Forming method for improving forming performance of 6XXX series aluminum alloy plate

Abstract

The invention relates to a forming method for a 6XXX series aluminum alloy plate for an automobile body. The method includes the steps that dies are installed on stamping equipment, and the female die and the male die are adjusted to be aligned, wherein a heating element is arranged inside the stamping female die, and a cooling device is arranged inside the male die; the 6XXX series aluminum alloy plate of which the thickness is 0.8 mm-1.5 mm and the heat treatment state is T4 is placed on the stamping female die, then the stamping female die is heated to 160 DEG C-250 DEG C, the male die is kept at the indoor temperature, and the heat preservation process is controlled to last for 3 min-15 min; after heat preservation, a punching machine program is started, warm forming treatment is performed, and the whole stamping process is controlled to last for 5 min-25 min; after forming is finished, the position of a pressing head is kept unchanged, pressure maintaining is performed on the plate, and the pressure maintaining process lasts for 5 min or less; the formed plate is taken out and air-cooled to the indoor temperature, and then warm forming treatment is completed. By means of the method, the forming performance and service strength performance of the aluminum alloy plate can be collaboratively improved.

Description

technical field [0001] The invention relates to a forming method of a 6XXX series aluminum alloy sheet for automobile body, the method can synergistically improve the formability and service strength performance of the aluminum alloy sheet. Background technique [0002] In recent years, under the background of the country's vigorous promotion of low-carbon environmental protection, energy conservation and emission reduction, the automobile industry is developing in the direction of green environmental protection and body weight reduction. Among them, increasing the aluminum rate of the body is one of the most effective methods. The 6XXX aluminum alloys typically represented by 6009, 6022, and 6111 have good paint hardening characteristics and good formability (compared to 2XXX series aluminum alloys), and are currently the preferred alloys for aluminum alloys for car bodies. They are used by Audi, BMW, and Jaguar. Land Rover, Ford and other major automobile manufacturers are...

AI Technical Summary

Problems solved by technology

However, the current research work on warm forming mainly focuses on the 5XXX series aluminum alloys and the improvement of their formability. There are few studies on the 6XXX series aluminum alloys, and it does not take into account whether the service strength performance meets the requirements.

[0007] Therefore, there is no method to synergistically improve the formability and service strength performance. In order to significantly improve the formability and service strength performance, deformation at a higher temperature than room temperature has become a more effective way.

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