CN217252115U

CN217252115U - Female die structure of deep drawing die for manufacturing rear mounting plate of automobile engine bracket

Info

Publication number: CN217252115U
Application number: CN202123419380.7U
Authority: CN
Inventors: 李林鑫; 徐丽萍
Original assignee: Sichuan Vocational College of Chemical Technology
Current assignee: Sichuan Vocational College of Chemical Technology
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-23
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a die structure of deep-drawing mould of mounting panel behind preparation automobile engine bracket, including the die main part, it is provided with in the terrace die turn-ups region and to store the material when the secondary draws/turn-ups process thereby to reach the convex closure of inhaling the material effect to lie in the die main part, and the fillet radius of die main part is 16~20 mm. The utility model discloses a design convex closure to inject its position, shape and size of a dimension, adjust die fillet radius size simultaneously, both intercombination can effectively eliminate the cracked defect of engine bracket rear mounting panel appearance, avoids the regional problem that easily takes place to ftracture in turn over edge turning behind the rear mounting panel shaping, has reduced the disability rate of part well.

Description

Female die structure of deep drawing die for manufacturing rear mounting plate of automobile engine bracket

Technical Field

The utility model relates to an automobile parts prepares technical field, concretely relates to be a die structure of deep-drawing mould of mounting panel behind preparation automobile engine bracket.

Background

The rear mounting plate of the automobile engine bracket is used for mounting and positioning the engine bracket and bearing a certain load, and has an important effect on the overall safety of an automobile.

At present, the rear mounting plate of the engine bracket is mostly formed by combining a drawing die and a stamping process, and the main forming procedures are as follows in sequence: primary drawing, trimming and punching, punching side trimming, secondary drawing/flanging, punching/side trimming. Fig. 1 shows a rear mounting plate structure of a formed automobile engine bracket. It can be seen that the profile of the rear mounting plate is relatively complex, and because it plays an important role in the overall safety of the automobile, it is not required to have quality defects that affect the appearance and strength, such as wrinkling, necking, cracking, starving, excess material, overlapping, scratching, crushing, pulling, etc. However, in the existing deep drawing die for preparing the rear mounting plate of the engine bracket, because the structural design of the convex die and the concave die is not reasonable enough, the flanging corner area of the rear mounting plate which is subjected to stamping forming is easy to crack under the premise that the preparation process is not changed, so that the strength of a stamping part is influenced, and the rejection rate is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a die structure of deep-drawing mould of mounting panel behind preparation automobile engine bracket avoids the back mounting panel shaping back as far as possible, and the regional problem that easily takes place to ftracture in turn-ups turning.

In order to achieve the above object, the utility model adopts the following technical scheme:

the female die structure of the deep drawing die for manufacturing the rear mounting plate of the automobile engine bracket comprises a female die body, wherein a convex hull capable of storing materials during a secondary drawing/flanging process and achieving a material suction effect is arranged in a male die flanging area on the female die body, and the fillet radius of the female die body is 16-20 mm.

Specifically, the shape of the convex hull is rectangular, and the length, the width and the depth of the convex hull are respectively 60mm, 35mm and 1.5 mm.

Preferably, the radius of the fillet of the female die body is 18 mm.

Preferably, the material of the female die body is Cr12 MoV.

Compared with the prior art, the utility model discloses following beneficial effect has:

after the inventor fully researches the forming process of the mounting plate, the inventor finds that cracks are generated during the secondary drawing/flanging, because the material becomes thinner in the primary drawing and the secondary drawing/flanging process, and the size of the fillet of the female die during the primary drawing affects the stress and depth change of the material in the area corresponding to the flanging position (as shown in A in figure 2) during the secondary drawing. Therefore, the utility model discloses a design convex closure to inject its position, shape and size of a dimension, adjust die fillet radius size simultaneously, both inter combination can effectively eliminate the cracked defect of back mounting panel appearance, has reduced the disability rate of part well.

Drawings

Fig. 1 is a schematic structural diagram of a rear mounting plate of a conventional automobile engine bracket.

Fig. 2 is a schematic diagram of a die structure of a drawing die in the prior art.

Fig. 3 is a schematic structural diagram of an embodiment of the present invention.

Fig. 4 is a forming limit curve diagram of the round corner radius of the concave die of 18mm in the embodiment of the invention.

Wherein, the part names corresponding to the reference numbers are:

1-a female die body and 2-a convex hull.

Detailed Description

The utility model provides a die structure among deep-drawing mould under the unchangeable prerequisite of preparation technology, can effectively avoid the problem that the regional easy emergence of fracture of turn-ups turning behind the back mounting panel shaping. The present invention will be further described with reference to the following description and examples, including but not limited to the following examples.

Examples

As shown in fig. 3, the die structure that this embodiment designed, including die main part 1, compare current die, the utility model discloses a main design point has two, promptly: (1) a convex hull 2 (a part circled in figure 3) is arranged in the flanging area of the convex die on the concave die body; (2) and adjusting the radius of the fillet of the concave die to be 16-20 mm. In the embodiment, the convex hull 2 is rectangular, the length, width and depth of the convex hull are respectively 60mm, 35mm and 1.5mm, and materials can be stored during secondary drawing/flanging of a product by utilizing the position of the convex hull and combining the shape and size design of the convex hull, so that the material suction effect is achieved.

Meanwhile, in the embodiment, the female die body 1 is made of Cr12MoV, and the hardenability, the hardness of quenching and tempering, the wear resistance and the strength of the female die body are all higher than those of Cr12, so that the female die body is very suitable for manufacturing male dies and female dies in deep drawing dies with large sections, complex shapes and heavy working conditions.

Testing and analyzing:

(1) table 1 is for not establishing the convex closure, the material thickness change of the defect of breaking correspondence position under different die fillet radii only, and the unit is mm:

TABLE 1

Radius of die fillet	Material thickness after primary drawing process	Thickness of material after trimming and punching	Thickness of the material after flanging
				16	1.371	1.370	1.049
17	1.368	1.373	1.028
				18	1.376	1.376	1.107
19	1.370	1.375	1.051
				20	1.368	1.375	1.046

According to the results in table 1, the adjustment of the radius of the fillet of the female die has certain improvement effect on the crack defect, and particularly when the radius of the fillet of the female die is 18mm, the reduction rate is minimum, and the improvement effect is optimal.

(2) On the basis of (1), through setting up the convex closure, the analysis is to eliminating the effect of the defect of breaking, and table 2 is the thick change of the material of the defect corresponding position of breaking after setting up the convex closure, and the unit is mm:

TABLE 2

Radius of fillet of concave die	Material thickness after primary drawing process	Thickness of material after trimming and punching	Thickness of the material after flanging
				18	1.375	1.375	1.119

It can be seen that when the fillet radius of the female die is 18mm, the convex hull is arranged in the flanging area of the male die, the shape and the size of the convex hull are limited, and the material thickness can be further improved. Fig. 4 is a forming limit curve of the corresponding position of the breaking defect after the convex hull is additionally arranged on the female die body when the radius of the round corner of the female die is 18mm, and it can be seen that the breaking defect is effectively eliminated by arranging the convex hull on the basis that the radius of the round corner of the female die is 18 mm.

Through production verification, by adopting the female die structure designed by the embodiment, the forming quality of the original fracture area position of the rear mounting plate is better under the combination of the existing stamping process, and the existing problems are effectively solved.

The utility model discloses seem simple, really be difficult for thinking, only go deep into the structural feature and the applied scene of analysis automobile engine bracket rear mounting panel, combine the characteristic of preparation technology, could rational design out the stronger improvement scheme of pertinence to improve the rear mounting panel and lead to the higher situation of disability rate because of the regional easy emergence fracture of turn-ups turning.

According to the above embodiment, the utility model can be realized well.

Claims

1. A female die structure of a deep drawing die for manufacturing a rear mounting plate of an automobile engine bracket comprises a female die main body (1), and is characterized in that a convex hull (2) capable of storing materials during a secondary drawing/flanging process is arranged in a convex die flanging area on the female die main body (1) so as to achieve a material suction effect, and the fillet radius of the female die main body (1) is 16-20 mm; the convex hull (2) is rectangular, and the length, width and depth of the convex hull are respectively 60mm, 35mm and 1.5 mm.

2. The die structure of the deep drawing die for manufacturing the rear mounting plate of the automobile engine bracket according to the claim 1, characterized in that the fillet radius of the die body (1) is 18 mm.

3. The female die structure of the deep drawing die for manufacturing the rear mounting plate of the automobile engine bracket according to claim 1 or 2, wherein the female die body (1) is made of Cr12 MoV.