Machinery industry vacuum heat treatment furnace

Vacuum performance, in order to ensure that the vacuum furnace in vacuum heat treatment furnace structure design must follow a basic principle, is the furnace should use airtight weld, known to the calendar, vacuum heat treatment of metal parts are conducted in airtight vacuum furnace, thus, gain and maintain the gas leakage rate was due to the stove, ensure vacuum degree of vacuum furnace, and to ensure the quality of the parts of the vacuum heat treatment has very important significance. So a key problem of vacuum heat treatment furnace is to have a reliable vacuum seal structure. At the same time, as far as possible without opening or opening the furnace, use or avoid the dynamic sealing structure to minimize the vacuum leakage. The parts and accessories such as water cooled electrodes and thermocouple export devices installed in the vacuum furnace must also design the sealing structure.

Vacuum heat treatment furnace  shell, furnace cover, electric thermal component conductance disposal (water cooling electrode), water cooling device, middle vacuum insulation, etc., all in the vacuum, heating condition work. In this extremely unfavorable condition work, must ensure the structure of each component is not deformed, do not damage, vacuum sealing ring is not too hot, do not burn. Therefore, the components should be equipped with water cooling devices according to different situations to ensure that the vacuum heat treatment furnace can operate normally and have sufficient service life.

With low voltage large current: in vacuum container, really a lxlo degrees with a few empty – 1 when the scope, serious can produce arc discharge, the vacuum container under high voltage electric conductor, glow discharge is produced. Therefore, the working voltage of the vacuum heat treatment furnace is generally not more than 80 100 volts. In the electric heating element structure design at the same time to take effective measures, such as to avoid a sophisticated components, the spacing between the electrode cannot be too narrow, preventing the occurrence of glow discharge and arc discharge. In vacuum heat treatment furnace, burning electric heating elements, insulation layer, etc., causing major accidents and losses.