Local attaching piece repairing method for metal tool

Abstract

The invention discloses a local attaching piece repairing method for a metal tool. The metal tool has a position to be repaired, and the repairing method for the position to be repaired comprises the steps that 1, the size of the position to be repaired is determined; 2, an attaching piece is selected; 3, the single-side molded surface of the attaching piece is milled according to the molded surface of the position, to be repaired, of the metal tool, wherein the single-side molded surface makes contact with the molded surface of the position, to be repaired, of the metal tool; 4, a plurality of welding holes are evenly formed in the attaching piece, and chamfers are arranged on the edge of the attaching pieces; 5, the single-side molded surface of the attaching piece and the position, to be repaired, of the metal tool are positioned; 6, the edge of the attaching piece and the welding holes are welded to enable the attaching piece to be welded to the position, to be repaired, of the metal tool; and 7, after welding is finished, the surface of the attaching piece is machined to form a molded surface meeting requirements. By means of the repairing method, the machining and production efficiency of the metal tool is improved, the production cost is reduced, and the purpose of repeatedly utilizing the metal tool is achieved. The repaired position has the beneficial effects of being high in durability, high in connecting strength and the like.

Description

technical field [0001] The invention relates to a method for repairing the profile of a manufactured tooling, in particular to a partial patch repairing method for a metal tooling. Background technique [0002] The forming tooling of a large number of parts often needs to be partially trimmed due to the interference of the parts during the assembly process or the deformation during the manufacturing process. If it is necessary to further mill the tooling, the machine tool can be processed according to the reserved processing benchmark Processing or repositioning, secondary processing is performed on the basis of the reserved thickness of the original tooling surface. However, if a small-scale local profile needs to be increased or thickened beyond the reserved thickness of the existing tooling profile, the method of repairing the profile after patching with polymer adhesives and reinforcing fibers is commonly used at present, but the relationship between polymer adhesives an...

AI Technical Summary

Problems solved by technology

However, if a small-scale local profile needs to be increased or thickened beyond the reserved thickness of the existing tooling profile, the method of repairing the profile after patching with polymer adhesives and reinforcing fibers is commonly used at present, but the relationship between polymer adhesives and metal tooling Adhesion is poor, and the difference in expansion coefficient between the two at the molding temperature of the part will lead to cracking or separation of the repair, which not only affects the molding quality of the part, but also needs to be repaired after each part is manufactured, which increases the processing and production time , when some tooling repairs still fail to meet the manufacturing requirements, the tooling will be scrapped, resulting in a waste of manufacturing costs for large-scale tooling (especially high-cost INVAR steel material tooling), and remanufacturing new tooling will delay the production progress of the parts

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