GENERATIVE CAPP SYSTEM PDF

to computer-aided process planning are the variant approach and The generative approach involves generation of new process plans by means planning systems capable of automatically performing the complete task. Generative Computer Aided Process Planning: A system which automatically synthesizes a process plan for a new component is called. in some generative CAPP systems. CAPP has recently emerged as the most critical link to integrated CAD/CAM system into inter-organizational flow. Main focus.

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Keneth Crow [3] stated that “Manual process planning is ca;p on a manufacturing engineer’s experience and knowledge of production facilities, equipment, their capabilities, processes, and tooling. There are two major components of generative CAPP; a geometry based coding scheme and process knowledge in form of decision logic data.

Retrieved from ” https: Process planning is very time-consuming and the results vary based on the person doing the planning”.

Module G:Computer Aided Process Planning

As improvements are made to production efficiencies, the improvements are automatically incorporated into the current production mix. In some companies the machinists are merely given the drawing and asked to complete the job. All the three tasks: Apart from process planning the manufacturing supervisor has to determine the appropriate cutting conditions for the generativr operations, ensuring that there is least wastage of the material.

Then the supervisor also sets the appropriate time for each machining operations so that the part can be manufactured venerative the stipulated time ensuring the optimum productivity.

With CAPP the routine clerical tasks of the manufacturing engineers are reduced, so they can invest their time in more productive tasks. The task of building and implementing the MES system still requires identifying the capabilities that exist within a given establishment, and exploiting them to the fullest potential. It provides for the planning of the process to be used in producing a designed part.

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Due to this there fapp differences in the sequence of the machining operations developed by different planners. Whether one is using the retrieval system or the generative system, there are number of benefits of CAPP as described below: For example, details such as rough and finished states of the parts and process capability of machine tools to transform these parts to the desired states are provided.

For example, when one changes the design, it generattive be able to fall back on CAPP module to generate manufacturing process and cost estimates for these design changes. Definition of coding scheme 2.

Unlike a Variant Process Planning system that modifies existing plans, each process plan could be defined automatically, independent of past routings.

This system can be used to generate process plan for rotational, prismatic and sheet-metal parts.

In the route sheet there is a list of the production operations and the machine tools that can carry out these operations on the part or the assembly. Traditional CAPP methods that optimize plans in a linear manner have not been able to satisfy the need for flexible planning, so new dynamic systems will explore all possible combinations of production processes, and then generate plans according to available machining resources.

According to Engelke, [4] the need for CAPP is greater with an increased number of different types of parts being manufactured, and with a more complex manufacturing process.

The term “computer-aided production planning ” is used in different contexts on different parts of the production process; to some extent CAPP overlaps with the term “PIC” production and inventory control.

With CAPP the amount of the clerical work is greatly reduced for the process engineers and there are fewer chances of errors.

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This process plan is also used for the new parts that come under the same family. Other capabilities were table-driven cost and standard estimating systems, for sales representatives to create customer quotations and estimate delivery time.

Computer-aided process planning

The parameters are used to produce multidimensional differential equations. Grouping parts into part families 3. Similarly, in case of machine breakdown on the shop floor, CAPP must generate the alternative actions so that most economical solution can be adopted in the given situation. In the generative process planning systems new plan is made automatically from scratch for each part using the computers, without involving genetative assistance.

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Solutions had the flexibility to change over time based on the ability to satisfy agile manufacturing criteria. This page was last edited on 26 Septemberat Further, with computers it becomes easier to generate production routings that are rational, and consistent without depending on generstive experience or the judgment of the individuals. Gennerative using this site, you agree to the Terms of Use and Privacy Policy. A number of methods have been developed for part family formation using coding and classification schemes of group technology GTsimiliarity-coefficient based algorithms and mathematical programming models.

Generarive system created is highly specific, the concepts can be extrapolated to other enterprises. Traditional Manufacturing Process Planning All the three tasks: Development of manufacturing knowledge base is backbone of generative CAPP.

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