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Sintering Technology of Vacuum Sintering Furnace

As there are many heating methods in vacuum sintering furnace, more and more people use vacuum sintering furnace to heat. For the heating of vacuum sintering furnace, the most important thing is temperature control. The control object of intelligent temperature control system is vacuum sintering furnace, which is composed of three sintering furnace bodies A, B and C and one heating furnace body.


When working, the heating furnace body is sleeved on the outside of a sintering furnace, and electric heating is used to realize the temperature control required by the vacuum sintering furnace process. Because of the different quantity of materials loaded in each sintering furnace and the different structure of each vacuum sintering furnace, different control parameters are needed to control the process temperature of the sintering furnace. In addition, after a sintering furnace completes the sintering process operation, it is necessary to automatically transfer to other workstations for the sintering process. In order to realize the automatic control of the sintering process, the intelligent temperature control system needs to detect the temperature parameters, process operation parameters and state of the heating furnace body and vacuum sintering furnace at A, B and C workstations, and ensure the control output of the process temperature control requirements for each workstation. There are mainly the following items:


(1) Detection parameters: temperature values at three temperature detection points of heating furnace body and sintering furnace at each working station, pressure values in sintering furnace, vacuum values in furnace, etc.
(2) Detection status: overtemperature alarm, overpressure alarm and water shortage alarm of heating furnace body and three-station sintering furnace;
(3) Temperature control output: the conduction control quantity of the electric heating wire at three temperature control points in the heating furnace body;
Control output: front, back, left and right movement of heating furnace body, manual and automatic state switching, etc.
The temperature of each furnace body is sampled by thermocouple, the temperature of the furnace body detected is compared with the temperature value required by the process, and the deviation is calculated. The PLC calculates the deviation according to a certain rule to control the number of zero-crossing trigger pulses of SCR in the control cycle, that is, to control the average power of the furnace body to achieve the purpose of temperature control.


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