Abstract: In a friction agitation joining method for joining two plate-shaped joining members butted against each other with a level difference formed at upper surface sides thereof by a joining tool having a probe rotatable about a rotation axis thereof, the butted joining members are arranged so as to be inclined to a horizontal plane with one of the joining members having a higher upper surface level positioned at a lower side and the other at a higher side. Then, the rotating probe is inserted into a butted portion of the joining members or the vicinity thereof in a state that the rotation axis is parallel to a vertical plane extending along the butted portion. Then, the probe is moved relative to the joining members along the butted portion with the probe inserted into the butted portion or the vicinity thereof.

Abstract: According to the present invention, there is provided an automotive sunshade panel formed from a metallic hollow panel and having flanged edges and a two-dimensional curved surface or a three-dimensional curved surface formed at least partially of its central portion excepting the peripheries of the metallic hollow panel. For use in the present invention, a fabric may be laminated to at least one side of the metallic hollow panel. The metallic hollow panel is formed into a one-side expanded Roll-Bond® panel, a both-side expanded Roll-Bond® panel, a both-side flat three-layer Roll-Bond® panel or a honeycomb panel.

Abstract: An Al—Mg—Si series alloy ingot consisting essentially of Si:0.2-0.8 wt %, Mg:0.3-0.9 wt %, Fe:0.35 wt % or less, Cu:0.20 wt % or less and the balance of aluminum and inevitable impurities is prepared. The alloy ingot is homogenized, then subjected to rough hot rolling and finish hot rolling, and finally to cold rolling. One of the rough hot rolling is controlled such that material temperature immediately before one of the rough hot rolling is from 350 to 440° C., cooling rate between one of the rough hot rolling and rough hot rolling subsequent thereto is 50° C./min or more, material temperature immediately after one of the rough hot rolling is from 250 to 340° C. and plate thickness immediately after one of the rough hot rolling is 10 mm or less. The cold rolling is controlled such that rolling reduction is 30% or more.

Abstract: A flat heat exchange tube comprises an upper wall, a lower wall, right and left side walls interconnecting right and left side edges of the upper and lower walls, and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another. The tube has parallel fluid passages formed inside thereof and extending forward or rearward. Each of the reinforcing walls has a plurality of communication holes arranged at a spacing longitudinally thereof for holding the parallel fluid passages in communication with one another therethrough. The upper surface of the lower wall is provided at a portion thereof forming each of the fluid passages with a plurality of turbulence producing portions extending over the entire width of the fluid passage and arranged at a spacing longitudinally of the passage.

Abstract: A heat sink for CPUs for use in personal computers comprises a radiating base plate of metal having on one surface thereof a flat portion for receiving the heat generated by the CPU, and a plurality of radiating fins formed in a raised shape on the other surface of the radiating base plate integrally therewith by cutting. The heat sink is 3 to 8 mm in the thickness of the radiating base plate, 20 to 50 mm in the height of the radiating fins from the base ends of the fins to the outer ends thereof, 0.2 to 0.7 mm in the thickness of the radiating fins, 1.5 to 4 mm in the fin pitch of the radiating fins, and 6 to 62 in the ratio of the height of the radiating fins from the base ends to the outer ends to the spacing between the radiating fins adjacent to one another. When equipped with a cooling fan, the heat sink is 3 to 8 mm in the thickness of the radiating base plate, 15 to 35 mm in the height of the radiating fins from the base ends of the fins to the outer ends thereof, 0.2 to 0.

Abstract: A heat sink comprises at least one row of many tonguelike fins formed on one surface of a heat dissipating base plate and each having a circular-arc outer end. The midportion only of the entire circular-arc outer end portion is bent forward into a curl portion. The fin end portion has opposite side parts other than the midportion and remaining unbent as arcuate portions.

Abstract: In a friction agitation joining method for joining two plate-shaped joining members butted against each other with a level difference formed at upper surface sides thereof by a joining tool having a probe rotatable about a rotation axis thereof, the butted joining members are arranged so as to be inclined to a horizontal plane with one of the joining members having a higher upper surface level positioned at a lower side and the other at a higher side. Then, the rotating probe is inserted into a butted portion of the joining members or the vicinity thereof in a state that the rotation axis is parallel to a vertical plane extending along the butted portion. Then, the probe is moved relative to the joining members along the butted portion with the probe inserted into the butted portion or the vicinity thereof.

Abstract: An aluminum-copper clad member includes an aluminum-base member, a copper-base member and an insertion member made of pure aluminum or JIS A1xxx series aluminum alloy. The aluminum-base member and the copper-base member are clad via the insertion member. A heat sink includes a heat radiation portion made of aluminum-base material and provided with a plurality of tongue-like fins formed by skiving a surface layer of one side of the heat radiation portion and a thermal diffusion portion made of copper-base material and joined to the other side of the heat radiation portion via an insertion member made of pure aluminum or JIS A1xxx series aluminum alloy.

Abstract: A heat sink device for use in desktop electronic devices comprises a heat sink which can be firmly attached to a CPU assembly with extremely great strength. The holes to be formed in the CPU circuit board of the CPU assembly or the heat sink can be made as small as possible to ensure a great advantage in design. Fastening members, connecting pins or like fasteners used are unlikely to project beyond the outer surface of the CPU assembly to ensure compactness. Furthermore, the heat sink device achieves a high radiation efficiency and is less costly to manufacture.

Abstract: A layered heat exchanger for use in evaporators or the like has a pipe mount plate which is given improved amenability to brazing at the portion thereof between a fluid introduction pipe socket and a fluid discharge pipe socket provided on the plate. This feature reliably precludes the development of a shortcut channel between the fluid introduction channel and the fluid discharge channel due to a faulty brazed joint.

Abstract: A provision of a magnetic disk substrate using, as a plated substrate, glass with high hardness in place of aluminum. The magnetic disk substrate is small-sized, can stand against an impact when it is carried, and avoids leaving struck damages (head snap) even if it is used for recent note- or mobile-type computers having a head which is located as closely as possible to the substrate. The magnetic disk substrate comprises forming a nickel/phosphorus coating with a film thickness of 8 &mgr;m-20 &mgr;m or less on crystallized glass with a roughness Ra of 0.05 to 0.5 &mgr;m, the roughness being measured by a tracer and contact type roughness meter after the glass is ground (lapped) and polishing the nickel/phosphorus coating to a depth of 3 &mgr;m or more in a polishing process with the thickness of the plating film left unremoved being 5 &mgr;m or more.

Abstract: A flat heat exchange tube comprises an upper wall, a lower wall, right and left side walls interconnecting right and left side edges of the upper and lower walls, and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another. The tube has parallel fluid passages formed inside thereof and extending forward or rearward. Each of the reinforcing walls has a plurality of communication holes arranged at a spacing longitudinally thereof for holding the parallel fluid passages in communication with one another therethrough. The upper surface of the lower wall is provided at a portion thereof forming each of the fluid passages with a plurality of turbulence producing portions extending over the entire width of the fluid passage and arranged at a spacing longitudinally of the passage.

Abstract: A connected structure includes a supporting member and a bushing mounting member connected thereto. The supporting member is made of a pipe having a round cross-sectional shape. The bushing mounting member includes a bushing mounting portion for mounting a bushing having a rubber elastic member and a connecting portion protruded from the bushing mounting portion. The connecting portion is press-fitted into an opening at one end of the supporting member, and the connecting portion and the supporting member are joined together along a circumference of the supporting member by a friction agitation joining method. Accordingly, the connecting member which is light in weight and high in strength with an improved efficiency for utilizing the surrounding space and a predetermined characteristics of a bushing can be obtained.

Abstract: Provided is a personal computer keyboard in which base and reinforcement plates excellent in heat dissipativity and homogeneous in heat dissipation, and with a mechanical strength are incorporated. The keyboard includes a base plate 24 on which key caps K1 to K9 are mounted; and a reinforcement plate 25 disposed on the lower side of the base plate 24, wherein the base plate 24 is constituted of an Al—Mg—Si based alloy plate including 0.2 to 0.8 wt % of Si, 0.3 to 0.9 wt % of Mg, 0.35 wt % or less of Fe and 0.20 wt % or less of Cu with the rest of Al and inevitable impurities and wherein the reinforcement plate 25 is constituted of a heat pipe panel.

Abstract: A heat pipe is produced by forming on a container an outwardly projecting tube portion having an interior in communication with the interior of the container for providing a gas retaining portion, injecting a working liquid into the container through an outer end opening of the tube portion, subsequently closing the end opening of the tube portion to thereby form the gas retaining portion on the container, heating the container to evaporate the working liquid to cause the gas retaining portion to retain therein noncondensable gases within the container, thereafter closing a container opening in communication with the gas retaining portion and separating the gas retaining portion from the container for removal. The weight of the container having the gas retaining portion and the combined weight of the heat pipe obtained and the separated gas retaining portion are measured and compared.

Abstract: A friction agitation jointing method of workpieces for subjecting the workpieces made of metals having deformation resistance or melting points different from each other to friction agitation jointing in which two of the workpieces are subjected to the friction agitation jointing while forming a peak of friction agitation force or temperature on a side of the workpiece having a larger or a higher one of the deformation resistance or the melting points relative to a bond interface between the two workpieces.

Abstract: A connecting device for a heat exchanger which has a fluid circulating channel formed with an opening at one end thereof and an opening at the other end thereof, the openings being formed as juxtaposed in one side of the heat exchanger. The connecting device comprises a blocklike connector body having two horizontal through bores corresponding to the respective openings and fixed to the heat exchanger with the through bores in coincidence with the respective openings. A tubular member is fluid-tightly fitted in each of the through bores and has a connecting end projecting toward a connectable device. The connecting end is in the form of a spigot fittable in a socket of the connectable device.

Abstract: A joining structure for joining adjacent members includes a first member and a second member. One end portion of the first member is joined to one end portion of the second member such that protruded portions formed on the one end portion of the first and second members are engaged with corresponding dented portions formed on one end portion of the second and first members, respectively. A hollow joining member is fitted on a joined portion of said first and second members and crimped on the joined portion.

Abstract: An entry board for drilling small holes having a front surface layer made of aluminum or aluminum alloy to be disposed at the drilling inlet side and a back surface layer made of aluminum or aluminum alloy to be disposed at the drilling outlet side. The back surface layer is adhered or joined by clad rolling to said front surface layer. The hardness of the front surface layer is smaller than that of the back surface layer.

Abstract: A corrosion-resistant and brazeable aluminum material. has an aluminum core, and a thermally sprayed layer formed on the core is composed of a brazing metal intermingled with zinc or its alloy. The brazing metal may be a mixture of aluminum and silicon, an aluminum-silicon alloy, a blend of the mixture with the alloy, or silicon. The brazeable aluminum material may be produced by blending a first powder of the brazing metal with a second powder of a corrosion resistant substance including zinc, so as to prepare a powder mixture, and then thermally spraying the powder mixture onto the aluminum core.