G71 G72 G73的讲解（国外英文资料）.docVIP

G71 G72 G73的讲解（国外英文资料） The nc lathe compound command (G71, G72, G73, G74, G75, G75, G76) is frequently used, suitable for the processing of large amount of spare parts and the processing programming of castings and castings. The compound command does not require the writing of elaborately processed paragraphs, not only for short paragraphs, but also to effectively shorten the auxiliary time of programming. The compound command is a rough loop that requires the processing of the G70 command. The following is an analysis of the use of the common compound commands G71, G72, G73, and the processing route (the following are examples of FANUC systems). G71 - internal and external rough processing cycle The G71 rough-car circular command is mainly used for the rough-car cycle of the radial dimension, which is high in diameter and is larger than the radial size. (1) format And then we have G7l U of delta R of e. G 71 P (ns) Q (n # 402;) U of delta u. S (S) T (T); G70 P (ns) Q (n # 402;) ; In the format, delta d is the depth of the cutting (the radius is specified, without the plus or minus signs, and the modal instruction); E is the number of retreats (modal instructions); The first paragraph number of the segment of the fine car. N the # 402; Closing paragraph number for the complete segment of the car; Delta u is the remainder of the fine car in the x direction (with positive and negative signs, diameter instructions); Delta omega is the remainder of the fine car in the z direction (plus or minus signs); The # 402; The speed, spindle speed and tool function of the feed in the rough processing cycle. The G70 is a pure car loop, which cannot be used alone, after the complex loop instruction of the cart. (2) illustrates circular trajectory As shown in figure 1, AB for workpiece contour line, cutting tool PM fast moving from C to D, mobile distance for car allowance, then according to the given x axis feed, cutting depth for the axial turning, the blade when 45 according