Abstract: Forging dies are formed from a plurality of layers stacked together to form an assembly, or laminate. Each respective layer may be cut to form a portion of a die cavity, and the layers may be stacked together such that the cut portions are aligned to form the die cavity. The layers are fastened together to form a first die half and/or a second die half of disclosed forging dies. Each layer may be selectively removable from the die half for maintenance and/or replacement. Disclosed forging dies may be formed of lower grade materials as compared to conventional forging dies, and the number and thickness of layers may be varied to accommodate the specific part geometry of the part being forged. Related methods of making said forging dies and using said forging dies to make parts are also disclosed.

Abstract: Forging dies are formed from a plurality of layers stacked together to form an assembly, or laminate. Each respective layer may be cut to form a portion of a die cavity, and the layers may be stacked together such that the cut portions are aligned to form the die cavity. The layers are fastened together to form a first die half and/or a second die half of disclosed forging dies. Each layer may be selectively removable from the die half for maintenance and/or replacement. Disclosed forging dies may be formed of lower grade materials as compared to conventional forging dies, and the number and thickness of layers may be varied to accommodate the specific part geometry of the part being forged. Related methods of making said forging dies and using said forging dies to make parts are also disclosed.

Abstract: To place an insert cut out of film with no gaps in a cavity formed in a foil, after placing the foil on a supporting substrate, the cavity is punched into the foil by means of a tubular cutting punch comprising an inner pusher with a cutting edge in the required shaped of the cavity and the insert, so that the edge goes through the thickness of the foil and cuts a slug out of it; the punch is lifted with the slug held inside the punch, without moving the foil, the film is brought between the foil and the edge of the punch, the punch is lowered once again so as to cut the insert out of the film and then push the insert cut in that way in the cavity with a pusher, and the punch and the pusher are removed, with the insert held in place in the cavity.

Abstract: A guided keeper assembly for metal forming dies includes a base having a mounting face and a fastener aperture to mount the base to an associated die shoe, as well as a central guide aperture. A guide pin having a central portion is closely received in the central guide aperture for precisely guiding reciprocal motion between the die pad and the die shoe. The guide pin has an enlarged head at one end which abuts the base to positively limit travel between the die shoe and the die pad, and a shoulder at an opposite end with an alignment mechanism that precisely locates the guide pin on the die pad. A fastener extends through the fastener aperture in the base to securely connect the same with the die shoe. Another fastener securely connects the second end of the guide pin with the die pad.

Abstract: A multiple punch and die assembly adapted to a punch press for carrying out a punching or forming operation comprises a punch assembly for holding a plurality of selectively operable punches that selectively engage a workpiece. The punch assembly has a punch carrier for reciprocal motion within a punch guide and a striker body engaging the punch carrier, said striker body being selectively, toollessly connectable to the punch carrier while permitting relative rotation of the striker body and punch carrier to select a punch for engagement by the striker. A detent means releasably positions the striker body in one of a plurality of operating positions, at which a punch is positioned for being struck selectively by the ram via the striker body such that one punch is driven to an operating position when at least one other punch is inactive, the inactive punches engageable by a lock plate.

Abstract: A punching tool for green sheets or similar sheet-like work-pieces having a support plate with punched holes (7), and a holding-down plate disposed above the support plate and containing stripper openings (24). Operative portions (23) of dies (8) extend through the stripper openings (24) and are guided therein. The operative portions (23) are formed in graduated form with a punching portion (26) of reduced diameter. Each punching portion (26) has a length that is less than the length of the stripper opening (24), and is located entirely in the stripper opening (24) when the die (8) is at its top dead center. A part (25) of the operative portion (23) protrudes into the stripper opening (24) to guide the die (8). The punching portion (26) is only approximately as long as required for the punching stroke of the die (8). The slight length of the punching portion (26) makes possible an especially slender punching portion, and thus the creation of especially small punched holes.

Abstract: A one-piece stripper retainer for plastic cup shaped strippers with a universal snap-in design that can be used with both older style and newer style punch retainers. The stripper retainer incorporates an anti-rotation heel with a snug fit around a portion of the punch retainer body and clamps to the punch itself. In a second version, the stripper retainer also clamps to the punch itself but lacks the heel. In a third version, the stripper retainer bolts to the punch retainer with a separate threaded screw. In all three versions, the plastic stripper is locked in place by the snap-in feature without any additional clamping force.

Abstract: A pressing method by which through holes are formed using a punch in a target plate material having a first face and an opposite second face. When the target plate material is punched with the punch from the second face in such an orientation that the first face of the target plate material is in contact with an elastic base, depressed portions are formed. The depressed portions are curved toward a direction in which the through holes are punched to sink downward in the form of funnel as they approach peripheries of the through holes, and are located at peripheral portions around the through holes that are formed in the target plate material in such a manner that the peripheral portions are pushed in toward a deeper side in a thickness direction of the base against an elastic force of the base and are deformed.

Abstract: A puncher having a double cutter linkage structure includes a driving shaft, a driving plate, a front linking rod, a rear linking rod, a front cutter seat, a rear cutter seat, a front cutter, a rear cutter, and a positioning seat. The driving plate is fixed to the driving shaft which has two ends connected to one end of the front linking rod and one end of the rear linking rod, respectively. The front linking rod is pivotally connected to the front cutter seat which is fixed to the front cutter. The rear linking rod has an curved arm at the other end to be connected to the rear cutter seat which is fixed to the rear cutter. The positioning seat is in a reverse U shape and has a front plate and a rear plate at respective sides.

Abstract: A method and cutting device makes incisions in an elongated food product, like a hot dog or sausage, to form a pattern or character after the product is cooked. One form of the cutter includes a hinged housing into which the food product is positioned. The housing includes blades that contact and cut the food product as the housing is closed. Another form of the cutter includes a wheeled cutter and a rack. The wheeled cutter includes gear teeth that permit the rack to be drawn under the wheel as the wheel engages gear openings formed in the rack as the wheel rotates. A food product positioned on the rack is cut by blades on the wheel as the rack travels under the wheel.

Abstract: A precision punch and die device for punching holes in a ceramic substrate and method of assembling the device. The device comprises a punch which moves relative to a substrate for punching a hole in the substrate and a die assembly including one or more precision die plates and support plates for guiding a punch and punching a substrate.

Abstract: Move, deformation, or damages of a green sheet can be securely prevented by improvement of the material and shape of a green sheet retainer 40 affixed to a punching tool 30 provided with a cutter section 32 for punching a via hole on a ceramic green sheet 20. The sheet retainer 40 of the present invention is composed of an elastic material with hardness between 50 to 60 degrees, and comprises: a support portion 46 disposed on one end in the axial direction with a relatively large outer diameter, thick-walled in the radial direction, and engageable in the punching tool 30; a contact portion 42 disposed on the other end in the axial direction with a relatively small outer diameter, thin-walled in the radial direction, and comes in contact with the green sheet 20; and a housing hole 48 axially extending from the contact portion 42 for housing the cutter section 32.

Abstract: A punch and die tool for cutting a slug from a sheet of material that is retained in the opening of the die and does not adhere to or follow the punch on its upward stroke, and a method for retaining a slug in a die, are disclosed. The die is formed with one or more irregularities or grooves on the edge of the die face so that the slug cut by the operation of the punch and die will have a burr on its edge. The burr causes the slug to lodge in the inside surface of the die and prevents the slug from following the punch on its upward stroke.

Abstract: A punch unit (1) having a punch (2) that is reciprocally driven in a punching operation; and, a die (3) cooperating with the punch (2) in punching a punch hole in a soft metal sheet. A cleaning means scrapes a soft metal sheet's fragment, when the fragment is stuck to the punch (2), off of the punch (2). The cleaning means scrapes the fragment by reciprocally moving the punch (2) Further provided in the unit (1) is a punch drive and control circuit (25). The circuit (25) enables the punch to be (2) to perform lost motion at predetermined time intervals. Lost motion enables the punch (2) to scrape the fragment of the soft metal sheet off a surface of the punch (2). Consequently, the fragment of the soft metal sheet does not remain stuck to the punch (2) in the punching operation.

Abstract: A sleeve-type gas spring for a turret indexing press has an annular piston operably associated with a punch tool to reciprocate therewith and defining in part an annular gas chamber constructed to receive a gas under pressure. As the punch tool and piston are driven to their extended position by a press ram or some such other power device, the volume of the gas chamber decreases thereby increasing the pressure within the gas chamber such that when the ram is retracted, the pressure of the gas acting on the piston displaces the piston and the punch tool to their retracted positions. The force acting to retract the piston and the punch is dependent on the initial pressure of the gas within the gas chamber and the change in volume of the gas chamber as the punch tool and piston are extended.

Abstract: A punch and die tool for cutting a slug from a sheet of material that is retained in the opening of the die and does not adhere to or follow the punch on its upward stroke, and a method for retaining a slug in a die, are disclosed. The die is formed with one or more irregularities or grooves on the edge of the die face so that the slug cut by the operation of the punch and die will have a burr on its edge. The burr causes the slug to lodge in the inside surface of the die and prevents the slug from following the punch on its upward stroke.

Abstract: A punch unit (1) is provided with: a punch (2) reciprocally driven in a punching operation; and, a die (3) cooperating with the punch (2) in punching a punch hole in a soft metal sheet. The unit (1) is provided which a gate (13b), which (13b) serves as a cleaning means for scraping the soft metal sheets fragment having stuck to the punch (2) off the punch (2) when the punch (2) is reciprocally moved. Further provided in the unit (1) is a punch drive and control circuit (25) The circuit (25) enables the punch (2) to perform lost motion at predetermined time intervals. Such lost motion enables the punch (2) to scrape the fragment of the soft metal sheet off a surface of the punch (2). Consequently, the unit (1) is free from a fear that the fragment of the soft metal sheet remains stuck to the punch (2) in the punching operation. (See FIG.

Abstract: A punch assembly is provided with a positive retraction mechanism to remove the punch from the media to be punched, thereby preventing binding of the punch in the media. The punch assembly includes a driving mechanism to provide a driving force on the punch and a positive retraction mechanism disposed to provide a retraction force on the punch operative sequentially following operation of the driving mechanism. The punch assembly, which is of a smaller size and more economical to manufacture, is particularly useful with an imagesetter of a prepress printing system. The punch may be mounted in a cantilever manner to punch the opening as close to the edge of the media as possible without interfering with the laser beam of the imaging assembly. In this maimer, the area of media available for imaging may be maximized and media waste minimized. Additionally, a shaft support mechanism is provided for the shaft upon which the retraction mechanism for each punch is mounted.

Abstract: A die assembly for driving a pierce nut which comprises an annular coining portion provided on the top of a die body, the inner surface of the annular coining portion being continuous with a center aperture of the die body. An annular projection is provided at the upper portion of the center aperture for surely and temporarily holding punched debris in of the die body, near the annular coining portion, the center aperture. It is therefore possible to provide an inexpensive nut-driving die assembly with improved durability, and which can prevent debris, punched by shearing between a pierce nut and a metal panel and remaining at the upper portion of the center aperture, from being lifted up when the metal panel is lifted from the die body, thereby ensuring a continuous driving work.

Abstract: A stripper arrangement for a punch holder which uses an external thread on an end section of the punch holder body to mount either a plastic sleeve press fitted over the external thread or a replaceable steel stripper disc held against the end face of the end section with a steel retainer sleeve threaded onto the external thread. In a first embodiment, a soft tipped set screw secures the steel retainer sleeve. In an alternate embodiment, an O-ring engages the inside of the retainer sleeve to retard unthreading due to vibration, which O-ring also engages the plastic stripper sleeve to augment the friction exerted by the press fit over the external threads.

Abstract: A stamping and forming machine positively prevents slug pulling by stripping the slug off of the end of the punch as the punch is being withdrawn from the die opening after a blanking operation. This is accomplished by providing a die insert support in supporting contact with the die insert having an opening that is identical to the opening in the die insert, but that is rotationally or laterally displaced therefrom by a small amount. As the punch pushes a slug through the opening in the die insert, the slug encounters the displaced opening in the die insert support and is shifted slightly as it is forced into that opening by the punch. As the punch is withdrawn from the die insert opening, the shifted slug cannot return through the opening and is stripped off of the end of the punch.

Abstract: An apparatus and method for slicing food products such as loaves of bread and the like where multiple slices are formed at substantially the same time. A blade cleaning assembly is included for removing slicing debris from band slicing blades after having moved through the product being sliced. Multiple blade continuous cleaning by opposed scraper blades through which each band blade passes achieve the desired cleaning function. The apparatus and method are particularly well-suited for removing slicing debris from loaves of bread which are of the so-called no-fat or low-fat variety.

Abstract: A punch station for punching ceramic green sheets comprises a magnet plate and two flux guide plates to form the flux field within which a coil of wire resides and acts to cause the punching movement of a punch. The magnet plate allows the placement of adjacent punch stations more closely together than is possible when cylindrical magnets are used since the magnetic material lying between the punch being activated and the punches surrounding the activated punch has an additive effect and produces a more dense flux field than achievable with the cylindrical magnets. The flux guide plates concentrate the flux from the magnet plate into a small gap further increasing flux density in the working gap. The magnet plate overcomes the losses inherent with magnets separated by air gaps.

Abstract: A quick change die cutter is provided for permitting interchangeable die elements to be readily inserted and removed without the need for tools. A receiver is provided for carrying the die element which presents a cutting edge thereon, and a lever serves to shift the die element into engagement with the web of sheet material to be cut thereby. A pad of relatively soft material such as synthetic resin is positioned to engage the cutting edge as it passes through and cuts the web, thereby eliminating set-up time necessary to prevent the cutting edge of the die from damage due to excessive vertical travel. The receiver preferably includes a pair of opposed side walls for receiving the die element in the space therebetween, at least one of the side walls including a locking member for inhibiting shifting of the die along the respective side walls and out of alignment with the web to be cut.

Abstract: A punch press die (D) is used to construct rotor laminations (RL) and stator laminations (SL) for a dynamoelectric machine (1). A cavity (17) is formed in the die for a punch (15) to travel through and stamp a slot (5) in a strip (3) of material. Opposing side walls (21A, 21B) of the die form the cavity and each side wall has a longitudinal groove (25A, 25B). Each groove is inclined across the face of the wall from one end to the other, the grooves being inclined in opposite directions. In the preferred embodiment, the grooves are oriented about the center-lines of their respective side walls and have a co-planar point (MP) mid-way along their length. Material clinging to the striking face (24) of the punch (115) as it moves through the cavity tends to expand into the grooves and is drawn off from the face of the punch.

Abstract: A multitool punch holder (12) having a head member (26) coupled to a punch press ram (16) as the press upper turret plate (22) rotates to bring the punch holder (12) into alignment with the ram (16). The punch holder (12) includes a rotary tool carrier (56) carrying a series of punches (80), each able to be selectively rotated into alignment beneath a striker rod (100) slidably mounted in a non rotating body member (30). Stroking of the ram (16) causes an engagement feature (108) to engage the striker rod (100) when the head member (26) telescopes into the body member (30) after axial movement of the holder (12) is arrested by contact with the workpiece (120). The striker rod (100) is then driven to force the coupled individual punch (80) into the workpiece (120). The striker rod (100) is urged to a raised position by an encircling stripper spring (110).

Abstract: A method and device are provided for separating trimming losses from a sheet having a plurality of products formed thereon with star-shaped scraps between the products. In one embodiment, the sheet is placed on a sheet supporting plate. The sheet is positioned between a blanking plate and a plurality of pushing rods fixed to a mounting plate. Each of the pushing rods has a piercing pin extending from the free end thereof for penetrating into a corresponding star-shaped scrap. The blanking plate has through holes formed therein which correspond to the pushing rods and star-shaped scraps such that the pushing rod passes through a corresponding through hole. The inner diameter of each through hole is smaller than the outer size or greatest dimension of the star-shaped scrap. When the star-shaped scrap is pushed through the through hole by the pushing rod, it deforms and passes through the through hole.

Abstract: A die assembly for mounting in a die press operates to punch a row of holes in a stack of paper sheets in response to a single press stroke. The die assembly comprises a stationary lower die block having a row of die holes therethrough, one or more lubricated stationary guide plates each having a row of guide holes therethrough and located above and spaced from the die block by a separator plate so as to define a stack-receiving slot, a reciprocably movable punch retainer assembly located above the guide plate and a row of elongated, downwardly-depending punches connected at their head ends to the punch retainer assembly which extend through and slidably engage the guide holes. When the press closes, the cutting ends of the punches move through the stack-receiving slot and through a stack of sheets therein into sliding engagement with the die holes. When the press opens, the punches are withdrawn clear of the stack-receiving slot.

Abstract: A block stripper and stroke limiting is described for use in wood splitters in which a blade is driven by toward and away from a stationary wood support surface. The attachment includes a stop that can be selectively positioned along the splitter frame to abut operatively with the blade as it is withdrawn from its fully extended position. A new blade starting position may be determined by selectively positioning the stop along the frame and by securing the stop to engage and resist retraction of the blade beyond the newly selected starting position. A wood stripping device is mounted to the stop and is adjustable therewith to selected positions along the splitter frame. The stripper will operate at any position along the stroke length of the cylinder to strip bound, partially-split wood from the splitting blade as it is retracted to the selected starting position.

Abstract: To permit punching of very small holes from a strip of sheet metal, for example to form a sequence of holes at the margin thereof, or to obtain small punched blanks, having diameters of a few millimeters, for example 1-2 mm or even less, and prevent adhesion of the punched blanks to a reciprocating punch plunger (1), the punch die (4) is formed with a shallow groove (8) in the wall of the opening (5) of a die, the groove extending either spirally or axially for the depth of penetration or stroke of the punch plunger. Upon withdrawal of the plunger, a small projection or nose which will have formed in the region of the groove will wedge or jam therein, thus preventing upward travel of the blank with the withdrawing reciprocating tool. Preferably, the opening is slightly conical, with a cone angle of, for example, about 1/2.degree. with respect to the axis (12) of the bore (5); a suitable angle of inclination for a spiral groove is, for example, 12.degree.

Abstract: The die of a punch press is provided with at least one inwardly-extending protrusion elongated in the direction of travel of the punch and positioned to encounter and grip the edge of a punched slug of workpiece material during the punching step and to restrain the slug from following the punch during the retraction step of the punch.

Abstract: An improved cutting machine including a thin, elongated cutting blade and a guide block with an opening which is shaped to conform to the cross-sectional shape of the elongated cutting blade. The guide block with the defined opening both guides the elongated cutting blade and maintains it clean.

Abstract: Mechanism for locating preformed, open-mouthed cans for the trimming of their flanges, featuring spring-hinged grooved, flange-holding jaws releasably locating cans for the advancing punch and serving to strip the trim from the punch on its return stroke.

Abstract: There is herein described a blanking press in which a punch is moved upwardly under pressure to engage a sheet workpiece and pass through a punch-conforming die plate aperture, the press housing including a product retrieving and operator-viewing opening in the upper end thereof to allow an operator to directly view the alignment of the workpiece relative to the die opening and the operation of the press by looking in a downward direction.

Abstract: The piercing unit of the present invention is a low-cost device having relatively few parts. The unit comprises a C-frame of cast iron. A hole is drilled from the top of the unit, through the top leg and part way into the lower leg. The bottom of the hole forms a seat for the lower end of the die sleeve. A punch holder slide is machined from tool steel for close-tolerance fit within the hole in the top leg. The slide has an opening extending inwardly from its lower end to receive the punch, and a threaded opening extending inwardly from its upper end to receive a stripper bolt. The punch holder slide abuts a shoulder adjacent to the inner end of the stripper bolt, and thus is backed up in its punching stroke. The punch abuts the threaded inner end of the stripper bolt and is thereby backed up in its punching stroke. Dog point set screws hold the punch assembled with the punch holder slide as the punch is being stripped from the steel it has just pierced.

Abstract: There is disclosed an apparatus for punching packages of paper money and other securities for defacing them, the apparatus preventing the sticking together of individual sheets of said packages in order to permit a subsequent mechanical counting of the punched sheets of the package.

Abstract: A press is disclosed having an upper tool which is vertically reciprocated by means of a ram and which is arranged to cooperate with a stationary lower tool in performing work on a workpiece positioned therebetween. The press is characterized by improved apparatus for detachably mounting the upper and lower tools, as well as by an improved apparatus for limiting upward movement of the workpiece during upward retraction of the upper tool.

Abstract: A work table and hold-down assembly for adapting a power hand saw such as a saber saw or jig saw for bench use. The assembly includes a work table which is clamped to the base of the saw, the work table having an opening through which the saw blade passes. A work hold-down member is held in adjustably spaced relation to the work table by a clamping swivel stem rotatably mounted in the opening of the work table, thereby permitting the work-holding member to be moved laterally with respect to the work. A safety shield carried by the work-holding member is in spaced, surrounding relation to the saw blade.

Abstract: A punch guide and stripper is molded from plastics material to the exact configuration of the punch and is supported and reinforced by a rigid punch receiving member to engage a workpiece around the slug to be punched therefrom and strip the punch from the workpiece without bulging or damaging the workpiece. The plastics material is molded in situ around the active end or nose of the punch within a rigid metal punch guide at the punch exiting end of the guide to a height or thickness sufficiently to guide and laterally support the nose of the punch throughout its stroke. The surrounding rigid punch guide prevents lateral displacement or distortion of the plastics material and terminates either flush with or just short of the workpiece engaging face of the plastics material. The active end of the punch is of smaller diameter than the main body of the punch and may have any desired configuration with a shoulder extending from the reduced section to the full diameter of the punch.

Abstract: A die holder for punch presses for placement in a die set is described. It consists of a die element retained by a frame member supported on pads secured to a die block. A sliding support between the die element and the die block is provided, reinforcing the die upon impact of the punch. The frame member is undercut, permitting saving of material and distribution of mass at points of maximum stress.

Abstract: A punch apparatus is provided to punch holes in an article by the use of a die punch. The die punch is forced through the article to be punched. A cleaning device is extended into engagement with the die punch when the die punch is in a position penetrating the article. This enables a cleaning of the die punch. The cleaning device is then retracted so that the article can be detached from said die punch.

Abstract: A transparent sleeve made of impact-resistant plastic is fitted removably around the angularly spaced stripper fingers of a punch press and encloses the spaces between the fingers to prevent parts of the punch from flying out through such spaces in the event the punch should break.

Abstract: A multiple paper punch has a base. A substantially vertical stripper plate is mounted on the base and has a plurality of openings for punch pins. A punch pin is mounted in each opening with each punch pin having a cam follower head. A substantially vertical die plate is mounted on the base adjacent the stripper plate and has openings in line with the openings in the stripper plate. The stripper plate and the die plate form a guide for the vertical entry of a sheet to be punched. An operating bar is mounted on a substantially horizontal pivot and has a depending cam portion adapted to engage the head of each punch pin. The punch pins and operating bar are biased to the inactive position by resilient means.

Abstract: The die of a punching tool has a body of relatively soft and elastically deformable material with a through hole in extension of a through hole of the die but of smaller section, corresponding to that of a punch which passes through the die with a clearance, so that as the punch is withdrawn waste pieces are retained in the body by elastic deformation.

Abstract: A punch press for producing duplicate piece parts from workpiece blanks includes a C-shaped frame supporting an actuator operable to reciprocate a movable tool element toward and away from a fixed tool element to punch holes in an intervening workpiece blank. The latter is clamped to a carriage for movement between the tool elements within a punching area and the carriage is supported on a movable bed which, in turn, is supported on a worktable mounted separately of the press frame. The bed is slidably mounted for movement in an x direction while the carriage is slidably mounted on the bed for movement in a y direction thereby enabling x, y movement of the blank to position it in the punching area. Located on the table adjacent the punching area is a duplicating area within which a first piece part is clamped to the table in a predetermined position with respect to the fixed tool element.