数控车床基本指令(下)（Basic instructions of NC lathe (next)）.docVIP

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数控车床基本指令(下)（Basic instructions of NC lathe (next)）.doc

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数控车床基本指令(下)（Basic instructions of NC lathe (next)）

数控车床基本指令(下)（Basic instructions of NC lathe (next)） NC programming Basic instructions of NC lathe (next) Author: Source: Click: 0 update time: 2008-10-9 14:36:41 Basic instructions of NC lathe (next) 2) end face roughing compound cycle (G72) Instruction format: G72, W, Delta, D, Re G72, Pns, Qnf, U, Delta, u, W, Delta, W, Ff, Ss, Tt Instruction function: the instruction function is the same as that of G71 except that the cutting is performed in parallel X axis, as shown in figure 20. Instruction specification: The meanings of d, e, ns, NF, U and delta W are the same as those of G71. Example: as shown in Figure 22, use end face roughing cycle instruction programming. Fig. 22 example of compound cycle of end face roughing 23 fixed shape cutting compound cycle N010 G50 X150 Z100 N020 G00 X41 Z1 N030 G72 W1 R1 N040 G72 P50 Q80 U0.1 W0.2 F100 N050 G00 X41 Z-31 N060 G01 X20 Z-20 N070 Z-2 N080 X14 Z1 N090, G70, P50, Q80, F30 3) fixed shape cutting compound cycle (G73) Instruction format: G73, U, Delta, I, W, Delta, K, Rd G73, Pns, Qnf, U, Delta, u, W, Delta, W, Ff, Ss, Tt Instruction function: suitable for casting, forging, forming a kind of workpiece, as shown in figure 23. Instruction specification: Delta I represents the total axial retract (radius value) of the X; Delta K represents the total axial Z retract; D represents the number of cycles; NS represents the ordinal number of the first segment of the finishing line; NF represents the ordinal number of the last segment of the finishing line; Delta u represents the finishing allowance (diameter value) in the X direction; Delta w represents the finishing allowance in the Z direction. Characteristics of fixed shape cutting compound cycle instruction: The tool path of A. is parallel to the contour of workpiece, so it is suitable for machining, casting and forging forming blank; B. depth respectively by X axis total Cutter Withdrawal of delta I and Z axis K divided by the number of cycles of total return amount D is obtain