Automotive Aluminum Sheet Warm Stamping Forming Technology

[China Aluminum Industry Network] The aluminum alloy sheet metal forming process is influenced by many factors such as material forming performance, process parameters and mold design, lubrication and friction conditions, and is still a new sheet metal forming press for further research and development. technology. If it breaks out, it can provide efficient forming technology—average production parts per hour (ASPH) is greater than 540 pieces.

In recent years, aluminum alloy plate warm forming technology has begun to be applied to automobile bodies. Figure 11 shows the aluminum sheet stampings of the SAW sedan body outer cover of Hunan University. At present, there are still some deficiencies in the stamping technology of sheet metal temperature forming stamping for body aluminum sheet, which is mainly manifested in the following aspects.

(1) Formability needs further improvement. The aluminum alloy sheet has poor local drawability and is prone to cracks, particularly in parts with relatively complex shapes.

(2) In order to avoid pulling cracks, stamping and stretching are often insufficient, and as the outer cover, defects such as local surface distortion are likely to occur, affecting the surface quality.

(3) The dimensional accuracy is not easy to grasp and rebound is difficult to control. Due to the above reasons, aluminum stamping dies are difficult to develop and require long debugging cycles, which results in high cost and difficulty in meeting the quality requirements of high-grade car body parts.