Free forging process for large cross-shaped forgings

Abstract

The invention provides a free forging process for large cross forged pieces. The process includes the specific steps that first, steel ingots are forced into eight-square-face forged blanks, and the eight side faces of each eight-square-face forged blank are the first side face, the second side face, the third side face, the fourth side face, the fifth side face, the sixth side face, the seventh side face and the eighth side face in sequence; second, two anvil blocks are used for forging and pressing the eight-square-face forged blanks, each anvil block comprises three working faces which are connected in sequence to be arranged in the shape of ')' as a whole, every two working faces located on the two sides are perpendicular to each other, the two anvil blocks are used for forging and pressing the first side faces and the fifth side faces of the eight-square-face forged blanks respectively so that the first side faces and the fifth side faces can be concave downwards to form notches shaped like ')', the forged pieces penetrate through the notches shaped like ')' in the thickness direction, the two anvil blocks are used for forging and pressing the third side faces and the seventh side faces of the eight-square-face forged blanks respectively so that the third side faces and the seventh side faces can be concave downwards to form notches shaped like ')', and the forged pieces penetrate through the notches shaped like ')' in the thickness direction; third, the forged pieces are subjected to finishing so that forging can be completed.

Description

technical field [0001] The invention belongs to the technical field of forging and forming of large forgings, and in particular relates to a free forging process of large cross-shaped forgings. Background technique [0002] figure 1 The structural diagram of a large cross-shaped forging is shown. The biggest feature of this type of forging is that the forging is in the shape of a cross as a whole, and there are extensions of the same or similar size in four directions. According to experience, at present, the free forging process of such forgings at home and abroad usually adopts the overall wrapping method to forge such forgings into octagonal forging blanks (such as figure 2 ) or square forging (such as image 3 ), and finally the forging is machined into the shape of the part by machining. [0003] For the production of such parts, the disadvantages of this forging process are as follows: [0004] (1) Waste a lot of raw materials; [0005] (2) Machining time increas...

AI Technical Summary

Problems solved by technology

[0004] (1) Waste a lot of raw materials;

[0005] (2) Machining time increases and production efficiency is low;

[0006] (3) It is impossible to guarantee that the forgings proposed in the design should ensure the fibrous technical requirements of the forgings as much as possible, cutting off the tissue fibers of the forgings, greatly reducing the mechanical properties of the product and affecting the service life

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