Fractal spinning mould with flat keys and determining method of flat keys

Abstract

Provided are a fractal spinning mould with flat keys and a determining method of the flat keys. The fractal spinning mould comprises a driving core mould and a driven core mould. A pair of flat keys is arranged on the surface where the driving core mould and the driven core mould are matched with a blank, and a pair of flat keys on the lower end face of the driving core mould and a pair of flat keys on the upper end face of the driven core mould form a 90-degree angle in intersection mode. The fractal spinning mould is used, and the flat keys on the driving core mould and the flat keys on the driven core mould are respectively inserted into key grooves distributed on the blank. Rotation torque applied by a machine tool spindle to the driving core mould is transmitted to a work piece through the pair of flat keys on the driving core mould, and rotating of the work piece and the driven core mould with the spindle can be achieved by the work piece and a pair of flat keys matched with the driven core mould, so that synchronous rotation of the driving core mould, the work piece and the driven core mould can be achieved, and the work piece is prevented from sliding relative to the core module. Due to the fact that the flat keys on the driving core mould and the driven core mould are symmetrically distributed and inserted into the key grooves distributed on the blank in 90-degree insertion mode, the fractal spinning mould achieves location effects and prevents eccentricity.

Description

technical field [0001] The invention relates to the field of spinning forming processing, in particular to a fractal spinning die with flat keys and a method for determining the flat keys. 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 realize the rotat...

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 invention proposes a fractal spinning die with a flat key and a method for determining the flat key

Images