CN109604408A - A method of plate stamping die trial success rate is improved with grid strain analysis method - Google Patents
A method of plate stamping die trial success rate is improved with grid strain analysis method Download PDFInfo
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- CN109604408A CN109604408A CN201811263557.9A CN201811263557A CN109604408A CN 109604408 A CN109604408 A CN 109604408A CN 201811263557 A CN201811263557 A CN 201811263557A CN 109604408 A CN109604408 A CN 109604408A
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- strain
- grid
- die trial
- plate
- strain analysis
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a kind of methods for improving plate stamping die trial success rate with grid strain analysis method, belong to sheet stamping forming technical field.Technical solution is: to during punching press die trial, there are grid strain analysis is carried out at cracking risk, the deformation of the region plate is carried out quantization and visualized graphs processing: the quantization of deformed region is that deformed region is carried out grid strain analysis, and the principal strain of the region deformation, secondary strain and thick to strain are gone out by digitizing grid strain analysis system-computed.The present invention provides intuitive and reliable data to the cracking risk during assessing punching press die trial, visual graphics process is carried out to the mass data generated is calculated, it can intuitively, visually show the deformation extent of plate, it can be quickly to there are make assessment at cracking risk during punching press die trial, to select suitable plate or be optimized to mould structure design, the rejection rate of punching parts during die trial is effectively reduced, die trial cost is effectively reduced.
Description
Technical field
The present invention relates to a kind of methods for improving plate stamping die trial success rate with grid strain analysis method, belong to plate punching
Pressing formation technical field.
Background technique
Currently, with the rapid development of automobile industry, automobile industry new model is constantly updated, the structure class of stamping parts of automobile
Type towards diversified development, stamping die newly developed often will appear during die trial stamping cracking, corrugation phenomena such as；Or
It is that when replacing a kind of new material, also will appear cracking, corrugated risk.The method for such issues that prior art solves, often
It is according to the experience of live stamping engineering teacher, constantly to stamping process parameters (including pressure-pad-force, drawing velocity, degree of lubrication etc.)
It is adjusted, even can rule of thumb modify mould structure sometimes, this not only proposes higher want to the experience of punching press engineer
Ask, once while mold modification failure, scrapping for entire mold is resulted even in when serious, causes biggish economic loss.
Summary of the invention
It is an object of the present invention to provide a kind of methods for improving plate stamping die trial success rate with grid strain analysis method, pass through
Grid strain analysis is carried out to the position that there is cracking, corrugation risk during punching press die trial, then with the plate forming limit
Figure is compared, and to assess plate die trial, there are the positions of cracking risk in the process, to design mould structure unreasonable
Place modify, or the plate of the suitable trade mark of selection solves to improve success rate of plate during punching press die trial
The certainly above problem existing for prior art.
The technical solution adopted by the present invention is that:
A method of plate stamping die trial success rate being improved with grid strain analysis method, is cracked to existing during punching press die trial
Grid strain analysis is carried out at risk, and the deformation of the region plate is subjected to quantization and visualized graphs are handled: deformed area
The quantization in domain is that deformed region is carried out grid strain analysis, goes out region change by digitizing grid strain analysis system-computed
The principal strain of shape, secondary strain and thick to strain；Producing comprising strain analysis grid, part photo acquisition, strain grid
Measurement is compared with calculating, with Forming Limit of Sheet Metals figure；Detailed process is as follows: by plate, there are strain at stamping cracking risk
Grid is produced；Then the punching press that part is carried out using the tablet, carries out part photo acquisition；Using digitlization strain grid point
There are measurements and calculating that grid at cracking risk carries out strain grid, including its principal strain, secondary strain to after punching press for analysis system
And it is thick to strain；It compares with this with Forming Limit of Sheet Metals figure, the forming property of plate or mould structure is set later finally
The reasonability of meter is assessed, to propose the plate or needle of the higher trade mark of replacement to the plate for being not suitable for the stamping procedure
The place unreasonable to mould structure proposes change, such as increases transition arc, reduces drawing depth measure.
The strain grid is produced, and carries out grid printing, size of mesh opening 2.5 to sheet metal using metal marking machine
The grid of × 2.5mm or 5.0 × 5.0mm.
The part photo acquisition carries out photo acquisition to region to be measured using high pixel camera, needs in collection process
It is demarcated with calibrated bolck.
The measurement and calculating of the strain grid strain region to be measured using digitlization grid strain analysis system
Analysis and calculating.
It is described to compare with Forming Limit of Sheet Metals figure, be by the resulting principal strain of regional analysis to be measured, secondary strain numerical value with
The forming limit diagram of the plate compares, and observes distribution of the areal strain numerical value to be measured in forming limit diagram, thus
Punching press die trial situation is judged.
The invention has the advantages that: the intuitive and reliable data of offer to the cracking risk during assessing punching press die trial, right
It calculates the mass data generated and carries out visual graphics process, can intuitively, visually show the deformation extent of plate, it can
Quickly to punching press die trial in the process there are assessment is made at cracking risk, to select suitable plate or design mould structure
It optimizes, the rejection rate of punching parts during die trial is effectively reduced, die trial cost is effectively reduced.Therefore the method for the present invention tool
There is the characteristics of low production cost, simple process, accuracy rate are high, the method is simple and quick.
Detailed description of the invention
Fig. 1 is that the die trial of DC06 plate of the embodiment of the present invention partial region cracking phenomena figure occurs in the process；
Fig. 2 is the principal strain cloud atlas of the embodiment of the present invention；
Fig. 3 is the secondary strain cloud atlas of the embodiment of the present invention；
Fig. 4 is the principal strain figure of the embodiment of the present invention；
Fig. 5 is the principal strain figure of the embodiment of the present invention；
Fig. 6 is distribution map of the areal strain point to be measured of the embodiment of the present invention in the Forming Limit of Sheet Metals figure.
Specific embodiment
Below in conjunction with attached drawing, by embodiment, the present invention will be further described.
In embodiment, referring to attached drawing 1, the DC06 plate to produce to certain steel mill carries out the carry out punching press examination of front door inner panel
There is partial region cracking phenomena during die trial in mould, carries out grid strain analysis, analysis knot using heretofore described method
Fruit is as follows:
During punching press die trial, risk in attached drawing 1 at labeling position No. 8, No. 9 with the presence of part stamping cracking, needle
Grid strain analysis is carried out to the region, analysis result is as follows:
Referring to attached drawing 2,3,4,5,6, cloud atlas is strained according to it, can very visual pattern the strained situation for finding out the region, answer
Variable value can accurately judge the deformation in each region of plate, strain point (ε1, ε2) dividing in the Forming Limit of Sheet Metals figure
Cloth is as follows, it can be seen that the safety zone for falling in the Forming Limit of Sheet Metals figure is largely put in the region to be measured, and partial dot falls in the plate
The transition region of material forming limit diagram illustrates that there are cracking risks in punching course, it is possible thereby to judge, which ties at this
Structure design pull-up deeply spends height, need to optimize.
Claims (5)
1. a kind of method for improving plate stamping die trial success rate with grid strain analysis method, it is characterised in that: to punching press die trial
There is progress grid strain analysis at cracking risk in the process, the deformation of the region plate is subjected to quantization and visualization figure
Shape processing: the quantization of deformed region is that deformed region is carried out grid strain analysis, by digitizing grid strain analysis system
Calculate the principal strain of the region deformation, secondary strain and thick to strain；Producing comprising strain analysis grid, part photo is adopted
Collection, the measurement of strain grid and calculating are compared with Forming Limit of Sheet Metals figure；Detailed process is as follows: by plate, there are stamping crackings
Producing for strain grid is carried out at risk；Then the punching press that part is carried out using the tablet, carries out part photo acquisition；Using number
There are measurements and calculating that grid at cracking risk carries out strain grid to after punching press for word grid strain analysis system, including its
Principal strain, secondary strain and thick to strain；Compared later with this and Forming Limit of Sheet Metals figure, finally to the forming property of plate or
The reasonability of person's mould structure design is assessed.
2. a kind of method for improving plate stamping die trial success rate with grid strain analysis method according to claim 1,
Be characterized in that: the strain grid is produced, and carries out grid printing to sheet metal using metal marking machine, size of mesh opening is
The grid of 2.5 × 2.5mm or 5.0 × 5.0mm.
3. a kind of method for improving plate stamping die trial success rate with grid strain analysis method according to claim 1 or 2,
It is characterized by: the part photo acquisition, photo acquisition is carried out to region to be measured using high pixel camera, in collection process
It needs to be demarcated with calibrated bolck.
4. a kind of method for improving plate stamping die trial success rate with grid strain analysis method according to claim 1 or 2,
It is characterized by: the measurement and calculating of the strain grid, carry out region to be measured using digitlization grid strain analysis system
Strain analysis and calculating.
5. a kind of method for improving plate stamping die trial success rate with grid strain analysis method according to claim 1 or 2,
It is characterized by: described compare with Forming Limit of Sheet Metals figure, it is by the numerical value of the resulting principal strain of regional analysis to be measured, secondary strain
It is compared with the forming limit diagram of the plate, observes distribution of the areal strain numerical value to be measured in forming limit diagram, from
And punching press die trial situation is judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811263557.9A CN109604408A (en) | 2018-10-28 | 2018-10-28 | A method of plate stamping die trial success rate is improved with grid strain analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811263557.9A CN109604408A (en) | 2018-10-28 | 2018-10-28 | A method of plate stamping die trial success rate is improved with grid strain analysis method |
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| CN109604408A true CN109604408A (en) | 2019-04-12 |
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| CN201811263557.9A Pending CN109604408A (en) | 2018-10-28 | 2018-10-28 | A method of plate stamping die trial success rate is improved with grid strain analysis method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069338A (en) * | 2019-12-27 | 2020-04-28 | 上海交通大学 | Convex feature roll punching forming limit evaluation die and measuring method thereof |
| CN111496121A (en) * | 2020-03-19 | 2020-08-07 | 上海理工大学 | Method for selecting seal head material for deep drawing forming of simple pressure container and seal head forming process |
| CN112883599A (en) * | 2021-01-12 | 2021-06-01 | 中铝材料应用研究院有限公司 | Method for evaluating stamping forming performance of magnesium alloy plate for preparing box-shaped component |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111069338A (en) * | 2019-12-27 | 2020-04-28 | 上海交通大学 | Convex feature roll punching forming limit evaluation die and measuring method thereof |
| CN111496121A (en) * | 2020-03-19 | 2020-08-07 | 上海理工大学 | Method for selecting seal head material for deep drawing forming of simple pressure container and seal head forming process |
| CN112883599A (en) * | 2021-01-12 | 2021-06-01 | 中铝材料应用研究院有限公司 | Method for evaluating stamping forming performance of magnesium alloy plate for preparing box-shaped component |
| CN112883599B (en) * | 2021-01-12 | 2024-05-03 | 中铝材料应用研究院有限公司 | Evaluation method for stamping forming performance of magnesium alloy plate for preparing box-shaped member |
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