Automatic flame brazing machine for copper and aluminum welding

Abstract

The invention discloses an automatic flame brazing machine for copper and aluminum welding, which comprises a multi-station turntable mechanical structure, an electrical control system, a gas flow control system, a six-axis robot control heating flame gun and an automatic wire feeding mechanism, and is characterized by comprising a welding wire head shearing component, after wire feeding is completed, a wire feeding nozzle returns to an initial position, and the welding wire head shearing component is cut off. And the cutting component cuts off the welding wire head. Automatic copper-aluminum flame brazing of multiple types of aluminum micro-channel heat exchangers is achieved, manual operation can be replaced, the production efficiency is improved, and the welding quality stability applied to the products of the type is improved.

Description

technical field [0001] The invention relates to the field of automatic flame brazing machines, in particular to an automatic flame brazing machine used for copper-aluminum welding. Background technique [0002] With the continuous improvement of performance requirements in the field of air conditioning, aluminum microchannel heat exchangers have gradually become a development trend due to their high heat transfer efficiency, saving raw materials, compactness and lightness. A very important process in the production process of aluminum micro-channel heat exchanger is the copper-aluminum brazing process of aluminum base and copper tube. The quality of brazing has a very important influence on the heat exchange performance of the heat exchanger. The brazing process has poor process consistency due to many parameters, process states and poor assembly process consistency, and process control problems often occur. [0003] CN104858528A discloses a welding equipment, including a p...

AI Technical Summary

Problems solved by technology

[0006] In the copper-aluminum welding of aluminum micro-channel heat exchangers, due to the great difference in the physical and chemical properties of copper and aluminum, welding is difficult

In addition, due to the thin thickness of the aluminum tube in the solder filling area and the fast heat dissipation of the aluminum material, the high local temperature is easy to burn the aluminum material, and the stability of the control of the size of the burner is higher.

Using the automatic flame brazing machine developed by the existing technology, the result of copper-aluminum welding trial for this type of micro-channel heat exchanger is that automatic welding cannot be realized, or the welding wire does not melt, or the phenomenon of aluminum base burning often occurs. The quality does not meet the requirements

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