Process method for forming integral top cover and heading die thereof

Abstract

The invention discloses a process method for forming an integral top cover and a heading die thereof. The process method comprises that: high temperature steel ingots are distributively extruded into a drum blank and then fixed in a heading lower die, the side wall of the upper end of the heading lower die is rightly accommodated in a longitudinal annular opening of a heading upper die, the heading upper die moves downwards to make the drum blank form a circle of annular protrusions at the upper end of the outer side wall of the heading lower die, a shaping upper die moves downwards to flatten the inner surface of the drum blank, and finally, the upper ends of the annular protrusions on the side wall of the drum blank are rightly accommodated in an annular forming opening of a forming upper die, and the forming upper die moves downwards to extrude the annular protrusions of the drum blank into a circle of annular flange in set specification. The integral top cover is formed integrally, does not have welding lines and cracks, and is safe and stable; the heading lower die of the heading die for the integral top cover is a drum-shaped cylinder with an opening at the upper end, and the upper end face of the side wall and the inner side wall are in arc transition; and the lower end of the heading upper die is longitudinally provided with a circle of longitudinal annular opening, and the side wall at the lower end of the longitudinal annular opening and the end face of the lower end of the longitudinal annular opening are in arc transition.

Description

technical field [0001] The invention relates to a metal processing process method and related molds, in particular to a forming process method of an integral top cover and an upsetting mold thereof. Background technique [0002] For the large integral top cover due to its huge volume and weight, it is difficult to achieve one-time forming by the current free forging process. The current integral top cover is to form a hollow annular cylinder first, and then form a hollow annular cylinder with the inner diameter The same barrel-shaped body with an open upper end and a closed lower end, the outer diameter of the barrel-shaped body is smaller than the outer diameter of the hollow annular cylinder, and then the lower end of the hollow annular cylinder and the upper end of the barrel-shaped body with an open upper end and a closed lower end are welded together to form a belt There is an integral top cover with flanges, so the welds are easy to crack, and it is not safe and unstab...

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Problems solved by technology

[0002] For the large integral top cover due to its huge volume and weight, it is difficult to achieve one-time forming by the current free forging process. The current integral top cover is to form a hollow annular cylinder first, and then form a hollow annular cylinder with the inner diameter The same barrel-shaped body with an open upper end and a closed lower end, the outer diameter of the barrel-shaped body is smaller than the outer diameter of the hollow annular cylinder, and then the lower end of the hollow annular cylinder and the upper end of the barrel-shaped body with an open upper end and a closed lower end are welded together to form a belt Integral top cover with flanges, so that the welds are easy to crack, unsafe and unstable to use

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