Regeneration repair method for tubular parts of die-casting machine

Abstract

The invention discloses a regeneration repair method for tubular parts of a die-casting machine. The regeneration repair method comprises the steps that bearizing is conducted, i.e., wear portions of the old tubular parts are eliminated through a turning lathe or a grinding tool; welding is conducted, i.e., the portions eliminated after the tubular parts are abraded are repaired with a bead welding method by adoption of an inner diameter automatic welding device; machining is conducted, i.e., the turning lathe and a grinder are reused for deep machining, so that the tubular parts are restored to be in an original size or a size required according to an original drawing; and surface treatment is conducted, i.e., nitrogen treatment is conducted on the surfaces of the tubular parts after regeneration repair, and the whole repair process is completed. According to the regeneration repair method for the tubular parts of the die-casting machine, by means of the independently developed special inner diameter welding technology, the bead weld regeneration repair becomes possible, the bead welding method is used for welding repair, and the tubular parts can be restored to be in the original size. The tube regeneration cost is 60-80% that of new products, regeneration can be conducted for three to five times, the cost can be effectively reduced, the repaired tubular parts are same as or longer than the new products in service life, and the regeneration repair is economical and protects the environment.

Description

technical field [0001] The invention belongs to the technical field of repairing tubular fittings of die-casting machines, and in particular relates to a method for regenerating and repairing tubular fittings of die-casting machines. Background technique [0002] The die-casting machine is a series of industrial casting machines that hydraulically inject molten metal into the mold under pressure to cool and form it, and obtain solid metal castings after the mold is opened. It was originally used for die-casting characters. With the advancement of science and technology and industrial production, especially with the development of industries such as automobiles, motorcycles and household appliances, die-casting technology has developed extremely rapidly from many aspects. The die-casting machine contains many tubular accessories, such as: material pipe (pressure chamber), punch (injection head), cylinder liner, etc. The tubular accessories in the die-casting machine will wear...

AI Technical Summary

Problems solved by technology

The die-casting machine contains many tubular accessories, such as: material pipe (pressure chamber), punch (injection head), cylinder liner, etc. The tubular accessories in the die-casting machine will wear to varying degrees after a period of use. Most of the repair techniques in the existing technology will enlarge the hole diameter of the repaired tubular fittings, so that the repaired tubular fittings cannot be restored to the original size, thus affecting the use of the die-casting machine. Errors will occur when the die-casting machine is used. The tubular fittings in the prior art can only be repaired 1-2 times at most, and then they can no longer be used, which greatly increases the cost of using the die-casting machine