2013年10月30日星期三

the grinding quality materials requirements

Cylindrical grinding, the correct choice of the grinding wheel is to ensure workpiece quality, increase productivity, reduce costs the important part. Select wheel features (abrasive, grain size, hardness, combined etc.), you must make a good abrasive grinding performance; grinding wheel with  concrete diamond blades suitable self-sharpening; generated when grinding wheel grinding force, grinding heat is relatively small; make easy dulled abrasive grinding wheel, have a higher life expectancy; reach workpiece machining accuracy and surface quality requirements, the machined surface is not easy to produce burns and cracks, grinding wheel, the workpiece and the grinding quality materials requirements are two key factors that can not be ignored.Width of grinding wheel speed is too high workpieces, grinding is easy to  granite polishing pad produce self-excited vibration, the surface roughness increases wheel life low; workpiece speed is too low, so that the surface is easy to burn. Generally the wheel speed and workpiece speed ratio between 120-200. Smaller diameter of the workpiece should be whichever is greater.Two radial feed speed selectionRadial feed speed is mainly affected by process system rigidity, workpiece shape accuracy limitations, when the process system less rigid, high precision shape of the workpiece, the radial feed speed should choose a small value, or deformation of the workpiece, which is difficult to ensure accuracy. Generally within the scope of the 0.5-0.7mm/min selection.

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