Abstract: The apparatus for punching holes in a work member includes a weight-balanced frame member having supported thereon opposed punching die and a matrix. The frame is initially moved vertically to properly position the matrix and die relative to the member to be punched. Located adjacent the matrix are sensing elements that are positioned to be contacted by the member to be punched, which sensing elements, when contacted stop the vertical movement of the frame. This arrangement substantially reduces the pivotal movement of the frame member which occurs during the punching operation and thus greatly minimizes the movement of the balancing weight that is mounted on a lever to maintain the frame in the balanced position free of contact with the member to be punched and thus avoids any substantial acceleration of the weight member which could adversely affect the punching operation.
Abstract: A stamping device with vertically guided frame, which carries the matrix and vertically guides the stamping punch. When the vertically movable stamping punch hits the workpiece to be punched, the frame of the stamping device is lifted until the matrix engages the bottom side of the workpiece, whereupon in response to a further downward movement of the punch, the punching operation is carried out. The frame has associated therewith a balancing weight which is adjustable on the longer arm of a two-arm lever between two side plates of the frame, whereas the shorter arm of the two-arm lever supports the frame. The free end portion of the longer lever arm is connected to the frame by compensating and cushioning spring means.
Abstract: A cutter mechanism for cutting the ends off bar stock or the like wherein the bar stock is moved incrementally into a cutting station with reciprocating cutters for cutting a piece off the end with said piece in the cutting station, a vertical support below the piece in the cutting station movable laterally between a support position beneath the cutting station and a release position laterally away from the station, a stop member against which the piece engages in the cutting station with the stop member movable laterally between a stop position engaging the piece means including a pivotal arm wherein the point of connection between the vertical support and the arm is adjustable so as to be able to independently control the lateral movement of the support relative to the stop member while the support and the stop member move simultaneously with the arm.