Grinding
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Transcript of Grinding
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• Grinding is a process which utilizes the use of abrasive particles bounded together to produce superior surface finishing
• An abrasive: is a small, nonmetallic hard particle having sharp edges and an irregular shape
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Types of Abrasives• Conventional
– Aluminum oxide– Silicon carbide
• Super abrasives– Cubic boron nitride– diamond
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Grinder Forms cont’d
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Grinder Wheels
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Grinding Wheels• Operations done to preserve the
properties of the wheel– Dressing– Truing– shaping
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Dressing
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Grinding Operations• Examples of grinding operations
– Surface grinding– Cylindrical grinding– Internal grinding
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Grinding Machines
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Grinding Machines
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Grinding Machines
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Surface Finishing• Any of different processes employed for
surface, edge, and corner preparation, as well as cleaning, and coating.
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Lapping• Finishing operation in which a loose, fine-
grain abrasive in a liquid medium abrades material.
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Lapping cont’d
• Lapping is an extremely accurate process• It corrects minor shape imperfections.• Refines surface finishes • Provides a close fit between mating
surfaces. • Dimensional Tolerances = 0.00005mm
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Polishing• An operation to smooth off roughness from
a work-piece, or put a high finish on metal by using a polishing wheel.
• Polishing wheel is a wheel made of one of several kinds of materials and coated with abrasive grain and glue.
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Polishing cont’d
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Questions