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HW2_Solution

# HW2_Solution - 1 Prepare an NC part program for the part...

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1. Prepare an NC part program for the part shown in Figure HW2. The suggested cutting conditions are 5 ipm for the feed rate and 300 fpm for the speed. The cutter diameter is 2.5 in. The dimensions are all in inches. (25 points) Assume the cutter length is defined by H02 and the cutter radius is defined by H10. Fig. HW2.1 Part drawing Solution: (Students’ coordinate’s definition can be different from this solution) (RPM TO FPM: http://www.pacificmarine.net/packingfeetperminuteconv.htm) N5 G40 G54 G20 ; Cancel cutter radius compensation, zero offset, measuring in inches N10 G43 H02 ; Tool length compensation, the value of length. N15 M03 S460 ; Turn on spindle clockwise, speed is 460 rpm. (rpm=FPM/ (pi*Dia)) N20 G00 X1.5 Y1.5 Z2.2 ; Fast linear motion to the given coordinate. N25 G01 G41 H10 X2 Y2 Z1 F5 ; Linear motion, left cutter radius composition, coordinates, feed rate. ; G41, give NC machine edge coordinates, machine find cutter center coordinates. N30 (G01 X2) Y7 (Z1) ; Continue linear motion, G01, X2 Z1 can be omitted. N35 X10 N40 X12 Y6 N45 Y2 N50 X2 (N55 Z2.2) (N60 G00 G40 X7 Y4.5 Z2.2) (N65 M30 ) N55 G00 Z2.2

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