Automobile side wall outer plate drawing die provided with auxiliary drawing male die

Abstract

The invention discloses an automobile side wall outer plate drawing die provided with an auxiliary drawing male die. The automobile side wall outer plate drawing die provided with the auxiliary drawing male die comprises an upper die holder, a lower die holder and a blank holder. The upper die holder is provided with a drawing female die. The lower die holder is correspondingly provided with a drawing male die matched with the drawing female die. The drawing male die is arranged inside the blank holder and connected with the blank holder in a sliding manner. The auxiliary drawing male die is arranged on the lower die holder. The auxiliary drawing male die is located between the drawing male die and the blank holder and connected with the blank holder in a sliding manner. The auxiliary drawing male die is opposite to the connection site of the automatic side wall outer plate, a back cover and a back air window. According to the automobile side wall outer plate drawing die provided with the auxiliary drawing male die, because the auxiliary drawing male die is arranged between the drawing male die and the blank holder, in the early period of drawing forming, the auxiliary drawing male die can allow plate materials to flow in, and the situation that the plate materials are drawn broken because the plate materials are excessively thin is avoided; and in the later period of drawing forming, the auxiliary drawing male die can prevent outside plate materials from flowing in and can also have the function of drawing the plate materials from the inner side to the outer side, and therefore deformation of the plate materials opposite to the connection site is more sufficient.

Description

technical field [0001] The invention belongs to the technical field of drawing dies for automobile covers, and in particular relates to a drawing die for an automobile side wall outer panel with an auxiliary drawing punch. Background technique [0002] At present, people's pursuit of car body shapes is mainly round and streamlined shapes, and changes in car body shapes have also increased the difficulty of manufacturing car panels. The outer panel of the side wall of the car is one of the important covering parts of the car, such as figure 1 As shown in Fig. 1, there is an obvious curvature change in the profile at the overlapping area of ​​the side wall outer panel, the rear windshield and the rear cover, and the profile has a trend from convex to concave and then to convex. The gap is not a straight line, but a curve with an anti-concave trend. Therefore, in the drawing forming process of the sheet metal, problems of insufficient deformation of the sheet metal and uneven...

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Problems solved by technology

[0004] Drawbead adjustment is to increase the resistance between the sheet and the drawing die, so as to achieve the purpose of controlling the inflow of the sheet and making the deformation of the sheet more sufficient. This method can increase the thinning rate to a certain extent, but there are the following Three defects: first, due to the deep drawing depth in this area, a certain amount of sheet material is required to flow in, otherwise the sheet material will be cracked, and the reinforcement margin of the drawbead is limited at this time; Second, in the actual production process, especially in mass production, if there is a strong drawbead at the position where the sheet material flows in, the drawbead will be severely worn. In order to ensure the smooth progress of production, it is necessary to Manual welding and repairing of the drawn ribs not only increases the workload and reduces the production efficiency, but also the long-term repair of the drawn ribs will also affect the durability of the drawing die; third, when the sheet passes through the stronger ribs, It will make the zinc skin on the sheet fall off more easily, so it is necessary to stop the equipment to clean the mold during the production process, and it also increases the repair rate of parts

[0005] The method of adjusting the supplementary shape of the process is to increase the thinning rate of the area by designing the supplementary shape of the process in this area, but the effect is not good, because if the supplementary shape of the process is too large, it is easy to cause cracking or wrinkling of the part, And if the supplementary shape of the process is too small, the effect will be limited, and the purpose of optimization cannot be achieved.

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