- No existing standard plans
- Able to generate process plans for both new and existing parts
- Process plans are generated by means of
Geometry-based coding scheme
to perform uniquely the main decisions for converting a part from raw materials to a finished state.
Requirement of Generative Computer Aided Process Planning:
–Part to be produced must be clearly and precisely defined in a computer compatible format (OPITZ,AUTAP)
Logic of manufacturing must be identified and captured
The captured logic must be incorporated in a unified manufacturing database
•Decision making logic and algorithms
Expert Systems: AI based approaches
Decision Tables in Generative CAPP:
- A decision table program structuring tool provides readable documentation as a automatic by product
- A decision table is portioned into conditions and actions
- Can be used with pre-processor to eliminate some program coding to provide automatic checks for completeness,contradiction and redundancy.
Techniques for Generative Computer Aided Process Planning:
- Identify the machinable volume and attach necessary technological details relevant for mfg.
- Do a preliminary sorting of a pockets in order of levels that clearly indicate the likely sequence in the final process plan
- Examine the pocket for any possibility of combining so that the machining operations could be reduced
- Select the machine tools that can be used for the each of the identified pockets
- Identify the process sequence required for the machining of the pocket based on the technological requirements
- For each of the pocket and the operation decided,select the cutting tool required.
- Sort the operations on the basis of the machine tools and cutting tools .Sequence the operations on the basis of the machine tools and cutting tools by making use of heuristic rules
- Evaluate the machining time and idle time and select the final process plan based on the lowest cost and machining time
- Present the final results in the suitable form.
You can also know about:
- Definition with suitable steps involved in Process Planning(PP)
- What is the structure of Computer Aided Process Planning(CAPP)?
- What are the Advantages and Limitations of VARIANT Computer Aided Process Planning (VCAPP)?
The detailed explanation of Structure and Advantages of Generative Computer Aided Process Planning(GCAPP) is shown below in the form of video.
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