CN109556507A - A kind of lightweight stamping die self-operated measuring unit - Google Patents
A kind of lightweight stamping die self-operated measuring unit Download PDFInfo
- Publication number
- CN109556507A CN109556507A CN201811420641.7A CN201811420641A CN109556507A CN 109556507 A CN109556507 A CN 109556507A CN 201811420641 A CN201811420641 A CN 201811420641A CN 109556507 A CN109556507 A CN 109556507A
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- CN
- China
- Prior art keywords
- strain
- stamping die
- plate
- rosette
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/225—Measuring circuits therefor
- G01L1/2262—Measuring circuits therefor involving simple electrical bridges
Abstract
A kind of lightweight stamping die self-operated measuring unit of field of measuring technique, including strain rosette, resistance strain plate, bridge box, dynamic strain indicator, displacement sensor, industrial computer, plate, strain rosette is pasted onto measured stamping die position to be measured, resistance strain plate is pasted on plate, plate is placed near measured stamping die, strain rosette includes triaxial strain piece, the each foil gauge of strain rosette connects one to one with resistance strain plate, and a bridge box is connected in a manner of single bridge, one bridge box is connected with a strain measurement channel of dynamic strain indicator, dynamic strain indicator and displacement sensor are connected with the data collecting card in industrial computer respectively, displacement sensor probe portion is fixed on measured stamping die punch-pin, its fixing end is fixed on measured stamping die cavity plate.Strain gauge adhesion of the present invention is convenient, and measurement accuracy is high, and dynamic response is fast, and automatization level is high.
Description
Technical field
The present invention relates to a kind of lightweight stamping die self-operated measuring units, belong to automobile die technology field.
Background technique
The requirement of automotive light weight technology keeps the strength grade of automotive sheet higher and higher, advanced high-strength steel and superhigh intensity
Steel is increasingly being applied to Auto-body manufacturing.Ultralight steel body project in order to mitigate car body weight and improve body construction performance,
Advanced high-strength steel and unimach dosage are more than 90%.Compared to traditional mild steel, needed for high-strength steel sheet punching press at
Shape load improves 1~2 times, and the Problem of Failure of high-strength steel stamping mold becomes prominent.In order to check high-strength steel stamping mold
Intensity, rigidity, predict stamping die service life and optimization punching die structure, need a kind of dynamic measurement stamping die at
The device of ess-strain during shape.
It finds by prior art documents, L.Shulkin etc. is in " Journal of Materials
Processing Technology " a text " Elastic on (material forming techniques journal) 59 phase page 34~40 in 1996
Deflections of the blank holder in deep drawing of sheet metal " (plate deep-draw plutonic
The flexible deformation of blank holder in shape) in mention with pressure film (original text is expressed as pressure film) measure stamping die pressure
The distributed force being subject on flange, but require when being measured with the method plate and mold without opposite sliding, in practical punching course
Blank deformation, blank are slided in die surface, so the dynamic for not being available stamping die in this method measurement punching course is answered
Power, strain.
Summary of the invention
The present invention is directed to above-mentioned the problems of the prior art, provides a kind of stamping die dynamic stress and strain measurement dress
It sets, ess-strain of the mold in dynamic punching course can be acquired by strain rosette, and on industrial computer screen
Ess-strain in real-time display stamping die, while strain gauge adhesion is convenient, measurement accuracy is higher.
The present invention is achieved by the following technical solutions, the present invention include: strain rosette, resistance strain plate, bridge box,
Dynamic strain indicator, displacement sensor, industrial computer, plate, in which: strain rosette is pasted onto the to be measured of measured stamping die
Position, resistance strain plate are pasted on plate, and plate, which is located at, to be measured near stamping die.Strain rosette includes triaxial strain
Piece, each axial strain piece and a resistance strain plate for strain rosette connects one to one, and one is connected in a manner of single bridge
Bridge box, a bridge box are connected with a strain measurement channel of dynamic strain indicator, dynamic strain indicator and displacement sensor point
It is not connected with the data collecting card in industrial computer, the probe portion of displacement sensor is fixed on the convex of measured stamping die
On mould, the fixing end of displacement sensor is fixed on the cavity plate of measured stamping die.
The plate is identical as measured stamping die material and not by external force.
The resistance strain plate is identical as each axial strain piece specification of strain rosette, is responsible for carrying out temperature benefit to strain rosette
It repays.
Institute's displacement sensors are responsible for the stroke of detection punching course convex mould.
The dynamic strain indicator has analog output terminal, the analog quantity of analog output terminal and data collecting card
Input channel is connected, and the strain measured is converted into voltage signal and exported by dynamic strain indicator, this voltage signal access data are adopted
The analog quantity voltage input channel of truck.
Its internal data collecting card of the Industrial Computer Control, works according to preset program, realizes stamping die punching
Press through the measurement, storage and display of journey dynamic stress and strain.
Number, the number of bridge box, dynamic strain of strain rosette may be selected according to point to be measured in stamping die ground number
Data collecting card analog acquisition passage number on instrument autonomous channel number and industrial computer.
When the invention works, stamping die stress is complicated, is generally under complex stress strain regime, and strain rosette is secured
It is pasted on stamping die position to be measured, three axial strain pieces of strain rosette can measure three different directions in position to be measured
Strain value, acquire the stress-strain state of the measuring point according to generalized Hooke's law, cooperation displacement sensor measures convex
Line journey can connect the ess-strain in punching course on mold with press depth, each axial strain of strain rosette
Piece and a resistance strain plate are connected to a bridge box in a manner of single bridge, constitute a strain measurement circuit, and resistance-type is answered
Become piece and be pasted onto be located at and is measured near stamping die, it is identical as measured stamping die material, not by one piece of external force
On plate, temperature compensation function is played, a bridge box is connected to a strain measurement channel of dynamic strain indicator, dynamic strain
Instrument is the power supply of strain measurement circuit, and measures the variation of strain measurement circuit voltage, the variation of strain measurement circuit voltage and stamping die
Have to be measured position and strain and have determining relationship, using this relationship, stamping die can be obtained and be measured answering for one, position direction
Become, and be converted to the analog quantity voltage signal of dynamic strain indicator output channel, this analog quantity voltage signal access industrial is calculated
The input channel of data collecting card in machine, its internal data collecting card of Industrial Computer Control, works according to preset program,
It realizes measurement, operation, the storage of stamping die punching course dynamic stress and strain, and the stress that stamping die is measured point is answered
Become with punch travel variation in a manner of patterned real-time display on the output display unit of industrial computer.
The positive effect of the present invention is: using stress of apparatus of the present invention measurement stamping die during Box-Shaped Drawing
Strain, measurement is convenient, response is fast, and highest sampling rate is up to 250 bits per seconds, and automatization level is high.In stamping die
Ess-strain on industrial computer screen real-time display, be conducive to monitor punching course in real time, be stored in industry
Data on computer are also convenient for subsequent analysis and research.
Detailed description of the invention
Fig. 1 schematic structural diagram of the device of the invention.
Specific embodiment
Elaborate with reference to the accompanying drawing to the embodiment of the present invention: the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
The embodiment stated.
As shown in Figure 1, the present embodiment is for dynamically measuring a hyperbolic bottom surface Box-Shaped Drawing mold in Box-Shaped Drawing
Process convex mould 8, cavity plate 10, the ess-strain on blank holder 9.In the present embodiment, position to be measured at one is selected on punch-pin 8,
Positioned at 8 fillet position of punch-pin, measuring point at two is selected on cavity plate 10, is located at 10 entrance circular angle position of cavity plate, is selected on blank holder 9
Measuring point at two is selected, is located in the middle part of blank holder binder surface, these positions are that mold stress is disliked in Box-Shaped Drawing forming process
Bad position, in order to facilitate strain rosette stickup, measuring point has opened up shallow slot at the five of selection.
The present embodiment includes: strain rosette 1, resistance strain plate 2, bridge box 3, dynamic strain indicator 4, industrial computer 5, position
Displacement sensor 6, plate 7, in which: strain rosette 1 is pasted onto the position to be measured of measured stamping die, and resistance strain plate 2 is viscous
It is attached to plate 7, plate 7, which is located at, to be measured near stamping die.Strain rosette 1 includes triaxial strain piece, and each axis of strain rosette 1 is answered
Become piece to connect one to one with a resistance strain plate 2, and be connected to a bridge box 3 in a manner of single bridge, composition is measured
One of the strain measurement circuit in stamping die one one direction in position to be measured, a bridge box 3 and dynamic strain indicator 4 answers
Become Measurement channel to be connected, dynamic strain indicator 4 and displacement sensor 6 are connected with the data collecting card in industrial computer 5 respectively, position
The probe portion of displacement sensor 6 is fixed on the punch-pin 8 of measured stamping die, the fixing end of displacement sensor 6 be fixed on by
On the cavity plate 10 for measuring stamping die.
The plate 7 is identical as measured stamping die material and not by external force.
The strain rosette 1 is five, while five measurement points of dynamic acquisition, the stress in each 3 directions of measurement point are answered
Become, one of strain rosette is pasted onto the shallow slot at 8 fillet position of punch-pin, other two strain rosette is pasted onto 10 entrance of cavity plate circle
In the shallow slot of angular position, most latter two strain rosette is pasted onto the shallow slot in the middle part of 9 binder surface of blank holder.
The strain rosette 1, three foil gauges and three bridge boxes of each strain rosette 1 are respectively connected with, each 3 He of electricity box bridge
One strain measurement channel of dynamic strain indicator 4 is connected, and output channel and the data collecting card one of each dynamic strain indicator 4 is adopted
Collect channel, so, the present embodiment uses 15 bridge boxes, the data collecting card of four dynamic strain indicators, 16 bit ports.
The resistance strain plate 2 is identical as each axial strain piece specification of strain rosette 1, is responsible for carrying out temperature to strain rosette 1
Degree compensation.
The dynamic strain indicator 4 is YD-28A type dynamic resistance strain instrument, and there are four independent for every dynamic resistance strain instrument
Channel.
The dynamic strain indicator 4 has analog output terminal, the analog quantity of analog output terminal and data collecting card
Input channel is connected, and the strain measured is converted into voltage signal and exported by dynamic strain indicator 4, this voltage signal access data are adopted
The analog quantity voltage input channel of truck.
The data collecting card, for grind China PCI1716 multifunctional data acquisition card, single ended mode have 16 simulation/
Digital conversion channel, analog/digital conversion precision 16, onboard first in first out caches 4K, highest sampling rate 250K bps, number
According to the ess-strain information of 15 channels access, 15 output channels of dynamic strain indicator output in 16 channels of capture card, data
The output signal of the remaining channel access displacement sensor 6 of capture card, records 8 stroke of drawing punch-pin, by answering on mold
Stress-strain and Box-Shaped Drawing depth are mapped.
Institute's displacement sensors 6 are responsible for the stroke of detection punching course convex mould 8.
When the course of work of the present embodiment, starts dynamic strain indicator 4 first and reset, dynamic strain indicator 4 starts to by answering
Become the strain measurement circuit for spending 1, resistance strain plate 2 and bridge box 3 to form to power and detect strain measurement circuit bridge voltage；So
Start industrial computer 5 afterwards, industrial computer 5 is configured data collecting card mounted thereto, enables data collecting card
It is enough that the analog quantity voltage signal in each channel is converted into digital signal according to the frequency of setting, these analog quantity voltage signals difference
From dynamic strain indicator 4 and displacement sensor 6, the voltage signal of dynamic strain indicator 4 reflects answering for stamping die detected part
Become information, the voltage signal of displacement sensor 6 reflects 8 stroke of stamping die punch-pin；Secondly starting press machine carries out box part
Drawing, during Box-Shaped Drawing, punch-pin 8, cavity plate 10 and the effect loaded of blank holder 9 of stamping die are deformed, and are glued
The strain rosette 1 being attached on punch-pin 8, cavity plate 10 and blank holder 9 deforms together with them, and the deformation of strain rosette 1 contains ring
The influence of border temperature change, and resistance strain plate 2 can play the influence for eliminating variation of ambient temperature, strain rosette 1 and resistance
The deformation of formula foil gauge 2 leads to strain measurement circuit bridge voltage change, and bridge voltage is detected by dynamic strain indicator 4 and is converted into simulating
Amount voltage signal is sent to the data collecting card on industrial computer 5 and is mounted on mould structure during Box-Shaped Drawing
Punch displacement signal is converted to analog quantity voltage signal by displacement sensor 6, the data acquisition being sent on industrial computer 5 together
Stamping die after calculation process, is measured the stress of point by card, industrial computer 5 by the collected signal of data collecting card
Strain is deposited on the output display unit of industrial computer 5 simultaneously with 8 stroke of punch-pin variation real-time display in a manner of patterned
Storage is stand-by；After the completion of Box-Shaped Drawing, 8 backhaul of punching press punch-pin, blank holder is lifted；Finally stop industrial computer 5, is rushed
If doing the ess-strain in entire punching course on compression mould with the change curve of drawing stroke.
Claims (7)
1. a kind of lightweight stamping die self-operated measuring unit, comprising: strain rosette, industrial computer, which is characterized in that also wrap
Include: resistance strain plate, bridge box, dynamic strain indicator, displacement sensor, plate, strain rosette are pasted onto measured stamping die
Position to be measured, resistance strain plate is pasted on plate, and strain rosette includes triaxial strain piece, each axial strain of strain rosette
Piece connects one to one with a resistance strain plate, and a bridge box is connected in a manner of single bridge, and bridge box is answered with dynamic
A strain measurement channel for becoming instrument is connected, and dynamic strain indicator and displacement sensor are acquired with the data in industrial computer respectively
Card is connected, and the probe portion of displacement sensor is fixed on the punch-pin of measured stamping die, and the fixing end of displacement sensor is solid
It is scheduled on the cavity plate of measured stamping die.
2. lightweight stamping die self-operated measuring unit according to claim 1, characterized in that the strain
Flower is five, is distributed in five dynamic acquisition measurement points.
3. lightweight stamping die self-operated measuring unit according to claim 2, characterized in that the strain
Flower a, in which: strain rosette is pasted onto the shallow slot at punch-nose angle position, and two strain rosettes are pasted onto cavity plate entrance circular angle position
Shallow slot in, most latter two strain rosette is pasted onto the shallow slot in the middle part of blank holder binder surface.
4. lightweight stamping die self-operated measuring unit according to claim 1 or 2, characterized in that described is described
Strain rosette, three foil gauges in strain rosette are respectively connected with three bridge boxes respectively.
5. lightweight stamping die self-operated measuring unit according to claim 4, characterized in that the resistance-type strain
Piece is identical as each axial strain piece specification of strain rosette.
6. lightweight stamping die self-operated measuring unit according to claim 1, characterized in that the dynamic strain indicator,
With analog output terminal, analog output terminal is connected with the analog input channel of data collecting card.
7. lightweight stamping die self-operated measuring unit according to claim 1, characterized in that the plate and be measured
Stamping die material is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420641.7A CN109556507A (en) | 2018-11-26 | 2018-11-26 | A kind of lightweight stamping die self-operated measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420641.7A CN109556507A (en) | 2018-11-26 | 2018-11-26 | A kind of lightweight stamping die self-operated measuring unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109556507A true CN109556507A (en) | 2019-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811420641.7A Pending CN109556507A (en) | 2018-11-26 | 2018-11-26 | A kind of lightweight stamping die self-operated measuring unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN109556507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090877A (en) * | 2019-05-29 | 2019-08-06 | 安徽绿能技术研究院有限公司 | A kind of Bending Mould online test method |
| 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 |
-
2018
- 2018-11-26 CN CN201811420641.7A patent/CN109556507A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090877A (en) * | 2019-05-29 | 2019-08-06 | 安徽绿能技术研究院有限公司 | A kind of Bending Mould online test method |
| 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 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190402 |
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| WD01 | Invention patent application deemed withdrawn after publication |