Showing papers on "Stamping published in 1976"

Stamping and cutting die-set with interchangeable die-plates

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).

Process for manufacturing monobloc wheels by die stamping and rotary extrusion

Abstract: A process for manufacturing monobloc wheels for vehicles from a roughly sed article having the shape of a cylindrical disc. A sequence of die stamping and rotary extrusion operations is carried out on the disc to arrive at the definitive shape, which does not require more than a few finishing operations by mechanical machining. These wheels which may in particular be made of light, aluminum-based alloys, are especially suitable for large tanker vehicles equipped with tubeless tires.

Separating packaging vessels deep drawn in continuous film - rows sheared first, transferred to stamping unit and packed

Abstract: The separating device for the vessels formed in a continuous run of film by a press for deep drawing packagings, has a knife extending across the full width of the sheet of film, so as to cut off a row of vessels; together with a feeder which progresses the sheared-off row through a transverse guide to a shear for cutting out the separate vessels. In the transverse guide a centralising tool lines up the strip for the shear, which works with a pinking tool for punching out a wedge-shaped section from each end of the cutting line, in the two edges of the strip. Expensive tools subject to heavy wear are dispensed with, no pinking cut or only a very slight one being necessary. The packages are cut out absolutely centrally and changeover to a different rim format is simple.

C-ring holder

Abstract: A miniature electrical connector comprising an insulative body having spaced, parallel connector pins extending therethrough and held in place by a combination of abutment surfaces on the pins and block, and C-rings on the pins. In assembling the connector, the C-rings are formed as part of a metal stamping, and are urged as a unit onto corresponding ones of the pins extending through the body. The C-rings are released from the stamping by bending the latter along suitably formed fracture lines.

Apertured strip rolling system - uses sequential roll pairs to provide stamped or coated strip with intermediate heat treatment

Abstract: A strip with holes in it is manufactured such that the coll or hot pre-rolled strips is fed between drill type rollers and/or swageing rollers and/or stretching rolls running at similar or differing input speeds and with similar or different surface types. As a result of passage through these various rolls defined stamping or holing or coating of the strip ensues. Between passage of the strip through the various processing rollers, a stress relieving heat treatment is administered. All the processing rollers run concentrically, eccentrically or in some relation to one another.

Stamping or nibbling machine having a workpiece feed operable in accordance with the weight and center of gravity of the workpiece

Abstract: A stamping or nibbling machine, comprises a workpiece support or means for engaging the workpiece at a spaced location from a punch which reciprocates upwardly and downwardly in respect to a die in order to effect the stamping or nibbling of the workpiece. The support is mounted on a transverse bar which is pivotable about a transverse guide and the guide is carried on a carriage which is pivotable about a longitudinal guide. The workpiece is fed by holding the bar and the carriage against pivotal movement and driving them in the respective longitudinal direction when the punch is lifted off the workpiece. The rate of this feed may be controlled in timed relationship to the movement of the punch so that the feed takes place when the punch is off the workpiece and in a speed of feed which is determined in accordance with the torque acting on the transverse bar and the carriage when they are released for pivotal movement and sensed by associated torque meters. In addition, the feeding control is also carried out in dependence upon the weight of the workpiece as measured, for example, by a measuring bolt at the location of the die. The stamping stroke of the punch can be released through a time-delay device which is controllable by the measuring device for determining the weight of the plate. The torque meters effect a measurement of the center of gravity of the workpiece at any time during its positioning in respect to the punch and the die.

Convolute foam package

Abstract: A convolute package of flexible foam sheet material which is highly compact to facilitate shipment and storage, and which has substantially uniform layer to layer compression within predetermined limits consistent with the desired compression of the overall package and without detrimental over-compression of any layers. Further, the material in the package is dimensionally stable upon the unwinding of the package to permit the immediate use thereof, such as die stamping components of predetermined size therefrom.

Stamping-out machine for textiles, paper, plastics, etc. - having strip steel stamping cutters and soft elastic counter pressure plate

Abstract: In a stamping out machine, esp. for use with textiles, paper, cardboard, rubber, rubber-like matls. or plastics, by means of strip steel stamping cutters working in conjuction with a counter pressure plate, this plate consists of a soft elastic matl. at least in the region of the working surface, and more esp. consists of a soft elastic layer supported on a support plate of high strength and stiffness. The arrangement reduces the damage caused to the counter pressure plate by the stamping cutter and therefore increases the length of life of the plate.

Device for stamping soil into groups of growth pots

Abstract: A device for stamping soil into groups of growth pots positioned in abutting relationship on a table or the like, which device comprises a roller means provided with longitudinally and circumferentially evenly spaced stamping pegs, the spacing between each peg exactly corresponding to the spacing between the pots on the table, said roller means rotatably supported in a holder and said holder provided with a rodlike handle means.

Automatic stamping and bending machines for mfg small parts - using roller chain and chain wheels to actuate tools

Abstract: In a driving unit for automatic stamping and bending machines, an endless roller chain is employed to drive the individual bending and stamping tools via chain wheels. The various tools are pref. located on one assembly plate and are independent of a pitch circle, i.e. the tools do not need to be located on a common pitch dia. Both sides of the chain are pref. employed to transmit the power so shock absorption during bending or staming is improved. If required, additional tools can be mounted on the reverse side of the assembly plate, which was possible when a central driving wheel was used in conventional designs. Used for high speed automatic prodn. of shaped springs, leaf-springs, clips, electric contacts, and other small parts. Gives improved flexibility w.r.t. the sequency of mfg. operations which can be undertaken, e.g. the tools do not have to be located round a circle with a common pitch dia.

Device for protecting tools and workpieces from damage on a hydraulically or pneumatically operated stamping press

Abstract: A device for precluding improper operation of a stamping press including a control cylinder the piston of which is impinged on one side by a pressure medium and on the other side by a pressure medium having a variable constant pressure. Electrical switch elements are utilized to prevent the stamping operation from progressing unless preset conditions exist.

Photoelastic stamping analysis

Abstract: There is disclosed a method of analyzing formability, strain level, or a related physical characteristic of a given material for a blank which is formed into a desired shape comprising: providing a blank of said given material; applying a flowable photoelastic coating directly on a selected surface area of the blank which is to be analyzed and allowing the coating to cure; forming the blank into the desired shape, and subjecting the coating to analysis. Also disclosed is a novel calibration technique for quantitatively analyzing strain in the plastic region of the metal.

Process for manufacturing monobloc vehicle wheels

Abstract: A process for manufacturing monobloc vehicle wheels. A roughly shaped arte having the general configuration of a cylindrical disc is further formed in a sequence of steps including die stamping and widening in a press to form the final shape in preparation for finishing operations by conventional mechanical machining. These wheels which may be formed from light aluminum based alloys are especially suitable for large vehicles equipped with pneumatic tires.

Forming machine - for pre-stretching, compressed air deep drawing, and prod. stacking in a single station

Abstract: In the prodn. of articles e.g. beakers, from thermo plastic film by first heating this and then forming the articles, stamping them out and stacking them in a single station, the articles are delivered after stamping out by the locally fixed top cutter of the laterally displaceable stacking shafts behind this, the shaft and the auxiliary stretching unit being pushed alternately over the moult array. Used for prodn. of relatively deep articles from a thermoplastic film by mechanical pre-drawing and compressed air-forming in a single station in which they can also be stamped out and stacked.

Multi-track machine press

Abstract: A multi-track machine press is disclosed having a base, a vertically movable ram mounted to the base, and a plurality of horizontally movable slides under the ram. A plurality of master die sets each comprising a plurality of step-height dies arrayed parallel to the motion of the slide have a lower half mounted to the slide and an upper half mounted to the corresponding portion of the ram directly over the particular slide. The slides move horizontally in unison. The upper and lower portion of each master die set come together during a work stroke for a stamping operation when the slides are at a first zero velocity position, and are indexed one die lead for a transfer operation during a deposit stroke when the slides are at a second zero velocity position. The multi-track machine press is thus capable of performing a series of separate die stamping operations while minimizing the amount of scrap from the coil strip stock fed into the press for producing parts.

Printer needle guide means for mosaic printers

Abstract: Mosaic printer needle guide structure comprising at least a pair of grooved guide members assembled together and having cooperating complementary confronting grooves providing guides for the printer needles. The guides are made by stamping or embossing rolled or drawn sheet metal.

HF surgery electrode - is made of flat spring metal stamping fitting into adaptor for electrode holder

Abstract: The electrode (1) for high frequency surgery can be made as a flat stamping of springy metal. It can be shaped with two spade ends (2, 3) joined by a thin strip (4), one spade end (2) being the active part. This can be inserted into a resilient gripping member (6) for insertion into an electrode holder (5) without rotation. In one design the electrode can be a strip with pointed ends, and either end can be inserted into the gripping member (6). In another design (fig. 3) the thin strip between two spade ends can be bent into a circle, so that the ends can be inserted into the gripper. The circular part then forms the active part. A further design has a spade portion with an active part in the form of a bent wire attached to it.

Press tool die-set for stamping - where punch guide-plate is fixed to upper die-plates by bolt assemblies contg. springs

Abstract: Stamping and blanking tool which can be placed on a press table and consists of a bolted assembly of plates, the lower die contg. the blanking hole and, fixed to the pres - ram, is the upper die assembly provided with at least one blanking punch and a moving guide-plate for the punch, the guide-plate being connected to the upper die by spring mountings and connecting bolts. The novelty is that the upper part of the connecting bolts contains a round axial hole for a helical compression spring which has a support face in the upper die-plate and forces the guide-plate downwards. The connecting bolts are pref. fitted with a collar sliding in a hole in the upper die-plate.

Contact housing for keyboard or slide switch prodn - uses coating of sheet metal grid with plastics, leaving specified strips bare

Abstract: The contact housing for a keyboard or multiple slide switch is produced by surrounding a sheet metal grid (1) with a plastic jacket (3) in such manner that in the lower row parallel metal strips remain free and serve as connecting pins (4) Parts of the metal strip of the nearest upper row are also free and serve as contact paths (5) Guides (8) are provided in the plastic jacket for spring contact support (6), and subsequently an electric circuit is formed from the sheet metal grid by stamping which interrupts the grid at preset points Preferably compression springs holders are formed into the plastics jacket which may also contain stops for securing the operating position of the spring contact supports

Dry compaction press for plate manufacture - has multi-component dies with internal designs incorporating plate foot

Abstract: The press for dry compacting of plates with a rigid lower die, has the upper die subdivided into an annular die (5) mounted on the matrix jacket (2) and a movable middle die (11) divided at a point (9) which lies at the mid-point, pref. outside of the foot section (18) which will be formed onto the plate (17). The stamping stencil is so contoured that it distributes the filler material into the appropriate regions of the die. The middle die (11) has an annular rill (13) on its pressing surface, directly attached to its outer wall which is used to form the plate foot (18) in the finished item.

High-energy rate forging machine

Abstract: In a high-energy rate forging machine the piston, to which a ram is attached, is driven towards a workpiece by a high pressure gas supplied to the space above the piston within a cylinder. The space above the cylinder and the space below the cylinder are joined by holes in the cylinder and grooves in the cylinder walls. The grooves are only effective when the piston is at about the middle to lower part of its stroke. They are blocked when the piston is at or near the top part of its stroke. High speed stamping is provided without double or triple stamping and with a smooth return stroke of the piston.

Method of manufacturing a pallet lever and pallet lever made by this method

Abstract: A pallet lever which is made by first stamping regions, the surfaces of which will be working surfaces and thereafter blanking out the shape of the lever to dimensions in excess of the area of the stamped portion so that the working surfaces of the stamped portion are protected against surface damage to the blanking out operation

Sheet metal workpiece holder for stamping-presses - permits limited vertical movement of sheet during stamping

Abstract: Workpiece holder for machine tools using a cross-slide to hold the piece. First and second arms are connected between their ends by a pivot and one end (I) of one arm is fixed on the cross-slide; the other ends of both arms are provided with jaws for clamping the workpiece and a pneumatic device swings the arms on the pivot to operate the jaws; and a flexure device is located between the pivot and (I) so that the arms can move in the same plane as the pivot motion. The flexure device is pref. an integral part of one arm, flexure being achieved by a reduced cross-section. The workpiece is securely held in the two horizontal (x and y) directions but the clamp intentionally lacks rigidity in the vertical direction so the sheet metal can move up and down during stamping, e.g. up to the stripper-plate.

Packing machine for pharmaceuticals etc. to be packed in foil sheets - by means of a cross over of the two sheets at the packing station

Abstract: The invention refers to a main French patent (7602299) which describes a packing machine. The machine is in the form of a cross and has two feed lines at right angles to each other, with the packing position at the cross. The sheets are formed at previous locations. The objects are located in between the travelling sheets which may be preformed by blistering or stamping. The machine is operated pneumatically and electrically. Pretreatment of one of the sheets may take place at a location before the packing location.

Side member for spectacle frame - has metal insert embedded in plastic plate forming part of swivel for side piece

Abstract: The movable side member for spectacle frames is designed for speedy assembly and to meet more stringent demands than conventional constructions using screw fastenings. The flange plate (1) of plastic material has embedded in it a metal insert (2), which is in cross-section a U-shaped stamping with projecting axle journals (2 1V). The latter have discontinuous surfaces which fit into bearing apertures of the member framework. Pref., the U-shaped stamping narrows at the junction with the piece having projecting axle-journals, so that a springing action is obtainable during assembly.

Improvement of precipitation hardening stamping die ste el

Abstract: PURPOSE:Precipitation hardening stamping die steel having fine quenching grain size, high toughness and strengthened matrix to provide longer life of die.

Flat flexible cable having printed conductors - has supply and control conductors for multiple devices, removed by stamping

Abstract: The cable run is formed on a flat flexible strip containing printed conductors, designed for the connection of the controls of earthed electrical devices to a current source. All the electrical devices are connected to a current-conductor through a control element which supplies current when a control signal reaches the control element via a corresponding control conductors arranged on it as well as the operating conductors going to the control elements of the operating elements. The operating conductors and/or the control conductors and/or the operating current conductor are partially removed by stamping from the cable strip.