Cold extrusion forming process and die for thin-walled pure aluminum camera shell

Abstract

The application discloses a cold extrusion forming process and a die for a thin-wall pure aluminum camera shell. The process comprises the following steps: taking a 1060 pure aluminum plate as a blank, sequentially performing surface pretreatment, extrusion sequence 1, annealing, surface reprocessing, extrusion sequence 2, and finally performing a small amount of machining to obtain a finished product. According to different extrusion sequences, the die matched with the method is divided into a floating radial extrusion die and a floating composite extrusion die. The two kinds of dies both comprise an upper die assembly, an intermediate floating die assembly and a lower die assembly. The floating radial extrusion die forms a radial extrusion cavity in the die closing process, completes the extrusion sequence 1 and obtains a radial extrusion forging blank. The floating composite extrusion die forms a composite extrusion cavity in the die closing process, completes the extrusion sequence 2 and obtains a composite extrusion forging blank. The application realizes that the radial extrusion and the composite extrusion share the same press frame, significantly reduces the die cost and is suitable for large-batch production of thin-wall pure aluminum camera shells in multiple scenes such as vehicle-mounted and security.

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