A machine for producing headed blanks from wire stock in which continuous wire stock is fed through a reciprocating ram by means of reciprocating gripper jaws which are adjustable for position and feed length and which are cam urged into engagement with the wire at a specific instant in the machines cycle. The heading machine includes a die block containing a plurality of dies which can be rotatably indexed. The free end of the wire passes through a bush in a cut-off mechanism and into a die cavity disposed at a cut-off station, whereupon an open knife is urged against the wire to sever a blank which is left in the die cavity, the die block then being indexed to subsequent stations where a heading operation is done. Each cavity of the die block has an ejector and all the ejectors are coupled for longitudinal adjustment so that individual adjustment is not required in use.
A multipart article comprising a rod or pin (26) with a sleeve or collar (58) on it is made from one piece of wire by parting off a blank, impact extruding a stem to form the pin or rod, backward extruding a residual portion of the blank to form the sleeve or collar with an internal diameter slightly larger than the diameter of the stem and joined to the stem by a short thin web (64), and then fracturing the web and inserting the pin or rod into the thus separated sleeve or collar. The advantage in manufacturing small articles on a mass production basis is in the economy of forming two parts in one machine operation rather than making them separately, an example being parts of a blind-riveting assembly.
A method and apparatus of cold forming is disclosed for improving die life. During a first phase a workpiece is initially engaged between a pair of dies with a sufficiently low force and velocity level to reduce die errosion but with a sufficiently high level to produce limited deformation of the workpiece and provide an area of mating engagement between the workpiece and the tool and die. During a second phase the workpiece is subjected to substantially higher deforming force and velocity levels and is further deformedto the desired shape. Such area of mating engagement is sufficiently large to reduce errosion producing localized pressures on the tool and die during such second phase. The disclosed machine is a ball header with the movable die mounted directly on the machine frame rather than on the reciprocating slide. The position of the movable die is controlled by a cam driven pusher so that the movable die position is independent of the position of the reciprocating slide. In such machine a workpiece is initially gripped during such first phase while the movement of the tool is controlled by the cam. In the second phase the tool is driven forward by the crank driven slide.
A ball header is disclosed in which the movable die is mounted directly on the machine frame rather than on the reciprocating slide. The position of the movable die is controlled by a cam driven pusher so that the movable die position is dependent of the position of the reciprocating slide. The machine provides a greater portion of the machine cycle for the movement of the transfer from between the dies after the blank is gripped and controlled by dies. The machine further provides a closed or bushing cutter to improve the shearing of the blanks from the wire stock so that the part formed by the machine can be closer to the finished size of the product to reduce the material content and the cost of finishing operations. The accuracy of the positioning of the movable die is also improved by the mounting of the movable die directly on the frame rather than on the reciprocating slide.
4023393 - Eccentric press - Owned by Sebastian Messerschmidt Spezial-maschinenfabrik (Schonungen,DT)
A press for forming articles such as sphere-like objects and the like from workpieces includes a frame having two fixed mating dies mounted thereon and a crankshaft rotatably mounted on said frame, the crankshaft having crank arms actuating movable dies. A stationary shearing bushing means is disposed between the two fixed dies, and means are provided for feeding an elongated rod to the shearing bushing means. The shearing bushing means has an entry side and an exit side, and a movably mounted shearing knife means mounted on the entry side of the shearing bushing means is operable to cut blanks from the elongated rod. A feeding means is movably mounted on the exit side of the shearing bushing means and is operable to simultaneously receive a cut blank at the exit side of the shearing bushing means while delivering another cut blank to one of the fixed dies.
A double-blow header, a fixed die, a tool or punch slide, a crankshaft operably connected to the tool slide for reciprocating the tool slide toward and away from the die, a punch carrier movably supported on the tool slide, a plurality of punch assemblies carried by the punch carrier, each of the punch assemblies comprising a punch and punch knock-out pin and a pivoted punch knock-out lever for advancing the punch knock-out pin in the punch when moved in one direction about its pivot, a new and improved punch knock-out actuating mechanism including a reciprocal rod mounted on a fixed part of the machine and extending in the direction of the tool slide, a lever for actuating the punch knock-out levers of the punch assemblies, a pivoted lever arm for moving the reciprocal rod, and an adjustable timing cam operated at one-half the speed of the crankshaft for swinging the lever arm and thereby actuating a knock-out lever of a punch assembly through the rod when the tool slide recedes from the fixed die.
