CN102266892A - Turning point improving method for reshaping vehicle longitudinal beam type stamping part and device special for method - Google Patents

Turning point improving method for reshaping vehicle longitudinal beam type stamping part and device special for method Download PDF

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Publication number
CN102266892A
CN102266892A CN201110198544XA CN201110198544A CN102266892A CN 102266892 A CN102266892 A CN 102266892A CN 201110198544X A CN201110198544X A CN 201110198544XA CN 201110198544 A CN201110198544 A CN 201110198544A CN 102266892 A CN102266892 A CN 102266892A
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angle
punch
die
rectification
flex point
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CN201110198544XA
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CN102266892B (en
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鲜光斌
丁发
赵红伟
胡俊舟
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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 turning point improving method for reshaping a vehicle longitudinal beam type stamping part and a device special for the method, belonging to the stamping field. According to the embodiment of the invention, a second R angle is added in a convex mould in a turning and reshaping process and repairing welding treatment is carried out in corresponding positions of a concave mould, so that the turning point improving method is used under the condition that all procedures of a longitudinal beam can not be used for carrying out lateral shaping through adding tapered wedges. During the use, the concave mould moves downward, and the convex mould is fixed, a flanging insert of the concave mould enables a flanged side of a workpiece to be shrunk inward through an inward-shaping force of turning points at two sides of the U-shaped longitudinal beam, therefore, the whole flanged side is shrunk inwards for preventing from externally rebounding. Thus, no mould mechanism is added in the embodiment of the invention and a stamping process and the newly-added mould are not changed, thus the technical cost is reduced. The turning point improving method has the advantages of high improving speed and remarkable effect; and the quality of the whole vehicle is not influenced by the rebounding of the improved vertical beam.

Description

The shaping of automobile longitudinal girder class stamping parts is with flex point rectification method and isolated plant thereof
Technical field
The present invention relates to a kind of stamping parts shaping rectification method, the shaping of particularly a kind of automobile longitudinal girder class stamping parts is with flex point rectification method and isolated plant thereof.
Background technology
Along with the develop rapidly of auto industry, more and more higher for the product quality requirement of automobile longitudinal girder class stamping parts.Existing automobile longitudinal girder class stamping parts is U type structure, the employing high-strength steel sheet is stamped to form, because high-strength steel sheet self material is thick, drawing depth is dark, automobile longitudinal girder class punching press shape more complicated in addition, the product bounce-back that final punching press is come out is serious, influences the matching effect and the quality of welding spot of body structure, even finally influences complete vehicle quality.
Summary of the invention
Serious in order to overcome the product bounce-back that exists in the above-mentioned prior art, influence the matching effect and the quality of welding spot of body structure, even finally influencing the problem of complete vehicle quality, the embodiment of the invention provides the shaping of a kind of automobile longitudinal girder class stamping parts with flex point rectification method and isolated plant thereof.Described technical scheme is as follows:
The shaping of a kind of automobile longitudinal girder class stamping parts is rectified and improved method with flex point, in U type longeron flanging and restriking operation, under the R angle with described U type longeron bounce-back place corresponding in the punch, and along the downward 5-10 millimeter of product tangential direction, do a R dihedral again and become second R angle, receive in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not hole bag;
With the place, die R angle of corresponding section, described punch position, be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, punch R angle is received in described second R angle, carry out pincers worker after this place's repair welding and handle, require surface smoothing, not the hole bag.
Particularly, after rectification is finished, do not have interference point between described punch and the described die, the gap is even and sizes values is reasonable.
Particularly, the pressing direction after the described flex point of increase is consistent with the pressing direction of described U type longeron flanging and restriking operation in the described punch.
Particularly, when described die adopted Cr12 or Cr12MoV material, described repair welding was the insulation weldering.
Further, described repair welding thickness surpasses 5 millimeters, in described die every 15 millimeters play sunk screw after repair welding again.
Further, after the described repair welding, described die is not heat-treated with case hardness and handle.
The embodiment of the invention also provides a kind of and has been applied to the shaping of described automobile longitudinal girder class stamping parts with the isolated plant in the flex point rectification method, comprise punch and die, the R angle of corresponding described U type longeron bounce-back place is down and along the downward 5-10 millimeter of product tangential direction in the described punch, second R angle is set, receive in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not the hole bag;
With the place, die R angle of corresponding section, described punch position, be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, punch R angle is received in described second R angle, this place's repair welding place requires surface smoothing, not the hole bag.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: the embodiment of the invention is by increasing by second R angle in punch in the flanging and restriking operation, and do repair welding in the relevant position of die and handle, make to add under the situation that wedge carries out the side shaping and use said method at the longeron all process steps, do not increase any mold mechanism, do not change Sheet Metal Forming Technology and increase mould newly, reduced technical costs, and it is fast to have rectification speed, outstanding effect advantage, the longeron after the rectification can not rebound influences complete vehicle quality.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram that punch described in the embodiment of the invention and described die are assembled together;
Fig. 2 is the plane of punch described in the embodiment of the invention;
Fig. 3 is the plane of die described in the embodiment of the invention;
Fig. 4 is the comparison diagram before and after the rectification of product described in the embodiment of the invention.
Among the figure: 1 die, 1.1 flange insert, 1.1 die flex points, 2 punch, 2.1 punch flex points, 3 punch rectification zone, 4 dies rectification zone, 5 product theory states, the actual bounce-back state before the rectification of 6 products, the virtual condition after the rectification of 7 products,
A product the one R angle, B product the 2nd R angle (flex point), the inside debit of C is to, D negative angle, and E is to pressing direction.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Referring to shown in Figure 1, the shaping of the described a kind of automobile longitudinal girder class stamping parts of the embodiment of the invention is rectified and improved method with flex point, mainly be applicable to the longeron class part of U type structure, described longeron class part has flanging and restriking but does not have the mould of side flanging shaping, and must be influence after amplify at the R angle under the situation of entrucking and quality of welding spot to use flex point rectification method of the present invention.Referring to Fig. 1, described flex point rectification method is in U type longeron flanging and restriking operation, under the R angle with described U type longeron bounce-back place corresponding in the punch 2, be punch rectification zone 3 (referring to Fig. 2), and, do a R dihedral again and become second R angle (being punch flex point 2.1 places) along the downward 5-10 millimeter of product tangential direction, receive in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not the hole bag; Wherein, in the reality rectification, the size at flex point R angle is generally 5 millimeters sizes, as it is serious to rebound, and sheet thickness is thick, need determine the size at R angle according to actual conditions, and flex point R angle is possibly greater than 5 millimeters;
Referring to Fig. 1, place, R angle with the die 1 of corresponding section, described punch 2 position, be die rectification zone 4 (referring to Fig. 3), be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, the R angle of punch 2 is received in described second R angle, carry out pincers worker after this place's repair welding and handle, require surface smoothing, not the hole bag.
Referring to Fig. 1, principle of the present invention is: during work, die 1 part moves downward, punch 2 parts are motionless, and under the effect of punch flex point 2.1 and die 1 flex point, the flange insert 1.1 of die 1 is by the effect of the strength of the inside shaping of flex point on U type longeron both sides, the flange of product is inwardly received, thereby force whole flange inwardly to be received, the containment flange outwards rebounds, and makes end article reach the state of actual needs in the coupling.
Particularly, the rectification finish after, do not have interference point between described punch 2 and the described die 1, the gap is even and sizes values is reasonable, make product do not have wrinkling with weigh wounded.
Particularly, the pressing direction in the described punch 2 after the described flex point of increase is consistent with the pressing direction of described U type longeron flanging and restriking operation, has guaranteed that product influences the punching press effect.
Particularly, when described die 1 adopted Cr12 or Cr12MoV material, described repair welding was the insulation weldering, had avoided the cracking of mould.
Further, described repair welding thickness is above 5 millimeters, requirement is taken measures on customs clearance and is guaranteed not come off in institute's welding portion production process, specifically in described die 1 every 15 millimeters play sunk screw after repair welding again, welded in the part producing process and do not come off to guarantee to weld the back.
Further, after the described repair welding, described die 1 is not heat-treated with case hardness and handle, avoid to cause repair welding partly to ftracture and come off.
As shown in Figure 4, dotted line is represented product theory state 5 among the figure, the actual bounce-back state 6 before the product rectification is represented in double dot dash line, heavy line is represented the virtual condition 7 after the product rectification, and wherein, A is product the one R angle, B is product the 2nd R angle (flex point), C to be interior debit to, D is a negative angle, E is to being pressing direction.
The U type actinal surface of rectification floor side member might be because the effect of flex point B forms a negative angle D, the bounce-back of about two millimeters, flange face after the rectification might be pressed close to the data theory state like this, thereby rebound amount is controlled within the millimeter, can improve the bounce-back of product greatly.
As shown in Figure 1, the embodiment of the invention also provides a kind of and has been applied to the shaping of described automobile longitudinal girder class stamping parts with the isolated plant in the flex point rectification method, comprise punch 2 and die 1, the R angle of corresponding described U type longeron bounce-back place is down and along the downward 5-10 millimeter of product tangential direction in the described punch 2, second R angle is set, receives in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not hole bag;
With the place, die 1R angle of corresponding section, described punch 2 position, be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, the R angle of punch 2 is received in described second R angle, this place's repair welding place requires surface smoothing, not the hole bag.
The embodiment of the invention is by increasing by second R angle in punch 2 in the flanging and restriking operation, and do repair welding in the relevant position of die 1 and handle, make to add under the situation that wedge carries out the side shaping and use said method at the longeron all process steps, do not increase any mold mechanism, do not change Sheet Metal Forming Technology and increase mould newly, reduced technical costs, and it is fast to have rectification speed, outstanding effect advantage, the longeron after the rectification can not rebound influences complete vehicle quality.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. automobile longitudinal girder class stamping parts shaping is rectified and improved method with flex point, it is characterized in that, in U type longeron flanging and restriking operation, under the R angle with described U type longeron bounce-back place corresponding in the punch, and, do a R dihedral again and become second R angle along the downward 5-10 millimeter of product tangential direction, receive in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not the hole bag;
With the place, die R angle of corresponding section, described punch position, be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, punch R angle is received in described second R angle, carry out pincers worker after this place's repair welding and handle, require surface smoothing, not the hole bag.
2. flex point rectification method as claimed in claim 1 is characterized in that, after rectification is finished, does not have interference point between described punch and the described die, and the gap is even and sizes values is reasonable.
3. flex point rectification method as claimed in claim 1 is characterized in that, the pressing direction in the described punch after the described flex point of increase is consistent with the pressing direction of described U type longeron flanging and restriking operation.
4. as the described flex point of each claim of claim 1-3 rectification method, it is characterized in that when described die adopted Cr12 or Cr12MoV material, described repair welding was the insulation weldering.
5. flex point rectification method as claimed in claim 4 is characterized in that, described repair welding thickness surpasses 5 millimeters, in described die every 15 millimeters play sunk screw after repair welding again.
6. flex point rectification method as claimed in claim 5 is characterized in that, after the described repair welding, described die is not heat-treated with case hardness and handles.
7. be applied to the shaping of the described automobile longitudinal girder class of claim 1 stamping parts with the isolated plant in the flex point rectification method, comprise punch and die, it is characterized in that, the R angle of corresponding described U type longeron bounce-back place is down and along the downward 5-10 millimeter of product tangential direction in the described punch, second R angle is set, receives in the U type mouth of described second the described U type of R angle longeron, described second R angle makes by machining, and surface smoothing, not hole bag;
With the place, die R angle of corresponding section, described punch position, be directed downwards the 5-10 millimeter along described product bounce-back and carry out repair welding, punch R angle is received in described second R angle, this place's repair welding place requires surface smoothing, not the hole bag.
CN201110198544.XA 2011-07-15 2011-07-15 Turning point improving method for reshaping vehicle longitudinal beam type stamping part and device special for method Active CN102266892B (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN102896247A (en) * 2012-09-17 2013-01-30 芜湖世达模具有限公司 Embedding type workpiece fixing device for blank stamping
CN102989854A (en) * 2012-11-27 2013-03-27 奇瑞汽车股份有限公司 Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part
CN103418656A (en) * 2013-08-16 2013-12-04 亿森(上海)模具有限公司 Method for stamping automobile beam piece
CN103464577A (en) * 2012-06-06 2013-12-25 奇瑞汽车股份有限公司 Method for manufacturing S-shaped longitudinal beam of automobile
CN107824636A (en) * 2017-12-13 2018-03-23 高密市豪沃机械科技有限公司 Car U-shaped beam class sheet metal component shaping methods

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CN101856693A (en) * 2010-05-25 2010-10-13 李义 Moving die compressive stress decomposing and forming method, volume spring and U-shaped bolt composite bending die

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN103464577A (en) * 2012-06-06 2013-12-25 奇瑞汽车股份有限公司 Method for manufacturing S-shaped longitudinal beam of automobile
CN103464577B (en) * 2012-06-06 2016-01-27 奇瑞汽车股份有限公司 The manufacture method of automobile " S " type longeron
CN102896247A (en) * 2012-09-17 2013-01-30 芜湖世达模具有限公司 Embedding type workpiece fixing device for blank stamping
CN102989854A (en) * 2012-11-27 2013-03-27 奇瑞汽车股份有限公司 Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part
CN102989854B (en) * 2012-11-27 2014-10-01 奇瑞汽车股份有限公司 Correcting method of misplacement of flanging angle and unevenness of flanging face of automotive L-shaped stamping part
CN103418656A (en) * 2013-08-16 2013-12-04 亿森(上海)模具有限公司 Method for stamping automobile beam piece
CN107824636A (en) * 2017-12-13 2018-03-23 高密市豪沃机械科技有限公司 Car U-shaped beam class sheet metal component shaping methods
CN107824636B (en) * 2017-12-13 2019-12-03 高密市豪沃机械科技有限公司 Car U-shaped beam class sheet metal component shaping methods

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