Buscar
Estás en modo de exploración. debe iniciar sesión para usar MEMORY

   Inicia sesión para empezar

level: Computer-aided process planning

Questions and Answers List

level questions: Computer-aided process planning

QuestionAnswer
Retrieval (variant) CAPP systemsThis is an older CAPP system based on Group Technology and parts classification & coding. Standard process plans are stored in computer files with each part code number - Plans are based on current part routing - For each new part, the standard plan is edited - If file doesn't exist, can search a similar code name and edit it to become the standard plan for the new part - Final step is the process plan formatter which may call on other application programs e.g. design cutting conditions, computing cost estimates
Group Technology- A manufacturing philosophy where similar parts are grouped together to take advantage of similarities in design and production - Similar parts are arranged into part families
Generative CAPP systems (newer)- Newer CAPP system - Process plans are created using rules a human may follow. - In fully generative CAPP systems, process sequences can be planned without any human assistance or predefined standard plans - Expert system required to build generative CAPP systems
Components of an Expert system for a generative CAPP systemKnowledge base - Technical knowledge of manufacturing and logic Computer-compatible part description - Description of product needed for the process sequence Inference engine - Algorithm that applies planning logic and process knowledge located in the knowledge base
Dynamic, generative CAPP- Still developing CAPP system - Artificial intelligence is used to produce process plan - Considers plant and machine capacities, tool availability, work centre, equipment loads and status - Smooth blending between process and production
Benefits of CAPP- Process rationalisation and standardisation - Increased productivity - Reduced lead times to prepare process plans - Improved legibility over manually written route sheets - Can be integrated with other applications (e.g. design cutting conditions, computing cost estimates) - CAPP is good for discrete parts with significant numbers of products and steps