Free forging method for conical inner hole ring type forge piece

Abstract

The invention discloses a free forging method for a conical inner hole ring type forge piece. The free forging method includes the steps that firstly, a blank is manufactured, secondly, an inner hole is expanded, wherein a cylindrical saddle is used for broaching the blank to the required size, then an expanded punch is used for expanding the inner hole, and a blank with the initial early form is obtained; thirdly, broaching is conducted, wherein a conical saddle horizontally penetrates the inner hole of the blank, a flat anvil is used for downwards pressing the outer circle of the blank, the conical saddle is used for expanding the inner hole of the blank, the blank is rotated by 12 degrees to 15 degrees after each time of downward pressing, circulation is conducted in order, and the inner hole of the blank is preliminarily formed; and fourthly, the inner hole is subjected to secondary finishing, wherein the conical saddle is used for conducting broaching again to reach the required size of the finished forge piece, the end face is flattened, final forming is achieved after finishing, the rotating angle is reduced properly in the finishing stage, the blank is rotated by 8 degrees to 10 degrees after each time of downward pressing, and the finished forge piece is obtained. According to the method, the equipment and the technology are simple, and the product quality is reliable.

Description

technical field [0001] The invention belongs to the technical field of free forging, and relates to a free forging method for forgings such as conical inner hole rings. Background technique [0002] In the free forging production, there are many ring forgings. Because the taper of the tapered inner hole ring forgings is difficult to control in the actual forging process, the shape of the forging blank does not meet the requirements of the drawing and is scrapped. Therefore, it is generally designed in the free forging process. Straight holes require more additional forging blocks, resulting in an increase in the weight of the forging; and due to the limitation of the shape of the forging, the follow-up processing requires a lot of man-hours, and it is easy to cut off the streamline of the forging during processing, which has a certain impact on the service life of the part. [0003] Therefore, there is an urgent need to develop a new forging method, so that the tapered inner...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a free forging method for forgings with conical inner holes, which solves the problem that the prior art conical inner holes are generally designed as straight holes in the free forging process, and many additional forging pieces are required, resulting in The weight of the forging increases; and due to the limitation of the shape of the forging, the follow-up processing takes a lot of man-hours, and it is easy to cut off the streamline of the forging during processing, which affects the service life of the part

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