CN203929533U - Automotive sheet FLC curve determination device based on DIC technology - Google Patents
Automotive sheet FLC curve determination device based on DIC technology Download PDFInfo
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- CN203929533U CN203929533U CN201420301538.1U CN201420301538U CN203929533U CN 203929533 U CN203929533 U CN 203929533U CN 201420301538 U CN201420301538 U CN 201420301538U CN 203929533 U CN203929533 U CN 203929533U
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- die
- blank holder
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- testing machine
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- 238000005516 engineering process Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000004080 punching Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007652 sheet-forming process Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model provides a kind of automotive sheet FLC curve determination device based on DIC technology, comprises Material Testing Machine, video camera, computing machine and bulging test device; Bulging test device comprises upper bed-plate, die, blank holder, lower bottom base and drift.Die and blank holder form by base plate and cylinder table, and cylinder table is bolted in rectangular base plate, and in the middle of cylinder table, with punching, base plate front and rear side has draw-in groove on edge; Die is provided with pilot hole, and blank holder upper surface is provided with register pin; Drift upper end is with semisphere pressure head; Upper bed-plate is secured by bolts on Material Testing Machine mounting platform, and die is connected to below upper bed-plate, and blank holder is arranged on above lower bottom base, and lower bottom base is fixed on Material Testing Machine hoistable platform, and drift is arranged on the hydraulic cylinder of Material Testing Machine; Video camera is connected with computing machine.The utility model convenient operation, time saving and energy saving, can greatly improve measuring accuracy, be convenient to the observation of necking phenomenon and research.
Description
Technical field
The utility model belongs to Automobile Plate forming property check field, relates in particular to a kind of automotive sheet FLC curve determination device based on DIC technology.
Background technology
FLC curve (Forming Limited Curve, shaping limit curve) is to evaluate sheet moulding performance the most intuitively and effective method, uses very extensive in Automobile Plate drawing.It is significant that the theoretical research of FLC curve solves the aspects such as engineering problem for actual effect reason, actual effect rule and precision in announcement sheet forming process.
Experiment, theory and numerical analysis for FLC curve are the focuses of lot of domestic and foreign scholar's research always.Through method research widely, the mode of the FLC curve obtaining by bulging test method is approved.In bulging experimentation, for obtaining as much as possible with corresponding in actual production process deformation state, difform sample is stamped until there is constriction fracture, adopt traditional gridding method (CGA, Circle Grid Analysis) or digital picture correlation technique (DIC, Digital ImageCorrelation) measure near the principal strain value of test specimen surface fracture mouth, finally the principal strain value point-rendering of each test specimen is become to the coordinate system about master-inferior strain, draw out FLC curve.
Traditional gridding method (CGA technology) or digital picture correlation technique (DIC technology) are owing to obtaining strain value to being out of shape test specimen measurement after experiment finishes, can not specifically follow the tracks of experimentation (test specimen constriction is to breaking), so the precision of experimental data is low; Owing to being subject to the impact of light and plate surface quality, often need revision test, wasted a large amount of human and material resources.Meanwhile, because experience and the gimmick of experimental work varies with each individual, cause equally the method existing certain error aspect the measuring accuracy of strain value, accuracy, experimental cost is also higher.
Summary of the invention
The utility model aims to provide a kind of can realization the deformation of test specimen surface mesh is obtained continuously, and can research and analyse test specimen constriction to the process of breaking, time saving and energy saving, and can improve the device of the automotive sheet FLC curve determination based on DIC technology of measuring accuracy.
For this reason, the solution that the utility model is taked is:
An automotive sheet FLC curve determination device based on DIC technology, comprises Material Testing Machine, it is characterized in that, sets up video camera, computing machine and bulging test device; Bulging test device comprises upper bed-plate, die, blank holder, lower bottom base and drift; Die and blank holder all form " protruding " shape by base plate and cylinder table, and cylinder table is bolted in rectangular base plate, and in the middle of cylinder table, with punching, base plate front and rear side has draw-in groove on edge; Die cylinder table is provided with pilot hole, and blank holder cylinder table upper surface and die pilot hole correspondence position are provided with register pin; The upper end of cylindrical punch is with semisphere pressure head; Upper bed-plate is secured by bolts on the mounting platform of Material Testing Machine upper end, die is bolted below upper bed-plate, blank holder is arranged on above lower bottom base, and lower bottom base is secured by bolts on Material Testing Machine hoistable platform, and drift is arranged on the hydraulic cylinder below Material Testing Machine; Video camera is connected with computing machine.
Described video camera is the high-speed camera with 4 cameras.
Described die lower surface and blank holder upper surface are that both obverse punching edges are all with a circle boss.
The mensuration process of the utility model automotive sheet FLC curve is:
1, prepare the automotive sheet sample of one group of 20～180mm different in width, sample centre width is little, and around flanging partial width is large, and the transition of limit portion is round and smooth, and print at sample upper surface the grid that the length of side is 2mm, sample lower surface is pasted a circular silicagel pad that thickness is 3～4mm.
2, sample is placed on above blank holder, starts Material Testing Machine and promote hoistable platform, blank holder and die is closed, blank holder register pin is inserted in die pilot hole, and sample is clamped between die and blank holder.
3, the video camera connecting and computing machine are placed on to the top of Material Testing Machine, make camera lens aim at die punching, and adjust aperture and the angle of video camera.
4, start Material Testing Machine hydraulic cylinder, make drift rising, drift upper end semisphere pressure head carries out punching stretch to sample, until crackle appears in sample, video camera takes whole sample and grid deformation process, and by whole image transmitting to computing machine.
5, computing machine employing digital picture correlation technique is that DIC software is processed the surface strain image of sample in whole deformation process, and calculates the ultimate strain value of sample.
6, the sample of changing different in width, repeats step 2～5, until obtain the ultimate strain value that this organizes all samples.
The strain variation cloud atlas of the different in width sample 7, calculating according to computer software, connects into line by each ultimate strain value point, draws out the FLC curve of this group automotive sheet.
The beneficial effects of the utility model are:
The utility model is simple and practical, and convenient operation is time saving and energy saving, and can greatly improve measuring accuracy, digital picture correlation technique (DIC technology) is applied to the strain measurement of grid, has avoided the use of calibrating block in traditional bulging experimental provision, be convenient to necking phenomenon to observe and study.
Accompanying drawing explanation
Fig. 1 is automotive sheet FLC curve determination apparatus structure schematic diagram;
Fig. 2 is die front view;
Fig. 3 is blank holder stereographic map;
Fig. 4 is drift front view.
In figure: drift 1, lower bottom base 2, sample 3, Material Testing Machine 4, mounting platform 5, high-speed camera 6, computing machine 7, upper bed-plate 8, die 9, blank holder 10, hoistable platform 11, hydraulic cylinder 12, die base plate 131, blank holder base plate 132, die cylinder table 141, blank holder cylinder table 142, die base plate draw-in groove 151, blank holder base plate draw-in groove 152, die boss 161, blank holder boss 162, pilot hole 17, die punching 181, blank holder punching 182, register pin 19, pressure head 20.
Embodiment
As seen from Figure 1, the utility model automotive sheet FLC curve determination device system is comprised of Material Testing Machine 4, high-speed camera 6, computing machine 7 and bulging test device.High-speed camera 6 with 4 cameras is connected with computing machine 7.Material Testing Machine 4 is supported by 4 guide pillars, and guide pillar upper end is provided with mounting platform 5, and bottom is provided with hoistable platform 11, and hydraulic cylinder 12 is equipped with in bottom, and hoistable platform 11 can move up and down along guide pillar.
Bulging test device comprises that drift 1, lower bottom base 2, upper bed-plate 8, die 9 and blank holder 10 form.Drift 1 integral body is a right cylinder, in cylindrical upper end with semisphere pressure head 20 (seeing Fig. 4).Fig. 2 demonstration, die 8 is same with blank holder 10 shape fundamental forms, and its global shape is " protruding " shape.Die 8 is comprised of die base plate 131, die cylinder table 141, die cylinder table 141 is bolted on rectangle die base plate 131, die cylinder table 141 is middle with die punching 181, die punching 181 edges are provided with a circle die boss 161, at die cylinder table 141 lower surfaces (with blank holder cylinder table 142 corresponding surfaces), be provided with 2 pilot holes 17, die base plate 131 front and rear side respectively have 2 die base plate draw-in grooves 151 along upper.Fig. 3 shows, blank holder 10 is comprised of blank holder base plate 132, blank holder cylinder table 142, blank holder cylinder table 142 is bolted on blank holder base plate 132, blank holder cylinder table 142 is middle with blank holder punching 182, blank holder punching 182 edges are provided with a circle blank holder boss 162, blank holder cylinder table 142 upper surfaces and die 9 pilot hole 17 correspondence positions are provided with 2 register pins 19, and blank holder base plate 132 front and rear side respectively have 2 die base plate draw-in grooves 151 along upper.
Upper bed-plate 8 is secured by bolts on Material Testing Machine 4 guide pillar upper end mounting platforms 5, die 9 is bolted below upper bed-plate 8, blank holder 10 is arranged on above lower bottom base 2, lower bottom base 2 is secured by bolts on the hoistable platform 11 of Material Testing Machine 4, and drift 1 is arranged on the hydraulic cylinder 12 of Material Testing Machine 4.The axis of drift 1 overlaps with die punching 181 center lines, blank holder punching 182 center line threes.
Claims (3)
1. the automotive sheet FLC curve determination device based on DIC technology, comprises Material Testing Machine, it is characterized in that, sets up video camera, computing machine and bulging test device; Bulging test device comprises upper bed-plate, die, blank holder, lower bottom base and drift; Die and blank holder all form " protruding " shape by base plate and cylinder table, and cylinder table is bolted in rectangular base plate, and in the middle of cylinder table, with punching, base plate front and rear side has draw-in groove on edge; Die cylinder table is provided with pilot hole, and blank holder cylinder table upper surface and die pilot hole correspondence position are provided with register pin; The upper end of cylindrical punch is with semisphere pressure head; Upper bed-plate is secured by bolts on the mounting platform of Material Testing Machine upper end, die is bolted below upper bed-plate, blank holder is arranged on above lower bottom base, and lower bottom base is secured by bolts on Material Testing Machine hoistable platform, and drift is arranged on the hydraulic cylinder below Material Testing Machine; Video camera is connected with computing machine.
2. the automotive sheet FLC curve determination device based on DIC technology according to claim 1, is characterized in that, described video camera is the high-speed camera with 4 cameras.
3. the automotive sheet FLC curve determination device based on DIC technology according to claim 1, is characterized in that, described die lower surface and blank holder upper surface are that both obverse punching edges are all with a circle boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301538.1U CN203929533U (en) | 2014-06-09 | 2014-06-09 | Automotive sheet FLC curve determination device based on DIC technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420301538.1U CN203929533U (en) | 2014-06-09 | 2014-06-09 | Automotive sheet FLC curve determination device based on DIC technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929533U true CN203929533U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420301538.1U Expired - Fee Related CN203929533U (en) | 2014-06-09 | 2014-06-09 | Automotive sheet FLC curve determination device based on DIC technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN203929533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223090A (en) * | 2014-06-09 | 2016-01-06 | 鞍钢股份有限公司 | A kind of automotive sheet FLC curve determination device and method based on DIC technology |
-
2014
- 2014-06-09 CN CN201420301538.1U patent/CN203929533U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223090A (en) * | 2014-06-09 | 2016-01-06 | 鞍钢股份有限公司 | A kind of automotive sheet FLC curve determination device and method based on DIC technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20200609 |
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| CF01 | Termination of patent right due to non-payment of annual fee |