Composite die for trimming and piercing of forgings

Abstract

Provided is a composite die for trimming and piercing of forgings. The composite die is used for synchronous machining of trimming and piercing of perforated forgings formed by forging. The composite die comprises a base; the base is provided with a fixedly-connected female die holder and a rotationally-connected piercing punch; the female die holder is detachably connected with a female die used for cutting off flashes of the outer walls of the perforated forgings; an elastic gasket is arranged below the base; a plurality of guide through holes are formed in the base; the elastic gasket is provided with an ejector rod in sliding connection with the guide through holes; the ejector rod is connected with a supporting plate, and the supporting plate can slide on the outer side of the piercing punch in the axis direction of the piercing punch and is used for supporting the perforated forgings; the female die is detachably connected with a scraper blade; and a trimming punch in sliding connection with the scraper blade is arranged above the female die. The composite die for trimming and piercing of the forgings reduces the manufacturing cost and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a composite die used for trimming and punching a forging once during the forming process of the forging. Background technique [0002] Forgings often produce flash during die forging, so it needs to be removed by trimming after forging. figure 1 It is a structural schematic diagram of a forging with holes, such as figure 1 As shown, the forging with a hole 1 will have flashes 11 that need to be removed after forging, and there is usually a continuous skin around the inner hole 12 (not shown in the figure), so it needs to be removed by punching. In addition, after punching, the inner wall of the inner hole 12 usually has residual burrs, which need to be cleaned by grinding. The trimming and punching processes of the existing forging process are carried out separately, and since the trimming and punching of forgings need to be carried out in a hot state, a reheating process needs...

AI Technical Summary

Problems solved by technology

This process route has disadvantages such as long production cycle, multiple assembly and disassembly of molds, and low labor efficiency.

In addition, repeated heating of forgings may affect the structure of forgings, so there will be certain hidden dangers in quality

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