vacuum brazing soldering furnace

Vacuum brazing soldering furnace is a large-scale heat treatment equipment, which can carry out vacuum brazing, vacuum annealing, vacuum aging and other processing. Several different programs can be programmed, and hundreds of heat treatment curve points can be controlled and programmed. Temperature control can be divided into six zones: upper, lower, left and right zones, front and rear zones. There are multi-point and single-point temperature recorders and over-temperature protection devices. The furnace temperature uniformity can be controlled within a constant temperature range. In addition, a high purity nitrogen and high flow rate strong cooling device is equipped. The equipment has the advantages of large furnace loading capacity, high efficiency, and no need for supplementary processing products for complex parts and parts with special requirements.

Vacuum brazing soldering furnace use:
It is mainly used for vacuum brazing of aluminum products such as aluminium alloy heat exchanger, brazing of stainless steel, titanium alloy, cemented carbide, superalloy, non-ferrous metal, vacuum tempering of high speed steel, tool and die steel, bearing steel, stainless steel, ageing and annealing treatment of non-ferrous metal, heat exchanger of stainless steel, oil cooler, non-ferrous steel, etc. Vacuum brazing of stainless steel thermos cup.

Vacuum brazing soldering furnace characteristic:
1. the partition heater arrangement is adopted to make the temperature uniformity in the heating zone consistent.
2. the brazing of the vacuum atmosphere can keep the workpiece clean and bright.

Vacuum brazing soldering furnace composition:
The equipment vacuum system is mainly composed of vacuum chamber, pump system, control valves and heat exchangers. The pump system is composed of mechanical pump, maintenance pump, roots pump and diffusion pump. The valve consists of front valve (disc valve), bypass valve (disc valve), maintenance pump valve (disc valve) and high valve (plate valve). Each valve is pneumatic valve, controlled by PLC pneumatic valve.

The heating chamber is mainly composed of stainless steel heating chamber shell, stainless steel reflecting screen, heater, ceramic insulator, water-cooled electrode, furnace bed, etc.

Vacuum brazing soldering furnace principle:
When the vacuum system works, the first step is to start the mechanical pump, maintain the pump and diffusion pump (heating), simultaneously open the front valve and maintain the pump valve to vacuum the diffusion pump. When the vacuum degree reaches a certain set value of the system, the Roots pump starts, and the bypass valve opens, and the front valve closes. At this time, the vacuum chamber is pumped down. When the diffusion pump is heated to a specified temperature and the vacuum degree is higher than the specified value, the high valve opens, the bypass valve closes, and the front valve opens. At this time, the vacuum chamber is pumped high vacuum, after the vacuum degree meets the technical requirements, the heat treatment can be carried out. After the hot working process is completed, the vacuum chamber filled with high purity nitrogen is forced to cool by heat exchanger, and the whole process is completed.