Abstract: A clamp member and a counter pressure member are hingedly connected together about a rotary axis, and a fitting portion of a fitting protrusion that is positioned in a fitting recess is located at a foreside in an advancing direction of the pipe relative to a position where a bending operation of the pipe is initiated, and a mating portion at which a first groove part of the clamp member and a second groove part of a counter pressure member mate is located at a backside in the advancing direction of the pipe relative to the position where the bending operation of the pipe is initiated. The counter pressure member comprises a first member supported rotatably about the rotary axis, a second member detachably connected to the first member, and a third member detachably connected to the second member, which are connected together by a common connecting member (e.g., bolt).

Abstract: A method of spooling a marine pipeline (90) including a plurality of bi-metallic pipe sections (10) (66) onto a reel (60) including at least the steps of: (a) filling a first pipe section with a fluid (12); (b) spooling the first pipe section onto the reel; (c) filling a second pipe section with a fluid (78); (d) joining the first pipe section with the second pipe section wherein at least one of the first and second pipe sections maintains the fluid (12,78) therein; and (e) spooling the second pipe section onto the reel.

Abstract: A supporting core for using in a device for forming plates into a structured hollow profile and a method for producing structured hollow profiles from a plate, which on the one hand ensures an all-over support of the plate, and still enables the production of hollow profiles with a variable cross-section or a curved course, is provided by including individual supporting members, which when pushed together at least in part form as a surface an inner contour of the hollow profile to be produced and are interconnected by means of coupling elements, wherein the coupling elements allow the supporting members to be pulled-apart, and wherein the supporting members are interconnected in a hinged manner in the pulled-apart position.

Abstract: According to an implementation a method for manufacturing a pedal for a motor vehicle is provided. The method comprising inserting into a hollow profile a flexible yet substantially incompressible retainer member and subsequently applying one or more forces to an external surface of the hollow profile to induce a change in shape of the hollow profile from a first shape to a second shape. The substantial incompressibility of the retainer member inhibiting deformations in the internal wall surface of the hollow profile as the one or more forces are applied to the external wall surface of the hollow profile so that the internal wall surface is substantially free of deformations upon the hollow profile assuming the second shape, the flexibility of the retainer member allowing it to bend in the direction of the applied one or more forces to accommodate a change in shape of the hollow profile from the first shape to the second shape.

Abstract: According to an implementation a method for manufacturing a pedal for a motor vehicle is provided. The method comprising inserting into a hollow profile a flexible yet substantially incompressible retainer member and subsequently applying one or more forces to an external surface of the hollow profile to induce a change in shape of the hollow profile from a first shape to a second shape. The substantial incompressibility of the retainer member inhibiting deformations in the internal wall surface of the hollow profile as the one or more forces are applied to the external wall surface of the hollow profile so that the internal wall surface is substantially free of deformations upon the hollow profile assuming the second shape, the flexibility of the retainer member allowing it to bend in the direction of the applied one or more forces to accommodate a change in shape of the hollow profile from the first shape to the second shape.

Abstract: The present invention concerns a bending core to bend filiform materials like pipes. Said core comprises two or more component parts put in series to each other. Said component parts feature a shape suitable for engaging the complete portion of the inner area of the surface of the pipe being bent to prevent the formation of folds in the inner portion of the pipe being bent, thus preventing the material being deformed from folding instead of following a curvilinear pattern.

Abstract: A mandrel that provides a counter-force to the pressure exerted on the outside of a pipe or other arcuate surface by a friction stir welding tool, wherein the mandrel is expandable through the use of a wedge, and wherein the mandrel enables multiple friction stir welding heads to simultaneously perform welding on the arcuate surface.

Abstract: A split link (800C) includes a first half link (801), a second half link (803) and a threaded aperture (805) formed in both the first half link (801) and second half link (803) for use in joining the first half link and second half link with a fastening device(807) to form a split link assembly. The split link assembly is machined to include a head portion (811), shoulder portion (813), barrel portion (815) and base portion (817) for use in providing a highly flexible tube bending mandrel.

Abstract: In an arrangement for bending tubular workpieces, in which a workpiece is supplied to a bending head for bending and is supported from the inside during the bending process in the bending region by means of a mandrel introduced into the workpiece, with the mandrel comprising a mandrel element and a traveler, sitting movably in the workpiece and the traveler being longitudinally displaceable in the workpiece by means of a feed device (14), the traveler is produced from a magnetizable material and the feed device comprises a magnetic device which is applied to a position corresponding to the position of the traveler outside of the workpiece, with a positive magnetic engagement being formed between the magnetic device and the traveler, with the traveler being displaceable in the workpiece via the magnetic device.

Abstract: The various embodiments herein provide a mandrel assembly for tube bending. The mandrel assembly comprises a plurality of chains, a ring arranged between the plurality of chains links, a plurality of ball segments, a shank and a pin. The ring is placed between the set of chain links and the chain links are inserted into the one side of the ball segment and the other side of the ball segment is inserted with other set of chain links and the pin is held to hold the components firmly. The plurality of chains links are passed into a machined section of each of the plurality of ball segments and the pin is inserted into a groove of the ball segments to hold the plurality of chains and then connected to the shank thereby forming a mandrel joint.

Abstract: A pipe-bending machine mandrel includes a rigid member (5), inserted inside a pipe (T) which has an internal dimension Di and can tilt in a bending operation with a mean radius Rm as measured between the rotation center (O) of a bending die and the longitudinal axis (l) of the pipe (T). The rigid member (5) has a proximal side profile with respect to the rotation center (O) and includes a concave intermediate portion as generated by a radius Rci, and a distal side profile with respect to the rotation center (O) that includes two convex, divided, end portions as generated by respective radius Rce, where Rci=Rm?(Di/2)+t, and Rce=Rm+(Di/2)?t, t being a term varying according to the accuracy of the dimensional characteristics of the pipe and of the curve to be obtained.

Abstract: A method for surface treating a mandrel bar used for hot rolling of high-alloy seamless steel pipe is provided. The method includes heat treating the mandrel bar to develop a scale, and after heat treatment, rolling ordinary steel comprising 8% or less of chromium for at least 50 passes.

Abstract: A mandrel assembly is provided for insertion into a hollow tube to support the interior walls of the tube during bending of the tube in a tube bending apparatus. The mandrel assembly includes at least one mandrel segment that is adapted for positioning within the tube and has an exterior support surface for supporting the interior walls of the tube during bending. The mandrel segment is anchored at a fixed axial location within the tube by an anchoring device that is radially expandable and retractable between an expanded condition in which an anchor shoe is engaged with the interior wall of the tube and a retracted condition in which the anchor shoe is loose within the tube. A mandrel support rod is attached to the anchoring device for inserting and withdrawing the anchoring device into the tube when the anchor shoe is retracted.

Abstract: A pipe-bending machine mandrel includes a rigid member (5), inserted inside a pipe (T) which has an internal dimension Di and can tilt in a bending operation with a mean radius Rm as measured between the rotation center (O) of a bending die and the longitudinal axis (l) of the pipe (T). The rigid member (5) has a proximal side profile with respect to the rotation center (O) and includes a concave intermediate portion as generated by a radius Rci, and a distal side profile with respect to the rotation center (O) that includes two convex, divided, end portions as generated by respective radius Rce, where Rci=Rm?(Di/2)+t, and Rce=Rm+(Di/2)?t, t being a term varying according to the accuracy of the dimensional characteristics of the pipe and of the curve to be obtained.

Abstract: A mandrel assembly is provided for insertion into a hollow tube to support the interior walls of the tube during bending of the tube in a tube bending apparatus. The mandrel assembly includes at least one mandrel segment that is adapted for positioning within the tube and has an exterior support surface for supporting the interior walls of the tube during bending. The mandrel segment is anchored at a fixed axial location within the tube by an anchoring device that is radially expandable and retractable between an expanded condition in which an anchor shoe is engaged with the interior wall of the tube and a retracted condition in which the anchor shoe is loose within the tube. A mandrel support rod is attached to the anchoring device for inserting and withdrawing the anchoring device into the tube when the anchor shoe is retracted.

Abstract: A method of forming an aircraft nacelle nose lip segment. The method includes bending a sheet of metal into a substantially U-shaped workpiece having a spanwise axis, opposed first and second ends, and opposed first and second edges. The method further includes placing the workpiece over a substantially flexible first mandrel, stretching the workpiece in a spanwise direction between the first and second ends, and wrapping the workpiece and first mandrel together about a curved die while stretching the workpiece. The workpiece is thereby plastically deformed to have a first shape. The method may further include removing the workpiece from the first mandrel, and placing the workpiece over a substantially rigid second mandrel that substantially corresponds in shape to the first shape of the workpiece. The workpiece is stretched over the second mandrel in a chordwise direction that is substantially transverse to the spanwise axis of the workpiece, thereby further plastically deforming the workpiece.

Abstract: A mandrel for bending which inhibits generation of irregularities on the inside of the bend is provided. The mandrel comprises a plurality of plugs in the form of discs and a through-hole is created substantially in the center of each plug. A flexible member is inserted through the through-holes of the respective plugs. One end of the flexible member is fixed to a shank so that the plugs are connected to the shank in series. Each plug is provided with a flat slant surface that descends from about the center of the plug toward the outer periphery of the plug. A lock hole is formed in parallel to the through hole in each plug and a flexible lock member, one end of which is fixed to the shank, is passed through the lock holes of the respective plugs.

Abstract: A bending apparatus which can bend pipes and obtain as small curvature as possible without flattening or buckling easily occurring in the bending region. The bending apparatus comprises a bending die for a pipe, a clamping die which rotates together with the bending die while clamping the pipe, a pressure die which hold down the pipe, and a metal core which is inserted into the pipe and maintains the shape of the bending region, wherein the metal core is a spherical metal core rotatably supported by an arch shaped arm on the leading end of a core holder.

Abstract: By employing a Cr-plated mandrel bar for producing hot seamless tubes according to the present invention wherein centerline average roughness Ra in axial and circumferential directions as well as maximum depth Rv in axial and circumferential directions is specified and further maximum height Rp in axial and circumferential is specified, surface defects such as seizure unlikely generate in an elongation-rolling process by a mandrel mill so that the service life can be dramatically extended, thereby the remarkable reduction of tool cost can be achieved. Moreover, it contributes greatly to improve the inner surface quality of hot seamless tubes to be rolled by a mandrel mill rolling process. Also, the manufacturing method by the present invention makes it possible to efficiently manufacture Cr-plated mandrel bar for producing hot seamless tubes.

Abstract: A method of making a pre-formed tubular member includes the steps of providing a tubular member extending longitudinally and providing a bending assembly having a mandrel with at least one ball and a bending die. The method also includes the steps of positioning the at least one ball inside of the tubular member. The method further includes the steps of bending the tubular member about the bend die to form a bent pre-formed tubular member having at least one curved portion having a recess therein.

Abstract: A method where 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. An annular outside mandrel having at least three slits formed in the distal end thereof along generating lines is used as the outside mandrel, and the clamping die is caused to revolve around the bending die with the outside mandrel and inside mandrel protruding toward the distal end of the mutli-layered pipe from a bending start point.

Abstract: A core bar for bending of a pipe and a method of bending of a pipe are provided whereby collapse of the pipe can be prevented and bending can be automated at low cost. Ends of the respective core bar portions are formed such that, when the ends of the two cylindrical core bar portions are engaged telescopically, and one core bar portion is bent at a desired angle with respect to the other core bar portion, the outside circumferential surface of the bending region that is formed by these core bar portions becomes a curved surface along the generating line.

Abstract: A bending device is described for thin-walled metal tubes (R) made of a straight tube guide (1), a core template (2), which adjoins the tube guide (1) and is pivotable in relation thereto, having a connection strip (3), and a mandrel, having a mandrel tip (4), which is flexible in the region of the core template (2), and a mandrel shaft (5), which adjoins the mandrel tip (4) and is rigidly connected thereto and is axially fixed (1) in the tube guide. In order to support the metal tube (R) to be bent over its entire surface on the inside in the active bending region during the bending procedure, the flexible mandrel tip (4), which comprises a radially incompressible solid cylinder made of elastomer, extends only over the starting section of the bending curve, where the bending procedure occurs.

Abstract: A core bar for bending of a pipe and a method of bending of a pipe are provided whereby collapse of the pipe can be prevented and bending can be automated at low cost. Ends of the respective core bar portions are formed such that, when the ends of the two cylindrical core bar portions are engaged telescopically, and one core bar portion is bent at a desired angle with respect to the other core bar portion, the outside circumferential surface of the bending region that is formed by these core bar portions becomes a curved surface along the generating line.

Abstract: A mandrel for bending of simple construction and sufficient rigidity is obtained. The mandrel comprises a plurality of plugs. Each plug is provided with a spherical outer peripheral surface A fulcrum pin is fitted through the plug. The first and second link members are rotatably attached to the fulcrum pins of the neighboring plugs so as to connect the neighboring plugs. The plug is also provided with a spherical depression which the adjoining plug can enter during the bending. The plugs are connected to the shank via the second link members.

Abstract: The invention relates to a bending mandrel for a bending device and also to a bending method for pipes, more particularly pipes which have a large diameter-to-wall thickness ratio and are to be bent by a small radius, for example, of the order of magnitude of the pipe diameter. To this end use is made of a bending mandrel (5, 6) to whose rigid head (5) assembly (6) of springy sheet metal lamellae (6a, 6b) is attached to improve the bendability of the bending mandrel (5, 6) while maintaining a satisfactory supporting action, the lamellae (6a), with the exception of the outer lamellae (6b), having window-like cutaway portions (6c).

Abstract: By means of this process it is intended to achieve a high mechanical-geometric accuracy of bent tubes, and it is used for bending a measuring tube for a Coriolis mass flow rate sensor by means of a tube section of a predetermined length and by means of a two-piece press mold, which has been matched to both the measuring tube, which has an inner diameter and an outer diameter, and to the desired shape. To this end, a flexible support body is inserted into the tube section, which is fastened in a first end of the tube section in such a way, that the end is closed, and whose maximum outer diameter is less than the inner diameter of the tube section. The tube section is filled with a liquid which is subsequently permitted to solidify completely. The tube section filled with the support body and the solidified liquid is placed into the opened press mold, the latter is closed and the tube section is bent into the desired shape by this. The press mold is opened and the bent tube section is removed.

Abstract: A mandrel for insertion into a pipe prevents distortion and buckling while bending the pipe. The mandrel comprises three or more radial support members distributed along a longitudinal extent of the mandrel. A first radial support member is located at a first end of the mandrel. A second radial support member is located at a second end of the mandrel. At least one intermediate radial support member is located between the first and second radial support members. A channel is formed in the at least one intermediate radial support member. A leaf spring extends along the longitudinal extent of the mandrel, and the leaf spring is located within the radial support member channel. The leaf spring has a first and second spring end. A first end bolt attaches the first spring end to the first radial support member. A second end bolt attaches the second spring end to the second radial support member. A compliant member attaches to the leaf spring by a compliant member bolt.

Abstract: An apparatus for heating and setting a stent having curved limb elements. The apparatus is a mandrel having a restraining mechanism such as pins placed on the outer surface of the mandrel or shallow grooves machined in the outer surface of the mandrel to hold and mold the stent. The mandrel helps alleviate stresses induced upon stent elements during the heating and setting process and produces a more exact stent according to the desired stent design.

Abstract: A first mandrel segment comprised of first and second resinous sheets including proximal end portions vertically spaced from each other is initially inserted into a pipe having a weld seam extending longitudinally thereof. Since the first mandrel segment has a thickness smaller than an inside measurement of the pipe, the first mandrel segment can be inserted into the pipe without being caught by a bulged portion of the weld seam protruding inwardly of the pipe. After the insertion of the first mandrel segment, a second mandrel segment comprised of a third resinous sheet is forced into a spacing between the first and second resinous sheets. By thus forcing the third resinous sheet into the spacing, the first resinous sheet is pushed vertically to come into intimate contact with the bulged portion. The pipe having the first, second, and third resinous sheets thus inserted therewithin is then bent by a bender. After the bending of the pipe, the third resinous sheet is first pulled out of the bent pipe.

Abstract: A bending device for bending tubes, especially composite tubes. The bending device comprises at least two bending mandrels that each include a main part movable at most in the axial direction of the tubes. Each bending mandrel also includes a string of elements that are connected to the main part for pivoting in at least two mutually perpendicular planes.