The Importance of Quality Control in the Manufacturing Process of Precision Ball
Quality control is critical in the manufacturing process of precision balls, especially those used in medical, electronic, and industrial applications. Read on to learn more about steps that should be considered best practices for precision ball manufacturing to ensure the utmost quality.
Steps in the Precision Ball Manufacturing Process
Raw materials are inspected.
Cold heading machine-cuts off the proper length of the wire material, then forms the cylindrical shape into a roughly spherical shape
Flashing-removes any excess material on the perimeter of the balls
Heat treatment-quench and temper process to decrease internal stresses
Then the balls are rapidly cooled in an oil reservoir to produce martensite for hardness
Grinding-before and after heat treatment, to bring the ball closer to its final requirements
Lapping two phenolic plates a very fine abrasive flurry, such as diamond dust, to further decrease surface roughness
Cleaning-removes any processing fluids and residual abrasive materials leftover from the manufacturing process
More rigorous cleaning techniques are employed for balls used in micro-electronics, medical, and food applications
Visual inspection-Every lot is inspected by hand to check for defects and dirt.
Roller gauging-balls are sorted by largest to smallest by the roller gauge. Oversized and undersized balls are eliminated.
Quality control-Each lot is tested for hardness, diameter, roundness, and surface roughness
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