A process for treating residual aluminum in an aluminum profile extrusion die

Abstract

The invention provides a treatment technology for residual aluminum in an aluminum profile extrusion die. In a vacuum box, the mixture of nitrogen and powdered graphite is sprayed to the surfaces of an upper die and a lower die at the temperature of 660-1000 DEG C and 100m / s or higher speed, residual aluminum and oxidization layers on the surfaces of the upper die and the lower die are removed, and the melting point of aluminum is 660.37 DEG C. Spraying is carried out at the temperature of 660-1000 DEG C, residual aluminum on the surfaces of the upper die and the lower die can be molten whilenot affecting the structures and performance of the upper die and the lower die, therefore, residual aluminum is changed into small liquid drops, powdered graphite is adsorbed to the surfaces of the small liquid drops and mixed with the residual aluminum small liquid drops to enable the residual aluminum small liquid drops to not have caking property and roll to fall down, and therefore the residual aluminum on the surfaces of the upper die and the lower die is removed. Compared with the prior art, according to the treatment technology for residual aluminum in the aluminum profile extrusion die, residual aluminum is flexibly, efficiently and thoroughly removed, the cleaned die is smooth and clean, the treatment effect is remarkable, and practicability is high.

Description

technical field [0001] The invention relates to the field of residual aluminum processing technology, in particular to a residual aluminum processing technology in an aluminum profile extrusion die. Background technique [0002] At present, with the demand for light weight of large structural parts, more and more structural parts use aluminum extrusion dies. Due to the characteristics of aluminum extrusion dies and the melting and extrusion process adopted, the aluminum extrusion after melting There is a lot of residual aluminum in the mold. If the residual aluminum on the aluminum profile extrusion die is not removed in time, it will affect the use of the aluminum profile extrusion die. Therefore, measures must be taken to eliminate the residual aluminum on the aluminum profile extrusion die. The usual measures are as follows: one is to use the method of thumping or knocking on the surface during the melt extrusion process or after the melt extrusion is completed to elimin...

AI Technical Summary

Problems solved by technology

Although these methods have some effects, they all have limitations.

The original process uses a single-needle impact head, the processing efficiency is very low, and it often needs to be repeated seven or eight times, or even more. Secondly, the type of the injection head is single, and there is no distinction between impacting aluminum alloy or steel welds, let alone aluminum profiles. Due to the thickness of the extrusion die, the effect of the spray treatment is not ideal, and the practicability is not high, and the above-mentioned methods will basically cause damage to the surface of the die

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