The well type tempering furnace not only has the common characteristics of the above industrial resistance furnace, but also changes the model parameters of the controlled object due to the physical size of the load. In order to facilitate the heat treatment of small workpieces, the tempering and furnace of resistance furnace in this paper can be divided into two parts from the middle, and equipped with removable intermediate furnace door. In the heat treatment of small workpieces, the movable intermediate furnace door is installed in the middle of tempering, and the latter half of furnace is used for heat treatment. In the heat treatment of large workpieces, the intermediate furnace door is removed, and the complete furnace is used for heat treatment Heat treatment.

Therefore, the well tempering furnace is abstracted as a controlled object with large lag, large inertia and nonlinearity.

Structural characteristics of well type tempering furnace and vacuum quenching furnace

(1) Temperature uniformity to achieve the temperature uniformity required by users is guaranteed by the design of circulating fan, air guide cover plate, furnace structure, distribution of electric heating power, arrangement of electric heating elements, control mode and process, furnace door structure, etc.

(2) the advanced nature of the advanced mechanical system of vacuum quenching furnace is guaranteed by design, component selection, quality and machining quality. The mechanical system runs smoothly and reliably, and the equipment is in the working state of low noise and low vibration.

(3) The perfect control system can realize accurate temperature control from 100 ℃ to 650 ℃, the system is stable and reliable, the operation is simple, the human error operation is avoided, and the function is complete.

(4) Quenching transfer time is fast, adjustable, the bottom of the vacuum quenching furnace is split door, double speed lifting mechanism, advanced mechanical system, which makes the quenching transfer fast and reliable, and the time can be adjusted according to the user's process requirements.