Finite element model and method preventing part from moving during forming

Abstract

The invention provides a finite element model and method preventing a part from moving during forming. The finite element model comprises a web face of the part, free-shaped locating lugs and locating holes. The two ends and the middle of the part are provided with rectangular locating lugs respectively, and the size of the locating lugs is determined according to the size of the part; each locating lug is provided with two locating holes which are in the same line, meanwhile the angle between the two locating holes and the bottom edge of each locating lug is 45 degrees to ensure that locating is firm and stable; the locating holes at the upper portions of the locating lugs of the two sides are next to the sunken positions of the web face. According to the finite element model and method preventing the part from moving during forming, manual sizing of workers can be reduced, and the surface quality of products is improved; the production efficiency of architrave parts is improved, and the requirements for large-batch and fast-pace production efficiency are met.

Description

technical field [0001] The invention belongs to the field of sheet metal forming, and relates to a finite element model and a method for preventing parts from moving during forming. Background technique [0002] At present, in the design process of aircraft parts, there are gradually more and more parts with arc-shaped flanges, extremely narrow flanges, and sags on the flanges. Such parts are difficult to form and are prone to dragging during the hydroforming process of parts. , serious deformation, misalignment, inaccurate positioning, serious torsional deformation, and irreparable phenomena, and the subsequent heat treatment deformation is more serious. These problems can only be scrapped and cannot be repaired. [0003] At present domestically and internationally, only hydroforming can be used for parts with long circular arc-shaped webs with narrow bends and subsidence. During the hydroforming process, there are still serious parts torsion, dragging and deformation, whic...

AI Technical Summary

Problems solved by technology

Springback affects the external dimensions of parts, which will cause problems such as uncoordinated assembly and unstable assembly quality

There is another significant problem in the rubber bag hydroforming process: inaccurate positioning and serious dragging during the forming process, which will also cause a large number of unnecessary manual corrections, seriously affecting the company's production efficiency and the fatigue life of sheet metal parts. Numerical simulation technology can not only study the rebound problem in the rubber bag hydroforming process, but also simulate the positioning method and the position of the positioning hole

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