5. Write the part program to drill the holes in the part in figure shown and as

Question

5. Write the part program to drill the holes in the part in figure shown and as outlined in the CNC ool and operations sheet. Set the part origin (X- Yo) at the lower left-band corner and Zo at the top of the part. The machining is done in the number sequence as indicated in the figure Part program should be in the word address format using absolute positioning.(15 pint Reterence point machine hame) Took change position Metric 040 3 holes (thru) 115! 460 Pat origin 0672 2 holes (hu CNC Tool and Operations Sheet Operatian Drill (31 04 holes Oil (2) 067 ha Taeling 04mm dill 46.7 mm dril 2200 60 1800 80

Explanation / Answer

Part program to drill the holes in the part in fig.:

O0001 //program number

N10 G21 G94 G90 G17 //G21 specifies Metric units, G94 specifies feed in mm/min, G90 specifies Absolute coordinate reference, and G17 specifies XY plane selection

N20 G28 X-460 Y115 Z50 // specifies Reference point

N30 M06 T01 // M06-tool change, T01- tool number

N40 M03 S2200 // Rotates spindle in clock wise direction with 2200rpm of speed

N50 G00 X45 Y15 //tool goes to position X Y coordinates with rapid movement

N60 G00 Z2 //tool moves in z directions with rapid movement

N70 G99 G81 X45 Y15 Z-12 R2 F60 //starts drilling canned cycle

N80 X33 Y26 //repeats the drilling cycle

N90 X11  //repeats the drilling cycle

N100 G80 G00 X11 Y115 // ends drilling cycle and rapidly moves to XY position

N110 M05  //stops the spindle

N120 M06 T02 //Tool 01 is replaced by tool 02

N130 M03 S1800  // Rotates spindle in clock wise direction with 1800rpm of speed

N140 G99 G81 X22 Y8 Z-12 R2 F80  //starts drilling canned cycle

N150 X55 //repeats the drilling cycle

N160 G80 // ends drilling cycle

N170 G28 Z50 //Makes the tool to go to home position in Z direction

N180 G28 X-460 Y115 //Makes the tool to go to home position in XYdirection

N190 M05 M30 //stops the spindle and program end

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