Grinding balls inspection
Forged grinding balls are widely used in Gold mining or Copper mining
which will follow the strict quality control system
1.Raw material of steel balls Pre-production checks
Steel Bars ( Diameter, Length of Cut Bars , Heating number signature )
Equipment includes Air Hammer , Forging Hammer, Cooling time and Quenching time and etc.
Temperature control- Quenching Start temperature and quenching end temperature ( Produce 10 grinding balls
then stop production and test the samples )
2. Grinding balls Surface Hardness Measurement
Balls 1-----Balls 10 HRC recordings
Surface hardness Target
3. Grinding balls Core Hardness Test . Cutting 2 balls for further inspection
4. Heating treatment before Packing ( Record heating batch , temperature )
5. Final Hardness Test before dispatch , Marking the hardness result on the steel drum of grinding balls
The customer inspected and verified the raw materials and finished products, and was satisfied with the quality. Therefore, an additional order was placed on-site.
