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Through the method of experiment, the cutting force data of various influencing factors are measured, and the expression reflecting the relationship between various factors and cutting force is obtained by processing, which is called the empirical formula of cutting force calculation
In practice, there are two empirical formulas of cutting force: one is exponential formula, the other is unit cutting force. Exponential formula: FC = KC & # 8226; ap• f=kc• hd• bd kc=Fc/A d=Fc/(a p• f)=F c/(b d• h d)FP -- back force (n) P>
Ff -- awesome force (N). p>
extended data:
compared with ordinary machine tools, CNC machine tools have the following characteristics: high machining accuracy and stable machining quality; high precision and stable machining quality; It can carry out multi coordinate linkage, and can process complex parts; When the machining parts are changed, generally only the NC program needs to be changed, which can save the proction preparation time
the machine tool itself has high precision and rigidity, and can choose favorable processing amount, with high proctivity (generally 3 ~ 5 times of that of ordinary machine tool); High degree of automation of machine tools can rece labor intensity; The quality of operators is required to be higher, and the technical requirements of maintenance personnel are higher
let's first talk about the calculation method of "item": the difference between the number of items on both sides, such as 180.5 items on the black side and 180.5 items on the white side, is that the white side wins 7.5 items, because the black side has to post 7.5 items first
let's talk about the calculation method of "sub": half of the intersection point is 180.5 + 3 + 3 / 4 (half of 7.5 mesh). If one party wins by more than this number, the number of sub winning is the difference between the number of sub winning party and 180.5 + 3 + 3 / 4, which is the same as the above example, that is, white party wins 3 + 3 / 4.