Showing papers on "Stamping published in 1988"

Commercial scale production of Fe-6.5 wt. % Si sheet and its magnetic properties

Abstract: Commercial scale production of a Fe‐6.5 wt. % Si sheet has been successfully developed. Presently manufactured sheets are in coil form, whose thickness ranges from 0.1 to 0.5 mm with a maximum width of 400 mm. Magnetic properties of the manufactured sheet have been investigated. The permeability of Fe‐6.5 wt. % Si sheet is about 10 times higher than the conventional nonoriented silicon steel sheet. The core losses are less than half the conventional, and even less than that of the grain‐oriented silicon steel sheet at frequencies over 400 Hz. Superior soft magnetic properties are attributed to the low magnetostriction and high electric resistivity of this alloy. It is well known that the Fe‐6.5 wt. % Si alloy has poor ductility in conventional mechanical work. But investigation of the forming conditions has enabled the stamping and bending of alloy sheets. Low core losses and high permeability make Fe‐6.5 wt. % Si sheet adequate for motor cores, transformer cores operating at high frequencies, and magnetic shielding. Application to the micromotor core shows that Fe‐6.5 wt. % Si sheet reduces the consumption of no‐load electric current by 25% in comparison with the conventional silicon steel.

Image transfer tool

Abstract: A generally cylindrical image embossing tool which can be used for embossing a web of material in continuous manner is made by placing an image or pattern which is to be replicated onto an embossable material maintained in the form of a cylinder. An electroform in generally cylindrical form corresponding to the image or pattern to be replicated is formed from the imaged embossable material and the electroform is supported on a rigid cylindrical support to form the image transfer tool. A novel imaging tool has a curved stamping surface carrying an embossed image or pattern. The radius of curvature of the stamping surface matches the radius of curvature of a cylindrical surface which is to be stamped so as to transfer the image or pattern which is to be replicated.

Method for joining thin plates stacked on one another

Abstract: Method and apparatus for fastening thin plates (4, 5) overlying one another, via a fastening element formed from the material, which element is obtained by partial stamping separation and/or deforming of plate areas (10, 11) out of the plate plane via a male die (1, 21, 26) and a female die (2, 3, 23 and 31, 32) with subsequent compressing of the plate areas, wherein the plate areas (10, 11) that as the fastening element grip the stamping or deforming hole from behind are leveled into the plate plane, so that after the machining, on the outer surface of the plates that have been fastened together, no nubs remain that are noticeable from the outside.

Process for stamping detergent bars

Abstract: In a device for handling plastic material, such as a stamping device for stamping detergent bars, an elastomeric layer is provided on the handling surface which has good adhesion to the handling surface and good release from the plastic material. The elastomeric layer comprises at least two elastomeric coatings of different properties and/or compositions.

Method and apparatus for detecting a sheet strip material misfeed condition

Abstract: A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provides a voltage signal to a controller. The voltage signal is proportional to the amount of, or mass of, metallic material in each frame or stamping and the distance between the frame or stamping and the sensing device. The controller generates an individual waveform from the voltage signal for each frame passed in proximity to the sensing device. Each individual waveform is a function of the position of the movable portion of the stamping device for one cycle. As the plurality of individual frames are passed in proximity to the sensing device, a plurality of individual waveforms are generated within the controller. The waveforms are compared within the controller to detect a deviation between waveforms. A deviation between waveforms indicates a sheet strip material misfeed condition within the stamping device. If a sheet strip material misfeed condition is detected, the controller provides a signal to the stamping device to initiate stoppage of the stamping device. If desired, the plurality of individual waveforms may also be compared within the controller to detect a deviation in the configuration of the frames or stampings produced by the stamping device from a desired frame or stamping configuration.

Stamping molding sheet

Abstract: PURPOSE:To obtain a molding sheet capable of giving stamping molded articles of outstanding mechanical properties and heat resistance, by integrating a matrix resin made up of polyphenylene sulfide, polyamide and epoxy resins and fiber reinforcer into a composite. CONSTITUTION:The objective molding sheet can be obtained by integrating a matrix resin made up of (A) polyphenylene sulfide (pref., containing >=70mol% of a structural unit of formula), (B) polyamide (pref., nylon-6), and (C) epoxy resin (pref., novolak type epoxy resin) pref. in such amounts as to be 99-20pts. wt. for the component A, 1-80pts.wt. for the component B, and 0.1-20pts.wt. per 100pts.wt. of the components A+B for the component C and pref. 25-100wt% based on said matrix resin, of fiber reinforcer (pref., carbon fiber) into a composite.

Snap-in nut for frame attachment to body

Abstract: A nut is comprised of a one piece stamping having a base wall with an integrally formed conical nut. A frame member has a bolt receiving first aperture in a first planar wall and a nut receiving second aperture in a second planar wall extending at a generally perpendicular angle with respect to the first planar wall. The stamping has integral stop tabs which engage with the frame member to limit the insertion of the stamping into the second aperture so that the conical nut is registered with the bolt receiving first aperture. First and second integral flexure arms flex inwardly upon insertion of the stamping through the second aperture and then engage with the inner surface of the frame member to retain the stamping against removal from the frame member. Integral flanges engage with the walls of the frame member defining the second aperture to cooperate with the stop tabs and the flexure arms to maintain the base wall in position registering the conical nut with the bolt receiving first aperture and to restrain the stamping against rotation relative to the frame member upon the threaded installation of a bolt into the conical nut.

Metallic flat gasket material

Abstract: A flat gasket material for the production of single-layer or multilayer flat gaskets, in particular for combustion engines, consists of a sheet metal plate with an elastomeric coating on one or both sides, which coating is applied by the coil-coating method to the sheet metal plate from an elastomeric solution of nitrile butadiene rubber, hydrogenated nitrile butadiene rubber or fluorinated rubber in a solvent for the elastomers, and is dried and vulcanized, the solution containing as crosslinking agent an organic peroxide which has a decomposition point above 150@C, and containing an additive comprising micronized graphite with a particle size of less than 0.01 mm. The solution may also contain other customary crosslinking auxiliaries, processing aids and additives as are conventional in elastomer technology. Using the flat gasket material according to the invention, problem-free production of flat gaskets is possible by stamping and deformation.

Optical storage disk and method of its manufacture

Abstract: An optical storage disk consists of a glass substrate (1) into which guide tracks (3) for servo-controlling the focussed light beams are directly stamped in by hot stamp process. After stamping, the glass substrate is thermally quenched in the stamping device to increase its breaking resistance through thermal curing. In order to achieve uniform guide tracks over the entire surface of an optical storage disk, flexible stamp stencils (35) in a flexible holder (34) are used whose curvature can be changed by applying hydro-static pressure. Suitable stamp stencils consist of monocristalline silicon disks with surface hardening, or of metal disks, structured in photolithographic processes. The stamp lands are made with bevelled edges to facilitate the separating of stamp and glass substrate after cooling.

Process for making and/or for treating concrete blocks

Abstract: Process for making and/or for treating concrete blocks which are produced in moulds filled with concrete and are embossed on their surface by means of stamping, in which arrangement the stamps have recesses or projections with undercuts and thus rip, roughen or damage the surface of the concrete blocks, and, in a subsequent operation, the surface or edges of the concrete blocks are freed of loose parts and/or are additionally roughened or damaged.

Device for turning and stamping postal articles

Abstract: A device for turning and stamping postal articles contains a detector/control device which is arranged so as to be surrounded by a line for conveying the postal articles, in order to allow optical scanning of both surfaces of each postal article, and, furthermore, the scanning data are photoelectrically converted and digitalized, an address block on each postal article and a writing direction of the characters in the address block are ascertained on the basis of the digital data, and a control signal is emitted which constitutes a detection result. The device contains a turning device, a stamping device which may take the form of a cancelling device and a stacking device. The turning device, the stamping device and the stacking device are controlled by the detector/control device in accordance with the control signal.

Impeller made from a sheet-metal disk and method of manufacturing same

Abstract: An impeller formed from sheet-metal by stamping and bending, at a low production cost, capable of delivering an increased quantity of air at a reduced noise level and with reduced power consumption and enhanced efficiency. The method of manufacturing the impeller from sheet metal incorporates sufficient versitility to allow the blades of the impeller to be formed to any desired configuration in order to provide an optimum shape for the intended impeller use. The blades can be curved or twisted and can extend perpendicular from the sheet-metal surface or at any desired angle for optimum utilization.

Assembly of electronic trim part for vehicle

Abstract: PURPOSE:To obtain a light weight part, to reduce the manufacturing cost and to improve the productivity, by placing both an electronic trim part to be inserted and a resin mass forming a lining in a mold for stamping molding, and bringing the molds into contact with each other under pressure. CONSTITUTION:Both parts of connecters to be exposed outside of a lining at the time of completion are liquid-tightly inserted into fitting holes 13 and 14 made in a bottom force 19 through a seal material 15. Moreover, connection parts between a wire harness 8 and connecters 9 and 10 are also sealed with a seal material ]1 in advance in such a manner that a resin does not penetrate therein. The wire harness 8 is supported on a rib 19a projectedly set on the bottom force 19. Then, masses 17 of a thermoplastic resin are placed on the bottom forces 19, and a top force 18 is contacted with the bottom force under pressure. A base material 2 thus molded and a material prepared by laminating and adhering in advance an intermediate material 3 made of a resin foam and a surface material 4 comprising a felt material, or a polyvinyl chloride film and so on are monolithically molded by using a top force 21 whose shape coincides with the surface shape of the base material 2 and a bottom force 20 whose shape coincides with the surface shape of the surface material 4.

Process and installation for producing workpieces

Abstract: To cut out workpieces from a sheet iron plate, the sheet iron plate is fed at first to a stamping and/or nibbling station in which stamping and nibbling operations ar executed. The sheet iron plate premachined in this way is then fed by means of transportation and buffer devices to a laser beam cutting machine in which longer, more complicated contours are cut out and the workpieces are cut out free from the sheet iron plate. During all cutting processes by means of the laser beam, the sheet iron plate remains stationary so that no problems arise with the handling of the cut free workpieces and the residual grid. Both existing machines can machine independently from each other for special works or can be utilized together for the successive machining of the same sheet iron plate, whereby buffers serve to store the sheet iron plates when e.g. the cycle time of the stamping and nibbling machine is higher than the cycle time of the laser beam cutting machine. This provide for an independent, optimal utilization of the capacities at disposal of the machines.

Lightened steering wheel, in particular for a motor vehicle, produced from stampable, reinforced, synthetic materials and process for the manufacture thereof

Abstract: The steering wheel, except for its central metallic hub (11), is made from a synthetic material charged with long fibres which is used in the semi-manufactured product state in the form of blanks shaped by stamping in a mould where the blanks are preferably charged edgewise

Method of making reinforced material

Abstract: The invention relates to a fibre-reinforced thermoplastic semi-finished product includes a thermoplastically processible polymer and long individual reinforcing fibres which form a coherent skeleton, which product can be processed in stamping presses to give moulded articles having a very high surface quality and very good physical properties, and a process for producing this product.

Die stamping and punching tool

Abstract: The die stamping and punching tool has a press upper part (18) and a tool plate (16) and a press lower part (13) with a stamping or pressing table (14) and counterpressure plate (15), the lower part being carried by toggle levers (11, 11') which are moved by a cam mechanism. The controlled rollable stamping or pressing table (14) with the counterpressure plate (15) and rolling profile has a device for controlling the stamping table movement comprising toggle levers (11, 11') and cam disks (12, 12') driving the same, the cam disks (12, 12') having a shape (A,B) related to the rolling profile. The stamping table can be guided by a further cam disk (29). This controllable stamping table guide preferably comprises a table guide lever (28) pivotable about a fulcrum. One end carries a slider (27) sliding in the stamping table and the other end is driven by the cam disk (29), which also has a shape (C,C') related to the rolling profile.

Method of making complicated sheet metal parts, and device for carrying out the method

Abstract: Method of making complicated sheet metal parts in one, two or more operation/operations, at least one operation comprising a plurality of processing steps. The sheet-metal blank is placed on the tool and the pressure is then increased continuously up to, for example, 800 bar, passing through different pressure phases, in the first phase a continued flow of the material into the recesses of the form tool taking place and, in the subsequent phase, the forming blank being trimmed in an intermediate stage at relatively low points of the tool, the material flowing further into the recess, corners and undercuts. The pressure is then increased until the end phase and the workpiece then undergoes final stamping, final trimming, perforation and/or edging. The pressure is then reduced and the sheet-metal part removed. (Figure 3).

Method and apparatus to join thin plates lying one on top of the other together

Abstract: Method and device for connecting superimposed thin plates (4, 5) by means of a joining element formed from the material, which is separated from the plane of the plate by means of a stamping and / or deep drawing of plate portions (10, 11) by means of a stamp (1, 21, 26) and one Die (2, 3, 23 and 31, 32) can be obtained with subsequent squeezing of the plate parts, the plate parts (10, 11) engaging the punching or deep-drawing hole as a joining element being planed into the plate plane, so that no knobs after processing remain on the outer surface of the interconnected panels.

Sprocket-type strip feed

Abstract: Strip feeding mechanism intended for use in a stamping and forming machine comprises an intermittently rotated sprocket wheel (6) which is located adjacent to the operating zone of the machine in which the stamping and forming tooling is located. The strip material (2) is held against the periphery (10) of the sprocket wheel (6) by a retaining shoe (53) so that the sprocket teeth (12) will enter pilot holes (4) in the strip (2) and advance the strip during feeding intervals. During non-feeding intervals, the pilot pins (24) which are part of the stamping and forming tooling, will adjust the position of the strip (2) relative to the tooling performing the operation thereon. The construction of the biasing shoe (53) and the sprocket wheel (6) is such that the strip (2) is not firmly held by the feeding mechanism and can be moved by a very slight amount by the pilot pins (24) in order to position the strip (2) precisely in the operating zone.

Counterbalance spring retaining means for a roller door

Abstract: A spring retainer member of lightweight steel construction material formed in accordance with a method comprising the steps of die stamping a square blank of steel construction material, notching out triangular shapes at each of the midpoints between the four corners of the square blank to form between adjacent notches four radially oriented arms extending at 90 degrees to each other, die stamping a shaft-receiving hole centrally of the blank for the subsequent projection therethrough of a shaft, forming in an initial shaping step a cylindrical shape in the blank in the area of the shaft-receiving hole, and forming in a subsequent shaping step a completed cylindrical shape by bending the four arms into adjacent position to each other incident to closing the previously removed triangular shaped notches, whereby the resulting spring retainer member is adapted to be disposed on a shaft of an overhead door mechanism and attached to an end of a counterbalance spring and to a drum support of the overhead door mechanism.

Commercial scale production of Fe-6.5 wt. % Si sheet and its magnetic properties

Abstract: Commercial scale production of a Fe‐6.5 wt. % Si sheet has been successfully developed. Presently manufactured sheets are in coil form, whose thickness ranges from 0.1 to 0.5 mm with a maximum width of 400 mm. Magnetic properties of the manufactured sheet have been investigated. The permeability of Fe‐6.5 wt. % Si sheet is about 10 times higher than the conventional nonoriented silicon steel sheet. The core losses are less than half the conventional, and even less than that of the grain‐oriented silicon steel sheet at frequencies over 400 Hz. Superior soft magnetic properties are attributed to the low magnetostriction and high electric resistivity of this alloy. It is well known that the Fe‐6.5 wt. % Si alloy has poor ductility in conventional mechanical work. But investigation of the forming conditions has enabled the stamping and bending of alloy sheets. Low core losses and high permeability make Fe‐6.5 wt. % Si sheet adequate for motor cores, transformer cores operating at high frequencies, and magnetic shielding. Application to the micromotor core shows that Fe‐6.5 wt. % Si sheet reduces the consumption of no‐load electric current by 25% in comparison with the conventional silicon steel.

Device for embossing different die stamping signs in a rolled steel section

Abstract: In order to be able to adjust the die stamping characters (15) in a device for embossing die stamping characters (15) in a rolled steel section with a punch head (2) which can be rolled off on the rolled steel section, there are provided for the die stamping characters (15) character bearers (14) which are mounted rotatably in the punch head (2) and each have a set of different die stamping characters (15) at a given angular distance relative to their bearing axle (13).

Slug retainer for the die assembly of a stamping and forming machine

Abstract: Slug retainer for the die assembly of a stamping and forming machine comprises a thin sheet of resilient metal which is on the rear end of the removable portion of the die assembly. Slugs produced by the punch and die are pushed through a slug passageway in the die assembly and through a slug opening in the sheet. The metal sheet has an integral ear which bears agains the endmost slug and which is flexed when the endmost slug is ejected. Slugs are thereby prevented from spilling when the removable portion of the die assembly is removed.

Resin bonding apparatus

Abstract: PURPOSE:To obviate the need of complicated control of a stamping head, by providing a stamping table such that it is movable along a line extended in the same direction as stamping pins are conveyed. CONSTITUTION:A stamping table 50 is movable by a cylinder and a motor for example, along a line extended in the same direction as stamping pins 10 are conveyed. A stamping head 110 has a plurality of stamping pins 10 for each chip size and is moved reciprocally over a specific distance in specific positions, namely between a point on a stamping disc 4 and a point on a substrate. When the stamping table 50 is moved along the extension in the same direction as the pins 10 are conveyed, the head 110 is required to move only between the specific points, the point A on the substrate 1 and the point B on the stamping disc 4. Accordingly, a tact time can be decreased by a simple mechanism and complicated control of the head 110 can be obviated.

Punch stretching of sheet metal and differential equations on manifolds

Abstract: The goal of mathematical modelling of sheet metal forming processes is to provide predictive tools for use in the design of stamping processes and the selection of sheet materials. Most current approaches to finite element modelling of large deformation, elastic–plastic sheet metal forming problems use a rate form of the virtual work (equilibrium) equations, and a single-field finite element representation of the displacement components. Called the incremental method, this approach does not produce approximations which satisfy the discrete equilibrium equations at all times, and consequently it demands small time steps to insure stability and numerical accuracy. This paper describes a variant of the mixed method in which displacements, stresses, effective strain and pressures are all given separate finite element representations. The equilibrium equations in non-rate form are discretized to produce a system of algebraic equations which are coupled with the constitutive equations and then integrated using state-of-the-art numerical software. When used to model rate sensitive sheet materials in hydrostatic bulging, plane strain punch stretching and hemispherical punch stretching, the new approach proved to be between 6 and 26 times as fast as the old incremental method.

Improvements relating to metal slitting and stamping.

Abstract: The invention makes use of the controlled, differential application of heat to effect dimensional control in the slitting or stamping of metal workpieces. In a principal embodiment (Fig. 1), a metal strip (40) supplied from a reel (2) is slit into narrower strips by a slitting mechanism (12,13) and the slit strips (41) are reeled up separately (at 23). A controllable heating apparatus (8, 9) is provided before the slitting mechanism (12, 13) and is arranged to effect heating of the strip (40) in a controlled manner which varies across the width of the strip (40) to compensate for variable tension in the strip across its width. Other applications of controlled, variable heating are also described.