Machining quality and manufacturing technology of piston rod

Piston rod is a relatively important part of hydraulic equipment. It has friction and load. It is necessary to ensure good processing quality. The structure of the piston rod is relatively simple, but the aspect ratio is very large. It belongs to slender shaft parts and has poor rigidity. In order to ensure machining accuracy, rough turning and fine turning must be separated during turning, and rough and fine turning are always used with tool holders. In order to reduce the deformation of the workpiece during processing, the center frame is used when processing the threads at both ends.

When grinding the outer surface, the workpiece is prone to deform the knife and elastically, which affects the accuracy of the piston rod. Therefore, the center hole should be repaired during processing, and the center hole should be clean. The tightness between the center hole and the tip should be appropriate, and good lubrication should be guaranteed. The general choice of grinding wheel: abrasive white corundum, grain size 60 #, medium soft or medium, ceramic bonding agent. In addition, the width of the grinding wheel should be narrower to reduce the radial grinding force. Pay attention to the choice of grinding amount during processing, especially grinding. The depth should be small.

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