Die assembly for piston manufacturing

Abstract

The invention discloses a die assembly for piston manufacturing, and belongs to the field of piston manufacturing. The die assembly comprises an upper die, a lower die, a left side punching die, a right side punching die, a left side punch and a right side punch, wherein the left side punching die and the right side punching die are horizontally arranged on the left side and the right side of the lower die, the left side punch is fixed to the end of the left side punching die, and the right side punch is fixed to the end of the right side punching die. According to the die assembly, the upper die and the lower die are combined and provided with side punching stretching die structures, and therefore the forging and pressing process is divided into rough forging and finish forging; and when the die assembly is used for piston forging and pressing, the middle portion of the upper die and the middle portion of the lower die are formed firstly, then the punches at the two ends carry out side punching stretching on the two ends to form a barrel shape, and therefore material flow is smooth, and the appearance precision size of a product is in place. According to the die structure, part discharging is convenient and rapid, the product quality is ensured, and the die assembly has the beneficial effects that the number of procedures is reduced, benefits are increased, die cracking is prevented for reducing forging pressure, equipment losses are reduced, and cost expenditure is saved.

Description

technical field [0001] The invention relates to the field of piston preparation, in particular to a mold assembly for piston preparation. Background technique [0002] In the prior art, cup-shaped piston products with both ends are formed in the middle, which is difficult to form and requires high axial tonnage of equipment; at the same time, this type of product requires high appearance precision, the cups and barrels at both ends must be concentric, and the inner and outer diameters have no pull Injury, high precision requirements for molds and equipment. Contents of the invention [0003] The object of the present invention is to provide a mold assembly for piston production. [0004] The technical solution of the present invention is: a mold assembly for piston preparation, including an upper mold, a lower mold, a left punch and a right punch horizontally arranged on the left and right sides of the lower mold, and a left punch fixed at the end of the left punch. The ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, cup-shaped piston products with both ends are formed in the middle, which is difficult to form and requires high axial tonnage of equipment; at the same time, this type of product requires high appearance precision, the cups and barrels at both ends must be concentric, and the inner and outer diameters have no pull Injuries, high precision requirements for molds and equipment

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