Abstract: A method to form a product from a work-piece in a press is provided. The press includes a top tooling and a bottom tooling and a clamping device. The method comprises pressing the work-piece at a first stage of a top tooling movement in the bottom tooling; and clamping and pressing the work-piece at a second stage of the top tooling movement in the bottom tooling.

Abstract: A forming press for forming a sheet-like blank has a first thermally insulated frame part having a die with a negative engraving and a second thermally insulated frame part defining a chamber and having a punch movably disposed in the chamber. The sheet-like blank rests in a sealing manner on the second frame part and covers the punch so as to define a pressure chamber with the punch therein. A pressure generator provides a pressurized gas to the pressure chamber during a forming process.

Abstract: A hydraulic cylinder is provided which allows for a mount plate, or the like, to be moved between three positions. The mount plate can be positively positioned in any one of three different positions by appropriately supplying or removing pressurized hydraulic fluid to hydraulic fluid ports on the cylinder. The provision of appropriate positive stops corresponding to each desired position avoids the necessity for complex and/or expensive hydraulic control mechanisms. The cylinder is believed to be particularly suited for performing piercing operations, involving a negative pierce, in hydro-forming operations.

Abstract: The invention relates to a drive device (1) for a bending press (3), in particular a press brake, with a press frame (10) comprising a stationary press beam (2) and having a press beam (4) which can be displaced relative to the press beam (2) by means of a beam adjusting device (6) formed by a closed hydraulic system (5) comprising a hydraulic pump (46) with a controllable drive motor (47), at least one control valve (48) and at least one hydraulic linear actuator (7). The linear actuator (7) comprises a first piston arrangement (25) with a first piston (27) dividing a cylinder chamber (34) into a first pressure chamber (35) and a second pressure chamber (37) and, in another cylinder chamber (39), a second piston arrangement (26) with another piston (28) and at least one other pressure chamber (40). The first piston arrangement (25) and the second piston arrangement (26) are coupled with one another.

Abstract: A method and apparatus for forming cup-shaped members used in conjunction with a single-acting or a double-acting press having an outer punch assembly, an inner punch assembly and a base. A draw pad and a cutting edge are carried on the outer punch assembly, a draw horn is carried on the inner punch assembly and a blank and draw die is carried on the base. The draw pad and the draw horn oppose the blank and draw die such that the draw pad clampingly engages the blank and draw die in order to exert a clamping pressure on the pressure piston system having first and second pistons vertically stacked with respect to one another. The pressure piston system includes a damping member located within the pressure piston system for continuously increasing the clamping pressure during advancement of the outer punch assembly toward the base of the press.

Abstract: Disclosed herein is a method for making an item of jewelry. The method includes the steps of providing a chain comprising a plurality of links; providing at least one bead having an opening defined therethrough; providing a press having a support member, a hammer, and at least one pin; positioning the bead on the chain; resting the bead on the support member; positioning a first link on the at least one pin; and actuating the press, whereby the first link is widened. In a preferred embodiment the item of jewelry is a rosary.

Abstract: A hydraulic tool including a frame; a ram movably connected to the frame; and a hydraulic drive system on the frame for moving the ram on the frame by hydraulic pressure. The hydraulic drive system includes an automatic release system for automatically releasing hydraulic fluid from the hydraulic drive system. The automatic release system comprises a first valve which is adapted to be automatically opened by a predetermined hydraulic pressure and a second valve which is adapted to be opened by hydraulic fluid passing through the first valve.

Abstract: A power hammer assembly providing forming capabilities while remaining economical with respect to performance, vibration, footprint size and acquisition costs. The power hammer assembly can provide for a single stroke speed and/or a single set stroke with respect to the striking of die assemblies against a piece of metal. The power hammer assembly can provide for a large throat area and/or a larger die gap for ease of use. The power hammer assembly can include adjustment features allowing for the use of die sets of varying configurations such as, for example, shank size, shank length or alternatively, die sets fabricated for use with other machinery. In addition, the power hammer assembly can include a belt transmission assembly designed to slip in the event of die interference during set-up or operation so as to avoid damaging the power hammer assembly.

Abstract: A portable pneumatic compression riveter consists of a valve, air cylinder and rivet head assembly consisting of an alligator style set of jaws or a c-yoke style jaw set that is used to upset solid rivets used primarily, but not limited to, the aerospace industry. Disclosed is a series of improvements that make the tool lighter, more reliable and safer to operate.

Abstract: The invention relates to a device for pneumatically operating a tool which can be driven by means of pressure, such especially, pneumatic pliers. The device has a cylinder comprising one or more pneumatically operated, nonpositively fitted pistons arranged in a row, for generating a translatory force. The respective piston rods of the pistons are sealed against the preceding piston and guided in cylinder covers by means of a seal, such as a lip seal. Components such as a wedge piston are functionally connected to the pistons, said wedge piston being coupled to a cuneiform wedge, for transferring the translatory force and for operating the tool. The pistons are supported by at least one piston guidance strip, in the direction against the inner wall of the cylinder.

Abstract: A tryout of a metal mold for a mechanical press suitable for mass production is carried out with a hydraulic press in accordance with the same motion curve as that of the mechanical press so as to reduce metal mold corrections at a job site as much as possible. When trial molding is carried out, an adequate amount of oil capable of obtaining a press motion curve of the mechanical press in accumulators is accumulated so that a predetermined amount of oil can be supplied to a plurality of pressing cylinders of the hydraulic press, hydraulic oil selectively is supplied to a predetermined pressure cylinder of a plurality of pressure cylinders and hydraulic control is applied to the pressure cylinders by a servo valve so as to obtain a coincidence with a press motion curve of a mechanical press with predetermined output.

Abstract: A hydraulic compression tool having a frame, a hydraulic fluid reservoir on the frame, a ram movably connected to the frame, a conduit system in the frame between the reservoir and the ram, a pump provided in the conduit system, a mechanical actuator provided in the conduit system for contacting the ram, and a bypass valve in the conduit system between a rear end of the ram and a channel of the conduit system to the rear end of the mechanical actuator. The conduit system is adapted to conduit fluid from, the pump against both the rear end of the ram and a rear end of the mechanical actuator. The bypass valve is located, at least partially, in a housing member of the mechanical actuator.

Abstract: A method as well as an apparatus manufactures a punch riveted joint, wherein at least two layers are pressed by a holding-down device against the die and a rivet, in particular a semitubular rivet, is provided for joining the layers. The holding-down device is connected by a coupling unit to the punch in such a way that during a punch riveting operation a coupling of the holding-down device to the punch may be varied between a substantially rigid coupling state and an uncoupled state.

Abstract: A press-connecting punch (3) for press-fitting the sheathed wire (40) into a slot between each pair of opposed press-connecting blades (33) of the press-connecting terminal (30), supported on a bed (1), is moved downward to act on the sheathed wire (40) prior to the downward movement of a clamping punch (13) for pressing a wire holding portion (35) of the press-connecting terminal (30) into clamping engagement with a sheath (41) of the sheathed wire (40).

Abstract: A press-connecting punch (3) for press-fitting the sheathed wire (40) into a slot between each pair of opposed press-connecting blades (33) of the press-connecting terminal (30), supported on a bed (1), is moved downward to act on the sheathed wire (40) prior to the downward movement of a clamping punch (13) for pressing a wire holding portion (35) of the press-connecting terminal (30) into clamping engagement with a sheath (41) of the sheathed wire (40).

Abstract: A hydraulic machine for operation such as for pressurizing a workpiece and molding products from materials by using a reciprocation mechanism comprising a hydraulic cylinder unit. The cylinder unit comprises two types cylinder chambers having different cross-sectional areas, and a third or plural cylinder chambers. Hydraulic oil sent out from a hydraulic pump driven by a servo motor, is fed through a hydraulic circuit into the cylinder unit. The shifting position of the reciprocation movement is detected, and path switching in the hydraulic circuit and revolving operation of the servo motor are controlled on the basis of the detected shifting position. In case the reciprocation movement is used for pressurizing a workpiece by a die, the hydraulic oil is fed to the cylinder chamber for forward of small cross-sectional area until slightly before the die comes into contact against the workpiece, and the die shifts at high speed relative to a workpiece.