CN101920285B - One-step deep drawing forming process method for oil tank half-shell workpiece - Google Patents
One-step deep drawing forming process method for oil tank half-shell workpiece Download PDFInfo
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- CN101920285B CN101920285B CN2010101951025A CN201010195102A CN101920285B CN 101920285 B CN101920285 B CN 101920285B CN 2010101951025 A CN2010101951025 A CN 2010101951025A CN 201010195102 A CN201010195102 A CN 201010195102A CN 101920285 B CN101920285 B CN 101920285B
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- gabarit
- oil tank
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000011230 binding agent Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000007306 turnover Effects 0.000 claims description 5
- 238000007792 addition Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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Abstract
The invention discloses a process method for one-step deep drawing forming of a workpiece with a half shell of an oil tank, which can be used for one-step deep drawing forming of a deep-drawing workpiece with the characteristics of flange high box-shaped parts, complex curved surface parts and complex covering parts which are processed by at least two times according to a conventional forming process method. According to the invention, by changing the deep drawing direction, changing the position of the deep drawing rib, changing the design of the pressing surface and the like, only one set of die is needed to be designed, so that the material is prevented from being repeatedly distorted and wrinkled when the pressing is started, and the die has a reasonable structure, so that the material flows smoothly in the deep drawing process, and a workpiece is formed by one-time drawing. The workpiece drawn by the drawing method has smooth surface and the wall thickness thinning degree is also in an allowable range, thereby meeting the requirements of products.
Description
[technical field]
The present invention relates to a kind of pull and stretch workpiece drawing and forming process, relate in particular to a kind of can with need by conventional moulding technique processing at least twice could drawing and forming the process of pull and stretch workpiece once drawing and forming of flanged high box part, complex-curved type of part, complicated covering shaping characteristic.
[background technology]
As shown in Figure 1; It is a kind of right side half housing of fuel tank; Metal plate material thickness is merely 0.5mm, and faying face is three-dimensional many turnover curved surfaces, and corner pull and stretch height is high, product sidewall corner R is less, f is bigger for the flange radius R; Top r is less, near the convexity that the end face of corner is not only sharply sharp-pointed, but also narrower, darker depression arranged.This workpiece has the shaping characteristic and the difficulty of flanged high box part, complex-curved class part, complicated covering simultaneously.
The conventional moulding technique of this type pull and stretch workpiece is: 1. computation of table lookup number of drawing, pull and stretch workpiece shown in Figure 1 need secondary deep-drawing to be shaped, and add trimming again one; 2. draft the secondary deep-drawing forming technology; 3. select the direction of binder surface; 4. the design of binder surface.
Make pull and stretch workpiece shown in Figure 1 according to conventional moulding technique; Have following shortcoming: the secondary deep-drawing forming technology is complicated; Need forward and backward, left and right continuation, the curved surface return portion is carried out rounding said curve surface of workpiece court, or with replenishing boundary surface after the return portion cut-out again.
The utilization CAD can verify clearly that conventional moulding technique makes the shortcoming that said workpiece exists.
Can learn through analyzing: the binder surface that conventional method generates, its minimal gaussian curvature is-0.0554, maximum gaussian curvature is 0.0196 (size of the absolute value representation binder surface curvature of Gaussian curvature, sign is represented bending direction).
Analysis result shows: there is rapid curved surface turnover in the binder surface that conventional method generates; Material will twist in beginning in the pull and stretch stage, wrinkling, for this reason, when producing, have to strengthen pressure-pad-force and carry out wrinkle-chasing; But in pull and stretch subsequently; Distortion can rest on the surface of the work with wrinkling blank and can not complete obiteration, and material can be difficult for mobilely by the binder surface of abrupt turn " pinnings ", makes that material is more difficult and causes workpiece by drawing crack through binder surface.So conventional moulding process needs at least two molds, but also be prone to distortion, wrinkling, even, can not satisfy the production needs by drawing crack.
[summary of the invention]
For overcoming shortcoming according to the common process method; The present invention proposes a kind of process of once drawing and forming semi-shell workpiece of oil tank, with process processing of the present invention similar pull and stretch workpiece shown in Figure 1, workpiece is once pulled into; And material can not produce distortion, wrinkling repeatedly yet; Binder surface is local smooth smooth-going, and wall thickness attenuation degree also in allowed limits, reached requirement of products.
The present invention is through adopting following technical scheme to realize:
Implement the process of once drawing and forming semi-shell workpiece of oil tank, said process comprises step:
1.. semi-shell workpiece of oil tank is decomposed into top, top and sidewall fillet part, side wall portion, sidewall and flange fillet part, five parts of flange part; Calculate the area of five parts respectively; With five part area additions; Draw the gross area,, obtain blank and launch gabarit then according to the gross area with according to top gabarit shape blowing;
2.. the edge line that launches gabarit with said blank is a benchmark, outwards opens up along the edge line border and prolongs 10mm, but obtain cutting blank gabarit;
But 3.. determine blank according to said cutting blank gabarit;
4.. the edge of blank is further pruned, removed sudden change and wedge angle, make the smooth smoothness of edge line of blank, form actual blank gabarit; It is 8mm that the edge line of actual blank gabarit and said blank launch the gabarit distance;
5.. with the edge line of said actual blank gabarit, be subdivided into a plurality of points, make these points form a closed curve; Utilize said closed curve and blank to launch gabarit and set up compound curved surface;
6.. make the CAD pull and stretch workpiece 3D archetype that blank launches gabarit, confirm that according to the purpose of once drawing pull and stretch workpiece 3D archetype along X axle rotation 3.15 degree, is drawing direction along Y axle rotation 2.15 degree;
7.. according to the pull and stretch workpiece 3D archetype of once drawing and forming, confirm that respectively actual production is with punch, die entrance size, sidewall slope direction or angle; And make and produce with punch, die;
8.. according to the workpiece 3D archetype of once drawing and forming, confirm blank holder or drawbead;
9.. carry out the pull and stretch of semi-shell workpiece of oil tank.
The 7. described workpiece 3D archetype of step according to once drawing and forming; Make in the process of producing with punch, die; Check the Gaussian curvature of the 3D model binder surface of said pull and stretch workpiece, find out the point coordinates or the line at rapid curved surface turnover position, revise the form of producing with punch, die.
Step 8. in really in the process of level pressure flange or drawbead, the shape according to compound curved surface and workpiece is arranged in drawbead on the blank holder, and sets up the curved surface drawbead of epirelief in sidewall and flange fillet part and position, flange part junction.
Moulding technique of the present invention; The actual production that utilizes CAD to accomplish said type sheet metal work launch with stock or actual production with the structure of cupping tool or actual production manufactured size with cupping tool; Realize once drawing and forming; Have that cost is low, efficient is high, convenient, reliable, safe advantage.
[description of drawings]
Fig. 1 is the sketch map of fuel tank half housing that pulls into of the process with once drawing and forming semi-shell workpiece of oil tank of the present invention;
Fig. 2 is the sketch map that blank launches gabarit in the process of once drawing and forming semi-shell workpiece of oil tank of the present invention;
Fig. 3 is the sketch map of actual blank gabarit in the process of once drawing and forming semi-shell workpiece of oil tank of the present invention.
[specific embodiment]
Principle for the process that further specifies once drawing and forming semi-shell workpiece of oil tank according to the invention; Combine accompanying drawing 1, Fig. 2, fuel tank shown in Figure 3 half housing workpiece at present; Preferred embodiment to drawing and forming process according to the invention is elaborated; Yet said instance is merely the usefulness that furnishes an explanation and explain, can not be used for limiting scope of patent protection of the present invention.
According to semi-shell workpiece of oil tank shown in Figure 1, implement a kind of process of once drawing and forming semi-shell workpiece of oil tank, said process comprises step:
1.. semi-shell workpiece of oil tank is decomposed into top 10, top and sidewall fillet part 20, side wall portion 30, sidewall and flange fillet part 40,50 5 parts of flange part; Calculate the area of five parts respectively; With five part area additions; Draw the gross area,, obtain blank and launch gabarit 11 then according to the gross area with according to top 10 gabarit shape blowings;
2.. the edge line that launches gabarit with said blank is a benchmark, outwards opens up along the edge line border and prolongs 10mm, but obtain cutting blank gabarit 12;
But 3.. determine blank 13 according to said cutting blank gabarit 12;
4.. the edge of blank 13 is further pruned, as shown in Figure 3, remove sudden change and wedge angle, make the smooth smoothness of edge line of blank 13, form actual blank gabarit 14; It is 8mm that the edge line of actual blank gabarit 14 and said blank launch gabarit 11 distances;
5.. with the edge line of said actual blank gabarit 14, be subdivided into a plurality of points, make these points form a closed curve; Utilize said closed curve and blank to launch gabarit 11 and set up compound curved surface;
6.. make the CAD pull and stretch workpiece 3D archetype that blank launches gabarit 11, confirm that according to the purpose of once drawing pull and stretch workpiece 3D archetype along X axle rotation 3.15 degree, is drawing direction along Y axle rotation 2.15 degree;
7.. according to the pull and stretch workpiece 3D archetype of once drawing and forming, confirm that respectively actual production is with punch, die entrance size, sidewall slope direction or angle; And make and produce with punch, die;
8.. according to the workpiece 3D archetype of once drawing and forming, confirm blank holder or drawbead;
9.. carry out the pull and stretch of semi-shell workpiece of oil tank.
The 7. described workpiece 3D archetype of step according to once drawing and forming; Make in the process of producing with punch, die; Check the Gaussian curvature of the 3D model binder surface of said pull and stretch workpiece, find out the point coordinates or the line at rapid curved surface turnover position, revise the form of producing with punch, die.
Step 8. in really in the process of level pressure flange or drawbead, the shape according to compound curved surface and workpiece is arranged in drawbead on the blank holder, and sets up the curved surface drawbead of epirelief in sidewall and flange fillet part 40 and position, flange part 50 junction.
Through the actual production checking, produce semi-shell workpiece of oil tank shown in Figure 1 according to pull and stretch workpiece drawing and forming process according to the invention, material is also not distortion, wrinkling repeatedly when the beginning binder; In pull and stretch, because cooperating of pull and stretch die and blank holder curved surface and drawbead effectively reduced pressure-pad-force; Increased and help the pull and stretch resistance that pull and stretch carries out, workpiece once pulls into, smooth surface; Wall thickness attenuation degree has reached the designing requirement of product also in allowed limits.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (3)
1. the process of once drawing and forming semi-shell workpiece of oil tank is characterized in that, said process comprises step:
1.. semi-shell workpiece of oil tank is decomposed into top (10), top and sidewall fillet part (20), side wall portion (30), sidewall and flange fillet part (40), (50) five parts of flange part; Calculate the area of five parts respectively; With five part area additions; Draw the gross area,, obtain blank and launch gabarit (11) then according to the gross area with according to top (10) gabarit shape blowing;
2.. the edge line that launches gabarit with said blank is a benchmark, outwards opens up along the edge line border and prolongs 10mm, but obtain cutting blank gabarit (12);
But 3.. determine blank (13) according to said cutting blank gabarit (12);
4.. the edge of blank (13) is further pruned, removed sudden change and wedge angle, make the smooth smoothness of edge line of blank (13), form actual blank gabarit (14); It is 8mm that the edge line of actual blank gabarit (14) and said blank launch gabarit (11) distance;
5.. with the edge line of said actual blank gabarit (14), be subdivided into a plurality of points, make these points form a closed curve; Utilize said closed curve and blank to launch gabarit (11) and set up compound curved surface;
6.. make the CAD pull and stretch workpiece 3D archetype that blank launches gabarit (11), confirm that according to the purpose of once drawing pull and stretch workpiece 3D archetype along X axle rotation 3.15 degree, is drawing direction along Y axle rotation 2.15 degree;
7.. according to the pull and stretch workpiece 3D archetype of once drawing and forming, confirm that respectively actual production is with punch, die entrance size, sidewall slope direction or angle; And make and produce with punch, die;
8.. according to the workpiece 3D archetype of once drawing and forming, confirm blank holder or drawbead;
9.. carry out the pull and stretch of semi-shell workpiece of oil tank.
2. the process of once drawing and forming semi-shell workpiece of oil tank according to claim 1 is characterized in that:
The 7. described workpiece 3D archetype of step according to once drawing and forming; Make in the process of producing with punch, die; Check the Gaussian curvature of the 3D model binder surface of said pull and stretch workpiece, find out the point coordinates or the line at rapid curved surface turnover position, revise the form of producing with punch, die.
3. the process of once drawing and forming semi-shell workpiece of oil tank according to claim 1 is characterized in that:
Step 8. in really in the process of level pressure flange or drawbead, the shape according to compound curved surface and workpiece is arranged in drawbead on the blank holder, and sets up the curved surface drawbead of epirelief in sidewall and flange fillet part (40) and flange part (50) position, junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101951025A CN101920285B (en) | 2010-06-08 | 2010-06-08 | One-step deep drawing forming process method for oil tank half-shell workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101951025A CN101920285B (en) | 2010-06-08 | 2010-06-08 | One-step deep drawing forming process method for oil tank half-shell workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101920285A CN101920285A (en) | 2010-12-22 |
| CN101920285B true CN101920285B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101951025A Expired - Fee Related CN101920285B (en) | 2010-06-08 | 2010-06-08 | One-step deep drawing forming process method for oil tank half-shell workpiece |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163689B (en) * | 2014-04-11 | 2018-09-07 | 新日铁住金株式会社 | The manufacturing method and automobile underarm of manufacturing press-molded products |
| CN106391811A (en) * | 2016-10-08 | 2017-02-15 | 上海维衡精密电子股份有限公司 | Drawing process |
| CN114309221A (en) * | 2021-12-20 | 2022-04-12 | 滁州市艾德模具设备有限公司 | Controlled torsional springback structure for deep-drawn products |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042099A (en) * | 1989-11-06 | 1990-05-16 | 李连济 | Set for supper-deep thin shell integral forming method and mould |
| CN2235151Y (en) * | 1995-03-30 | 1996-09-11 | 西安变压器厂 | Transformer oil reservoir press-moulding die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2590814B1 (en) * | 1985-12-04 | 1988-02-26 | Usinor | METHOD AND DEVICE FOR SCRAPPING LOW ELONGATION SHEETS |
-
2010
- 2010-06-08 CN CN2010101951025A patent/CN101920285B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042099A (en) * | 1989-11-06 | 1990-05-16 | 李连济 | Set for supper-deep thin shell integral forming method and mould |
| CN2235151Y (en) * | 1995-03-30 | 1996-09-11 | 西安变压器厂 | Transformer oil reservoir press-moulding die |
Non-Patent Citations (2)
| Title |
|---|
| JP昭62-134122A 1987.06.17 |
| 张国强等."摩托车油箱成形过程重的虚拟制造技术".《CAD/CAM与制造业信息化》.2003,(第6期),69-71. |
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| Publication number | Publication date |
|---|---|
| CN101920285A (en) | 2010-12-22 |
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Granted publication date: 20120523 Termination date: 20170608 |