Friction Stir Extrusion Forming Method for Aluminum Alloy Disc and Hub Parts

Abstract

The invention discloses a friction stir stamping-extrusion forming method for an aluminum alloy hub-like part. The method includes the following steps that S1, a female die is fixedly installed on a workbench; S2, a blank is heated to a solid solution temperature and then transferred into a die cavity of the female die; S3, a punch is driven to conduct feeding movement and high-speed rotating movement towards the aluminum alloy blank, feeding movement stops when the punch makes contact with the surface of the blank till the feeding depth of the punch reaches a certain value, the punch is driven to only conduct high-speed rotating movement on the blank, when the temperature of the blank is increased to a proper temperature range, the punch is driven to conduct feeding movement and high-speed rotating movement on the blank simultaneously, friction stir loading is conducted on the blank, and an aluminum alloy hub-like workpiece is formed; and S4, the workpiece is subjected to quenching treatment, trimming and shaping, and aging treatment, so that the formed workpiece is obtained. Through the friction stir stamping-extrusion forming method for the aluminum alloy hub-like part, the flow behavior of metal can be effectively improved, the plasticity of the metal is improved, metal grains are refined, and the performance and forming quality of the metal are improved.

Description

technical field [0001] The invention belongs to the technical field of punching and extrusion forming, and in particular relates to a friction stir punching and extrusion forming method of aluminum alloy disk hub parts. Background technique [0002] The processing of disc hub parts generally uses the extrusion forming process, which is a plastic processing method that applies external force to the metal blank in the die to obtain the required shape and size. Friction is an important factor affecting the performance of products. During the extrusion process, friction acts as an obstacle, and flow defects are prone to occur during the extrusion process, and consume a lot of extrusion energy, which affects the forming quality of the workpiece. The traditional way to improve the metal flow in the extrusion forming process is to improve the flow behavior of the metal macroscopically by optimizing the process parameters, but this cannot fundamentally prevent the occurrence of defe...

AI Technical Summary

Problems solved by technology

Friction is an important factor affecting the performance of products. During the extrusion process, friction acts as an obstacle, and flow defects are prone to occur during the extrusion process, and consume a lot of extrusion energy, which affects the forming quality of the workpiece.

The traditional way to improve the metal flow in the extrusion forming process is to improve the flow behavior of the metal macroscopically by optimizing the process parameters, but this cannot fundamentally prevent the occurrence of defects; and the friction between the blank and the mold consumes a large amount of extrusion Especially for the forming of metal materials with low plasticity, the production efficiency is extremely low

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