Sunday, May 28, 2023
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Managing Grinding Forces and Abrasive Sharpness

In a grinding wheel, every abrasive grain acts as a cutting tool. The wheel applies force and the workpiece applies resistance. These resistance forces either fracture the abrasive grains or force them to release when dull. If dull grains aren’t released, plowing can occur. This is a localized deformation that can be harmful or, if planned, beneficial. Plowing will eventually lead to sliding, which is when the abrasive cannot penetrate the material. Like plowing, sliding can lead to a finer surface finish, but also causes damage. To maintain the sharpness of a grinning wheel, use the correct abrasive, bond type, and grade hardness. Also pay attention to the dressing and the coolant system, and don’t push the wheel too hard.

Key Takeaways:

  • If dull grains don’t fracture or release, they will plow or slide rather than remove material.
  • While plowing can cause problems, it can also provide a finer surface finish when properly controlled.
  • Plowing can lead to sliding, which leads to the formation of swarf.

“Sharp grinding wheel grains are essential for removing material from a workpiece.”

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