Computer Aided Process Planning Poster
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This document discusses computer-aided process planning (CAPP). It defines process planning as the systematic determination of manufacturing methods to produce a part from raw materials to finished form. CAPP uses computers to assist process planners by storing and retrieving data, or automatically generating process plans for simple shapes. There are two main CAPP approaches: the variant approach retrieves existing generic plans and edits them, while the generative approach creates new plans from scratch without human intervention. Both have advantages like reduced planning time and costs, but the generative approach can plan new parts more easily and provide detailed automation control information.
Computer Aided Process Planning Poster
- 1. Submitted by: Jyotiraman De Roll no.-5 • Product design print–defines all of the companies product characteristics • Service design print is unique in that the service and entire service concept are being designed • Product and service design print must match the needs and preferences of the targeted customer group PART PRINT ANALYSIS COMPUTER AIDED PROCESS PLANNING Process planning can be defined as the systematic determination of the detailed methods by which work pieces or parts can be manufactured economically and competitively from initial stages (raw material form) to finished stages (desired form). Defining Process planning Initial Form Final Form Input design data raw material data facilities data quality requirements data production type data Output process plan sheet process sheet operation sheet route sheet route plan part program Defining Computer Aided Process planning - CAPP Computer Aided Process Planning (CAPP) can be defined as the functions which use computers to assist the work of process planners • The levels of assistance depend on the different strategies employed to implement the system. Lower level strategies only use computers for storage and retrieval of the data Higher level strategies use computers to automatically generate process plans for some work pieces of simple geometrical shapes. BENEFITS OF CAPP 1. Reduction in process planning time. 2. Reduction in the required skill of the process planner. 3. Reduction in costs due to efficient use of resources. 4. Increased productivity. 5. Production of accurate and consistent plans. APPROACHES OF CAPP In general, two approaches to CAPP are traditionally recognized: • the variant approach or retrieval approach, • the generative approach, THE VARIANT APPROACH OF CAPP • The variant approach, which is also called retrieval approach, uses a group technology (GT) code to select a generic process plan from the existing master process plans developed for each part family and then edits to suit the requirement of the part. ADVANTAGES 1. Once a standard plan has been written, a variety of components can be planned. 2. Programming and installation are comparatively simple. 3. The system is understandable, and the planner has control of the final plan. 4. It is easy to learn and easy to use. 1. The components to be planned are limited to previously planned similar components. 2. Experienced process planners are still required to modify the standard plan for the specific component. 3. Details of the plan cannot be generated. 4. Variant planning cannot be used in an entirely automated manufacturing system, without additional process planning. DISADVANTAGES THE GENERATIVE APPROACH OF CAPP In a generative approach, a process plan for each component is created from scratch without human intervention. These systems are designed to automatically synthesize process information to develop a process plan for a part ADVANTAGES 1. Consistent process plans can be generated rapidly. 2. New components can be planned as easily as existing components. 3. It has potential for integrating with an automated manufacturing facility to provide detailed control information. Department of Mechanical Engineering – M. Tech (CAD/CAM) 2014-15