The acute angle of splayed oil groove in CNC lathe is too large.

The following methods can be adopted:

1. Adjust tool parameters: according to the actual machining situation, adjust the shape, size and cutting parameters of the tool to meet the requirements of sharp corner transition.

2. Choosing the right cutting fluid: In the process of machining, choosing the right cutting fluid can reduce the cutting force and improve the machining accuracy and surface quality.

3. Control the cutting speed: reasonably control the cutting speed, so as not to increase the tool wear too fast and affect the processing quality.