External spiral rollaway nest forming technology

A forming process and external spiral technology, which is applied in the field of external spiral raceway forming process, can solve the problems that the tooth shape with helix angle cannot be applied, increase the ultra-finishing process, and the processing speed is slow.

Inactive Publication Date: 2009-11-04
孙乙钦
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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.

Method used

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  • External spiral rollaway nest forming technology

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Embodiment Construction

[0006] Below in conjunction with accompanying drawing, the present invention will be further described;

[0007] An outer spiral raceway forming process, mainly including a press, a top, a punch, a punch fixing plate, an upper fixing plate, a rotating die, a die fixing part, a base, a rolling thrust bearing, a sliding bearing, and a sliding backing plate etc. It is characterized in that: Put the pre-treated workpiece into the entrance of the die, start the press, use the upper tip to withstand the center hole of the workpiece and position it, and then start to press in. At the beginning of extrusion, the axial press The input force can cause the die to generate a circumferential tangential component force, and the workpiece can gradually establish a rotary extrusion mechanism when it goes down; the stage from the beginning of extrusion to the blank being extruded into the shaping area is the transitional extrusion stage, and then passes through the shaping stage , the blank is...

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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] ...

Claims

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Application Information

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IPC IPC(8): B21H3/02B21C25/02
Inventor 丁海靖王建明
Owner 孙乙钦
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