A computerized diagraph and matrix approach for evaluation of metal stamping layouts

Evaluation of metal stamping layouts using an analytic hierarchy process method

“…The strip-layout selection factors are identified. The strip-layout selection factors considered are same as of Singh and Sekhon [30] and these are: U r , D c , O c , P r and J a . The objective, selection factors, and the decision alternatives (i.e.…”

“…Singh and Sekhon [30] have presented a strip-layout selection methodology using digraph and matrix approach. The authors have considered an annual production of 400 000 numbers of a blank, shown in Fig.…”

“…It may be mentioned here that Singh and Sekhon [30] have assigned values to J a qualitatively and higher values on the qualitative scale indicate better job accuracy. D c and O c are the non-beneficial factors and lower values of these factors are desired for the given stamping operation.…”

“…sion of selecting a particular strip-layout depends on factors such as material utilization, die cost, stamping operational cost, required production rate, job accuracy, nature of stock (strip or coil), slitting allowance, balance of the blanking pressure, space available in the die set, press specifications, bridge width, shearing strength and thickness of the blank material, facilities available on the shop floor, etc. [26][27][28][29][30]. It is essential ideally to choose the factors that are relevant to the particular problem at hand.…”

PROPLAN: an expert system for optimal planning of sheet metal operations

“…Beside being tedious and time consuming, the manual method of process planning often does not yield optimum results. Low cost knowledge base systems that are capable of providing intelligent advices to the planners of sheet metal operations would be valuable to the small and medium sized enterprises [7][8][9][10][11]. The objective of the present work is the development of an expert system for assisting the process planners and die designers of sheet metal operations.…”