Abstract: This invention is intended to secure a fused area which is as large as possible in fixing a flanged bolt in position by projection welding. A welding method characterized by forming a flange 3 with a flat bulge 4 having a crest 5 and enlarging the melting starting at the crest 5 throughout the bulge while pressing the crest 5 against a mating member 7. And the flange and the mating member are strongly clamped between a fixed electrode 6 and a movable electrode 8. As for the shape of the bulge, it may be tapered, spherical or the like. Further, the diameter of the bulge 4 is set so that it is greater than the diameter of the bolt stem 2.

Abstract: Two pieces of steel strip are welded together by a method employing projection resistance welding. A portion of one strip is formed with a series of aligned projections and arranged in superimposed relation with a portion of the other strip. The superimposed portions are moved through a welding zone located between upper and lower electrodes, typically a pair of rotatable welding wheels, through which a continuous electrical current flows. As the projections move into and through the welding zone, they are heated, flattened, melted and welded to the other of the two superimposed portions. The projections may be in the form of a continuous, elongated ridge (when the steel strips are uncoated) or in the form of spaced apart dimples (when the steel strips are coated or uncoated).

Abstract: A spark plug for an internal combustion engine is provided with a fine wire platinum firing tip. The platinum tip is preformed in a rivet before being welded to the center electrode during manufacture of the spark plug.

Abstract: A capacitor discharge process for welding a braided cable formed from a plurality of individual cable strands to a solid metallic electrically conductive member comprises the steps of: (a) preparing the electrically conductive member for welding by bevelling one of its end portions while leaving an ignition projection extending outwardly from the apex of the bevel; (b) clamping the electrically conductive member in a cathode fixture; (c) connecting the electrically conductive member clamped in the cathode fixture to a capacitor bank capable of being charged to a preselected voltage value; (d) preparing the braided cable for welding by wrapping one of its end portions with a metallic sheet to form a retaining ring operable to maintain the individual strands of the braided cable in fixed position within the retaining ring; (e) clamping the braided cable and the retaining ring as a unit in an anode fixture so that the wrapped end portion of the braided cable faces the ignition projection of the electrically cond

Abstract: A wiper apparatus is disclosed in which a wiper linkage includes a pivot lever connected to a pivot shaft of a wiper arm for wiping a windshield glass of a vehicle, a pivot holder for supporting a pivot shaft, a link rod rotatably connected to the pivot lever, and a crank arm rotatably connected to the link rod. A wiper motor rotates the crank arm and moves the link rod reciprocatively. An elongated supporting pipe is fixed to the vehicle and supports the wiper linkage. A holding member holds the wiper motor to the supporting pipe. The holding member includes a mounting member to which the wiper motor is mounted and a fixing member for fixing the mounting member to the supporting pipe. The fixing member has a plurality of protruding portions which are elongated in a longitudinal direction of the supporting pipe on the inner periphery of the fixing member facing the supporting pipe. Also, each of the plurality of protruding portions provides a weld portion between the fixing member and the supporting pipe.

Abstract: Projection welding is used to join a needle guide member and a valve seat member together preparatory to their assembly into the nozzle of a fuel injector. Various embodiments are disclosed, including various ways for creating the projections. In the preferred embodiment the projections on the end face of the guide member are made my forming a small holes in the frustoconical surface of the guide plate. As the tool is used to form the small holes in the guide plate, the material of the guide plate is displaced creating small projections from the frustoconial guide surface.

Abstract: A part is kept on standby so that it can be reliably held by a feed rod. An auxiliary feed rod is provided with an arrangement for holding a part at a fixed position in advance. The part is stopped on the advance and retraction axis of a main feed rod by the advance movement of the auxiliary feed rod where the part transferred and is held on the main feed rod.

Abstract: A preformed assembly is provided for the replacement of a thermally stressed portion of a unitary water cooled closure element, e.g. made of plain carbon steel, of a furnace system which includes a steel frame to which is pre-welded a copper covering plate, the steel frame being welded into a closely fitting cut-out in the closure element, e.g. a furnace roof or furnace shell.

Abstract: A base assembly and method of forming the base assembly for a lamp includes an annular eyelet having an axially outward extending protrusion. The lead wire is fed through the eyelet and folded across the protrusion while a contact member sandwiches the lead wire and confines it during a welding operation. The eyelet, contact, and lead wire are thus fusion bonded to provide a solder-free connection.

Abstract: A welding method and apparatus in which a hollow positioning guide pin (7) is installed upon an electrode (8) to project through an aperture in a plate (1), whereupon a flanged elongate or slender part (4) is inserted in the guide pin, and as another electrode (15) presses the flange, the guide pin is withdrawn from the aperture.

Abstract: Two solid copper pieces are assembled by welding without filler metal. The pieces both have a projection which are placed facing and in contact with one another, before the pieces to be assembled are placed on the welding press. Welding is performed by passing a very high intensity current for a short period of about one tenth of a second under very high pressure. The welding operation prevents any annealing of the copper.

Abstract: In a crop shear apparatus disposed in a conveyance passage in which band steel is conveyed from a first rolling mill to a second rolling mill of hot rolling equipment, the crop shear apparatus including: at least one shear blade for shearing the band steel in a widthwise direction conveyed from the first rolling mill to the second rolling mill; and a supporting mechanism for movably supporting the at least one shear blades in the widthwise direction of the band steel, wherein the at least one shear blade is present in a non-linear manner along the widthwise direction of the band steel such that a projection quantity of the band steel in the conveyance direction at a sheared end portion can be adjusted when the band steel is sheared in a state where the blade has been moved in the widthwise direction of the band steel and the shear blade is formed into a non-mirror-symmetrical shape on two side portions of a portion which corresponds to the center in the widthwise direction of the band steel, a projection quan

Abstract: A ceramic guide pin having a guide portion, wherein at least the guide portion has a surface so shaped, microscopically, that top portions of outwardly projected portions of the surface are in the shape of gently curved surfaces. The ceramic guide pin can be produced by a process which comprises the steps of preparing a shaped body of a ceramic guide pin by forming or machining in dimensions calculated from the desired finished dimensions and a firing shrinkage allowance factor, sintering said shaped body, and subjecting the sintered body to barrel polishing.

Abstract: A flat-type electric wire is spot-welded to a connector terminal while the connector terminal is pressed by a pressing plate with a predetermined pressing force, so that stable spot-welding is always performed.

Abstract: A locating pin for positioning weld nuts relative to sheet metal pieces. The locating pin includes a heat and wear resistant ceramic base having a central opening. The locating pin also includes a heat and wear resistant elastomeric tip attached to the base by a shaft depending from the tip into the central opening of the base. The ceramic and elastomeric materials provide the locating pin with an electrically non-conducting characteristic.

Abstract: An electrode for a projection welding machine having a parts receiving hole is characterized in that a heat insulating element of magnetic material extending to the inlet side of the receiving hole is connected to a magnet disposed in the receiving hole and that the magnet itself is positioned adjacent a cooling hole.

Abstract: A manufacturing process of an offset-type fuel delivery rail assembly for an internal combustion engine. The offset-type assembly features offset distances between an axial centerline of an elongated conduit and those of tubular sockets for receiving fuel injectors. The process comprises the steps of clamping a conduit with a chucking tool, lowering a cutting blade onto the conduit to form arcuate edges corresponding to outside curvatures of tubular sockets, attaching the tubular sockets to the arcuate edges of the conduit by spot welding, and then brazing or welding around the arcuate edges to form an integral assembly. The cutting blade is formed into a solid circular configuration having an oblique plane. The cutting blade may be provided with a pair of longitudinal slots in order to form projections for concentrating electrical current during spot welding.

Abstract: A steering column bracket assembly for a steering column of a vehicle body includes a filled polymeric plastic modular unit carried by the vehicle body having a U-shaped beam with an inner surface and an outer surface and a panel. The panel and the U-shaped beam define an air duct. The U-shaped beam has an upper wall, a side wall and a lower wall with the walls having a plurality of holes and at least one of the walls having a groove. A support bracket has a plurality of flanges for engaging the outer surface of the U-shaped beam and a protrusion for aligning with and being received by the groove of the U-shaped beam. A plurality of embossments on the support bracket align with and are received by the holes in the beam. A steering column bracket mounts to the support bracket securing the steering column to the support bracket. An insert bracket engages the inner surface of the U-shaped beam and has a recess for aligning with and receiving the groove of the U-shaped beam.

Abstract: An improved method is disclosed for fabricating a clutch cylinder-drum assembly for use in a vehicle drivetrain wherein no additional manufacturing steps are needed to remove weld spatter or weld material from the interior of the clutch cylinder. In a first embodiment, a drum has an annular axially protruding projection which is forcibly positioned against a clutch cylinder. Electrical current is passed through the projecton to create a weld connection securing the clutch cylinder to the drum. A second embodiment uses a laser beam weld to join these components.

Abstract: A bolt feed device for feeding a welding bolt to a welding section of a welder is installed separately from an electrode. The device includes a feed device body holding an end portion of a welding bolt feed pipe; a feed rod installed for movement forward or rearward relative to the feed device body; a bolt grasping section having a bolt receptacle and installed to the feed rod so that when the feed rod is at a retreat position the bolt receptacle is positioned at a lower end portion of the feed pipe, and when it is at an advance position the bolt receptacle is positioned at the welding section; and an inserting device having a welding bolt inserting cylinder and installed to the feed rod so that when the feed rod is at the retreat position the welding bolt inserting cylinder is positioned at a lateral side of the feed pipe, and when it is at the advance position the welding bolt inserting cylinder is rotated and positioned onto the bolt receptacle of the bolt grasping section.

Abstract: An electric resistance welding method for welding zinc plated steel plates. The zinc plated steel plates having at least one surface covered with a plating layer composed of mainly zinc can be welded by the present invention efficiently while overlapping said plating layers, because a material for increasing the resistance between the zinc plated steel plates is employed in the present invention, and it is either spreaded, coated or bonded on the surface of said plating layers to be joined beforehand. Thus, the electric resistance of zinc plated steel plates can be performed by a lower electric current in a shorter time without deteriorating the anti-corrosion property of zinc plated steel plates, because the electric resistance between the steel plates has been increased by such a material.

Abstract: A method for joining a porous metallic member and a non-porous metallic member includes by passage of an electric current after forming a dense portion on a joining surface of the porous metallic member by caving a projection provided on a joining surface of the non-porous metallic member into said porous metallic member whereby both metallic members are joined firmly without using screws or adhesives.

Abstract: A process for producing a PTC device comprising the steps of forming a laminate comprising a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, opposing the surface of a lead plate to be electrically connected to each of the electrodes, to the surface of each of the electrode plates of the laminate while contacting at a narrow area, and then passing a current between the electrode and the lead via the narrow contact surface to weld them. By this process, there is obtained a PTC device having, at a portion of the joining interface between each electrode plate and each lead plate, a nugget formed by melting both the plates. This PTC device has a low contact resistance between the PTC composition and the electrode plates.

Abstract: A hermetically sealed housing for a solid state device or the like includes a metal header having a mounting surface and a metal cap mounted on the header and over the mounting surface. The cap includes a cup-shaped portion and a flange extending radially outwardly from the rim of the cup-shaped portion. A weld ring projects from a surface of the flange toward the header mounting surface and is welded to the mounting surface. A second ring projects from the surface of the flange and is spaced radially inwardly from the weld ring. The second ring is shorter than the weld ring so that it preferably just contacts the mounting surface of the header. The second ring captures any metal particles splashed from the weld ring during the welding of the cap to the header and thereby minimizes particle induced noise.

Abstract: In a method of spot-welding flat-type electrical conductors, sandwiched between insulators, to metal terminals, a portion of one insulator layer is removed from an end portion of a flat-type electrical conductor to expose the electrical conductors on one side. The end portion of the electrical conductors is put between two metal plates which is connected to form a metal terminal. A projection is formed on the metal plate which is disposed on the exposed conductor side such that it is in contact with the conductor before the conductor is spot-welded to the metal plates.

Abstract: A method for producing a piston rod for securing a ball to each end of a rod through projection welding which comprises detachably retaining the ball to be secured in a ball holder for presenting the proximate rod end to the ball; the ball holder being constructed of electrically conductive material to provide a first electrode, with the rod holder being constructed of electrically conductive metal to provide a second electrode. The ball holder and rod holder are adapted for relative travel toward each other to effect a mutual zone of ball and rod contact. Electric current is then passed through the first and second electrodes for projection welding of the ball and rod through the zone of contact while the same are in an inert gas atmosphere. Then the now welded contact is cooled; and thereafter a second electric current is passed therethrough to temper the weld.

Abstract: A resistance welding pin for connecting insulation batts to ducts comprises a head having a shank and a sharpened tip remote from the head. The shank, adjacent the tip, includes an abutment against which a welding electrode may bear, the electrode being passed through an aperture or passage in the head.

Abstract: A resistance weld pin for securing insulation to duct interiors is disclosed. A characterizing feature resides in the provision of a layer of heat activated adhesive on the under surface of the washer of the weld pin, which adhesive is melted in the course of forming a resistance weld and bonds to the surface of the insulation, defining an annular air seal surrounding the pin.

Abstract: A projection welder including a guide pin adapted to be withdrawn, when welding is performed, into an electrode for performing welding. The guide pin is formed with a tapering surface portion which is positioned, when the guide pin is inserted in a threaded opening formed in a nut to be welded which adheres to a forward end of the electrode, against the edge of an entrance to the threaded opening.

Abstract: A process for producing a PTC device comprising the steps of forming a laminate comprising a PTC composition and at least two electrode plates having the PTC composition sandwiched therebetween, opposing the surface of a lead plate to be electrically connected to each of the electrodes, to the surface of each of the electrode plates of the laminate while contacting at a narrow area, and then passing a current between the electrode and the lead via the narrow contact surface to weld them. By this process, there is obtained a PTC device having, at a portion of the joining interface between each electrode plate and each lead plate, a nugget formed by melting both the plates. This PTC device has a low contact resistance between the PTC composition and the electrode plates.

Abstract: The casing of an electric machine has ribs welded onto a casing jacket, the ribs displaying a U-shaped profile. The legs of the ribs can be secured by resistance projection welding to the casing jacket. One rib can be somewhat larger than the other ribs and used as a support for a foot.

Abstract: The disclosure relates to a method whereby complex shapes, not moldable in a single molding operation, are molded in plural parts, each part being of the same or different powdered metal composition or prealloy of the type disclosed. One or more of the parts preferably has bumps or dimples thereon for joining to another of the parts in the manner to be described. The other part can also have depressions for receiving the bumps to aid in alignment of the parts prior to processing.

Abstract: A hermetically sealable package for electronic component comprising a metallic base member and a metallic lid member, in which the metallic base member has lead wires penetrating therethrough under insulation. The base member or lid member is provided on its periphery with a protrusion for welding. The protrusion can be terraced. The sealing can be made by an independently prepared sealing member to be inserted between the sealing area of the base member and the sealing area of the lid member. The protrusion or the sealing member can be prepared by an etching technology.

Abstract: A method of making an assembly including a metal tube and a surrounding flange member comprises providing an abutment shoulder at the open end of the tube, passing a spacer sleeve along the tube into engagement with the shoulder, placing the flange member in engagement with a flange of the sleeve and welding one end of the spacer sleeve to the shoulder and the other end thereof to the flange. It is alternatively possible for the flange and sleeve to be integrally formed, in which case only welding to the shoulder is required.

Abstract: The leak-tight welding of elongated joints, particularly of circular, interlocked joints, such as, for example, the fluid-tight welding of plugs on drums is achieved by folding over the edge (11), or the circular margins around a circular opening, of the sheet (1) onto which, e.g., a plug (27) or other workpiece is to be welded liquid-tightly, laying the workpiece against the folded-over edge (11), and then applying electrodes (28, 30) on opposite sides of the workpiece and sheet, with sufficient pressure that the folded-over sheet margin (11) is further deformed. In this way, the surface-parts not lying flat against each other at the contact-surface (35/32) of the workpiece and sheet margins are forced into accommodation and an even distribution of pressure along the contact-surface results. When the welding-current is switched on, the current density is essentially uniform throughout the contact-surface and hence a simultaneous welding along the entire contact-surface occurs, producing a a leak-tight joint.

Abstract: A method of making a watchcase, in which two projections are formed on a joining surface of a part of the watchcase, such as a band connecting lug. The part is joined to another part such as a case body by projection welding to make the watchcase.

Abstract: A process for the manufacture of half bearings with flanges rigidly connected thereto, made of a steel plate with an antifriction layer, in which the plain (i.e. not yet flanged) half bearing and a pair of flanges are produced and worked separately, and subsequently the two flanges are fixed, in the correct position, onto the half bearing by a welding operation carried out by projection or by condenser discharge. The preparation and working of the thus separate components results in being very economical owing both to the reduction of the operational costs and to a considerable reduction of the cost of the necessary equipment, and the production times are remarkably reduced. The welding step requires very short times and, by the suitable choice of the process used for the welding operation, no deterioration of the antifriction layer applied to the support steel plate occurs, nor any deformation of the plate itself, so that no further working on the finished piece is required.

Abstract: A weld nut welding apparatus includes upper and lower electrodes. A weld nut and a plate material which are to be welded together are clamped between the upper and lower electrodes, and a welding current is supplied to the weld nut and the plate material via these electrodes, whereby the weld nut is welded to the plate material. A groove is formed in that surface of the weld nut which abuts against the plate material, while a punch is provided inside the lower electrode, and the punch is moved toward the upper electrode after the welding operation, whereby it is possible for the plate material to be formed with a bore which corresponds to the groove. This bore is punched in the plate material only at a required welding position and at the same time as the welding operation. It is therefore possible to overcome the disadvantage that it would otherwise be necessary for a bore to be previously formed in the plate material.

Abstract: Spot- and projection-welding of aluminum sheets has always been connected with difficulties mainly because of the surface layers of aluminum oxide, and even by pickling, these difficulties could be only partly eliminated. The main difficulties have always been insufficient electrode life times, the unsatisfactory quality of the weld and especially the unsolved problem of achieving good quality welding and long electrode-life when using un-pretreated aluminum sheets. The problem has been solved in principle by using electrodes having profiled contact-surfaces, by means of which the layer of oxide is broken during pre-pressing and a direct contact between the electrode and unoxidized material of the workpiece is provided, the contact-resistance of which is lower than the portion of the overall resistance of the point of weld formed by the metal of the aluminum sheets to be welded together.

Abstract: A conductor guiding support formed of two chains retained in parallel spaced apart relationship by spacers which support the conductors between the chains. The chains are formed of successive links pivotably coupled to each other with each link being formed of two matching plates. One end portion of each plate is provided with a central hole and arcuate slots spaced about a circle that is concentric to the central hole. The opposite end portion of the plate is offset and is provided with bosses that are in a pattern that corresponds to the pattern of the hole and slots on the other end. Two plates are placed face-to-face to form a link and the portions with the central hole and arcuate slots are in surface contact with each other while the offset portion that present the bosses are spaced from each other. The portion of the succeeding link with the contacting surfaces is placed in this space with the bosses of the offset portion engaging the openings in the surface contacting portions.

Abstract: A projection for use in electrical resistance welding of sheet metals and thin-wall parts, a method of fabricating such projection and the use of the same are disclosed. The flanks of the projection possess internally thereof an angle of about 40.degree. to 75.degree. and externally an angle of about 40.degree. to 100.degree., and the strength of the material at the region of the flanks is about 50% greater than the strength of the neighboring basic material. The method of forming the projection contemplates fabricating the same through plastic deformation of the basic material and the dimensionally exact shaping is accomplished by compression molding of the flowable metal between a punch and die of a tool.

Abstract: A method for resistance welding zinc-coated steel members is described wherein at least one member comprises a copper layer intermediate the steel and the zinc coating. The copper layer melts during welding and seals fissures within the fused steel to produce a hermetic weld. The copper layer also protects exterior surfaces where the zinc coating is disrupted by the welding operation.

Abstract: Applicant's invention relates to a process and apparatus for the high speed welding in large quantities of various geometric shaped jump rings to buttons, pendants and other jewelry by utilizing composite jump ring apparatus having first and second projections extending from the jump rings at different locations so that they may function in automatic welding machines.

Abstract: A process for forming metal walls for prepainted metal cabinets and the like, such as by welding a galvanized back panel to a prepainted metal refrigerator-freezer cabinet wrapper painted only on the exterior wall surface thereof, and wherein flange sections functioning as marginal edge portions of the wall are folded over from the wrapper side walls. These flange sections are deformed to form recessed inwardly projecting bead portions therein along the edge portions, with paint either removed from the contact surfaces of the interiorly facing bead portions or not present thereon because of the manner in which the flange is formed. A back panel, with projecting bead portions arranged along the edges thereof which face exteriorly, is disposed with its edges lapping the flange portions of the wrapper sufficiently to cover bead portions thereon, with the beads in the panel projecting toward and in contact with the oppositely projecting beads of the flange section.

Abstract: Method is disclosed for manufacturing a panel assembly comprised of an inner panel and an outer panel which are welded together at the peripheral portions thereof.

Abstract: A resistance welding system having a low-inertia movable welding head coupled to a stationary welding transformer which is of low mutual reactance. Through an appropriate timing circuit and control, a high-energy pulse of current, of very short time duration, is transmitted through the welding transformer to the movable welding head. The welding head, which contacts a projection on overlapping components, effects a rapid welding of the components, and the welding head rapidly follows up the melting of the projection due to its low inertia.

Abstract: An improved method of manufacturing a vacuum booster housing for use in a brake system of an automotive vehicle where the brake master cylinder is secured to an annular wall portion of the body of the booster housing by means of bolts passing through holes in the annular wall portion. The method comprises forming annular projections on the seating faces of the heads of the bolts coaxial with the bolt shafts and on the inside surfaces of the annular wall portion coaxial with the holes, disposing a reinforcing plate between and in contact with the annular projections, and simultaneously projection welding the reinforcing plate to the inside surface of the annular wall portion and the seating face of the bolt head to the reinforcing plate.

Abstract: A method for fabricating a watch case comprising the steps of placing contact points of a bezel and a watch body to face to each other, applying pressure to said contact points through electrodes, and applying pulse current to said electrodes until said contact points get molten. The pulse current will allow the bezel and the body except the contact points to cool down during its intervals. Therefore, this method does not require a water-cooling system as required by conventional methods.

Abstract: An iron core for a rotary electric machine suitable for use as stator iron cores of AC generators for vehicles, for example, winding an iron core blank of strip form and joining convolutions of the spirally wound iron core blank together by electric resistance winding. The spirally wound iron core blank has a plurality of circumferentially spaced apart projections on one surface and a plurality of circumferentially spaced apart recesses on the other surface in positions corresponding to the projections on the one surface. The projections and recesses coincide in position when the iron core blank is spirally wound and convolutions thereof are superposed one above another. The provision of the projections and recesses enables winding of the iron core blank into a spiral form and welding of the convolutions of the spirally wound iron core blank to be effected economically and with increased accuracy.

Abstract: Disclosed subject matter includes flexible motor mounting members particularly adapted for vibration induced flexing movement combined with oscillatory movement about a pivot axis at a point of attachment on a blower housing or other support. Short but strong mounting members are provided that have low torsional mode vibration transmissibilities. Leaf spring mounting arms have low torsional spring constants and yet have sufficient strength to withstand shipping and handling loads for motor .Iadd.blower .Iaddend.assemblies and to permit all angle motor mounting. The mounting member spring constants for axial, radial and tilting vibration modes are selected in specific forms so that the characteristic vibration transmissibility ratios for these modes are each close to unity. However, the characteristic torsional mode vibration transmissibility is substantially less than unity.