JP2005040851A - Joined material, joint structure thereof, method of producing joined material, and body structure of traffic transportation means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joined material in which deformation and strain can be reduced, to provide a joint structure thereof, to provide a method of producing the joined material, and to provide the body structure of a traffic transportation means. <P>SOLUTION: The joined material 3 is used for the body structure of a traffic transportation means such as rolling stock. The joined material 3 is a clad plate with a sandwich structure in which a metal 3a and a metal 3b are joined with a joined material layer 3k. The metal 3a is an aluminum alloy, and the metal 3b is a magnesium alloy. In a state where the joining faces 3i of the metal 3a and the joining faces 3j of the metal 3b are mutually butted, a rotary tool 5 is intruded into the joining faces 3i and 3j shown by the figure under pressing from the side of the metal 3b while being rotated, and is moved along the joining faces 3i and 3j, so that the joining faces 3i and 3j are subjected to friction stir joining. As a result, the joined material 3 can be made long, and further, the joined material 3 reduced in deformation and cracks can be produced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a joint structure of a joining material obtained by joining and joining the first and second metals and a joining material obtained by joining the joining materials at a joint portion, and a joining material obtained by joining and joining the first and second metals. The present invention relates to a manufacturing method and a structure of a transportation means.

  High-strength steel, stainless steel, aluminum alloy, and fiber reinforced plastic (FRP) are used in conventional railcar structures to reduce weight. In particular, aluminum alloy is a lightweight metal material excellent in extrudability, medium strength, and weldability, and is used in high-speed vehicles such as Shinkansen. Such a structure of a conventional railway vehicle is manufactured by a double skin structure method (truss structure), and aluminum alloy hollow extruded materials are brought into contact with each other at end portions in the length direction and arced via a joint member. It is joined and lengthened by welding (refer patent document 1).

JP 2000-272512 A (paragraph numbers 0024 to 0026 and FIG. 4)

  In the conventional structure of a railway vehicle, since hollow extruded members of aluminum alloy are joined together by arc welding, there is a problem that deformation or distortion occurs due to heating during welding. On the other hand, a magnesium alloy is a metal material that has a density of about FRP and is lighter than an aluminum alloy. However, when a magnesium alloy is melt welded, blowholes are generated in the welded portion, making it difficult to obtain a sound welded portion, and since the thermal expansion coefficient is large, welding distortion and deformation increase due to the influence of welding heat. There is a fear. In addition, the friction welding method, which is solid phase bonding, does not generate defects related to solidification phenomena such as blowholes, but it is difficult to apply to thin plates due to significant restrictions on the applicable member shape. For this reason, when applying a magnesium alloy to the structure of a railway vehicle, it is necessary to examine an optimal joining method.

  An object of the present invention is to provide a joining material that can reduce deformation and distortion, a joint structure thereof, a manufacturing method of the joining material, and a structure of a traffic transportation means.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
The invention of claim 1 is a bonding material obtained by laminating and bonding the first (3a) and the second metal (3b), wherein the first metal is an aluminum alloy, and the second metal is: A bonding material characterized in that it is a magnesium alloy, and the first and second metals are friction stir welded, and the first metal is a lightweight structure having a gap (3d). 3).

  The invention according to claim 2 is the bonding material according to claim 1, wherein the lightweight structure is a honeycomb structure or a foam structure.

  Invention of Claim 3 is the joint structure of the joining material which joined the joining material (3) which overlapped and joined the 1st (3a) and 2nd metal (3b) with the joint part (3h), Comprising: The joint material is a joint structure of a joint material, characterized in that the joint portion is friction stir welded.

  According to a fourth aspect of the present invention, there is provided a joint structure for a joint material according to the third aspect, wherein the first metal and the second metal are joined by an adhesive (3k). Structure.

  The invention according to claim 5 is the joint structure for joint material according to claim 3, wherein the first and second metals are friction stir welded.

  The invention according to claim 6 is the joint structure of the joining material according to any one of claims 3 to 5, wherein the joining material has a thermal conductivity of the first and second metals. This is a joint structure of a bonding material characterized in that friction stir welding is performed from the metal (3b) side having a high melting point and a low melting point.

  The invention according to claim 7 is the joint structure of the joining material according to any one of claims 3 to 6, wherein the first metal is an aluminum alloy, and the second metal is magnesium. It is the joint structure of the joining material characterized by being an alloy.

  The invention according to claim 8 is the joint structure for joint material according to claim 7, wherein the aluminum alloy is a lightweight structure having a gap (3d).

  The invention according to claim 9 is the joint structure for bonding material according to claim 8, wherein the lightweight structure is a honeycomb structure or a foam structure.

  The invention of claim 10 is the joint structure of the joining material according to any one of claims 3 to 9, wherein the joining material includes a joining surface (3i) for joining the first metals to each other. The joint structure of the joining material is characterized in that a joining surface (3j) for joining the second metals is a flat surface.

  The invention of claim 11 is the joint structure of the joining material according to any one of claims 3 to 9, wherein the joining material has a joining surface (3j) for joining the second metals together. It is a joint structure of a bonding material characterized by being a stepped surface.

  The invention of claim 12 is a method of manufacturing a bonding material in which the first (3a) and the second metal (3b) are bonded to each other, wherein the first and second metals are bonded by overlapping. Joining step (# 100, 200) and a second joining step (# 110) in which, after the first joining step, the first metal and the second metal are friction-stir joined by a joint (3h). , 210) and a manufacturing method of the bonding material (3).

  According to a thirteenth aspect of the present invention, in the method for manufacturing a bonding material according to the twelfth aspect, the first bonding step is a step of friction stir welding the first and second metals (# 200). The manufacturing method of the joining material characterized by these.

  According to a fourteenth aspect of the present invention, in the method for manufacturing a bonding material according to the twelfth or thirteenth aspect, the first and second bonding steps include thermal conductivity among the first and second metals. It is a manufacturing method of the joining material characterized by being the process of carrying out friction stir welding from the metal (3b) side with high and low melting | fusing point.

  According to a fifteenth aspect of the present invention, in the method for manufacturing a bonding material according to the twelfth aspect, the first bonding step is a step (# 100) of bonding the first and second metals. It is a manufacturing method of the joining material which makes it.

  The invention of claim 16 is a method of manufacturing a joining material in which the first (3a) and the second metal (3b) are overlapped and joined, and the first metals are friction stir welded at the joint (3n). In addition, a first joining step (# 300, # 310) in which the second metals are friction stir joined to each other by a joint portion, and the first and second metals are overlapped after the first joining step. And a second joining step (# 320, # 330) for joining.

  According to a seventeenth aspect of the present invention, in the method for manufacturing a bonding material according to the sixteenth aspect, the second bonding step is a step of bonding the first and second metals (# 320). It is a manufacturing method of the joining material which makes it.

  According to an eighteenth aspect of the present invention, in the method for manufacturing a bonding material according to the sixteenth aspect, the second bonding step is a step (# 330) of friction stir welding of the first and second metals. The manufacturing method of the joining material characterized by these.

  According to a nineteenth aspect of the present invention, in the method for manufacturing a bonding material according to the eighteenth aspect, in the second bonding step, the metal (3b) having a high thermal conductivity and a low melting point among the first and second metals. This is a method for producing a bonding material, which is a step of friction stir welding from the side.

  The invention of claim 20 is a structure (2) of a transportation means (1) comprising the bonding material (3) according to claim 1 or claim 2.

  The invention of claim 21 is a structure (2) of a traffic transport means (1) comprising the joint structure of the bonding material (3) according to any one of claims 3 to 11.

  According to the present invention, deformation and distortion can be reduced.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a structure of a transportation means having a bonding material according to the first embodiment of the present invention.
The transportation means 1 is a railway vehicle such as a train or a train. The structure 2 is the main structure of the traffic transportation means 1. As shown in FIG. 1, the structure 2 supports a weight of a passenger or the like, and constitutes a floor part 2a of the vehicle body and a frame, and a side part of the vehicle body fixed to both edges of the floor structure 2a. A pair of side supports 2b, 2c, a roof support 2d that is fixed to the upper edges of the pair of side supports 2b, 2c and forms the roof portion of the vehicle body, and a wife support (not shown) that forms both ends of the vehicle, etc. ing. The structure 2 is, for example, a double skin structure in which a vehicle outer surface plate and an indoor surface plate formed by the bonding material 3 are coupled by a truss or a rib.

FIG. 2 is a perspective view showing a part of the joining material according to the first embodiment of the present invention by breaking it. FIG. 3 is a cross-sectional view of the bonding material according to the first embodiment of the present invention.
The bonding material 3 is a member obtained by overlapping and bonding the metal 3a and the metal 3b. As shown in FIGS. 2 and 3, the bonding material 3 includes a metal 3a, a metal 3b, and a bonding portion 3c, and has a sandwich structure in which the metal 3a and the metal 3b are overlapped and friction stir bonded. Laminated plate material (cladding material). The bonding material 3 is friction stir bonded from the side of the metal 3b having a high thermal conductivity and a low melting point. For example, the bonding material 3 can be formed to have the same thickness as a plate material constituting the structure of a conventional railway vehicle, and the metal 3b and the metal 3a can be formed to have substantially the same thickness.

The metal 3a is a honeycomb structure (lightweight structure) made of an aluminum alloy and having a gap 3d. Examples of aluminum alloys include 6000 series aluminum alloys that are Al-Mg-Si series alloys and high strength aluminum alloys (duralumin) that are Al-Cu-Mg series alloys. As the aluminum alloy, for example, a stretchable aluminum alloy that can easily produce a plate material or a profile by performing plastic working such as rolling or extrusion is preferable, and has excellent strength and corrosion resistance. A heat treatment type alloy such as a 6000 series aluminum alloy capable of obtaining strength is particularly preferable. The metal 3a is a honeycomb material composed of a core portion 3e having a hexagonal cross section arranged without gaps, and plate-like portions 3f and 3g having a thickness of about 1 mm to 3 mm fixed to both sides of the core portion 3e. A gap 3d is formed in the core 3e. In the first embodiment, it is preferable that the thickness t ₁ of the plate-like portion 3f is thicker than the thickness t ₂ of the plate-like portion 3g so that the metal 3a and the metal 3b are firmly bonded. For example, the thickness t ₁ of the plate-like portion 3f can be formed to about 3 mm, and the thickness t ₂ of the plate-like portion 3g can be formed to about 1 mm.

  The metal 3b is a magnesium alloy extruded material that has been extruded. The magnesium alloy is used as an alloy by adding one or more of aluminum (Al), zinc (Zn), manganese (Mn), zirconium (Zr), rare earth elements and the like. It is preferable that the bonding material 3 has the metal 3a having high strength and rigidity directed to the vehicle outer side and the metal 3b having lower strength and rigidity than the metal 3a directed to the vehicle inner side.

  The joint 3c is a part joined by friction stir welding. The joint portion 3c is a portion where the metal 3b and the plate-like portion 3f are joined when welding by Friction Stir Welding (FSW) with the metal 3a and the metal 3b being overlapped. It is. The joint part 3c is formed at intervals in a direction orthogonal to the length direction of the metals 3a and 3b.

  The welding device 4 is a device for welding the metal 3a and the metal 3b by friction stir welding. As shown in FIG. 3, the welding device 4 includes a rotary tool 5 and a surface plate 6. The rotary tool 5 is a hard round bar that rotates around an axis, and rotates around an axis by a driving device (not shown), and when moving in the horizontal direction, the tool is advanced at an angle of about 3 to 5 degrees with respect to the vertical axis. A corner is given. The rotary tool 5 includes a pin portion 5a and a shoulder portion 5b. The pin portion 5a is a projection portion having a function of friction stirring the joint surface, and is formed at the tip portion of the rotary tool 5, and a screw portion 5c is formed on the outer peripheral surface of the pin portion 5a. The length of the pin portion 5a is designed to be the same as or slightly shorter than the sum of the thickness of the metal 3b and the thickness of the plate-like portion 3f so as to be able to enter the metal 3b and the plate-like portion 3f. The shoulder portion 5b is a step portion having a function of pressing down the metals 3a and 3b stirred by the pin portion 5a. The shoulder portion 5b is formed at a stepped portion at the tip of the rotary tool 5, and the shoulder portion 5b has a tapered surface from the axial center toward the outer periphery so that the outer peripheral portion side is slightly higher than the axial center side. Is formed. The surface plate 6 is a backup material (base) that can withstand the frictional pressure from the rotary tool 5 by sandwiching the bonding material 3 with the rotary tool 5.

Next, a method for manufacturing a bonding material according to the first embodiment of the present invention will be described.
As shown in FIG.2 and FIG.3, it installs in the surface plate 6 in the state which piled up the metal 3b on the metal 3a. Next, the pin portion 5a is pressed into the metal 3b and the plate-like portion 3f from the metal 3b side with a predetermined load, and the rotation tool 5 is rotated at a rotational speed of 880 to 1750 rpm while the length direction of the metals 3a and 3b is set. Move in the orthogonal direction at a moving speed of about 50 to 500 mm / min. As a result, the metal 3a and the plate-like portion 3f are softened by the friction between the rotary tool 5 and plastically flowed so as to be dragged by the rotation of the rotary tool 5, so that the metal 3b and the plate-like portion 3f are below the melting point. Solid phase bonding at a temperature of When the pin portion 5a enters the metal 3b and the plate-like portion 3f and the metal 3b and the plate-like portion 3f are cut, the shoulder portion 5b prevents them from being discharged to the outside, and the shoulder portion 5b Frictional heat is applied to the surface of the metal 3b. The metal 3a and the plate-like portion 3f receive the frictional heat from the pin portion 5a and the frictional heat from the shoulder portion 5b, and a substantially inverted triangular joint portion 3c is formed as shown in FIG.

The bonding material and the manufacturing method thereof according to the first embodiment of the present invention have the effects described below.
(1) In the first embodiment, the metal 3a, which is an aluminum alloy, and the metal 3b, which is a magnesium alloy, are friction stir welded. As a result, it is possible to manufacture the bonding material 3 that can weld different kinds of metals with less deformation and cracking.

(2) In the first embodiment, the metal 3a is a lightweight structure having a gap 3d. For this reason, the weight of the bonding material 3 can be reduced, and the soundproofing effect and the vibration absorbing effect can be improved. In particular, since the metal 3a is a honeycomb structure, the strength of the bonding material 3 can be improved. For example, it is possible to reduce the weight by reducing the thickness of a honeycomb material such as an aluminum alloy constituting the structure of a conventional railway vehicle by half and attaching a magnesium alloy having the same thickness as the thinned portion.

(3) In the first embodiment, friction stir welding is performed from the metal 3b side having a high thermal conductivity and a low melting point. As a result, the frictional heat is transferred from the magnesium alloy side having a high thermal conductivity and a low melting point to the aluminum alloy side and can be processed well.

(Second Embodiment)
FIG. 4 is a cross-sectional view of a bonding material according to the second embodiment of the present invention. In the following, the same parts as those shown in FIGS. 2 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.
The metal 3a shown in FIG. 4 is a foam structure (lightweight structure) having a gap 3d. Metal 3a is a plate-shaped foam metal material void portion 3d is formed between the thickness t ₁ and the plate-like portion 3f of approximately 3mm thickness t ₂ is a plate-like portion 3g of about 1 mm, air gap The portion 3d and the plate-like portions 3f and 3g are integrally formed. The metal 3a is a porous metal body having a three-dimensional network structure and a remarkably large porosity, and is manufactured by adding a gas generating material to molten metal or sintering a metal around a skeleton of a foamed resin. The In the second embodiment, in addition to the effects of the first embodiment, since the gap 3d is formed in the metal 3a, the weight can be further reduced, and the soundproofing effect and the vibration absorbing effect can be improved. Can do.

(Third embodiment)
FIG. 5 is a perspective view in which a part of the bonding material according to the third embodiment of the present invention is omitted. FIG. 6 is a cross-sectional view of a bonding material according to a third embodiment of the present invention, FIG. 6 (A) is a cross-sectional view showing a state before welding, and FIG. 6 (B) shows a state during welding. It is sectional drawing.
5 and 6 includes a joint structure in which the metal 3a is a plate material (bulk material) made of an aluminum alloy and is friction stir welded at the joint portion 3h. In the bonding material 3, the metal 3 a and the metal 3 b are overlapped and bonded by the adhesive layer 3 k, and the joint portion 3 h is an end portion in the length direction of the bonding material 3 as shown in FIG. This is a butt joint formed by joining the joint surfaces 3i of the metal 3a and the joint surfaces 3j of the metal 3b in a state of butting in a straight line. The joining surfaces 3i and 3j are flat surfaces as shown in FIGS. 5 and 6A.

  The adhesive layer 3k is a member that joins the metal 3a and the metal 3b. Examples of adhesives include two-component adhesives (reactive adhesives) such as epoxy-based and isocyanate-based adhesives, thermosetting adhesives such as epoxy-based and phenol-based adhesives, and anion at high speed by moisture in the air. An α-cyanoacrylate type instantaneous adhesive which is cured by polymerization is preferable. The adhesive layer 3k is preferably formed with a strong adhesive such as an epoxy adhesive when heat-treated after application, and formed with another adhesive other than the epoxy adhesive when not heat-treated after application. You can also.

Next, a method for manufacturing a bonding material according to a third embodiment of the present invention will be described.
FIG. 7 is a process diagram for explaining the manufacturing method of the bonding material according to the third embodiment of the present invention.
Adhesion step # 100 is a step in which the metal 3a and the metal 3b are overlapped and bonded. As shown in FIG. 6, an adhesive is applied between the metal 3a and the metal 3b to form an adhesive layer 3k. The metal 3a and the metal 3b are joined. Friction stir welding step # 110 is a step of friction stir welding the metals 3a and 3b after the bonding step # 100 with the joint 3h. In this friction stir welding step # 110, the joining surfaces 3i of the metal 3a and the joining surfaces 3j of the metal 3b are brought into contact with each other and the metal 3b is attached to the joining surfaces 3i and 3j while rotating the rotary tool 5 shown in FIGS. The pin portion 5a is pressed and entered from the side, and moved along the joining surfaces 3i and 3j to friction stir join the joining surfaces 3i and the joining surfaces 3j.

  In this 3rd Embodiment, while joining material 3 which joined dissimilar metals can be friction-stir-joined by the joint part 3h, the joining material 3 can be lengthened, and manufacturing the joining material 3 with few deformation | transformation and a crack is manufactured. can do.

(Fourth embodiment)
FIG. 8 is a cross-sectional view of a bonding material according to a fourth embodiment of the present invention, FIG. 8 (A) is a cross-sectional view showing a state before welding, and FIG. 8 (B) shows a state during welding. It is sectional drawing. FIG. 9 is a process diagram for explaining the manufacturing method of the bonding material according to the fourth embodiment of the present invention.
In the bonding material 3 shown in FIG. 8, the metal 3a and the metal 3b are bonded at the bonding portion 3c by friction stir welding, and the bonding surfaces 3i and the bonding surfaces 3j are abutted against each other and friction stir bonded at the joint portion 3h. It has a joint structure. The friction stir welding process # 200 shown in FIG. 9 is a process in which the metal 3a and the metal 3b are overlapped and friction stir welding is performed at the joint 3c, and the friction stir welding process # 210 is a third process in which the metal 3a and the metal 3b are joined together. This is a step of friction stir welding at the joint 3h as in the embodiment. The fourth embodiment has the same effect as the third embodiment.

(Fifth embodiment)
FIG. 10 is a cross-sectional view of a bonding material according to a fifth embodiment of the present invention, FIG. 10 (A) is a cross-sectional view showing a state before welding, and FIG. 10 (B) shows a state during welding. It is sectional drawing.
The bonding material 3 shown in FIG. 10 is a honeycomb structure in which the metal 3a has a gap 3d, and has a joint structure in which the joint surfaces 3i and the joint surfaces 3j are brought into contact with each other and friction stir welded at the joint portion 3h. . In the bonding material 3, the metal 3 a and the metal 3 b are overlapped and bonded by the adhesive layer 3 k, and the joint portion 3 h is a metal 3 a bonding surface 3 i that is an end portion in the length direction of the bonding material 3 and the metal. The joint surfaces 3j of 3b are joined and formed in a state of abutting on a straight line. In the metal 3a, a thick portion 3m is formed at the end in the length direction, and a joining surface 3i is formed on the outer end surface of the thick portion 3m. The thickness L of the thick part 3m is designed to be slightly larger than the radius of the rotary tool 5. The bonding material 3 is manufactured by the same process as the process shown in FIG. 7, and the fifth embodiment has the same effects as the first and fourth embodiments.

(Sixth embodiment)
FIG. 11 is a cross-sectional view of a joining material according to a sixth embodiment of the present invention, FIG. 11 (A) is a cross-sectional view showing a state before welding, and FIG. 11 (B) shows a state during welding. It is sectional drawing.
A bonding material 3 shown in FIG. 11 is a foam structure in which a metal 3a has a gap 3d, and a thick portion 3m is formed on the metal 3a as in the fifth embodiment. The bonding material 3 is manufactured by the same process as the process shown in FIG. 7, and the sixth embodiment has the same effects as the first and fourth embodiments.

(Seventh embodiment)
12 is a cross-sectional view of a bonding material according to a seventh embodiment of the present invention, FIG. 12 (A) is a cross-sectional view showing a state before welding, and FIG. 12 (B) is a cross-sectional view showing a state during welding. FIG.
In the bonding material 3 shown in FIG. 12, the bonding surface 3i for bonding the metals 3a to each other is a flat surface, and the bonding surface 3j for bonding the metals 3b to each other is a step surface. The diameter of the pin portion 5a is designed to be slightly larger than the height H of the step surface of the joint surface 3j. The bonding material 3 is manufactured by the same process as that shown in FIG. In the seventh embodiment, in addition to the effects of the third embodiment, since the joint surface 3j is a stepped surface, the area of the joint is increased. As a result, it is possible to widen the joint area on the magnesium alloy side where fatigue cracks are likely to occur compared to aluminum alloys, and to prevent the fatigue cracks from proceeding in a straight line.

(Eighth embodiment)
FIG. 13 is a process diagram for explaining the manufacturing method of the bonding material according to the eighth embodiment of the present invention. FIG. 14 is a cross-sectional view for explaining a manufacturing method of a bonding material according to an eighth embodiment of the present invention, and FIGS. 14A and 14B show a friction stir welding process, and FIG. 14C is an adhesion process. Indicates.
The friction stir welding step # 300 shown in FIG. 13 is a step of friction stir welding the metals 3a at the joint 3n as shown in FIG. 14A, and the friction stir welding step # 310 is shown in FIG. 14B. As shown, it is a step of friction stir welding the metals 3b at the joint 3p. The adhesion process # 320 is a process in which the metal 3a and the metal 3b are overlapped and adhered by the adhesive layer 3k after the friction stir welding processes # 300 and # 310 as shown in FIG. The eighth embodiment has the same effect as that of the third embodiment. After the metals 3a and 3b are lengthened by friction stir welding, the metal 3a and 3b are bonded and lengthened. 3 can be manufactured.

(Ninth embodiment)
FIG. 15 is a process diagram for explaining the manufacturing method of the bonding material according to the ninth embodiment of the present invention. FIG. 16: is sectional drawing for demonstrating the manufacturing method of the joining material which concerns on 9th Embodiment of this invention, and FIG. 16 (A)-(C) shows a friction stir welding process. In FIG. 5, the same steps as those shown in FIG. 13 are denoted by the same reference numerals and detailed description thereof is omitted.
The friction stir welding step # 330 shown in FIG. 15 is performed as shown in FIG. 16C after the friction stir welding step # 300 shown in FIG. 16A and the friction stir welding step # 310 shown in FIG. In this step, the metal 3a and the metal 3b are superposed and friction stir welded at the joint 3c. The ninth embodiment has the same effects as the eighth embodiment.

(Other embodiments)
The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the case where the bonding material 3 is applied to the structure 2 of the railway vehicle has been described as an example. However, the present invention is also applied to the structure of other transportation means such as an automobile, a ship, and an aircraft. can do. In this embodiment, the case where two kinds of metals 3a and 3b are joined is described as an example. However, the present invention can also be applied to a joining material obtained by laminating and joining two or more kinds of metals. . Furthermore, in this embodiment, the case where the pin portion 5a has the screw portion 5c and the shoulder portion 5b has a tapered surface has been described as an example, but the present invention is not limited to this. For example, the pin portion 5a may be tapered, the screw portion 5c may be omitted, or the shoulder portion 5b may be a horizontal plane.

(2) In this embodiment, the case where the thicknesses of the metal 3a and the metal 3b are the same has been described as an example. However, any thickness is considered in consideration of the price, rigidity, ease of processing, and the like of the metal material. Can be Moreover, in this 5th Embodiment-7th Embodiment, although the metal 3a and the metal 3b are joined by the adhesive bond layer 3k, these can also be joined by friction stir welding. Furthermore, in the seventh embodiment, the case where the joining surface 3j of the metal 3b is a stepped surface has been described as an example, but the joining surface 3j of the fourth to sixth embodiments may be a stepped surface. it can.

It is sectional drawing of the structure of a traffic transport means provided with the joining material which concerns on 1st Embodiment of this invention. It is a perspective view which fractures | ruptures and shows a part of joining material which concerns on 1st Embodiment of this invention. It is sectional drawing of the joining material which concerns on 1st Embodiment of this invention. It is sectional drawing of the joining material which concerns on 2nd Embodiment of this invention. It is a perspective view which abbreviate | omits and shows a part of joining material which concerns on 3rd Embodiment of this invention. It is sectional drawing of the joining material which concerns on 3rd Embodiment of this invention, (A) is sectional drawing which shows the state before welding, (B) is sectional drawing which shows the state in welding. It is process drawing for demonstrating the manufacturing method of the joining material which concerns on 3rd Embodiment of this invention. It is sectional drawing of the joining material which concerns on 4th Embodiment of this invention, (A) is sectional drawing which shows the state before welding, (B) is sectional drawing which shows the state during welding. It is process drawing for demonstrating the manufacturing method of the joining material which concerns on 4th Embodiment of this invention. It is sectional drawing of the joining material which concerns on 5th Embodiment of this invention, (A) is sectional drawing which shows the state before welding, (B) is sectional drawing which shows the state in welding. It is sectional drawing of the joining material which concerns on 6th Embodiment of this invention, (A) is sectional drawing which shows the state before welding, (B) is sectional drawing which shows the state during welding. It is sectional drawing of the joining material which concerns on 7th Embodiment of this invention, (A) is sectional drawing which shows the state before welding, (B) is sectional drawing which shows the state during welding. It is process drawing for demonstrating the manufacturing method of the joining material which concerns on 8th Embodiment of this invention. It is sectional drawing for demonstrating the manufacturing method of the joining material which concerns on 8th Embodiment of this invention, (A) (B) shows a friction stir welding process, (C) shows an adhesion process. It is process drawing for demonstrating the manufacturing method of the joining material which concerns on 9th Embodiment of this invention. It is sectional drawing for demonstrating the manufacturing method of the joining material which concerns on 9th Embodiment of this invention, (A)-(C) shows a friction stir welding process.

Explanation of symbols

1 Transportation means (railcar)
2 Structure 3 Bonding material 3a Metal (first metal)
3b metal (second metal)
3c Joint part 3d Cavity part 3h Joint part 3i, 3j Joint surface 3k Adhesive layer 3n, 3p Joint part 5 Rotating tool 5a Pin part 5b Shoulder part

Claims (21)

A bonding material obtained by laminating and bonding the first and second metals,
The first metal is an aluminum alloy;
The second metal is a magnesium alloy;
The first and second metals are friction stir welded;
The first metal is a lightweight structure having a void;
A bonding material characterized by The bonding material according to claim 1,
The lightweight structure is a honeycomb structure or a foam structure;
A bonding material characterized by It is a joint structure of a joining material obtained by joining the joining materials obtained by laminating and joining the first and second metals at the joint portion,
The bonding material is friction stir welded at the joint,
A joint structure of a bonding material characterized by In the joint structure of the bonding material according to claim 3,
The first and second metals are joined by an adhesive;
A joint structure of a bonding material characterized by In the joint structure of the bonding material according to claim 3,
The first and second metals are friction stir welded;
A joint structure of a bonding material characterized by In the joint structure of the joining material according to any one of claims 3 to 5,
The bonding material is friction stir welded from the metal side of the first and second metals having a high thermal conductivity and a low melting point,
A joint structure of a bonding material characterized by In the joint structure of the joining material according to any one of claims 3 to 6,
The first metal is an aluminum alloy;
The second metal is a magnesium alloy;
A joint structure of a bonding material characterized by In the joint structure of the bonding material according to claim 7,
The aluminum alloy is a lightweight structure having voids;
A joint structure of a bonding material characterized by In the joint structure of the bonding material according to claim 8,
The lightweight structure is a honeycomb structure or a foam structure;
A joint structure of a bonding material characterized by In the joint structure of the joining material according to any one of claims 3 to 9,
In the bonding material, a bonding surface for bonding the first metals and a bonding surface for bonding the second metals are flat surfaces,
A joint structure of a bonding material characterized by In the joint structure of the joining material according to any one of claims 3 to 9,
The bonding material has a stepped surface as a bonding surface for bonding the second metals,
A joint structure of a bonding material characterized by A method for producing a bonding material in which first and second metals are overlap-bonded,
A first joining step of superposing and joining the first and second metals;
A second joining step of performing friction stir welding of the first metals and the second metals at a joint portion after the first joining step;
The manufacturing method of the joining material containing this. In the manufacturing method of the joining material according to claim 12,
The first joining step is a step of friction stir welding the first and second metals;
The manufacturing method of the joining material characterized by these. In the manufacturing method of the joining material according to claim 12 or claim 13,
The first and second joining steps are steps of friction stir welding from the metal side having a high thermal conductivity and a low melting point among the first and second metals,
The manufacturing method of the joining material characterized by these. In the manufacturing method of the joining material according to claim 12,
The first joining step is a step of bonding the first and second metals;
The manufacturing method of the joining material characterized by these. A method for producing a bonding material in which first and second metals are overlap-bonded,
A first joining step in which the first metals are friction stir welded at a joint portion, and the second metals are friction stir welded at a joint portion;
A second joining step of superposing and joining the first and second metals after the first joining step;
The manufacturing method of the joining material containing this. In the manufacturing method of the joining material according to claim 16,
The second bonding step is a step of bonding the first and second metals;
The manufacturing method of the joining material characterized by these. In the manufacturing method of the joining material according to claim 16,
The second joining step is a step of friction stir welding the first and second metals;
The manufacturing method of the joining material characterized by these. In the manufacturing method of the joining material according to claim 18,
The second joining step is a step of friction stir welding from the metal side having a high thermal conductivity and a low melting point among the first and second metals,
The manufacturing method of the joining material characterized by these.   A structure of a traffic transportation means comprising the bonding material according to claim 1. A structure of a traffic transportation means comprising the joint structure of the joining material according to any one of claims 3 to 11.

Images