The characteristics and control requirements of copper well type annealing furnace

Well type annealing furnaces are widely used, mainly for annealing heat treatment of various metal materials. After annealing, the workpiece can be kept clean without oxidation or decarburization, and can be used for vacuum annealing with a vacuum pump to keep the processed product bright. Performing multiple furnaces, tanks, and processes simultaneously can improve efficiency, reduce consumption, and lower production costs.
The high cleanliness and brightness well type annealing furnace is specifically designed for annealing copper coil tubes and internally threaded tubes. The annealing tube adopts a specific internal blowing process, and protective gas is used in the furnace to ensure high cleanliness and brightness of the inner and outer surfaces of the tubes. Its characteristics include:
① Good airtightness, using oil resistant rubber sealing form.
② Annealing in a protective atmosphere, keeping the surface bright, using a vacuum pump to extract air from the furnace, and then filling it with nitrogen to achieve annealing in a protective gas.
③ Specific cleaning and treatment process, using high-purity nitrogen gas to blow can remove residual lubricating oil at any time and replenish fresh nitrogen gas.
④ Efficient and energy-saving, the furnace is equipped with a strong convection circulation fan, which enables rapid heat exchange inside the furnace and reduces heating and cooling time.
⑤ Intelligent control system.
Based on the above characteristics, as well as the on-site process situation of the factory and the detection and analysis of the annealing furnace temperature field in the early stage. The entire annealing furnace control system is required to meet the following performance indicators:
(1) The temperature control system of the well type annealing furnace requires good stability, and the annealing process is roughly the last step of the entire copper coil production, so it is necessary to ensure a stable production process.
(2) The system needs to have high security. Due to the numerous related parameters of the entire control system, it needs to be fully considered in the design process, with safety as the top priority. In addition, it also needs to have good control accuracy.
(3) The system needs to have a certain degree of adaptability and anti-interference ability. Due to the large amount of variability and random interference in dry industrial sites, the system must be able to make corresponding changes to cope with them. For example, the impact of loading amount on heating and the aging of equipment over time.
(4) Due to the hysteresis of temperature inside the well type annealing furnace, the output often cannot follow quickly when the input changes. Therefore, in order to achieve correct temperature control, the system must have good dynamic tracking performance.