Stepped annular part high-precision butt joint circular welding inner supporting tool and design method and welding method thereof

Abstract

The invention provides a stepped annular part high-precision butt joint circular welding inner supporting tool and a design method and welding method thereof. Two sets of supporting petals are designed for two parts, and the outer diameter of each set of supporting petals is the same as the inner diameter of the corresponding supporting part; two sets of staggered wedge-shaped transmission shafts are designed, and a main shaft is sleeved with the wedge-shaped transmission shafts and used for driving the supporting petals to support outwards; and two flanges with locking bottoms are designed at the two ends and can be inserted into the inner sides of the ends of two parts for clamping and fixing, and finally welding of butt joint circular welds is completed. The stepped annular part high-precision butt joint circular welding inner supporting tool solves the problems of easy misalignment, substandard coaxiality and roundness and the like after welding of stepped circular welds with butt joint interface size differences, is suitable for high-precision butt joint circular welding and auxiliary post-welding fine machining of stepped variable-diameter annular (cylindrical or non-cylindrical) parts with butt joint welded junctions with size differences, can guarantee the weld quality and the post-welding shape and position size effectively and can improve the welding efficiency remarkably.

Description

technical field [0001] The invention relates to a high-precision butt ring welding inner support tooling of stepped ring parts, a design method and a welding method thereof, and belongs to the field of welding technology. Background technique [0002] At present, with the continuous development of aerospace and other fields, the shape and structure design of various high-speed aircraft is becoming more and more complicated, and most of them are structures with large curvature and variable cross-section. Products often need to use different methods such as superplastic forming, thermal expansion and setting to complete the manufacture of various parts, as shown figure 1 As shown, the annular parts manufactured in different forms are finally welded by butt welding. However, for annular parts formed in different ways, there are often differences in the dimensions of the butt joints of the two parts, and the dimensions of each part meet the tolerance requirements. A certain doc...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems such as easy misalignment of the stepped girth welds after welding with differences in the size of the butt joints, coaxiality and roundness are not up to standard, the present invention proposes a high-precision butt girth welding inner support tooling for stepped ring parts and its The design method and welding method are suitable for high-precision butt ring welding and auxiliary post-welding finishing machining of stepped and variable-diameter ring (cylindrical or non-cylindrical) parts with different sizes of butt welds, which can effectively ensure the weld Seam quality, shape and size after welding, and can significantly improve welding efficiency

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