Fractal spinning mold with crossed key and method for determining crossed key

Abstract

The invention discloses a fractal spinning mold with crossed keys and a method for determining the crossed keys. The fractal spinning mold comprises a driving core mandrel and a driven mandrel, wherein the crossed keys are arranged on the end faces of the driving mandrel and the driven mandrel, which are matched with a blank. When the fractal spinning mold is used, the crossed key on the driving mandrel and the crossed key on the driven mandrel are respectively inserted into two key grooves on two surfaces of the blank, which are matched with the crossed keys on the end faces of the driving mandrel and the driven mandrel, so that the torque applied by a main shaft of a machine tool to the driving mandrel is transmitted to a workpiece through the crossed key on the driving mandrel; the workpiece and the driven mandrel rotate along with the main shaft through the crossed key by which the workpiece is matched with the driven mandrel; therefore, the driving mandrel, the workpiece and the driven mandrel can synchronously rotate along with the main shaft, and the workpiece can be prevented from sliding relative to the mandrels; and the crossed keys on the driving mandrel and the driven mandrel are inserted into the key grooves on the blank, so that the blank can be positioned and prevented from being eccentric.

Description

technical field [0001] The invention relates to the field of spinning forming processing, in particular to a fractal spinning die with a cross-shaped key and a method for determining the cross-shaped key. Background technique [0002] Fractal spinning is an advanced process method for forming integral wheels, hubs and integral V-groove pulleys. In the current fractal spinning process, the big end of the active mandrel is mechanically connected to the main shaft of the machine tool, and the big end of the driven mandrel is also connected to the tail top by mechanical means. The center line of the tail top coincides with the center line of the main shaft. The surface is matched with the small end face of the active mandrel, and the other surface of the blank is matched with the small end face of the driven mandrel. During spinning, only the frictional force applied by the active mandrel to the workpiece and the frictional force applied by the workpiece to the driven mandrel r...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the friction existing in the prior art, it is difficult to continue to drive the workpiece and the driven mandrel to rotate synchronously with the main shaft, and cause the workpiece to slip and eccentrically, or even get stuck and unable to rotate, thus affecting the normal spinning process. The present invention proposes a fractal spinning die with a cross-shaped key and a method for determining the cross-shaped key

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