How to improve the machining precision of CNC lathes and produce more precise parts has always been the focus of research and research. According to the influencing factors of CNC lathe machining precision, several precisions, error compensation methods and error avoidance methods can be adopted. Control and improve machining accuracy.

1) Several precisions of progressive guide rail: The development trend of CNC lathe is high cutting speed and high machining precision. Higher cutting speed must cause oscillation. Therefore, the guide rail has better precision stability and higher rigidity. Steel can be used. The method of making all the grinding of the sliding track is progressing. The specific method is as follows: the steel-type sliding guide of the core-type CNC lathe is selected during the planning, and the steel sliding guide rail is fixed on the plane after grinding by the guide rail grinding machine, and the gap between the guide rail and the base of the guide rail is filled with the injection filler. Sufficient, and finally the whole grinding, to achieve a good precision.

2) Error compensation method: The error compensation method is a method of compensating the existing coordinate axis error by the compensation function of the numerical control system. The lathe with low precision can process higher precision products by error compensation method. This method can be done by hardware or software. For example, a numerically controlled lathe with a semi-closed-loop servo system has errors in positioning accuracy due to the influence of the reverse error, and the method of correcting the reverse error can be used to eliminate the error.

3) Error avoidance method: The error avoidance method is to eliminate possible errors by improving the precision of mechanical parts in the planning and manufacturing stage of CNC machine tools. This method can better reduce the error of the processing precision from the whole, but the cost is high, and the numerical control lathe is continuously difficult to improve the machining precision on the original basis.

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