Abstract: An object of the present invention is to provide a bending method for a multi-layered pipe according to which a multi-layered pipe can be bent while maintaining a stable gap between an inner pipe and an outer pipe and between outer pipes. In this method, an inside mandrel is inserted into the inner pipe of the multi-layered pipe, a tubular outside mandrel is inserted into the annular space between the inner pipe and outer pipe, the multi-layered pipe is clamped to a bending die by a clamping die, the multi-layered pipe is held at the rear of a bending portion of the multi-layered pipe by a pressure die and a crease-removing die, and the multi-layered pipe is bent by causing the clamping die to revolve around the bending die.

Abstract: A method for making a beam from a metal sheet (10), includes the steps of providing a metal sheet having opposite first and second side edges (12, 14) extending longitudinally along opposing sides of the metal sheet, and a first and a second generally parallel opposing face surfaces (16, 18) provided between the first and second edges. The first and second generally parallel opposing faces define a thickness of the metal sheet therebetween. The thickness of the metal sheet is split at one of the first and second side edges to form first and second integral flanges (28, 30, 32, 34) from a portion of the metal sheet such that inner ends of the first and second flanges remain integrally connected with an unsplit portion (44) of the metal sheet. The first and second flanges are then bent so as to provide the metal sheet with a tubular portion extending along one side of and integrally formed with the unsplit portion. The first and second flanges are then fixed against movement relative to one another.

Abstract: A method of manufacturing loading plane border frame tubes for chairs utilizes continuous roll-forming processes to roll a base material to form loading plane border frame tubes for use on chairs. The processes include: transport a steel sheet to a roller leveler for flattening; then roll the steel sheet through a first roller calender, a second roller calender, a third roller calender, and a fourth roller calender to form a semi-finished tube; send the semi-finished tube to a high frequency generator for welding and soldering at high temperature; trim the semi-finished tube in a trimming machine; and roll the semi-finished tube through a fifth roller calender to form a finished tube of a selected shape for making border frames of loading planes of the chairs.

Abstract: The invention relates to a method for manufacturing an aluminum tube, an aluminum tube for further processing in at least one subsequent deformation process, as well as the use of the aluminum tube. The object of providing a simple method for manufacturing an aluminum tube with elevated deformation potential is solved by texturing the outer surface of the aluminum tube using temper rolls. The application of a texture using temper rolls yields a sufficiently high roughness on the surface of the aluminum tube on the one hand, so that the strain can be increased in subsequent deformation processes. On the other hand, while the roughening of the surface can be integrated into existing manufacturing processes, e.g., for straight bead welded or extruded aluminum tubes a swift and easy manufacture of the semi-finished product is enabled.

Abstract: The invention provides a method of forming a T-shaped pipe (60) or tube connecting section, also referred to as a T-connector, T-junction or a T-section. The method comprises the step of cutting a form out of sheet metal, the form substantially comprising a rectangle having extensions on each side arranged in two pairs of opposing extensions (2) followed by the step of bending the edges of a first pair of opposing extensions (6a, 6b) together to form a body having a central passage extending through the body in a first plane and a further passage (64) extending from the exterior of the body to the central passage in a plane orthogonal to the first plane. The invention also provides apparatus arranged to form a T-connector.

Abstract: Process for making jewels such as necklaces, bracelets or the like with different colors on at least two of their faces in sight so that a user can choose to put on the necklace or jewel so as to show one face or the other of the jewel according to the wished color, for instance the user can show a white gold face or a yellow gold face. In general, the process in question consists of a first phase in which noble metal bands (3, 4) showing different colors are put near each other. Then, the bands (3, 4) are coupled by welding (6) and are subjected to a second working phase in which they are bent and welded longitudinally so as to obtain a pipe (19) showing a multiple color. From this pipe (19) it is possible to obtain hollow links to be then mounted and fixed on a flexible core.

Abstract: A method of manufacturing pipe body by which pipe body with precise quality and closely contacted seam can be made stably by pressing process, and pipe body manufactured by the method are provided. To manufacture a pipe body 1 made of metal with circular or polygonal cross section comprising a seam 5e and a wall 2 or plurality of walls 2, 3 and 4, a pipe-like intermediate product 14 is made by bending a metal plate 6 of which edges to be seam 5e have not yet contacted together. In case for prism pipe, the intermediate product comprises walls 5a, 5b to be contacted and be a wall including seam, and other walls, and both angles of both ends of one specified wall 15 of the intermediate product are larger than those of completed pipe.

Abstract: A container, in particular a container with a tube-shaped wall, made of a light metal alloy for use as a reaction chamber in a process for manufacturing wafers. The container wall is made by way of extrusion or ring-rolling, and the container wall is made from a metallic, aluminum-based material with a magnesium content between 1.2 and 2.0 wt. %. The elements Cu, Fe, Si are present in amounts less than 0.5 wt. %. This container wall may also be shaped in one piece as container with a base plate.

Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.

Abstract: Thin walled compartmented tubular structure and its manufacturing process.

Abstract: A process for producing an angled bore in a component, wherein a straight bore is first let into the component and, after the straight bore is let into the component, this component is deformed so that an angled bore course is produced.

Abstract: In a method of manufacturing a helically-wound lock-seam tube for a ventilation duct system, the tube is provided with a plurality of air nozzles through its wall. The method involves the steps of: feeding a strip of sheet metal from a supply to a punching and pressing unit; punching and pressing the strip in the punching/pressing unit to form two rows of spaced openings through the strip; feeding the punched strip to a roller unit, in which a longitudinal bead is formed in the strip; feeding the punched and beaded strip to a forming head in which the strip is helically-wound to form a tube having a helical lock seam; feeding the helically-wound lock-seam tube out of the forming head; and cutting the tube into desired lengths. The apparatus has components for carrying out the various method steps, and the finished tube is provided with a desired pattern of air nozzles.

Abstract: The invention relates to a method for producing hollow nickel titanium profiles with a small external diameter and/or small wall thickness by means of deformation, especially extrusion. According to the inventive method, a composite block is formed, comprising a solid core and one or several hollow blocks surrounding said core. The core and the hollow blocks are made of nickel titanium. The parts of the composite block are separated after deformation to obtain a wire (3a), a tube (1a) with a small diameter and a tube (5a) with a larger diameter.

Abstract: Apparatus for and method of extruding a metal pipe having a substantially uniform inner diameter. The forward and rearward end sections of the pipe are thicker than the middle section of the pipe. A heated metal billet having a cylindrical longitudinal bore is inserted into the rear opening of a cylindrical bore of a stationary container. A two-part removable inner die is located within the bore of the container adjacent the forward end of the container and an outer die is located outside of the container adjacent the front end of the container. The inner die has a relatively small diameter cylindrical bore. The outer die has a relatively large diameter cylindrical bore. The billet is moved along a central longitudinal axis within the bore of the container by a press which includes a circular forward pressing surface and a mandrel extending forwardly from the pressing surface toward the billet.

Abstract: The invention provides a machine and methods for automated manufacture of tapered adjustable ducts, and particularly tapered adjustable take offs. A tube of material is cut into gores of predetermined configuration, coupling beads are formed in the gores and the gores are adjustably interconnected to one another to form the finished take off duct in an automated fashion. The apparatus for forming an adjustable duct member may include a housing including at least one work station formed therein. A die associated with the work station is selectively positioned at a predetermined location relative to a work piece positioned in association with the work station. A cutting and forming assembly associated with the work station cooperates with the die to selectively cut the work piece to form first and second members and to form a coupling bead in the first and second members which cooperate to reconnect the first and second members together at a predetermined angle.

Abstract: Apparatus for forming tapered spiral tubes from strips, is disclosed. The apparatus comprises a spiral tube forming system for forming a strip into a spiral tube; a strip infeed system adapted for feeding a strip to the pipe forming system; and computer-controlled means for continuously varying the angular orientation of the tube forming system relative to the strip infeed system to selectively vary the diameter of the forming tube. The selective variation of the diameter includes linearly tapered and curved profiles, as well as constant (unchanging) diameter profiles and combinations thereof.

Abstract: In an annular member forming apparatus including: a forming roll rotatable in contact with an outer cylindrical surface of an annular workpiece; a mandrel relatively movable towards and away from the forming roll in contact with an inner cylindrical surface of the workpiece; and an outside diameter detecting device for detecting an outside diameter of the workpiece which is to be worked, the apparatus further includes a moving device for moving relatively the forming roll and the mandrel and for pressing the workpiece by the forming roll and the mandrel moved towards each other to subject the workpiece to rough rolling and to finish rolling. The moving device includes a retracting device for correcting an elastic deformation of the forming roll, the mandrel and the moving device occurring during the rough rolling, for a switching time from the rough rolling to the finish rolling by an output signal from the outside diameter detecting device.

Abstract: Method for manufacturing a brake pedal body for motor vehicles, of the type which comprises obtaining them, by mechanical means, of a flattened tubular shape and irregular in at least one direction and fitted with a passage for the body articulation axis; characterized by obtaining a frustoconical tube, bending it into a predetermined shape and then flattening it in at least one part of the same.

Abstract: A folded tube for a motor vehicle heat exchanger, is made from a metal strip folded on itself so as to form two parallel channels separated by a spacer. The spacer results from the joining of two borders of the strip each being folded at right angles towards the inside of the tube from an outer face. Each of the borders is folded at right angles with respect to the outer face, forming a folded outer edge, and includes a protruding swelling which extends at least on the same side as the outer face of the strip. The invention makes it possible to produce a tube having flat large faces, the continuity of which is assured in the regions close to the spacer and which contributes to better holding of corrugated spacers in the heat exchanger.

Abstract: A fishing spinning reel includes: a reel body; a spool supported on the reel body; a rotor rotatably supported on the reel body for winding a fishing line around the spool; a fishing line guide portion connected to the rotor and movable between a fishing line take-up and a fishing line play-out position; a bail for retrieving the fishing line; and a fishing line introduction portion provided between the bail and the fishing line guide portion. The fishing line introduction portion is formed in such a manner as to have a smooth shape expanding gradually from the bail, and a tightly closed cavity portion is formed in the interior of the fishing line introduction portion.

Abstract: A method for forming a metal tube includes providing a flat sheet of metal, forming features in the sheet, forming a strip within the sheet, the features being disposed within the strip, progressively forming the strip into a barrel, and trimming the barrel from the sheet.

Abstract: A production of tapered bent tube wherein a U-cup with a full opening is pressed to form from a brass plate by a primary mold. The two ends of the full opening of the U-cup are of different calibers. The U-cup is subjected to tempering treatment to eliminate its processing stress. An assembly forming mold is used to punch the fill opening of the U-cup to form a rough shape of tapered bent tube with two different calibers at two ends, and between the two ends with different calibers is a flattened part. The flattened part on the tapered bent tube is removed to form a tapered bent tube; then, the seam of the tapered bent tube is welded and smoothed by roller pressing process, to complete the two ends of different calibers.

Abstract: A method is proposed for producing a metal tube (1) with one or several optical fibers (2) extending therethrough. Metal (10) applied to the surface of a frictional wheel (11) is conveyed to a retaining space (12) by applying pressure and temperature. The metal (10) subsequently exits from the retaining space (12) through the annular exit opening (16) of a forming nozzle (17) in a direction which is approximately tangential to the circumference of the wheel, and solidifies to form the metal tube (1). The optical fibers (2) are passed through a feed opening (19) disposed in the center of the forming nozzle (17), with all sides of the optical fibers spaced apart from the exit opening (16). The tube forming process is repeated to form an outer metal tube (4) on the metal tube (1) with the optical fibers (2) disposed therein.

Abstract: A method of manufacturing pipes having sections with different wall thicknesses from an initially plane sheet metal in which a starting sheet metal is subjected to a rolling deformation so as to intentionally produce areas of different wall thicknesses in rolling direction. Subsequently, the rolled sheet metal is cut to size as required. The intermediate product obtained in this manner is then shaped into a pipe and the abutting edges are then joined together.

Abstract: A method for producing at least one capillary in a moldable material. The capillary has a large length in relation to its cross-section. A closed cavity is created within the moldable material and the material is stretched in at least one direction so that the cavity forms a substantially elliptical or parabolic capillary whose length is large in relationship to its cross-section. The material may be heated before stretching so that the cavity is expanded and shaped into an essentially spherical form. Suitable materials for the practice of the invention include glass, plastic, quartz, silicon, or metal.

Abstract: This invention relates to a method of extruding pipes on horizontal presses, and in particular relates to a method of extruding pipes wherein a removable centering plug is provided to prevent displacement of the central guide rod during the initial stages of pipe extrusion. The centering plug is adapted to fit around the guide rod and within the extrusion orifice. The centering plug is concentrically fitted within the extrusion orifice and is capable of being extruded through the extrusion orifice.

Abstract: An improved forming station and process for use in tapered tube manufacturing apparatus and process where fully synchronized output motion of multiple slave axes on adjustable rolls are scaled to the external process input of the master axis so as to generate continuously moving output process position synchronized to the asynchronous process input.

Abstract: A process for progressively manufacturing cutting edge needles or wire members. Needle blanks or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of coining dies and at least one trimming die, wherein the first coining die is an open coining die and the one or more successive coining dies are closed coining dies. The needle blanks or wire members are optionally curved, heat treated and electrochemically treated resulting in cutting edge needles or wire members formed without a grinding step and without adversely affecting point ductility.

Abstract: A method and apparatus for producing tapered, cylindrical poles from trapezoidal metal strips. The process is comprised of the steps of curling or pre-forming a trapezoidal blank, then forming the pre-formed blank into a tubular shape by means of a shovel die. The tubular shaped blank is then welded along a longitudinal seam such that a tubular pipe is formed. The resulting tapered cylindrical poles are typically used around highways, parking lots and playing fields to support lights or signs. The process can also be used to form thin wall cylindrical pipes.

Abstract: Method of obtaining hollow forgings by radial forging of solid blanks where generating AA of the surface of solid blank (1) or its edge is oriented longitudinal axis CC of the working surface of forging tool (3) and blank 1 is swaged in a radial direction by at least one pair of forging tools (3) first in one direction with its subsequent rotation around longitudinal axis OO and/or is moved along axis OO, is swaged in another radial direction at defromation rates approximately within 3-8% of the current cross-sectional dimensions of blank (1) with the result that the width of the contact area element is approximately within 0.121-0.124 of said current cross-sectional dimension of blank (1).

Abstract: A sleeve-shaped printing sleeve for a form cylinder of a printing machine is fabricated from a blank of metallic material by cutting the blank to a width corresponding to the form cylinder and to an intermediate length which exceeds the circumference of the intended printing form cylinder. Additionally, the blank is provided with aligning indicia in the regions between each edge of the intermediate-length blank and the corresponding edge to be defined by cutting. Thus, these regions lie outside of the printing area. The blank is bent circularly, held in exact register in a bending/welding device, and cut to the length required for the intended form cylinder by laser beam cutters. As a result of this cutting operation, two waste pieces are produced. The waste pieces are removed and the now defined plate edges forming the beginning and end of the printing form are positioned opposite one another without overlap and welded together, preferably by a laser.

Abstract: A metallic strip having at least one surface enhanced with a texture pattern is formed into a welded tube. A fin insert shapes the edges of the metallic strip prior to welding and minimizes the formation of a protruding weld bead. The longitudinally running edges of the metallic strip adjacent to the enhancement are angled so that the unenhanced portions of the strip edges contact during welding. By having the unenhanced portions contact, fluctuations in metal volume during welding are reduced. This reduces weld instability.

Abstract: In a preferred embodiment, a method and apparatus for forming thin-wall tubing for later welding of the seam thereof which includes tightly rolling upon itself a sheet of thin metal stock about a roller between layers of a flexible fabric. When released from the roller, the sheet metal springs back to form a near-perfect tube without the kinks, scratches, and/or dents commonly caused by conventional rolling methods.

Abstract: There is provided a method for the manufacture of a welded tube having an enhanced inner wall. A fin insert shapes the edges of a metallic strip prior to welding and minimizes the formation of a weld bead inside the tube. The portion of the edge of the metallic strip adjacent the outer surface of the tube is formed to a first angle, while that portion of the edge adjacent an inner wall of the tube is formed to a second, lesser angle.

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: The invention relates to a method of manufacturing a tube, comprising the application respectively to one side of a metal strip 1 a first layer 2 of a first metal which is brazeable and to the other side of the metal strip 1 a second layer 3 of a second metal which is different from the first metal, and, after application of said layers 2,3, rolling of the strip 1 in order to form a tube having at least two walls.

Abstract: A bushing having an outer sliding surface is produced by a die forming method without machining. A crowning shape is provided to the outer surface so that the outer diameter of the bushing is smaller at its opposite longitudinal ends, and increases progressively toward a central zone of the bushing. A cylindrical bushing blank is fitted on distal end portion of a vertically-movable mandrel. Next, one of an upper die and a lower die is reactively moved toward the other to plastically work the bushing blank by the both dies and the mandrel, thereby working the bushing. An inner diameter of the upper die is larger at its lower end, and decreases progressively away from the lower end, and an inner diameter of the lower die is larger at its upper end, and decreases progressively away from the upper end.

Abstract: An inner sliding surface layer of a bearing bushing is formed into a crowning shape in an axial direction by a die shaping method. A bushing blank fitted on a generally-tapered lower end portion of an upper mandrel is inserted, together with the upper mandrel, into a hole in a forming die, and the bushing blank is deformed between the forming die, the upper mandrel and a lower mandrel having an upper end portion similar in shape to the lower end portion of the upper mandrel, thereby obtaining the bushing having the sliding inner peripheral surface of a crowning shape.

Abstract: A steering-column body tube for a motor vehicle is provided from a blank cut-out of a single metal sheet with which is formed two front fixing lugs, two rear fixing lugs, and a tube. The elements of the blank cut-out are rolled over in such a manner as to bring the edges of the tube together to form a tube possessing a front opening and a rear opening at the location of the front and rear fixing lugs. The fixing lugs, together with the tube, are a single part made as one piece. A linkage arm connects a front element of the tube with a rear element of the tube.

Abstract: An apparatus for use in a vibration damping assembly includes a bushing that is die formed from a steel blank. The bushing is formed to have a substantially tubular shape with an interior surface defining an inner cavity into which moving rods can be inserted, an exterior surface, and a joint having a first edge in overlapping contact with a second edge to form a contact surface. The joint formed by the contact surface between the first and second edges extends between the exterior surface and the interior surface of the bushing.

Abstract: A method of forming a tubular, double wall, air gap, exhaust duct component for an internal combustion engine, the resulting exhaust duct component, and the blank for such, involving providing an inner membrane duct element, with orifices therethrough spaced along its length, providing an outer structural duct element in 360 degree engagement with the inner duct element in the areas where forming and bending operations are to be performed, conducting such forming and bending operations, securing the resulting blank in a hydroforming die cavity, sealing the ends of the inner element to the ends of the outer element, plugging the ends of the inner element, injecting a liquid, preferably water, into the inner duct element and increasing the pressure on the liquid to expand the outer element away from the inner element and ultimately into conformity with the die cavity while the inner element floats in place, in a manner to create an air gap substantially over the full length of the duct component, i.e.

Abstract: A method is provided for the production of nodes for tubular truss structures comprised of tubular leg elements connected together by transverse tubular brace elements by means of intermediate joint elements each including a connecting stub element between said leg and brace elements, the improvement wherein said stub element is prepared by the following steps from a steel plate:(a) bending said steel plate to a U-shape to form a steel piece having a curved portion;(b) heating said curved portion of said steel piece;(c) forming a protuberance on said heated portion of said steel piece by cooperative action of said piece with a female die;adjusting the radius of curvature of the thus-formed piece to correspond to the radius of curvature of the leg element;(e) forming an aperture on said thus-formed piece along the centerline of said protuberance; and(f) extruding the thus-formed and pierced piece to the desired final shape of said stub.

Abstract: A glide support assembly for adjustably mounting a glide on an article, such as a divider panel for dividing a building into a room area. This particularly relates to the details of a support tube arrangement which is inexpensively constructed from sheet metal and is rolled into a tubular form. An upper portion of the tube is provided with axial lances while below the axial lances there are transverse lances which serve to support a washer which restricts the penetration of the upper portion of the tube into the article. In order to save metal, the lower portion of the tube is of a reduced diameter.

Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled so that the surface having the wick layer serves as an inner surface, thus forming a pipe shape, then the pipe wall is corrugated. According to the above process, the wick layer is completely and uniformly attached to the inner surface of the heat pipe.

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: A method of fabricating elbow conduit including constructing a conduit development having a set of sequential segments, each segment having a lateral axis parallel to corresponding lateral axes of the other segments and a longitudinal axis skewed at least in part with respect to the lateral axis and having the same orientation as the corresponding longitudinal axes of the other segments in the set. The segments are joined end-to-end and the dimensions of the joined segments are transferred to a continuous length of material to generate a continuous blank havng periodically varying opposing boundaries. At least one outer alignment mark is defined on each segments of the blank to establish an outer ridge line on the outside circumference of the elbow and at least one inner alignment mark is defined on each segment to establish an inner ridge line on the inner circumference of the elbow.

Abstract: A method for providing a tubular node in framework truss structures, such as offshore platforms for oil drilling and production activities of the type consisting of interconnected legs and braces of steel tube elements. For formation of the transition between leg and brace in the node is utilized a blank of rolled plate steel, which is given the desired curved shape corresponding to the curvature of the leg. The blank is pressed or extruded in a suitable press tool formed with an outwardly extending brace stub at the desired angle, which brace stub is designed for welding to a complementary brace tubing in the framework. Thereafter, the blank with the brace stub is welded into the leg proper and constitutes a wall segment of the leg in the node.

Abstract: A method and a device for the spiral winding of tapes for the continuous production of tubes without a core and having an angular cross-sectional area. A tape is guided centripetally during each bending process along a convexly curved conducting surface situated in the region of the tube being formed, the intake side of which conducting surface is located at the feed level. The centripetal guiding of the tape is suspended when the conducting surface reaches the outlet side for forming the excluding level segment of the tape.

Abstract: A method of forming a pipe fitting of unitary construction having a tubular section with a radial flange at one end of the tubular construction. The method includes forming a solid cylindrical bar, upsetting one end of the bar to form a head thereon, drawing the remaining cylindrical portion of the bar to increase its length and decrease its circumference, upsetting the head to form the radial flange, and forming a bore through the flange and remaining cylindrical portion of the bar.

Abstract: A process for preparing a tape guide cylinder is disclosed, which includes the steps of deep-drawing a sheet metal material progressively to form an elongated cylinder with a bottom, subjecting the resulting cylinder to flange-machining to form a flange at its open end, thereafter removing the bottom of the cylinder, subsequently trimming the flange from the cylinder, and finally subjecting the resulting cylinder at either of its ends to a beat-machining for finishing the shape of the elongated cylinder.The tape guide cylinder thus prepared may further be subjected at its circumference, to a precision finish for providing an outer diameter of less than 6 mm but more than 5.2 mm.