Abstract: Provided is a method of repair which method is capable of holding a molten brazing material at the bonding portion when a component is bonded with a brazing material to an inclined or to a curved surface. The method of repair repairs by brazing a repair portion in which a crack has developed and which needs repair, wherein a brazing material support (4) holding in the interior thereof a molten brazing material (5) is brought into contact with the repair portion, and under the condition that the brazing material support (4) is in contact with the repair portion, the molten brazing material (5) is solidified. Under the condition that the brazing material (5) in a powder form is brought into contact with the brazing material support (4), the brazing material (5) can be melted by heating to a temperature at or above the melting point of the brazing material (5).

Abstract: An external weld bead is removed and processed from a welded pipe traveling in a downstream direction. The weld bead is separated from the pipe, allowed to flow in a downstream direction, and is guided downstream and cut into chips at a location downstream of where the weld bead is separated from the pipe. Also disclosed is weld bead cutting tool including a cutting edge at an upstream end of the tool, a guide feature disposed downstream of the cutting edge and extending toward a downstream end of the tool, wherein the guide feature widens from the upstream end toward the downstream end.

Abstract: A terminal of a compact wire loop with a great strength of bonding is formed by a method including: a first folding step in which a tip end of a capillary is raised by a height of H1 from a point 86a where the center of the capillary is positioned during second bonding on a lead 74 to a point “p”, and then moved horizontally by a first distance of L1 toward a pad 73, and lowered to a point “r”; a second folding step in which the tip end of the capillary is raised from the point “r” to a height of H2 and then moved horizontally toward the lead 74 by a second distance of L2; and a third bonding step in which the center of the capillary is aligned with and then lowered to a point 87a on the lead 74 adjacent to the point 86a.

Abstract: In at least one embodiment, for producing segments of tubular jackets, a strip-shaped sheet material is continuously reshaped transverse to the strip axis into a closed form and following the welding of a longitudinal seam, jacket sections are cut off the jacket strip. In at least one embodiment, a support edge is provided on the inside of the continuously formed jacket strip for the cutting operation, essentially in the form of a closed circle and extending in a normal plane to the longitudinal axis of the jacket strip, which fits directly against the inside of the jacket strip and cooperates with at least one cutting tool. The cutting tool is pivoted into the cutting position during the cutting operation along the support edge, so that a cutting region rotates once around the longitudinal axis. A section of the jacket strip is cut off, wherein during the cutting operation, the support edge and the at least one cutting tool are advanced along with the jacket strip.

Abstract: A method of processing heated metal logs in a metal extrusion process. The remainder of each log is attached to the succeeding log. Specifically, the abutted ends of the two log segments are aligned with a saw. The saw is actuated to simultaneously remove material from both of the abutted ends. The cut ends are friction welded together through relative rotation of the log segments. The process creates a heated log column that is effectively endless, eliminating log remainders.

Abstract: A fuel rail for high-pressure direct-injection internal combustion engines has an injector holder and a fastening bracket directly attached to a main body of the fuel rail. Thermal deformation may occur at the time of temporary fitting or brazing when assembling the rail. However, positional accuracy of the injector holder can be assured, which results in having an excellent sealing property. Components of the fuel rail for direct-injection internal combustion engines are made of steel or stainless steel, and the components are joined reciprocally by brazing. The components joined by brazing are finished by cutting work and/or burnishing processing after the brazing step.

Abstract: The present disclosure relates to methods for joining ceramics to metals and a tool for use in the methods. A medical device and a method of manufacturing a medical device is also disclosed.

Abstract: A method of manufacturing an aerofoil structure to have a portion with an increased erosion resistance, the method comprising: providing one or more titanium elements (2, 4, 6) and a beta-stabilizing material (8); wherein the one or more elements (2, 4, 6) have an alpha-beta microstructure; assembling the one or more elements (2, 4, 6) and the beta-stabilizing material (8) such that the beta-stabilizing material (8) is adjacent to the one or more elements (2, 4, 6); and heating the assembly such that the beta-stabilizing material (8) diffuses into an adjacent portion of the one or more elements (2, 4, 6), causing the adjacent portion of the one or more elements (2, 4, 6) to have a beta microstructure which provides an increased erosion resistance.

Abstract: A welded joint of a lined pipeline has a main pipe and an extension piece having a generally tubular shape, an inner wall and an annular weld connecting the extension piece to the main pipe. A liner extends through the main pipe and partially into the extension piece. A compression ring includes a flange and a compression portion. The compression portion engages the liner internally and compresses the liner radially outwardly against the extension piece so that the liner is sealed with the compression ring.

Abstract: A semiconductor device (2) includes: a FLR (65) that is disposed on a semiconductor substrate so as to divide the semiconductor substrate into an inner region and an outer region; a first bonding pad (24a to 24d) that is disposed in the inner region and is connected to an external circuit by a wire (14a to 14d) whose one end is connected to the external circuit; and a second bonding pad (26a to 26d) that is disposed in the outer region and on which the other end of the wire is bonded.

Abstract: A bonding apparatus for bonding a length of wire comprises a first module which is drivable along a linear axis towards and away from a bonding point and a second module slidably mounted to the first module. A wire cutter is mounted to the first module and a bonding tool is mounted to the second module. A coupling mechanism is operative to lock the second module in fixed relative position to the first module, and to unlock the second module from its fixed relative position to the first module so that the second module is slidable relative to the first module in directions parallel to the linear axis.

Abstract: A method of processing heated metal logs in a metal extrusion process. The remainder of each log is attached to the succeeding log. Specifically, the abutted ends of the two log segments are aligned with a saw. The saw is actuated to simultaneously remove material from both of the abutted ends. The cut ends are friction welded together through relative rotation of the log segments. The process creates a heated log column that is effectively endless, eliminating log remainders.

Abstract: A method for removing a weld crown from a weld joint between first and second work pieces includes steps of positioning a rotary milling tool proximate to the joint and at an offset angle to set a cutting arc relative to the joint. The milling tool is positioned so the cutting arc intersects the weld crown, weld toes, and parent metal on each side of the weld joint. As the milling tool traverses the joint to cut away the weld crown, the milling tool may tilt from side to side to compensate for misalignment between the work pieces along the weld joint. An apparatus for weld crown removal holds a milling tool at an offset angle, and provides a tracking mechanism to permit the milling tool to track misalignment between the work pieces, maintaining the cutting arc in intersection with the weld toes and parent metal along the weld joint.

Abstract: A wire bonding method with the process of performing a first bonding to a pad of a die that is a first bond point, and the process of performing a second bonding to an interconnect wiring (or a lead) that is a second bond point, thus connecting the pad and the interconnect wiring with a wire. A bump is first formed on a pad, and, in a wire cutting step performed during the step of forming the bump, the wire protruding from the tip end of a capillary is bent in the lateral direction to form a bent part, and then the bent part is bonded to the bump, thus completing the first bonding process; after which the wire is bonded to the interconnect wiring, thus completing the second bonding process.

Abstract: In at least one embodiment, for producing segments of tubular jackets, a strip-shaped sheet material is continuously reshaped transverse to the strip axis into a closed form and following the welding of a longitudinal seam, jacket sections are cut off the jacket strip. In at least one embodiment, a support edge is provided on the inside of the continuously formed jacket strip for the cutting operation, essentially in the form of a closed circle and extending in a normal plane to the longitudinal axis of the jacket strip, which fits directly against the inside of the jacket strip and cooperates with at least one cutting tool. The cutting tool is pivoted into the cutting position during the cutting operation along the support edge, so that a cutting region rotates once around the longitudinal axis. A section of the jacket strip is cut off, wherein during the cutting operation, the support edge and the at least one cutting tool are advanced along with the jacket strip.

Abstract: A method for producing strand guiding rollers from prefabricated and semifinished, stored components, which comprise at least roller bearings, prefabricated supporting shafts and semifinished roller shell starting material. The method is intended to produce and deliver a ready-to-assemble strand guiding roller in a short time with minimized stockkeeping costs. Roller bearings are in stock in a type series in accordance with the loads that occur, supporting shafts carrying the roller bearings are in stock in a type series in accordance with the loads that occur, and roller shells are in stock in the form of circumferentially worked bar or tube material in a type series with indeterminate length made to match various roller diameters.

Abstract: Connecting ends on a hose piece comprising several metal layers, in particular a strip wound metal hose piece, are produced by fixing the overlapping metal layers of a hose of larger length or of an endless hose in the region of the point of separation through welding and subsequently cutting off the hose piece from the longer hose or the endless hose. For simple and inexpensive fixing of the metal layers in the region of the point of separation, a welding seam is generated which extends through at least part of the periphery of the hose or about its entire periphery, using roller seam welding. The hose piece can subsequently be separated along the welding seam obtained in this manner, e.g. along its central line, thereby ensuring permanent and reliable fixing of the metal layers in the region of the connecting end.

Abstract: A method of establishing an electric connection between electric terminals of a semiconductor component as part of an electric module and additional parts of the electric module by using a punched grid having internal terminal ends and external terminal ends that are electrically connected to the internal terminal ends by metal strip conductors, the semiconductor component and the punched grid are joined so that at least two electric terminals of the semiconductor component are positioned on corresponding internal terminal ends so that a slip-proof mounting of the semiconductor component on the two internal terminal ends is then possible, this mechanical mounting at the same time establishing an electric connection between the electric terminals of the semiconductor component and the internal terminal ends, whereby a metal strip grid, e.g.

Abstract: Shown is a device and a process for the simultaneous separating and welding of foils or foil tubes (5) where the device comprises at least one welding terminal (2) and an opposing terminal (3), and at least a part of the surface of the opposing terminal (3) turned toward the welding terminal (2) is equipped with a flexible absorbing body (4). It is inventive that the surface of the absorbing body (6) turned toward the welding terminal consists of metal.

Abstract: A method for forming a cylindrical body utilizing a continuous weld is provided. The method includes feeding a source material including a first edge and a second edge from a coil and offsetting at least one of the first edge and the second edge. The method further includes spiraling the material to form a cylinder, welding the first edge and the second edge together forming a continuous weld, and cutting the cylinder to a selected length. To fabricate a jacket, a longitudinal cut is made in the cylindrical body, at least one cutout is cut, and the continuous weld is an outer fillet weld.

Abstract: A method of forming a sputtering target is described that involves bonding a backing plate onto a casement having one or more recesses that contain target material to form a bonded target. During the bonding process, the bonded target is optionally vacuum sealed within the recess. The bonded target is then optionally annealed while under vacuum to form an annealed sputtering target. The sputtering target can then be retrieved by removing at least a portion of the casement from the sputtering target in one or several steps. Also described is a casement having one or more recesses containing bonded target material that is optionally vacuum sealed in the casement. The casement, as well as the backing plate that is optionally bonded onto the casement, are further described as well as other options and methods.

Abstract: Bond-wire cutting device for cutting off the part of a bond wire that extends beyond the bonding contact area after a bonded connection has been produced, with a knife that can be moved with a movement component perpendicular to the surface of a substrate and hence to the bonding contact area, wherein the knife is mounted so as to be yielding with respect to the movement component perpendicular to the substrate surface, so that the force acting on the cutting edge of the knife when the knife encounters the substrate is limited to a prespecified peak value.

Abstract: A method of manufacturing a fan blade (10) comprises forming three metal workpieces (30,32,34). Each metal workpiece (30,32, 34) has a flat surface (38,42,46,48) and is larger than a predetermined size (X) to form excess portions (62,64,66). The predetermined size (X) is required to produce the finished fan blade (10). The excess portions (62,64,66) are located outside the finished fan blade (10). Longitudinally extending slots (68) are formed to interconnect the flat surfaces (46,48) of the excess portions (66). The metal workpieces (30,32,34) are assembled into a stack (36) so that the flat surfaces (38,42,46,48) are in mating abutment. The stack (36) is evacuated from one longitudinal end of the stack (36) such that the slots (68) enable gases at an opposite end of the stack (36) to be removed from the stack (36). Heat and pressure is applied across the thickness of the metal workpieces (30,32,34) to diffusion bond the metal workpieces (30,32,34) together to form an integral structure.

Abstract: The invention relates to an ultrasonic welding and cutting device for use in the manufacture of a flat-cable. The flat cable includes a plurality of wire conductors which are arranged in parallel at a given interval with respect to each other and interposed between first and second insulator films. The device has a product flow line in an upstream to downstream direction. The device comprises a horn unit including a horn melter unit that imparts ultrasonic oscillations, and a horn cutter unit. The horn melter unit and the horn cutter unit are located sequentially from upstream to downstream at a predetermined distance along the product flow line. The device further includes an anvil unit including an anvil melter unit and at least one anvil blade unit.

Abstract: Two beams 17 and 18 perpendicular to a moving trajectory Q are formed in an intake port opening 14 of a cylinder head material to serve as margins for interfering with deformation of the opening 14 due to softening of the material, thereby a deformation of the material and a void caused by the deformation can be prevented in the frictional stirring with the rotary tool.

Abstract: A method for forming a cylindrical body utilizing a continuous weld is provided. The method includes feeding a source material including a first edge and a second edge from a coil and offsetting at least one of the first edge and the second edge. The method further includes spiraling the material to form a cylinder, welding the first edge and the second edge together forming a continuous weld, and cutting the cylinder to a selected length. To fabricate a jacket, a longitudinal cut is made in the cylindrical body, at least one cutout is cut, and the continuous weld is an outer fillet weld.

Abstract: A machining device comprising five axial kinetic coordinate systems that can be controlled simultaneously, three axes of which are linear moving axes and two axes of which are rotary axes, with one axis of the five axes being provided with a tool rotating function, whereby said machining device is equipped with a cutting tool 51 and a friction stir welding tool 52. The current value observed when a large-diameter portion of said tool 52 contacts the work object is set in advance, and by observing the torque current of the rotary shaft of the tool 52 during friction stir welding, the insertion depth of the tool 52 can be controlled by maintaining the observed torque current above the preset current value, thus providing a good weld. A single device can provide both the cutting and the welding. Thus, it is possible to reduce equipment cost, installation space, plant area, lead time and production cost.

Abstract: Process for producing a middle electrode with precious metal reinforcement, a middle electrode being used with an ignition tipwhich is tapered relative to the middle electrode body, such that a precious metal wire with a cross section which corresponds to the tapered ignition tip is welded flat onto the tapered ignition tipand such that this precious metal wire is cut off at the desired height, with a sharp edge.

Abstract: A friction lining for use in the clutch plate of a friction clutch or a multiple wrap brake band for use in an automatic transmission is obtained by adhesively securing one side of a friction generating second layer to one side of a metallic first layer. The necessary incisions in the form of cuts, slots or slits are made from the exposed side of the second layer in a direction toward the exposed side of the first layer by resorting to one or more high-energy streams, such as laser beams, electron beams or liquid jets. Each incision can be made in one or more stages by a single stream or by a series of successively applied streams.

Abstract: An arrangement and method for the insertion the leading end of a length of a metallic element into a through hole which is formed in a substrate, and for heat deforming the inserted leading portion of the metallic element into a predetermined configuration prior to severing therefrom the remaining length of the metallic element.

Abstract: Link arms for use in suspension systems are produced through an extrusion and friction stir welding process. Blocks having an eye and a planar body section are formed through an extrusion process. These sections are then paired together and joined through friction stir welding. The welded joint(s) is/are positioned in such a location so as to not impact the structural integrity of the completed component. Through this process it is possible to construct cost competitive link arms having the same or better structural integrity as previously employed steel link arms while achieving dramatic weight reductions.

Abstract: Preforms for use in base metal repair are formed by thermally spraying preferably a blend of a braze alloy and a high temperature alloy onto a separation sheet thereby forming a preform sheet. The separation sheet is removed from the preform sheet and the preform sheet is cut to form individual preforms which can be brazed directly onto a worn area of a high temperature alloy part such as a jet engine part.

Abstract: Side hole-bearing tubular bodies made of metal and having an inside diameter of up to 2 mm are manufactured by a method which includes punching from a metal sheet a sheet blank in the developed shape of a tubular body and punching in the sheet blank a hole which corresponds to the side hole in the tubular body and/or notches which form the side hole when the sheet blank is pressed into, a tubular shape, in such a way that the metal sheet and the sheet blank remain partly joined; pressing the sheet blank into a tubular shape; and cutting apart the metal sheet and the sheet blank where they remain joined. Metal tubular bodies manufactured in this way can have one or more side holes of any shape, position or number thereon, and are highly suitable for use in medical devices such as syringe needles.

Abstract: The present invention provides a method for molding an assembly panel by manufacturing a blank for a main panel and a blank for a reinforcing panel; temporarily welding the blank for the reinforcing panel to the blank for the main panel along a predetermined welding line; holding the two welded panels in a press and molding the same into a predetermined shape; trimming scraps from the main panel; and spot welding the two panels so that the two panels adhere to each other more firmly.

Abstract: A method and apparatus for producing a three-dimensional part from a plurality of planar layers using an ultrasonic welder. A sheet of planar material is placed on the partial part and ultrasonically welded, with the first sheet placed on a base. The sheet is cut to the shape of the partial part. The process of placing of the sheet materials on the partial, welding, and cutting of the two-dimensional contour layer is continued until part is complete. In a preferred embodiment, the three-dimensional part has layers of different material. The materials can be layers of incompatible materials for ultrasonic welding in which voids are created through interposed non-compatible materials for ultrasonic welding, to allow ultrasonic welding of compatible material layers spaced by a sheet of incompatible material.

Abstract: A hollow piston for use in a compressor includes a first piece and a second piece. The first piece has a skirt, which is to be engaged with a swash plate, and a cylindrical portion. The second piece is coupled to the first piece to cover an opening formed in one end of the cylindrical portion. A work includes a pair of the symmetrically arranged first pieces, which are coupled to each other at the skirts. The work is held against rotation about its axis and against axial movement. In this state, the second pieces are friction welded to the ends of the work. During friction welding, the second pieces are rotated in the opposite directions while being simultaneously pressed against the opened ends of the hollow cylindrical portions. As a result, deformation of the produced pistons is prevented.

Abstract: A method of making a segmented mold utilizing a first number of matrix sections employed with a second number of inserts which cannot be equally divided by the number of matrix segments.

Abstract: The present invention relates to an apparatus for mass production of metal substrates used in catalytic purification of exhaust gas, which comprises: (a) an uncoiler part for continuously feeding a strip in the lengthwise direction, wherein said strip is coiled along the rotation axis; (b) a tubing processing part for changing the strip into the shape of a pipe by means of gradually putting pressure through multi-stage rolls onto the both side edges of the strip in feed from said uncoiler part; (c) a feeder part, which is installed at one side of said tubing processing part, for feeding a pre-made honeycomb body at an equal interval to the strip being changed into the shape of a pipe; (d) a welding part, which is installed at the rear end of said tubing processing part, for welding into a unit the both side edges of the strip in feed after being changed into the shape of a pipe; (e) a sizing part, which is installed at the rear end of said welding part, for evening the girth of the pipe in feed; and (f) a cut

Abstract: A machining device comprising five axial kinetic coordinate systems that can be controlled simultaneously, the three axes of which are linear moving axes and the two axes of which are rotary axes, with one axis of the five axes provided with a tool rotating function, said machining device equipped with a cutting tool 51 and a friction stir bonding tool 52. The current value observed when a large-diameter portion of said tool 52 contacts the work object is set in advance, and by observing the torque current of the rotary shaft of the tool 52 during friction stir bonding, the insertion depth of the tool 52 can be controlled by maintaining the observed torque current above the preset current value, thus providing a good bond. A single device can provide both the cutting and the bonding. The present invention enables to cut down equipment cost, installation space, plant area, lead time and production cost.

Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.

Abstract: By utilizing a roll bonding process and appropriately forming steps, a load bearing structure is created which is capable of handling and appropriately transferring loads. One preferred method includes the combination of roll bonding and hydroforming to efficiently create structural components. While various product configurations are possible, one version includes a waffle-type structure produced by appropriate roll bonding of material sheets. This waffle-type structure can also undergo additional forming steps to create several structural components capable of handling and carrying loads in a very efficient and effective manner. More significantly, this process enables the use of structural aluminum for load bearing components which are efficiently and cost effective when manufactured.

Abstract: A thermally enhanced semiconductor package includes a sheet metal cap having flexible flanges provided with solder contacts for reliable attachment to a circuit board. The package assembly further includes a semiconductor chip with a contact-bearing front surface facing forwardly, and chip bonding contacts overlying the front face of the chip. The flange bonding contacts are coplanar with the chip bonding contacts, or can be brought into coplanar alignment by flexure of the cap. The package can be surface-mounted to a circuit board by placing the package onto pads of solder paste, and then heating the assembly to melt the solder paste in order to join the bonding contacts on the chip and on the flange to corresponding contacts on the circuit board.

Abstract: A rod material made of Ti alloy has a larger diameter portion at the end, which is joined with the end of material made of Ti—Al intermetallic compound, by friction welding, to form a poppet valve for an internal combustion engine. Instead of providing such larger diameter portion, the end of the material made of Ti—Al intermetallic compound may be heated to facilitate joining.

Abstract: To provide such a boss welding structure for the arm of a working implement as is light in weight and easy in manufacture.

Abstract: A plurality of materials are rolled in an upstream stand. While transfer speed of a succeeding material and the front end position thereof are detected, the transfer speed and the rear end position of a preceding material are detected by a measuring roll. The transfer speed of the succeeding material is controlled by adjusting at least the drive speed of the pinch rolls so as the front end of the succeeding material to contact with the rear end of the preceding material at a specified position in a travelling welder. the rear end of the preceding material is joined with the front end of the succeeding material by flash-butt welding using the travelling welder to form a continuous material while letting the travelling welder move at a speed synchronous with the transfer speed of the continuous material. The welded portion on the continuous material is ground and/or cut to remove burr therefrom.

Abstract: A 5-ply composite metal product for the manufacture of cookware is provided which contains a relatively thick copper core having relatively thin layers of pure aluminum bonded between outer layers of stainless steel. The cooking vessels made therefrom may contain a decorative groove or skived ring around a perimeter of the vessel, formed by machining away the outer layers of stainless steel and pure aluminum to visually expose the copper core.

Abstract: A laminated structural panel is formed of top, bottom, and one or more intermediate layers of material having low strength at high temperature and with perforated high temperature, high strength materials interleaved between the top, bottom and intermediate layers. Brazing material is clad on the top and bottom layers and the intermediate layer or layers may be entirely of brazing material or clad on both sizes with brazing material, such that when the assembled stack is subjected to high temperature in a high vacuum environment brazing material is caused to melt and fill the perforations in the high strength material. A particular application is for structural panels, used as shelves in manufacturing electronic chips or displays where aluminum is advantageous because it does not outgas or release particles under the high temperature, high vacuum environment used to make the product. Aluminum, however, does not maintain its strength and stiffness at the high temperatures involved.

Abstract: There is provided a method of forming a high strength atomic bond between a sputter target and backing plate such that the microstructural characteristics of the sputter target material obtained by prior processing is not altered by the bonding process. There is further provided a method for bonding the target to the backing plate and forming a bonded target/backing plate assembly having a greater target thickness for increased sputtering life, while maintaining the overall standard dimensions set by industry standards.

Abstract: An object of the present invention is to provide plate width center alignment method and apparatus for a welding machine, which can dispense with a detection driving device, which is simple in construction but can perform the detection from a position closest to a cutting-welding position, and which is high in plate width center alignment accuracy. Plate side edge detectors which are included in a plate width center alignment means for detecting plate widths of two cut plates and aligning plate width centers with each other, and which detect widthwise plate side edges of the two cut plates, are disposed on a movable frame provided with a cutting means and a welding means, elongated in the width direction of a web and movable in that direction.

Abstract: A weld bead chopper is provided, for use in combination with a scarfing tool which is intended to scarf a longitudinal weld bead from a tube. The chopper has a) a chopper blade which is rotatable about an axis which is substantially perpendicular to a longitudinal axis of the tube, and b) a stationary blade which is cooperable with the rotatable blade. The cooperating chopping surfaces of the rotatable and stationary blades are at a short distance from the weld bead, e.g. less than 100 mm, and preferably from 20 to 50 mm. The scarfed weld bead enters an enclosed throat which has walls to guide a scarfed weld bead towards the cooperating chopping surfaces. The throat has a first guide adjacent to the scarfing tool which directs the scarfed weld bead towards a second guide. The second guide faces the scarfing tool, and is adapted to guide the scarfed weld bead towards the cooperating chopping surfaces.