CN101209476A

CN101209476A - Method for forming part with bigger height difference of shape-face

Info

Publication number: CN101209476A
Application number: CNA2006101703902A
Authority: CN
Inventors: 杨秋莲
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2008-07-02
Anticipated expiration: 2026-12-29
Also published as: CN100574922C

Abstract

The invention relates to a molding method of a part with comparatively larger surface height difference, comprising over-drawing for a panel material, an over drawn part comprises a part body and a round head part, the round head part comprises an edging body connected with the part and an edging end part connected with the edging body; then the round head part is trimmed, and the remained parts, other than the edging body and the edging end part, of the round head part are cut off; finally the edging end part is flanged. As over-drawing is adopted in the molding method, that is, the terminal of the part is drawn by more millimeters during the first step of drawing process, thus forming a comparatively larger terminal part, and effectively avoiding cracking of the edging end part during the drawing process and such problems as partial wrinkles from a folding edge to the body. Then, qualified parts can be molded through subsequent shaping, trimming and flanging process; therefore, the molding method has the advantages of good molding quality and simple technique.

Description

The forming method of the part that a kind of shape face difference in height is bigger

Technical field

The present invention relates to a kind of forming method of part, more particularly, relate to the forming method of the bigger part of a kind of shape face difference in height.

Background technology

Sheet Metal Forming Technology is widely used in the auto manufacturing in recent years, and the many parts in the vehicle all utilize mould to be stamped to form.Along with developing of automobile industry, people are also more and more higher to the requirement of automobile.For satisfying more fashion of automobile, safer, performance is more stable, the more high many requirements of cost performance, auto parts and components to formed automobile integral body are also had higher requirement, show that part shape becomes increasingly complex, overall performance requires more and more higher, and surface quality and dimension precision requirement are more and more tighter etc.

Usually, the most of parts in the vehicle can both a draw forming, however some part because shape and structure is comparatively complicated, comparatively difficulty therefore is shaped also.The part shown in Fig. 1 for example, the flanging 2 that it comprises main body 1 and is positioned at the prying of main body 1 end, the shape face of described main body 1 is low and mild, and flanging 2 places raise suddenly, therefore, the shape face difference in height of part integral body is bigger.This class part is in the process of drawing, because the restriction of material flow behavior, low and to locate drawing depth gently shallow, not only high but also steep flanging place drawing depth is dark, therefore break easily in the end of flanging 2, it is wrinkling then to occur the part from flanging 2 easily to main body 1 transition position, so the Forming Quality of this type of part is relatively poor.

Summary of the invention

The forming method that the purpose of this invention is to provide the part that a kind of Forming Quality is good, the simple shape face of technology difference in height is bigger.

The forming method of the part that shape face difference in height provided by the invention is bigger comprises: plate was drawn, cross and comprise product main body and round end part on the product after drawing, described round end partly comprises flanging main body that links to each other with the product main body and the flanging end that links to each other with the flanging main body; Then described round end is partly carried out deburring, cut the partly last remainder except that flanging main body and flanging end two parts of described round end; At last flange is carried out in described flanging end.

The forming method of the part that shape face difference in height provided by the invention is bigger drew owing to having adopted to cross, promptly in first step drawing operation, with termination Duola's height of product several millimeters, form a bigger round end part, therefore avoided effectively that breaking appears in the flanging end in the drawing process, and local problem such as wrinkling occurred to the main body transition position from flanging.Then, just can mold qualified part by follow-up shaping, deburring and overturning process.Advantages such as therefore, it is good that described forming method has Forming Quality, and technology is simple.

Description of drawings

Fig. 1 is the schematic cross-section of the bigger part of a kind of shape face difference in height;

Fig. 2 is the planar structure schematic diagram of part shown in Figure 1;

When Fig. 3 utilizes forming method moulding provided by the invention part shown in Figure 1 for being illustrated in, finish the schematic partial cross-sectional view of the product after the drawing operation;

When Fig. 4 utilizes forming method moulding provided by the invention part shown in Figure 1 for being illustrated in, finish the schematic partial cross-sectional view of the product behind the trimming;

When Fig. 5 utilizes forming method moulding provided by the invention part shown in Figure 1 for being illustrated in, finish the schematic partial cross-sectional view of the product behind the trimming process step.

The specific embodiment

The moulding of the part that the various shape face differences in height that the forming method of the part that shape face difference in height provided by the invention is bigger is applicable in the vehicle or other occasions are used are bigger.Here, the part that shape face difference in height is bigger can be a part as shown in Figure 1, and this part comprises main body 1 and be positioned at the flanging 2 of the prying of main body 1 end that the difference in height of described flanging 2 and main body 1 is at least 40 millimeters, for example can be the 40-60 millimeter.

Be example only below, in conjunction with the accompanying drawings, forming method of the present invention carried out specific description with the part shown in Fig. 1.

The forming method of the part that shape face difference in height provided by the invention is bigger mainly comprised draw, shaping, deburring and four process of flange.

At first, according to the specific requirement of part shape, plate was drawn.The so-called mistake drawn, be exactly with high several millimeters of the termination Duola of product, for example Duola's height is at least 2 millimeters, as the high 2-8 millimeter of Duola, the preferred high 4-6 millimeter of Duola forms a round end part that circular arc is bigger, like this owing to material in the drawing process flows than being easier to, so can avoid the flanging end to occur breaking, and when shaping round end part, need material many and stop material from flanging to the main body transition position local wrinkling problem that occurred etc. that flows.

Therefore, as shown in Figure 3, comprise product main body 3 and round end part 4 on the product after drawing excessively.The shape of described product main body 3 is decided according to the concrete shape need of part, and is for example consistent with the main body 1 of part among Fig. 1.Described round end part 4 comprises flanging main body 5 that links to each other with product main body 3 and the flanging end 6 that links to each other with flanging main body 5.Wherein, the shape of described flanging main body 5 is decided according to the concrete shape of part, and is for example consistent with most of shaped position of flanging 2 of part among Fig. 1.Described flanging end then also is not molded into final shaped position 6 this moments, and the dotted line among Fig. 3 is represented the final position after 6 moulding of flanging end.

Why to adopt and draw, rather than simply draw, be because as shown in Figure 2, to dig the fillet part shown in a among Fig. 2 during this type of parts flanged-edge, and the fillet at a place is less, so be easy to during flange break, so flanging end 6 can not turn up too highly, and round end part 4 can not be short excessively, otherwise the cutting edge strength that can cause cutting edge is bad, therefore must adopt drawing method with high several millimeters of termination Duola, reduce and draw difficulty, then finish moulding by shaping, deburring etc. again.

Afterwards, described round end part 4 is carried out shaping, reduce the radian of the part at described round end part 4 the above 6 place, flanging end, be beneficial to deburring.As can be seen from Figure 4, through behind this trimming, the last cambered surface of the described round end part 4 at 6 places, described flanging end is trimmed comparatively gently, and radian reduces, and approaches the plane substantially.This is that then mould side cut cutting edge strength is bad, and the poor quality of deburring, therefore, before deburring round end part 4 is carried out shaping and helps to improve the deburring quality because if carry out deburring on the arc surface of certain radian having.The shape before the shaping is represented in double dot dash line among Fig. 4, and solid line is represented the shape after the shaping, and dotted line is represented the final position after 6 moulding of described flanging end.

Should be understood that, if specific requirement according to part shape, for example a place fillet among Fig. 2 is bigger, draw the shape that once to move to after the shaping, and the radian that needs the surface of deburring is not very big, cause trouble can for deburring and follow-up flange, so can save this trimming yet, directly carry out follow-up deburring and flange.

Then, described round end part 4 is carried out deburring, cut the remainder except that flanging main body 5 and flanging end 6 two parts on the described round end part 4, and some other waste material.As shown in Figure 5, the product after the deburring includes only and finishes the product main body 3 and the flanging main body 5 of shaping and go back the flanging end 6 of unshaped to the final position in the first step.Line A-A among Fig. 5 represents the position at trimming line place, and dotted line is represented the final position after 6 moulding of described flanging end.

At last, flange is carried out in described flanging end 6, translate into position shown in dotted lines in Figure 5, thereby finish the moulding of whole part.

Claims

1. the forming method of the part that a shape face difference in height is bigger, it is characterized in that, described forming method comprises: plate was drawn, cross and comprise product main body (3) and round end part (4) on the product after drawing, described round end part (4) comprises flanging main body (5) that links to each other with product main body (3) and the flanging end (6) that links to each other with flanging main body (5); Then described round end part (4) is carried out deburring, cut the upward remainder except that flanging main body (5) and flanging end (6) two parts of described round end part (4); At last flange is carried out in described flanging end (6).

2. forming method according to claim 1, wherein, after plate was carried out drawing, earlier described round end part (4) is carried out shaping, with the radian of the part that reduces described round end part (4) the above place, flanging end (6), and then described round end part (4) carried out deburring.

3. forming method according to claim 1 and 2, wherein, the bigger part of described shape face difference in height comprises main body (1) and is positioned at the flanging (2) of the prying of main body (1) end that the difference in height of described flanging (2) and main body (1) is at least 40 millimeters.

4. forming method according to claim 3 wherein, is compared with the difference in height of main body (1) with flanging (2), and the described drawing operation of crossing is with at least 2 millimeters of termination Duola's height of product.

5. forming method according to claim 4 wherein, is compared with the difference in height of main body (1) with flanging (2), the described high 2-8 millimeter of termination Duola of crossing drawing operation with product.