Abstract: There is provided a resistance spot welding apparatus including a first rod-shaped electrode body, second rod-shaped electrode body, first ring-shaped member, second ring-shaped member, first elastic body, and second elastic body. The first rod-shaped electrode body and second rod-shaped electrode body are arranged facing each other, the first rod-shaped electrode body is inserted into a through hole of the first ring-shaped member, the first elastic body is connected to an opposite side of first ring-shaped member to second rod-shaped electrode body side, the first rod-shaped electrode body and first ring-shaped member are not electrically connected to each other, the second rod-shaped electrode body is inserted into a through hole of the second ring-shaped member, the second elastic body is connected to an opposite side of second ring-shaped member to first rod-shaped electrode body side, and the second rod-shaped electrode body and second ring-shaped member are not electrically connected each other.

Abstract: A resistance soldering system includes a power input receiving an alternating current from a power source and a controller circuit generating a control signal indicative of a desired power level delivered for a desired time. The resistance soldering system further includes a silicon-controlled rectifier connected to the power input and the controller circuit and producing a control voltage proportional to the control signal and a transformer having a primary side receiving the control voltage and a secondary side having output leads configured to apply an output voltage to a solder joint disposed between the output leads. The controller circuit determines the control signal applied to the silicon-controlled rectifier required to melt the solder joint based on the desired power level and the desired time. The controller circuit controls the desired power level independent of the desired time. A method of operating a resistance soldering system is also presented.

Abstract: A weldable adhesive or sealant formulation comprising a plurality of discrete solid metallic portions within a material having a viscosity of greater than 10,000 Pa s in its green state and at room temperature.

Abstract: A rear SMC component is adhesively bonded to a central SMC component to form a cavity adjacent the rear wall that encloses a tapping plate. A reinforcing SMC component is adhesively bonded to the central SMC component with a rail portion against the top wall and a rear gusset portion against the rear wall. Conductive heaters are positioned directly against the surfaces on both sides of the adhesive for the rail portion but only on the interior side of the adhesive for the gusset portion, because the rear component blocks access thereto. As a result, the adhesive for the gusset portion is only partially cured by the heater. A gusset fastener is installed through the rear gusset portion and the rear wall and into the tapping plate to fixedly retain the rear gusset portion against the rear wall while this partially cured adhesive subsequently cures.

Abstract: A method for producing a medical electrode lead or a catheter, and also to an associated semifinished product. The semifinished product for this purpose includes a cable having at least one electrical conductor, which is embedded in a sheath made of an electrically insulating, thermoplastic material. It is characterized in that the cable, at least at one cable end, forms a connection point, via which the conductor can be attached permanently and non-detachably to further components, wherein part of the surface of the conductor is exposed in the region of the connection point and forms a contact face, and the sheath has, in the region of the connection point, a recess that is continuous in the longitudinal direction of the cable.

Abstract: Aluminum-base alloy workpieces have surfaces with films of aluminum oxide which inhibit good contact with weld faces of resistance spot weld electrodes and the faying surfaces of, for example, sheet workpieces stacked for welding. Sometimes, the surfaces of the sheets also are coated with an adhesive or a sealer which further complicates welding. But in accordance with this invention, weld faces of opposing, round, copper welding electrodes are pressed against opposite outside surfaces of the sheets at a spot weld site and weld current is applied to the electrodes in accordance with a three-stage weld schedule to better form each weld. The weld schedule comprises a Conditioning stage (stage 1), a weld nugget Shaping stage (stage 2), and a weld nugget Sizing stage (stage 3).

Abstract: In a conductive sheet using a metal nanofiber, metal migration in a visible conductive pattern is eliminated. Also, the intervals of the conductive portion (separate sheet terminal) are shortened. On a substrate (26) is a conductive sheet (10), formed from a transparent conductive pattern (11) and a visible conductive pattern (16). The transparent conductive pattern comprises a first nanofiber layer (12) that is a layer including a metal nanofiber, and a first heat-insulating layer (29) adjacent to the first nanofiber layer. The visible conductive pattern (16) forms an underlayer pattern from a second nanofiber layer (17) that is a layer including a metal nanofiber, and a second heat-insulating layer (27) adjacent to the second nanofiber layer; and a top-layer pattern comprising a paste layer (18) that is a layer including a metal paste laminated on the underlayer pattern. The second heat-insulating layer (27) is a conductive sheet that is a layer including a metal nanofiber cut to a minimum size.

Abstract: A multiple current sensor device or a multiple current shunt device includes at least two resistive sections comprising a first resistive section and a second resistive section, at least two connecting sections comprising a first connecting section and a second connecting section and a common connecting section. The first resistive section is electrically coupled in between the first connecting section and the common connecting section. The second resistive section is electrically coupled in between the second connecting section and the common connecting section. Using an embodiment may improve a trade-off between an efficient integration, a compact integration, a compact implementation and an accurate determination of at least one value indicative of at least one of multiple currents.

Abstract: Weld faces of electrodes for resistance spot welding are formed with a suitable area of protrusions and/or intrusions. The size, shape, and elevation or depths of the protrusions or intrusions are determined for the formation of suitable spot welds in and between metal workpieces such as aluminum or steel panels for vehicle bodies. The protrusions or intrusions are also conceived and used to form an image on at least a visible surface of the welded article to produce an attractive appearance on the surface of the welded sheet.

Abstract: A method and apparatus inspect a quality of an adhesive material used for joining a pair of work surfaces during a weld-bonding process. A pair of work pieces are at least partially bonded by a layer of the adhesive material, and the dynamic displacement of one or both electrodes is measured through a duration of the resistance welding process to determine relative moisture content of the adhesive. A control action is executed when the dynamic displacement exceeds a stored threshold value. The apparatus includes a welding device having a pair of electrodes for providing a clamping force and an electrical current necessary for forming the welded joint, a sensor for measuring a dynamic displacement of at least one of the pair of electrodes and/or another portion of the welding device during formation of the welded joint. A controller has an algorithm for determining a relative moisture using the dynamic displacement.

Abstract: A welding apparatus includes a first electrode tip; a second electrode tip opposing the first electrode tip; and an electrically conductive part which is provided so as to be freely interposed between the second electrode tip and a work and ensures electrical conduction between the second electrode tip and the work when the electrically conductive part is interposed between the second electrode tip and the work, the electrically conductive part including an electrically conductive member one side of which opposes the work with a presence of a void space from the work when the electrically conductive member is interposed between the second electrode tip and the work, and against which the second electrode tip is abutted on another side thereof, and a pair of electrically conductive abutment members which are provided integrally with the electrically conductive member in such a manner as to extend toward the work, and distal ends of which are abutted against the work, a position of abutment of the electrically

Abstract: A method for monitoring the presence of an adhesive between two metal workpieces includes measuring the depth of indentation made by electric resistance weld electrodes by measuring the advance of the weld electrodes, and comparing the measured depth of indentation with the depth of indentation that is known to occur when the presence of the adhesive between the metal workpieces minimizes the shunting of weld current and thereby affects the depth of indentation. If the adhesive is absent, a supplemental electric resistance weld is made to compensate for the absent adhesive. The invention is applicable to both adhesive bonding, where only adhesive is used to attach the workpieces, and weldbonding, where an electric resistance weld is made atop a layer of adhesive.

Abstract: The present invention is directed to improved weldable metal composites and methods. A metal composite structure (10) features two metal members (12) (14) sandwiching a viscoelastic layer (26) where the viscoelastic layer entrains electrically conductive particles (28) and a carbon extracting attractant layers (32) (34) to inhibit and/or prevent carbon migration and carbide formation during welding.

Abstract: The invention relates to a mixture for applying a polymer, non-corrosive, electroconductive coating which can be shaped in a low-abrasive manner, to a base. Said mixture contains at least one substance A in the form of electroconductive hard particles, at least one substance B in the form of very soft or soft, inorganic, sliding, electroconductive or semiconductive particles, and/or at least one substance C in the form of metallic, soft or hard, electroconductive or semiconductive particles and/or soot, and optionally other constituents such as an anticorrosion pigment D, the sum of the parts by weight of the inorganic sliding particles B and the metallic particles and/or soot C amounting to between 0.25 and 99.5% of the parts by weight of the water-insoluble or only slightly water-soluble pigmentation S (A+B+C), and the size of the electroconductive hard particles A amounting to less than 10 ?m in relation to the particle size transfer value d99.

Abstract: The invention relates to a mixture for applying a thin polymer, especially less than 6 ?m, non-corrosive, electroconductive or semiconductive coating which can be shaped in a low-abrasive manner, to a base.

Abstract: A synthetic material is applied to a structure of an article of manufacture such as an automotive vehicle. Typically, the material assists in or at last does not interfere with manufacturing steps applied to the article of manufacture.

Abstract: A connecting structure in which the electric cable having an insulated coating and the electrically conductive member with non-insulated coating are connected through a connecting terminal having a junction support member by applying an electric current, heating and applying a pressure; and the electric cables having an insulated coating and are connected mutually to one another through a connecting terminal having an electrically conductive member with non-insulated coating and a junction support member by applying an electric current, heating and applying a pressure, and a connecting method in which those connections are established by applying an electric current, applying a heat and applying a pressure, and a rotating electric machinery having that connecting structure and an alternating current generator using this machinery.

Abstract: A film-coated wire is wound around a terminal at least one turn and pressed by an upper electrode of a resistance welding machine. A current is passed through the upper electrode when the wire is pressed, and heat is produced. The heat melts a film on the wire. The current is passed between the upper electrode and the lower electrode via the wire and the terminal to connect the wire with the terminal by resistance welding. A contact area between the wire and the terminal is increased by winding the wire around the terminal. Therefore, the wire is less likely to shift its position when a force is applied by the upper electrode. This increases reliability of the connection. Moreover, the terminal is reduced in size because it is not required to be formed in a U-shape.

Abstract: A stud welding device (1) with a stud holder (3) having a pointed region (2) for holding a weld stud (4) and a device (5) designed as an insulating spacing means with a rim (7). The pointed region (2) of the stud holder (3) always remains behind the rim (7) of the spacing means, thereby preventing electrical contact between the pointed region (2) and a component (6). The stud welding device (1) is reduced in size because it is formed without a support foot.

Abstract: This invention deals with a spot electrical welding machine which is technically applied to the electronics industry and micro-electronic industry. A spot electrical welder optimally directly welds enameled wires, fine wires or relevant thin sheets of metal, and metal tapes with &PHgr; 0.02 mm-&PHgr; 0.80 mm. This spot electrical welder comprises of an electrode, a main processor which functions as a power supply control, and a weld head which is composed of an electrode clamp and an adjusting device of electrode force. Due to the special structure of the electrode's tip which has a certain resistance Ohm contact, the main processor circuits provide for a proper work current while wedding enameled wires and further eliminates the need for insulation by hand. In addition, the spot electrical welder makes weld points even and steady, allows for simple and convenient operation and lowers welding time.

Abstract: An electroacoustic transducer 1 includes a base 24 made of a magnetic material, a magnetic core 22 made of a magnetic material and erected on the base 24, and a diaphragm 20 made of a magnetic material and supported with a space distanced from the top end of the magnetic core 22. The base 24, the magnetic core 22 and the diaphragm 20 form a magnetic circuit. The electroacoustic transducer 1 includes a magnet 25 supplying a static magnetic field, and a coil 23 supplying an oscillation magnetic field to the magnetic circuit. A lead wire 23a (23b) of the coil 23 and a connection land 50a (50b) are electrically connected by resistance welding or thermal welding with the lead wire 23a (23b) held between the connection land 50a (50b) and a cover member 52a (52b).

Abstract: A film-coated wire is wound around a terminal at least one turn and pressed by an upper electrode of a resistance welding machine. A current is passed through the upper electrode when the wire is pressed, and heat is produced. The heat melts a film on the wire. The current is passed between the upper electrode and the lower electrode via the wire and the terminal to connect the wire with the terminal by resistance welding. A contact area between the wire and the terminal is increased by winding the wire around the terminal. Therefore, the wire is less likely to shift its position when a force is applied by the upper electrode. This increases reliability of the connection. Moreover, the terminal is reduced in size because it is not required to be formed in a U-shape.

Abstract: An end portion of a coil wire is wound around a coil terminal to form a wound portion. Then, air is supplied to the wound portion. While the air is supplied to the wound portion, heat is supplied in a first stage to the coil terminal, and thus a heat resistant coating of the coil wire is burnt and is removed from the coil wire located in the wound portion. Thereafter, heat is supplied in a second stage to the coil terminal, and thus a protrusion of the coil terminal is melted to join the coil wire and the coil terminal to each other at the wound portion.

Abstract: To provide a strip connecting apparatus and a method therefor which are less costly, short in welding time and high in welding quality. A strip connecting apparatus is provided with: a surface coating removing device for removing insulative surface coating of end portions, to be welded, of a leading strip and a trailing strip before cutting the strips; a cutting device for cutting the end portions, to be welded, of the leading strip and the trailing strip; and a welding device for overlapping the cut end portions of the leading strip and the trailing strip and seam welding the cut end portions with each other.

Abstract: A method and apparatus of making an electrical bobbin including applying to the wire/terminal assembly fusing pressure and heat. Sensing the temperature of an electrode zone near one of its fusing surfaces, and controlling the application and cessation of fusing power in response to the zone temperature values. Power application can cycle on and off for a set time period, number of set cycles, or stopped in response to another event such as sensed electrode displacement reaching a set value. Various other control parameters are or can be employed. The electrodes are preferably high resistant material and no significant current flows between upper and lower electrodes.

Abstract: A method and apparatus of fusing a pin to a wire to reliably form a good quality fusion joint includes placing the pin and insulated or uninsulated wire in a notch of a lower fusing electrode so that the pin is spaced a predetermined distance above the wire. The upper fusing electrode applies fusing current and heat symmetrically to the pin and notch side walls and the portion of the lower electrode beneath and in contact with the wire. Heat is transferred to soften the pin and burn or vaporize the insulation off the wire before the pin and wire touch. Since all parts are held symmetically, parts can not skew or burn off un evenly. Electrode pressure builds to drive the soften, heated pin and wire together and to apply fusing current through the contacting pin and wire to form a good fusion joint. Another aspect of the invention includes forming the lower fusing electrode with a plurality of fusing notches to afford quick operator set-up and sequential, automatic fusing of the series of wire/pin assemblies.

Abstract: The invention relates to a method for welding a double layer sheet metal (1, 2) having an intermediate layer (5), in particular, a sheet metal with knobs, with a bonding sheet metal (8) by spot or roll seam welding. Before welding of the bonding sheet metal (8) with the two cover sheet metals (1, 2), spaced apart by the intermediate layer (5) of the double layer sheet metal, is carried out, the area (11) about the welding location (12) is burned free of the intermediate layer (5) by the current which is introduced over a large surface area into the cover sheet metals (1, 2) via the welding electrodes (9, 10) placed thereat and guided via a shunt adjacent to the welding location (12). Only thereafter, the sheet metals are brought into conducting contact with one another by a directed local pressure application, and the welding process is carried out.

Abstract: After the initiation of a first current-supplying time an insulator of a coated wired W1 cuts off an electrically conductive path and hence a secondary current I2 for melting and removing the insulator is caused to flow from an upper electrode 20 by way of an intermediate electrode 26. An interior conductor is exposed to form an electrically conductive path leading to workpieces (W1 and W2) between the upper electrode 20 and a lower electrode 22, allowing a branch current IB to flow into the lower electrode 22. A control unit monitors a current detection signal <IB> from a current detecting circuit 34. When the signal <IB> has reached a skip level SK, the control unit terminates the supply of current of a first current-supplying time and initiates the current supply of a second current-supplying time for joining the wire W1 to a terminal member W2.

Abstract: A method of electrically welding a part such as a bolt around a bore of a composite sheet comprising an intermediate layer of a substantially insulating material disposed between two metal layers. Said sheet is pre-heated in the vicinity of said bore in order to remove said substantially insulating material therefrom, after which said part is welded onto said sheet by a conventional resistance spot welding method. Preferably, said pre-heating operation is conducted by passing an electric current between a counter-electrode applied to the sheet from the same side as said part to be welded, in the vicinity of said bore, and an electrode applied on said part to be welded.