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The importance of cutting quantity selection in CNC lathe machining

2019-12-16

For high efficiency CNC lathe machining metal cutting, the processed materials, cutting tools, cutting conditions are three major elements. These determine machining time, tool life machining quality. The economic effective machining method must be reasonable choice of cutting conditions.

The three factors of cutting conditions in CNC lathe machining: cutting speed, feed rate cutting depth directly cause tool damage. With the increase of cutting speed, the temperature of tool tip will rise, which will produce mechanical, chemical thermal wear. If the cutting speed is increased by 20%, the tool life will be reduced by 1 / 2.

The relationship between the feed condition the wear behind the tool is very small. But the feed rate is large, the cutting temperature rises, the rear wear is large. It has less influence on the cutting tool than the cutting speed. Although the influence of cutting depth on the tool is as high as the cutting speed feed rate, the hardened layer of the material to be cut will also affect the life of the tool when the cutting depth is small.

The user should choose the cutting speed according to the material to be processed, hardness, cutting state, material type, feed rate, cutting depth, etc.

The most suitable processing conditions are selected on the basis of these factors. Regular stable wear is the ideal condition to reach the service life.

However, in practical operation, the choice of tool life is related to tool wear, change of machined dimension, surface quality, cutting noise, machining heat, etc. In determining the processing conditions, it is necessary to study according to the actual situation. For hard to machine materials such as stainless steel heat-resistant alloy, coolant rigid blade can be used.


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