Convex point forming die for automobile safety belt retractors

Abstract

Provided is a convex point forming die for automobile safety belt retractors. A piston rod of an upper die carbon gas spring and an upper die pressing plate are fixed together through bolts, an upper die upper base plate and an upper die clamping plate are fixed together through screws, upper die point-forming punches are fixed to the upper die upper base plate and the upper die clamping plate, and the front end of each upper die point-forming punch is spherical. Material strips are arranged between an upper die and a lower die. A lower die carbon gas spring is fixed to a lower die base, a piston rod of the lower die carbon gas spring penetrates through a preformed hole in a lower die back plate and a preformed hoe in a lower die base plate and is exposed out of the upper surface of the lower die base plate, and a point-forming module is arranged in the lower die base plate, fixed to the lower die back plate through screws and provided with a plurality of concave holes in one-to-one correspondence to a plurality of lower die point-forming punches. Convex points stamped by the convex point forming die are good in surface smoothness; after stamping of the convex points, the impact force on bottom plates of the retractors is small, and the material strips can be well released from the lower die.

Description

Technical field: [0001] The invention relates to the technical field of auto parts production, in particular to a mold for embossing bumps in a continuous mold for a retractor for an automobile safety belt. Background technique: [0002] At present, many automobile parts are produced by continuous stamping dies, see figure 1 , 2 As shown, there is an existing car safety belt retractor A, and several downward convex points A1 are formed on its bottom plate. If the conventional stamping method is used, a dimple is set on the lower die, and a punch is set on the upper die to punch the bottom plate of the retractor A, the surface of the punched out bumps is not smooth, and the punch punches too fast When the stamping pressure on the bottom plate is too large, it affects the strength of the bottom plate, and there is also the problem of demoulding of the continuous mold. Invention content: [0003] The object of the present invention is to aim at the deficiencies of the prio...

AI Technical Summary

Problems solved by technology

If the conventional stamping method is used, a dimple is set on the lower die, and a punch is set on the upper die to punch the bottom plate of the retractor A, the surface of the punched out bumps is not sm...

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