Abstract: Structure including joint structure of dissimilar materials comprises a roof panel and a skeletal body. The roof panel has a bent portion at its end and is a panel member made of an aluminum alloy. The skeletal body has a support portion for supporting the first member and is made of steel. The roof panel and the skeletal body are joined by continuous welding of a vicinity of an apex of the bent portion of the roof panel and the support portion of the skeletal body, a reinforcing plate is joined to the roof panel at least partially along the joining portion with the skeletal body.

Abstract: In a joining method for members, a tube body having a center axis L, a wall surface body having a hole portion through which the tube body can be inserted, and an elastic body that can be inserted in the tube body are prepared. The tube body has an inner rib extending in a direction of the center axis so as to partition an inside thereof, and the inner rib has notches cut from a lower end of the inner rib in the direction of the center axis. Next, the tube body is inserted through the hole portion in the wall surface body, and the elastic body is inserted into internal spaces partitioned by the inner rib of the tube body. Furthermore, the elastic body is compressed in the direction of the center axis of the tube body and expanded outward in a radial direction with respect to the center axis, whereby an end of the tube body is expanded and deformed to be joined to the wall surface body by press-fitting.

Abstract: A method for joining members according to an embodiment of the present invention includes: providing a bumper stay including two integrated pipe portions extending in an identical direction, the bumper stay including a recess provided between the pipe portions being adjacent to each other, the recess extending in a longitudinal direction of the pipe portions from end surfaces of the pipe portions, a part of the recess serving as a locking portion, and a bumper beam including a rear inclined wall formed with two hole portions into which the pipe portions of the bumper stay are insertable respectively; inserting the bumper stay into the hole portions of the bumper beam until the locking portion abuts on the rear inclined wall; and pipe-expanding an insertion portion of the bumper stay into the bumper beam to join the insertion portion to the bumper beam by press-fitting.

Abstract: A method for joining members includes: providing a wall surface body which is a die-molded article provided with a hole portion with a draft angle provided from its opposite end portions toward its center portion, a tubular body with a hollow shape, and an elastic body; inserting the tubular body into the hole portion in the wall surface body; inserting the elastic body into the inside of the tubular body; and compressing the elastic body in the direction of an axial line L of the tubular body to expand the elastic body outwardly in the radial direction of the axial line L, thereby deforming and expanding the tubular body to joint the tubular body to the wall surface body by press-fitting.

Abstract: In a method for joining members of the present invention, a B-pillar, a rocker, a side panel served as frame members of a vehicle body, and an elastic body are provided. The B-pillar includes a tubular portion and an extension portion extended from the tubular portion. The rocker includes a first hole portion. The side panel includes a support portion. Next, the tubular portion of the B-pillar is inserted into the first hole portion of the rocker. The elastic body is inserted into the tubular portion of the rocker. The elastic body is pressurized in an axial line L1 direction of the tubular portion of the B-pillar to be expanded outward in a radial direction of the axial line L1, so that the tubular portion of the B-pillar is expanded and deformed to be joined to the first hole portion of the rocker by press-fitting. Further, the extension portion of the B-pillar and the support portion of the side panel are joined by a method different from joining by press-fitting.

Abstract: In a method for manufacturing a composite cross-section member, a continuous steel sheet is fed to a manufacturing device and bent and roll-formed into a predetermined cross-sectional shape, a discontinuous aluminum core is locally inserted at an arbitrary stage of the roll forming, and the steel sheet is bent such that the core and the steel sheet are integrated, to obtain a composite cross-section member.

Abstract: Disclosed is a joining method of members, which includes the steps of: preparing a first member in which a first hole portion having a polygonal cross-sectional shape is formed, and a second member having a hollow shape, wherein the second member has a cross-sectional shape corresponding to the polygonal cross-sectional shape of the first hole portion, the second member including a plurality of straight line portions extending linearly and corner portions positioned between the adjacent two straight line portions in the cross-sectional shape; inserting the second member into the first hole portion of the first member; and caulking and joining the second member to the first member by enlarging and deforming the corner portions.

Abstract: The joining method for members according to the present invention includes: providing an aluminum component including an insertion hole provided with a rib in at least part of an edge part, and a hollow steel pipe; inserting the steel pipe into the insertion hole of the aluminum component; and expanding and deforming the steel pipe to join the steel pipe to the aluminum component by press-fitting.

Abstract: A side member (example of second member) having a hollow shape is inserted into holes formed in a cross member (example of first member) (member insertion step). The cross member and the side member are joined by caulking by expanding an insertion portion of the side member from the inside of the insertion portion (caulked junction step). The insertion portion of the side member is a portion inserted into the cross member.

Abstract: A method of bonding a first frame member and a second frame member includes: a protrusion formation step of forming a protrusion in a predetermined region of a plate by press fabrication; a stacking step of producing such a stack body of flanges and the plate that a leading end of the protrusion of the plate contacts with the flange and the flange is disposed between the flange and the plate; and a welding step of welding the protrusion to the flange by applying welding current between a pair of electrodes while the stack body is sandwiched between the pair of electrodes so that the protrusion is pressed against the flange.

Abstract: In a method for joining bumper members, a bumper reinforcement including a rear inclined wall provided with a hole, and a bumper stay in a hollow shape are prepared. The method for joining bumper members includes the steps of: inserting the bumper stay through the hole of the bumper reinforcement to pass through the rear inclined wall; inserting rubber into the bumper stay; and compressing the rubber in a direction of an axis L of the bumper stay to expand the rubber outward from inside to expand and deform at least a portion of the bumper stay inserted into the hole, thereby joining the bumper stay to the rear inclined wall by press-fitting.

Abstract: A method for joining members of the present invention is as follows: a second member is inserted through a hole part of a first member; a guide shaft is inserted through a through hole of rubber; the rubber with the guide shaft inserted is inserted into the second member; and a drive mechanism relatively moves pushers and toward each other to compress the rubber in the extending direction of the guide shaft so that the rubber is expanded outward from inside to expand and deform at least a portion of the second member inserted into the hole part, thereby joining the second member to the first member.

Abstract: A joined body of dissimilar metals, in which a flared joint is formed and which have a high joint strength, is provided. The joined body contains a first metal member having a curved surface portion, a second metal member having a higher melting point than the first metal member and joined to the first metal member to form the flared joint, and a joining metal portion formed by irradiating the first metal member and a filler material disposed between the first and second metal members with a laser. An intermetallic compound formed at the interface between the second metal member and the joining metal portion has a thickness of at most 3 ?m. A melted portion and a non-melted portion are formed in the curved surface portion of the first metal member in which the flared joint is formed.

Abstract: Structure including joint structure of dissimilar materials comprises a roof panel and a skeletal body. The roof panel has a bent portion at its end and is a panel member made of an aluminum alloy. The skeletal body has a support portion for supporting the first member and is made of steel. The roof panel and the skeletal body are joined by continuous welding of a vicinity of an apex of the bent portion of the roof panel and the support portion of the skeletal body, a reinforcing plate is joined to the roof panel at least partially along the joining portion with the skeletal body.

Abstract: The objective of the present invention is to provide a joined body of dissimilar metals, in which a flared joint is formed and which have a high joint strength. The present invention is provided with a first metal member (11) having a curved surface portion (15), a second metal member (12) having a higher melting point than the first metal member (11) and joined to the first metal member (11) to form a flared joint, and a joining metal portion (13) formed by irradiating with a laser a filler material, disposed at the joint portion between the first metal member (11) and the second metal member (12), and the first metal member (11). The maximum thickness of an intermetallic compound (14) formed at the interface between the second metal member (12) and the joining metal portion (13) is at most 3 [mu]m.

Abstract: The invention provides a structural member of different materials having no different-material-bonded part between aluminum alloy material and steel material to be assembled. The structural member of different materials comprised of steel and aluminum alloy includes a first structural member including steel, and a second structural member having a part including steel and a part including aluminum alloy, the part including steel and the part including aluminum alloy being bonded by different-material bonding. The first structural member and the second structural member are bonded together only by bonding of steels between the part including steel of the second structural member and the first structural member.

Abstract: A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion.

Abstract: The bumper stay includes a cylindrical shaft member fit in to a hole of a bumper reinforce, a cylindrical reinforcing member fit in to the outer periphery of the shaft member in the rear side of the bumper reinforce, and a mounting flange member fit in to the outer periphery of the shaft member in its rear end. The shaft member is enlarged by electromagnetic forming and is tightly adhered to the inner peripheral surface of the hole formed in the bumper reinforce, the inner peripheral surface of the reinforcing member, and the inner peripheral surface of the hole flange formed in the mounting flange member, thereby these are joined with each other. Thin aluminum alloy extruded material can be used for the shaft member.

Abstract: The bumper system for a vehicle body includes a vehicle body bumper beam of a hollow construction with an impact buffer member arranged in the front side. The impact buffer member is provided with a collision wall part, side wall parts and joint flanges and is integrally formed by a metallic material, the collision wall part and the side wall parts forming a sectional shape of approximately U-shape which embraces the bumper beam. The joint flanges are joined with the flanges protruding from the rear wall of the bumper beam and support the impact buffer member from the rear wall side of the bumper beam.

Abstract: An automobile body reinforcement including a hollow aluminum alloy extrusion having an approximately rectangular cross-section is structured as follows: (a) a front wall, a rear wall, an upper horizontal wall, a lower horizontal wall, and an intermediate horizontal wall are provided; (b) the front and rear walls are each at least 3 mm thick; (c) the upper and lower horizontal walls divide each of the front and rear walls thereby defining upper and lower end portions of each of the front and rear walls as flange portions; and (d) the front wall has a concave portion formed in a middle portion thereof and the concave portion is connected to a front end of the intermediate wall.