of measured diel, an electric bridge box 3 links to each other with a strain measurement passage of dynamic strain indicator 4, dynamic strain indicator 4 and displacement transducer 6 link to each other with data collecting card in the industrial computer 5 respectively, the probe portion of displacement transducer 6 is fixed on the punch 8 of measured diel, and the stiff end of displacement transducer 6 is fixed on the die 10 of measured diel.
Described dull and stereotyped 7 is identical with measured diel material and be not subjected to the external force effect.
Described strain rosette 1, it is five, five measurement points of while dynamic acquisition, stress, the strain of 3 directions of each measurement point, one of them strain rosette sticks in the shallow slot at punch 8 fillet positions, two other strain rosette sticks in the shallow slot at die 10 inlet fillet positions, and latter two strain rosette sticks in the shallow slot at blank holder 9 binder surfaces middle part.
Described strain rosette 1, three foil gauges of each strain rosette 1 link to each other respectively with three electric bridge boxes, a strain measurement passage of each electric box bridge 3 and dynamic strain indicator 4 links to each other, acquisition channel of the output channel of each dynamic strain indicator 4 and data collecting card, so, present embodiment adopts 15 electric bridge boxes, the data collecting card of four dynamic strain indicators, 16 bit ports.
Described resistance strain plate 2 is identical with strain rosette 1 each axial strain sheet specification, is responsible for strain rosette 1 is carried out temperature compensation.
Described dynamic strain indicator 4 is YD-28A type dynamic resistance strain instrument, and every dynamic resistance strain instrument has four autonomous channels.
Described dynamic strain indicator 4, has the analog quantity lead-out terminal, the analog quantity lead-out terminal links to each other with the analog input channel of data collecting card, and dynamic strain indicator 4 converts the strain that records to voltage signal output, this voltage signal is inserted the analog quantity voltage input channel of data collecting card.
Described data collecting card, for grinding the PCI1716 multifunctional data acquisition card of China, single ended mode has 16 analog/digital conversion passages, 16 of analog/digital conversion precision, plate carries first in first out buffer memory 4K, the highest sampling rate 250K bps, 15 passages in 16 passages of data collecting card insert the ess-strain information of 15 output channel outputs of dynamic strain indicator, the output signal of the remaining passage access digit displacement sensor 6 of data collecting card, record pull and stretch punch 8 strokes are mapped the ess-strain on the mould and the Box-Shaped Drawing degree of depth.
Described displacement transducer 6, the responsible stroke of surveying punch 8 in the punching course.
During the course of work of present embodiment, at first start dynamic strain indicator 4 and reset, dynamic strain indicator 4 begins to the strain measurement circuit supply of being made up of strain rosette 1, resistance strain plate 2 and electric bridge box 3 and detects strain measurement circuit bridge voltage; Start industrial computer 5 then, 5 pairs of data collecting cards mounted thereto of industrial computer are provided with, making data collecting card can be digital signal with the analog quantity voltage conversion of signals of each passage according to the frequency of setting, these analog quantity voltage signals are respectively from dynamic strain indicator 4 and displacement transducer 6, the voltage signal of dynamic strain indicator 4 has reflected the strain information of diel detected part, and the voltage signal of displacement transducer 6 has reflected diel punch 8 strokes; Secondly the starting pressure machine carries out Box-Shaped Drawing, in the Box-Shaped Drawing process, the punch 8 of diel, die 10 and blank holder 9 are subjected to loading to produce distortion, stick on punch 8, strain rosette 1 on die 10 and the blank holder 9 is along with they together are out of shape, the distortion of strain rosette 1 has comprised the influence of variation of ambient temperature, and resistance strain plate 2 can play the influence of eliminating variation of ambient temperature, the distortion of strain rosette 1 and resistance strain plate 2 causes strain measurement circuit bridge voltage to change, bridge voltage is detected and converts to the analog quantity voltage signal by dynamic strainmeter 4 and delivers to data collecting card on the industrial computer 5, in the Box-Shaped Drawing process, the displacement transducer 6 that is installed on the mould structure is the analog quantity voltage signal with the punch displacement conversion of signals, deliver to the data collecting card on the industrial computer 5 in the lump, after the signal that industrial computer 5 collects data collecting card passes through calculation process, the ess-strain of the measured point of diel is presented on the output display unit of industrial computer 5 in patterned mode in real time with the variation of punch 8 strokes, stores stand-by simultaneously; After Box-Shaped Drawing is finished, 8 backhauls of punching press punch, blank holder lifts; End industrial computer 5 at last, obtained in the diel some ess-strains in whole punching course with the change curve of pull and stretch stroke.
Compared with prior art, present embodiment has following beneficial effect: present embodiment will be equipped with the industrial computer 5 of high speed, hyperchannel, high-accuracy data collection card and introduce wherein, adopt the high-speed data acquisition card of 16 in one 16 passage, the complex stress strain regime of 5 measuring points in the dynamic acquisition diel simultaneously at most, the highest sampling rate can reach the 250K bits per second, and the present embodiment foil gauge is pasted convenient, and dynamic response is fast, the automatization level height.
Claims (7)
1, a kind of diel dynamic stress strain gauge means, comprise: strain rosette, industrial computer, it is characterized in that, also comprise: resistance strain plate, the electric bridge box, dynamic strain indicator, displacement transducer, dull and stereotyped, strain rosette sticks on the position to be measured of measured diel, resistance strain plate sticks on the flat board, strain rosette comprises the triaxial strain sheet, each axial strain sheet and a resistance strain plate of strain rosette connect one to one, and be connected to an electric bridge box in single bridge mode, the electric bridge box links to each other with a strain measurement passage of dynamic strain indicator, dynamic strain indicator and displacement transducer link to each other with data collecting card in the industrial computer respectively, the probe portion of displacement transducer is fixed on the punch of measured diel, and the stiff end of displacement transducer is fixed on the die of measured diel.
2, diel dynamic stress strain gauge means according to claim 1 is characterized in that, described described strain rosette is five, is distributed in five dynamic acquisition measurement points,
3, diel dynamic stress strain gauge means according to claim 2, it is characterized in that, described described strain rosette, wherein: a strain rosette sticks in the shallow slot at punch-nose angle position, two strain rosettes stick in the shallow slot at die inlet fillet position, and latter two strain rosette sticks in the shallow slot at blank holder binder surface middle part.
4, according to claim 1 or 2 described diel dynamic stress strain gauge means, it is characterized in that, described described strain rosette, three foil gauges in the strain rosette link to each other respectively with three electric bridge boxes respectively.
5, diel dynamic stress strain gauge means according to claim 4 is characterized in that, each axial strain sheet specification of described resistance strain plate and strain rosette is identical.
6, diel dynamic stress strain gauge means according to claim 1 is characterized in that, described dynamic strain indicator has the analog quantity lead-out terminal, and the analog quantity lead-out terminal links to each other with the analog input channel of data collecting card.
7, diel dynamic stress strain gauge means according to claim 1 is characterized in that, described flat board is identical with measured diel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762000U CN201096560Y (en) | 2007-11-15 | 2007-11-15 | Stamping die dynamic stress strain measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762000U CN201096560Y (en) | 2007-11-15 | 2007-11-15 | Stamping die dynamic stress strain measurement device |
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| CN201096560Y true CN201096560Y (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200762000U Expired - Fee Related CN201096560Y (en) | 2007-11-15 | 2007-11-15 | Stamping die dynamic stress strain measurement device |
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| CN (1) | CN201096560Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004056A (en) * | 2010-12-24 | 2011-04-06 | 上海交通大学 | Self-piercing riveting quality online detection system and method |
| CN102564659A (en) * | 2012-01-14 | 2012-07-11 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN106370331A (en) * | 2016-08-18 | 2017-02-01 | 内蒙古包钢钢联股份有限公司 | Method for establishing the detection model for residual stress to cause section steel bending |
| CN106370332A (en) * | 2016-08-18 | 2017-02-01 | 内蒙古包钢钢联股份有限公司 | Method for detecting residual stress to cause section steel bending |
| CN107121225A (en) * | 2016-02-25 | 2017-09-01 | 陕西飞机工业（集团）有限公司 | A kind of measuring method of wing wallboard machining stress |
| CN108044012A (en) * | 2018-01-30 | 2018-05-18 | 二重（德阳）重型装备有限公司 | The deformation amount compensation process of forging mold |
| CN110006335A (en) * | 2019-04-30 | 2019-07-12 | 中铁五局集团第四工程有限责任公司 | A kind of near region Tunnel Blasting vibration dynamic strain test method suitable in built tunnel |
| CN111238692A (en) * | 2020-03-11 | 2020-06-05 | 四川建安工业有限责任公司 | Stress monitoring system for automobile chassis parts |
| CN112798039A (en) * | 2020-12-26 | 2021-05-14 | 北京工业大学 | Device for monitoring multidimensional stress strain in reinforced concrete member and mounting method |
-
2007
- 2007-11-15 CN CNU2007200762000U patent/CN201096560Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004056A (en) * | 2010-12-24 | 2011-04-06 | 上海交通大学 | Self-piercing riveting quality online detection system and method |
| CN102564659A (en) * | 2012-01-14 | 2012-07-11 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN102564659B (en) * | 2012-01-14 | 2014-09-10 | 江苏舒恒管夹制造有限公司 | Stress monitoring and early warning method and system for prestress ring of cold extrusion mold |
| CN107121225A (en) * | 2016-02-25 | 2017-09-01 | 陕西飞机工业（集团）有限公司 | A kind of measuring method of wing wallboard machining stress |
| CN107121225B (en) * | 2016-02-25 | 2019-12-24 | 陕西飞机工业（集团）有限公司 | Method for measuring machining stress of wing wall plate |
| CN106370331A (en) * | 2016-08-18 | 2017-02-01 | 内蒙古包钢钢联股份有限公司 | Method for establishing the detection model for residual stress to cause section steel bending |
| CN106370332A (en) * | 2016-08-18 | 2017-02-01 | 内蒙古包钢钢联股份有限公司 | Method for detecting residual stress to cause section steel bending |
| CN108044012A (en) * | 2018-01-30 | 2018-05-18 | 二重（德阳）重型装备有限公司 | The deformation amount compensation process of forging mold |
| CN108044012B (en) * | 2018-01-30 | 2018-10-12 | 二重（德阳）重型装备有限公司 | The deformation amount compensation process of forging mold |
| CN110006335A (en) * | 2019-04-30 | 2019-07-12 | 中铁五局集团第四工程有限责任公司 | A kind of near region Tunnel Blasting vibration dynamic strain test method suitable in built tunnel |
| CN111238692A (en) * | 2020-03-11 | 2020-06-05 | 四川建安工业有限责任公司 | Stress monitoring system for automobile chassis parts |
| CN112798039A (en) * | 2020-12-26 | 2021-05-14 | 北京工业大学 | Device for monitoring multidimensional stress strain in reinforced concrete member and mounting method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20111115 |