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Automatic CNC lathe
Choose the cutting amount reasonably
For efficient metal cutting processing, the processed materials, cutting tools and cutting conditions are the three elements. These determine the processing time, tool life and quality. The economical and effective machining method must be a reasonable choice of cutting conditions. Three elements of cutting condition: cutting speed, feed quantity and cutting depth directly cause damage to the tool. As the cutting speed increases, the temperature of the tool tip will increase, which will lead to mechanical, chemical and thermal wear. Cutting speed increases by 20%, cutting tool life decreases by 1/2.
The relationship between the feed condition and the wear behind the tool is produced in a very small range. But the quantity of feed is large, the cutting temperature rises, the wear behind is big. It has less effect on cutting tool than cutting speed. Although the cutting depth has no great influence on the cutting speed and the quantity of feed, when the cutting depth is small, the hardened layer of the cutting material will also affect the tool life. The user shall select the cutting speed according to the material, hardness, cutting condition, material type, feed quantity, cutting depth and so on. The most suitable processing conditions are selected on the basis of these factors. Regular and stable wear to reach the life is the ideal condition. However, in practice, the choice of tool life is related to tool wear, machining dimension change, surface quality, cutting noise, machining heat and so on. When determining the processing conditions, it is necessary to study according to the actual situation. For difficult materials such as stainless steel and heat resistant alloys, coolant or rigid blade can be used.
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