Abstract: The invention relates to a speed-changing shearing or forming active element insert which is designed to be detachably connected to an active element receptacle of a machine tool, the speed-changing shearing or forming active element insert having a speed-changing unit which is in the form of a hydraulic force/distance transducer, the force/distance transducer comprising a housing, the housing interior of which is supplied with a hydraulic fluid, and the force/distance transducer comprising a first piston which is in oo contact with the hydraulic fluid via one piston end and a second piston which is in contact with the hydraulic fluid via one piston end and the cross-sectional area of which is smaller than the cross-sectional area of the first piston. The invention also relates to the use of the speed-changing changing shearing or forming active element insert in a machine tool.

Abstract: Method and Apparatus for fabricating a spacer frame for use in an insulating glass unit. One of a multiple number of possible spacer frame materials is chosen for the spacer frame. An elongated strip of the material is moved to a notching station where notches are formed at corner locations. The character of the notches is adjusted based on the selection of the metal strip material and more particularly to achieve bending of the material in a repeatable, straightforward manner. Better control over the notching process is also achieved by exhaust flow control of a double acting cylinder. A positioning spacer achieve very accurate side to side positioning of a die and anvil to precisely notch and deform the metal strip. Downstream from the notching station the metal strip is bent into a channel shaped elongated frame member having side walls. Further downstream a leading strip of channel shaped material is severed or separated from succeeding material still passing through the notching and bending station.

Abstract: A gas-operated integrated punching device with plate presser, including: a tubular containment body closed hermetically by a bottom and by a head that is perforated for the passage of a piston-operated plate presser moving within the tubular body; the plate presser being crossed coaxially by a punch connected to the tubular body; a compression and expansion chamber for loading pressurized gas being formed between the plate presser and the bottom such that the pressurized gas pushes the plate presser between a first fully extracted configuration with the outer end of the plate presser not in contact with a metal plate to be woked and protruding from the head by such a length as to affect the tip of the punch, and a second configuration at least partly retracted into the tubular body with the outer end of the plate presser in contact with a metal plate being worked.

Abstract: To increase the cutting quality and to improve the operation of a press, in particular in punching high-strength martensitic materials or when punching thick sheet metal, a sheet metal holding device is provided for securely clamping the respective workpiece during the punching operation. The clamping force is increased to 40% or more of the ram force. The force exerted by the sheet metal holding device during the penetration of the workpiece can be further increased. The increase in the clamping force preferably takes place in a controlled manner as a function of the press angle.

Abstract: A gas-operated integrated punching device with plate presser, comprising a tubular containment body closed hermetically at one end by a bottom and at the opposite end by a head that is perforated for the passage of a piston-operated plate presser, which performs a translational motion within the tubular body; the plate presser is crossed coaxially by a punch, which is jointly connected to the tubular body; a compression and expansion chamber for pressurized gas is formed between the plate presser and the bottom, the gas being loaded into the chamber by way of loading elements inserted in the bottom or in the tubular body; the pressurized gas pushes the plate presser between two configurations, a first fully extracted configuration, in which the outer end of the plate presser is not in contact with a metal plate to be blanked or punched and protrudes from the head by such a length as to affect the tip of the punch, and a second configuration, which is at least partly retracted into the tubular body and in whic

Abstract: The press slide of a hydraulically or mechanically driven precision blanking press is non-positively connected with a crosshead by means of columns. The knife-edged ring cylinder is integrated in the crosshead and the supporting force of the knife-edged ring cylinder is taken up by the slide. During a cutting stroke, there is no relative movement between the knife-edged ring cylinder with piston and the slide. The counter cylinder is located in the lower crosshead of the stand. During a cutting stroke, there is no relative movement between the counter cylinder and the workpiece in the tool. The working force of the main drive is not reduced by the pressing force of the knife-edged ring and counter cylinder.

Abstract: An apparatus for punching transversely throughgoing coaxial holes in spaced walls of a workpiece has a holder supporting the workpiece and an outer tool part formed with a pair of transverse bores and displaceable between an advanced position engaged over the workpiece on the holder and outwardly flanking the walls and a retracted position spaced from the holder. An inner tool part formed with a transversely throughgoing bore is displaceable in the advanced position of the outer tool part between an advanced position engaged between the walls and with its bore coaxial with the bores of the outer tool part and a retracted position with its bore spaced from the workpiece in the holder. The outer tool part is formed with a waste passage aligned with the inner-part bore in the retracted position of the inner part.

Abstract: A gas cylinder with internal time delay which is entirely self contained within the cylinder. A valve pin that controls communication between the two sides of the piston through one or more a one-way valves in the piston. As each piston is moved by a die into the cylinder body, it exposes a portion of reduced cross section on a valve pin and gas flows through a one way valve such that the effective area of the piston is reduced. When the die moves away from the workpiece, a time delay occurs and the piston is delayed until the piston moves upwardly and closes communication between the sides of the piston.

Abstract: A vibration finishing method and apparatus in which the surface roughness and form of a hole in a compound material such as a printed board can be made excellent and the working accuracy of the hole can be significantly improved and the working cost of the hole can be lowered. In the punch pressing device, a compound material is fixed to a lower metal mold having a lower die hole into which a punching tool can be inserted. While the compound material is held between the lower metal mold and a pressing plate and pressed by pressing members provided with the pressing plate having an upper die hole into which the punching tool can be inserted, a minute-vibration of frequency of several ten hertz is applied onto the punching tool and then, the compound material is punched out. After that, the punching tool is temporarily drawn from the hole to be worked in the compound material.

Abstract: A punching die includes a punch body, a punch guide fitted on the punch body movably up and down with respect to the punch body, a punch head provided on a top portion of the punch body, and a gaseous spring provided between the punch body and the punch guide for pushing the punch guide downwardly with respect to the punch body. The gaseous spring is cylindrical and fitted on the punch body detachably, and includes a device for restricting a maximum length of the gaseous spring.

Abstract: A stripper device for a punching tool comprises: a gas cylinder (5) filled with a gas (7) having a cylinder head (27) and a cylinder end (17) attached to a lower end of the cylinder head airtightly; and a piston (9) having a punch head (11) and a piston rod (15); an axial movement restricting member (13, 201) for restricting an axial movement of the piston in the gas cylinder filled with the gas; and a rotational movement restricting members (31; 205, 203) for restricting a rotational movement of the piston in the cylinder body. A stripping force of the stripper device can be obtained by a resilient force generated whenever the gas is compressed by the piston within the gas cylinder for each punching operation. The punch assembly enables plate material of various thicknesses to be punched out without generating stripping miss.

Abstract: A pneumatic ejector comprises a rigid support member having a base portion and an upstanding boss integral with the base portion, and an elastomeric ejection element having a diaphragm portion and a skirt portion surrounding the diaphragm portion and secured to the boss. The support member has an air inlet passage for supplying air under pressure to move the diaphragm away from the boss. The upper end of the upstanding boss is concave and the diaphragm is of complementary shape. The diaphragm has an integral protrusion upstanding from a central region of the diaphragm. Additionally, the diaphragm has an integral protrusion which depends from a central region of the diaphragm and which extends into a through bore in the upstanding boss, the through bore communicating with the air inlet passage in the support member.

Abstract: A device for performing the continuous cutting of materials of any form and nature, provided they are stratified and not flexionally rigid. The device generally comprises: fixed and mobile support surfaces; a mobile cutting shear cooperating with a fixed cutting shear; a fixed blocking unit on the fixed support surface side of the cutting shears; a mobile blocking unit on the mobile support surface side of the cutting shears; an eccentric for driving mobile portions of the device, including the mobile cutting shear, the eccentric being synchronized with the fixed and mobile blocking units; and a link block and slide guide. Non-rigid, stratified materials thereby may be more easily cut in that the invention substantially reduces or eliminates the dragging effect of the material that typically occurs during the cutting process.

Abstract: A hydraulically actuated tire cutter includes a first conveyor belt which loads a tire into a tire cutting position between a fixed plate, a moving plate and a plurality of adjustable bars. Twelve corresponding pairs of gripping jaws project from the fixed and moving plate. The gripping jaws have a saw tooth edge. Each pair of gripping jaws of the fixed and moving plate are in registration with one another to compress the tire until one of the tire's beads essentially touches the other. Twelve blades attached to a blade plate are hydraulically actuated to pass through a passage in the moving plate and the fixed plate to radially cut the tire. After the tire has been cut, a second conveyor belt removes the pieces of tire from the bottom portion of the tire cutter.

Abstract: A first tool assembly includes a punch holder assembly and a circuit board clamp and a second tool assembly includes a die for receiving punches held and driven by the punch holder assembly. A circuit board has holes formed by the punches and is clamped by the clamp to the die. The circuit board and die are aligned to the punch assembly by an alignment pin secured to the punch assembly operated independently of the operation of the punch assembly. The punch assembly and the clamp are independently controlled by actuators with a convex distortion of the punch assembly and clamp during punching to provide an improved clamping and punching action.

Abstract: The present invention relates to a process and a device for producing burr-free workpieces by blanking using a counterblanking tool. The counterblanking tool has an upper tool and a lower tool which include respectively an upper blanking die and a lower blanking die and an upper punch and a lower punch. The counterblanking tool further includes a ram plate which moves one of the upper and lower tools towards the other of the upper and lower tools. The ram plate moves in a continuous ram stroke during which a blanking strip from which a workpiece is to be blanked is clamped between the upper and the lower tool. During the initial portion of the blanking operation, the blanking dies remain in place while a first one of the punches, travels further and a second one of the punches travels back until a limit stop is reached. During this travel the first punch cuts partly into the blanking strip.

Abstract: A precision blanking tool mounted in a press, which may be a transfer press, comprises an upper part with an upper tool support and a lower part with a lower tool support. One hydraulic unit is accommodated in the upper part of the precision blanking tool and another in the lower part. The upper hydraulic unit is inserted with the upper tool support in an interchangeable frame and the lower hydraulic unit with the lower tool support in another frame. The hydraulic units are controlled with pressurized oil by drive means forming a separate unit.

Abstract: A die stamping system includes opposed die members which clamp a metal workpiece to be shaped, cut or pierced after which the die members are moved away from one another and a part is subsequently ejected wherein the ejector is controlled for a selected delay time by a plurality of cylinder assemblies mounted in a manifold so that they are connected to a source of inert gas such as nitrogen under high pressure and to a source of hydraulic pressure. Each cylinder assembly includes a piston associated with and exposed to the nitrogen in the manifold. The cylinder assemblies are connected to a single hydraulic valve which has associated therewith an accumulator and which is operated simultaneously to actuate the cylinders. The hydraulic lines to the cylinders are provided in the manifold.

Abstract: A precision blanking tool mounted in a press, which may be a transfer press, comprises an upper part with an upper tool support and a lower part with a lower tool support. One hydraulic unit is accommodated in the upper part of the precision blanking tool and another in the lower part. The upper hydraulic unit is inserted with the upper tool support in an interchangeable frame and the lower hydraulic unit with the lower tool support in another frame. The hydraulic units are controlled with pressurized oil by drive means forming a separate unit.

Abstract: An improved punch assembly (10) for a punch press comprises a main piston (13) driving a punching tool (11) and an auxiliary piston (17) which can be selectively enabled to cooperate with the main pisto1 (13) in a high force, slow speed mode or disabled to allow the main pisto1 (13) to operate alone in a low force high speed mode. The punch assembly (10) also comprises a pressure transducer (41) and position transducer (25) whose respective outputs are connected to a microprocessor controller for the punch assembly. Operation of the punch press is microprocessor controlled to reduce noise and punch cycle time. A stripper assembly (42-48) is also provided and operates in conjunction with the punching tool (11) under microprocessor control to facilitate tool stripping. The stripper assembly (42-48) can also be used for automatic measuring of work sheet thickness.

Abstract: In a knockout device which is mounted in a press-machine in order to knock out a punched work plate such as a printed board and the likes from punches through a knockout actuation-plate, cylinder chambers as an oil hydraulic knockout cylinder is formed in the upper portion of a base plate fixedly secured to the underside of a slide and an actuation-plate guide hole is formed in the lower portion of the base plate respectively. The cylinder chambers are disposed at the eccentric positions offset toward the periphery of the actuation-plate hole respectively. The knockout actuation-plate provided in the actuation-plate guide hole is adapted to be driven downwardly protrusively by the pistons provided in the cylinder chambers, and to be linearly guided by the peripheral surfaces of the knockout actuation-plate and of the linear guide boss protruded upwardly from the central portion of the knockout actuation-plate.

Abstract: A punch press having a hydraulic actuator for extending and retracting the ram, a stripper sleeve coaxial with and guidably engaging the ram, and a hydraulically operated clamp encircling the stripper sleeve and normally in a release condition guidably engaging the stripper sleeve. Hydraulic fluid pressure supply apparatus is operable to a first condition supplying fluid pressure to the hydraulic ram actuator to move the ram forwardly, and a stripper clamp spring yieldably urges the stripper sleeve forwardly into clamping engagement with the workpiece as the ram is moved forwardly. The hydraulic fluid pressure supply apparatus is operable to a second condition supplying fluid pressure to the hydraulically operated clamp to clamp the stripper sleeve against movement and to also supply fluid pressure to the hydraulic ram actuator to move the ram to a return position while the clamp holds the sleeve against return movement.

Abstract: A punch press having a self-adjusting stripper member is disclosed whereby stripping of the press punching tool from a workpiece is automatically effected attendant to effecting a return stroke of the press actuator. The construction includes a press frame upon which is mounted a double-acting fluid actuator, with the actuator being mounted for limited relative movement with respect to the frame. A piston rod of the actuator carries a punching tool for effecting punching of a workpiece. Notably, a stripper member is operatively connected to the housing of the actuator for movement therewith with respect to the press frame, with the stripper normally positioned to provide a large running clearance relative to the workpiece.

Abstract: A metal working press having a base, a die set located over the base, and coaxial primary and secondary rams movable towards and away from the base to drive the die set through a working stroke and return it to an open condition. The die set includes upper and lower die assemblies and the upper die assembly is connected to the primary ram in such a manner as to prevent axial separation but permit lateral movement of the die set relative to the ram whereby the die set can be moved into and out of the press. The upper die assembly includes two die members which are relatively movable in the axial direction of the ram and the extent of that relative movement is preset by a lost motion mechanism existing in the connection between the primary ram and the upper die assembly and also by engagement between opposed surfaces of the two rams.

Abstract: A punch press which has an X-Y guidance system for moving the workpiece relative to the workstation also includes means for rotating the workpiece on the worktable upon release of the workpiece from the X-Y guidance system. In this fashion, the workpiece may be rotated into a reoriented position and then reclamped in that position within the X-Y guidance system. This press includes a tool mounting means on the head of the press and means for effecting reciprocal motion of the tool mounting means along a vertical axis and rotation of the tool mounting means about that axis. Generally, the press will also include a die assembly in the base which includes at least a portion which is rotatable about the same vertical axis so that the workpiece when gripped therebetween may be freely rotated in a fixed clamped position to effect the desired reorientation.

Abstract: An extrusion press is provided with a butt dislodging apparatus for removal of a billet butt from an extrusion die with the dislodging apparatus including an elongated butt knock-off bar having a free end which is movable within proximity to a butt shear blade and in converging relationship with a shear plane along which the shear blade is movable.

Abstract: A punch and ram assembly for a punch press which clamps a workpiece prior to punching with the same mechanism used to strip the workpiece from the punch as the punch is retracted. The elements of the clamping and stripping mechanism are carried and actuated by the ram and its motion. The invention allows for adjusting the clamping and stripping force.

Abstract: Improved blank-stripping apparatus for rotary die cutters of the type which have a die cutting roll, and an anvil roll for supporting paperboard blanks against a cutting rule on the die cutting roll, includes a rotary-cam-timed valve system pressure-actuating one or more pneumatic piston and cylinder assemblies within or adjacent the cutting rule for ejecting scrap radially from the cutting rule in synchronism with rotation of the die cutting roll; after scrap ejection the valve system vents pressure so that contact with a succeeding paperboard blank and/or spring bias easily retracts the plunger to position for pneumatic actuation in the succeeding cycle of operation.

Abstract: In apparatus for the placement and alignment of punch knives mounted in a knife holder on a punch press, a first swivel arm is pivotally supported at one end on a support for pivotal movement about a vertical axis. A second swivel arm is supported on the other end of the first swivel arm. The second swivel arm is a double-armed parallelogram member pivotally movable about a vertical axis and about horizontal axes at each of the opposite ends. A knife holder is pivotally connected to the parallelogram member at the opposite end from the first swivel arm. Due to the pivotal support of the two swivel arms and the pivotal connection of the knife holder, the knife holder can be moved along horizontal and vertical coordinates. A return member is associated with the second swivel arm for returning it into the horizontal position after the completion of a punching operation.

Abstract: A vertically oriented cylinder has a punch retainer firmly secured to its lower end. The piston within the cylinder has several legs which extend downwardly through and below the retainer. A stripper plate secured to the lower ends of the legs of the piston is biased downwardly by the fluid pressure in the cylinder chamber above the piston which is connected to a fluid pressure source.

Abstract: A punch retainer is formed with a bore in its upper portion for releasably securing a punch therein. The lower portion of the punch retainer is formed as a cylinder for a vertically movable stripper piston. The portion of the cylinder above the piston is connected to a source of gas under pressure so as to bias the piston downwardly. The punch extends downwardly in sealed relation through a central bore in the piston and terminates slightly above the lower end of the piston when the piston is in its lowermost position.

Abstract: A unitary punch and die assembly wherein the stripper spring for the punch comprises a fluid cylinder which communicates with a gas reservoir formed integrally with the punch and die holder and which is adapted to be charged with gas to a predetermined pressure so as to obtain a desired stripping force on the punch. The hold down sleeve on the punch is preferably also actuated by a fluid spring to obtain a preselected clamping force on the stock being punched.

Abstract: A hydraulically actuated ejector mechanism is mounted on a press bed and includes a pair of opposed cams connected to the press slide for vertical displacement therewith. The cams actuate corresponding followers in the form of hydraulic pistons which operate together to hydraulically displace an ejector member during upward movement of the slide following a metalworking operation. The cam contours enable timing the ejector pin displacement with the press slide stroke so as to achieve optimum acceleration and deceleration of the stroke of the ejector pin.

Abstract: A process and device for transforming a single pressure force into separate pressure forces in the processing of material, especially for energizing a punch and a stripper when holes of small dimensions are punched in material which is relatively thick with respect to these holes, wherein the separate pressure forces are directly dependent on each other and on the tensile strength of the material to be worked on.

Abstract: A punch press in which pressure fluid which is introduced into a chamber is used to press a stripper against a workpiece and also to retract a piston which carries a punch. The pressure of the pressure fluid in the chamber is maintained at a substantially constant but selectively adjustable magnitude.

Abstract: Apparatus is disclosed for trimming the flange of a drawn metal container such as a food or beverage container so as to place it in condition for having the lid applied thereto. The apparatus includes a fixed trim punch secured to the base of a press, with a trim die stripper disposed around its upper edge. A trim die is secured to the movable upper bolster of the press for movement therewith. The trim die carries with it a pressure pad which is movable in a downward direction independently of the trim die and movable in an upward direction together with the die. The movement of the pressure pad is such that it will engage a portion of the flange of the container which is received within the trim punch, following which the trim die will continue its downward movement to shear off the excess material along the flange. The shearing motion is downward against the flange so that any burrs or irregularities which might occur on the remainder of the flange after the shearing operation will project downwardly.