Abstract: Machine tools for machining or processing a workpiece can include at least one tool with at least one relative movement between the workpiece and the tool. The machine tool has at least one pressure line circuit with at least one pump unit and with at least one energy storage which is in flow connection with the pump unit via a pressure line, wherein the pump unit has at least one mechanically driven pump element for sucking in or sucking out a medium and is in flow connection with the pressure line, and the pump element is mechanically coupled to a component of the machine tool which is also moved during proper operation of the machine tool in such a way that the component moved by the machine tool drives the pump element.

Abstract: [Problem] To rationalize production steps for a medical stapler. [Solution] An anvil (A): that forms a medical staple (3) supported in conjunction with a ram (5) in a medical stapler; sutures biological tissue; has dimensions corresponding to the formed peak section in the staple (3) after forming; and has a support section (11) that supports the crown (3b) of the staple (3), and a chamfered corner section (12) formed along both end sections in a direction along the crown (3b) of the staple (3) in the support section (11), which comes in contact with the crown (3b) when the supported staple (3) is formed and regulates a curved section thereof. The chamfered corner section (12) is cured by plastic working and formed.

Abstract: A method of using a hydraulically driven pressing device for pressing a fitting on a tube is provided. The pressing device includes a piston and a cylinder for acting on pressing jaws. A piston shaft is connected to rollers. The pressing device can be used to carry out pressing operations requiring different levels of pressing power, by using an adjustable stop which is provided in the direction of displacement of the piston in order to achieve different end positions for the piston during the piston return stroke.

Abstract: The die cushion force setting apparatus according to an aspect of the present invention allows die cushion forces (component forces) acting on plural driving shafts to be set easily, makes it easy to apply strong or weak die cushion forces to a complex-shaped drawn part in a plane of a cushion pad, and provides a smooth die cushion force distribution. An operator manually enters a total die cushion force, axial component force of a left front hydraulic cylinder, and center-of-force position by operating an input device. Based on the information entered via the input device, the numerical computing device B1 calculates axial component forces of three hydraulic cylinders through numerical computations. The one axial component force thus entered and three axial component forces thus computed numerically are set as the axial component forces of four hydraulic cylinders.

Abstract: A method of using a hydraulically driven pressing device for pressing a fitting on a tube is provided. The pressing device includes a piston and a cylinder for acting on pressing jaws. A piston shaft is connected to rollers. The pressing device can be used to carry out pressing operations requiring different levels of pressing power, by using an adjustable stop which is provided in the direction of displacement of the piston in order to achieve different end positions for the piston during the piston return stroke.

Abstract: An application for a device that bends a workpiece includes a rotary hydraulic actuator. The rotary hydraulic actuator is fluidly coupled to a controlled source of hydraulic fluid pressure and has an rotating flange that turns responsive to the hydraulic fluid pressure. A bending member is coupled to the rotating flange of the rotary hydraulic actuator and rotates responsive to the rotational motion of the rotating flange. A bending mandrel is mounted on a face of the bending member at a center of rotation of the bending member and a force mandrel mounted on the face of the bending member. An actuator controls the hydraulic fluid pressure and clips are provided for attaching the device for bending to a boom of, for example, a skid-steer loader.

Abstract: The invention relates to a hydraulically driven pressing device (1) comprising a piston (5) and a cylinder (4) for acting on pressing jaws (8, 8?, 8?), wherein the piston shaft (11) at any rate is connected to acting means (12). To further improve a pressing device of the type in question such that the same device can be used to carry out pressing operations requiring different levels of pressing power, it is proposed that an adjustable stop (33) be provided in the direction of displacement of the hydraulic piston (5) in order to achieve different end positions for the hydraulic piston (5) during the piston return stroke. A method of pressing a fitting with a tube is also described.

Abstract: A die separator cylinder for use in separating first and second portions of a metal forming die set comprises a housing including a bore. A piston is adapted to reciprocate in the bore between an extended position and a depressed position. The die separator cylinder further includes gas flow paths leading to and from the bore that define asymmetrical gas flow rates relative to each other so that said when the bore is charged with an inert gas, the inert gas biases the piston to the extended position with a force that varies depending upon a time interval elapsed since the piston moved from the depressed position to the extended position.

Abstract: A compression tool including a ram; a drive system, a battery and a user selectable retraction control. The drive system is connected to the ram to extend the ram and allow retraction of the ram. The battery is connected to the drive system to at least partially power the drive system. The user selectable retraction control is connected to the drive system. The user selectable retraction control includes a plurality of ram retraction settings which are adapted to be selected by a user to at least partially control respective different retraction stopping locations of the ram.

Abstract: A single action press for forming a shell used to make a can end includes a first tool and an opposed second tool. The first tool includes a die center insert that performs a forming operation on disc cut from a sheet of end material. The first tool is configured and arranged wherein force is supplied to the die center insert during the downstroke and force is removed from the die center insert at the bottom of the downstroke and at the start of the upstroke, to thereby enable the die center insert to disengage from the shell. One specific embodiment uses a die center piston and compressed air to apply force to the die center insert. Another embodiment uses a cam and cam follower arrangement to remove axial forces at the bottom of the downstroke and either springs or gas pressure to apply force to the die center insert during the downstroke.

Abstract: A bending machine with a controlled-return bending die includes a matrix (2) mounted around a spindle (3) having an axis y, a bend arm (4) being able to turn around on the same axis y, and a vice (5) adapted to clamp a section of a workpiece to be bent. A driving element causes the bend arm (4) and the matrix (2), both being connected together by the vice (5), to rotate around the axis y for a set angle from a start position, and a workpiece bending operation is performed for a workpiece section corresponding to the angle. The bend arm (4) carries on itself a controlled return element able to return the matrix (2) to its start position at the end of workpiece bending operation.

Abstract: An electrical connector crimping tool head including a frame, a ram and a connector locator. The frame includes a first mounting area adapted to removably receive a first connector crimping die. The ram is movably connected to the frame. The ram includes a second mounting area adapted to removably receive a second connector crimping die. The connector locator is on the frame and is adapted to indicate proper positioning of an electrical connector relative to the frame for subsequent crimping by the first and second connector crimping dies.

Abstract: A pneumatic force-generating device, for example, a pneumatic cylinder for balancing the ram weight on a press, is provided with an impact or catching device having an impact plate (24) for catching the piston (18) upon discharge of the weight. The deformable impact plate (24) is securely clamped along its edge or held by a clamping device (31), that permits a controlled slipping through. The impacting piston (18) deforms the impact plate (24) to absorb the kinetic energy produced if this piston is released as a result of damage and is accelerated by the existing gas bolster and thrown against the impact plate (24).

Abstract: The pressing method includes the first step of displacing a sub-piston provided within a sub-cylinder from its initial position to press working fluid such that the working fluid is introduced via a check valve into a main cylinder to displace a main piston provided therein, and the second step of causing the sub-piston to return to the initial position such that the working fluid is supplied to the sub-cylinder. The first and second steps are repeated successively until the working fluid in the main cylinder attains a prescribed pressure level. With this method, variation in the way of pressing an object is alleviated, contamination due to the working fluid is prevented, and downsizing of the pressing mechanism is enabled.

Abstract: A hydraulic system comprises a pump having a fluid feed and a fluid release. Hydraulic actuator has an advance port and a retract port. A directional converter is fluidically coupled between the pump and the hydraulic actuator. The converter has a housing having a plurality of fluid passages therethrough. The plurality of fluid passages terminates in a pump outlet port, a pump inlet port, a first actuator port, and a second actuator port. The pump outlet port is coupled to the fluid release of the pump. The pump inlet port is fluidically coupled to the fluid feed of the pump. The first actuator port and second actuator port are respectively coupled to the advance port and the retract port of the actuator. A plurality of valves is disposed within the fluid passages. The plurality of valves has a first position and a second position.

Abstract: A drive for use in the manufacture of cans comprises a hydraulically powered guide pod to which a can bodymaker is attached. The guide pod slides along a guide rod which is fixed in the bodymaker. Forward and rear hydraulic chambers are defined between the pod and the guide rod by means of bushings and a seal. Passage of fluid through ports to and from the chambers causes the pod and bodymaker to move forwards and backwards. The length of the stroke can be set by the distance between the ports. A rotary valve is used to control the timing of the drive and control flow of hydraulic fluid, which is typically obtained from the bodymaker coolant supply.

Abstract: A drive for use in the manufacture of cans comprises a hydraulically powered guide pod to which a hold down assembly is attached. The guide pod slides along a guide rod which is fixed in the bodymaker. Forward and rear hydraulic chambers are defined between the pod and the guide rod by means of bushings and a seal. Passage of fluid through ports to and from the hydraulic chambers causes the pod and hold down assembly to move forward and backward. The length of the stroke can be set by the distance between the ports. A rotary valve is used to control the timing of the drive and control flow of hydraulic fluid, which is typically obtained from the bodymaker coolant supply.

Abstract: A hydraulic press which is small in the temperature rise of hydraulic oil, which can dispense with a water-cooling cooler, which is compact in size and which can realize energy saving is provided. A pressure receiving area of a high speed descent first cylinder chamber 51 and a pressure receiving area of a high speed ascent second cylinder chamber 52—are set equal to each other, and a closed circuit which ranges from the second cylinder chamber 52 to the first cylinder chamber 51 through a hydraulic passage 31, a hydraulic pump 7 and a hydraulic passage 34 is constituted. Using an alternating current servo motor 6, the number of revolutions of the hydraulic pump 7 in positive and counter directions is controlled to thereby control advancement and regress speeds and pressure of a piston member 54.

Abstract: A drive system for the container holder and the travelling beam of a metal extruder press in which a return stroke is accelerated by connecting the annular chambers of the travelling beam and container holder cylinders to a pressurization force and with the full piston area chambers of the container holder connected to a tank, connecting the full piston area chambers of the travelling beam to the pressure source as well.

Abstract: The invention relates to a hydraulic drive system for the tool-bearing slide of a forging press or a forging machine. The slide is configured as a piston and is provided with a valve seat at the opposite end of the tool, that is, the end which is impinged upon by pressure means. Together with a valve lifter driven by an actuator, said valve seat forms a valve which is able to connect the cylinder chamber to a pressureless discharge pipe and therefore control the stroke of the piston. In order to reduce the mass and the axial construction length of the inventive drive system, the piston is hollow over a portion of its length from the end which is impinged upon, and is provided with the valve seat at the base of the hollow. The valve lifter, which can be axially displaced in the cylinder lid, is tubular in shape and is provided with side channels connecting its inner cavity to a pressureless discharge pipe for the pressure means.