Showing papers on "Stamping published in 1978"

Mechanics of sheet metal forming : material behavior and deformation analysis : [proceedings]

Abstract: Session I-State of the Art.- Chairman: W. Johnson, University of Cambridge.- Sheet Metal Stamping Technology-Need for Fundamental Understanding.- Discussion.- Experimental Studies of Material Behavior as Related to Sheet Metal Forming.- Discussion.- Plasticity Analysis of Sheet Metal Forming.- Discussion.- Session II-Constitutive Relations for Sheet Metal.- Chairman: E. H. Lee, Stanford University.- Plastic Deformation Behavior Under Conditions of Combined Stress.- Discussion.- Sheet Necking-I. Validity of Plane Stress Assumptions of the Long-Wavelength Approximation.- Sheet Necking-II. Time-Independent Behavior.- Discussion.- Session III-Role of Friction.- Chairman: J. J. Jonas, McGill University.- Friction and Lubrication in Sheet Metal Forming.- Discussion.- Drawbead Forces in Sheet Metal Forming.- Discussion.- Session IV-Instability Processes.- Chairman: S. S. Hecker, Los Alamos Scientific Laboratory.- Sheet Metal Forming Limits.- Discussion.- Limits to Ductility Set by Plastic Flow Localization.- Discussion.- Sheet Necking-III. Strain-Rate Effects.- Discussion.- Plastic Flow Properties in Relation to Localized Necking in Sheets.- Discussion.- Session V-Analysis of Deformation in Stamping Operations.- Chairman: B. Budiansky, Harvard University.- Deformation Analysis of Large Sized Panels in the Press Shop.- Discussion.- Deformation Analysis of Axisymmetric Sheet Metal Forming Processes by the Rigid-Plastic Finite Element Method.- Discussion.- Elastic-Viscoplastic Analyses of Simple Stretch Forming Problems.- Discussion.- Symposium Summary.- Participants.

Drive for the movable work component, such as the ram of a press, stamping machine or the like

Abstract: A drive or drive arrangement for a movable work component, such as the ram of a punch press, stamping machine or the like, comprising a crosshead driven by a crank drive. At both sides of the crosshead there are hingedly connected one respective end of single-arm levers, the other ends of which are hingedly connected with threaded spindles supported in the machine housing for adjusting the stroke of the drive, and the intermediate bearing or support locations of the levers are hingedly connected via connecting or pressing rods with the ram.

Method of making electrical contact

Abstract: A method of making an electrical contact wherein the contact includes a plurality of axially aligned wires (200) extending from a forward end (110) of a holder which has a rear portion (130) for receiving an electrical conductor (300). The holder (100) is manufactured by stamping it as a flat metallic piece with enlarged forward and rear portions then forming the forward portion (110) in a die to form a socket like portion for the plurality of fine, axially aligned wires and forming the rear portion (130) to receive the conductor (300).

Die stamping and scoring device, and process for the manufacture thereof

Abstract: A die stamping device for cutting, scoring or creasing a pattern of shapes onto laminar material, comprises a die cylinder having a solid cylindrical core with a coating of setting material such as plastics in which are fitted cutting or scoring blades the radially outer surfaces of which define the pattern to be cut or creased onto laminar material passed in sheet or web form between the die cylinder and a smooth pressure cylinder, which may be provided with cooperating elements, such as resilient blocks or engraved recesses to cooperate with the scoring or creasing blades; the die cylinder is made by a process involving forming a pattern on the outer surface of the coating by photographic techniques, and then removing the coating from the solid cylindrical core to facilitate cutting out the openings to receive the blades

Hand operated cutting tool

Abstract: Mechanical or hydraulic press stampings are widely used for a manufactured product as thin material may be accurately blanked thereon so that only a minor amount of expensive machining is required. A compound pivot plier-type tool is provided wherein a pair of handles is pivotally mounted on and between a pair of plates which form a recess for the reception of a selected pair of jaws which are mounted therein by removable means so that a kit can be furnished with a pair of handles and mounting plates and several of the same or different types of pairs of jaws which may be easily substituted, one for the other in the recess between the plates for operation by the handles. The parts are relatively thin so that they may be largely formed by mechanical or hydraulic press stamping operations with resulting low labor costs.

Code imprinting system having error preclusion function

Abstract: The system is used for imprinting indentification code on individuals of articles such as automobiles produced in quantity, particularly on an assembly line, and comprises an instruction unit to provide a data signal representing an identification code to be imprinted, a stamping machine in which setting of imprinting types is performed automatically according to the data signal, a sensor which provides a signal representing an actual state of the type setting, and a comparator which provides an operation signal to the stamping machine only when the signal from the sensor agrees with the data signal and otherwise provides an alarm signal. For further accuracy of imprinting operation, the system may include a sensor to detect the type of the individual article to be imprinted and another comprator to prevent the action of the stamping machine also when the type of the article differs from one implied by the data signal.

Manufacture of detergent bars

Abstract: of the Disclosure: The manufacture of detergent bars having liquid, for example a coloured liquid, injected into the mass is described in UK 1387567. The present invention describes manufacture using a single screw plodder providing two streams of extruded detergent material for cutting and stamping. A partition is provided in the extrusion cone to provide improved quality of external striping.

Apparatus for handling of flat goods

Abstract: Flat goods such as sheets of cardboard are destacked or removed from a stack for the purpose of further processing, especially in stamping, cutting, or break-out devices. A carrier is introduced into the stack. The carrier has a surface which remains stationary relative to that portion of the stack which is being removed when the carrier is withdrawn from the stack. For this purpose the carrier which is supported in a frame, is provided with a surface which is movable relative to the carrier. The movable surface is guided at least around the leading edge of the carrier.

Assembly plate for assembling cam parts of a knitting machine

Abstract: A simple and easily manufactured assembly plate for receiving cam parts of a knitting machine in a predetermined position and in which the assembly plate is easily positioned in a knitting machine. The plate is provided with positioning projections, pins or the like which properly position the cam parts and which are formed by simple stamping procedures or by casting or extruding plastic materials.

Relationship Between Surface Characteristics and Galling Index of Sheet Steel

Abstract: The influence of annealing atmosphere and surface finish of cold-rolled steel on the occurrence of galling during stamping operations has been noted empirically for many years. In order to minimize the galling tendencies of drawing quality sheets a program was carried out to define pertinent surface features and their interaction during stamping. Commercial steel coils were processed in two types of annealing atmospheres, a hydrogen and nitrogen mixture (HN) and DX-type exothermic gas. The coils were then skin rolled to achieve a wide range of surface roughness. The sensitivity to galling was rated during the stamping of quarter panels and also by means of a sliding friction test in which the ratio of static to dynamic drawing force was used to designate a friction ratio that appeared to correlate well with performance. Surface finish was recorded by standard profilometry techniques, and chemical differences between the types of surfaces were examined by auger electron spectrometry; general aspects of the surfaces were studied by scanning electron microscopy. The critical frictional ratio was found to be 1.3, above which sheet steel has galling tendencies. Galling in HN-annealed steel was found to be surface-finish sensitive, and a range of surface finish parameters for nongalling characteristics has been established. DX-annealed steel appeared to be insensitive to the effects of surface finish, and differences in surface films were detected to account for the frictional changes.

End cap mfr. for cans - uses large sheets cut into zigzag strips which are then welded end to end

Abstract: The method of manufacturing end caps for cans begins with cutting zig-zag strips (2) from large sheets. A row of location holes is pierced in each strip along a central line. The strips are then joined together end to end by tack welding. The dimensions of each strip are such that, after welding, the distance between the end location hole in one strip and the corresponding hole in the next stri is exactly equal to twice the pitch of the holes in each row. This spacing of the location holes enables the continuous strip formed by welding to be fed into a blanking press for stamping the circular blanks of the end caps.

Method for constructing a suspension member

Abstract: The present invention relates to a suspension member and the process for constructing the suspension member. The suspension member comprises a folded single sheet of metal which is enlarged at one end to couple to a wheel assembly and U-shaped at the other end to pivotally connect with a vehicle frame. The process of constructing the suspension member comprises the steps of stamping a single sheet from a piece of stock, deforming the sheet to form a pocket defining the enlarged end, folding the sheet to form a substantially rectangular cross section and welding the seam between adjoining edges of the folded sheet. In order to support a spring assembly a tube extends through the folded sheet and cooperates with the spring assembly to attach the latter to the folded sheet.

Tool for the stamping of holes or the like in sheet material such as metal plate

Abstract: The invention concerns a tool for stamping of holes or the like in sheet material, such as metal plate. The tool is mountable on a handheld motor, such as a pneumatic or hydraulic piston and cylinder motor and comprises a stationary part supported against the motor cylinder and a movable part connectable to the motor piston. The displaceable tool part has at least one slot at right angles to the direction of the motor stroke and a through drilling extends through said slot at right angles thereto at a distance from its base. The portion of said drilling at the outside of the slot is formed as a stamping die, and the portion thereof inside of the slot accommodates a stamping plunger, whose inside end engages the stationary tool part. When a piece of sheet material is inserted into the slot with its edge in engagement with the base thereof and the motor is actuated, the plunger stamps a hole in said sheet material at a fixed distance from its edge. One embodiment of the device provides a slot for deforming sheet material on one side of the tool opposite the slot for stamping.

Revolving electric machine

Abstract: PURPOSE:To facilitate manufacture and reduce rejection factor by stamping cooling fins integral with core sheets and laminating these sheets so that the lamination also serves the prior-art frame.

Multitrack mechanical 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

Hot die and foil printer

Abstract: In a printing press comprising a type-bearing heating block, means adapted alternately to apply the block under pressure along a printing surface onto a sheet to be printed located on the surface and to release the block therefrom, and means to interpose a stamping foil between the type-bearing block and a sheet to be printed located on the printing surface, the improvement wherein the printing surface is inclined sufficiently for a printed sheet to slide from the surface under the influence of gravity, and means are provided to hold a sheet in position on the surface which means are releasable by movement of the type-bearing block away from the printing surface after a printing operation to allow the sheet to slide from the printing surface.

Sheet bending machine with corrugated gripping elements - employs swinging action for elements until required bend angle is obtained (SW 11.7.77)

Abstract: A sheet folding or bending machine has the surface of the bend stamped at the bottom along a straight line at right angles to its length, made radially to a parallel shaft on the same side of the sheet. The suspension elements are spaced closely together before the start of this stamping action, with corrugations which interlock so as to allow the inside of the sheet to bend. This process is repeated until the required bending angle is obtained, and the sheet is released each time by swinging the suspension elements through a predetermined angle. This angle is a sub-multiple of the bend angle required.

Material strip repetitive stamping or separation device - uses driver first faster than material flow speed, then synchronising with it

Abstract: Installation for the repetitive stamping or separation of strips of material in profile machines, in which the working and cutting lengths are adjustable by means of a repeater selector, uses a separating slide with a saw operated by a material driver. The driver takes the form of an adjustable and displaceable stop, and is acted upon by damping cylinder which tends to slow it down, and which, after the machining process, acts as return cylinder. The driver(1), by switching on an accelerator drive cylinder(5), exceeds the throughflow speed of the material(7) to be worked, and then, by means of the damping cylinder (10), is brought back to the same speed as the material running through the machine.

Method and device for stamping ball retainers

Abstract: This invention provides for stamping of the platforms of a ball retainer on one side of the surface of the metal band and of the spherical seats on the other side of the surface of the band in a single continuous operation or in several operations. Two mating punches are used in order to stamp out the desired ball retainer. A first punch has rectangular upwardly projecting lugs and spherical recesses and the second punch has spherical outwardly extending lugs and rectangular recesses. As these two punches are moved toward each other, they cause the platforms and the spherical seats of the ball retainer to be stamped in the metal band. The lugs on each of the punches and the side surfaces of hollow recesses of the dies are provided with cutting edges, which cut out the ball retainer from the metal band.

Machine for stamping part code on industrial prod. - has electro-hydraulic drive to rotate discs carrying numbers to desired combination for stamping

Abstract: The machine for stamping identification symbols on products is operated by electro-hydraulic drive. A shaft (3) carries a row of discs (4) with reversed symbols (P) around their periphery. Each disc (4) is attached to a ratchet wheel (5) driven by a pawl (9) in one direction only. The pawls (9) are attached to sliders (11) attached to pistons (14) actuated by hydraulic or pneumatic pressure. The supply pressure is controlled by electro-magnetic valves controlled by a keyboard with symbols corresponding to those on the discs. When the required row of symbols are been chosen, pressure is applied to the shaft (2) to stamp the symbols.

Stamping die for making video storage patterns on plastic disks - using volatile metal film contg. pattern for electroforming of die

Abstract: A stamping die with a three-dimensional pattern is made by by using a substrate coated with a thin metal film and then a layer (I) of volatile data storage material contg a stored two-dimensional pattern of holes obtd by local evapn of layer Layer (I) has a thickness matching the desired stamping depth and is coated with an electrically conducting film (II) followed by an electrodeposited layer Substrate is then removed and layers (I) and (II) are removed by chemical etching Substrate is pref transparent plastic The metal film is 25 angstroms of Cr and layer (I) is pref a mixt of Bi and Se, which is covered by another film of Cr 100 angstroms thick Layer (II) being applied on top of layer and esp consisting of Cu 2000-3000 angstroms thick The electrodeposited layer is pref obtd from a nickel sulphamate bath The die obtd is used to press a phase contrast pattern into a transparent plastic disc similar to a gramophone record, which can be read out via a laser beam

Magnetron anode manufacture

Abstract: A method of manufacturing a magnetron anode and similarly shaped objects provides for the forming of anode vanes from a sheet of bulk material by stamping and the preparation of a tubular sleeve for forming the outer wall of the anode by punching a set of elongated slots therein. The vanes are inserted into the slots after which the periphery of each slot is crimped to cause a plastic flow of the material of the wall against the vanes to secure the vanes in their respective positions. The anode assemblies are then brazed in a furnace to permanently secure the vanes to the outer wall.

Stamping unit for base of crockery - has sensor for actuating unit positioned between centering and stamping stations

Abstract: Stamping unit for the bass of pieces of crockery (20) has a centering unit (2) positioned upstream of the stamping unit (4) above a continuously conveyer (6). The centering unit comprises a stop (19) located either side of the conveyer such that the spacing of the stops is adjustable to the width of passage required for the crockery. Both stops are each arranged on a slide (12, 13) movable along guide rods. Both slides have a toothed rod (14, 15) which meshes with a common gear wheel (16). A further toothed rod (24) aligned along the conveyer meshes with the gear wheel and carried a sensor (25) for the crockery piece on its free end.

Identification marking machine for steel ingots or billets - is fitted with vertical or horizontal holder with exchangeable symbols

Abstract: The stamping machine is capable of stamping multi figure numbers by stamping of one figure, followed by a selection of the next figure, stamping of that figure and so on. The types 0 to 9 are fitted with embossed numerals which may be individually exchanged without the need for long operating delays. The machines have a drive which is put into motion via an electric motor. The type holder is put into rotary motion via a coupling (2) which is connected to the shaft (3) of a pair (4, 4a) of bevel gears and also the two shafts which are connected to a Cardan joint (6).