A kind of internal spinning forming method

Abstract

The invention provides an internal spinning forming method. According to the internal spinning forming method, a mode of combining an internal spinning technology and a tension spinning technology isadopted, through the introduction of tension spinning, the problem that when traditional internal spinning forming is adopted, a workpiece is too long, so that the contact area between the outer surface of the workpiece and a mold is too large, then the friction force is large, so that the workpiece cannot be de-molded is solved, and the high-efficiency, rapid, precise and low-cost forming of a long barrel is realized.

Description

technical field [0001] The invention relates to an internal spinning forming method, which belongs to the technical field of spinning forming. Background technique [0002] External spinning is a traditional spinning process technology. The external spinning technology can produce long-length cylindrical rotary parts with external reinforcing ribs. It has high efficiency, can be heated for spinning, and can process curved generatrix shapes. And tapered parts and other characteristics. However, the length of the external spinning die is required to be longer than the length of the product, which is difficult to manufacture, low in assembly accuracy, and high in production costs. Most importantly, products with inner circumferential ribs formed by the external powerful spinning process must be split Molds must be disassembled and reassembled every time a product is produced. The production efficiency is extremely low and it is not suitable for mass production. It has been una...

AI Technical Summary

Problems solved by technology

However, the mold length of the internal spinning technology is required to be longer than the product length, which is difficult to manufacture, low in assembly accuracy, and high in production costs. Most importantly, this process can only produce products with a length of less than 1m. If the product is too long, the workpiece If the contact area between the outer surface and the mold is too large, the friction force is large, and the workpiece will not be released from the mold, so it cannot be applied to the production of large-diameter, high-precision long cylindrical parts required for the development of the national defense industry.

[0004] Existing internal spinning equipment such as figure 1 As shown, (including spinning machine body 01, mandrel 02, rotary wheel 03, workpiece 04, balance wheel mechanism 05, screw 06, binder ring 07, rotary wheel arm 08, and lateral carriage 09), the use Lateral L-shaped cantilever type single-roller internal spinning mechanism, the shaft and radial feed of the spinner 03 are driven by the lateral carriage 09 to drive the L-shaped spinner arm 08 fixed to it, driven by the motor. , Radial movement is realized, the spinning wheel arm is too long, the rigidity of single wheel spinning is extremely low, automatic centering spinning cannot be realized, and the spinning force is small, it is impossible to carry out spinning processing of thick-walled difficult-to-form materials, and cannot meet high-precision Product processing

Images