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Title:

Planning for CNC Operations

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Coordination of 5 functions 1. NC management - shop supervisor 2. Part programming - programmer 3. Machine operators 4. Tool and fixture preparation - tool room person 5. – PowerPoint PPT presentation

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Title: Planning for CNC Operations


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

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

4
Planning considerations (6)
5
1. Raw material considerations
  • size and shape
  • amount of material to be removed

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

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

8
4. Process selection and sequencing (p129)
9
5. Tool path planning
10
6. Machining parameters
  • speeds, feeds, depth of cut
  • depth of cut determined by available spindle
    horsepower and rigidity of cutter and machine

11
NC documentation (6)
12
1. Raw material drawings
  • specs on material type
  • shape and dimensions of the blank

13
2. Production drawings
14
3. Operation sheet
  • required processes
  • sequences

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

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

17
6. Programming sheet
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