JP2011068270A - Metal material and railway vehicle body structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal material and a railway vehicle body structure using the same capable of easily securing adhesion in a connecting part. <P>SOLUTION: In a frame member 30, a sectional shape when seeing a flange part 33 from the sectional direction of the frame member 30 is circularly curved so as to be projected toward an outer plate 20 side. Therefore, when the flange part 33 of the frame member 30 is superposed on the outer plate 20, the tip part of the flange part 33 linearly abuts on the outer plate 20, and a superposition part having a gap within a permissible amount exists with a certain width on both sides of the abutting part between the flange part 33 and the outer plate 20. Consequently, in a case where a plane part of the flange part is allowed to abut on a plane part of the outer plate like a conventional frame member, the control of a place exceeding the permissible gap amount is difficult, whereas in the frame material 30, the adhesion of the abutting part between the flange part 33 and the outer plate 20 can be easily secured by only superposing the flange part 33 on the outer plate 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a metal material and a railway vehicle structure using the same.

  2. Description of the Related Art Conventionally, for example, when manufacturing a railway vehicle structure, for example, a cross-section hat-shaped bone member is joined to the inside of an outer plate by laser welding or the like. For example, in the method of welding a railcar outer plate / accompaniment described in Patent Document 1, a polishing eye of the outer plate and an accessory such as a bone member is aligned in one direction, and a laser weld is formed in the direction of the polishing eye. is doing.

JP 2006-341300 A

  By the way, in the joining of metal materials such as the outer plate and the bone member as described above, from the viewpoint of securing the joining strength, the adhesiveness of the joining portion in each metal material when joining is important. Therefore, as a general method, a method of pressing the flange portion of the bone member against the outer plate with a pressure roller or the like attached to the welding head, or sandwiching the flange portion of the bone member and the outer plate using a restraining jig A fixing method is adopted. However, in the former case, the location where the welded portion is formed may be limited by the arrangement of the pressure roller, and in the latter case, an increase in the size of the apparatus becomes a problem.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a metal material that can easily ensure the adhesion of the joint portion, and a railway vehicle structure using the metal material.

  In order to solve the above problems, a metal material according to the present invention is a metal material that is used as a bone member joined to an outer plate of a railway vehicle structure and has a flange portion that can be overlapped on one surface side of the outer plate. The cross-sectional shape when the flange portion is viewed from the cross-sectional direction of the metal material is characterized by being curved in a circular shape so as to be convex toward the outer plate side.

  In this metal material, the cross-sectional shape when the flange portion is viewed from the cross-sectional direction of the metal material is curved in a circular shape so as to be convex toward the outer plate side. For this reason, when the flange portion of the metal material is superposed on one surface side of the outer plate, the tip portion of the circularly bent flange portion comes into linear contact with both the contact portions of the flange portion and the outer plate. On the side, there is an overlapped portion having a certain width that is equal to or less than a gap amount (hereinafter referred to as “allowable gap amount”) allowed between the outer plates at the time of joining. Therefore, in the case where the flat portion of the flange portion is brought into contact with the flat portion of the outer plate as in the conventional metal material, it is difficult to control the location where the allowable gap amount is exceeded. The adhesiveness of the contact portion between the flange portion and the outer plate can be easily ensured only by superimposing the flange portion on the outer plate.

  In addition, the width of the planned joining region viewed from the cross-sectional direction of the metal material in the flange portion is W, the plate thickness of the metal material is T, and the gap amount allowed between the outer plate at the time of joining is A times the plate thickness. It is preferable that the radius of curvature R of the cross-sectional shape in the flange portion satisfies the formula (1). By satisfying this condition, it is possible to make the gap amount of the overlapping portion of the flange portion and the outer plate equal to or less than the allowable gap amount in the entire width of the joining planned region.

  In addition, a railway vehicle structure according to the present invention includes an outer plate and the metal material superimposed so that the flange portion comes into contact with one surface side of the outer plate, along the contact portion between the outer plate and the flange portion. It is characterized in that a weld is formed.

  In this railway vehicle structure, the cross-sectional shape when the flange portion of the metal material is viewed from the cross-sectional direction of the metal material is curved in a circular shape so as to be convex toward the outer plate side. For this reason, when the flange portion of the metal material is overlapped on one surface side of the outer plate, the tip portion of the flange portion that is curved in a circular shape reliably comes into contact with both sides of the contact portion between the flange portion and the outer plate. In this case, there is an overlapped portion having a certain width that is equal to or less than the allowable gap amount. Since the weld formed along the contact portion between the outer plate and the flange portion is formed soundly with the gap amount appropriately suppressed, the bonding strength between the outer plate and the bone member is sufficiently ensured. The

  Moreover, it is preferable that a welding part is a laser welding part. By suppressing the gap amount at the contact portion between the flange portion and the outer plate, a sound laser welded portion can be obtained. When laser welding is used, heat input to the metal material and the outer plate is suppressed, and a railway vehicle structure with small deformation can be obtained.

  According to the metal material according to the present invention, it is possible to easily ensure the adhesion of the joint portion. Thereby, a railway vehicle structure in which the bonding strength between the outer plate and the bone member is sufficiently secured is obtained.

1 is a perspective view showing an embodiment of a railway vehicle structure according to the present invention. It is a perspective view which shows the structure of a side structure. It is a side view which shows the structure of a bone member.

  Hereinafter, preferred embodiments of a metal material and a railway vehicle structure according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a railway vehicle structure according to the present invention. As shown in the figure, the railway vehicle structure 1 includes a floor structure 2, a side structure 3, a roof structure 4, and a wife structure 5, and these structures are joined to each other, thereby It has a box shape with a space to accommodate it inside.

  The floor structure 2 is disposed at the bottom of the railway vehicle structure 1 as a structure constituting the floor of the vehicle. The side structure 3 and the wife structure 5 are erected so as to surround the left and right edges and the front and rear edges of the floor structure 2 as structures constituting the side part of the vehicle. The side structure 3 is provided with a plurality of door portions 6 (for example, three locations) at equal intervals for passengers / occupants to get on and off.

  In addition, window portions 7 are provided between the door portions 6 and 6 and at both ends of the side structure 3. The wife structure 5 is provided with an entrance / exit 8 for passengers / occupants to move between vehicles. The roof structure 4 is arranged so as to cover the space above the structure of the railway vehicle as a structure constituting the roof portion of the vehicle. The roof structure 4 of the vehicle is provided with an air conditioner, a pantograph (not shown), and the like for adjusting the temperature inside the vehicle.

  Next, the configuration of the side structure 3 will be described in more detail. FIG. 2 is a perspective view showing the configuration of the side structure 3. As shown in FIG. 2, the side structure 3 includes an outer plate 20 and a plurality of bone members 30. The outer plate 20 is a member constituting the outer wall portion of the vehicle. The outer plate 20 is made of, for example, stainless steel (SUS301L) having a thickness of about 1.2 mm, and has a rectangular shape with a length of 940 mm.

  The bone member 30 has a rectangular top portion 31, web portions 32, 32 rising from both sides in the width direction of the top portion 31, and flange portions 33, 33 projecting outward from the tips of the web portions 32, 32. It is a cross-sectional hat-shaped member (hat material). The bone member 30 is made of stainless steel (SUS301L) having a thickness of 0.8 mm, for example, and has a long shape corresponding to the length of the outer plate 20. Moreover, the width | variety of the top part 31 is 50 mm, for example, and the height of the web part 32 is 35 mm, for example.

  The bone member 30 is arranged in parallel in the height direction of the vehicle at a pitch of 200 mm, for example, with the top portion 31 facing the inside of the vehicle, and is formed by a laser welded portion W1 formed in a spot shape along the flange portions 33, 33. The outer plate 20 is firmly joined.

  Here, as shown in FIG. 3, the flange portion 33 in the bone member 30 is curved in a circular shape so that the cross-sectional shape when viewed from the cross-sectional direction of the bone member 30 is convex toward the outer plate 20 side. is doing. More specifically, the radius of curvature R of the flange portion 33 is derived as follows.

First, in the lap welding by laser, when the thickness of the bone member 30 is T, and the gap amount (allowable gap amount) allowed with the outer plate 20 at the time of joining is A times the plate thickness, the gap amount G is It is necessary to satisfy the following formula (1). The value A is a value that is appropriately set according to the required strength of the weld, and is generally A = 0.1 in laser welding.

Further, assuming that the width of the region to be joined viewed from the cross-sectional direction of the bone member 30 in the flange portion 33 is W and the center angle of the arc corresponding to W is θ (see FIG. 3), the curvature radius R, the gap amount G, and The relationship with the central angle θ is expressed by Equation (2) and Equation (3).

When θ is eliminated using Equation (2) and Equation (3), Equation (4) is obtained.

Then, Expression (5) is obtained by substituting Expression (1) into Expression (4).

In this embodiment, if the value A = 0.1, the plate thickness T = 0.8 mm of the bone member 30, and the width W of the planned joining region W = 8 mm, from the formula (5), The condition for the gap amount G to be equal to or less than the allowable gap amount is estimated as the curvature radius R ≧ 100.04 mm. In general, since the values A <0.1 and T << W, the radius of curvature R can be approximated as shown in Expression (6).

  As described above, in the bone member 30, the cross-sectional shape when the flange portion 33 is viewed from the cross-sectional direction of the bone member 30 is curved in a circular shape so as to be convex toward the outer plate 20 side. For this reason, when the flange portion 33 of the bone member 30 is overlapped on one surface side of the outer plate 20, the tip portion of the flange portion 33 curved in a circular shape comes into contact with the outer plate 20 linearly, On both sides of the abutting portion with the outer plate 20, overlapping portions that are equal to or less than the allowable gap amount exist with a certain width.

  Therefore, when the flat portion of the flange portion is brought into contact with the flat portion of the outer plate as in the prior art, it is difficult to control the portion that exceeds the allowable gap amount, whereas the flange portion 33 is attached to the outer plate 20. The adhesion of the contact portion between the flange portion 33 and the outer plate 20 can be easily ensured only by superimposing them.

  When the flange portion 33 and the outer plate 20 are welded, it is not necessary to press the bone member 30 with a pressure roller or to fix the bone member 30 to the outer plate 20 with a restraining jig, so that workability is improved. Figured. Further, the location of the welded portion is not limited by the arrangement of the pressure roller, and the problem of upsizing of the apparatus due to the introduction of the restraining jig can be avoided.

  In the railway vehicle structure 1 manufactured using the bone member 30, the laser welded portion W1 formed along the contact portion between the outer plate 20 and the flange portion 33 is formed soundly in a state of an allowable gap amount or less. Therefore, the bonding strength between the outer plate 20 and the bone member 30 is sufficiently ensured. In laser welding, heat input to the bone member 30 and the outer plate 20 is suppressed, so that the railway vehicle structure 1 with small deformation can be obtained.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the bone member 30 having a hat-shaped cross section is illustrated. However, the member is not limited to a hat having a cross-sectional shape as long as the member has a flange portion to be brought into contact with the outer plate 20, A flange portion such as a member having a Z-shaped cross section may be curved in a circular shape so as to be convex toward the outer plate 20. In the above-described embodiment, the side structure 3 constituted by the bone member 30 and the outer plate 20 is illustrated, but the same structure can be applied to the roof structure 4 and the wife structure 5.

  DESCRIPTION OF SYMBOLS 1 ... Railway vehicle structure, 20 ... Outer plate, 30 ... Bone member (metal material), 33 ... Flange part, G ... Gap amount, R ... Radius of curvature, T ... Plate thickness of bone member, W ... Width of area to be joined , W1... Laser welding part.

Claims (4)

It is used as a bone member to be joined to the outer plate in a railway vehicle structure, and is a metal material having a flange portion that can be superimposed on one side of the outer plate,
A metal material, wherein a cross-sectional shape when the flange portion is viewed from a cross-sectional direction of the metal material is curved in a circular shape so as to be convex toward the outer plate side. In the flange portion, the width of the region to be joined as viewed from the cross-sectional direction of the metal material is W, the plate thickness of the metal material is T, and the gap amount allowed between the outer plate and the plate at the time of joining is A of the plate thickness. 2. The metal material according to claim 1, wherein a radius of curvature R of the cross-sectional shape in the flange portion satisfies the following formula (1) when doubled.

The outer plate and the metal material according to claim 1 or 2, wherein the flange portion is overlapped so as to contact one surface side of the outer plate,
A railway vehicle structure, wherein a welded portion is formed along a contact portion between the outer plate and the flange portion.   The railway vehicle structure according to claim 3, wherein the welded portion is a laser welded portion.

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