Mesh belt quenching furnace
1, Instructions for using quenching furnace
A, The installation position of the quenching oil tank should be determined according to the installation diagram before positioning the equipment. The quenching tank is installed in the pit, with the upper opening matching the horizontal plane. The pit should not leak water and should be reinforced according to the local soil conditions. The quenching tank should not be too close to the pit, and some gaps should be left for maintenance and upkeep.
B, The furnace body should be installed on a flat cement floor, and the mesh belt must be in a good horizontal position. The edge of the discharge groove at the back of the furnace should extend into the bottom of the quenching oil tank.
C, After the installation and positioning of the furnace, the electrical wiring can be installed according to the electrical diagram of the furnace. The electrical conduit can be laid in the preset groove, but the electrical wires and thermocouple wires must be separated. For threading, cooling water pipes and outlet pipes, it is best to use open water circuits.
D, After the installation of the furnace is completed, the transmission parts of the equipment should be opened and debugged one by one to observe whether the operation is correct. Attention should be paid to whether the motor wiring and motor transmission direction are in line, and whether the current and voltage speed controllers are in accordance with the design parameters. Connect the drip delivery pipeline and nitrogen pipeline, and check if there is any leakage in the pipeline.
E, After completing the above tasks, the furnace can proceed with baking.
1. Oven curve:
20-200 ℃ 18 hours 200-300 ℃ 12 hours
300-400 ℃ for 8 hours, 400-500 ℃ for 8 hours
500-600 ℃ for 8 hours 600-700 ℃ for 8 hours
700-800 ℃ for 6 hours 800-900 ℃ for 6 hours
2. Operation, use and precautions
A, Preparation before startup: Set the temperature controller to the desired temperature and turn on the power switch of the electrical cabinet.
B, Furnace heating, turn on the island electrical instrument to keep the temperature controller and monitoring in working condition.
C, Mesh belt drive: When the furnace temperature reaches 400 ℃, the mesh belt drive button should be turned on. Before turning on the mesh belt start button, the speed regulator and potentiometer should be turned to the minimum. After the motor starts, the adjuster and potentiometer should be turned to the desired speed.
D, Oil circulation: When using oil circulation, it should be used during discharge to ensure even oil temperature in the oil tank. Turn on the oil circulation button to activate the oil circulation pump.
E, Elevator: When discharging, turn on the elevator start button, start the motor, and then turn the speed regulator and potentiometer to the desired speed.
F, When the temperature inside the furnace rises to 700 ℃, a small amount of protective gas should be dripped into methanol to form a muffle protective atmosphere, which should be ignited at the furnace mouth. Before reaching the working temperature and officially feeding, the composition of the furnace gas should be adjusted to ensure that the atmosphere meets the requirements of the heat treatment technology, and the heating time should be recorded.
G, During insulation: Once the temperature reaches the working temperature, a small amount of workpiece can be quenched. At the beginning of quenching, the quenched workpiece should be inspected in a timely manner. If it does not meet the requirements, it should be adjusted in a timely manner. After determining that the quenched workpiece has passed the heat treatment technology requirements, it can be officially put into production. During operation, close attention should be paid to the furnace temperature, heating voltage and current, and the transmission of the mesh belt should be observed.
H, Shutdown: When shutting down, the heater and temperature controller should be stopped to stop heating the heater. Then, all speed controllers and potentiometers should be turned to the minimum, and the stop buttons for mesh belt transmission, mesh belt lifting, and oil circulation should be pressed to cut off the dripping liquid. Finally, turn off the key switch and cut off the main power supply.
3. Maintenance and upkeep of equipment
A, The furnace equipment should be kept clean regularly, the transmission mechanism should be checked regularly, and the oil level of the lubricating oil should be maintained to ensure that the mechanical transmission part of the furnace runs well.
B, Check the operation status of the mesh belt at any time. If any deviation is found, adjust the screws in a timely manner to prevent the mesh belt from being scratched and worn.
C, When adding materials, be careful not to load too many workpieces to prevent them from overflowing.
D, The furnace will be used for about 2 months, and decarbonization treatment should be carried out on the muffle and mesh belt to extend their service life.
