Punch forming device of guide grooves of energy-absorbing box of automobile anti-collision rod

Abstract

The invention discloses a punch forming device of guide grooves of an energy-absorbing box of an automobile anti-collision rod, which is used for solving the forming problem of the guide grooves. Thetechnical scheme is as follows: the punch forming device comprises a core die, a core die oil cylinder and punching oil cylinders, wherein the shape of the core die is matched with the shape of an inner cavity of the energy-absorbing box and is combined by an upper part and a lower part which are respectively a static core die positioned therebelow and a movable core die positioned thereabove; theinterface of the upper part and the lower part is a folding surface and divides concave dies corresponding to all guide grooves into an upper part and a lower part; the core die oil cylinder is positioned above the core die and a piston rod thereof drives the movable core die; the punch oil cylinders are four and respectively correspond to the guide grooves on the four surfaces of the energy-absorbing box; and each punching oil cylinder drives a punching die which is matched with the corresponding punching die. Compared with the traditional punching device, the punch forming device has high punching efficiency and simple operation, not only guarantees the quality of the energy-absorbing box, but also reduces the production cost.

Description

technical field [0001] The invention relates to a device for stamping guide grooves on an energy-absorbing box of an automobile anti-collision bar, belonging to the technical field of metal stamping. Background technique [0002] The automobile anti-collision bar energy-absorbing box is a part of the car bumper. On the one hand, it provides support and fixes the bumper on the car body. Absorbs energy from impact. figure 1 It is a commonly used energy-absorbing box with a "day"-shaped cross-section and a closed cavity structure. Its four walls are covered with concave guide grooves at different positions, which are used to reduce the strength of the position of the guide groove and make the absorber When the energy box collapses, it can first start to collapse from the guide groove according to the predetermined designed route. [0003] The four walls of the energy-absorbing box are designed with different numbers of guide grooves. When the existing punching device is used ...

AI Technical Summary

Problems solved by technology

During the stamping process, the energy-absorbing box needs to be loaded and unloaded and stretched repeatedly, the energy-absorbing box is easily deformed and scratched, and the process operation has a long turnaround time, which reduces the processing efficiency and increases the processing cost

In addition, another unsolvable process problem is that the mandrel must allow at least one space for the depth of the guide groove for material return, so the mandrel can only be made thin. When the three sides need to avoid the guide groove, the mandrel The maximum thickness and width of the energy-absorbing box can only be about 1 / 2 of the inner cavity size of the energy-absorbing box, and the mandrel generally adopts a cantilever beam structure. Such a mandrel is very easy to break at the place where the guide groove is formed, and the strength cannot be guaranteed.

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