Integral extrusion forming method of complex inner ring rib of light alloy shell

Abstract

The invention discloses an integral extrusion forming method of a light alloy shell body complex inner ring rib. The invention relates to an integral extrusion forming mold of the light alloy shell body complex inner ring rib, the mode comprises a lower flexible filling body inner support, and the lower flexible filling body inner support adopts a soft material to be made into a sand mold according to the shape of the lower part of the inner ring rib; a light alloy cylindrical part and the mold are heated and subjected to heat preservation, then the light alloy cylindrical part is placed intothe mold, an extrusion forming inner ring rib stage is entered, when the stage is finished, a press machine drives the mold to be separated from the inner ring rib, the light alloy cylindrical part isseparated from the mold, and finally, the temperature is controlled to enable the lower flexible filling body inner support to be discretized. According to the method, a material utilization rate isgreatly improved, the problem of difficulty brought by using a valving inner support structure material when precise plastic forming is carried out is overcome, the problem of blockage during mold stripping is solved, so that the effect of protecting the mold is achieved, and the simultaneous forming of the inner ring rib during integral plastic forming of the large-scale complex light alloy shellbody component.

Description

technical field [0001] The invention relates to the technical field of plastic processing and forming of metal materials, in particular to an extrusion forming method of inner ring ribs of a large complex light alloy shell. Background technique [0002] With the development of aerospace technology, the integration of large and complex light alloy shell components is becoming more and more intense. However, there are certain difficulties in the development of key complex shell components, which are manifested in: high development costs, long cycle time, low forming dimensional accuracy, mainly relying on machining to ensure accuracy; large and complex light alloy shell components are prone to defects during the forming process , large performance fluctuations, and unstable quality, resulting in low reliability and pass rate. The precise forming technology of key complex shell components in some advanced weaponry has not yet been broken through in China, and many key complex ...

AI Technical Summary

Problems solved by technology

During hot extrusion, part of the metal will flow into the gap of the split mold, forming burrs, resulting in the loss of part of the material and the jamming problem when the mold is released

At the same time, the processing and assembly requirements of the support structure mold in the split petal are relatively high, and it is difficult to realize accurately, such as Figure 2-2a shown

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