THE APPLICATIONAL APPROACH OF A COMPUTER AIDED PROCESS PLANNING AND ESTIMATION SYSTEM FOR A PRECISION CASTING UNIT-A CASE STUDY
Keywords:
Computer aided process planning (CAPP), Investment casting, Estimating systemAbstract
This paper describes the application of a computer aided interactive process planning and estimating system for use in a jobbing foundry. This system was developed by international technology corporation with collaboration of largest foundry of UK(Beloit walmsley Ltd along with University of Manchester institute of science &Technology (UMIST).This integrated system developed includes, The facility to estimate the weight of casting, core making and moulding materials from dimensions and shapes taken from drawing, to estimate using man-hours per tonne of casting produced, the manufacturing times in moulding, core making , dressing departments. The system has comprehensive feed-back loop for comparing the estimated weights and times against those actually achieved and the facility for automatically updating the current man-hours per tonne in moulding,core making and dressing departments. The system is menu driven and modular in format of which there are six .the use of the system is described by an example .To test the industrial applicability of the system, data from boundaries were used. The estimated weights and times were compared with data of actually achieved .This capp sheet is more consistent and complete than those which are produced manually. We are taking ideas from this model from various research papers and trying to create specially for the Investment casting unit.
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