A combined precision die forging forming method

Abstract

The invention discloses a combined precision die forging formation method. The combined precision die forging formation method comprises primary hot straight die forging formation and secondary hot bending die forging formation. Lifting hook straight semi-finished product die forged parts which do not meet the final shape and dimension requirements completely are obtained through a hot straight die forging technology and a hot straight forging die; and the shape and dimension requirements of the lifting hook die forged parts are completely met ultimately through a hot bending die forging formation method and a hot bending forging die. By means of the combined precision die forging formation method, the problems that an existing lifting hook combined die forging formation method for 'blankmaking on a flat die hammer of 10kN, die forging on a forging hammer of 20kN and bending on a trimming pressure machine of 3150kN' is poor in reliability, low in form and location tolerance and dimensional tolerance precision, low in qualified product rate, large in deformation force, low in forging efficiency and short in die forging service life, and the number of forged parts produced by each set of die is less than four thousands are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a combined precision die forging forming method. 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 straight forging die on the 20kN die forging hammer → trimming on the trimming die on the 3150kN trimming press equipment; ③ Bending step: semi-finished die forging heating → in The final bending is done on the hot bending die on the 3150kN trimming press equipment. Therefore, the existing hook die forging process is complex, poor in reliability (poor in technical feasibility, poor in quality reliability and poor in economic rationality), and low in shape and position...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to provide a joint precision die forging forming method, 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 hook joint die forging forming method has poor reliability, low shape and dimensional accuracy, low qualified product rate, large deformation force, low efficiency, and low service life of the forging die.

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