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Analysis of machining error of CNC machine tools and its causes

In order to improve the machining accuracy of CNC machine tools, technicians must conduct a detailed analysis of the errors generated in the NC machining process to find out the causes of machining errors and take timely measures to reduce production losses. The following finishing CNC lathes and high-precision CNC machine tools will appear processing error and reasons:

Analysis of machining error of CNC machine tools and its causes

First, CNC machine tools

1, CNC machine error caused by its own processing error: control system error; machine tool feed system error

2, manufacturing process caused by the processing error: the processing technology unreasonable; cut into the cut point selection inappropriate

3, the workpiece positioning error

4, the error caused by unreasonable programming

Second, high-precision CNC machine tools

1, high-precision CNC lathe out of the outer cone was: before and after the top of the connection is not coaxial with the spindle axis, CNC lathe tailstock center position is not caused.

2, CNC machine tool vibration when the workpiece is generated: the tailstock sleeve may be extended too long or the workpiece is too loose, it may be less sharp or tool tip arc is too large, or rotating the top of the bearing clearance Or, small skateboard gap is too large.

3, the round beat can not meet the requirements: the top of the spindle axis is not coaxial with the axis or the top of the bearing wear and tear caused by the round beating, the workpiece center hole is not clean clean or center hole touch hair, The end face of the disk does not function as a center hole

4, high-precision CNC lathe center hole serious wear or bite hair: May be the use of fixed top without lubricating oil or spindle speed is too high, or the center of the chuck is not clamping, turning the workpiece has stopped rotating caused.

The use of CNC machine tool parts generated when the source of the error is very complicated, only a reasonable grasp of the principle of CNC machine tools, and strengthen the operator's knowledge of the process can be a good solution to the machining error of CNC machine tools to improve CNC machining accuracy to produce qualified product.

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