Intermittent type gas protecting soldering furnace

Abstract

The invention discloses an intermittent gas protecting braze welding furnace, comprising an upper part area, a heating and drying area, a preheating and purifying area, a heating and braze welding area, a cooling area, a lower part area and a driving belt. The preheating and purifying area is provided with an inert gas inlet. The heating and braze welding area is provided with an internal heat recycling wind machine that makes the inert gas preheated in the preheating and purifying area go evenly into the heating and braze welding area. The heating and drying area, inside which a heating device is arranged, will heat and dry a pretreated workpiece that is delivered from the upper part area, and then delivers the workpiece to the preheating and purifying area so that the workpiece can be treated , and the workpiece will be braze welded in the heating and braze welding area. The cooling area will cool the workpiece delivered from the heating and braze welding area, and then delivers the workpiece to the lower part area. The staying time of the workpiece in every area is adjusted by the driving belt and is determined by the time that the heating and braze welding area needs. The invention is quite flexible, can meet the processing requirements of the workpieces of different specifications and kinds, and can conveniently adjust the braze welding parameter in every area with fast reaction to the temperature changes and wide application.

Description

1. Technical field [0001] The invention relates to a brazing furnace for effectively connecting various components such as an aluminum heat exchanger, in particular to an intermittent gas shielded brazing furnace. 2. Background technology [0002] The aluminum brazing furnace is a kind of equipment for effectively connecting the various parts of the aluminum heat exchanger. It is welded by utilizing the characteristic that the melting point of the aluminum solder Al-Si alloy is lower than the melting point of the Al metal material of the component. The brazing filler metal is usually placed near or inside the welding surface of the part to be connected, and NOCOLOK aluminum brazing flux is coated between the parts and the welding surface and on the surface. After installation and drying, the parts are heated to brazing under the protection of a certain inert gas atmosphere. The temperature at which the alloy melts but the metal of the component does not melt. At the same ti...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing brazing furnaces adopt continuous type. The brazing furnace with this structure has a large installed electrical capacity, and the start-up work is slow, usually taking more than ten hours. The temperature dynamic response is slow, and it takes more than one hour or even several hours. It is suitable for the processing of large quantities of workpieces, but it has the following disadvantages: poor flexibility, it is difficult to meet the requirements for workpieces of different specifications and varieties, when changing workpiece specifications and varieties, it is difficult to adjust various parameters, and the adjustment period is long. Material consumption is high ;Especially difficult for brazing of copper workpieces

Images