When the appearance of metal cutting processing workpiece, the appearance roughness is mainly due to the effects and influence of several elements, physical factor and CNC processing process elements.

Several elements: The shapes and a few viewpoints are considered from a few viewpoints, especially the tip tip arc radius, the main biased angle, the sub -corner angle, and the amount of feed in the cutting of the appearance.

Physical element: The physical essence of the cutting process considers the corner of the blade mouth and the squeezing and conflict behind the cutting process. When the plastic material of the CNC lathe forms a dandruff, it is easy to form a high -hardness with high hardness on the front knife surface. It can cut the front knife surface and cutting blade to cut, so that a few viewpoints and the amount of knife are changed. The outline of the chip tumor is very irregular, so it makes the workpiece appear on the surface of the workpiece that is constantly changing. Some dandruff tumors are embedded in the appearance of the workpiece, which increases the appearance roughness. The oscillation of cutting during cutting increases the output roughness parameter value.

Process elements: From the perspective of the process, the impact of its impact on the roughness of the machining appearance of the hardware parts mainly includes the elements related to the cutting knife, the elements related to the workpiece material, and the elements of the CNC processing conditions.