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Large vacuum aluminum brazing furnace

Development of control system for large vacuum aluminum brazing furnace. The main functions of the control system are temperature control and logic control, which require a large number of control points and each controlled object is related to each other. The core of control system is programmable logic controller.

CX-Programmer method for controlling and setting the various protection functions of each mechanical system. PLC has the advantages of flexibility, convenience and easy maintenance. The final debugging results and the state of the vacuum furnace after putting into use show that the control system can not only achieve the control objectives, but also ensure the long-term trouble-free operation of the equipment.

Vacuum aluminum brazing is a method of forming solid bond by filling matrix metal gap with liquid filler metal whose melting point is lower than the base metal under vacuum heating condition. Capillary suction is used to fill the gap between matrix metals. From 1980s to 1990s, vacuum aluminum brazing technology and vacuum aluminum brazing equipment have developed greatly in China. The technical specification of small aluminum plate-fin heat exchanger and the technical requirement of aluminum brazing equipment are put forward. In the early 21st century, China has successfully developed large vacuum aluminum brazing furnace due to the manufacturing process of large aluminum plate-fin heat exchanger.

With the continuous improvement of industrial automation level and the rapid development of computer technology, the level of automation control is becoming higher and higher. However, as a control device, programmable logic control (PLC) can give full play to the functions of the computer, flexibility and versatility as well as the advantages of the relay system, such as simple, easy to operate, low cost and so on. Integrals are integrated and can be adapted to industrial environments. Therefore, the programmable controller (PLC) has obvious advantages as the control core in the electronic control system of vacuum aluminum brazing furnace. Programmable logic controller (PLC) has been used in most medium and small vacuum aluminum brazing furnaces. In the control system of large vacuum aluminum brazing furnace, there are many points to be controlled, which need to establish complex chain protection and further develop on the original basis. The economy and rationality of the electronic control system developed for the control core.

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