A process for winding a convolutely wound tubular structure having a machine direction, a cross-machine direction coplanar thereto, and a Z-direction orthogonal to both the machine- and cross-machine directions is disclosed.

The present invention is directed to providing a tube assembly for a heat exchanger or heat management apparatus in which the tube assembly can be integrally assembled using inner fin tubes having a two-row structure and drainage performance and corrosion resistance performance can be improved. The tube assembly for the heat exchanger or heat management apparatus includes a first- and second- row tube including an inner fin type tube respectively, a central connection portion that connects the first-row tube to the second-row tube, and a header in which a first- and a second-row tube hole, into which ends of the first- and the second-row tube are inserted, are arranged, wherein a cut portion formed in the direction opposite to the ends of the first- and the second-row tube inserted into the header is included in the central connection portion.

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), and a bellows (108). The bellows (108) comprises a corrugated inboard ply (110), a corrugated outboard ply (112), and an interstitial space (126). The conduit (100) also comprises a first weld (138), hermetically coupling the corrugated inboard ply (110), the corrugated outboard ply (112), and the first collar (102) and comprises a second weld (183), hermetically coupling the corrugated inboard ply (110), the corrugated outboard ply (112), and the second collar (103). The conduit (100) additionally comprises a weld-through ring (150), located between the corrugated inboard ply (110) and the corrugated outboard ply (112) and coupled to the first collar (102) by the first weld (138). The conduit (100) also comprises a sensor (116) that is communicatively coupled with the interstitial space (126) via the channel (118) of the first collar (102).

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), a bellows (108), and a sensor (116). The bellows (108) comprises a central axis (180), a first corrugated outboard ply (114), a corrugated inboard ply (110), interposed between the first corrugated outboard ply (114) and the central axis (180), an interstitial space (126), interposed between the corrugated inboard ply (110) and the first corrugated outboard ply (114), and a second corrugated outboard ply (112) within the interstitial space (126). The corrugated inboard ply (110), the first corrugated outboard ply (114), and a weld-through ring (150) are welded to the first collar (102) and the second collar (102). The second corrugated outboard ply (112) is not hermetically coupled to the first collar (102) or the second collar (103). The sensor (116) is communicatively coupled with the interstitial space (126).

A tube for a heat exchanger core bears a micro texture imprinted on an outer surface of the tube. The micro texture having depth of 0.01 mm to 0.03 mm and is thus hardly visible by a naked eye. When the tube is made of cladded metal strip material, the micro texture may have a depth that may be slightly greater than the thickness of the cladding. For folded tubes, an entire strip surface may be covered with the micro texture so that micro texture is present on the outer surface of tube and inside tube. Alternatively, the micro texture may be imprinted after forming the tube so that the micro texture is only present on the outer surface of the tube.

A tube for use in a heat exchanger comprises a base portion, an upper portion spaced from and opposing the base portion, and a partitioning wall extending between the base portion and the upper portion to divide a hollow interior of the tube into a first flow channel and a second flow channel. The partitioning wall includes a plurality of windows spaced from each other in a longitudinal direction of the tube to provide fluid communication between the first flow channel and the second flow channel. At least one of the windows includes a tabbed portion of the partitioning wall bent to extend into one of the first flow channel or the second flow channel.

An extruded rail assembly including a first multi-channel extrusion having at least two tubular channels connected by a center rib, and having a joining end configured for joining at a predetermined angle to a joining end of a second multi-channel extrusion. The second multi-channel extrusion includes at least two tubular channels connected by a center rib, and having a joining end configured for joining at the predetermined angle to the joining end of first multi-channel extrusion. The joining ends of the first and second multi-channel extrusions are configured such that the center ribs complementarily engage as a joining surface.

A vehicle structural member includes an elongate hollow member having an integrated structure, and supporting members joined to the elongate hollow member. The elongate hollow member includes: a first portion that includes a first pipe, a second pipe disposed outside the first pipe and extending along the first pipe, and a connection portion extending along the first pipe and the second pipe, formed integrally with the first pipe and the second pipe, and connecting the first pipe and the second pipe; and a second portion that includes the first pipe continuing from the first portion, and does not include the second pipe.

The present invention is directed to providing a tube assembly for a heat exchanger or heat management apparatus in which the tube assembly can be integrally assembled using inner fin tubes having a two-row structure and drainage performance and corrosion resistance performance can be improved. The tube assembly for the heat exchanger or heat management apparatus includes a first- and second-row tube including an inner fin type tube respectively, a central connection portion that connects the first-row tube to the second-row tube, and a header in which a first- and a second-row tube hole, into which ends of the first- and the second-row tube are inserted, are arranged, wherein a cut portion formed in the direction opposite to the ends of the first- and the second-row tube inserted into the header is included in the central connection portion.

A front rail configured to be supported by a vehicle frame includes a tubular body formed by a roll-formed high-strength metal and configured to undergo axial loading during a front vehicle impact. The high-strength metal sheet defines a cross-sectional shape along a length of the tubular body. The tubular body includes a central wall extending from a first side wall to a second side wall defining at least a first longitudinal channel and a second longitudinal channel. A groove is disposed in first side wall of the tubular body and extends longitudinally along at least a portion of the length of the tubular body to stiffen the tubular body. A hole extends through the first side wall of the tubular body proximate the groove and is configured as a bend initiator.