A preparation process of solder suitable for rapid repair of cold stamping dies and inserts

Abstract

The invention provides soldering flux applicable to quick restoration of cold-punching dies and inserts and a preparation process of the soldering flux. The soldering flux comprises, by weight, 15-20% of aluminum, 1-5% of chromium, 1-5% of manganese, 1-3% of iron and the balance of copper and inevitable impurity. The preparation process of the soldering flux includes steps of continuously casting blank metal bar in the diameter of 3-6 mm in a horizontal or vertical continuous casting manner, and grinding and polishing the blank metal bar so as to be directly used as soldering flux for quickly restoring the cold-punching dies and the inserts. The soldering flux used for quickly restoring the cold-punching dies and the inserts has the advantages of short restoration time, less post-welding defects, good mobility during welding, less deformation and cracking and capability of preventing scratch or drag damage and the like. The cold-punching dies and the inserts after restoration can be further used more than 30,000 times.

Description

technical field

[0001] The invention belongs to the technical field of metal material processing, and provides a solder suitable for rapid repair of cold stamping dies and inserts and a preparation process. Background technique

[0002] Cold stamping dies and inserts are mostly special tools installed on the press, which apply deformation force to the sheet placed inside at room temperature to deform it, so as to obtain products of certain shape, size and performance.

[0003] At present, most of the materials for manufacturing cold stamping dies and inserts are mainly steel. The types of commonly used die working parts materials are: carbon tool steel, low alloy tool steel, high carbon high chromium or medium chromium tool steel, medium carbon Alloy steel, high speed steel, and hard alloy steel, etc.

[0004] The cold stamping die and the insert exert pressure on the sheet during the movement of the press, so that the sheet can complete the separation process (blanking, pu...