Abstract: Provided are a seamless bent pipe constituted by a bent section and straight pipe sections on both ends of the bent section, with the inside diameter at each pipe end portion being larger than the inside diameter of the bent section, and a welded component comprising a seamless bent pipe and a seamless straight pipe at one or each end of the seamless bent pipe, with the end of the seamless straight pipe to be welded to one or each end of the seamless bent pipe having the same inside diameter as the inside diameter of the seamless bent pipe, as well as methods of manufacturing them. As a result, elements suited for use in pipelines can be obtained, without unnecessarily increasing the wall thickness of the seamless bent pipe and without internal machining of the pipe end portions of the seamless bent pipe after the manufacturing thereof.

Abstract: In a rotor hub manufacturing method, a workpiece is chucked and a hole centering on the workpiece center axis is formed in the workpiece. A sealing member is press-fit into the hole, forming an internal space. A shaft feature is thereafter shaped in the workpiece by cutting work done on the periphery of the workpiece around the hole. The workpiece part including the shaft feature is then cut away from the workpiece to form a rotor hub as a shaft unit.

Abstract: A method for producing hollow profiles provided with different cross sections along the length thereof includes shaping the profiles in a die from one piece of cut metal sheet. According to said method, a convex or concave rounding produced on the edges of a longitudinal section results in material excess or material shortage in the transition regions, thereby preventing the material thinning or thickening in said transition regions during forming.

Abstract: A Cu/Al composite pipe and a manufacturing method thereof are disclosed. The inner layer of the pipe is Cu, and the outer layer is Al. The combinative layer is formed between the two layers due to mutual diffusion of Cu and Al. The raw composite pipe is rolled with single rolling by a planetary rolling machine, wherein the rolling process has the single pass percentage reduction of area of 50%˜95%, an exit rolling speed of 5˜30 m/min, a temperature in the deformation area of 200° C. ˜600° C. The pipe can be used in many fields, such as architecture, refrigeration, air-conditioners, refrigerators, solar energy, water heaters, condensers and radiators, etc.

Abstract: A duct-forming apparatus includes an apparatus frame, a forming piston assembly having a cylinder carried by the apparatus frame and a forming piston extendable from the cylinder. A duct-shaping assembly includes a form die having a form die interior and a forming surface provided in the form die interior; a forming assembly having a plurality of expandable forming sections provided in the form die adjacent to the forming surface; and a plurality of piston openings provided in the expandable forming sections, respectively, and adapted to receive the forming piston of the forming piston assembly. A duct-forming method is also disclosed.

Abstract: A method for manufacture of a multi-layer pipe (5) by means of a bending roller with individual material layers (1, 2) to be combined into the multi-layer pipe (5) being put onto each other, and the multi-layer material thus formed being shaped into a multi-layer pipe (5) by means of the bending roller, and in the final stage of pipe shaping in the bending roller and/or a subsequently used bending machine a material layer (1) acting as an internal pipe being pressed non-positively into a material layer (2) acting as an external pipe.

Abstract: A method for manufacture of a multi-layer pipe (5) by means of a bending roller with individual material layers (1, 2) to be combined into the multi-layer pipe (5) being placed one upon the other, and the multi-layer material thus formed being shaped into a multi-layer pipe (5) by means of the bending roller, and in the final stage of pipe shaping in the bending roller and/or a subsequently used bending machine a material layer (1) acting as an internal pipe being pressed non-positively into a material layer (2) acting as an external pipe.

Abstract: The present invention is a method of constructing a rotary device which as an outer hub and an inner hub disposed within the outer hub. One of the inner and outer hubs is rotatable with respect to the other one of the inner and outer hubs about an axis. A ribbon of material extends between opposite ends and is roll formed to achieve a desired profile of an inner and outer peripheral wall of the inner and outer hub, respectively. The roll formed ribbons of material are each secured to maintain the desired profile and achieve the respective peripheral wall. The inner peripheral wall is inserted inside the outer peripheral wall such that the outer peripheral wall surrounds the inner peripheral wall.

Abstract: The present invention provides a lubricant for hot metal working which is capable of inhibiting generation of white scale, attributed to the lubricant, on the surface of a workpiece material and is capable of improving lubricity to obtain favorable appearance of the finished product. The lubricant for hot metal working comprises a silicate compound used for adding to a lubricant composition mainly containing sodium borate.

Abstract: A method of forming an axle assembly having a hollow member. A hollow member such as a cylindrical tube is formed into a polygonal cross-section having an end portion. Bulkheads maybe located into the hollow member prior or after the polygonal forming step to improve proximate strength and transfer suspension bending moments. The end portions are formed to receive a preformed king pin boss having an end portion of approximately the same size as the frustoconical end. The members are welding together and the king pin and hollow member are bent to a desired axle shape. In another method sequence, the kingpin boss is directly formed into the end of the hollow member.

Abstract: A roll-forming or bending machine is provided for forming an angled or rounded and simultaneously tapered hollow body or similar workpiece from a material blank. The machine has at least one tapered roll and at least one counter element, between which a forming pressure can be applied to the material blank. The one counter element has an elastic surface and is constructed as a bending table for supporting the material blanks, so that the one or more rolls apply forming pressure on the material blank on the bending table. The bending table is guided so that it can move in the longitudinal direction and can rotate about a rotational axis, and the rolls can move perpendicular to the longitudinal direction, allowing a change in the relative position of the roll and rotational axis of the bending table caused by a rotational movement of the bending table to be compensated.

Abstract: A pipe or tube article is disclosed that comprises an innermost layer having a thickness of about 0.001 to about 102 mm (0.00004 to 4 inches) comprising a polymeric composition comprising a terionomer composition made from a parent acid terpolymer composition made from an ?-olefin having 2 to 10 carbons; about 12 to about 60 wt % of an ?,?-ethylenically unsaturated carboxylic acid ester; and about 5 to about 25 wt % of an ?,?-ethylenically unsaturated carboxylic acid having 3 to 8 carbons (based on the total weight of the parent acid terpolymer); wherein about 5 to about 90% of the carboxylic acids are neutralized with a metal ion to provide long lifetime, highly abrasion-resistant pipes for mining and other transportation uses. Methods for preparing the article and transporting abrasive materials through the article are also described.

Abstract: A disposable needle for syringes and infusions includes a tubular needle body (1), one end of which consists of a pyramid needle tip (2), a conical needle tip (4) or the combination of a pyramid needle tip and a conical needle tip, a through-hole (3) communicating with the inner hole of the needle body (1) is provided on the tubular needle body (1) and the conical needle tip (4), or on the other part. The said conical needle tip (4) is solid, hollow or locally hollow. A manufacture of the said needle is also provided.

Abstract: Provided is a method of manufacturing a hollow power transmission shaft, which makes it possible to ensure stable quality even when there is a difference in wall thickness or hardening ratio along an axial direction thereof. A hollow shaft material (1?) is provided with, on an outer peripheral surface (1g) side thereof, for example, a movable induction heating coil (5) wrapped therearound. While a high-frequency current with a predetermined frequency is caused to flow through the induction heating coil (5), the induction heating coil (5) is axially moved to perform induction hardening of the hollow shaft material (1?) from the outer peripheral surface (1g) side.

Abstract: Provided is a drum of a washing machine and method for manufacturing the same in which the drum can be rigidly manufactured at a low cost. The method includes forming a plurality of holes on a surface of a metal plate, bending first and second end portions of the metal plate, rolling the metal plate into a shape of a hollow cylinder and engaging the first bent end portion with the second bent end portion, and curling the engaged first and second bent edge portions toward an inner surface of the hollow cylinder and seaming the engaged first and second bent end portions to an outer surface of the hollow cylinder.

Abstract: A method of machining a tube includes performing an obverse drawing process to the tube, where the obverse drawing process draws the tube in an obverse drawing direction from a first end toward a second end of the tube. The tube is turned around to perform a reverse drawing process, where the reverse drawing process draws the tube in a reverse drawing direction from the second end toward the first end of the tube. The obverse and the reverse drawing processes are alternately performed until the tube is thinned to a desired thickness.

Abstract: A magnesium base alloy pipe having high strength and toughness is provided along with a method of manufacturing such pipes. A magnesium base alloy pipe, wherein the pipe is produced by drawing a pipe blank of a magnesium base alloy comprising containing either of the following ingredients (1) or (2): (1) about 0.1-12.0 mass % of Al; or (2) about 1.0-10.0 mass % of Zn and about 0.1-2.0 mass % of Zr. The novel alloy pipe is manufactured by a method comprising steps of providing the above-described pipe blank, pointing the pipe blank, and drawing the pointed pipe blank. The drawing step is executed at a drawing temperature above approx. 50° C.

Abstract: A method is provided for forming a complexly-shaped tubular structure such as a tapered pillar or other structure for a vehicle body. A sheet metal blank having a longitudinal axis is rolled about the longitudinal axis to form a tubular shape and the side edges of the blank are then welded together to form a tube. The tube is then enclosed in a hydroforming die and pressurized to conform the tube to the shape of the die and thereby form the desired complex shape. The sheet metal blank may be formed by the end-to-end welding together of a plurality of separate sheet metal blanks that differ from one another in characteristic including material thickness, material alloy composition, and/or coating. One or more of the blanks can have side edges that are non-parallel so that the tube will taper in diameter along its length.

Abstract: The invention relates to a head rest carrying element which is produced out of a tubular member and which, can be connected to a seat at one end, and which carries a head rest at its second end. The tubular member is produced by being formed out of a flexibly rolled strip material with a variable wall thickness. Furthermore, the invention relates to a process of producing such a head rest carrying element.

Abstract: The invention relates to a copper-zinc alloy, consisting of (in wt %): from 28.0 to 36.0% Zn, from 0.5 to 2.3% Si, from 1.5 to 2.5% Mn, from 0.2 to 3.0% Ni, from 0.5 to 1.5% Al, from 0.1 to 1.0% Fe, optionally also up to at most 0.1% Pb, optionally also up to at most 0.2% Sn, optionally also up, to at most 0.1% P, optionally also up to 0.08% S, remainder Cu and inevitable impurities, with mixed silicides of iron-nickel-manganese incorporated in the matrix.

Abstract: A bumper system includes a rollformed tubular beam with bracket mounts welded to a rear surface for mounting to vehicle frame rails. The illustrated beam has a continuous tubular cross section for its entire length, and includes a center section, corner-forming end sections, and mounting sections connecting ends of the center section to the end sections. The center, end and mounting sections can be linear or similarly curved or differently curved. The center, end and mounting sections can be similarly or differently locally annealed as part of being tuned to specific impact loading criteria, including annealing all or part of cross-sectional areas. The annealing can be done in-line with a rollforming process, such as to assist with forming tight radii in the beam for meeting packaging/space-related requirements, or can be part of a secondary process for advantageously affecting impact strengths in selected localized areas.

Abstract: [Objective] To provide a method and apparatus for seamless tubes in which the occurrence of material peeling can be prevented even when the skew angle ? and tube expansion ratio are increased. [Means for solution] A piercing-rolling method for seamless tubes using a piercer, which is provided with a pair of cone-shaped main rolls and a pair of disk rolls, each pair being arranged in an opposing manner with a pass line therebetween as a center axis, and a plug whose center axis coincides with the pass line, wherein a billet to be pierced and rolled is advanced while being spirally rotated by a drive rotation of the main rolls; the method of which is characterized in each of the disk rolls being arranged in an inclined state at a fixed skew angle ? to the pass line.

Abstract: A protective sheath for a fluid-carrying tube is made from a larger tube cut into longitudinal tube segments and slice into opposed halves before being re-secured together about the fluid-carrying tube. Slip joints are preferably provided between adjoining outer tube segments.

Abstract: A diaphragm bellows includes a spiral-wound, pre-profiled metal strip having neighboring turns which are connected by a continuous welding seam in an area of an outer diameter or inner diameter of the metal strip. Neighboring flanks of the metal strip enter a region of the welding seam at an angle of less than 60°.

Abstract: The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.

Abstract: A tubular metal body 1 comprises a tube 2 extruded through a porthole die and composed of a plurality of components 2b joined to one another with a plurality of joint portions 2a extending over the entire length of the tube. The base material metal of the extruded tube 2 in each of the joint portions 2a is subjected to a modifying treatment to produce finely divided crystal grains. The modifying treatment for the extruded tube 2 is conducted preferably by frictionally agitating each joint portion using a probe 8 of a friction agitation joining tool 6. The tubular metal body 1 is available with an increased length in a larger size and has high pressure resistance.

Abstract: A mast section for a telescoping tower system is made by aligning press brake tools along the length of the metal sheet at spaced width locations and forming the corners of the tube. After forming of the last corner, an opening remains along the length of the tube. The press brake male tool axis is offset sufficiently to permit the tool to apply forming force to the last corner of the tube through the opening, and is sized to remove the tool from the opening. At least three mast sections are nested to form the tower system. Pulleys for a cable extension system are mounted near the upper and lower ends of a wall of an intermediate mast section, with one of the pulleys being oriented at an acute angle to the mast section wall to permit routing of the cable.

Abstract: A process of producing profiles whose cross-section is variable in the longitudinal direction, characterised by the process stages of cutting a blank 31 with a substantially constant width along a longitudinal direction, deforming the blank 31 by deep-drawing to form an open profile whose cross-section is variable along the longitudinal direction, and cutting the flanges projecting from the open profile.

Abstract: Methods for forming a tube that includes a feature extending from an inner surface of the tube are provided. The methods can include using a die and stamper, single impact extrusion, double impact extrusion, and progressive deep draw process.

Abstract: A production line for the manufacture of a product through hydroforming, comprising a decoiler (11) for unrolling a steel strip (12) from a coil (13), a roll-forming unit (14) for folding the steel strip into a tube (16), a welding unit (17) for welding together the edges of the steel strip, a hydroforming unit (18) comprising a mould (19, 20) that ca be opened to receive the completed tube as the tube is being formed and welded, a cutting arrangement (24, 25) for cutting off the completed product (23) that has been removed from the hydroforming unit, arrangements (30-33; 35-39) at the two ends of the mould for sealing the tube, and a line (38) for the supply of pressure medium through one of the sealing arrangements for placing the tube under pressure. The invention relates also to a method for manufacturing a product in such a line.

Abstract: In a method of making a tube, a sheet metal blank is placed in a U-shaped cavity of a lower mold of a shaping tool, and pressed into the cavity by a ram to shape the blank into a U-shaped configuration. In a next process step, the U-shaped blank is formed between an upper mold and a lower mold of a molding press into a tubular configuration. The upper and lower molds of the molding press with accommodated tubular profile are then clamped together and the clamped upper and lower molds are then removed from the molding press. Subsequently, the confronting longitudinal edges of the tubular profile are welded together via an opening that provides access to the longitudinal edges. After separation of the upper mold from the lower mold, another shaping cycle may begin.

Abstract: A bumper system includes a rollformed tubular beam with bracket mounts welded to a rear surface for mounting to vehicle frame rails. The illustrated beam has a continuous tubular cross section for its entire length, and includes a center section, corner-forming end sections, and mounting sections connecting ends of the center section to the end sections. The center, end and mounting sections can be linear or similarly curved or differently curved. The center, end and mounting sections can be similarly or differently locally annealed as part of being tuned to specific impact loading criteria, including annealing all or part of cross-sectional areas. The annealing can be done in-line with a rollforming process, such as to assist with forming tight radii in the beam for meeting packaging/space-related requirements, or can be part of a secondary process for advantageously affecting impact strengths in selected localized areas.

Abstract: A rail system for transporting dual use vehicles includes a network of multiple non-interconnected rails where each rail comprises an extruded triangular shell and a support material. The rails are supported by a system of support structures where each support structure includes a base with a rail adjustment actuator for selectively adjusting the position of the supported rail. Each rail is sized to support a standardized dual use passenger vehicle adapted for roadway and rail travel.

Abstract: A method and apparatus for making a tube having an inverted cross section and the resulting tube made thereby.

Abstract: An apparatus for filtering well fluids and method of manufacture is disclosed. The apparatus comprises an inner support, a filter spirally wrapped around the inner support, and an outer support wrapped around the filter enclosing the filter between the inner and outer supports. The filter has longitudinal edges which overlap and the filter is held in place by friction with the inner and outer supports. The method of manufacturing the apparatus comprises continuously and simultaneously wrapping a filter and outer support around an inner support and disposing the filter between the outer and inner supports.

Abstract: A method and device for manufacturing UOE steel pipes, wherein, when an opening width of the U-can obtained by U-ing press is larger than the die-diameter in an O-press of later step, while said opening is narrowed from the front end by the closing rolls disposed before said O-press and/or at least at the entrance portion of the O-press to be smaller than the die-diameter of said O-press, the U-can is simultaneously conveyed into the O-press, and then, after charging into the O-press, undergoes O-ing press to yield an O-can. The device is preferably configured to have the closing rolls disposed in a roll stand and consisted of multiple pairs, to have a mechanism to prevent the U-can from moving upward during narrowing the opening width, and to have the function of conveying the U-can. Thus, UOE steel pipes for high-strength application corresponding to X80 grade can be efficiently manufactured.

Abstract: A method for manufacturing a surgical needle devoid of a grinding process includes the steps of swaging a needle blank to define a substantially tapered or conical needle end, pressing the tapered needle to form a plurality of intersecting surfaces and forming cutting edges along the lines of intersection of the intersecting sides. The needle may be subjected to an etching process (e.g., an acid bath) to sharpen the cutting edges and/or provide a matte finish on the needle. The needle produced by the novel process is extremely sharp and durable, and exhibits an enhanced retention of sharpness relative to conventional ground needles over periods of prolonged use.

Abstract: Process for manufacturing cylindrical hollow bodies with a circular cross-section using solid rough material of corrosion-resistant, martensitic chromium steels. A remelting block is produced and a tube blank is made therefrom, the tube blank being formed into a tube at hot forming temperature by extrusion at a deformation ratio of at least 6. Hollow bodies are cut from the resultant tube.

Abstract: A method of manufacturing a pipe body having a rectangular cross section, including preparing a metal plate having edges parallel to each other and bending lines parallel to the edges, forming malleable portions extending perpendicular to the bending lines, forming the metal plate into an intermediate product by bending at the bending lines such that the intermediate product includes a center bottom wall, adjoining walls, and two upper walls, applying external forces to the adjoining walls so as to expand and curve the center bottom wall outward, thereby bringing the edges in the upper walls into intimate contact, and applying external force to the curved center bottom wall so as to flatten the center bottom wall and maintain the edges in close contacted condition with a spring back force in the center bottom wall, wherein the malleable portions are formed in the adjoining walls.

Abstract: The invention relates to a method for manufacturing tubes and profiles with variable wall thickness over the length. The method comprises the steps of flexible rolling of continuous material strip with variable thickness in the longitudinal direction of the strip material to a final wall thickness which is continuously reduced with respect to the original wall thickness, reshaping the material strip to form a continuous tube or profile and cutting to length individual tube or profile pieces from the continuous tube or profile.

Abstract: A small diameter metal tube whose inner surface is smooth and its production method are provided. The metal tube has an inner diameter of up to 1.0 mm and its inner surface has a maximum height difference (Rf) in the surface roughness of up to 3 ?m.

Abstract: A small diameter metal tube having at least two inner diameters is provided. A method for producing this metal tube is also provided. In this method, a plate member having a development shape of the metal tube is blanked from a metal thin plate so that the plate member is left partly tied to the metal thin plate, the plate member is press formed into a tubular body having the at least two inner diameters, and the plate member partly tied to the metal thin plate is cut apart to produce the metal tube having at least two inner diameters.

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: Thin walled compartmented tubular structure and its manufacturing process. The elbow or T-shaped structure, includes an external wall (14)and continuous internal walls (22) made in one piece. This therefore materializes, between the inlet (10) and each outlet (12) of the structure, at least one continuous passage to direct a fluid circulating inside it. The structure according to the invention is manufactured by diffusion welding and superplastic forming, from titanium alloy sheets. One application is for aircraft de-icing circuits.

Abstract: A process produces a welded seamless PIPE having good yield strength and excellent corrosion and/or erosion resistance. Up to a maximum outside diameter corrosion and/or erosion resistant CRA PIPE is cold worked from a welded hollow, rather than using the traditional seamless pierced hollow method. A high-speed roll-forming mill is also utilized, rather than using the slow traditional break press to form the welded hollow. Welded hollow dimensions can be achieved which comply with the method of cold working's capability to produce the yield strengths and dimensional tolerances required to meet the service criteria of the PIPE's intended application.

Abstract: In a method of securing a rod-shaped part in a surrounding holding member, a flat holding member is fabricated with opposite side edges that are formed with elements configured for interlocking engagement. The side edges of the holding member are bent upwards, and the holding member is then shaped into a cross section in accordance with the cross section of the rod-shaped part. After inserting the rod-shaped part into the holding member; the holding member is press-fitted about the rod-shaped part.

Abstract: Sub-blanks having different thicknesses and/or different materials are joined together along a joint line or boundary line. The joint line can have an axial directional component and/or a radial directional component. The blank is formed into a U-shaped structure with two substantially parallel arms and the arms can be overbent toward each other by a distance that varies along the axial length of the U-shaped member. The U-shaped member can be subjected to a press forming operation to form a substantially tubular member. The substantially tubular member can have a non-circular cross-sectional shape. A step can be formed at the joint line as a result of different thickness sub-blanks. The step is placed in a press forming die facing outwardly so that the step is reduced during the press forming operation.

Abstract: A method for the manufacture of welded tubes is provided. The tube bodies are produced in a press or rounding apparatus and are fed to a welding machine, such as a laser or electron beam type welding machine. The tube is formed when the edges of the tube bodies are welded together. The method includes the transfer of the tube bodies from the press or rounding apparatus to the draw-in of the welding machine. One or more transfers modules, each having a separate drive, are used to convey the tube bodies. The one or more transfer modules, which are operated by a common control arrangement, are controlled so that the intermittently formed tube bodies are presented at the draw-in to the welding machine in as nearly continuous a sequence as possible.

Abstract: A sheet metal profile support (10) for automotive construction, such as a cross member, rocker panel, or frame support is disclosed, with a U-shaped, parabolic, or horseshoe-shaped profile cross section (12), in which, in at least one section (14) of the two legs (16, 18) of the profile, a first and second sheet metal layer (20, 22) rest flush against each other as a sheet doubling and in the region of the free ends of the legs (16, 18), the sheet metal layers (20, 22) are connected to each other in one piece by means of a beaded edge (32) that has a hollow chamber (34).

Abstract: An electromagnetically operable valve having an electromagnetic circuit which includes at least one solenoid coil, a core used as internal pole, and an armature, as well as a magnet housing at least partially surrounding the solenoid coil. The magnet housing is produced from a sheet-metal blank with the aid of rolling or bending. The magnet housing has a middle housing area that is adjoined in the axial direction on both sides by attachment areas which have a smaller outside diameter than the housing area. The valve is particularly suitable as a fuel injector for fuel-injection systems of mixture-compressing internal combustion engines with externally supplied ignition.