Three-roller skew rolling forming method for right-angle stepped shaft

Abstract

The invention discloses a three-roller skew rolling forming method for a right-angle stepped shaft, which comprises the following steps of: during first-pass rolling, controlling two skew roller groups to synchronously move towards two ends of a blank for rolling, and basically rolling and forming the blank, so that the consistency of the shapes and the performance of the two ends of the rolled stepped shaft is better; and the inclined roller is composed of a cylindrical part and a circular truncated cone part, and the stepped shaft with the symmetrical right-angle stepped sections is obtained through reciprocating two-pass rolling and three-pass rolling.

Description

technical field [0001] The invention relates to a skew rolling method for shafts, in particular to a three-roll skew rolling forming method with a symmetrical right-angle stepped shaft. Background technique [0002] Skew rolling refers to the rolling in which the rolling stock rotates, deforms and advances along its own axis between two or three rolls with the same rotation direction and longitudinal axes intersecting (or inclined) with each other. Among them, the three-roll skew rolling technology is widely used, which is mainly used for rolling and forming of hollow long shafts. It has the advantages of small rolling force, strong mold versatility, and low equipment manufacturing cost. However, due to the limitation of the shape of the rolls in the three-roll skew rolling process, the stepped shaft with right-angle steps cannot be processed in the forming area of ​​the roll head, resulting in the need for secondary machining at the steps of the stepped shaft, resulting in ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the shape of the rolls in the three-roll skew rolling process, the forming area of ​​the roll head cannot be processed into a stepped shaft with a right-angle step, resulting in the need for secondary machining at the step of the stepped shaft, resulting in waste of materials; and because the current three-roll The limitation of the skew rolling shaft itself (that is, starting from one end of the rolled piece to the other end), leads to differences in the external shape and performance of the two ends of the rolled shaft, and the material on the surface of the shaft will be formed. Reflow occurs during the process, which greatly reduces the forming accuracy of shaft parts

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