Technology and tooling of CNC turning
Technology and tooling of CNC turning
The processing technology of CNC lathes is similar to that of ordinary lathes, but since CNC lathes are clamped once, all automatic turning processes are completed automatically, so the following aspects should be noted.
1. Reasonable choice of cutting amount
For high-efficiency metal cutting, the material to be processed, cutting tools, and cutting conditions are the three major elements. These determine the processing time, tool life and processing quality. The cost-effective processing method must be a reasonable choice of cutting conditions.
Three elements of cutting conditions: cutting speed, feed rate and cutting depth directly cause tool damage. As the cutting speed increases, the tool tip temperature will rise, and mechanical, chemical, and thermal wear will occur. Cutting speed increased by 20%, tool life will be reduced by 1/2.
The relationship between the feed conditions and the wear on the back of the tool occurs within a very small range. However, the feed rate is large, the cutting temperature rises, and the rear wear is large. It has less influence on the tool than the cutting speed. Although the depth of cut has no effect on the cutting tool and the feed rate is large, when cutting at a small depth of cut, the hardened layer of the material being cut will also affect the life of the tool.
The user should select the cutting speed to be used according to the processed material, hardness, cutting status, material type, feed amount, cutting depth, etc.
The selection of the most suitable processing conditions is selected on the basis of these factors. Regular and stable wear and tear to reach the life is the ideal condition.
However, in actual operations, the choice of tool life is related to tool wear, dimensional changes to be processed, surface quality, cutting noise, processing heat, etc. When determining the processing con