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Reasonable the measure that reduces grinding to machine blemish
From;    Author:Stand originally
1, dosage of logical choice grinding, use radial feed lesser essence grinds a method careful even grinding. If reduce radial feed and emery wheel rate appropriately, increase axial feed, make emery wheel and workpiece contact area decrease, medicinal powder hot condition gets ameliorative, control surface layer temperature effectively to rise thereby.
2, logical choice and nap emery wheel, it is better to use white corundum emery wheel, its performance is strong and fragile, and blade of easy generation new cutting, cutting force is accordingly small, grinding heat is lesser, medium size is used on granuality, if 60 a list of things of 46 ~ are better, go up in emery wheel hardness the kind in using is soft (Zr1, Zr2 and R1, R2) , namely emery wheel of thick granuality, low hardness, from encourage the gender can reduce heat in metal cutting very much.
It is very important that when essence of life is ground, proper emery wheel chooses, be aimed at state of tall molybdenum of tall vanadium of mould rolled steel, choose emery wheel of corundum of Gd single crystal to suit quite, should machine hard alloy, quench when hardness expensive stuff, preferential use emery wheel of organic binder diamond, it is good that organic binder emery wheel grinds a gender oneself, grind a workpiece surface roughness to be able to amount to Ra0.2 μ M, in recent years, as new material application, cbn(cubic nitrogen changes boron) emery wheel shows result of very good treatment, shape in numerical control the finish machining on the cylindrical grinder inside grinder, coordinate grinder, Cnc, (The article originates net of navigation of 66 machine tools: Emery wheel of sort of other of Www.66jcw.cn) effect excel. In grinding treatment, want to notice seasonable nap emery wheel, hold emery wheel keen, after emery wheel passivation, can slip in workpiece surface brush, extruding, cause workpiece surface burn, intensity is reduced.
3, lubricating fluid of reasonable use refrigeration, play is cooling, catharsis, lubricant 3 big effect, maintain cooling and lubricant cleanness, control grinding heat to be inside limit thereby, be out of shape in order to prevent workpiece heat. Improve condition of the refrigeration when grinding, if use oiled emery wheel or inside the measure such as cooling emery wheel. Introduce cutting juice emery wheel center, cutting fluid can enter grinding area directly, produce significant cooling effect, prevent workpiece surface burn.
4, will quench stress drops lowermost limit after heat treatment, because quench organization of stress, meshy carbonization is below grinding strength effect, constituent generation becomes extremely easy to make workpiece produces crackle. To high accuracy mould to eliminate grinding remains stress, microtherm ageing treatment should have after grinding in order to raise tenacity.
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