1. Workpieces with corrosive, volatile and explosive gases are strictly forbidden to enter the furnace body for processing, so as to avoid affecting the service life of heating elements and refractories and causing accidents such as explosion.

 

 2. The workpiece with too much oxide skin shall be removed before entering the furnace, and it can be brushed with steel wire.

 

 3. Trolley type resistance furnace shall not operate over temperature, otherwise the service life of the equipment will be shortened.

 

 4. Rough operation is strictly prohibited, and workpieces shall be handled with care to avoid impact.

 

 5. The workpieces shall be stacked evenly, about 100-150 mm away from the heating elements.

 

 6. When loading and unloading workpieces, trolley type resistance furnace must cut off the power supply of heating elements to ensure the safety of operators.

 

 7. When the trolley type resistance furnace is used, the operator shall not leave the post without permission, and must pay attention to whether the working condition of the furnace is normal at any time.

 

 8. If the resistance wire is used, it shall not be bent to avoid fracture.

 

 9. The oxide of furnace (including under the electric furnace wire) shall be cleaned frequently, at least once a week or once every five furnaces. Compressed air can be used to blow under the furnace bottom plate.

 

 10. Operators must understand the following points before maintenance:

 

 

 

A. layout of power distribution system and control system and location of safety devices, etc.

 

 

 

B. structure and performance of trolley type resistance furnace and its auxiliary equipment.

 

 

 

C. operation process and safety operation procedures.

 

 

 

11. Preparation inspection:

 

 

 

A. check whether the contact at the wiring of grounding device is good.

 

 

 

B. check whether the power supply of the equipment is normal and whether there is phase break, short circuit or bare wire.

 

 

 

C. check whether the temperature control system is abnormal.

 

 

 

D. check whether the heating element is damaged, whether the connection is in good contact, and whether it is in contact with the furnace body and shell.

 

 

 

E. check whether the furnace door lifting and trolley in and out operation are normal.

 

 

 

12. Precautions:

 

 

 

A. add lubricating oil at the transmission shaft sleeve frequently to prevent damage to the shaft sleeve due to lack of oil.

 

 

 

B. the motor of trolley type resistance furnace shall be inspected regularly, and lubricating oil shall be added. Pay attention to the use safety.

 

 

 

C. regularly check the use of instruments and thermocouples to prevent incorrect temperature measurement due to the error of instruments and thermocouples.

 

 

 

D. regularly check the use of heating elements.