Abstract: Feeding stock used to form a tapered structure into a curving device such that each point on the stock undergoes rotational motion about a peak location of the tapered structure; and the stock meets a predecessor portion of stock along one or more adjacent edges.

Abstract: In the case of a process for the manufacture of contact strips, in particular for electrolyzers (membrane cells), the objective is to provide a solution that allows to create a cheap but also extremely efficient method for the manufacture of such contact strips at a high electrical efficiency. This objective is achieved by applying the roll bonding method to attach a copper strip to a titanium strip.

Abstract: An apparatus forms a sheet into a beam having four exterior walls and a common center leg extending between an opposing two of the walls. The apparatus includes a roll former forming the sheet into the beam cross section, a welding station with top and bottom laser welders, and a weld box fixture having inwardly-biased external mandrels (biased by actuators) and outwardly-biased internal split mandrels (biased by springs) that interact to hold a desired shape of the beam in the weld fixture, and also includes a sweeping unit and cutoff device. By this arrangement, the internal and external mandrels, in combination with a bias of the actuators and springs, control a shape of the beam by flexure and movement of material of the sheet when in the weld box fixture during a welding process of the welder.

Abstract: An apparatus for producing a tailored sheet metal strip, comprising at least one welding station, by means of which at least two sheet metal strips can be welded to one another along their longitudinal edges, and at least two strip feeding devices for respectively feeding one of the sheet metal strips into the at least one welding station, wherein the at least two strip feeding devices and the at least one welding station define a production line. A further-processing station for further processing is integrated in the production line downstream of the at least one welding station in the strip running direction and is equipped with tools for applying reinforcing material, to local points of at least one of the sheet metal strips which are connected to one another, for punching holes and/or for forming at least one of the sheet metal strips which are connected to one another.

Abstract: Disclosed is an apparatus and method for manufacturing a swing-ring plate. More particularly, the apparatus and method for manufacturing the swing-ring plate comprises a bending mechanism that moves a linear plate cut to a certain length from a first side to a second side, and bends the linear plate so as to face both ends thereof each other to form a ring shape; a pre-bonding mechanism that fixes the bent plate in the ring shape and pre-bonds the ends in the horizontal and vertical directions; and a final bonding mechanism that completely bonds the pre-bonded part of the plate by revolving around the fixed pre-bonded plate and positioning so that the top and bottom surfaces of the pre-bonded plate face upward.

Abstract: A clad-rolling mill adapted to produce a metal tube. The clad-rolling mill includes a first and a second clad-roll arranged to jointly form a nip for clad-rolling. The first and the second clad-rolls are adapted to clad-roll one or more metal profiles arranged to form at least one channel for conduction of a fluid. The first and the second clad-rolls are shaped to clad-roll a first and a second portion of the one or more metal profiles to each other, so that the first and the second portions are joined with each other, wherein the first and the second portions form a seal that holds the one or more metal profiles together.

Abstract: A first roller is arranged on one side of a transfer path for transferring flux cored wire solder, and a second roller is arranged on the other side. The first roller has on its outer circumference a guide groove in which the wire solder is fitted. The second roller is provided, with a grooving blade and a feed blade closely contacted to each other. The grooving blade comprises a continuous blade edge on the outer circumference, and the feed blade has on its outer circumference a plurality of engaging claws intermittently formed at a constant pitch. The second roller is driven and rotated to thereby advance and retract the wire solder by means of the feed blade, and thus the wire solder is grooved by the grooving blade.

Abstract: A metal sheet composite comprising an outer metal sheet having a flange which is folded over around a flanging edge; an inner metal sheet which forms a joint with the flange; and a welding or soldering seam which is produced on or in the joint and fixedly connects the metal sheets to each other. A method for joining metal sheets and a device for flanging and welding or soldering are also disclosed. The device includes: a tool head; a flanging member, arranged on the tool head, for roll-flanging or slide-flanging; and a welding or soldering tool arranged on the tool head, wherein the flanging member and the welding or soldering tool are arranged such that the flanging member forms a pressing means for a welding or soldering process which can be performed using the welding or soldering tool.

Abstract: A tapered tube manufacturing apparatus and method of operation comprises an entry station adapted to receive a tapered tube having an open, longitudinal seam with spaced longitudinal edges extending the length of the tapered tube. A feed line section moves the tapered tube from the entry section into a welding station while maintaining the longitudinal seam coincident with a pass center line which defines a direction of movement of the tapered tube through the entry station, the feed line section and the welding station. A pair of squeeze rolls in the welding station move the tapered tube through the welding station where the edges of the seam are heated, squeezing the open seam closed for welding the edges of the seam together, and then move the welded tapered tube into a cooling and transition station while maintaining the welded seam coincident with the pass center line.

Abstract: A machine for continuously forming square tubes includes, in sequence, forming stations suitable for progressively bending a sheet strip, at least one finishing station suitable for further approaching the edges of the bent sheet strip for the final welding and at least one station for closing the square tube. In a forming station, the axes of rotation of the lower rolls of each pair of forming rolls are horizontal and aligned to each other. Each finishing station includes an idle forming roll placed below the square tube being formed; two idle forming rolls, placed at the sides of the square tube being formed, performing movements in opposite directions, parallel to the plane of the sheet strip and two idle forming rolls placed above the square tube being formed, performing movements orthogonal to the plane of the sheet strip.

Abstract: The invention relates to a device (1) for production of a tube (2) with a polygonal, preferably rectangular cross-section, comprising a tube welding unit (3), in which the tube (2) is formed from a sheet metal strip and welded at the resulting jointing position and a rolling unit (4), connected to the tube welding unit (3) in the transport direction (R) of the tube (2), which essentially rolls the tube (2) into the desired polygonal cross-sectional contour. According to the invention, right-angled tubes may be produced with the optimal geometry, whereby a camber rolling unit (5) is arranged in series with the rolling unit (4) in the transport direction (R) of the tube (2), by means of which at least two opposing tube sides (6, 7) may be rolled with a pair of crowned convex rollers (8, 9).

Abstract: Reusable printing forms and thermal image setting on the printing forms is optimized in terms of performance. A method for manufacturing the printing form, in particular a rewritable printing form, having a thermally insulating layer, is distinguished by the fact that the thermally insulating layer is produced by the configuration of individual layers to form a layer sequence as a multilayer system. A printing form which is manufactured by the method according to the invention can have images set on it with a low power image setting device, as it is possible to effectively prevent heat from dissipating in an undesirably pronounced manner, for example into a metallic carrier.

Abstract: A solder foil formed from a material comprising particles of Cu, etc. as metal particles and Sn particles as solder particles by rolling is suitable for solder bonding at a high temperature side in temperature-hierarchical bonding, and semiconductor devices and electronic devices produced by use of such solder bonding have distinguished reliability of mechanical characteristics, etc.

Abstract: Disclosed therein is a filler metal (90) used as a bonding material in bonding technology by brazing and soldering and an apparatus for manufacturing the same. A flux cored alloy filler metal 200 according to a prior art has a problem in that a flux is leaked through a joint 93 during the brazing work or carriage of the filler metal. However, a sealed flux laminated alloy filler metal (100) according to the present invention is a laminated W-shaped filler metal (92) bent several times and having a compact W-shaped section and a flux (51) is filled between overlapped surfaces of the W-shaped filler metal (92), so that the powdered flux (51) is not leaked during the brazing work or carriage of the filler metal. Moreover, an apparatus for manufacturing the filler metal is automated to improve productivity.

Abstract: Disclosed therein is a filler metal (90) used as a bonding material in bonding technology by brazing and soldering and an apparatus for manufacturing the same. A flux cored alloy filler metal 200 according to a prior art has a problem in that a flux is leaked through a joint 93 during the brazing work or carriage of the filler metal. However, a sealed flux laminated alloy filler metal (100) according to the present invention is a laminated W-shaped filler metal (92) bent several times and having a compact W-shaped section and a flux (51) is filled between overlapped surfaces of the W-shaped filler metal (92), so that the powdered flux (51) is not leaked during the brazing work or carriage of the filler metal. Moreover, an apparatus for manufacturing the filler metal is automated to improve productivity.

Abstract: A conveyor for guiding and conveying a plurality of sheet-shaped thin plates in rows arranged side by side to a welding position at which ends of the adjacent thin plates are butted and welded to each other, includes a plurality of conveying paths, which are adjacent to each other, having different conveying surfaces which are placed on a same horizontal plane, and a guide unit disposed between the adjacent two conveying paths for guiding the thin plates on one of the conveying paths with respect to another one thereof toward the welding position. Each of the conveying paths is composed of a plurality conveying rollers, and the guide unit includes guide rollers each having a guide surface for guiding the thin plate on the one of the conveying paths in a state that the thin plate on the one conveying path is partially depressed with respect to the another one of the conveying path.

Abstract: A system and method of fabricating tank car outer jackets are provided that include supporting a plurality of coils of sheet metal on a plurality of coil supports such that the central longitudinal axes of the plurality of coils are generally parallel to a central longitudinal axis of a mandrel adjacent the plurality of coils. A plurality of sheets of sheet metal are unwound from the plurality of coils by rotating each of the plurality of coils generally about the respective central longitudinal axes of each of the plurality of coils. As the plurality of sheets of sheet metal are wound onto the mandrel, adjacent sheets of the plurality of sheets of sheet metal are welded together using a plurality of automated welding torches proximate the mandrel. The plurality of automated welding torches may be coupled for communication with a programmable logic controller.

Abstract: A reformer that includes a housing including a tubular member and an end plate member hermetically joined to the tubular member. The housing defines within it a first fluid flow path and a second fluid flow path in a heat exchanging relationship with each other. A reforming catalyst is disposed within the first fluid flow path. The tubular member has a tubular end, and the end plate member has an abutting rim that contacts with and extends along the tubular end of the tubular member and that is folded together over an entire circumference thereof to define a folded hermetic seam between the tubular member and the end plate member. The reformer can be low-priced and its manufacture is easy and efficient.

Abstract: A vehicle door beam of relatively small profile and high strength. The door beam is fabricated from a web and includes a beam portion and brackets extending from opposite ends of the beam portion. The beam portion includes two lateral portions of the web rolled inwardly into closed configurations, and the two lateral edges of the lateral portions are welded to the beam portion. In an alternative embodiment, a second web is included in the beam portion and is part of both of the closed configurations.

Abstract: An improved apparatus and method for the prevention of deformation and buckling of metal plates during welding processes is disclosed. The improved apparatus and method are used to apply pressure to a welded seam created between two metal plates during the welding process. Pressure is applied to the area of the plates surrounding the welded seam until the welded seam has sufficiently cooled to prevent deformation and buckling of the metal plates.

Abstract: A soldering system which reduces the numbers of steps for paste supply and soldering onto a printed circuit board. A printed circuit board has through holes through which a lead of each provided part is to be inserted. A printing mask is matched with the through holes and a paste receiving plate having holes to which solder paste is supplied corresponding to the through holes is disposed. A printing roller is swept by forcibly rotating it to fill with solder paste, then a printing squeegee follows the printing roller to further fill through holes. Parts are loaded on the through holes and reflowing is carried out on the printed circuit board and paste receiving plate, so that the parts are soldered to the printed circuit board.

Abstract: A welding device has two mutually engaging welding wheels, together with a separating device having a blade with a cutting edge. Two film webs can be welded together in conventional manner using the welding device. The blade is able to separate a projecting length from the welded film, the blade being heated. Heating takes place by a heat bridge, which connects the blade to a heater of the welding device. This economizes a separate heater for the blade.

Abstract: A pipe welding tool for delivering inert gas to the interior of pipes being welded. The tool has a center tube and a pair of clamps extending around the tube that support a number of extendible hinged arms. The arms are collapsible, thus allowing the entire tool to adjust to fit within a pipe. Once in the pipe, the arms are released and tensioned against the walls of the pipe. A nozzle is positioned on top of the tube. A quick connect coupling is located at the bottom of the tube and connects with a gas source providing an inert gas. A hose connects the quick connect coupling with the nozzle. A gas lens, connected to the nozzle, has a plurality of holes around its side wall. When the gas is fed into the gas lens, the gas lens releases the gas through the holes in the lens in a 360 degree planar pattern. When positioned within a pair of pipes adjacent to a seam, the tool can serve to provide inert gas to the interior of the pipes and prevent the pipes from burning.

Abstract: Method and apparatus for the manufacture of large diameter elongated generally conical members in a continuous operation.

Abstract: By pressing a wiping member 37 of a wiper 33 onto a concave curved surface 28 and an upper side flange portion 30 of a squeeze roll 8, spatter is wiped off by the rotation of the squeeze roll. In the wiper 33, the wiping member 37 is fixed to a base plate 36 that is linked via a rotatable arm 35 to a shaft body 34. The wiping member 37 is formed from flannel and an anchor member 39 is provided on the base plate 36 on which the wiping member 37 is fixed. The anchor members 39 of a pair of squeeze rolls are linked under tension by a coil spring 40 so as to press the wiping members 37 against the concave curved surfaces 28. A cooling tube 42 for discharging cooling water is provided to the rear of the squeeze roll in the rotation direction of the squeeze roll.

Abstract: A concave curved surface 28 having an arc configuration with the radius R as seen in a vertical cross sectional view is formed over an entire side surface of each of squeeze rolls 8. Below the concave curved surface 28 is provided a lower side flange portion 29; while above the concave curved surface 28 is provided an upper side flange portion 30. A virtual line that includes the center point of the radius R is provided parallel to a rotation shaft 22 of the squeeze roll 8 and facing the concave curved surface 28. With the distance from the virtual line to the lower side flange portion 29 taken as “a” and the distance to the upper side flange portion taken as “b”, the relationship a<b is established.

Abstract: A rotation shaft 34 of each squeeze roll 8 is rotatably supported by bearings 36a, 36b inside a through hole 35 formed in bearing boxes 23a, 23b. Tapered rolls 37 are provided in the bearings that support the rotation shaft 34. Side surfaces 28a, 29a of both wing portions of the bearing boxes are formed in a tapered configuration and these two side surfaces are fixed by being pressed by side plates 24a, 24b. A spacer 32 is provided between an upper wide diameter portion 34a and each squeeze roll 8 for adjusting the height of the pair of squeeze rolls. By tightening double nuts relative to the bearing boxes, the rotation shaft of each squeeze roll can be adjusted to counter wear in the tapered surfaces of the rotation shaft or in the tapered rolls 37.

Abstract: An apparatus and method for forming slotted wire screens is provided. According to one embodiment, the method involves the steps of (1) providing support ring material; (2) positioning a wire on the support ring material; (3) joining the wire and the support ring material; and (4) bending the support ring material to form a ring of a radius. The steps of joining and bending are performed at substantially the same time. According to another embodiment, the apparatus includes a device for pushing support ring material; a device for providing the support ring material with an adhesive, such as a brazing compound; a device for positioning a wire on the support ring material; a heating zone for heating the support ring material and the wire; and a device for bending the support ring material.

Abstract: In a process for producing longitudinally welded tubes, a metal strip, which is continuously pulled from a supply, is gradually formed into a slit tube and the longitudinal slit of said slit tube is welded. The metal strip (2) is pulled through a plurality of drawing dies (8, 9, 10, 11) arranged one behind the other and having a diameter that decreases in production direction, and in each of the drawing dies (8, 9, 10, 11) is increasingly bent in circumferential direction. The slit tube is closed in a last forming step (15) immediately in front of the welding point.

Abstract: A tubular shape finishing apparatus in a steel pipe manufacturing system which molds band steel in a tubular shape while passing through a plurality of sets of forming roll stands and welds the butt portion by a seam welding unit, the tubular shape finishing apparatus welding the pipe by a seam welding unit, cutting off padding by a bead cutter, finishing and shaping the same into a shape of a desired diameter, and to be about an complete round, and comprising one or two of 3-roll forcible drive type stand or 3 or more roll forcible drive type stands disposed in series.

Abstract: An apparatus for forming an end bumper for vehicles constructed from a single sheet of high-tensile strength steel roll-formed to provide two side-by-side tubular sections. Each section has a front wall, an outer side wall, a rear wall, and an inner side wall, the inner side walls being spaced one from the other and connected together by a web roll-formed integrally with the inner side walls. The front walls each have extended ends overlapping and abutting the web. The extreme ends of the front walls also form an abutting juncture which is welded together and also welded to the web. The bumper has a sweep formed by a sweep-forming mechanism having curvilinear an external guide mechanism and internal mandrels conforming to the outer configuration and inner configuration of the bumper so as to provide a passageway therebetween for receiving the bumper. The bumper is passed through the passageway while the roll-forming of the bumper takes place upstream of the mandrels.

Abstract: An end bumper for vehicles constructed from a single sheet of high-tensile strength steel roll-formed to provide two side-by-side tubular sections. Each section has a front wall, an outer side wall, a rear wall, and an inner side wall, the inner side walls being spaced one from the other and connected together by a web roll-formed integrally with the inner side walls. The front walls each have extended ends overlapping and abutting the web. The extreme ends of the front walls also form an abutting juncture which is welded together and also welded to the web. The bumper has a sweep formed by a sweep-forming mechanism having curvilinear external and internal mandrels conforming to the inner configuration and outer configuration of the bumper so as to provide a passageway therebetween for receiving the bumper. The bumper is passed through the passageway while the roll-forming of the bumper takes place upstream of the mandrels.

Abstract: A conductor attachment wherein each conductor is mounted on a dielectric tape and has an attachment portion that is supported by the tape to an adjacent location a uniform distance from the bonding location and that contacts on a level with the plane of the underside of the tape. One conductor supporting tape has portions of the tape that extend into a central contacting area opening to contact locations at contacting pads in rows remote from the edge. Another supporting tape has window openings at the contacting locations. The conductor ends are brought into the level of the underside of the tape by a manufacturing rolling operation between an elastomer surface roller and a solid backing roller.

Abstract: The present invention is a machine for manufacturing welded steel pipes, in which an edge bending roll for constraining under pressure a strip from its pipe edge portions to the boundaries between the pipe edge portions and its pipe side portions to bend the strip, a first center bending roll for constraining under pressure the pipe side portions to bend the pipe side portions, second to fourth center bending rolls for constraining under pressure the strip from the boundaries between the pipe side portions and its pipe bottom portion to the pipe bottom portion and applying lateral pressure to the pipe from both sides to bend the boundaries and the pipe bottom portion and a plurality of cage rolls arranged on both the sides of these center bending rolls, first and second fin pass rolls for further forming under pressure the pipe, are arranged in order from the stream side to the downstreamside of a roll forming process.

Abstract: A method and apparatus for manufacturing a coiled tubing/electrical cable assembly wherein a strip of metal and electrical cable are simultaneously withdrawn from storage reels and are moved through a manufacturing station where the metal strip is formed about the cable and welded to define coiled tubing. The electrical cable is guided into the tubing by a cable placement tube that also serves to conduct coolant such as air, water, etc. along the electrical cable to prevent its temperature degradation during the manufacturing process. The cable placement tube is of sufficient length to extend past the welding apparatus and through a heat treating furnace assembly and to provide an outlet for discharge of the coolant medium into the coiled tubing cable at a location downstream of the heat treating furnace.

Abstract: There is disclosed a method and apparatus for forming a metallic sheath about a conductor element comprised of a plurality of optical fibers whose length within the sheath is uniformly greater than that of the encompassing sheath. Such forming is achieved by continuously drawing a metallic strip and a conductor element into a forming apparatus, while heating a portion of the metallic strip for temporarily lengthening it as it is being formed about the conductor element.

Abstract: In a method and apparatus of forming a flat metal strip into a tube having generally flat side walls connected by bight portions along their opposite longitudinal edge portions comprising the steps of directing the strip between a pair of form rolls to bend the opposite longitudinal edge portions of the strip into similar generally upwardly curved edge portions; then directing the strip between a second set of rolls which engage the upwardly curved edge portions to center the strip laterally relative to the rolls and bend the strip along its longitudinal center line to form an upwardly rounded bend therealong while maintaining the portions of the strip on the opposite sides of the center bend relatively flat whereby to impart to the strip a V-shaped cross section having a central apex and oppositely upwardly inclined flat legs, each terminating in a laterally inwardly curved edge; directing the V-shaped strip between one or more additional sets of form rolls to increase the circumferential extend of said apex

Abstract: An apparatus for producing an electric-welded pipe by continuously shaping a steel sheet into a tubular form in a hot condition is disclosed, which is characterized by a forming roll arrangement of the constant pass-line type in combination with the downward bending system.

Abstract: The invention relates to a solder carrier comprising a sheet of self-support type, made of a material which does not react to a solder when it is melted, a plurality of small through holes, and solder filling the through holes, each of the small through holes having an end, the area of which is larger than that of the other end. By using this solder carrier, a semiconductor device can be flip-chip-connected to a carrier substrate through a bump method, and solder balls can be formed for connecting the carrier substrate to a multilayer circuit board. The through holes of the solder carrier, each of which holes is to be filled with solder, is formed by etching, and the solder is inserted in the holes under pressure by a roll or the like.

Abstract: A frame-like roller carrier (40) which defines a sizing plane (C) normal to the longitudinal axis (A) of the can bodies is arranged in relation to awelding device (24) in such a manner that the sizing plane (C) coincides at least approximately with a welding plane (B) defined by the welding device. A plurality of sizing rollers (41) are mounted on the roller carrier (40), each for rotation about a roller axis (E) lying in the sizing plane (C). The sizing rollers (41) form a rigid ring of rollers through which the can bodies (1) can be moved. The roller carrier is divided into two half-frames (40), each of which carries a plurality of sizing rollers (41). The two half-frames (40) are adjustably supported on a common bridge (31). At least one of the half-frames (40) is connected to the bridge (31) by an adjusting drive (37) for the adjustment of the sizing rollers (41) carried by it.

Abstract: A die-drawing and/or extrusion device is described for producing uniform and tapered metal and composite tubes from flatstock and for reducing the size of solid stock and formed tubes therefrom, and lamination of compatable materials in one operation. The die comprises opposed die elements having curved helical tracks or grooves which follow a central orifice through which the flatstock, solid stock, tubes, etc., are pulled and/or pushed. Wedge-shaped shaping and alignment elements are positioned in the helical tracks in contact with the dies to align the feedstock with the die orifice, and to prevent the metal sheet or tube, rod, etc., from being drawn in between the tangential surfaces of the dies. The extent of product taper is determined by the pull rate applied to the feedstock in conjunction with the rotational rate of the dies, which can be varied continuously.

Abstract: To make a container with a butt welded longitudinal seam, the side edges of a preformed blank are guided by straight grooves so that the side edges converge at an acute angle. At the point of convergence the side edges are heated to at least to the forging temperature, preferably by a focused laser beam. The side edges are then tangentially compressed before they cool.

Abstract: An apparatus for continuous production of seam-welded steel tubing is proposed. The apparatus includes a series of shaping rolls for shaping a strip taken out from a strip coil into a tubular intermediate product, the roll series including a finpass roll group. The tubular product is subjected to seam welding under the action of a seam welder. Before arrival at the welder, a substantial main part of the preformed tubing with exception of opposing edge zones thereof is subjected to heating by a heater compensate for excess compressive stresses induced in the edge zones, while these zones are subjected to cooling by a cooler for avoiding otherwise formation of disadvantageous edge wavings which would otherwise occur.

Abstract: A method of cladding a nonaluminum core with at least one aluminum cladding strip by preheating both the core rod and the strip with the former being preheated to about 1000.degree. F. to 1300.degree. F. and the latter being heated to about 600.degree. F. to 1000.degree. F. Cleaning the core rod and the strip and passing them through a controlled environment chamber containing a reducing or neutral gas. Lubricating the bonding roll grooves to provide a substantially continuous coating of lubricant thereon. Galling of the aluminum strip or strips to the bonding rolls is resisted as a result of this process.

Abstract: An apparatus for forming a pipe frame for use in a vehicle seat is disclosed in which spring clamps are welded to a rectilinear pipe material of a predetermined length at the predetermined positions thereof, the pipe material is then bent into a required configuration, one of two ends of the pipe material is then compressed to form such a smaller diameter portion as to be insertable into the inside diameter portion of the other end, and the compressed smaller diameter portion of the one end is forcibly inserted into the other end so that the inserted portion of the pipe material is welded.

Abstract: An apparatus for continuously producing electric-welded steel pipes by continuously supplying coiled strips as connected to one another by welding, progressively forming the strip into a tubular shape and high-frequency welding the opposed edges of the strip to form a seam. To produce required small quantities of steel pipes having varying diameters and wall thicknesses, a group of roll assemblies is replaceable by another group within a short period of time. Groups of forming, welding or sizing rolls are mountable on a polygonal bed which is lockable in position after rotation. For replacement, the bed is rotated by a hydraulic motor to bring the desired group of rolls to the proper position quickly.

Abstract: A metallurgical bond at the interface between an aluminum-lithium core alloy and a metallic liner is achieved by first forming a mechanical bond along the interface between the core and liner under moderated temperature and reduction conditions, and then heating the composite without simultaneous reduction to cause diffusion of the elements across the core-liner interface. The result is a metallurgical bond securing the layers together to form a composite which can be worked, shaped, and fabricated by normal reduction techniques into a full range of products without the discoloration and fouling problems otherwise typical of aluminum-lithium alloys.

Abstract: The device comprises several sets of shaped rollers disposed on parallel circumferences. The rollers of one of said sets are gauged and innerly define a circumference the diameter of which is equal to that of the cylindrical box-shaped elements to be shaped. In order to ensure a perfect welding of the cylindrical box-shaped elements, some of the gauged rollers are powered at a constant speed. These powered gauged rollers mesh with each other by means of their respective toothing and only one of them is powered by a powered toothed belt which moves the welded box-shaped elements away from the shaping device.

Abstract: A tube mill for forming heat exchanger coolant tubes has a series of form rolls for rolling flat strip stock into a flat-sided tube with rounded longitudinal free edge portions. After rolling, the free edge portions are heated to a fusion temperature and pressed together between a pair of squeeze rolls to form a weld seam therebetween. The heating is performed by a high frequency induction coil which encircles both the tube and a guide for the free edge portions. The guide is located immediately upstream from the squeeze rolls.

Abstract: An improvement in a continuous rolling mill for forming flat steel strip into tubing. The improvement is a strip preparation station including upper and lower composite roller systems. Each system has end rollers which define a pass path for the strip. The lower end rollers have a support surface for engaging the lower surface of the strip and an outer pocket with a lower transition surface extending between the support surface and the outer pocket. Each of the upper end rollers has an engagement surface for contacting the upper strip surface and an outer flange which terminates below the level of the support surface and extends into the pocket. Each upper end roller has a bevelled working surface adjoining the engagement surface and overlying at least a portion of the transition surface and a portion of the support surface for cold working the irregularities of the strip. A method of preparing a strip for formation into a tube in a continuous rolling mill is also disclosed.