External spiral rollaway nest forming technology

Abstract

The invention relates to an external spiral rollaway nest forming technology comprising a press, a centre, a male die, a rotation female die, a roll thrust bearing, a sliding bearing, and the like. A preprocessed work piece is put in an inlet of the female die, the centre supports a center hole of the work piece so as to position the work piece, and when extrusion starts, axial pressure enables the female die to generate circumferential tangential component force, and the work piece can establish a rotation extrusion mechanism when running down; a stock is extruded into a reshaping area from an extrusion area, the female die and the rough stock do relative joggle movement according to the requirement of a spiral angle under the control of the spiral angel in the reshaping area to enable rollaway nest tooth forms to form on the surface of the work piece. The invention has chip-free forming, adopts a one-time extrusion forming technology, is particular suitable for power transmission with high cooperation requirement, has quick process speed, high efficiency, consistent process accuracy and low cost and greatly enhances the economic benefic.

Description

Technical field: [0001] The invention relates to an outer spiral raceway forming process. Background technique; [0002] At present, the domestic products with helical angle tooth profile are all processed by cutting, that is to say, the processing of removing metal. First rough machining, then finishing, and then grinding, this is the most common and common processing method, the processing speed is slow, the efficiency is low, and the precision is difficult to be consistent, especially for power transmission with high matching requirements , It is also necessary to increase the ultra-finishing process and purchase special equipment, so that the cost will be even greater. Chipless processing is a new type of tooth profile extrusion forming technology in China. At present, the tooth profile without helix angle is mainly formed in China. The tooth profile with helix angle, especially the external screw extrusion, has not been applied in China. Invention content: [0003] ...

AI Technical Summary

Problems solved by technology

First rough machining, then finishing, and then grinding, which is the most common and common processing method, the processing speed is slow, the efficiency is low, and the accuracy is difficult to be consistent, especially for power transmission with high matching requirements. , it is also necessary to increase the ultra-finishing process and purchase special equipment, so that the cost will be even greater

Chipless processing is a new type of tooth profile extrusion forming technology in China. At present, the tooth profile without helix angle is mainly formed in China. For the tooth profile with helix angle, especially the external screw extrusion, it has not been applied in China.

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