Ellipsoid tank bottom flange hole milling, flange welding assembly

Abstract

The invention provides an ellipsoidal tank bottom flange hole milling / flange plate welding assembly; a clamping fixture of the ellipsoidal tank bottom flange hole milling / flange plate welding assembly comprises a clamping fixture base fixed on a cross positioner; a plurality of axial hold-down blocks capable of holding down an outer edge of a stepped fork ring on the bottom of an ellipsoidal tank in an axis direction of the clamping fixture base are arranged on the clamping fixture base; further, a plurality of radial tightly-propping devices for tightly propping against an inner wall of the stepped fork ring on the bottom of the ellipsoidal tank are further arranged; and a welding manipulator and a milling head both are arranged on a gantry. The ellipsoidal tank bottom flange hole milling / flange plate welding assembly guarantees, by means of the dual functions of the axial hold-down blocks and the radial tightly-propping devices, guarantees secure clamping positioning of the tank of the ellipsoidal tank without loosening easily; by means of once clamping, all flange hole milling and flange plate welding operations on the bottom of the ellipsoidal tank can be completed; convenient operations and low labor intensity are realized; assembling positioning errors caused by multiple clamping positioning are avoided, and the accuracy and efficiency of milling and welding are overall improved.

Description

technical field [0001] The invention relates to a rocket ellipsoid tank processing technology, in particular to an ellipsoid tank bottom flange hole milling and flange plate welding assembly. Background technique [0002] The bottom of the rocket ellipsoid tank is generally welded by eight melon petals and a fork ring, and flange holes of different heights are opened on it according to the needs. After the flange holes are milled, they are matched to weld the flanges. , when welding, use a special fixture to clamp and position the bottom of the rocket ellipsoid storage tank, fix the relative position between the flange and the bottom of the tank by tightening the upper and lower pressure plates, and then let the worker hold the welding torch, using the "two-sided three-layer welding" process Do the welding. [0003] The following problems exist in the process of opening flange holes and welding flanges: [0004] The flange hole is drilled and reamed with a hand-held pneuma...

AI Technical Summary

Problems solved by technology

[0004] The flange hole is drilled and reamed with a hand-held pneumatic drill, which is very inefficient, and the matching precision between the flange hole and the flange plate is low, and the place with a large gap is easy to crack due to the release of residual welding stress after welding; some welding The seam is far away from the edge of the ellipsoidal box bottom, and it is difficult for workers to perform welding operations in a more comfortable body posture; manual back sealing welding is performed on the inner side of the box bottom, and the working environment is particularly harsh; manual welding has many times of arc start and end, which is prone to defects; The welding quality depends on the operating level and experience of the operator, and the quality of the weld is poor in stability

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