CN102989854B - Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part - Google Patents
Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part Download PDFInfo
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- CN102989854B CN102989854B CN201210490626.6A CN201210490626A CN102989854B CN 102989854 B CN102989854 B CN 102989854B CN 201210490626 A CN201210490626 A CN 201210490626A CN 102989854 B CN102989854 B CN 102989854B
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- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000003466 welding Methods 0.000 claims description 24
- 238000005498 polishing Methods 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000012938 design process Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The invention discloses a correcting method of misplacement of a flanging angle and unevenness of a flanging face of an automotive L-shaped stamping part. According to the method, a negative angle is avoided in the subsequent correcting by rotating a process angle and reserving a rebounding process remainder, and the right placement and the subsequent correctable property of the flanging angle are guaranteed; and through the improvement of the structure of a die, a workpiece is totally located in a female groove, the flanging face is uniformly stressed in the same direction in the flanging process, and the evenness of the flanging face is guaranteed, so that the precision of the stamping part is guaranteed.
Description
Technical field
The present invention relates to a kind of shaping amelioration method of stamping parts of automobile, specifically, the present invention relates to the amelioration method of the not in place and flange face injustice of a kind of automobile L-type stamping parts flange angle.
Background technology
At present, the L-type stamping parts on automobile need carry out punch process as longeron and small rack etc. in diel.L-type stamping parts in assembling process, because of when the punch process due to flange angle on without the technique anglec of rotation, the flange angle of L-type stamping parts is not in place, causes mating in assembling process excesssive gap, thereby affects welding quality; And the L-type stamping parts after punching press also exists the problem of flange face injustice, because mould structure restriction causes in mould rectification process follow-up weakly, cause the problem of L-type stamping parts flange face injustice to solve.Be illustrated in figure 2 not anglec of rotation stamping parts before, the profile of punching press angle like this and L-type stamping parts is parallel consistent, is unfavorable for overcoming the bounce-back of angle, is unfavorable for when angle has a rebound rectifying and improving simultaneously.
The longeron of L-type structure and small rack, account for the 10%-15% of car load stamping parts quantity, therefore, find a kind of can solve L-type stamping parts flange angle and the method for flange face out-of-flatness problem, to improving rectification efficiency and having great importance die life, in addition, the method also will avoid L-type stamping parts to occur negative angle, as shown in Figure 3.
Summary of the invention
Technical problem to be solved by this invention is to provide the amelioration method of the not in place and flange face injustice of a kind of automobile L-type stamping parts flange angle, and the flange angle that realizes L-type stamping parts puts in place and flange face smooth.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle, in L-type product stamping procedure, the die of mould all comprises the flange face of stamping parts, the working face of the working face of die sidepiece and punch sidepiece is outward-dipping inclined-plane, the working face on die top is the inclined-plane tilting towards die side direction downwards, the working face on punch top is the inclined-plane tilting towards punch side direction downwards, product is rotated on mould to 2 ~ 7 degree, on product, also reserve bounce-back process allowance,
Flange angle after product punching press completes is greater than 90 while spending, the working face of repair welding die sidepiece, and the working face after repair welding requires not have pit and welding slag, surface smoothing; And the working face of the punch sidepiece of polishing, require polishing fairing, and adopt oilstone to push away light, not hole bag;
Flange angle after product punching press completes is less than 90 while spending, the working face of repair welding punch sidepiece, and the working face after repair welding requires not have sand holes and crackle; The working face of polishing die sidepiece, requires not polish vestige, and adopts oilstone to push away light, not hole bag.
After repair welding, having polished, require the gap between punch, die evenly reasonable, the problems such as pulling can not appear in product, old Mao.
In stamping procedure, when punch moves downward, first contact with the plate of stamping parts; Punch continues to move downward, then contacts the R angle of product, and two ends angle is V-shape; Punch continues to move downward, and punch, die are fitted completely, and product is all pushed down, and product flange angle is pressed onto position, and L-type product has been suppressed; The overmolding of L-type product completes, the punch return that moves upward, and because product leaves bounce-back process allowance in die design process, product outwards rebounds, and rebound amount is all eliminated absorption, and stamping parts is qualified.
The anglec of rotation of described product on mould is 7 degree, and on described product, reserved bounce-back process allowance is 2 degree.
Bounce-back process allowance on described product is determined according to the material trademark of product, sheet thickness, product structure and mould structure.
Described punch is identical with the bounce-back process allowance of described product with the size of repair welding with polishing on die.
The present invention adopts technique scheme, and compared with prior art, this method, by rotating technics angle and the reserved bounce-back process allowance of L-type stamping parts are set, makes stamping parts when rectification, avoid the appearance of negative angle, has guaranteed that flange angle puts in place; By improving mould structure, allow stamping parts all in die, allow flange face uniform stressed in turn-up process of stamping parts, guaranteed the flatness of flange face; This method has guaranteed the precision of stamping parts.
Accompanying drawing explanation
Fig. 1 is the structural representation of the diel of the employing in method of the present invention;
Fig. 2 is the structural representation of the diel in background technology;
Fig. 3 is that the structural representation of negative angle appears in the stamping parts in background technology in diel;
Mark in above-mentioned figure is: 1, punch; 2, die.
The specific embodiment
L-type stamping parts on automobile is mainly to rely on moulding process to form out, and flange angle becomes 90 degree or is greater than 90 degree.
The amelioration method of the not in place and flange face injustice of a kind of automobile L-type of the present invention stamping parts flange angle, as shown in Figure 1, in L-type product stamping procedure, the die 2 of mould all comprises the flange face of stamping parts, the working face of the working face of die 2 sidepieces and punch 1 sidepiece is outward-dipping inclined-plane, the working face on die 2 tops is the inclined-plane tilting towards die 2 side direction downwards, the working face on punch 1 top is the inclined-plane tilting towards punch 1 side direction downwards, product is rotated on mould to 2 ~ 7 degree, on product, also reserve bounce-back process allowance, the punching press angle of mould and the profile of product are not parallel like this, when product has a rebound, for angle has been reserved in mould rectification below, flange angle after product punching press completes is greater than 90 while spending, the working face of repair welding die 2 sidepieces, and the working face after repair welding requires not have pit and welding slag, surface smoothing, and the working face of punch 1 sidepiece of polishing, require polishing fairing, and adopt oilstone to push away light, not hole bag, flange angle after product punching press completes is less than 90 while spending, the working face of repair welding punch 1 sidepiece, and the working face after repair welding requires not have sand holes and crackle, the working face of polishing die 2 sidepieces, requires not polish vestige, and adopts oilstone to push away light, not hole bag.
After repair welding, having polished, require the gap between punch 1, die 2 evenly reasonable, the problems such as pulling can not appear in product, old Mao.
In stamping procedure, when punch 1 moves downward, first contact with the plate of stamping parts; Punch 1 continues to move downward, then contacts the R angle of product, and now product is V-shape; Punch 1 continues to move downward, until punch 1, die 2 are fitted completely, product is all pushed down, and product flange angle is pressed onto position, and L-type product has been suppressed; The overmolding of L-type product completes, punch 1 return that moves upward, and because product leaves bounce-back process allowance in die design process, product outwards rebounds, and rebound amount is all eliminated absorption, and stamping parts is qualified.
The anglec of rotation of the product of the present embodiment on mould is 7 degree, and on product, reserved bounce-back process allowance is 2 degree.Bounce-back process allowance on product determines according to the material trademark of product, sheet thickness, product structure and mould structure, and the bounce-back process allowance of different products can be different.And punch 1 is identical with the bounce-back process allowance of described product with the size of repair welding with polishing on die 2.When finding that product outwards rebounds (outside L-type),, by polishing punch 1, repair welding die 2 is rectified and improved mould, and the amount of size of polishing, repair welding is consistent with the rebound amount of needs rectification.Product on mould is without bounce-back, and mould retains present situation, for the wearing and tearing after mould batch production, stays certain rectification surplus, facilitates later period maintenance mould.
The R angle size requirements of L-type stamping parts is reasonable, can not be excessive, otherwise easily produce wrinkling and bounce-back; R angle size can not be too small, otherwise easily produce necking down, cracking.The turning point of L-type stamping parts easily produces material extrusion, requires to open the breach of suitable size, bounce-back and other distortion of to solve material extrusion, producing; On L-type stamping parts, non-important locating hole, can be processed by punching and blanking, and important hole must be first moulding backlash hole.
L-type stamping parts rotates an angle on mould, is mainly to avoid later stage mould to be the situation of 90 degree, as the bounce-back of product angle of arrival, during rectification mould, occurs negative angle, thereby causes the situation that goes wrong and cannot rectify and improve.
The major measure of this amelioration method is as follows:
1, by rotating technics angle and reserved bounce-back process allowance, make rectification below avoid negative angle, guaranteed that flange angle puts in place and the follow-up property rectified and improved;
2, by improving mould structure, allow product all in die 2, allow flange face in turn-up process in same direction uniform stressed, guaranteed the flatness of flange face;
3, by improving Sheet Metal Forming Technology and mould structure, guaranteed the precision of stamping parts.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (6)
1. the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle, it is characterized in that: in L-type product stamping procedure, the die of mould all comprises the flange face of stamping parts, the working face of the working face of die sidepiece and punch sidepiece is outward-dipping inclined-plane, the working face on die top is the inclined-plane tilting towards die side direction downwards, the working face on punch top is the inclined-plane tilting towards punch side direction downwards, product is rotated on mould to 2 ~ 7 degree, on product, also reserve bounce-back process allowance;
Flange angle after product punching press completes is greater than 90 while spending, the working face of repair welding die sidepiece, and the working face after repair welding requires not have pit and welding slag, surface smoothing; And the working face of the punch sidepiece of polishing, require polishing fairing, and adopt oilstone to push away light, not hole bag;
Flange angle after product punching press completes is less than 90 while spending, the working face of repair welding punch sidepiece, and the working face after repair welding requires not have sand holes and crackle; The working face of polishing die sidepiece, requires not polish vestige, and adopts oilstone to push away light, not hole bag.
2. the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle according to claim 1, it is characterized in that: after repair welding, having polished, require the gap between punch, die evenly reasonable, pulling can not appear in product, old Mao problem.
3. the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle according to claim 1, is characterized in that: in stamping procedure, when punch moves downward, first contact with the plate of stamping parts; Punch continues to move downward, then contacts the R angle of product; Punch continues to move downward, and punch, die are fitted completely, and product is all pushed down, and product flange angle is pressed onto position, and L-type product has been suppressed; The overmolding of L-type product completes, the punch return that moves upward, and because product leaves bounce-back process allowance in die design process, product outwards rebounds, and rebound amount is all eliminated absorption, and stamping parts is qualified.
4. the amelioration method of and flange face injustice not in place according to the arbitrary described automobile L-type stamping parts flange angle of claims 1 to 3, is characterized in that: the anglec of rotation of described product on mould is 7 degree, and on described product, reserved bounce-back process allowance is 2 degree.
5. the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle according to claim 4, is characterized in that: the bounce-back process allowance on described product is determined according to the material trademark of product, sheet thickness, product structure and mould structure.
6. the amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle according to claim 5, is characterized in that: described punch is identical with the bounce-back process allowance of described product with the size of repair welding with polishing on die.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490626.6A CN102989854B (en) | 2012-11-27 | 2012-11-27 | Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490626.6A CN102989854B (en) | 2012-11-27 | 2012-11-27 | Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part |
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| CN102989854A CN102989854A (en) | 2013-03-27 |
| CN102989854B true CN102989854B (en) | 2014-10-01 |
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| CN115169161B (en) * | 2022-09-06 | 2022-12-02 | 季华实验室 | Method and device for detecting turned corners and trimmed corners of stamping parts |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0055435A2 (en) * | 1980-12-29 | 1982-07-07 | Ford-Werke Aktiengesellschaft | Method of reducing springback in mechanically pressed sheet materials - II |
| CN101879552A (en) * | 2010-07-06 | 2010-11-10 | 奇瑞汽车股份有限公司 | Stamping and flanging die and method for flanging with die |
| CN102266892A (en) * | 2011-07-15 | 2011-12-07 | 奇瑞汽车股份有限公司 | Turning point improving method for reshaping vehicle longitudinal beam type stamping part and device special for method |
| CN202105919U (en) * | 2011-06-03 | 2012-01-11 | 中国重汽集团济南动力有限公司 | Bending mould of rear cross beam of heavy truck |
| CN102632157A (en) * | 2012-05-04 | 2012-08-15 | 吉林大学 | Crimping and rebounding control method of lateral wall of advanced high-strength steel stamping part |
-
2012
- 2012-11-27 CN CN201210490626.6A patent/CN102989854B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0055435A2 (en) * | 1980-12-29 | 1982-07-07 | Ford-Werke Aktiengesellschaft | Method of reducing springback in mechanically pressed sheet materials - II |
| CN101879552A (en) * | 2010-07-06 | 2010-11-10 | 奇瑞汽车股份有限公司 | Stamping and flanging die and method for flanging with die |
| CN202105919U (en) * | 2011-06-03 | 2012-01-11 | 中国重汽集团济南动力有限公司 | Bending mould of rear cross beam of heavy truck |
| CN102266892A (en) * | 2011-07-15 | 2011-12-07 | 奇瑞汽车股份有限公司 | Turning point improving method for reshaping vehicle longitudinal beam type stamping part and device special for method |
| CN102632157A (en) * | 2012-05-04 | 2012-08-15 | 吉林大学 | Crimping and rebounding control method of lateral wall of advanced high-strength steel stamping part |
Non-Patent Citations (2)
| Title |
|---|
| 浅析前纵梁后加强板回弹的一般整改方法;鲜光斌等;《模具制造》;20101231(第12期);第37-40页 * |
| 鲜光斌等.浅析前纵梁后加强板回弹的一般整改方法.《模具制造》.2010,(第12期), |
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