Abstract: A method of producing a structure support may include: providing a hollow workpiece composed of a steel material; heating the hollow workpiece to an austenitizing temperature range to provide the steel material with an austenitic microstructure; forming the hollow workpiece into a predefined complex geometry while the hollow workpiece is still in the austenitizing temperature range; and cooling the hollow workpiece with the predefined complex geometry to transform the austenitic microstructure into a martensitic microstructure.

Abstract: A method for manufacturing includes a polygonal shape closed structure part with a bent shape in the longitudinal direction only by press forming. The method uses two metal plates for manufacturing a curvilineal closed structure part and includes a press forming process of forming straight or bent folding lines in the longitudinal direction of the two metal plates at positions corresponding to a polygonal bent shape with a flange formed at least at one of the ends of the width direction of each plate, a process of forming a closed structure by laying the two metal plates to overlap each other flange to flange and end to end for ends without flanges and by welding the portions laid to overlap each other in the longitudinal direction of the metal plates, and a process of forming a polygonal shape closed structure having a bent shape in the longitudinal direction by holding both ends of the closed structure and by compressing it toward its central axis.

Abstract: A square pipe manufacturing method includes: a first processing step of forming a first intermediate formed product 13 by bending both widthwise end portions of a rectangular metal plate 1; a second processing step of forming a second intermediate formed product 21 by bending both widthwise sides of a bottom surface 11 of the first intermediate formed product 13; a third processing step of obtaining a third intermediate formed product 23 by curving the side wall surfaces 17 to be convex outward in the width direction by pressing the flange parts 7, 7 toward the bottom wall surface 19 and then pressing the curved side wall surfaces 17 inward in the width direction; and a fourth processing step of crush-deforming corners 31, 31, 33, 33 of the third intermediate formed product 23.

Abstract: Apparatus (120) for making an adaptor (2) which is used in heating and ventilation systems and which is used to connect ducting which is of a square cross sectional shape to ducting which is of a circular cross sectional shape, which apparatus (120) comprises: (i) a work area (24) for receiving sheet metal (127) to be made into the adaptor (2); (ii) a creasing member (28) which is for creasing the sheet metal (127) on the work area (24); (iii) a pivot member (122) about which the sheet metal (127) is pivoted on the work area such that the creasing member (28) is able to make a plurality of creases (146) which are in the sheet metal (127) and which extend from the pivot member (122) in order to produce a transition part of the adaptor (2) which is positioned between a first end of the adaptor (2) which is of the square cross sectional shape and a second end of the adaptor (2) which is of the circular cross sectional shape; (iv) operator means (32) for causing the creasing member (28) to operate and crease t

Abstract: A flat wiring member includes a plurality of rectangular enamel coated wires arranged in the form of a flat plate, a wiring stem portion that the rectangular enamel coated wires are arranged in parallel to each other and adjacent ones of the rectangular enamel coated wires are bonded to each other at a surface of an enamel coat layer thereof, and a wiring branch portion with the rectangular enamel coated wires bent so as to branch off from the wiring stem portion.

Abstract: An apparatus and method for swaging a square or rectangular tube, the apparatus including a support for external dies, both surface dies and corner dies, which when actuated, apply pressure to the outside of a tube to achieve its swaging to a lesser dimension, and having a collapsible mandrel located therein, supporting internal dies, that apply a lesser pressure against the interior of the tube, during a swaging operation, to assure that wall buckling does not occur. An internal die with its removing tool may locate within the end of the tube to be swaged to cooperate with the pressure from the external dies to swage the tube without any final buckling.

Abstract: A method for forming the extruded hollow section using a forming apparatus including a fixed die provided with a forming hole having guide grooves extending in a direction tilting against the direction of extrusion, and movable dies able to travel along the guide grooves, respectively, wherein the fixed die has a base part provided so as to bridge between inner faces of the forming hole, and a hole forming part extended from an end of the base part, on a downstream side thereof, toward downstream inside the forming hole. The method includes the steps of extruding the parallel parts with the movable dies as-stopped state, and extruding the tilt parts while causing the movable dies to travel along the guide grooves, respectively.

Abstract: A heat conducting structure, a heat sink with the heat conducting structure, and a manufacturing method of the heat conducting structure are disclosed. The manufacturing method includes the steps of providing a first mold (20) and a second mold (30) having different concave cambers (211, 211a, 221, 221a), using the first mold (20) to progressively compress the heat pipes (10) and form a camber (112) at an evaporating section (11), using the second mold (30) to compress the camber (112) to form a contact plane (112?) and an attaching plane (113?) perpendicular to each other, coating an adhesive (50) on the contact planes (112?), connecting the contact planes to make the attaching planes co-planar.

Abstract: In a method of connecting chassis parts to produce a chassis assembly, at least one end of a first chassis part is connected with a second chassis part in an overlap zone by a form fit and an interference fit through an internal high pressure joining process. The second chassis part serves hereby a seal of the one end of the first chassis element.

Abstract: A method for forming the extruded hollow section using a forming apparatus including a fixed die provided with a forming hole having guide grooves extending in a direction tilting against the direction of extrusion, and movable dies able to travel along the guide grooves, respectively, wherein the fixed die has a base part provided so as to bridge between inner faces of the forming hole, and a hole forming part extended from an end of the base part, on a downstream side thereof, toward downstream inside the forming hole. The method includes the steps of extruding the parallel parts with the movable dies as-stopped state, and extruding the tilt parts while causing the movable dies to travel along the guide grooves, respectively.

Abstract: Roll forming a round tube to a square tube without applying excessive load to the raw tube scheduled portions to become corner portions and shoulder portions. This invention structures the curvature of the rotation axis direction of the forming roll surface in a way that in relation to other raw tube locations (straightening precedes for the raw tube locations adjacent to the corner portion scheduled locations of the square tube. It disposes stands of four-direction roll structure at the forming roll stand furthest upstream and furthest downstream sides and disposes stands of upper-lower and left-right two-direction roll structure between the upstream and downstream roll stands, and by adopting forming roll with a structure having a curvature for constricting the raw tube locations to become the shoulder portions adjacent to the corner portions of the square tube at a smaller curvature than that constricting the raw tube portions to become the side portion centers of the square tube cross section.

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: A duct structure (50), includes lengths of square/rectangular duct (52) manufactured by pre-forming the duct in round cross-section (51) and then transforming the round cross-section into square and rectangular cross-sections utilizing expandable die structures (58). The duct (52) may be connected together end to end by flanged connectors (54) formed from strip stock (71), that is notched at locations that correspond to the corners of the formed flange connector. The cross-sectional profile of the flanged connector is then formed by roll forming and/or bending and/or other techniques. Thereafter, the strip stock is bent at its notched locations to define the corners (80) of the flange connector (54) and then the free ends of the strip stock are fixed together.

Abstract: The invention relates to a method of producing a plain bearing bush or bearing shell of varying width from a flat strip material, which comprises the following steps: incorporating grooves in the flat strip material along the bush or bearing-shell contour, rolling or bending the flat strip material into a bush or bearing-shell shape, mechanical severing of the excess marginal regions along the grooves, obtaining a finished plain bearing bush or bearing shell which has the final shape. In this case, the invention is based on the idea of producing trapezoidal or stepped bushes as “shaped bushes” from strip material. The starting point in this case may be a strip of rectangular cross section, which is normally used for cylindrical bushes. The grooves can be incorporated in the flat strip material.

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: According to the hydroforming method by the invention, when slots with the aspect ratio of 3 or more are pierced onto the bulge-formed portion made by the hydroforming, even the piercing can be carried out within a series of processing steps in the hydroforming, thereby eliminating the piercing operation by means of the cumbersome machining process such as milling and ensuring an excellent slot configuration. Thus, the hydroformed parts by the invention are best suited for the automobile parts etc. where various piercing operations are required, and the mold used for the hydroforming method by the invention can be widely employed for processing the automobile parts etc., whereby the invention can be applied for processing the parts in automobiles and industrial machineries as well.

Abstract: A flexible axle for motor vehicle has a cross-member (1) connecting two longitudinal arms (2), wherein said cross-member (1) has a closed cross-section, and said cross-member has, at least in a central zone, a substantially trapezoid cross-section (11).

Abstract: An apparatus for forming a beam member for a torsion beam in a rear wheel suspension system of an automobile wherein said apparatus includes top and bottom dies for forming a U-shaped or V-shaped section and an extension section of the beam member, upper and lower pad-dies coupled to top and bottom dies for forming a rectangular section of the beam member before operation of the top and bottom dies, and left and fight cams installed at both sides of a pipe so as to be horizontally inserted into the pipe by a hydraulic cylinder for maintaining inner shapes of the extension section and the rectangular section, said cams preventing both distortion and wrinkling from occurring on the rectangular section and the extension section of the beam upon operation of the top and bottom dies, thereby allowing the beam member to be formed to have different cross sections at different portions of the beam with complete symmetry, by a single process.

Abstract: A center support punch assembly for a hydroforming die includes a center support member for fixed attachment to a die. The center support punch assembly also includes a button disposed about and space from the center support member for fixed attachment to the die. The center support punch assembly further includes a plunger movable relative to the center support member to allow fluid within a tubular member to force a wall portion of the tubular member outward against the center support member and be sheared by the button to produce an opening in the tubular member.

Abstract: A duct structure (50), includes lengths of square/rectangular duct (52) manufactured by pre-forming the duct in round cross-section (51) and then transforming the round cross-section into square and rectangular cross-sections utilizing expandable die structures (58). The duct (52) may be connected together end to end by flanged connectors (54) formed from strip stock (71), that is notched at locations that correspond to the corners of the formed flange connector. The cross-sectional profile of the flanged connector is then formed by roll forming and/or bending and/or other techniques. Thereafter, the strip stock is bent at its notched locations to define the corners (80) of the flange connector (54) and then the free ends of the strip stock are fixed together.

Abstract: The invention provides tube bank structure and a method of manufacturing a flow tube, which can improve the stabilization of the flow of stock in the tube bank of the headbox of a papermaking machine and prevent the development of turbulence and uneven concentration of stock flow by a simple and inexpensive means, resulting in speedup of papermaking process. Said flow tubes has a smaller diameter pipe portion of a circular cross-section in the inlet side, a larger diameter pipe portion connected to said smaller diameter pipe portion, a tapered pipe portion, and a rectangular pipe portion, the cross-sectional configuration of said tapered pipe portion being changed smoothly from circular to rectangular configuration.

Abstract: A tube reduction apparatus uses a pair of plates, each of the plates providing an X-shaped aperture therein. The X-shaped aperture comprises two pairs of opposing slots, and each slot provides a pair of opposing grooves. The grooves are oriented at right angles to the slots. The pair of plates are in face to face contact with the X-shaped apertures, grooves and slots aligned. A set of four wheels are mounted on transverse axles which are captured in the grooves with the wheels positioned in the slots. A V-shaped concave annular face has an has a semi-circular annular notch at its apex. The four wheels are positioned such that their edges are in mutual adjacency forming a square passage therebetween them.

Abstract: A duct structure (510), includes lengths of double wall square/rectangular duct (532) manufactured by pre-forming the duct in round cross-section (51) and then transforming the round cross-section into square and rectangular cross-sections utilizing expandable die structures (58). The duct (532) may be connected together end to end by flanged connectors (510, 520) formed from strip stock (71), that is notched at locations that correspond to the corners of the formed flange connector. The cross-sectional profile of the flanged connector is then formed by roll forming and/or bending and/or other techniques. Thereafter, the strip stock is bent at its notched locations to define the corners (80) of the flange connector outer and inner portions (511 and 512) and then the free ends of the strip stock are fixed together. Thereafter, the outer and inner flanged connector portions (511 and 512) are fastened together.

Abstract: A process for manufacturing a can with a polygonal cross-section and a can with a polygonal cross-section, the process comprising the steps of milling the cylindrical lateral wall of a tubular body (10), providing said wall with a plurality of circumferential ribs (20) which are continuous and axially spaced from each other and defined by a certain degree of radial plastic deformation of the respective circumferential region of the cylindrical lateral wall of the tubular body (10); expanding the formed tubular body (10), deforming it, in order to define longitudinal edges (12) in whose region the circumferential ribs (20) are eliminated; and double-seaming a bottom and an upper wall of the can to the tubular body (10). This process defines a can having any polygonal cross-section and circumferential ribs (20) on the lateral wall thereof, between the longitudinal edges (12).

Abstract: A process of producing from an elongate tube a tubular structural component having a first longitudinal section integrally connected to a second longitudinal section, the second section being located at the end of the tube and being of a desired cross-sectional shape and size, the cross-sectional size of the second section being greater than that of the first section, the process including selecting a mandrel having a cross-sectional shape and size corresponding to the second section, relatively axially feeding said end of the tube over the mandrel in order to form said second section, the choice of the size of mandrel and the rate of feed and the axial pressure applied to said tube being controlled such that the wall thickness of the second section is on average at least 70 percent of the average wall thickness of the first wall section.

Abstract: A method includes rollforming and sweeping a tubular beam with a constant longitudinal cross section, and then reforming the tubular beam 10 to form a tubular beam having a non-constant cross section. The non-constant cross sections have specific shapes chosen to provide particular structural properties and surfaces along the reshaped beam, and also to provide a stylized appearance, such that the reformed beam is useful as a vehicle bumper. In particular, the reshaped beam includes integrally formed vehicle mounting structure, angled end sections forming aerodynamic but impact-resistant bumper ends, and a high-energy absorbing but flexible center section.

Abstract: There is provided a plastic working machine for plastically working a tube by employing tube holding and spinning means for holding and spinning the plastically workable tube around the axis of the tube and first and second plastic working tools which face to each other so as to pinch the tube in the radial direction of the tube and which are movable along the radial and axial directions of the tube while being pressed against the tube. The plastic working machine executes a step of plastically working the tube by the first and second plastic working tools by continuously spinning the tube around the axis thereof and by applying compressive load or tensile load along the axial direction of the tube to the tube.

Abstract: This invention is a process for making micro-multiport tubing for use in automobile air conditioner heat exchangers. The tubing is a flat body with a row of side-by-side passageways, which are separated by upright webs. Processing of this tubing involves extrusion, a straightening and cutting operation, assembly and furnace brazing of the condenser. This invention improves the grain size of the metal in the tubing and also improves the metallurgical strength of the tubing. Ports are formed in the tubing during extrusion. These ports are separated by webs and the webs are extruded so that they have a reduced thickness at their centers. In response to successive cold working of the body, the webs are changed in shape to a more uniform thickness state. Stated other wise, in this invention, the webs are initially of hour glass shape such that when there is five percent change in material thickness, the strain is concentrated at the center of the web and results in at least fifteen percent cold work.