A method and device for determining the shape of a motor cover after stretching and rebounding

Abstract

The invention provides a method and a device for determining the shape of a motor casing after stretching and rebounding, including: establishing a stretched two-dimensional model of the motor casing in the XOZ plane according to the material forming process and the structural parameters of the motor casing; The stretched two-dimensional model is used to obtain a half-section two-dimensional model of the motor casing, and the half-section two-dimensional model is segmented to obtain a plurality of segment models; Circumferential rebound amount and radial rebound amount of the segmented model; calculate each segmented model in combination with the circumferential rebound amount and the radial rebound amount to obtain the A two-dimensional springback model is performed; the two-dimensional springback model is rotated along the Z axis to obtain a three-dimensional springback model of the motor cover. The purpose is to establish a three-dimensional model of the stretched motor cover after springback, which can directly reflect the shape characteristics of the motor cover, facilitate the measurement of workpiece size and error, and provide a reference for material forming process design and mold design.

Description

technical field [0001] The invention relates to the field of motor casing rebound, in particular to a method and device for determining the shape of a motor casing after stretching and rebounding. Background technique [0002] In the prior art, CAE software or experimental methods are generally used to simulate the stretching process of the motor casing, to obtain radial and circumferential stress, elastic strain, residual strain and deformation after springback, predict the shape and accuracy after springback, and establish The relationship between the shape and size of deep drawing and the shape and size of deep drawing and springback guides the drawing process design, but CAE modeling is difficult, high cost, low efficiency, poor accuracy, or the experimental sample method and the technical measurement method are used to measure the motor cover After the shell is stretched and rebounded, the shape and precision are reversed, and the amount of rebound is reversed, and the ...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, CAE software or experimental methods are generally used to simulate the stretching process of the motor casing, obtain the radial and circumferential stress, elastic strain, residual strain and deformation after springback, predict the shape and accuracy after springback, and establish The relationship between the shape and size of deep drawing and the shape and size of deep drawing rebound guides the drawing process design, but CAE modeling is difficult, costly, low in efficiency, and poor in accuracy, or use experimental samples and technical measurement methods to measure the motor cover The shape and accuracy of the shell after stretching and rebounding, reversely calculate the amount of springback, and establish the relationship between the stretched shape size and the deep-drawing rebound shape size, the cost of the experiment is high

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