A kind of inner contact spinning method of tubular workpiece

Abstract

The invention discloses a method for internal contact spinning of a tubular workpiece, which is specifically operated according to the following steps: the tubular blank to be processed is sleeved on a mandrel, so that the central axes of the mandrel and the tubular blank coincide; The ring-shaped mold starts to rotate in the same direction, and the mandrel is fed along the direction of the central axis; the tubular billet enters the ring-shaped die, and the tubular billet is spin-rolled to process the unprocessed end into a finished product. The ring-shaped mold spinning method of the present invention adopts the inner surface of the mold and the outer surface of the tube-shaped workpiece to carry out the spin-rolling process, the working surface is the inner circular arc ring surface of the ring-shaped mold, and the contact deformation zone with the tube-shaped blank has more With a large wrap angle, the material has a smaller circumferential deformation and radial deformation rate, and at the same time has a larger metal axial elongation. It is an economical and rapid forming technology for thin-walled rotary parts.

Description

technical field [0001] The invention relates to the technical field of spinning and rolling forming, in particular to a method for internal contact spinning of tubular workpieces. [0002] technical background [0003] The spinning or rolling technology of tubular workpieces is generally to make the metal stress position from point to line, from line to surface by rotating the mold, and at the same time give a certain pressure in a certain direction to deform the metal material along this direction and Flow to form the set shape. Existing spinning machines and rolling mills are mostly in contact with the outer surface of the deformation die and the outer surface of the workpiece, and the contact angle between the spinning wheel or roll and the blank of the tube-shaped workpiece is small, and longitudinal cracks and obvious ripples are likely to occur on the surface. defect. Contents of the invention [0004] The object of the present invention is to provide a method of in...

AI Technical Summary

Problems solved by technology

Existing spinning machines and rolling mills are mostly in contact with the outer surface of the deformation die and the outer surface of the workpiece, and the contact angle between the spinning wheel or roll and the blank of the tube-shaped workpiece is small, and longitudinal cracks and obvious ripples are likely to occur on the surface. defect

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