A forging die formed by combined die forging

Abstract

The invention discloses a hot straightening forging die and a hot bending forging die for combined die forging formation. The hot straightening forging die comprises a drawing and flattening blankingimpression, a diagonal-form lock catch, a pre-forging impression, a pre-forging flash gutter, a final-forging impression and a final-forging flash gutter, and is used for obtaining hook straight semi-finished die forgings not completely meeting the final shape and dimension requirements. The hot bending forging die comprises a pre-bending impression, a final-bending impression and a single-longitudinal dual-corner combined lock catch and is used for obtaining hook die forged pieces thoroughly meeting the shape and dimension requirements. The hot straightening forging die and the hot bending forging die for combined die forging formation have the technical feasibility, quality reliability, economic rationality and using safety, and the problems of poor reliability, low form and location tolerance and dimension tolerance precision, low quality rate, high deformation force, low efficiency, short service life of the forging dies and the like of an existing combined die forging formation method including blanking on a 10-kN free forging hammer, die forging on a 20-kN die forging hammer and bending on a 3150-kN trimming press are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging die formed by combined die forging. Background technique [0002] Taking the die forging of high-power and high-speed diesel engine hook parts as an example, the existing hook combined die forging process is divided into three major steps: ① Billet making step: billet heating → billet forming on a 10kN free forging hammer; ② Die forging step: Billet heating → direct final forging on the hot flat forging die on the 20kN die forging hammer → trimming on the trimming die on the 3150kN trimming press equipment; ③Bending step: heating the semi-finished die forging → in Final bend forming on a hot bending die on a 3150kN trimming press facility. Therefore, the existing hook die forging process is complicated, with poor reliability (poor technical feasibility, poor quality reliability and poor economic rationality) and low dimensional accuracy (only up to GB / T1236...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to provide a forging die formed by combined die forging, which can effectively solve the problem of "making billets on a 10kN free forging hammer, forging on a 20kN die forging hammer, and bending on a 3150kN trimming press" The joint die forging forming method has poor reliability, low precision of shape and position tolerance and dimensional tolerance, low rate of qualified products, large deformation force, low efficiency, and low service life of forging dies, etc.

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