Optimization design method for preforming technology of turbine disk forgings

Abstract

The invention discloses an optimization design method for preforming of turbine disk forgings. The method comprises the steps that 1, the geometrical shape of a preforming die is designed, the size of the preforming die is parameterized, and a Plackett-Burmans (PB) experiment design method is utilized to determine key influence parameters; 2, the key influence parameters determined in the step 1 are used as optimization parameters, and a general rotary combination design method is adopted to determine experiment schemes; 3, a finite element method is adopted to perform simulation on all the schemes to obtain an experiment result, a second-order response surface model is utilized to fit out a response surface, optimizing is performed based on an optimization objective function for optimizing to find out an optimal parameter combination. Through the method, the preforging forming technology of turbine disks can be effectively optimized, and it is guaranteed that deformation of the forgings and uniformity of organization are optimal.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of forging, and relates to an optimal design method of a turbine disk forging preforming process [0003] Background technique: [0004] The turbine disk is the core component of the aero-engine, and it is also the part with the most extreme working environment among the four types of hot-end components. Its working temperature is high, the change is large, and the stress state is very complicated, so it puts forward high requirements on the performance of the turbine disk. , which leads to the manufacturing technology of the turbine disk has always been a difficult problem in the field of aero-engines in my country. [0005] Due to the complex structure of the turbine disk, it is a typical difficult-to-form part, and the manufacturing difficulty is relatively high. It is difficult to forge the blank into the shape of the final turbine disk in one process. Even if the mold can be filled, it is difficul...

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