The tip of the tip of the tip of the tip of the car in the outer circle of 90 degrees is higher than that of the material center
It depends on how old you are, about one percent of the diameter, and it's not easy to get a knife
This is based on the actual situation: A. Machine clip - there are eight blade (four 90 - degree blade, four 75 - degree blade), multi degree of freedom cutting, especially used in car plane should point at the center of the high was on the material center (the same as the top), to prevent the transverse convex platform, its breaking point; (summary, as long as it is a flat face over machine tool center, what kind of car knife has to be at the center)
The following situation is the situation of uneven face to center Large machine tools (lathe turning diameter greater than 2 m), with 90 degrees outside circle cutter, generally center high no strict requirement, if point higher than the center, so the tip wear is quite fast, especially the front, given the large lathe feeding time longer, easy after a blunt knife knife, and the point is not easy to collapse, can consider to high point slightly higher than the center; About 1-2mm; Small lathe (generally common 65.64.63.62 etc) point proposal is to center, gao will cut ceng live easy vibration knife, the blade, the advantages of high surface finish; The tip of the knife is low, the tip of the blade is strong, and it is easy to break the tip of the blade. If the outside circle is too small, it may collapse directly.
To sum up: Normal circumstances of getting out of the car, not suggesting that the tip is high or low, the center is best. Special case, need sharp, blunt wear-resisting, can slightly taller or lower 1:0.5-1mm can; If it is nc machining, the best point to reset, or processing size will vary with the size of the cylindrical without rules (point is not in the center, cutting position small changes will happen), cannot guarantee the machining precision;
