Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

66. PROCESS PLANNING

 

· Process planning is the selection of operation and parameters required to manufacture a part.

 

· A process plan is a list of operations required to manufacture a part.

 

· This technique is quite inexact, and never perfect.

 

· Some strategies that can be used to do process planning are,

  1. - Technology driven features
  2. - Most significant feature first

 

· In general a process plan is put together in pieces, but at all times we will be trying to convert features on the design to operations on the process plan.

 

· Many of the parameters that effect the process planning decisions are related to a part, and to a process being considered.

  1. - lead times
  2. - processes available
  3. - tolerances
  4. - feature geometry
  5. - standard features
  6. - surface finish/roughness
  7. - geometry complexity
  8. - material types
  9. - material properties
  10. - part shape
  11. - largest dimension
  12. - section thickness
  13. - length to width ratio
  14. - hole diameters
  15. - corner radii
  16. - quality control
  17. - quantity produced
  18. - economic batch size
  19. - capital costs
  20. - tooling costs
  21. - lead time
  22. - material waste
  23. - production rate
  24. - tool life
  25. - environmental impact

 

 

 

66.1 TECHNOLOGY DRIVEN FEATURES

66.2 MOST SIGNIFICANT FEATURE FIRST

66.3 DATABASE METHODS

66.4 MANUFACTURING VOLUMES

66.5 STANDARD PARTS

66.6 PRACTICE PROBLEMS

66.7 REFERENCES