Vacuum brazing furnace

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Vacuum brazing is used to construct high temperature strength material system, which has the advantages of no pollution, energy saving, improving production efficiency and improving working environment, so it has been widely used in industrial production. At present, it is developing towards large-scale and all-digital integration.

Vacuum brazing, refers to the workpiece heating in a vacuum room, mainly used for high quality products and easy to oxidize materials welding. A vacuum brazing furnace includes a pressure vessel having a cylindrical side wall and a door of a size and position designed to enclose one end of the cylindrical side wall. The workpiece handling system is mounted on the pressure vessel door to support the metal workpiece for heat treatment or brazing. A workpiece processing system includes a device for turning the workpiece during processing. A vacuum system can be connected to the workpiece so that the pressure inside the workpiece is below atmospheric pressure during brazing.

Vacuum furnace system is mainly composed of vacuum system, heating system and related control equipment. Vacuum system used to meet the vacuum brazing process requirements of vacuum degree; The heating system heats the parts and melts the solder to complete the brazing of the parts.

The main machine of vacuum brazing furnace is horizontal and single indoor heating structure, which is composed of furnace body, heating chamber, vacuum system, air cooling system, air charging system, partial pressure system, water cooling system, electrical control system and so on.

Due to the uniform heating of the whole parts, the thermal stress is small, the deformation can be controlled to the minimum, so as to obtain dense joints with excellent mechanical properties and corrosion resistance, suitable for the connection of precision products; And because of the vacuum brazing, can play a protective, degassing, purification and evaporation, to avoid the occurrence of oxidation, carburization, decarburization and pollution metamorphism. Therefore, vacuum brazing has become an essential means of production in aviation, atomic energy, electrical instrument, petroleum, chemical industry, automobile and tool fields. High strength airborne computer chassis adopts integral welding technology, one of the key technologies is high vacuum brazing. In order to meet the requirements of new material welding process, high precision process equipment is needed to ensure.

Vacuum brazing technology is used in locomotive radiator, compressor intercooler, freon and alkene type refrigeration system, excavator oil cooler, gas turbine regenerator, high power transformer radiator, as well as domestic appliance applications, such as vacuum brazing of heat exchanger core of domestic air conditioner and various electric heaters.

The main working process of vacuum brazing:

First put the assembled workpiece into the vacuum chamber, start the mechanical vacuum pump, and when the system reaches a certain vacuum degree, connect the diffusion pump, pump the vacuum chamber to the required vacuum degree and then start heating up as required. The vacuum system should be pumped continuously throughout the heating process to maintain the required vacuum degree. The heating rate should not be too fast to avoid a sharp decrease in vacuum. After the completion of the heating process, cooling, when the temperature in the furnace drops to the temperature of the oven, complete the brazing of the parts.

Equipment selection: RHVB series vacuum brazing furnace produced by SIMUWU company is a high quality product for vacuum heat treatment process of tools and molds. Good temperature control precision and temperature control uniformity ensure the effective process of vacuum brazing. SIMUWU company focuses on vacuum furnace manufacturing, has more than 10 years of related experience, in the field of vacuum furnace manufacturing has a good reputation. The product line includes true air quenching furnace, vacuum oil quenching furnace, vacuum brazing furnace, etc., widely sold in developed and developing countries.