1. Planning for CNC Operations

2. Coordination of 5 functions u 1. NC management - shop supervisor u 2. Part programming - programmer u 3. Machine operators u 4. Tool and fixture preparation - tool room person u 5. Machine and controller maintenance

3. Process planning - detailed operation plan u person often called a process planner u links engineering design with shop floor machining

4. Planning considerations (6)

5. 1. Raw material considerations u size and shape u amount of material to be removed

6. 2. Datum Selection u reference surfaces for machining and mating parts

7. 3. Process capability u holding tolerances u surface finish quality

8. 4. Process selection and sequencing (p129)

9. 5. Tool path planning

10. 6. Machining parameters u speeds, feeds, depth of cut u depth of cut determined by available spindle horsepower and rigidity of cutter and machine

11. NC documentation (6)

12. 1. Raw material drawings u specs on material type u shape and dimensions of the blank

13. 2. Production drawings

14. 3. Operation sheet u required processes u sequences

15. 4. Tooling plan u list of tools (p157) u offsets (p160) u presets

16. 5. Workholding and machine setup sheet u locating positions u clamping positions u clamping methods u list of locating and clamping devices u special notes - clamping forces, pressures

17. 6. Programming sheet