THE ACCURACY ASPECT IN SET-UP DETERMINATION FOR SHEET BENDING

Tolerance prescriptions, defined on a component, must be taken into ac count in manufacturing and in process planning. For the bending of she et metal parts, the accuracy aspects must be addressed in sequencing a nd positioning procedures. In bending, the shape of a part changes not only locally, but globally as well. Therefore, sheet metal part manuf acturing presents some specific problems as regards reasoning about to lerances. The paper describes the use of the so-called ''tolerance tre e'' in sequencing procedures for bending to be used in an integrated C APP system.