Patent ID: 6009787
Filing Date: 2000-01-04
Classification: B21D,B23P,F02M,Y10T

Abstract:
A process for the mass production of orifice disks for multihole fuel-injection nozzles, comprising:prefabricating a plurality of sheet-metal workpieces having a polygonal contour which is designed so as to define a plurality of predetermined angular positions for each workpiece on a stationary punch die when a given workpiece of the plurality of workpieces engages lateral stops on the stationary punch die to determine an arrangement of oblique holes in the workpiece; andpunching a plurality of oblique holes successively in each of the plurality of workpieces having a polygonal contour with a single punch by stepwise angular adjustment of each of the plurality of workpieces in relation to the punch:wherein each oblique hole is punched in a given workpiece of the plurality of workpieces by positioning the given workpiece in a predetermined angular position between the lateral stops of the stationary punch die which has an inclined bearing surface, andwherein the angular adjustment of the given workpiece for punching oblique holes successively involves removing the given workpiece from the stationary punch die after punching an oblique hole, rotating the given workpiece, and positioning the given workpiece in another angular position for punching a further oblique hole, and wherein the removal, rotation, and positioning of the given workpiece is repeated until all the oblique holes of a required hole arrangement have been punched such that the given workpiece has a plurality of oblique holes.