A method for forging a horizontal I-shaped stepped shaft with a tire mold
A step shaft and I-shaped technology, which is applied in the forging field of horizontal I-shaped step shafts, can solve the problem that it is difficult to meet the coaxiality requirements of the horizontal I-shaped step shaft, and achieve the effect of ensuring the coaxiality.
Active Publication Date: 2017-07-25
SHAANXI HONGYUAN AVIATION FORGING
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Problems solved by technology
[0002] Usually, the horizontal I-shaped step shaft is made of a finished forging after the bar is heated, and the two ends are upset, and then the upsetting part at both ends and the unupsetting part in the middle are respectively die-forged to make the required die-forging horizontal part. However, in the above method, the two ends and the middle part of the horizontal I-shaped step shaft are forged separately, and no measures are taken to ensure the coaxiality of the entire shaft during the forging process, so it is difficult to achieve the horizontal I-shaped step. Shaft Coaxiality Requirements
Method used
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Embodiment Construction
[0010] The present invention is described in further detail below by specific embodiment:
[0011] A certain type of part is a horizontal I-shaped step shaft made of 30Ni4CrMoA material, which must be processed after free forging; the coaxiality of the required horizontal I-shaped step shaft forging is less than 3mm, and the forging size is: the diameter of the intermediate shaft 100mm, length 370mm, one end shaft diameter 180mm, length 35mm; the other end shaft diameter 180mm, length 35mm.
[0012] Select the 30Ni4CrMoA bar stock with a diameter of 100mm and a length of 763mm according to the above-mentioned requirements; adopt the forging method of the present invention: at first prefabricate the closed T-type tire mold by 5CrNiMo mold steel,
[0013] The die cavity of described closed T-type tire mold stem part is the cylindrical shape of inner diameter 102mm, long 560mm, and the die cavity of T-type tire mold head is the cylindrical shape of inner diameter 183mm, long 35mm...
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Abstract
The invention relates to the technical field of forging of H-shaped step shafts, in particular to a method for forging an H-shaped step shaft through moulding beds. The method includes the steps that the integral T-type moulding bed, the I-shaped moulding bed with the left and right portion open and a cylindrical sleeve are prefabricated; one end of a bar of raw materials is located outside a furnace door, the other end of the bar is located in the heating area, the bar is placed into a cavity of the reversed T-type moulding bed after being heated, and the head, exposed out of the upper end of the T-type moulding bed, of the bar is subjected to upsetting so that a T-type preforged blank can be formed; and one end of a rod of the T-type preforged blank is heated, then the preforged blank is placed in the I-shaped moulding bed, the preforged blank and the I-shaped moulding bed are wholly erected, and the other end, exposed out of the I-shaped moulding bed, of the preforged blank is subjected to upsetting, so that the unformed end of the preforged blanks is in an H shape. By means of the forging method, axis deviation of the H-shaped step shaft forged piece is avoided, so that coaxiality of the whole H-shaped step shaft forged piece is ensured. The requirement for the flow line of the forged piece is met, and the qualified rate of the forged piece is improved.
Description
technical field [0001] The invention relates to the technical field of forging a horizontal I-shaped stepped shaft. Background technique [0002] Usually, the horizontal I-shaped step shaft is made of a finished forging after the bar is heated, and the two ends are upset, and then the upsetting part at both ends and the unupsetting part in the middle are respectively die-forged to make the required die-forging horizontal part. However, in the above method, the two ends and the middle part of the horizontal I-shaped step shaft are forged separately, and no measures are taken to ensure the coaxiality of the entire shaft during the forging process, so it is difficult to achieve the horizontal I-shaped step. Shaft coaxiality requirements. Contents of the invention [0003] The technical problem to be solved by the invention is: the coaxiality problem in the forging process of the horizontal I-shaped stepped shaft. [0004] The technical solution of the present invention is: ...
Claims
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IPC IPC(8): B21K1/12B21J13/02
Inventor 郝宏斌李明李增乐姚彦军王华
Owner SHAANXI HONGYUAN AVIATION FORGING