An automatic pulse mig surfacing aluminum bronze method for upstream and downstream flanges

Abstract

The invention discloses an automatic pulse MIG aluminum bronze surfacing method for upstream and downstream flanges, which is realized by a movable welding robot performing automatic pulse MIG aluminum bronze surfacing welding on the inner surface of a fixed upstream and downstream flange, and uses the robot to teach the movement of the welding torch The trajectory, the height and angle of the welding torch nozzle, the first welding seam of the bottom layer is realized by robot teaching, and the welding seam other than the first welding seam of the bottom layer is realized by setting the offset size of the welding seam and the angle of the welding torch to realize automatic operation. The technological method of the present invention realizes the aluminum bronze surfacing welding of the upstream and downstream flanges of the pumped energy storage, greatly improves the welding versatility and operability, can effectively improve the quality of the weld seam, and improve the production efficiency.

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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