Material returning structure of blind flange forming die

Abstract

The invention discloses a material returning structure of a blind flange forming die. The material returning structure of the blind flange forming die comprises an upper die set and a lower die set, wherein a die sleeve is arranged at the upper end of the lower die set; a positioning ring, a punch seat, a lower blank pressing concave die and an upper blank pressing concave die are successively arranged in the die sleeve from bottom to top; a limiting seat is arranged between the punch seat and the lower blank pressing concave die; a dowel is slidably arranged in the limiting seat; the tail of the dowel extends into the lower blank pressing concave die and is connected with a punch; a slide cavity is formed in the punch seat; the head of the dowel is slidably arranged in the slide cavity; a jacking cylinder is arranged at the lower end of the lower die set; a piston rod of the jacking cylinder penetrates through the lower die set and is connected with a material returning rod; the material returning rod successively penetrates through the positioning ring, the punch seat, the limiting seat and the punch from bottom to top and is propped against a blind flange which is arranged in the lower blank pressing concave die and the upper blank pressing concave die.

Description

technical field [0001] The invention relates to a forming mold equipment, in particular to a material return structure of a blind hole flange forming mold. Background technique [0002] Blind hole flanges are generally formed by die pressing and forging. The mold after the blind hole flange is formed needs to be returned. The original material return structure mainly includes: an upper mold base and a lower mold base. A mold sleeve is arranged on the upper end of the lower mold base. A positioning ring, a punch seat, a lower blanking die and an upper blanking die are sequentially arranged in the die sleeve from bottom to top, and a punch is arranged in the lower blanking die, and the punch The screw is fixedly connected with the punch base, and a jacking cylinder is arranged at the lower end of the lower mold base, and the piston rod of the jacking cylinder passes through the lower mold base, the positioning ring, the punch base and the punch in turn and is arranged on the l...

AI Technical Summary

Problems solved by technology

During the material return process, because the blind hole flange is a molded forging structure, the connection between the blind hole flange and the punch is relatively tight, and the punch is fixedly connected to the punch seat through screws, the punch cannot move, and the piston rod of the jacking cylinder is lifted upwards. Blind hole flanges require a large jacking force, the jacking cylinder is easily damaged, and the service life is short

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