Abstract
In order to reveal the influence of different processing procedures on the machining deformation of the whole structure of aviation frame type, a prediction model for the deformation of frame type integral structure caused by initial residual stress was established based on finite element. According to the deformation law of frame parts caused by initial stress of blank, the deformation of whole structure parts based on aviation frame is minimized. The influence of processing process on deformation of frame structure is studied. The results show that when removing the frame material, the deformation of the workpiece can be slowed down by first removing the area with large deformation and relatively concentrated material. And symmetrical removal of the frame material can also slow the deformation of the workpiece.
Highlights
With the rapid development of modern aviation industry, the use of aircraft structural parts has put forward higher requirements, and more and more integral structural parts have been adopted
Symmetrical removal of the frame material can slow the deformation of the workpiece
The paper analyzes the deformation problem of the structure parts of aviation integral frame caused by different processing technology sequence of spacer frame
Summary
With the rapid development of modern aviation industry, the use of aircraft structural parts has put forward higher requirements, and more and more integral structural parts have been adopted. There are many factors that lead to the deformation of the whole structural parts, the analysis of a series of research results and the field investigation shows that the initial residual stress is the main factor causing the deformation of the whole structural parts [4]. Wu Yunxin[7] established a three-dimensional finite element model for predicting the milling deformation of aviation aluminum alloy thin wall parts. The main features of the frame parts are the following: the shape is relatively large, its bearing force is relatively large; the box is numerous and complex; thin-walled structure, processing easy deformation; divided into single-sided frame and double-sided frame, its structure is basically symmetrical up and down or left and right. The deformation law of workpiece caused by initial stress of blank is analyzed, and the influence of different frame processing technology on the deformation of workpiece is studied
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