Write a CNC Part Program for the figure shown. For side milling, take speed 1200 rpm & feed 100 mm/min For drilling holes, take speed 1200rpm & feed 80mm/min For slot milling, take speed 1200rpm & feed 120mm/min Take hole diameter as 15mm Use absolute coordinate system. The depth of cut is controlled by the size of bearing on the slot cutter arbor. Slot cutters are 1-7/8' in diameter with a 5/16' arbor hole. Depth of cut by bearing size - Bearings and arbors sold separately Use 5/16' ID x 1-3/8' OD bearing for 1/4' depth of cut. Key slot milling – roughing of full slot Side milling – finishing all around the slot, using up-milling to create true square corners The radial depth of cut should be kept low in finishing operations to avoid deflection of the cutter, which is a major cause of bad surface finish and/or deviation from a true 90° shoulder.
Submit by: BEATA
Summary
Q. Write a CNC Part Program for the figure shown
Slot Milling Depth Of Cut Outs
For side milling, take speed 1200 rpm & feed 100 mm/min
For drilling holes, take speed 1200rpm & feed 80mm/min
For slot milling, take speed 1200rpm & feed 120mm/min
Take hole diameter as 15mm
Use absolute coordinate system.
Solution:
Sequence of operation:
1 Set ref point, cordinate system, tool, give feed & speed value
2 Set cutter for radius compensation left offset
3 set tool at A, start spindle & give down feed (-Z direction)
4 proceed further cutting of side milling and stop spindle at A
5 Move tool at ref point & set the tool for slot cutting
6 Move tool to P, start the spindle & give down feed
7 Proceed further cutting of slot milling and stop spindle at S
8 Move tool at ref point & set the tool for drilling
9 Move tool to P, start the spindle & give full depth cut
10 Move tool up & stop the spindle.
11 Bring back tool at refrence point.
12 End of the program