Efficient horizontal position welding process method for pumping storage seat ring fixed guide vane

Abstract

The invention discloses an efficient horizontal position welding process method for a pumping storage seat ring fixed guide vane. Firstly, the seat ring fixed guide vane with the thickness of 150-260 mm is processed into a narrow gap groove with the width of 10-25 mm, robot narrow gap gas shield welding accessibility is simulated offline, welding path programming is carried out, two sections of a seat ring are stacked, the seat ring is placed at a horizontal position, the narrow gap groove is welded to 1 / 4-1 / 3 depth after alternate backing welding, back gouging and fillet welding are conducted on the back face, and then the narrow gap groove is welded alternately. In the welding process, two paths are welded on each layer, the lower path is welded firstly, then the upper path is welded, a robot programming position register is used for achieving welding path automatic deviation, a weld pool edge linear image obtained through a CMOS welding camera is used for judging and adjusting welding deviation, and the problem about the fusion quality of the side wall of efficient robot narrow gap horizontal welding of the seat ring is solved. Compared with conventional manual welding, the welding amount is reduced by 60%-80%, the procedure of turning over the seat ring in a reciprocating manner is omitted, and the production efficiency is improved by 1-2 times under the guarantee of the stable and reliable welding quality.

Description

technical field [0001] The invention relates to the field of manufacturing seat rings of power generation equipment, in particular to a high-efficiency horizontal welding process for fixed guide vanes of pumping storage seat rings. Background technique [0002] In recent years, pumped storage power stations have been rapidly constructed and developed due to their role in peak regulation and valley filling. The seat ring is a key large-scale structural part of the pumped storage unit, which is mainly composed of a plurality of fixed guide vanes, an upper ring plate and a lower ring plate assembled and welded. As the installed capacity increases, the thickness of each part of the seat ring increases significantly, and the thickness of the weld seam is as high as 150-250mm. The traditional multi-layer multi-pass welding has a large amount of welding filling, which brings great welding deformation and residual stress. High quality risks such as cracks. Manual welding is labor-...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of high labor intensity, low production efficiency, and unstable quality in welding the fixed guide vane of the seat ring in the background technology, the present invention provides a high-efficiency horizontal welding process for the fixed guide vane of the pumping storage seat ring, which is characterized by the following steps:

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