CN216937992U

CN216937992U - Drawing die for side wall outer plate

Info

Publication number: CN216937992U
Application number: CN202123343913.8U
Authority: CN
Inventors: 彭晓龙; 刘国伟; 黄亮
Original assignee: Shanghai Superior Die Technology Co Ltd
Current assignee: Shanghai Superior Die Technology Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-12
Anticipated expiration: 2031-12-28

Abstract

The utility model provides a drawing die for a side wall outer plate, which comprises an upper female die and a lower male die, wherein a compensation blank holder is arranged on the upper female die, an inner pressure edge ring matched with the compensation blank holder is embedded in the inner side of the lower male die, and an outer pressure edge ring for positioning a plate together with the inner pressure edge ring is arranged on the outer side of the lower male die; the side wall outer plate is provided with an A column, and the outer edge of the A column comprises a first straight edge, a second straight edge and a round corner edge for connecting the first straight edge and the second straight edge; a first groove, a second groove and a third groove are sequentially arranged on the external pressure edge ring from inside to outside, and all the grooves are positioned on the outer side of the A column; the first groove and the second groove are groove-following grooves, the third groove comprises a groove A and a groove B, and the groove A and the groove B form a splayed groove; by additionally arranging the splayed draw bead, the transverse tensile stress is increased, so that the generated longitudinal corrugation is transversely stretched, and the wrinkling of a pressing surface is reduced or avoided, so that the upper female die can be completely attached to the external pressing edge ring, the instability of plate drawing is avoided, and the drawing quality is improved.

Description

Drawing die for side wall outer plate

Technical Field

The utility model belongs to the technical field of forming dies, and particularly relates to a drawing die for a side wall outer plate.

Background

The automobile side wall is the most complex covering part of an automobile body, the appearance of the side wall directly influences the appearance quality of the whole automobile, and the drawing forming of the side wall outer plate is of great importance to the appearance quality of the automobile body. The side wall outer plate has the characteristics of large overall dimension, complex shape (mostly three-dimensional curved surface) and deep drawing depth, and the sheet material has uneven inflow speed in the drawing process, so that the blank holder ring is easy to wrinkle; particularly at the corner area position of the A column, the corrugation on the side wall blank holder can influence the inflow amount of drawing, thereby influencing the local quality and stability of the product; in addition, through a long-term stamping process, the wrinkling part of the blank holder can be seriously abraded, and the service life of the die is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages of the prior art, the present invention aims to provide a side wall outer plate drawing die, a side wall outer plate and an automobile, wherein a third draw bead shaped like a Chinese character 'ba' is additionally arranged between an outer blank holder and an upper female die, so that a transverse tensile stress is further increased, and thus, a longitudinal corrugation passing through the third draw bead is transversely stretched, so as to reduce a longitudinal wrinkle generated in a material inflow direction, so that the upper female die can be completely attached to an outer blank holder, and the problem of wrinkling of the outer blank holder caused by uneven flow velocity in an a column region of the side wall outer plate is effectively solved.

In order to achieve the above and other related purposes, the utility model provides a side wall outer plate drawing die, which comprises an upper female die and a lower male die matched with the upper female die, wherein a compensation blank holder is arranged on the upper female die, an inner pressure blank holder matched with the compensation blank holder is embedded in the inner side of the lower male die, and an outer pressure blank holder for positioning plates together with the inner pressure blank holder is arranged on the outer side of the lower male die; the side wall outer plate is provided with an A column, and the outer edge of the A column comprises a first straight edge, a second straight edge and a round corner edge for connecting the first straight edge and the second straight edge; a first groove, a second groove and a third groove are sequentially arranged on the outer pressing edge ring from inside to outside, and the first groove, the second groove and the third groove are all positioned on the outer side of the A column; the first groove and the second groove are groove-following grooves, the third groove comprises a groove A and a groove B which are separately arranged, and the groove A and the groove B are arranged in a crossed manner to form a splayed groove; the upper female die is provided with a first convex rib matched with the first groove, a second convex rib matched with the second groove and a third convex rib matched with the third groove; the first groove and the first convex rib jointly form a first drawing rib, the second groove and the second convex rib jointly form a second drawing rib, and the third groove and the third convex rib jointly form a third drawing rib; the third draw bead is a splayed draw bead, so that the transverse tensile stress is increased, the longitudinal corrugation passing through the third draw bead is transversely stretched, and the wrinkling of a pressure surface on the outer side of the second draw bead is reduced or avoided, so that the upper female die can be completely attached to the outer pressure edge ring, the instability of sheet material drawing is avoided, and the drawing quality is improved.

Preferably, the groove A is parallel to the first straight edge of the A column, and the groove B is parallel to the second straight edge of the A column, so that sufficient transverse tensile stress is ensured.

Preferably, the sum of the length of the groove A and the length of the groove B is 1 m.

Preferably, the height of each rib is 2 mm.

As mentioned above, the side wall outer plate drawing die has the following beneficial effects:

in the drawing process, the upper female die descends, the sheet material is pressed on the blank holder (comprising an outer blank holder and an inner blank holder), because the splayed third drawing rib is arranged between the upper female die and the outer blank holder, the third drawing rib can transversely draw the longitudinal corrugation generated by the sheet material to generate transverse hardening, and the transverse hardening force is always kept in the forming process, thereby reducing the longitudinal corrugation generated in the material inflow direction, avoiding the corrugation of a pressing surface, leading the upper female die and the outer blank holder to be completely jointed, reducing or eliminating the corrugation problem on the outer blank holder, ensuring the drawing quality and simultaneously improving the service life of the drawing die,

drawings

Fig. 1 is a perspective view of a quarter panel.

Fig. 2 is a top view of fig. 1.

FIG. 3 is an exploded view of the side wall outer panel drawing die of the present invention.

FIG. 4 is a schematic view of the lower punch and the blank holder of the present invention.

Fig. 5 is a bottom view of the upper female mold in the present invention.

Description of the reference numerals

The side wall outer plate comprises a side wall outer plate 01, an A column 02, a first straight edge 021, a round corner edge 022, a second straight edge 023, an upper female die 1, a compensating blank holder 11, a lower male die 2, an inner pressing edge ring 31, an outer pressing edge ring 32, a first groove 41, a second groove 42, a third groove 43, a groove A431, a groove B432, a first convex rib 51, a second convex rib 52 and a third convex rib 53.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 5. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 to 5, the utility model provides a side wall outer plate drawing die, which comprises an upper female die 1 and a lower male die 2 matched with the upper female die 1, wherein a compensation blank holder 11 is arranged on the upper female die 1, an inner pressure blank holder 31 matched with the compensation blank holder 11 is embedded in the inner side of the lower male die 2, and an outer pressure blank holder 32 for positioning a plate material together with the inner pressure blank holder 31 is arranged on the outer side of the lower male die 2; the side wall outer plate 01 is provided with an A column 02, and the outer edge of the A column 02 comprises a first straight edge 021, a second straight edge 023 and a round corner edge 022 which connects the first straight edge 021 and the second straight edge 023; the outer pressing edge ring 32 is sequentially provided with a first groove 41, a second groove 42 and a third groove 43 from inside to outside, and the first groove 41, the second groove 42 and the third groove 43 are all positioned on the outer side of the A column 02; the first groove 41 and the second groove 42 are follower grooves, the third groove 43 comprises a groove A431 and a groove B432 which are separately arranged, and the groove A431 and the groove B431 are arranged in a crossed manner to form a splayed groove; the upper female die 1 is provided with a first convex rib 51 matched with the first groove 41, a second convex rib 52 matched with the second groove 42 and a third convex rib 53 matched with the third groove 43; the first groove 41 and the first convex rib 21 jointly form a first draw bead, the second groove 42 and the second convex rib 52 jointly form a second draw bead, and the third groove 43 and the third convex rib 53 jointly form a third draw bead.

It can be understood that the following groove in the present invention is a groove following the shape of the outer edge of the a-pillar 021.

As shown, groove a 431 is parallel to the first straight edge 021 of a-pillar 02 and groove B432 is parallel to the second straight edge 023 of a-pillar 02.

Specifically, the sum of the length of the groove a 431 and the length of the groove B432 is 1 m.

The height of each rib (including the first rib 51, the second rib 52 and the third rib 53) was 2 mm.

When the side wall outer plate 01 is subjected to drawing delay, the upper female die 1 descends, the plate is pressed on the blank holder, longitudinal ripples (ripples basically vertical to the second draw bead) are generated on the outer side of the second draw bead due to the non-uniformity of plate forming, and the longitudinal ripples make the upper female die 1 and the outer blank holder 32 difficult to be attached, so that drawing instability is caused; after the splayed third draw bead is additionally arranged between the upper female die 1 and the external pressure edge ring 32, certain transverse tensile stress can be generated, so that longitudinal corrugations on a sheet material can be transversely stretched, longitudinal folds generated along the material inflow direction are reduced due to the existence of the transverse tensile stress all the time, the condition that a pressure surface is wrinkled is avoided, the upper female die 1 is completely attached to the external pressure edge ring 32, the drawing stability is ensured, and meanwhile, the service life of the drawing die is prolonged.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A side wall outer plate drawing die comprises an upper female die (1) and a lower male die (2) matched with the upper female die (1), wherein a compensation blank holder (11) is arranged on the upper female die (1), an inner pressure blank holder (31) matched with the compensation blank holder (11) is embedded in the inner side of the lower male die (2), and an outer pressure blank holder (32) for positioning a plate together with the inner pressure blank holder (31) is arranged on the outer side of the lower male die (2); the side wall outer plate (01) is provided with an A column (02), and the outer edge of the A column (02) comprises a first straight edge (021), a second straight edge (023) and a round corner edge (022) which connects the first straight edge (021) and the second straight edge (023); the outer pressing edge ring is characterized in that a first groove (41), a second groove (42) and a third groove (43) are sequentially arranged on the outer pressing edge ring (32) from inside to outside, and the first groove (41), the second groove (42) and the third groove (43) are all positioned on the outer side of the A column (02); the first groove (41) and the second groove (42) are conformal grooves, the third groove (43) comprises a groove A (431) and a groove B (432) which are separately arranged, and the groove A (431) and the groove B (432) are arranged in a crossed manner to form a splayed groove; a first convex rib (51) matched with the first groove (41), a second convex rib (52) matched with the second groove (42) and a third convex rib (53) matched with the third groove (43) are arranged on the upper female die (1); the first groove (41) and the first convex rib (51) jointly form a first draw bead, the second groove (42) and the second convex rib (52) jointly form a second draw bead, and the third groove (43) and the third convex rib (53) jointly form a third draw bead.

2. The side wall exterior panel drawing die of claim 1, wherein the groove A (431) is parallel to the first straight edge (021) of the A-pillar (02), and the groove B (432) is parallel to the second straight edge (023) of the A-pillar (02).

3. The side wall outer plate drawing die as claimed in claim 2, wherein the sum of the length of the groove A (431) and the length of the groove B (432) is 1 m.

4. The side outer panel drawing die of claim 1, 2 or 3, wherein each rib has a height of 2 mm.