Abstract: A punch press has a punch support and die support which are rotatable about a common vertical axis, and a drive mechanism for rotating and effecting the reorientation of the tooling relative to the X and Y axes of the punch press. In this fashion, rotation of the tooling will enable reorientation of a single cutting surface, and location of various of the distinctly contoured cutting surfaces, at the desired cutting position to effect cutouts of different contour or angular orientation in a workpiece relative to the X and Y axes. The punch has a cutting portion which is of a cross section providing at least two cutting surfaces of different contours with at least at least two arcuate cutting surfaces. In accordance with one embodiment, the punch is desirably of elongated cross section with a length L along its elongated axis and a width W in its transverse axis which is less than 1/2 L.

Abstract: A pneumatically actuated hole punch which employs a ball and die punching arrangement in which the ball is free floating and the punching impact is between the ball and the plunger rather than between the ball and the die. The plunger incorporates a concave surface to correctly position the ball relative to the die upon cutting of the desired opening.

Abstract: Resharpenable cemented carbide cutting tools which have been treated by ion implantation, as well as a method of making and using these tools, are described. Applicants have found that the benefits of the initial ion implantation on cemented carbide tool life will remain after sharpening of the tool.

Abstract: An air ejector system for use in a horizontal or vertical stamping press which reciprocates the moving member of a die set to produce an annular product. Air is introduced through a central punch for shedding and ejecting a slug. Air is also introduced through an annular knockout for shedding and ejecting a coaxially produced product. A resilient member retains the knockout in a position rearwardly of the punch and button die during the forward punching stroke. Valving sequentially introduces the air through the punch and knockout at the appropriate points in the reciprocating stamping cycle.

Abstract: In a power tool, particular a revolving cutting press, a punch holder and a stripper shoe are provided with openings for a punch and a stripper, whereas a matrix shoe which carries a matrix is located in a lower revolving plate also in a recess open in direction of withdrawal or insertion of the matrix, and these tools are secured from their unintentional withdrawal by elements which are releasable by the machine so that withdrawal and insertion of the complete tool sets can be performed without manual operations.

Abstract: A master die set and unit die system for use with a punch press, the master die set adapted to receive, align, clamp and release unit dies of standard dimensions so that unit dies may be quickly changed in the master die set while the master die set is operably installed in a punch press. The upper shoe of the master die set includes a sliding dovetail to align and clamp a punch holder plate of standard dimensions, the sliding dovetail operated by a single clamping screw. The opposed bottom shoe of the master die set includes a recessed pocket and clamps to align and clamp a unit die blank of standard dimensions in registry with the punch holder plate. The master die set is attached to the punch press by bearings so that the entire die set can rotate with respect to the punch press to cut saw teeth having the same tooth length, but different gullet depths, with the same die.

Abstract: In the art of cutting dies for layers of deformable stock material such as plastic, the improved cutting means combination and method which includes a razor blade cutting edge mounted on a punch press opposite a supporting cutting surface having a slot matching the shape of the razor blade cutting edge. The cutting edge is applied with appropriate pressure to the stack of material in the area of relief provided by the slot so that a clean efficient cut is effected through the stack of material. Preferably the razor blade cutting edge is a single blade so that problems such as material hang ups caused by incomplete cutting are minimized and/or completely eliminated.

Abstract: The punch retainer mounted on a die shoe has a body with a backing plate fastened to the top face thereof. The body is formed with a first bore for retaining a punch, the inner end of which abuts the backing plate. A first dowel projecting from the mounting face of the die shoe extends into the backing plate in axial alignment with the central axis of the first bore. Second and third bores in the body register with second and third holes in the backing plate. Tubular dowels engage in the registering bores and holes to align the backing plate on the body. The retainer is mounted on a die shoe by holding screws which extend through the tubular dowels and thread into the die shoe. The backing plate is aligned on the die shoe by either a separate fourth dowel in the backing plate spaced remotely from the first dowel or by extending one of the tubular dowels beyond the backing plate for engagement with a registering opening in the die shoe.

Abstract: An improved apparatus for cutting out discs from a sheet of cotton or other flexible material employs a reciprocating punch assembly having a punch whose stem is held in a housing that aligns the punch with an aperture in a die. The punch carries a protruding spherical segment that presses the interposed sheet material against the rim of the aperture in the die. To adjust for misalignment of the punch with the die aperture, the punch is resiliently supported in the housing in a manner permitting the punch sufficient movement to enable its spherical segment to enter the die aperture and force the flexible material against the entire circumference of that aperture in one stroke of the punch assembly.

Abstract: A set of platens locatable as for instance on a die shoe and a slide die each contain a recess sized and shaped so as to partially receive one die of a set of dies. The platens further contain a wall which extends between the outer periphery of the platen and the recess with a hole extending through the wall and opening into the recess. The dies have a corresponding hole positioned in the dies so as to align with the holes in the walls when the dies are appropriately located in the recesses in the respective platens. A fastener has a shank with a handle having cam surfaces thereon located on one end of the shank and a flared head on the other end of the shank. A sleeve having a tapered tip fits on the shank between the cam and the tapered head with an expandable bushing then positioned between the sleeve and the head. Movement of the sleeve toward the head expands the bushing so as to lock the fastener in the aligned holes between the walls and the dies.

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: A machine tool for working sheet metal is described. The principal characteristic of the present invention lies in the fact that it comprises electronic apparatus operable to control the adjustment of the stroke of a striker which can strike a pin supporting a tool for punching or nibbling a metal sheet.

Abstract: A miniature pneumatic punch for a strip of photographic print paper, to punch a hole between adjacent photographs at the exposure stage of the printing process. The punch comprises a cylinder body having a chamber and a piston seated within to be pneumatically driven between upper and lower limits in the chamber. For this purpose, actuation and retraction air inlet ports are provided through the wall of the chamber. Fluid communication within the cylinder chamber between the ports is prevented by the piston. An elongated guide of constant cross-section is secured centrally to the piston on the side thereof exposed to the air from the retraction air inlet port. A passageway is provided through the cylinder body below the chamber, the passageway being of constant crosssectional and flushly receiving the guide for sliding movement therein. An elongated punch of the same or less crosssection dimension than the guide is centrally secured to the free end of the guide.

Abstract: A turret punch press is provided with a rotatable upper turret holding a number of upper tools and a rotatable lower turret holding a number of lower tools. One pair or more of the upper and lower tools are so arranged as to be rotatable in the upper and lower turrets, respectively, and are connected and disconnected with a drive.

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: A tool for punching relatively thick paper stacks, comprises a cylindrical, hollow punch with a cutting edge on its front outer edge. Processing takes place in the manner of a punching operation against a bearing surface, which has a hole corresponding to tool with a counterpunch arranged centrally therein. A blade is arranged in the resulting annular gap in order to separate punching waste which has been pressed into said annular gap and in order to permit the removal thereof.

Abstract: Apparatus for cutting printing plates, comprises a cutting press with relatively movable platens one of which carries a form cutting tool for severing or partially severing from a processed sheet of flexible material a central image-bearing portion for use as a printing plate. Retractable registration and holding means engage registration targets on said sheet so as to locate the sheet in registry with the form cutting tool and to hold the sheet in position at least until it is held by the pressure of the cutting tool thereon.

Abstract: A practice of severing a length of chain wherein the chain is supported and an interior link of the chain is severed at the link portion which passes through the central opening of an immediately adjacent link.

Abstract: The blanking tool has a pair of plates, one of which supports a punch and the other has a mating die cavity. The two plates are resiliently joined together to permit limited reciprocal movement. One of the two joined plates has provisions for mounting to a platen of a punch press.

Abstract: For use in combination with a die plate having through bores, matrix means for mounting to the die plate including die means for cooperation with tools of a die assembly to function therewith to work material fed therebetween, one end of said matrix means being constituted by a matrix segment the external dimension of which is greater than that of the through bores in the die plate, the matrix means also including a mounting segment dimensioned for a press fit within a through bore of the die plate, providing thereby that the outer peripheral portion of the matrix segment will seat on the die plate. The matrix means has a passage therethrough at least a defined portion of the length of which within the matrix segment has a uniform cross sectional area. The operating surface portion of said matrix means, provided by said matrix segment, positions outermost from the die plate to which it is applied to define a limited matrix surface displaced from the die plate.

Abstract: A novel punch for employment in a machine utilizing a punch ring containing a number of spaced, radially-arrayed holes in which the punches are secured, with the punch ring being used in cooperative relation with a die ring employing a number of dies corresponding to the number of punches used. During synchronous rotation of the punch ring and the die ring, each punch interacts each time with a corresponding die, with this arrangement making it possible for the edges of a continuous roll of paper or the like destined to be used in a computer or other type of business machine to be rapidly and effectively punched.

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: An adjustable die assembly is shown for forming a template having a plurality of holes each having a medial lug portion. The die assembly is mounted in a base member that has a graduated dial plate. The template is first provided with a plurality of starter holes. The die has a post surrounded by an annular recess except for a medial lug portion. The die is first set at a particular angular relationship to the dial plate. A template hole to be processed is fitted over the post. The base member includes an adjustable cross bar for alignment of the template with respect to a datum plane. A punch is then assembled on the die post and passed through the template for forming the holes with a medial lug portion in various angular positions.

Abstract: A punch and die assembly specifically adapted for use as a parting tool is disclosed. The punch has a working tip of rectangular cross section formed with a radius curved convex shear bottom. The punch mates with the die such that the punch side wall to die side wall clearance is maintained or increased at the corners.

Abstract: A hinged carton integrally molded of polystyrene foam and adapted to be locked shut by a flap extending upwardly from the bottom part of the carton inside a side wall of the carton cover and carrying one or more prongs so that the latter will be biased outwardly to snap into a corresponding number of holes provided in said cover side wall, the ruggedness of said carton being materially enhanced over similar cartons of the prior art by the local beefing up of said cover side wall in the immediate areas bordering said holes incidental to the functioning of a novel method of and apparatus for manufacturing said carton. Said apparatus is embodied optionally in a forming tool or in a form-and-trim tool and embraces relatively vertically reciprocable carton shaping matched-molds operating on a heated thermo-plastic web of polystyrene foam to produce one or more entire cartons with each reciprocation.

Abstract: During passage of an I-beam through a punching press for punching holes vertically through its web, holes are also punched through its flanges by horizontally acting punches of the present invention. Four C-shaped punching heads are provided for the flanges. To permit punching closely adjacent holes, two punches are powered by a single hydraulic cylinder, unless one is deactivated. A joint gauge screw precisely adjusts gauge (the spacing between the two punches), and may be raised or lowered for centering as to web. Before each flange punching operation, the web is pressed firmly against a fixed block level with the web die. The piston of the hydraulic cylinder is of such large diameter that the varying positions of the punches will lie within the projected periphery of the piston rod.

Abstract: A cutter assembly is disclosed for accurately profiling the free end of multi-conductor flat flexible cable for termination by known electrical connectors. The assembly includes a pair of fixed, parallel, spaced side shears and a transverse end shear. A cable is held in the assembly between a fluted shear plate and a spring biased pressure plate. The cutter assembly is actuated by conventional press means.

Abstract: The present invention relates to a self-centering device for blanking out or punching holes through relatively thin gauge materials and particularly elastomeric materials such as rubber or plastic.

Abstract: A tool assembly in which the tool retainers are provided with spring loaded plungers which snap into place in detents provided in the tools and are then locked in the detents by set screws engaging the shanks of the plungers. This prevents inadvertent displacement of the tools, particularly punches, from their retainers, especially displacement due to jarring or vibration during manufacturing of the tool assembly. The retainers are attached to their respective shoes by bolts having tool engageable sockets in both their leading ends and their heads. This facilitates manufacture of the tool assemblies while permitting replacement of the tool retainers without removing the shoes from the press in which they are mounted. Additionally, a stripper plate may be mounted by means of bolts having tool engageable sockets in either end to permit the plate to be removed from the press without removing the shoe to which the stripper plate is attached.

Abstract: A stamping and cutting die-set having exchangeable die plates consisting of an upper and a lower part connected by means of guides and serving to secure at least one cutting die locked by means of at least one clamping system.Two centering pins (3) with conical tips (3a) pointing to the interior of the die-set are located no less than two each in the upper and lower parts (11,1) so as to be displaceable inside boreholes (13a) extending normally to the plane of the plates, these pins each being loaded by strong springs (5), and the tips (3a) of these pins projecting towards the inside of the die-set when the die-plates (2,21) are removed. The die-plates are provided with correspondingly designed hollowconical recesses (4) which are entered by tips (3a) of centering pins (3), which are pre-loaded, after die plates (2,21) are locked by means of clamping system (6,7).

Abstract: A blanking die comprises a relatively thin die plate having a cutout into which the punch of the press, upon blanking operation, forces the material to be cut to form the required part blank. A holder of sturdy construction is provided onto which the thin die plate is removably mounted. Slidably positioned within the holder is a reciprocating support block which, upon blanking operation, underlies the thin die plate in order to reinforce it against the impact of the punch. After the blanking cycle, the support block is moved either to eject the part blank or to allow the latter to fall through an opening in the holder.

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 punching machine for use in punching holes in the sides of articles incorporating two C-shaped assemblies forming punching tool supports and guided within the machine in such a way that they can be displaced and moved away from each other. Means are provided for placing the assemblies, on the one hand, in a working position, in which the position of a punch tool on one of the tool supports is maintained at a predetermined distance from a guide plane coinciding with a guiding surface on the article to be drilled, and in which the spacing of the tool supports is maintained at a predetermined value, and on the other hand, in a position for rotation of the article to be drilled, such that each assembly is displaced in relation to its working position in the sense of an increase in the distance separating the two assemblies.

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.

Abstract: This disclosure relates to a punching apparatus for perforating sheet materials, and comprises a multiple tool holding unit mounted on a press table beneath a vertically movable press ram. The tool holding unit includes a horizontally extending upper arm having a horizontally swingably journalled holding member disposed at the free end thereof. The punch holding member is provided with a plurality of punch holding bores which may be selectively positioned beneath the press ram whereby holes of different diameter may be punched in the sheet material. The punching unit further includes a lower arm disposed beneath the horizontally extending upper arm, and includes a die holding bore having the configuration of two half circles connected with each other by two parallel lines running in the same horizontal direction as the lower arm and is further provided with a horizontally movable clamping member.

Abstract: A die set includes a first die holder having a first die detachably fixed thereto, and a second die holder having a second die detachably fixed thereto. The first die holder is slidable towards and away from the second die holder. The second die is supported by means of plural supports movable up and down on the second die holder, and is removable out of the supports. A drive means mounted in the second die holder enables simultaneous up and down movement of the supports.

Abstract: Hole punching apparatus for punching registration holes for graphic arts sheets, steps, etc. including table support means (e.g., a graphic artist's light table) having a grooved guide channel for registration pins along one side and a second similar grooved guide channel perpendicular to the first and positioned intermediate the ends of the first, a single hole punching means having a depressable position-retaining means for sheet material being punched and whose punch axis is aligned at the intersection of the two grooved guide channels, and three registration pin assemblies, one each of which assemblies is separately slideably positioned in one of the three legs of the intersecting grooved guide channel. The registration pin assemblies being adapted to be locked in a fixed position.

Abstract: Profile press and precision cutting apparatus having a pressure multiplier comprising a cutting die loosely supported by a base plate, the cutting die being held in parallelism with the cutting tool by a guide means fixed to the piston rod, which means assures a torsion free guidance of said piston rod.