Abstract: A method and mechanism for forming a hole through a forged workpiece. During the forging operation an indentation is formed in the upper surface of the workpiece. While the workpiece remains in the forging press, a trepanning tool is placed in the indentation and the top die of the press is used to force the tool almost through the workpiece leaving a thin wall at the bottom of the hole. The workpiece either may be removed from the press while the wall is knocked out to complete the hole, or preferably the workpiece remains in the press and the top die is used to knock out the wall. If the workpiece remains in the press, preferably it is supported on a locating ring which aligns the workpiece and trepanning tool with the top die. Also disclosed is an improved trepanning tool which has external and internal sloping faces extending around its circumference at its lower end.

Abstract: A thickness gauge is shown for measurement with each stroke of a metal blanking and cupping press. The gauge is adapted to be carried with the press ram adjacent to the blanking die. The gauge includes a thickness feeler plunger and reference support for carrying contact pins. The feeler and the support for the pins are mounted for relative motion with respect to the moving part of the press and for limited relative motion with respect to each other whereby the gauge can accommodate press overstroke and varying thicknesses of stock.

Abstract: A method of producing blanks and shaped articles therefrom from sheet material comprises the steps of supporting the sheet material on a blanking die having a substantially cylindrical entrance aperture, an exit aperture and an inwardly converging transition zone extending from the entrance aperture to the exit aperture. A blank is punched from the sheet using a blanking punch having a cross-sectional area less than the extent of the entrance aperture, the blank being punched out by displacing the blanking punch into the entrance aperture. The blank is formed into a shaped article by means of a second punch and die assembly wherein the exit aperture can serve as a blank holder.

Abstract: Elongated, thin wall shells are formed from substantially circular blanks cut from sheet material by steps including providing a blank in a blank holder on a die having an effective entrance and exit aperture, the entrance aperture having an extent substantially commensurate in size with the size of the blank to be drawn, the die having a cavity, the wall of which converges inwardly from the entrance aperture to the effective exit aperture. The wall connecting the entrance and exit apertures is defined by an arc of a sector of a circle, the sector having an angle in the range of 12.degree. to 34.degree.. The thin wall shell is formed by displacing the blank through the die by action of a punch.

Abstract: Apparatus for blanking an integrated circuit (I.C.) chip and the chip's thin flexible ductile leads which extend beyond the four sides of each chip from a segment of film to which the leads are attached and forming the leads including forming a foot at the free end of each lead of the chip in a single operation of a hollow punch having contiguous cutting and forming edges with a contiguous forming surface between them and a hollow die having cutting edges with a forming block having contiguous forming edges and forming shoulders positioned within the die. The punch and die are mounted on a punch press. Alignment means accurately position the chip and its leads with respect to the punch and die. A pressure pad is mounted in the punch and presses the leads against a portion of the forming block to isolate the bonds between the leads and the integrated circuit chip from forces applied to the leads during cutting and forming.

Abstract: A blanking and forming press for sheet metal caps having a fixed cross member, a sleeve constituting the blanking knife housed in the fixed cross member, first and second cross members supported mobile relative to the fixed cross member on its opposed sides, a rod connected at its one end to the first cross member and at its other end to a forming and blanking punch, a cylindrical die supported by the second cross member mobile coaxially to the rod and defining a blanking knife cooperating with the knife defined by the sleeve to form, as the mobile cross members approach each other, a cap member by permanent deformation of a discoidal element cut by the sleeve penetrating into the die.

Abstract: A method of forming a friction disc having projecting teeth including load bearing edge faces, in which one or more surfaces of the disc is indented to reform the edge faces while confined within a die cavity.

Abstract: Single-slide press with single work-input stroke and other characteristics and advantages of single-action press carries out multiple functions of double or triple-action presses in the manufacture of cup-shaped articles. A blank is cut from flat rolled sheet metal and clamped while being drawn into a cup shape; the drum cup can be redrawn into a cup of smaller diameter and greater sidewall height. Work-input force applied to the work product is modified as required for each step with fluid controlled cylinder and piston means mounted to permit relative movement of portions of the single slide means for carrying out the individual steps in sequence.