Manufacturing method of unequal-wall-thickness curved surface part

Abstract

The invention discloses a manufacturing method of an unequal-wall-thickness curved surface part. The method comprises the steps that a three-dimensional model of the curved surface part is built, theposition required to be machined is subjected to size accumulation according to the machining allowance, and a three-dimensional model to be decomposed is formed; the three-dimensional model to be decomposed is unfolded to form a plane model to be decomposed, according to different thicknesses, dismounting is carried out, and data modules with uneven thicknesses can be formed; according to the size of the data modules, corresponding solid modules are formed through machining, a fusion welding method is adopted for installing and assembling the solid modules with the unequal thicknesses, and anunequal-wall-thickness plane workblank is formed; the plane workblank is put on a hot forming mold to be preheated, press fitting is carried out through a press machine, and a curved surface workblank is formed; and the curved surface workblank is subjected to finish machining to form a curved surface part finished product. Through one-time thermal forming, forming of the unequal-wall-thickness curved surface part can be achieved, the development process of the part is shortened, the development cost is reduced, the thermal forming has the effect of removing stress, and the heat treatment isnot needed.

Description

technical field [0001] The invention relates to the technical field of processing and manufacturing curved surface components, in particular to a method for manufacturing curved surface components with unequal wall thickness. Background technique [0002] In recent years, titanium alloy components with complex structures have been widely used, and the types of parts are no longer limited to simple sheet metal parts and machined parts. Some parts have the characteristics of both sheet metal parts and machined parts. For example, a certain titanium alloy curved surface part used for aircraft in the aerospace field has a frame with a large thickness and unequal thickness on its four sides, and a skin with a rib structure in the middle. The current manufacturing method for this structure is, First, the parts are disassembled according to the structure, and then the finished components are formed through processes such as thermoforming, rough machining of the shape, combined tail...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned manufacturing method, the precision matching problem of the hot-formed parts must first be solved, because there is a difference between the forming precision of the middle thin-walled part and the forming precision of the large-thickness frame. Dimensional mismatch prevents welding or assembly

In addition, most of the butt joints between the component frame and the skin part of the structure have uneven wall thickness, which brings difficulties to welding. It is necessary to equalize the thickness of the model to ensure the welding quality

The third problem is that after welding, in order to ensure the surface accuracy of the parts and the performance of the weld seam, heat treatment must be performed on the welded blank

The above problems lead to high development cost and long development cycle of this type of component. At the same time, the matching accuracy of different formed parts is not easy to guarantee

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