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Problems needing attention in precision machining
Jul 09, 2018
  • In order to ensure the machining accuracy, rough and finish machining separately from the best.Because when rough machining, cutting quantity is big, the workpiece by cutting force, clamping force, heat, and the machining surface has the obvious work hardening phenomenon, there are large internal stress artifacts interior, if rough, rough machining, row after finishing the parts precision will soon lost because of the stress redistribution.For some high machining accuracy requirements of parts.Before after rough machining and precision machining, also should be arranged or aging treatment of low temperature annealing process to eliminate internal stress.

  • Reasonably choose equipment.Roughing cut off most of the machining allowance, does not require high machining accuracy, so rough machining should be bigger in the power and the high accuracy of machine tools, finishing process demands with relatively high precision machine tool processing.Rough and finish machining on the machine in different, can give full play to the equipment capacity, and can prolong the service life of precision machine tools.

  • In the machining process, often are scheduled for heat treatment process.Location arrangement is as follows: heat treatment process to improve the machinability of metals, such as annealing, normalizing, tempering, general arrangement before machining.To eliminate internal stress, such as aging treatment, conditioning treatment, such as general arrangement, after rough machining, but before finishing.In order to improve the mechanical properties of the parts, such as carburizing, quenching and tempering, general arrangement into the line after machining.Such as heat treatment after large deformation, but also should arrange the final machining process.

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