Steel Balls Production:
Steel balls are widely used in precision bearings, and we can say that the operation of bearings is inseparable from steel balls. The load and life of steel balls will directly affect the efficiency of bearingd, and its production process and installation will directly affect the quality of steel balls.
Detailed Process:
1. Raw Material Processing
Inspect material of each specification. If it is a wire, we also need to do wire drawing with a wire drawing machine to the diameter accoring to the requirement.
2. Cold Heading
Under normal temperature conditions, the raw material is plastically deformed to form a ball blank.
3. Flashing
Remove the annulus on the surface of ball blanks, and at the same time improve the roughness of the surface of the steel balls, so that ball blanks are initially spherical.
4. Heat Treatment
Put balls into the heat treatment furnace for carburizing, quenching and then tempering, so that balls have certain carburized layer and hardness, toughness and crushing load.
5. Peening
Use a strengthening machine to make the steel balls collide with each other, so that the surface of the steel ball is plastically deformed and strengthened. As a result, the compressive stress and hardness of steel balls surface can be improved.
6. Grinding
Fix the iron plates and rotate the grinding wheel plates to grind the steel balls, so as to further improve the surface shape of the steel balls.
7. First Lapping
Use two cast iron primary grinding discs, add abrasives, and improve the fineness of the steel ball surface by mechanical movement.
8. Selection
Select steel balls with various defects, such as surface defects, shallow surface layer cracks, and internal material defects via below mothods,
such as human selection, photoelectric, eddy current, vibration, etc.
9. Second Lapping
Fix the iron plates and rotate the grinding wheel plates to grind the steel balls, so as to further improve the surface shape of the steel balls.
10. Washing
Cleaning the steel balls to ensure the cleanliness of the steel balls.
11. Final Check
Inspect each batch steel balls according to processing requirements, such as the roundness, hardness, metallographic, stress, etc.
12. Apply Anti-rust Oil and Pack
Use anti-rust oil to spray steel balls to prevent rust, and them according to customer’s packaging requirements finally.
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