Method for restoring surface defects of casting machine after machining

Abstract

The invention discloses a method for restoring surface defects of a casting machine after machining, which comprises the following steps: painting a copper plating protection layer on the surface around the defect on the surface of the casting machine after machining and / or on the surface of the defect; then resurfacing welding the defect to cause a defect repair welding point to be higher than the surface of the casting machine; and carrying out plane milling and / or grinding processing at the part of the repair welding point higher than the surface of the casting machine until the repair welding point has the same process dimension with the surface of a basal body. The process is a composite type restoring technique expanded on a common restoring process, and the repair welding point is well combined with a parent material, has equivalent rigidity with the parent material, and has the basically same color and luster with the parent material. The method not only avoids the hazards of part deformation, cracking and the like easily caused by singly adopting an argon arc welding method, but also avoids the problems of long restoring time, weak combination with the parent material and the like caused by singly adopting an electric brush plating method.

Description

technical field [0001] The invention belongs to a method for repairing defects of parts, in particular to a method for repairing surface defects in machining of castings. Background technique [0002] Casting production has to go through a very complex process. As long as one of the procedures or a certain process is wrong, it will cause casting defects. The same type of defects often have different causes due to different occasions and parts. This intricate situation brings great difficulty to the accurate judgment and analysis of casting defects and the corresponding improvement measures. All foundry manufacturers hope to produce castings without defects to meet the service requirements. In fact, due to the continuous development of products, the structure is becoming more and more complex, and the requirements for casting quality are getting higher and higher, which inevitably brings difficulties to casting production, and the probability of casting defects also increas...

AI Technical Summary

Problems solved by technology

[0009] Then, for finished parts that have been machined with high surface technical requirements but relatively large defects, what method should be used to repair their surface defects, and there is no relevant literature record yet.