Abstract: A parts placement calculation system comprises parts selection means 18 for selecting parts with the highest parts point value, store selection means 20 for selecting a store with the highest store point value, and placement determination means 22 for determining whether or not parts can be placed in a store based on a predetermined constraint condition for placing the parts. When the placement determination means 22 determines that parts cannot be placed in a store, the store is deleted from a list of placement possible stores, and then the store selection means 20 is activated again. When the placement determination means 22 determines that parts can be placed in a store, a parts area for placing the target parts are determined within the store. Then, after the parts are deleted from the list of parts to be placed, the parts selection means 18 is reactivated.

Abstract: A parts placement calculation system comprises parts selection means 18 for selecting parts with the highest parts point value, store selection means 20 for selecting a store with the highest store point value, and placement determination means 22 for determining whether or not parts can be placed in a store based on a predetermined constraint condition for placing the parts. When the placement determination means 22 determines that parts cannot be placed in a store, the store is deleted from a list of placement possible stores, and then the store selection means 20 is activated again. When the placement determination means 22 determines that parts can be placed in a store, a parts area for placing the target parts are determined within the store. Then, after the parts are deleted from the list of parts to be placed, the parts selection means 18 is reactivated.

Abstract: A method of centering a hollow cylindrical piece of work comprises measuring the outside and inside diameters and contours of the work by means of outside- and inside-diameter-measuring instruments relative to the common centerline of the instruments taken as the virtual center of the work, inputting the measured values with corrections made for any deflection of the work and for any error arising from the instruments, to an electronic computer, and allowing the computer to memorize the information and operate to find the real center of the hollow cylindrical work on the basis of the stored information, whereby the location of the real center and machining allowances necessary for obtaining a product finished to the desired contours can be be computed.