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1、 Ring making
requirement:
1. The ring size is consistent
2. Ensure the roundness of the ring
3. Maintain the machine regularly
2、 Making small pieces
requirement:
1. Assemble raw materials of corresponding varieties according to production requirements
2. Ensure that the ring and main section are consistent
3. The punched estuary is flat to ensure that the roundness of the circle meets the standard
3、 Welding small parts
requirement:
1. The welded junction is firmly welded
2. The welding package is full and even
3. No welding slag and big burr (tire scratch)
4. Maintain the butt welding machine regularly to ensure that the top break and flash are sufficient
4、 Chain assembly
requirement:
1. Make sure the model is correct
2. The welding package is full and even
3. No welding slag and big burr (tire scratch)
4. Maintain the butt welding machine regularly to ensure that the top break and flash are sufficient
5、 Heat treatment
requirement:
1. Ensure sufficient heating time and proper temperature
2. Strictly implement the temperature control process, raise the temperature and keep the temperature in place
3. The proportioning concentration of heat treatment solution shall be checked in each furnace to control the water temperature
4. Strictly control the tempering time and temperature
6、 Hardness test
requirement:
1. Each heat treatment shall ensure that the hardness of small samples in the furnace reaches the standard
2. Unqualified chains shall be heat treated again
3. Keep records of heat treatment process
4. Hardness test record
7、 Polishing and tension measurement
requirement:
1. Each chain must be polished
2. The polishing time of each barrel shall not be less than one and a half hours
3. The welded junction of the polished product must be smooth without burrs
4. Pull test one by one
5. The tensile force is more than 8 tons, and the ring welded junction is free of fracture and deformation
6. In case of open welding and deformation, cut off immediately and repair in time
8、 Finished goods warehousing
requirement:
1. Bind firmly (complete assembly and chain accessories)
2. No slackness in repeated hoisting
3. Even dipping of water paint
4. The water paint shall be dry
5. The tag is correct and the color is well differentiated
6. The inventory models are classified and stacked without error