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ME364_cutting_finish

ME364_cutting_finish - Valery Marinov Manufacturing...

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Surface Finish 83 Valery Marinov, Manufacturing Technology Introduction The machining processes generate a wide variety of surface textures. Surface texture consists of the repetitive and/or random deviations from the ideal smooth surface. These deviations are v roughness : small, finely spaced surface irregularities (micro irregularities) v waviness : surface irregularities of grater spacing (macro irregularities) v lay : predominant direction of surface texture 5.7 SURFACE FINISH Roughness control Factors, influencing surface roughness in machining are v tool geometry (major cutting edge angle and tool corner radius), v cutting conditions (cutting velocity and feed), and v work material properties (hardness). Waviness spacing Lay direction Waviness heigth Roughness height Roughness width Elements of the machined surface texture Three main factors make the surface roughness the most important of these parameters: Fatigue life : the service life of a component under cyclic stress (fatigue life) is much shorter if the surface roughness is high Bearing properties :
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