Shaping method of safety air bag gasifier pressure cover

Abstract

The invention discloses a method for forming a gas generator gland of an air bag, which comprises the steps of pre-heating an aluminum alloy blank to 160 DEG C-190 DEG C, dipping in sticky lubricant, drying and heating the aluminum alloy blank to 440DEG C-460DEG C, keeping the temperature, and putting in a forging die for press forming. In the forming process, the outer ring of the workpiece bears additional external force in a direction opposite to the plastic flow direction of the workpiece. The additional external force is applied by a hydraulic or pneumatic or spring mechanism through controlling a gliding block on the bottom of a die cavity. The method is applied to processing the gas generator gland of the air bag, improves product precision and production efficiency, prolongs the service life of dies, reduces production cost, and is particularly suitable for automatic production on a large scale.

Description

Forming method of airbag gas generator gland technical field The invention relates to a forging and pressing forming process of an aluminum alloy part, in particular to a forging and plastic forming method for a gland of a safety airbag gas generator. Background technique The airbag gas generator is a key component of the automobile safety system, and its cover and housing are combined to form a container for the airbag priming agent and gas-generating agent. The material of the gland is aluminum alloy, and it generally has an inner and outer ring structure. The wall thickness of the outer ring is greater than that of the inner ring, and the height of the outer ring is smaller than that of the inner ring. At present, the forming methods of the gland include machining methods and casting methods. The former has low material utilization rate, occupies more equipment, low production efficiency, and high cost. The latter has moderate material utilization rate, occupies less eq...

AI Technical Summary

Problems solved by technology

At present, the forming methods of the gland include machining methods and casting methods. The former has low material utilization rate, occupies more equipment, low production efficiency, and high cost. The latter has moderate material utilization rate, occupies less equipment, and low cost, but the mechanical properties of parts Poor, the two methods are only suitable for trial production of samples

In addition, there is also a forging method, in which the heated aluminum alloy billet is pressed into a forging die. This method saves materials and has high production efficiency. However, in the existing forging method, only one heating is performed, and the material is not heated uniformly, and the plastic fluidity is not good. It is better, and the inner and outer ring cavities in the mold are fixed. Due to the difference in the size of the inner and outer rings of the workpiece, the material first flows to the outer ring cavity, and it is more difficult to flow to the inner ring cavity, which leads to mold The unbalanced force reduces the service life and also affects the processing accuracy of the product