Showing papers on "Stamping published in 1990"

Stamping and forming machine having toggles for reciprocating the tooling assemblies

Abstract: Stamping and forming machine (2) of the type having opposed tooling assemblies (22,22′) which are reciprocable towards and away from each other has toggle mechanisms (28,28′) for moving the tooling assemblies (22,22′) along their paths of reciprocation. Each toggle mechanism has one toggle link (30,30′) pivoted to a tooling assembly (22,22′) and another toggle link (32,32′) pivoted at a fixed pivot location (38,38′). The fixed location pivots (38,38′) are adjustable (62,62′) in order to control the position of the tooling assemblies when they are in their closed positions. Additionally, an adjustable wear plate (18) is provided in the passageway (8) in which the tooling assemblies (22,22′) are mounted. Advantages achieved include reduced manufacturing cost for the machine, potential for high operating speeds, and compactness when desired.

Circuit arrangement on a support film

Abstract: The circuit arrangement has at least one electrically, cut conductor track on at least one surface of a support film, the support film being free of deformations and fluctuations in the thickness, both in the region of the conductor track covering it and outside this region. The edges of the conductor track have a projection in the form of a stamping burr. A negative circuit is applied to a stamping substrate or embossed in the latter by means of embossing dies or punching tools constituting a block; the conductor track representing the remaining positive circuit is transferred to the support film.

Hot rotary stamper apparatus and methods for metal leaf stamping

Abstract: A continuous sheet 27 of metal leaf advanced at a constant rate is moved at variable velocity through a rotary die stamper 6, 7 such that between stamps the metal leaf moves at a velocity which is slower than the velocity of a substrate web 28; but just prior to stamping the metal leaf is accelerated by contact between the metal leaf sheet and a raised die 5 rotating at the velocity of the substrate web so that when the stamp occurs the metal leaf sheet is travelling at a velocity substantially equal to the velocity of the substrate web. Varying the velocity of the metal leaf sheet has the effect of minimising the distance the metal leaf sheet travels between stamps which conserves consumption of the metal leaf sheet. Separate means for accelerating the leaf sheet prior to stamping and decelerating the leaf sheet after stamping may also be provided.

Windshield wiper with excess load relief

Abstract: A windshield wiper drive link is pivoted indirectly to a crank arm through an intermediate toggle member and a pair of oppositely directed beams cut into the side walls of the drive link stamping. Under excess load, one or the other of the beams will buckle in compression, allowing the drive link to in effect change length, thereby yielding to avoid overload.

Technique for manufacturing a light modulating device

Abstract: A process for manufacturing a light-modulating device comprising manufacturing (using known techniques, in particular, of extrusion, rolling, calendaring and coating) a film sheet or strip formed of at least one layer of electrolytic material applied to a counter-electrode in the form of a preferably flexible film, sheet, strip, or equivalent; and cutting out elements in the form of dots, segments or strips in this composite sheet or film (by means of known techniques, in particular, punching, stamping and laser cutting).

Elastoforming die/form block comprising low-hardness silicone elastomer

Abstract: Resilient, crosslinked silicone elastomers shaped as elastoforming dies or form blocks for the stamping of sheet material workpieces, e.g., ultra-thin sheet metal, and well adopted for applications in the automotive industry, comprise a crosslinked fluid organopolysiloxane including at least one silicone-compatible organic or inorganic plasticizer within the crosslinked network thereof, said at least one plasticizer being stable and nonmigrating under elastoforming stamping conditions, and said at least one plasticizer being present in such amount that said plasticized silicone elastomer has a Shore 00 hardness of less than about 40.

Material handling method and apparatus

Abstract: A method and apparatus for handling sheet metal stampings such as automotive body panels. A rack is disclosed in which a plurality of runner assemblies are positioned proximate the floor of the rack with each runner assembly including a galvanized steel base member secured to the floor structure of the rack and a top member secured to the base member. The top member includes a galvanized steel substrate and a cladding applied to the upper face of the substrate. The cladding comprises a lubricous material such, for example, as a polypropylene so that the cladding not only provides a mar-resistant surface to protect the finish of the sheet metal stamping but further provides a low friction lubricous surface to facilitate the sliding movement of the stamping along the runner as the stamping is moved into and out of the associated rack structure.

Method of producing an air bladder from two uncured membranes

Abstract: An air bladder is formed by producing a foil imprint on an inner surface of a first uncured rubber sheet, by heat pressing the imprint from a hot roll leaf stamping tape to the sheet. The first sheet is delivered from a reel to the heat press via a driven roller and idler roller combination. The hot roll leaf stamping tape is delivered above the first sheet via a take up reel and idler roller combination. The heating press includes a heated platen having the contour of the desired imprint, such that the imprint takes on the shape of the heated platen. A second sheet of uncured rubber is laminated to the first sheet, with the second sheet laminated over the first sheet, thereby convering the imprint. The two sheets are vulcanized which cures the non-imprinted surfaces of the rubber sheets together, thereby forming an air pocket in the shape of the imprint between the two sheets.

Sample preparation system for iron and steel samples

Abstract: In a sample preparation system for iron and steel samples, a grinding machine (1) with a stamping device (2) and/or a cutting machine (3), as well as transport devices (7 to 12), form a modular structural unit for the input, output and transfer of samples. In this case it is possible to connect the stamping device (2) having an integrated robot (20), a sandblasting unit (26), an inductive heating station (27), a sample crusher (25) and a plurality of stamping machines (28, 29, 30) for lollypop samples, and the cutting machine comprising a rotating clamping chuck (31) and an adjustable cutting grinding wheel (32) for cylindrical and conical samples, to a grinding machine (1), which forms the central module and contains a rough and a fine grinding device (18, 20), a cooling device (19) and a clamping device (14) for the samples, and which grinding machine (1) has a dust removal connector (13) for the central removal of dust. The clamping device (14) is embodied in block shape and has two clamping jaws which are movable in respect to each other in two stages.

Representation of material behaviour in finite element methods of modelling sheet forming processes

Abstract: Recent progress in the evolution of sheet metal forming from a craft based into a science based technology is reviewed. Examples of methods used in the first phase of application of finite element modelling techniques, to press forming operations which involve stretching and deep drawing over metal tools at ambient temperatures, are considered from the viewpoint of the user, rather than that of the programme designer. Because the interactions between material and process variables which influence performance in sheet forming are exceptionally complex, the requirements for accurate modelling can be very demanding. In some applications, knowledge of the plastic behaviour of the material and of frictional conditions is not yet sufficient to meet the requirements for accurate prediction. Recent experimental and theoretical work which is aimed at refining descriptions of plastic behaviour and of frictional conditions is outlined. It is expected that the degree of elaboration in constitutive equations ...

Prodn. of printed circuit panel by stamping conductors in meta strip - moving strip into injection mould and cutting conductors, and injecting polymer encapsulate

Abstract: A printed circuit type panel with stamped out conductors is produced by (a) stamping out the conductors from metal strip but leaving them still joined to the strip by bridging pieces; (b) feeding the stamped out strip into an injection mould; (c) closing the mould so that the conductors are cut by piercing tools and are held onto them; (d) cutting off at least the inner bridging pieces with a punch tool; and (e) encapsulating the conductors by injection moulding. A metal strip (15) is advanced from the right to the left and into a stamping station where the conductors (17,18,19) are cut out but remain connected by the attaching bridges (31,32) together and to the strip (15). Terminal pieces (33) are also formed. The strip (15) is next moved into the injection mould. When the mould tools close, piercing tools (35) and cutters enter the strip (15) to complete the cuts concerned. The conductors are then held by the piercing tools (35) and the inner conductors are separated off from the bridging pieces by the cuts (32). Thermoplastic polymer is injected to fill in the gaps. ADVANTAGE - The method is automatic, accurate and economical.

Die changing system and apparatus for stamping presses

Abstract: Apparatus and a system for changing die sets in stamping presses including movable die set support carts which are positioned in a remote pre-staging or loading (and unloading) area when the presses are being used for stamping and which are positioned adjacent the presses to load a new die set into the press from one cart and to simultaneously unload an old die set from the press to another cart during a die set changing procedure.

Method for the manufacture of die-forged or die-stamped workpieces

Abstract: The invention relates to a method for the manufacture of die-forged or die-stamped workpieces, in which, after the stamping or forging process, the burr on the rough workpiece is removed, and the rough workpiece is machined at least at the functional faces, and subsequently heat-treated to achieve a structural change in the material. In order to eliminate some of the machining steps and thereby achieve a faster and less expensive manufacture of the workpiece, a trajectory laser is used to remove the burr on the rough workpiece. The removal of the burr is preferably carried out after the heat-treatment of the rough workpiece, whereby the laser also produces the functional faces of the rough workpiece in the same manufacturing step.

Method of changing stamping die sets

Abstract: In a stamping operation using several presses, a new group of dies must be substituted for an old group of dies in a rapid manner for efficient use of the press line. A method for rapid exchange of dies includes: loading and unloading a die sets on to and off of transporter carts in a remote area from the presses to permit press operation during this time; moving the carts and new die sets into positions adjacent the presses; simultaneously moving an old die set out of a press and onto the cart and moving a new die set off of the cart and into another adjacent press.

Aqueous blanking solution for solid film prelube forming operations

Abstract: A blanking solution containing surfactants, corrosion inhibitors, and optionally biocides and antifoam agents can be applied to steel blanks in a stamping or drawing mill to prevent the transfer of solid film prelube lubricants from the steel blanks to the transfer rolls in the mill. The surfactant is preferably a nonionic surfactant which does not have any essential effect on the coefficient of friction when the prelubed steel blanks are stamped or drawn to form the final part.

Application of a Fourier Transform-Phase-Slope Technique to the Design of an Instrument for the Ultrasonic Measurement of Texture and Stress

Abstract: This paper describes the development of an ultrasonic instrument to measure texture (preferred grain orientation), stress, and related physical properties in metal sheets in industrial environments. The technique is based on precise measurements of the speed of guided modes, including angular variations, and is made practical by the use of EMAT transducers, which require no couplant. The instrument is expected to find important initial applications in predicting sheet metal formability, either as a process control tool in the rolling mill or as a quality control tool in a stamping shop. Since the instrument will offer an improved measurement capability not presently available to industry, a much broader range of applications may develop, including measurements of stress and porosity in sheet and other simple geometries.

Manufacture of decorative veneer with groove

Abstract: PURPOSE:To improve an external appearance by enabling formation of a sufficiently deep groove and eliminating a sense of incongruity of the inside of a groove, by a method wherein a ligneous veneer for decoration of the surface is made into a state where the veneer is folded into both the sides of the upper part of the groove and stamping molding of the recessed groove whose section is in a V-shaped state is performed. CONSTITUTION:A flat-platelike board 1 is made into a flat-platelike decorative plate A by sticking a ligneous veneer 2 for decoration is stuck to the top of the flat-platelike board 1 through a colored adhesive agent 3. Then after a notch 4 is provided on at least the ligneous veneer 2 of the surface of the decorative plate A along a scheduled position for grooving or without providing the notch, stamping processing shaping a decorative recessed groove 9 on the surface of the decorative plate A is performed. Then the surface of the decorative plate A is pressed by making use of a stamping plate 8 or stamping roll provided with a grooving projected line 7 whose section is almost in a V-shaped state on a position corresponding to the foregoing notch 4 and the decorative recessed groove 9 corresponding to a form of a large number of projected lines 7 is formed in the surface of the decorative plate A in a parallel state through pressing-in.

Method of producing a continuum of labels

Abstract: A method of manufacturing a continuum of labels (114) comprises: a step of sticking a label material paper (114a) to a release sheet material (112) by means of an adhesive layer (116); a step (156) of stamping labels of a predetermined shape out of the label material paper from one principal surface to the other principal surface; a step at a plate (156) of parting the label material paper and release sheet material from each other in the boundary plane between the adhesive layer and the release sheet material; a step (166, 168) of re-sticking the release sheet material to the stamped-out label material paper; and a step (168, 170) of parting unnecessary parts of the label material paper from stamped-out labels Alternatively, the stamped-out label material paper may be re-adhered to a second release sheet material (Fig 1 (not shown))

Method of executing additional processes of work operations on bar material workpieces and machine for carrying out such method

Abstract: The machining system for bar stock secured at one end in a chuck and fed into a bending machine. Before and/or after a bending operation, the work (7) is subjected to additional operations, such as stamping, drilling, cutting, pressing or parting off. There are pref. one or more additional machining heads (13) in front of and/or behind the bending head (8), which are movable w.r.t. the work.

Method for making a holographic image on a metallic object and tool for carrying out the method

Abstract: A holographic design is produced on a metallic article, made of gold or silver for example, by reproducing a micro-embossed image on the surface of this article directly by stamping at room temperature, this micro-embossing being such that it can be observed in white light in the form of a hologram. A stamping tool for implementing this method carries on the free stamping face a metallic film in the form of a negative of the desired holographic image, this metallic film being attached in such a way that it can be removed.

Stamping and forming machine having interchangeable punch sub-assembly

Abstract: A punch assembly (4) of a stamping and forming machine has a separate sub-assembly (22) which is removably secured to the ram (20) of the punch assembly (4). The sub-assembly (22) comprises a punch holder (36,38), a stripper plate (40), and at least one punch (46) The stripper plate (40) is coupled to the punch holder (36,38) by a lost motion connection and the punch holder (36,38) is secured to the punch ram (20) by fasteners. The fasteners are accessible through access openings (90) which extend into the facial surface (54) of the stripper plate (40). The practice of the invention permits the use of only one ram (20) with a plurality of sub-assemblies (22) and thereby reduces tooling costs.

Extended measuring lead

Abstract: A measuring lead, equipped with circuit elements each consisting of a switch and a resistor, is produced by continuously stamping connecting tongues from a sheet metal plate, the tongues being equipped with the resistors and switches, and by spraying on a plastic housing for each circuit element.

Method of progressively making a model of multiple assemblies

Abstract: A method for progressively making a model of a sheet metal assembly composed of several connected sheet metal panels, or a model of several interfitting sheet metal assemblies. Each sheet metal panel is represented by a carbon fiber sheet formed between a pair of blocks machined to form a cavity corresponding to the thickness of the sheet metal. The thickness is initially represented by a wax layer corresponding to the thickness of the sheet metal. The wax layer is removed and replaced by a carbon fiber epoxy-based material. One of the blocks is then used to form the replica of a second panel of the sheet metal, adjacent the first panel. The process is repeated until replicas of all panels have been made. The carbon fiber replicas are attached to one another to form the completed model of the sheet metal assembly or a model of several interfitting sheet metal assemblies. The machined foam blocks may be used as tooling aids for forming dies for stamping the sheet metal components.

Burner for air-gas mixt. mfr. - involves sheet metal strip by sequence of stamping, folding and deep drawing, starting with shaped end stamping

Abstract: The burner is mfd from a sheet metal strip, in which the end walls are first formed by stamping A longitudinal ridge (34) is then formed by bending the strip and the edges (43,44) are turned outwards A longitudinal trough is formed by deep drawing, and the sides (71,72) of the strip are double folded to form the lower edges (47,48) so that the ridge edges are turned inwards Transverse slots are formed in the bottom of the deep drawn recess, and the sheet metal is folded outwards to form slots for the outflow of the air-gas mixt ADVANTAGE - No need for combining components, forming the combustion chamber

Method of manufacturing registration plates, especially for motor vehicles, and registration plates obtained

Abstract: The invention relates to a method of manufacturing registration plates, especially for motor vehicles, and to the registration plates obtained. The plates are of the metal type, comprising raised characters coated with a coating of lacquer paint, for example white lacquer paint, standing out from a background surface of another colour, for example black, these plates being made up of a metal support plate 5 carrying, on the surface, the said coating of lacquer and of a thin bottom metal sheet 9 carrying, on the surface, the said background colour, this sheet being assembled to the support plate 5 by pressing (stamping) by virtue of the gripping of its edge on a peripheral rim 7 formed on the support plate and defining a ledge strip 11. In the method, the support plate 5 is lacquered directly in the factory (after rolling) with a coating of lacquer between 5 and 15 microns thick.

Method for the fabrication of a lead frame

Abstract: The outer portion of a die stamped metal frame encompas­sing the outer ends of the electrical connecting pins is subjected to press striking for re-establishing planarity and parallelism of the opposite places of the patterned pins which have become deformed during the die stamping, before proceeding to the assembly operations. The eventual bending of the pins of the finished product between a bending punch and a contrasting punch is performed on pins having planar and parallel faces thus preventing twisting and slanting of the bent pins.

Method for molding decorative film and stamping apparatus

Abstract: PURPOSE:To form a decorative film excellent in a three-dimensional feeling by a method wherein an under coat molding material is irradiated with ultraviolet rays while a stamping body is pressed thereto to be cured and molded and the cured surface is coated with a metal vapor deposition layer and top coat is applied to said vapor deposition layer. CONSTITUTION:The surface of a product base body 1 such as a synthetic resin molded product is coated with an under coat molding material 2. A stamping body 6 having a stamping picture 6b on the surface thereof and transparent to ultraviolet rays is pressed to the surface of the under coat molding material 2 applied to the surface of the product base body 1. The under coat molding material 2 to which the stamping body 6 is pressed is irradiated with ultraviolet rays through the stamping body 6. After the curing of the under coat molding material 2, the stamping body 6 is separated. The surface of the molded under coat is coated with a metal vapor deposition layer 3 by a metal vacuum vapor deposition method and top coat is applied thereto. As a result, a decorative film excellent in a three-dimensional feeling can be formed.

Plastic sheet frame and manufacture thereof

Abstract: PURPOSE: To prevent occurrence of weld, though long fiber advantageous in strength is contained, by forming to a desired form by stamping a blank material comprising a fiber reinforced plastic. CONSTITUTION: A sheet frame 1 is formed integrally by stamping. The stamping formation is made by pressing a heated long fiber blank material 12a and heated short fiber blank materials 12b, 12c with molds 10, 11. The respective blank materials 12a, 12b, 12c are planar fiber reinforced plastics and are cut to sizes similar to the size of a bottom plate portion 2. The long fiber blank material 12a contains long fiber 16 in the thermoplastic matrix resin 15. The short fiber blank materials 12b, 12c contain short fiber 17 in the matrix resin 15. Therefore, by at least the short fiber 17 flowing in, the resin 15 is reinforced so that the occurrence of the disadvantage in strength is evaded. COPYRIGHT: (C)1992,JPO&Japio

Method and apparatus for disintegrating fibrous material

Abstract: For this stamping method, the fabric material between surfaces of two stamping parts is expressed more mechanically, the vibration of two stamping parts is synchronistical and opposite. the device consists of two stamping parts by which operating surface is formed stamping zone. The eccentric block is mounted on stamping part. the dynamic balancing mechanism is mounted on the device. The mechanism consists of second stamping part and eccentric block.

Step for automobile

Abstract: PURPOSE:To solve a problem of strength and difficulty to slip or the like by forming by stamping a stamping molded material consisting of polyethylene terephthalate (PET) system resin containing a glass long fiber as the reinforcing material. CONSTITUTION:This automobile-use step 1 is formed by integrally molding by stamping a step plate 2 and mounting parts 3, 4, 5 in the periphery of the step by using a stamping molded material consisting of polyethylene terephthalate (PET) system resin containing glass long fiber with a total unit serving as the reinforcing material. The stamping is the method of supplying the resin, after it is preheated to a temperature not less than the softening point or the melting point, between a pair of metal molds suddenly applying a pressure performing the stamping, and the step in the above is manufactured, using the glass long fiber as the reinforcing material to be alternately overlapped with a PET system resin sheet, supplied to a device having a pair of belts vertically, heated to not less than the melting point of the resin, simultaneously pressurized and being cooled after the resin is integrally formed with the reinforcing material.