Nitrogen protective continuous type brazing furnace

Abstract

The invention discloses a nitrogen protective continuous type brazing furnace. The brazing furnace comprises a rack and a furnace body which is fixed to the rack and internally provided with a furnace chamber; the furnace body is provided with an inlet and an outlet which are used for entering the furnace chamber, nitrogen sealing mechanisms are arranged at the inlet and the outlet, one end of a conveying belt is provided with a feeding mechanism used for jacking a brazed object to the conveying belt, the other end of the conveying belt is sequentially provided with an air cooling region and a water cooling region which are located on the conveying belt, the furnace chamber is internally provided with a pre-heating region and a heating region, and the heating region is provided with a heating nozzle and an air-conveying fan which can blow hot air to the pre-heating region. Compared with the prior art, structures such as a traditional spraying region and a drying region are saved, the mechanical structure is simplified, the heating efficiency inside the furnace is improved by using a recycling fan, by means of the air-conveying fan, the heat of the heating region can be directly blown to the pre-heating region, the energy is saved, an air-cooling then water cooling method is adopted on a cooling segment, cooling water is prevented from leaking into the furnace body, and the brazing efficiency and quality are improved.

Description

【Technical field】 [0001] The invention relates to the technical field of brazing processing equipment, in particular to a nitrogen-protected continuous brazing furnace used for processing automobile air conditioners. 【Background technique】 [0002] The brazing furnace is a kind of equipment for effectively connecting the various parts of the automobile air conditioner. It is welded by utilizing the characteristic that the melting point of the solder alloy is lower than the melting point of the furnace material in the furnace body. The solder is usually placed near or inside the welding surface of the part to be connected, and the brazing flux is coated between the parts and the welding surface and on the surface. After installation and drying, the parts are heated under the protection of a certain inert gas until the brazing alloy melts and the parts The temperature at which metals do not melt. The inert gas used is generally nitrogen. At the same time, the brazing flux b...

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Problems solved by technology

[0003] Brazing furnace generally includes vacuum brazing furnace and continuous brazing furnace. In the lower part area, the connecting parts are first dried in the drying furnace, and then enter the brazing area through the conveyor belt for heating and welding. The structure is complex, and there are disadvantages such as low heating efficiency, long welding time, and energy waste. Moreover, the above-mentioned pre-cooling zone is a water-cooled box with a water-cooled structure. The furnace of the brazing furnace passes through the inside of the water-cooled box. The furnace and the water-cooled box are sealed and connected. Export

If it is used for a long time, water leakage is prone to occur at the connection between the water cooling box and the furnace, which will damage the workpiece and is very unsafe to use.

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