切削用量三要素（Three elements of cutting consumption）.docVIP

切削用量三要素（Three elements of cutting consumption） Cutting amount of cutting amount three elements Cutting amount refers to the total name of the cutting speed v c, the feed quantity f (or feed speed v f) and the back feeding knife amount a p, also known as the cutting amount of three elements. It is the process parameters that adjust the relative motion speed and relative position between the tool and the workpiece. Their definitions are as follows: (1) cutting speed v c The instantaneous velocity of the selected point on the cutting edge relative to the main movement of the workpiece. The formula is the following V c equals PI d w n over 1000 times 1 minus 1. V c - cutting speed (m/s); Dw - the surface diameter of the workpiece for processing surface (mm); N -- workpiece speed (r/s). At the time of calculation, the maximum cutting speed should be determined, such as the calculation of the diameter of the surface of the surface when the turning, because the speed is highest and the cutting tool is the fastest. (2) supply of f The relative displacement of the cutter and the workpiece in the direction of movement of the workpiece or tool per week. Feed speed v f is the instantaneous velocity of the selected fixed point relative to the workpiece. V f = fn (1-2) In the formula, v f -- feed velocity (mm/s); N -- spindle speed (r/s); F -- feed quantity (mm). (3) a p for back The number of feeding knives measured by cutting edge points and perpendicular to the working plane. According to this definition, if a vertical car is round, its back can