CN102989854A - 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 PDF

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Publication number
CN102989854A
CN102989854A CN2012104906266A CN201210490626A CN102989854A CN 102989854 A CN102989854 A CN 102989854A CN 2012104906266 A CN2012104906266 A CN 2012104906266A CN 201210490626 A CN201210490626 A CN 201210490626A CN 102989854 A CN102989854 A CN 102989854A
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flange
punch
die
working
angle
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CN2012104906266A
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CN102989854B (en
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鲜光斌
罗琳
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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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

The amelioration method of the not in place and flange face injustice of automobile L-type stamping parts flange angle
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, L-type stamping parts such as the need such as longeron and small rack on the automobile carry out punch process in diel.The L-type stamping parts in assembling process, because of when the punch process because on the flange angle without the technique anglec of rotation, the flange angle of L-type stamping parts is not in place, causes mating excesssive gap in the assembling process, thereby affects welding quality; And also there is the problem of flange face injustice in the L-type stamping parts after the punching press, because mould structure restriction causes in the mould rectification process follow-up weakly, causes the problem of L-type stamping parts flange face injustice to solve.Be illustrated in figure 2 as not anglec of rotation stamping parts before, like this punching press angle is parallel with the profile of L-type stamping parts consistent, is unfavorable for overcoming the bounce-back of angle, is unfavorable for simultaneously rectifying and improving when angle has a rebound.
The longeron of L-type structure and small rack, account for the 10%-15% of car load stamping parts quantity, therefore, seek a kind of can solve the L-type stamping parts the flange angle and the method for flange face out-of-flatness problem, to improving rectification efficient and having great importance die life, in addition, the method also will avoid the L-type stamping parts negative angle to occur, as shown in Figure 3.
Summary of the invention
Technical problem to be solved by this invention provides 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 the 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 the 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 downward inclined-plane that tilts towards the die side direction, the working face on punch top is the downward inclined-plane that tilts towards the punch side direction, product is rotated 2 ~ 7 degree at mould, also reserve the bounce-back process allowance on the product;
When the flange angle after the product punching press is finished is spent greater than 90, the working face of repair welding die sidepiece, the working face after the repair welding requires not have pit and welding slag, surface smoothing; And the working face of polishing punch sidepiece, require the polishing fairing, and adopt oilstone to push away light, not the hole bag;
When the flange angle after the product punching press is finished is spent less than 90, the working face of repair welding punch sidepiece, the working face after the 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 the hole bag.
After repair welding, polishing are finished, require the gap between punch, the die evenly reasonable, the problems such as pulling can not appear in product, old Mao.
In stamping procedure, when punch moves downward, at first contact with the plate of stamping parts; Punch continues to move downward, and contacts the R angle of product again, and the two ends angle is V-shape; Punch continues to move downward, and punch, die are fitted fully, and product is all pushed down, and product flange angle is pressed onto the position, and the compacting of L-type product is finished; The overmolding of L-type product is finished, the punch return that moves upward, because product leaves the 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 reserving the bounce-back process allowance on the described product is 2 degree.
Bounce-back process allowance on the described product is determined according to material trademark, sheet thickness, product structure and the mould structure of product.
Polishing is identical with the bounce-back process allowance of described product with the size of repair welding on described punch and the die.
The present invention adopts technique scheme, and compared with prior art, rotating technics angle and the reservation bounce-back process allowance of this method by the L-type stamping parts is set makes stamping parts avoid the appearance of negative angle when rectification, guaranteed that the 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.
Description of drawings
Fig. 1 is the structural representation of the diel of the employing in the method for the present invention;
Fig. 2 is the structural representation of the diel in the background technology;
Fig. 3 is negative angle appears in the stamping parts in the background technology in diel structural representation;
Mark among the above-mentioned figure is: 1, punch; 2, die.
The specific embodiment
L-type stamping parts on the automobile mainly is to rely on moulding process to form out, and the flange angle becomes 90 degree or spends greater than 90.
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 the 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 downward inclined-plane that tilts towards die 2 side direction, the working face on punch 1 top is the downward inclined-plane that tilts towards punch 1 side direction, product is rotated 2 ~ 7 degree at mould, also reserve the bounce-back process allowance on the product, the profile of the punching press angle of mould and product is not parallel like this, when product has a rebound, for angle has been reserved in mould rectification in back; When the flange angle after the product punching press is finished is spent greater than 90, the working face of repair welding die 2 sidepieces, the working face after the repair welding requires not have pit and welding slag, surface smoothing; And the working face of polishing punch 1 sidepiece, require the polishing fairing, and adopt oilstone to push away light, not the hole bag; When the flange angle after the product punching press is finished is spent less than 90, the working face of repair welding punch 1 sidepiece, the working face after the 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 the hole bag.
After repair welding, polishing are finished, require the gap between punch 1, the die 2 evenly reasonable, the problems such as pulling can not appear in product, old Mao.
In stamping procedure, when punch 1 moves downward, at first contact with the plate of stamping parts; Punch 1 continues to move downward, and contacts the R angle of product again, and this moment, product was V-shape; Punch 1 continues to move downward, until punch 1, die 2 are fitted fully, product is all pushed down, and product flange angle is pressed onto the position, and the compacting of L-type product is finished; The overmolding of L-type product is finished, punch 1 return that moves upward, because product leaves the 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 present embodiment on mould is 7 degree, and reserving the bounce-back process allowance on the product is 2 degree.Bounce-back process allowance on the product determines that according to material trademark, sheet thickness, product structure and the mould structure of product the bounce-back process allowance of different products can be different.And polishing is identical with the bounce-back process allowance of described product with the size of repair welding on punch 1 and the die 2.When finding that product outwards rebounds (outside the L-type), then 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 then mould keeps present situation, stays certain rectification surplus for the wearing and tearing after the mould batch production, makes things convenient for the later period maintenance mould.
The R angle size requirements of L-type stamping parts is reasonable, can not be excessive, otherwise produce easily wrinkling and bounce-back; R angle size can not be too small, otherwise produce easily necking down, cracking.The turning point of L-type stamping parts produces material extrusion easily, requires to open the breach of suitable size, bounce-back and other distortion of producing to solve material extrusion; Non-important locating hole can be processed by punching and blanking on the L-type stamping parts, and important hole must be first moulding backlash hole.
The L-type stamping parts mainly is to avoid the later stage mould to be the situations of 90 degree in angle of mould rotation, such as the bounce-back of product angle of arrival, negative angle occurs during the rectification mould, thereby causes the situation that goes wrong and can't rectify and improve.
The major measure of this amelioration method is as follows:
1, by rotating technics angle and reservation bounce-back process allowance, makes the back rectification avoid negative angle, guaranteed that the 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 the flange face in turn-up process on 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.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; 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 the 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 downward inclined-plane that tilts towards the die side direction, the working face on punch top is the downward inclined-plane that tilts towards the punch side direction, product is rotated 2 ~ 7 degree at mould, also reserve the bounce-back process allowance on the product;
When the flange angle after the product punching press is finished is spent greater than 90, the working face of repair welding die sidepiece, the working face after the repair welding requires not have pit and welding slag, surface smoothing; And the working face of polishing punch sidepiece, require the polishing fairing, and adopt oilstone to push away light, not the hole bag;
When the flange angle after the product punching press is finished is spent less than 90, the working face of repair welding punch sidepiece, the working face after the 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 the 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, polishing are finished, require the gap between punch, the die evenly reasonable, the problems such as pulling can not appear in product, old Mao.
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, at first contact with the plate of stamping parts; Punch continues to move downward, and contacts the R angle of product again; Punch continues to move downward, and punch, die are fitted fully, and product is all pushed down, and product flange angle is pressed onto the position, and the compacting of L-type product is finished; The overmolding of L-type product is finished, the punch return that moves upward, because product leaves the 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 to 3 arbitrary described automobile L-type stamping parts flange angles according to claim 1, it is characterized in that: the anglec of rotation of described product on mould is 7 degree, reserving the bounce-back process allowance on the described product 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, it is characterized in that: the bounce-back process allowance on the described product is determined according to material trademark, sheet thickness, product structure and the mould structure of product.
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: polishing is identical with the bounce-back process allowance of described product with the size of repair welding on described punch and the die.
CN201210490626.6A 2012-11-27 2012-11-27 Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part Active CN102989854B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 (1)

* Cited by examiner, † Cited by third party
Title
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》 *

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