Abstract: A method of assembling a pilot to a torque converter cover is provided with the method including: (a) providing the pilot having an annular projection in a connection region; (b) forming a torque converter cover of a torque converter with a complementary recess or annular groove to the annular projection in a mating connection region; (c) positioning the pilot on the torque converter cover with the annular projection at least partially received in the complementary recess or annular groove; and (d) applying force and energy to the pilot to weld the pilot to the torque converter cover. A torque converter assembly is also provided.

Abstract: For butt-welding, which includes bringing joining end surfaces of a cup member and a shaft member into abutment against each other and radiating a high energy intensity beam from a radially outer side, the shaft member has a recess on a radially inner side of the joining end surface to obtain a welded portion having a closed hollow cavity on a radially inner side after butt-welding. The joining end surface (protruding surface) of the cup member protrudes toward a radially inner side with respect to an inner diameter of the joining end surface of the shaft member. With this, a welded portion of an outer joint member of a constant velocity universal joint, which is manufactured by joining the cup member and the shaft member, can be improved in strength and quality.

Abstract: A joining structure of the invention includes a first metal sheet and a pair of second metal sheets. Each of the pair of second metal sheets is overlapped on the first metal sheet in a state where an end surface of one of the second metal sheets and an end surface of the other second metal sheet face each other, and the end surfaces that face each other are integrally joined to the first metal sheet by means of a single mass of melted metal.

Abstract: A weld stud for drawn-arc stud welding has a functional portion and a welding portion which represents one end of the weld stud and which is delimited by a front face that is curved outwards in a longitudinal direction of the weld stud.

Abstract: Mash seam welding is performed to weld metal plates with thicknesses of 2 mm or more to stabilize the strength of a joint portion, reduce uneven parts of the joint portion, and ensure high strength and reliability of the joint portion. First, two metal plates, clamped with first and second clamping devices, are placed to overlap each other at their end portions. The overlapping portions (L) of the metal plates are pressed together with a pair of upper and lower electrode wheels while welding currents flow to continuously weld the overlapping portions (L) and join the metal plates. The pressing forces applied to the electrode wheels are controlled so that upper and lower welding forces acting upon the overlapping portions are equal to each other during the time when the overlapping portions are continuously welded.

Abstract: Method for setting up a condensation plant, for which two tube bundles (2, 3) are placed on a roof-shaped preassembly frame (1) and connected to one another in a first area. The tube bundles (2, 3,), along with the base plates (5, 6) thereof which hold the heat-exchanger tubes, are placed in supports (10) at a roof ridge strut (11) of the preassembly frame (1) in such a way that the mutually facing longitudinal sides (12, 13) of the base plates (5, 6) can be welded together by means of a root seam, before the preassembled roof-shaped tube bundle delta (14) is lifted from the preassembly frame (1) and brought into the installed position.

Abstract: A unique tubular work piece is disclosed along with a novel method and apparatus for manufacturing tubular work pieces from sheet metal stock lighter and stronger structures with less waste and less cost than prior methods.

Abstract: A weld fairing apparatus and a welding method using the apparatus effectively prevent a weld metal zone from forming a humping bead. The welding method includes: butting first and second object pieces together; heating the butted first and second object pieces using a heating device, thus forming a weld metal zone; and placing a fairing device such that the fairing device comes into contact with the weld metal zone and fairs the weld metal zone.

Abstract: Tubular ends are heated to a predetermined temperature above 1200 degrees Celsius and surrounded by a shield gas when the tubular ends are pressed together to form forge welded tubular ends. The forge welded tubular ends are then cooled down rapidly from said temperature above 1200 to at most 600 degrees Celsius within 3 minutes after the forge welding operation.

Abstract: A combination of work pieces is provided that includes a first work piece having a stepped end preparation with a first step and a second step, and a second work piece having a beveled end preparation. The first step is located at an end of the work piece and the second step is set away longitudinally from the end. A weld joint is provided having a joint groove with a lower face formed by a stepped end preparation, such as that of the first work piece, and an upper face formed by a beveled end preparation, such as that of the second work piece. A method for welding a first work piece to a second work piece is also provided. Preferably, in the weld joint and welding method, the first and second work pieces are in a vertically-extended (2G) arrangement.

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: To provide a seam welding apparatus and a seam welding method that may operate at a low pressure to obtain a suitable overlapped alignment amount. In the seam welding apparatus, a trailing plate clamp moving means is provided with link mechanisms for overlapping and aligning a leading end of a trailing plate with a trailing end of a leading plate and a link drive source for operating the link mechanisms under an extended condition. The link mechanisms are arranged in parallel along both side edges of the trailing plate. The pair of link mechanisms are connected to a link drive source to form a parallel link mechanism assembled through a coupling link. Also, a movable portion of the leading plate clamp means has a tilt pivot. This tilt pivot is adapted to be movable so that the overlapped alignment amount may be adjusted.

Abstract: The present invention provides a method for hermetically sealing a semiconductor laser element, by which the cleanness of a package can be maintained extremely satisfactorily in a stabilized state, in order to prevent organic substances from being adhered to the end faces of high output semiconductor laser elements due to photochemical actions. The method comprises the first step of introducing oxygen into a chamber of a hermetical-sealing apparatus and irradiating ultraviolet rays onto an unsealed package having a semiconductor laser element mounted, in the chamber, and the second step of purging the chamber with an inert gas and hermetically sealing an unsealed package in the inert gas atmosphere without being exposed to the outer atmosphere.

Abstract: A method for making a spacer assembly comprises: forming a plurality of projections along an edge of a portion of sheet metal; roll forming the portion of sheet metal into a tubular configuration; positioning the roll formed portion of sheet metal and a metal base member to which the roll formed portion of sheet metal is to be welded in a discharge welding apparatus having a pair of electrodes so that the projections of the roll formed portion of sheet metal contact a surface of the metal base member; providing a force so that the projections are disposed in forcible engagement with the surface of the metal base member; and supplying an electrical current between the pair of electrodes and through the roll formed portion of sheet metal and the metal base member so that the projections reach a molten metal stage and are subsequently solidified to enable the roll formed portion of sheet metal to be welded to the metal base member.

Abstract: A joint is formed between adjacent edges of a pair of weldable components by forming an undercut on one of the edges. The other edge abuts the undercut so that a portion of the one edge overlaps the other. The edges are laser welded by impinging a beam on the portion to melt the overlap.

Abstract: To provide a material to be welded for butt welding which can reduce contamination of particles into a welded portion after the welding is executed and which can construct piping or a device each enabling realization with high repeatability a ultra-clean atmosphere in which the density of impurity such as moisture or the like is suppressed, and a method of cutting the same. Also to provide a wire used for wire cut electric discharge machine which can prevent reduction of chromium composition in a place adjacent to the welded bead section after the welding is executed. (1) A face to be butted of the material to be welded is cut by a wire cut electric discharge machine. It should be noted that it is preferable that the surface of the wire used for the wire cut electric discharge machine is stainless or chromium and that stainless steel or chromium having a thickness of not less than 0.1 .mu.m is deposited on the cut face.

Abstract: The present invention discloses methods and apparatus for joining of two workpieces. The present invention includes special preparation of the joining ends of the two workpieces to be joined. Methods of the present invention include delivering a high current, low voltage pulse to a pair of workpieces to be joined while applying and maintaining a constantly high load on said workpieces to thereby join the workpieces.

Abstract: The invention relates to a process of butt-welding together sheet metal plates, in particular those having different sheet metal thicknesses, by means of an edge preparation that mills the edges of the sheet metal plates while they are clamped in a sheet metal stack. For this purpose, an appropriate apparatus is provided having supporting and clamping mechanisms.

Abstract: A method for heating pipes with closely spaced end portions that are to be joined by forge welding or the like. Two diametrically opposed contacts are attached to each end portion for supplying high frequency alternating current for resistance heating of the material in the respective end portions. The contacts for one of the pipes being located in close proximity to and substantially in the same axial plane as the contacts for the other pipe. The contacts for one of the pipes are arranged to form an angle (.alpha.) with juxtaposed contacts of the other pipe so that the projections of the juxtaposed contacts onto the axial plane intersect.

Abstract: A flash welding machine is capable of cutting ends of a pair of preceding and following weld members 1, 2 by means of a shear device 26, 27 and then flash welding them with each other. The flash welding machine can coat an appropriate amount of combustible fluid on the cut end surfaces of the weld members 1, 2. When a first end sensor 31 and a second end sensor 31 sense widthwise leading ends of the weld members 1, 2, a first and a second nozzle 35, 36 start coating the combustible fluid on the cut end surfaces of the weld members 1, 2 from the widthwise leading ends of the weld meets 1, 2. The nozzles 35, 36 stop coating when either one of the sensors 31, 33 senses a widthwise trailing end of one of the weld members 1, 2. Thus, it becomes possible to coat the combustible fluid on the cut ends of the weld members 1, 2 over an area extending from the widthwise leading end to the widthwise trailing end thereof.

Abstract: First, welding protrusions of two aluminum alloy plates are butted against each other, and an engagement projection of one of the aluminum alloy plates is brought into engagement with an engagement recess of the other aluminum alloy plate, thereby maintaining the butted state and defining voids in back of butt regions of the welding protrusions in a direction of irradiation of a laser beam. Then, the laser beam is irradiated to the butt regions to bond the welding protrusions to each other. The Al.sub.2 O.sub.3 films located on the surfaces of the welding protrusions on a back side in a direction of irradiation of the laser beam are pushed into the voids by a molten pool and hence, they cannot intrude into a weld zone to form a notch. By employing this arrangement in the butt welding using the laser beam, the need for a jig for maintaining the butted state of the aluminum alloy plates is eliminated and a butt joint having a high strength can be obtained.

Abstract: As preparation for the seam welding of different thickness sheet metal blanks (10 and 12), at least the thicker (10) of the two blanks is reduced in thickness, preferably by chip machining, in its edge region (11) which is intended for welding. Since the edge regions (11 and 13) which are to be welded then approximate to each other in their thicknesses (t1+t2), practically symmetrical conditions with regard to the joint plane exist for the welding operation, so that the welding can proceed with substantially the same controllable welding parameters as in the seam welding of sheet metal blanks of equal thickness. The process is suitable mainly for use in mash seam welding, but also in other seam welding processes, such as for example, in laser welding.

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: An improved high energy density welding method for reducing input keyhole welding prepares the weld joint (8) between two edges (10, 14) of at least one member by separating the edges (10, 14) of the member (12, 16) with a controllable gap (22) by a projecting portion (24) selectively positioned on one edge (10, 14) of the member (12, 16). The projecting portion (24) closely abuts the other edge of the member for maintaining the controlled distance (d) of the controllable gap (22) to enhance the welding method.

Abstract: An improved infusion device is of the type which can be implanted for drug delivery within a patient's body, and supplied with infusate without the need for surgical removal. The infusion device has a housing forming a chamber and an entry port into the chamber. The entry port is closed by a septum. The septum has a convex top section extending from the housing, and a frusto-conical section which matingly engages a similarly shaped interior surface of the housing. The interior surface can be provided with a plurality of notches with which the septum engages by material flexure. This arrangement improves retention of the septum and operation of the infusion device, and permits advances in the method by which such devices are manufactured.

Abstract: An apparatus for connecting strips, in which a rear end portion of a preceding strip and a front end portion of a succeeding strip are cut and brought into contact to each other so that a butt welding of the contacted portions may be carried out to connect both the strips. A carriage is provided for carrying a cutting device for cutting the end portions of both the strips. A finish-machining device is provided for finish-machining the cut end faces of both the strips and a welding device for butt welding both the strips along a contacting line of both the strips is installed so as to be movable in a line substantially parallel with the contacting line of both the strips. Die wears and burrs incidental to cut faces can be prevented from forming and the highly accurate contacted state of strips can be achieved, thereby improving the quality of the welded portion.

Abstract: The thermal expansion of parts to be welded to each other is reduced in that one or more of the parts are modified to include expansion slots in the welding area. This limits thermal expansion to the remaining small areas only which are allowed to expand within the slots. Total expansion of such welded parts is thus reduced after solidfication. In most applications, such slots do not effect the total design of the welded parts. If required, such slots can be sealed after welding.

Abstract: In a method for heating metal elements (1,2) which are to be joined, for example by forge welding, there is used a high frequency resistance heating. The elements are provided with surfaces to be welded and are positioned so that said surfaces constituted a narrow gap (3). The current is conducted from a high frequency current source (11) through a contact (9) into one of the elements (1), wherefrom the current follows the material close to the gap surface (4) and to the opposite side of the element, where the current flows via further contacts (8,9) and a conductor (10) to the other element (2). From here the current follows the other gap surface (5) to another contact (7) and the current source (11). The current will follow a path close to the gap surfaces since these surfaces will give the path of smallest total impedance, the current thereby establishing a narrow and efficient heating zone in the vicinity of said gap surfaces.

Abstract: A welding apparatus for welding a trailing end of a preceding strip and a leading end of a subsequent strip including a shear device for cutting them in parallel and a back bar device for supporting the ends of the strips. Provision is made to detachably connect the shear device and the back bar device and move them along a common rail between the strip ends.

Abstract: Portable welding apparatus for use in underwater arc welding comprising a housing through whose wall extends a welding gun. The housing has an aperture for fitment over an item to be welded to a structure and the housing has a gas inlet for evacuation of water from the housing in use.The apparatus preferably includes a rotatable housing portion on a fixed base so that welding can be performed around items which are contained wholly within the housing, thereby ensuring a dry environment for the well under water.

Abstract: A process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side, in which the welding seam is protected against corrosion. To obtain a welding seam flush with the sheet and protected against corrosion, without the reworking of the welding seam and without the use of filler material, sheets or strips having essentially rectangular cut edges with a corrosion in the longitudinal direction of at most 0.4 mm are used. The sheets and strips brought into touch contact with these cut edges are melted in the region of the welding joint by means of a laser beam, of which the focal spot covering the cut edges has a diameter of at most 0.2 mm. Because of the extremely narrow welding gap, the voids are filled by the molten material of the adjacent sheets, without any detectable reduction in the thickness of the sheets or strips.

Abstract: The average winding diameter of a finite roller band length wound on a supply coil is increased by having the roller band rewound from the supply coil to a storage coil of a larger than the winding diameter, which encloses the supply coil concentrically. During the uncoiling of the band stored on the storage coil for purposes of a continuous manufacturing operation, a welding device is arranged in the annular area between the external diameter of the supply coil and the internal diameter of the storage coil and welds the band trailing end of the storage coil together with the band and leading end of the supply coil. The contents of the supply coil are then taken over by the storage coil, and while this material is uncoiled, a further supply coil is inserted and its leading edge welded to the end of the storage coil.

Abstract: The h.f.-heated edges of a split tube are prepared prior to heating by means of contour-rolling the edges in order to obtain a convex contour in which the temperature is isothermically distributed, parallel to the convex edges.

Abstract: In manufacturing steel sections by high-frequency resistance welding, weld beads are produced along the weld line of the material. However, rolls disposed in the neighborhood of the welding end point squeeze the red-hot weld beads into a uniform shape.

Abstract: A method for attaching a bicycle fork fitting to a fork leg is disclosed, using a particular fork fitting means. A steel pipe is formed with a fork leg including its one closed distal end with a joint. The fitting means is provided with projections at the portions near to both ends of the side thereof to be welded. Electric currents are passed through the closed portion of the fork leg and the projections of the fitting which are brought in contact with each other under pressure. Upon reaching a temperature suitable for welding, the thus integrated arrangement is upset under greater pressure, so that the fitting is welded to the fork leg.

Abstract: In a flash welding apparatus, different length guides and driving devices thereof are formed on lower parts of an inlet side electrode table and an outlet side electrode table and the electrode tables and a compact rotary shear unit are arranged in the direction perpendicular to a strip line when both of the electrode tables are approached and one of the guides is commonly used as a guide for shifting a flash trimmer lower unit and a guide is formed on one of the upper electrode frames of the electrode tables so as to shift a flash trimmer upper unit and the rotary shear unit of the inlet side electrode table and the rotary shear unit of the outlet side electrode table and a pair of the upper and lower trimmer units are aligned in the plan view.

Abstract: A welded seam between overlapped edges of sheet material wherein the sheet material is heated to a temperature below the melting temperature and is forced together under high pressures to form a forged weld. The thickness of the sheet material in the weld area is reduced from double thickness to a thickness approaching a single thickness, with the weld interface being diagonally disposed. The weld is effected by grain growth across the interface such that the particular line along which the meeting surfaces of the metal are welded together is unobservable upon etching a cross section thereof and with magnification on the order of 100X. The heating is effected by applying to opposing edge portions which are to be overlapped and welded a high frequency current which effectively reduces heating to edge portions only of the metal with the heat effected area being in the vicinity of 0.1 inch.

Abstract: Apparatus for preparing two tubes to be welded together at their ends and for placing the ends in opposed, abutting relationship for welding. The apparatus includes means for annealing a portion or length of each tube, and means for stretching the portion or length of each tube for straightening purposes after it is annealed. In addition, the apparatus includes means for severing an end portion of the annealed length of each tube to provide two annealed tube ends for abutting and welding together. Further, the apparatus includes means for forcing the abutting ends of the tubes together in a manner that will upset the material of the tube ends during welding.

Abstract: A TIG pipe welding method which employs two sets of machine guide surfaces on the pipe ends. First radially inner guide surfaces cooperate with a sensor coupled to the welding torch to continuously monitor the arc gap between the welding electrode and the weld puddle as the welding electrode moves around the circumference of the pipe. The second set of radially outer surfaces cooperate with a welding carriage to guide the carriage and welding modules around the pipe joint. The carriage is constructed to provide a sealed welding chamber surrounding the electrode. An additional flow of shielding gas is provided around the torch electrode of a TIG or hot wire TIG welding module to augment the normal gas shield.

Abstract: A method for manufacturing an electrical connector is disclosed in which the connector itself comprises an aluminum barrel member having a first and a second end, with the barrel member having a recess in its first end adapted to receive an electrical cable and a copper lead member extending axially out of its second end. The method comprises the steps of first forming a second recess in the second end of the barrel member, and forming one end of the copper lead member such that it includes a portion having a reduced cross-sectional area relative to the rest of the copper lead member. This end of the copper lead member is then inserted into the second recess in the barrel member, and electrical current is provided through the copper lead member and the barrel member while simultaneously applying force to bring the end of the copper lead member into engagement with the bottom of the second recess in the barrel member.

Abstract: A strip flash welder having a guillotine shear unit which is movable from a position out of the strip flow path into a position for shearing strip ends between the main clamping dies of the machine.

Abstract: A pair of pipe ends are first prepared prior to welding to provide highly accurate guide surfaces. Secondly, a welding torch carriage arrangement is provided which engages the exterior surfaces of the abutting pipe ends to be welded, which carriage is guided around the circumference of the pipe ends in conjunction with the guide surfaces provided thereon. Thirdly, a back-up band arrangement is provided interiorly of the joint to be welded.An expandable band is employed to provide a mold on the interior of the joint into which the weld puddle is flowed which may be made of any appropriate material, but preferably is copper. The back-up band is carried on a set of rounding jacks which engage the facing pipe ends and exert a circumferentially uniform radial force on the pipes. This serves to round the ends equally and bring them into coaxial alignment with each other in the vicinity of the joint. The back-up band bridges the joint and expands to form a closed or semi-sealed chamber around the joint.

Abstract: The present invention discloses a full-automatic flash welding apparatus wherein the trailing edge of the preceding strip and the leading edge of the succeeding strip are automatically accurately positioned, rigidly clamped and simultaneously cut off, the new trailing and leading edges are automatically machined and then butt welded, and thereafter the flash on the upper and lower surfaces of the joined strips is automatically removed.

Abstract: A metal welding gasket secured between a cover and a container to prevent expulsion of weld material into the interior of the device being welded.

Abstract: In the production of longitudinally welded pipes, the metal strip is treated with a chemical deoxidizing agent, such as a hydrazine compound, to remove oxides from at least the strip edges, prior to arc welding, to provide an improved weld.

Abstract: A microelectronic circuit case for continuous seam welding to a lid and having a chamfer on the inner corner of the case upper edge for improving welding and sealing reliability, and a method of making the case.