JP4620033B2 - Railway vehicle structure and frame member mounting method - Google Patents

Description

  The present invention relates to a railway vehicle structure in which a frame member of an opening such as an entrance is joined to a side structure by friction stir welding, and more particularly to a railway vehicle structure in which the weight of the joint is reduced.

Japanese Unexamined Patent Application Publication No. 2002-153982 relates to a railway vehicle structure in which a frame member is friction stir welded to an opening. FIG. 4 is a perspective view of the vehicle body of the railway vehicle. 5 is a cross-sectional view taken along the line MM of the opening shown in FIG. 4 and shows a friction stir welding state.
The railway vehicle structure 100 includes a side structure 101 that constitutes a side surface, a roof structure 102 that constitutes a roof, a frame 103 that constitutes a floor, and a wife structure 104 that constitutes an end portion in the longitudinal direction. The side structure 101, the roof structure 102, the frame 103, and the like are each configured by joining a plurality of extruded hollow members 110. The extruded hollow profile 110 has an extrusion direction (longitudinal direction) that is the longitudinal direction of the vehicle body 100, and the side structure 101 and the like have a plurality of extruded hollow profiles 110 joined in the width direction.

The railway vehicle structure 100 has a plurality of windows 121 and an entrance / exit 122, and an opening for that purpose is formed in the side structure 101. Therefore, for example, a frame member 125 is joined to the opening edge of the entrance 122. The frame member 125 has a cross-sectional shape as shown in FIG. 5 and is a high-strength member having a large thickness.
By the way, although not shown in detail, the extruded hollow member 110 is a double skin panel made of an aluminum alloy in which two plates are connected by an intermediate rib. On the other hand, the frame member 125 is also an extruded shape made of an aluminum alloy and having a shape shown in the figure, and is bent into a U shape excluding the bottom of the doorway 122.

  In the extruded hollow member 110, a substantially parallel upper surface plate 111 and lower surface plate 112 are connected by a rib 113 which is a plurality of connection plates. In the joint portion shown in FIG. 5, the end portion of the upper surface plate 111 on the vehicle outer side protrudes toward the opening side from the end portions of the lower surface plate 112 and the rib 113 on the vehicle inner side. The frame member 125 is formed with a convex portion 126 that protrudes outward from the upper surface plate 111, a protruding portion 127 that overlaps the inner surface of the upper surface plate 111, and a protruding portion 128 that overlaps the inner surface of the lower surface plate 112. ing.

The extrusion drawing the lower side of the hollow shape member 110 and the frame member 125 is supported to the gantry, the abutting portion of the upper surface plate 111 and the projection 126 is friction stir welding from above. In the friction stir welding, the probe-type rotary tool 150 is inserted by pressing the probe 151 into the butted joint from above. The rotating tool 150 is pressed until a part of the large-diameter rotating body 152 enters the convex portion 126. In the friction stir welding, the rotary tool 150 is inserted into the joint portion as shown in the figure while rotating and moves in a direction penetrating the drawing. After the friction stir welding, the convex portions 126 and the joints above the outer surface of the upper surface plate 111 are cut with a grinder. On the other hand, the protruding portion 128 on the opposite side and the lower surface plate 112 are joined by fillet welding.
JP 2002-153982 A

However, when the frame member such as the doorway is joined by the conventional method as shown in FIG. 5, the weight of the whole structure is increased by the increase in the weight of the frame structure. When the frame member 125 is friction stir welded to the extruded hollow shape member 110 with the probe-type rotary tool 150 as shown in FIG. 5, the probe 151 is pushed into the joint, so that the rigidity enough to receive the pressing force is the frame member. This is because it is necessary for 125. Therefore, the conventional structure for a railway vehicle has a problem in that the weight of the frame member of the opening is increased because the frame member of the opening portion has sufficient rigidity to increase the weight.

  Therefore, an object of the present invention is to provide a railway vehicle structure and a frame member mounting method in which the weight of the frame member in the opening is reduced in order to solve the above-described problem.

  The structure for a railway vehicle of the present invention has a side structure, a roof structure, a wife structure, and a frame, and a frame member is attached to an entrance and an opening of a window formed in the side structure and the wife structure. The frame member is formed with a joint protrusion protruding in a direction along the outer surface of the vehicle body in the attached state, and a protrusion portion is formed on the opening side in a direction along the outer surface of the vehicle body. It is characterized in that the joint end faces with the projection part on the opening side are butted together and friction stir welding is carried out while sandwiching the joined parts between the joint end faces with a bobbin tool type rotary tool.

In the railcar structure according to the present invention, the frame member has a joint projection formed on the inner surface side of the vehicle body, and the joint projection portion on the inner surface side of the vehicle body and the joint end surface are formed on the opening side. It is preferable that friction stir welding is performed while sandwiching the joint portion where the joint end surfaces are butted together by a bobbin tool type rotary tool.
In the railcar structure according to the present invention, the frame member has a joint projection formed on the inner surface of the vehicle body, the joint projection is superimposed on the inner wall of the vehicle body of the opening , and a fillet is formed at the end of the joint projection. It is preferably welded.

In the railway vehicle structure of the present invention, the side structure is formed of an extruded hollow member having a structure in which an upper surface plate and a lower surface plate are connected to each other by a plurality of ribs, and an entrance / exit opening formed in the side structure. A substantially U-shaped frame member is attached to the portion, and the frame member has a cross-sectional view in the longitudinal direction with the same thickness as the upper surface plate and the lower surface plate, and protruding projections with the same interval protruding. The end face of the joint projection is abutted against the upper surface plate and the lower surface plate, and the abutted joint portion is friction stir welded by a bobbin tool type rotary tool. Preferably there is.
In the railway vehicle structure of the present invention, the side structure is formed of an extruded hollow member having a structure in which an upper surface plate and a lower surface plate are connected to each other by a plurality of ribs, and an entrance / exit opening formed in the side structure. The substantially U-shaped frame member is attached to the part, and the frame member has a substantially U-shape in which a joining protrusion having a different length protrudes from a cross section seen in the longitudinal direction. On the vehicle body outer surface side, the end surface of the joint protrusion is abutted against the upper plate, and the abutted joint portion is friction stir welded by a bobbin tool type rotary tool, and on the vehicle body inner surface side, the joint projection is It is preferable that it is superimposed on the face plate and is fillet welded at the end of the joint projection.

The frame member mounting method according to the present invention relates to a railway vehicle structure including a side structure, a roof structure, a wife structure, and a base frame, and attaches the frame member to an entrance and an opening of a window formed in the side structure and the wife structure. In the method, the frame member is formed with a joint protrusion protruding in a direction along the outer surface of the vehicle body in the attached state, and a protrusion portion is formed on the opening side in the direction along the outer surface of the vehicle body. The joint end surfaces of the joint projection and the projection portion on the opening side are butted together, and the joint portion where the joint end surfaces are butted together is friction stir welded while being sandwiched by a bobbin tool type rotary tool. To do.

In the frame member mounting method of the present invention, a joining projection is also formed on the inner surface side of the frame member, and the joining projection portion on the inner surface side of the vehicle body and the joining end surface are abutted with each other. In addition, it is preferable to perform friction stir welding while sandwiching the joining portion where the joining end surfaces are butted together by a bobbin tool type rotary tool.
In the frame member mounting method of the present invention, a joining projection is formed also on the inner surface of the frame member on the vehicle body, the joining projection is superimposed on the inner wall of the vehicle body of the opening , and fillet welding is performed at the end of the joining projection. It is preferable that

  Therefore, according to the present invention, by using the bobbin tool type rotary tool, it is not necessary to receive a load at the time of joining, the cross-sectional area of the frame member can be reduced, and the structure for a railway vehicle can be reduced by reducing the thickness. Will contribute to weight reduction.

Next, an embodiment of a railcar structure and a frame member mounting method according to the present invention will be described below with reference to the drawings.
Since the appearance of the railcar structure of the present embodiment is the same as the conventional one, the railcar structure 100 of FIG. 4 will be described as an example. Therefore, the railway vehicle structure 100 of the present embodiment also includes a side structure 101 that constitutes a side surface, a roof structure 102 that constitutes a roof, a frame 103 that constitutes a floor, and a wife structure 104 that constitutes an end portion in the longitudinal direction. It is configured. The side structure 101, the roof structure 102, the frame 103, and the like are each configured by joining a plurality of extruded hollow members 110.

  The plurality of extruded hollow members 110 are joined together by, for example, friction stir welding. Here, FIG. 3 is an example of the extruded hollow member 110, and is a view showing the joining of the extruded hollow members. The extruded hollow members 110A and 110B, which are members to be joined, have an upper surface plate 111 and a lower surface plate 112 connected by a plurality of inclined ribs 113, and vertical end ribs 114 are provided at the joining end portions. From the end rib 114, the upper surface plate 111 and the lower surface plate 112 protrude in the planar direction. At the time of joining, the extruded hollow shapes 110 </ b> A and 110 </ b> B are joined by the rotary tool 1 with the joining end surfaces of the upper surface plate 111 and the lower surface plate 112 abutting each other as illustrated.

In this embodiment, the extruded hollow profile members 110 </ b> A and 110 </ b> B are friction stir welded using the bobbin tool type rotary tool 1. The bobbin tool type rotary tool 1 includes an upper rotating body 2 and a lower rotating body 3 that sandwich an upper surface plate 111 and a lower surface plate 112, and a probe 4 that is a stirring shaft between them. In the rotating tool 1 to which the rotation is given, the probe 4 is sent along the joint, and the surrounding material is plastically fluidized by mechanical stirring. The upper rotating body 2 and the lower rotating body 3 sandwich the upper surface plate 111 and the lower surface plate 112 from above and below to prevent the material from being lost from the plastic zone.

  The softened material flows behind the probe 4 that is plastically fluidized and moves, and the plastic materials mixed with each other lose frictional heat and rapidly cool and solidify to complete the joining. The extruded hollow members 110A and 110B are reversed after the upper surface plates 111 are joined to each other, and the lower surface plates 112 are joined in the same manner. In the railway vehicle structure constituted by the extruded hollow member 110, the upper surface plate 111 side is the vehicle body outer surface side.

The extruded hollow member 110 has an extrusion direction (longitudinal direction) which is the longitudinal direction of the vehicle body 100, and ends in the width direction are friction stir welded as illustrated. The side structure 101 is formed with openings of windows 121 and inlets / outlets 122, which are formed by cutting the extruded hollow member 110 into a predetermined shape before joining, or by cutting after joining. Is done. The frame member 10 is attached to the doorway 122. The extruded hollow member 110 is a double skin panel made of an aluminum alloy as described above, and the frame member 10 of the present embodiment is also an extruded member made of an aluminum alloy, and is U-shaped excluding the bottom of the doorway 122. It is bent and attached to the shape.

  Here, FIG. 1 is a cross-sectional view showing a joint portion between the extruded hollow member 110 and the frame member 10. In this embodiment, it is integrated by friction stir welding as in the prior art, but in particular, the bobbin tool type rotary tool 1 is used. Therefore, a joint joint for joining with the bobbin tool type rotary tool 1 is formed on the extruded hollow member 110 and the frame member 10. 1 shows, for example, the NN cross section of the extruded hollow member 110 shown in FIG. 3, and is cut along the longitudinal direction of the railway vehicle structure 100 (extruded hollow member 110). (Refer to the MM cross section in FIG. 4).

  Therefore, the joint joint for joining the frame members is specifically configured as follows. That is, the edge shape of the opening of the railway vehicle structure is formed at a position where the tips of the upper surface plate 111 and the lower surface plate 112 of the extruded hollow member 110 protrude and the rib 113 retracts inward. On the other hand, the frame member 10 has a U-shaped cross-sectional shape as shown in the figure, and joint protrusions 11 and 12 are projected in parallel from the thick portion. These joining protrusions 11 and 12 are formed at the same interval and the same thickness as the upper surface plate 111 and the lower surface plate 112 of the extruded hollow member 110. Then, the upper surface plate 111 and the lower surface plate 112 of the extruded hollow shape member 110 and the bonding protrusions 11 and 12 are arranged so that the front end surfaces thereof abut each other.

As shown in the drawing, the rotating tool 1 sandwiches the joined projection 11 and the upper surface plate 111 between the upper rotating body 2 and the lower rotating body 3, and the probe 4 is fed along the joining portion while rotating. The upper rotating body 2 and the lower rotating body 3 prevent the material from being lost from the plastic zone by sandwiching the bonding protrusion 11 and the upper surface plate 111 from above and below. As a result, at the joint between the joint protrusion 11 and the upper surface plate 111, the surrounding material is plastically fluidized by mechanical stirring, and the softened material flows behind the moving probe 4, and the mixed plastic material generates frictional heat. Lost and rapidly solidifies by cooling and completes the joining. The rotary tool 1 moves along the shape of the frame member 10 formed in a U shape excluding the bottom of the doorway 122, and the frame member 10 is attached to the side structure 101. After joining on the upper surface plate 111 side, the joining projection 12 on the opposite side and the lower surface plate 112 are joined in the same manner.

Therefore, in the frame member attaching method of the present embodiment, by using the bobbin tool type rotary tool 1, it is not necessary to receive a load at the time of joining, and the cross-sectional area of the frame member 10 can be reduced. That is, since it is not necessary to ensure the strength to receive the load applied during the joining, and the frame structure only needs to be the minimum necessary considering the structural strength, the frame member 10 having a U-shaped cross section has its meat. It was possible to reduce the thickness and reduce the weight, which led to a reduction in the weight of the railway vehicle structure. In addition, in the friction stir welding, since welding beads cannot be performed as in arc welding or the like, the appearance of the vehicle body outer surface of the railway vehicle structure 100 can be improved. Even the cost reduction by reducing man-hours finishing such as machined after bonding the frame member 10 becomes unnecessary.

  Next, FIG. 2 is a cross-sectional view showing a joint portion when another frame member 20 is attached to the extruded hollow member 110. In this embodiment, one side is friction stir welded by the bobbin tool type rotary tool 1, and the other is joined by MIG welding. Therefore, a joined joint for the joining is formed on the extruded hollow member 110 and the frame member 20. 2 is, for example, the MM cross section of FIG. 4 and is cut along the longitudinal direction of the railway vehicle structure 100 (extruded hollow member 110). is there.

  As for the structure of the joint joint, in the extruded hollow shape member 110, only the upper surface plate 111 protrudes from the tip, and the lower surface plate 112 and the rib 113 are formed shorter than that. On the other hand, the frame member 20 has a U-shaped cross-sectional shape as shown in the figure. The joint protrusions 21 and 22 are projected in parallel from the thick portion, and the joint protrusion 22 on the lower surface plate 112 side to be MIG welded is provided. It is formed long. In the present embodiment, the front end surfaces of the bonding projection 21 and the upper surface plate 111 are abutted with each other, but the other bonding projection 22 is overlapped with the lower surface plate 112.

As shown in the drawing, the rotating tool 1 sandwiches the joined joint protrusion 21 and the upper surface plate 111 between the upper rotating body 2 and the lower rotating body 3, and the probe 4 is fed along the joining portion while rotating. Accordingly, the surrounding material is plastically fluidized by mechanical agitation, and the softened material flows behind the moving probe 4, and the mixed plastic material loses frictional heat and rapidly cools and solidifies to complete the joining. The rotary tool 1 moves along the shape of the frame member 20 formed in a U shape excluding the bottom of the doorway 122, and the frame member 20 is attached to the side structure 101. Further, on the opposite lower surface plate 112 side, the bonding projection 22 is superimposed on the lower surface plate 112, and a step is generated on the surface. Therefore, fillet welding by MIG welding is performed along the shape of the frame member 20 formed in a U shape at the stepped portion.

Therefore, in the frame member attaching method of the present embodiment, by using the bobbin tool type rotary tool 1, it is not necessary to receive a load at the time of joining, and the cross-sectional area of the frame member 20 can be reduced. That is, since the frame structure may be a minimum necessary considering the structural strength, the thickness of the frame member 10 can be reduced and the weight can be reduced. As a result, the structure for a rail vehicle can be reduced in weight. It was. Since the outer surface side of the vehicle body is friction stir welded, welding beading is not possible as in arc welding, so the appearance of the outer surface of the railway vehicle structure 100 can be improved. Even the cost reduction by reducing man-hours finishing such as machined after bonding the frame member 20 becomes unnecessary. On the other hand, since the opposite side where finishing is not required is MIG welding, the working time can be shortened compared to friction stir welding.

As mentioned above, although embodiment was described about the structure for rail vehicles and the frame member attachment method concerning this invention, this invention is not limited to these, A various change is possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the railway vehicle structure constituted by the extruded hollow shape member is shown, but it may be constituted by a member other than the extruded hollow shape material.

It is sectional drawing which showed 1st Embodiment of the junction part of an extrusion hollow shape material and a frame member. It is sectional drawing which showed 2nd Embodiment of the junction part of an extrusion hollow shape material and a frame member. It is an example of an extruded hollow profile, and is a diagram showing the joining of the extruded hollow profiles. It is a perspective view of the vehicle body of a railway vehicle. It is MM sectional drawing of the opening part shown in FIG. 4, Comprising: The friction stir welding state is shown.

DESCRIPTION OF SYMBOLS 1 Rotating tool 2 Upper rotating body 3 Lower rotating body 4 Probe 10 Frame members 11 and 12 Joining protrusion 110 Extrusion hollow profile 111 Upper surface plate 112 Lower surface plate 113 Rib 121 Window 122 Entrance / exit

Claims (8)

In a railway vehicle structure having a side structure, a roof structure, a wife structure, and a base frame, and a frame member attached to an entrance and an opening of a window formed in the side structure and the wife structure,
The frame member is formed with a joint protrusion protruding in a direction along the outer surface of the vehicle body in the mounted state, and a protrusion portion is formed on the opening side in a direction along the outer surface of the vehicle body. The joint protrusion of the frame member and the opening A railway vehicle characterized in that the joint end faces with the projection part on the part side are abutted, and the joint part where the joint end faces are abutted is friction stir welded while being sandwiched by a bobbin tool type rotary tool. Structure for use. The structure for a railway vehicle according to claim 1,
The frame member has a bonding projection formed also on the inner surface of the vehicle body, the bonding projection is formed by abutting the bonding projection portion of the inner surface of the vehicle body formed on the opening side and the bonding end surfaces, and bonding the bonding end surfaces. A railway vehicle structure characterized in that the part is friction stir welded while being pinched by a bobbin tool type rotary tool. The structure for a railway vehicle according to claim 1,
The frame member is formed by forming a joint projection on the inner surface of the vehicle body, the joint projection being superimposed on the vehicle body inner wall of the opening, and being fillet welded at the end of the joint projection. Railway vehicle structure. The structure for a railway vehicle according to claim 1,
The side structure is constituted by an extruded hollow member having a structure in which an upper surface plate and a lower surface plate are connected by a plurality of ribs, and the substantially U-shaped frame with respect to an opening of an entrance / exit formed in the side structure. The member is attached,
The frame member has a substantially U-shaped cross-section as viewed in the longitudinal direction, and has the same thickness as the upper surface plate and the lower surface plate, and protruded with the same interval, and the end surface of the joint protrusion is the same as the upper surface plate. A railway vehicle structure characterized in that it is abutted against a lower surface plate, and the abutted joining portion is friction stir welded by a bobbin tool type rotary tool. The structure for a railway vehicle according to claim 1,
The side structure is constituted by an extruded hollow member having a structure in which an upper surface plate and a lower surface plate are connected by a plurality of ribs, and the substantially U-shaped frame with respect to an opening of an entrance / exit formed in the side structure. The member is attached,
The frame member has a substantially U-shape in which a joining projection having a different length in a cross section seen in the longitudinal direction is projected, and on the vehicle body outer surface side, an end surface of the joining projection is abutted against the upper surface plate, The abutted joint part is friction stir welded by a bobbin tool type rotary tool, and on the inner surface side of the vehicle body, the joint projection is superimposed on the lower surface plate, and fillet welded at the end of the joint projection. A structure for a railway vehicle characterized by being. With regard to the structure for a railway vehicle composed of a side structure, a roof structure, a wife structure, and a frame , in a method for attaching a frame member to an entrance and an opening of a window formed in the side structure and the wife structure,
The frame member is formed with a joint protrusion protruding in a direction along the outer surface of the vehicle body in the attached state, and a protrusion portion is formed on the opening side in a direction along the outer surface of the vehicle body. The joint protrusion of the frame member and the opening A method of attaching a frame member, characterized in that joint end surfaces with a projection portion on the part side are butted together and friction stir welding is performed while sandwiching the joined portions between the joint end surfaces with a bobbin tool type rotary tool. In the frame member attachment method according to claim 6,
A joining projection is formed on the inner surface of the frame member on the inner surface of the frame member, the joining projection portion formed on the opening side of the frame is abutted against the joining projection portion on the inner surface of the vehicle body, and the joining end surfaces are joined together. A method of attaching a frame member, characterized in that friction stir welding is performed while being sandwiched by a bobbin tool type rotary tool. In the frame member attachment method according to claim 6,
Also forms a junction protrusion on the vehicle body inner side of the frame member, the bonding projections superposed on the vehicle body inner surface wall of the opening, the frame member mounting method characterized by the fillet weld at joint protruding end.

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