3-5 Write a NC part program, calculated manually, for milling the parts shown in Fig. 3-21 (dimensions in millimeters).

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3 5 Write A Nc Part Program Calculated Manually For Milling The Parts Shown In Fig 3 21 Dimensions In Millimeters 1 (91.84 KiB) Viewed 21 times

3-5 Write a NC part program, calculated manually, for milling the parts shown in Fig. 3-21 (dimensions in millimeters). Use tab sequential format, incremental programming, and BLU = 0.01 mm. Leading zeros are not programmed. Machining parameters: feedrate 120 mm/min (inverse-time code), and spindle speed, 1440 rpm (magic-three code). Cutter diameter is negligible. Note that the set point is at (20, 0) and the tool must travel back to this point at the end of the cut. Y, mm Cutter center path 80 70 60 Y, mm 50 40 40 30 30 20 20 10 10 X, mm 0 10 X, mm 30 40 50 60 70 80 (a) 0 10 1 30 40 50 60 (b) Figure 3-21 The parts for Probs. 3-5, 3-6, 3-7, 3-10, and 3-11.