Showing papers on "Stamping published in 1992"

Thermal annealing of palladium alloys

Abstract: This invention is concerned with production of electrical devices comprising an electrodeposited conductive region free from cracking defects. In the production of a contact portion of the device from a metal strip electroplated with a conductive stripe of an alloy, the stripe exhibited, upon stamping and forming operation, cracked areas. Typically, the stripe coating on the metal strip, such as a copper bronze material, includes a layer of nickel, a layer of palladium alloyed with nickel, cobalt, arsenic or silver, and a flash coating of hard gold. The cracking defects were eliminated by subjecting the plated strip to an annealing treatment prior to the stamping and forming operation. After the heat-treatment, the stripe was free from cracks and separations between the successive layers.

Cross bar transfer press.

Abstract: A mechanical transfer press employs a plurality of paired self-supporting, stroke doubling transfer/feed mechanisms, with each pair of transfer/feed mechanisms coupled to a cross bar, for sequentially transferring piece parts to a series of stamping stages in the press. Vacuum cups attached to the cross bar engage one or more piece parts for transferring the piece parts to the next stage. Each transfer/feed mechanism includes a lift/lower drive as well as a feed/return drive for positioning piece parts intermediate upper and lower dies of the press and for removing the cross bar and vacuum cups from the stamping stage prior to the stamping operation. Each pair of transfer/feed mechanisms is positioned above its associated stamping stage to facilitate access to and increase clearance from the dies. Each pair of transfer/feed mechanisms with its associated dies forms a press module which can be easily removed and replaced as well as individually adjusted in its feed/return and lift/lower distances and motion profile independent of other such modules. A programmable numeric controller is used to control press as well as transfer/feed mechanism operation.

Numerical modelling of sheet metal forming problems

Abstract: Stamping of sheet-metal parts by means of punches and dies is a standard manufacturing process. However, despite its broad application in industry, the design of forming processes is still largely based on experimental techniques, such as the use of circular grid systems (Keeler 1968) or forming limit diagrams (Hecker 1973, Keeler 1974).

Method and apparatus for stamping plastic articles such as soap bars using elastomeric sheet separators

Abstract: A method and apparatus for stamping a blank of plastic material, such as a soap blank, into a shaped article, such as a soap bar. The apparatus and method uses a pair of mating die halves spaced apart from one another in order to receive the blank of plastic material. Thereafter, the blank of plastic material is stamped and shaped by closing the die halves so they are mating. The die halves are then opened so as to discharge the shaped article and receive a new blank of plastic material. The present invention contemplates placing an elastomeric septum across each die half between the blank and the die half so as to prevent plastic material from sticking to the die halves after stamping. It has been found that a septum made from latex works well.

Method and apparatus for setting flat elements in relation to a reference device, in particular stamping dies or the like

Abstract: In a method of setting flat elements in relation to a reference device, in particular stamping dies or the like, and for aligning embossing blocks relative to an embossing original outside a stamping machine by means of a camera and picture screen associated therewith, the camera position is set over a holding frame and a marking at one side of the holding frame and displaced until the image of the camera on the picture screen is coincident with a line of a reticle, whereafter the camera is moved over a second marking, which is approximately aligned with the first marking, at the other end of the holding frame and then the rear part of the holding frame is displaced at a right angle to the first direction of travel until the image of the second marking on the picture screen is coincident with that reticle line. In addition the stamping die is to be enclosed and parallelism is to be set relative to the first direction of travel by way of the reticle line; after setting of the stamping die, the embossing original is arranged over same, using a carrier plate provided with markings.

Method of forming an automotive wheel

Abstract: An automotive wheel and a method for manufacturing, in which a center hub is formed using drawing and stamping methods, is disclosed. A mounting foot is spin forged onto the edge portion of the formed center hub, and the center hub is then polished and mounted into a separately formed cylindrical rim. The resulting automotive wheel has the look of a machined billet-type automotive wheel but with a substantial reduction in wasted material and corresponding cost.

Cutting tool for stamping sheets - includes two relatively movable upper and lower parts with punches and associated dies for stamping outer edge and openings of blanked part

Abstract: A cutting tool (esp. for automatic blanking and nibbling machines), for stamping sheet (1) to produce a blanked part (2) with one or more openings (5,6,7), has two relatively movable upper and lower parts (15,16) with punches (29,30,31,51) and associated dies (47,48,49,35) for stamping the outer edge (4) and the openings (5,6,7). The novelty is that (a) punches (29-31) and dies (47-49), corresponding to the number, shape and arrangement of openings (5-7), are provided on the upper part (15) and lower part (16) respectively; and (b) an outer punch (51), corresponding to the outer edge (4), is provided on the lower part (16) and an associated die (35) is provided on the upper part (15). Pref. the tool incorporates an ejector arrangement (36,55) of hard elastic plastics, esp. polyurethane. An elastic body (36) is provided on the upper tool part (15) within the die (35) for the outer edge (4) for accommodating the punches (29-31) forming the openings (5-7), the body (36) projecting beyond the punches in the direction towards the lower tool part (16). An ejector (54) surrounds the outer punch (51) of the lower tool part (16) and is mounted for displacement against an ejector spring (55) which is of softer material than the elastic body (36). ADVANTAGE - All the burrs, at the outer edge and the opening edges, occur at one side of the blanked part.

Device for overload protection and braking of a machine part driven by a motor

Abstract: A device for overload protection and for braking a machine part driven by a motor ( 2 ), in particular, a tool driven by a cam gear in a stamping and/or bending machine, comprises a module ( 3 ), an overload clutch ( 4 ) disengaging after exceeding a torque threshold, and a freewheel ( 6 ) which, during the braking of the drive shaft ( 1 ) blocks in the direction of drive, each being arranged on the drive shaft ( 1 ) behind one another in the drive line extending from the motor ( 2 ) to the machine part.

Device for stamping materials in sheet form, especially sheet metal blanks

Abstract: A device is provided for stamping materials in sheet form, especially sheet metal blanks (5), on a single-acting press The device includes a cushion (2) made from an elastic material, forming a punch and housed in a retention dish (1) and means for preforming and permanently forming the sheet metal blank (5) The preforming and permanent forming means are arranged in a die (6) including a framework (8), an upper peripheral blank-clamp (9) connected to the framework (8) by at least on elastic member (11) for reaction, strain relief and retention and a die bottom (10) arranged in the upper peripheral blank-clamp (9) The upper peripheral blank-clamp (9) and the die bottom (10) are mounted so as to slide relative to one another and include means (13) for instantaneously linking them together

Method and device for assuring orderly web travel in a folder by punching holes in a paper width direction

Abstract: A method of assuring orderly web travel in a folder includes stamping out of a layered structure formed of mutually superimposed web surface portions, along respective strips thereof, a plurality of tongue-like elements remaining appendant to the web surface portions and projecting through respective holes simultaneously stamped out of the web surface portions so as thereby to hold the web surface portions together at the respective strips thereof; and a device for performing the method.

Vehicle armrest with enhanced load support

Abstract: An automotive vehicle armrest is formed in a cup-like configuration as a unitary metal stamping. The armrest armature includes an upper, load supporting wall from which depends a peripherally continuous sidewall. Elongated depressions are formed in the load supporting wall to define a truss-like configuration to enhance the load supporting capability of the armrest.

Carrier, method of manufacturing and use therefor

Abstract: A component carrier (20) and method of manufacture and use includes stamping and forming of a metallic sheet metal strip with adjacent component holders (24, 36) each being formed by beams (26,38) defined by slots (30-34) arranged to grip components (12) for handling and transport; the beams being offset each from the other to allow deflection in the plane of the beams; and with several embodiments including slots arranged to produce a controlled deflection and receive components of differing cross-sectional areas. The invention method embraces forming the slots by a tool of V-shaped cross-section following the punching of a round hole in the metal strip. Extending the slots (30-34) into the strip base (22) facilitates loading of the carrier by controlling beam spreading.

Impression press for embossing cardboard - has identical toggle linkages at opposite sides operated in synchronism by rams or spindles

Abstract: The impression press is for cardboard sheets in particular, to be stamped out or embossed in an automatic machine. A stamping plate on a stamping tool accommodating the sheet has a closing frame resting on supports on the press frame. There are a bottom pressure plate and a top cover plate. The pressure plate (6) forms with the stamping plate (7) and frame (8) a unit extending for the full length and width of the press. this is pressed upwards against the fixed cover plate (21) with alignment and support plates (12, 17) for the impression operation. Toggle linkages (32, 33) at the sides between pressure plate and press frame (1) have arms (35,36) extending vertually upwards when extended, and are actuated by horizontal rams (39, 40) or spindles (39, 40). They and the rams or spindles are identical and on opposite sides, working in synchronism to press the unit evenly against the cover plate over the entire surface area. USE/ADVANTAGE - Cardboard impression press is simple and gives minimum power consumption.,

Method of manufacturing a knife blade

Abstract: The method of manufacturing the knife blade (1), comprises the following steps: by stamping the two faces (1a, 1b) of a blade blank (1), a series of protuberances (2, 3) are formed, extending transversely to the length of the blade and, during the same stamping operation, a chamfer 4 and ridges 6, 7 are formed on one of the longitudinal edges of the blade, after which, said edge (5) of the blades opposite the chamfer is sharpened. Use especially in order to avoid the blade sticking when cutting food.

Waveguide for microwave ovens

Abstract: Waveguide adapted to be mounted on the wall 1 of a cooking chamber between the antenna 2 of a magnetron 3 and an opening 5 provided in the wall 1, and comprising a metallic housing of generally tubular shape formed from a cover 7 comprising an upper elongated wall 8 of which a forward region extends above the wall 1 and of which a rear region extends above the magnetron 3, two side walls 9 and 10, two transverse forward 11 and rear 12 walls, and a base 13 comprising a bottom wall 14 traversed by a hole 16 for passage of the antenna 2 and opening opposite the opening 5. The cover 7 is formed from a single piece obtained by stamping and bending a metal sheet. The invention is applicable to microwave ovens for household use.

Semiconductor device, method of forming bump electrode of a semiconductor device, method of packaging a semiconductor device, chip carrier tape, display device and electronic printing device incorporating the semiconductor device

Abstract: A bump electrode of an inexpensive and reliable semiconductor device is provided in which a remaining metal wire portion produced during bump electrode formation is eliminated. The remaining metal wire portion made in a bump electrode forming method for a semiconductor device using a wire bonding technique is pressed and reshaped from above with heat or ultrasonic waves so as to apply pressure and heat to the bump electrode by using a stamping tool.

Process for decorating or marking a surface by means of laser radiation and use of a stamping foil in this process

Abstract: A process for decorating or marking a surface by means of laser radiation is proposed, in which at least the upper or first layer of coloured lacquer to be deposited by means of the laser beam is applied to the surface in a transfer process, in order to achieve a uniform thickness of this layer of coloured lacquer and consequently achieve a very uniform gravure. Furthermore, the use of stamping foils, in particular hot-stamping foils, of a particular design is described in the case of such a process.

Production line for sheet metal shuttering for concrete - has stamping, folding and welding machines arranged in line

Abstract: The production line for producing sheet metal shuttering for concrete structures, has a first machine (3) in which a flat sheet of metal (1) has metal removed from its corners (1a) and a row of holes (1b) stamped out near its long edges, and a location recess is stamped out of each short edge. The sheet is moved with a stepwise motion to the folding press (4) where the edges are folded upwards at right angles. The sheet can be rotated about a vertical axis to align each edge in turn with the folding machine. The workpiece is then transported to the welding station (2). USE/ADVANTAGE - Production of sheet metal shuttering by a low cost manufacturing method.

Metal part stamping, bending and/or pressing method - using machine with ram whose height can be applied during operation according to measurement of product by video camera and image analyser

Abstract: In the method a machine is used contg. a ram (3) and a counter tool (4) with which it works. The height of the ram can be adjusted during operation of the arrangement. An arrangement measures the metal part processed by the machine and adjusts the height of the ram depending on the achieved measurement result and a stored desired measurement value. The measurement arrangement can be a video camera with an image analyser. ADVANTAGE - Is easily adpated for different product specifications.

Effect of alloying elements on response of nonoriented electrical steels to stamping operations

Abstract: A suitable alloying design for improving the punchability of nonoriented electrical steels containing 0.1 % Si was investigated. The appropriate addition of sulfur to steels containing relatively high manganese content is very useful in obtaining good punchability without detrimental effects on magnetic properties.

Processing machine for processing wire and strip stock or for assembling components

Abstract: A stamping and bending machine comprises a drive housing with a drive housing visual wall and two drive housing face walls. From each of the drive housing face walls projects at least one housing box. Processing devices are attachable to the housing boxes. A distributor gear is provided within the drive housing. Each of the housing boxes accommodates a housing box shaft drivingly connected with a distributor gear and with the processing devices.

Method of producing safety labels - involves sticking strip of hard magnetic metal and silicon paper onto support film and punching holes before sticking light magnetic strip and laminating before final label stamping

Abstract: A hard magnetic metal strip (5) is glued to the support film (1) and a layer (6) of silicon paper is laid on top of the strip. The film, with strips, is then passed through a hole punch (7) which makes evenly spaced holes in the metal strip. The silicon strip is then removed from the hard metal strip onto which a soft magnetic porous metal band (9) is stuck. The final strip (10) is then laminated with film (12,13) and individual labels (14) are then stamped out (11). ADVANTAGE - The strip of hard magnetic material is cut exactly on the support film so there is little chance of over or under cutting.

Device for clearing rag of friction welding

Abstract: The utility model discloses a device for clearing welding rags directly during the welding cycle process. The utility model is composed of a push action cylinder, a mobile clamp device, an annular inner stamping knife, an annular outer stamping knife, a pressboard, a stamping knife frame, a forked supporting base, and a connector; the utility model is characterized in that the forked supporting base is fixed to the main shaft box or the machine body of a welding machine; the knife frame is arranged on the forked supporting base, and the outer stamping knife is arranged in the stamping knife frame; the center line of the outer stamping knife accords with the center line of the main shaft of the welder, and the inner stamping knife is fixed to a knife bar; the knife bar is concentrically installed together with the main shaft of the welding machine. As the device can be used to complete multiple processing procedures in the same cycle time, the production efficiency of the welding components can be enhanced.

Electronic surface mounted device mfr. - using only lead frame stamping out and housing moulding stations dependent on size of device being mfd.

Abstract: The method allows a lead frame to be stamped into sections (33) dependent on the size of the required surface mounted devices, before enclosing each of the successive sections (33) in a plastics housing via an injection moulding process. The latter is performed using linear rows of lead frame sections, the obtained housings then being separated before cutting to provide the side leads and bending of the obtained leads into the required shape. The displacement of the sections (33) after separation is not dependent on the housing size, so that only the first part of the mfg. line has to be modified for mfr. of different size devices. USE/ADVANTAGE - E.g. for just-in-time prodn. line. Allows use of universal machine group for mfr. of wide range of different device sizes.