Automatic pulsating MIG aluminium bronze surfacing method for upstream and downstream flanges

Abstract

The invention discloses an automatic pulsating MIG aluminium bronze surfacing method for upstream and downstream flanges. The method is realized in the way that a movable welding robot conducts automatic pulsating MIG aluminium bronze surfacing on the inner surfaces of the fixed upstream and downstream flanges. By using the robot teaching welding gun motion trails, welding gun nozzle heights and angles, a first welded joint of a priming coat is welded by means of robot teaching, and welded joints apart from the first welded joint of the priming coat can be automatically operated by setting welded joint offset dimensions and welding gun angles. By adoption of the technological method disclosed in the invention, pumped storage upstream and downstream flange aluminium bronze surfacing can beachieved, welding universality and operability are greatly improved, the quality of the welded joints can be effectively improved and production efficiency is also improved.

Description

Technical field: [0001] The invention relates to the field of pumped water storage, in particular to an automatic pulse MIG surfacing welding method for aluminum bronze on upstream and downstream flanges. Background technique: [0002] Surfacing aluminum bronze on the side wall of the upstream and downstream flanges of the pumped storage ball valve can improve the anti-wear performance of the surface. The traditional manufacturing process is to use manual surfacing welding, or use a welding trolley to cooperate with a positioner to surfacing welding on the flange surface, and there are the following problems: [0003] 1) There is a large difference in physical properties such as thermal expansion coefficient between aluminum bronze and dissimilar material base material, poor weldability, high welding repair rate, unstable manual surfacing welding quality, and stable quality welding process is required; [0004] 2) The surfacing welding of the inner wall of large flange part...

AI Technical Summary

Problems solved by technology

[0003] 1) There is a large difference in physical properties such as thermal expansion coefficient between aluminum bronze and dissimilar material base material, poor weldability, high welding repair rate, unstable manual surfacing welding quality, and stable quality welding process is required;

[0004] 2) The surfacing welding of the inner wall of large flange parts needs to cooperate with a large positioner, which increases the manufacturing cost, and it is necessary to ensure that the workpiece does not move or moves a little;

[0005] 3) Harmful aluminum bronze steam is produced during the welding process, which endangers the health of welders and requires automatic welding;

[0006] 4) The traditional aluminum bronze surfacing process requires high welding preheating temperature, which directly affects production efficiency;

[0008] In the above background, there is an urgent need for an automatic pulse MIG surfacing aluminum bronze method for upstream and downstream flanges, but the current aluminum bronze surfacing welding process experience is insufficient, and there is no relevant manufacturing experience in China for multi-layer and multi-channel automatic pulse MIG surfacing welding of aluminum bronze.

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