The cold forging production process of the pressure box gland of the tiller

Abstract

The invention discloses a cold forging production process of a pressure box gland of a micro tiller, comprising the following steps: 1) blanking; 2) one-ring cold forging: adopting a one-ring cold forging die to cold forge the blank into a transition gland , the arc transition between the top surface of the transition gland and the top side wall of the transition gland, the radius of the arc is equal to 1 / 4-1 / 3 of the diameter of the transition gland top, and the transition pressure The edge of the cover is tapered, and its taper is 115-125°; 3) Two-ring cold forging: the transitional gland is cold forged into a gland forging by using a two-ring cold forging die; 4) Machining. The cold forging is divided into two steps, the first step is one-ring cold forging, the billet is cold forged into a transition gland, the second step is two-ring cold forging, the transition gland is cold forged into a gland forging; The cold forging is divided into two steps, and the two-step cold forging can bear part of the deformation in the cold forging forming process, thereby reducing the deformation in each step of cold forging, so that the step-by-step cold forging can achieve the plasticity of the material Shapeshifting requirements.

Description

technical field [0001] The invention belongs to the technical field of cold forging, and in particular relates to a cold forging production process of a press box gland of a tiller. Background technique [0002] Forging can be divided into cold forging and hot forging according to the temperature of the blank during processing. Cold forging is generally processed at room temperature, and hot forging is processed at a temperature higher than the recrystallization temperature of the blank metal. There are three main purposes of hot forging: [0003] 1) It can reduce the deformation resistance of the metal, thereby reducing the forging force required for the deformation of the bad material, and greatly reducing the tonnage of the forging equipment; [0004] 2) Change the as-cast structure of the steel ingot. After recrystallization in the hot forging process, the coarse as-cast structure becomes a new structure of fine grains, and reduces the defects of the as-cast structure ...

AI Technical Summary

Problems solved by technology

[0007] Because the forging of the pressure box gland of the tiller is relatively large, it is generally made by hot forging. However, because the production method of hot forging requires high temperature heating, the production cost is high, and there is a mechanical strength of the final gland. Insufficient defects

However, if the existing cold forging forming method is directly used to cold forge the gland, because the forging of the gland is relatively large, the disc-shaped blank will cause defects such as blank fracture during the process of cold forging and forming the gland, and cannot be qualified. The product

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