2013年9月18日星期三

Processing method of Gear Transmission

   1.Gear grinding: IT6 ~ IT4 → IT3, Ra:0.8 ~ 0.2 μ m principle: the shaping and generating
    The method of forming grinding of IT6 ~ IT5, Ra:0.8 ~ 0.4 μ m, by grinding, student High yield, low machining accuracy, less application.
   The method of generating gear grinding
   Tooth grinding: grinding wheel section tooth profile tooth imaginary rack, workpiece scroll right, the right side of the right side of the grinding wheel first teeth, from the root to the top of the workpiece grinding; then scroll left, the left side of the left side of the grinding wheel to the L slot, but also from the root to the top end mill, when two the side section l cogging all grinding, grinding wheel automatic retreat away from the workpiece, the workpiece indexing rotation, and then the right rolling, grinding second slot, so repeatedly, until the entire tooth grinding.
  2.Gear grinding:
IT7 ~ IT6, Ra:1.6 ~ 0.2 μ M equipment: lapping machine. Research: cast iron gear precision. Abrasives Abrasive:: 220# ~ 240#, active lubricating oil characteristics: same as the honing, can reduce the surface roughness, cannot improve the tooth profile accuracy
Spur Gears
Spur Gears

Axis parallel grinding method:
   (1).Process: the axis of grinding wheel and grinded gear meshing motion parallel, free grinding. Gear drives the grinding rotation without backlash, grinded gear also axial reciprocating motion, grinding wheel is slight brake. After a period of time, the grinding wheel and grinding rotation and reverse rotation, the two sides that are uniformly grinding teeth.
  (2).Features: the tooth surface sliding speed is not uniform, grinding is not uniform, the sliding speed gear top and root part of the large, grinding of large amount.
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