Method for forming aluminum alloy large-size disc type forged piece through local forging

Abstract

The invention discloses a local forging forming method for large-scale aluminum alloy disc forgings. The steps are as follows: firstly, an inner washer and an outer washer are manufactured for partial forming, and the inner wall of the outer washer and the outer wall of the inner washer are in an α-angle with a horizontal worktable. Then put the upsetting, punching, and pre-rolled rectangular thick-walled intermediate blank on the outer gasket and inner gasket for partial forging respectively, and then flatten the intermediate blank to complete the first partial forging; then follow the same steps for The other end face of the intermediate billet is subjected to a second local forging, and so on, and finally a large aluminum alloy disc forging is obtained. The method can overcome the lack of equipment capacity, and obtain aluminum alloy large disk forgings with good shape, size, structure and performance. This method is used for forming large disk forgings.

Description

technical field [0001] The invention relates to a forging forming method, in particular to a local forging forming method of a large aluminum alloy disc forging. Background technique [0002] Large disc forgings are mainly used as key components in aviation, shipbuilding and other fields. The forgings are large and heavy, difficult to form, high in production cost and high in quality requirements. At present, my country's large-scale forging industry has the characteristics of scattered productivity, low production efficiency, aging equipment, low production capacity, and low level of mechanization. At present, it is still mainly relying on innovative technology to achieve "small equipment to do big work". For this reason, the optimization of the process is essential important. Commonly used forming methods for large cake forgings include: lower flat anvil drawing length, upper flat anvil lower V-shaped anvil drawing length, upper and lower V-shaped anvil drawing length, WHF...

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Problems solved by technology

During the forming process, the contact surface between the anvil and the workpiece is relatively fixed, and it is easy to produce obvious axial and transverse tensile stress, which is not conducive to the elimination and repair of internal void defects and is easy to induce microcracks. At the same time, the metal flow direction is single, lacks continuity, and the mechanical properties The anisotropy is serious, and the uniformity of forming cannot be guaranteed; because the contact surface between the anvil and the workpiece is relatively fixed, the load of the press remains high, and the production capacity of the press cannot be fully utilized. The productivity is low, which increases the difficulty of forming

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