JP3919682B2 - Friction stir welding method for vehicle, apparatus and friction stir welding structural member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of friction stir welding a joint portion of an outer plate member of a railway vehicle or the like, an apparatus therefor, and a structural member for friction stir welding.
[0002]
[Prior art]
For example, the friction stir welding method is a method in which a tool inserted in a joint portion of a member is moved relative to the member while rotating, the member in a region close to the tool is plastically flowed, and the member is solid-phase joined. is there.
[0003]
In this case, it is important gap between member was I butt coupling. If the gap is excessive, good bonding cannot be achieved. In the joint portion between the side structure and the wife structure as in the body of a railway vehicle, the manufacturing error of the member tends to be large, and the gap is likely to be excessive.
[0004]
In Patent Document 1, provided with a slit and constant gap butting engagement I was part of the two members to be joined, and the friction stir joining and then place the filling material in the gap.
[0005]
[Patent Document 1]
JP2000-233285A (EP1147832A2)
[Patent Document 2]
JP 2002-001444 A (EP11478332A2)
[0006]
[Problems to be solved by the invention]
The present invention provides a method and apparatus for automatically friction stir welding a wife, a side structure and a joint of a railway vehicle, and a structural member suitable for friction stir welding.
[0007]
[Means for Solving the Problems]
The present invention is a friction stir welding of the roof structure, underframe, and side structure of a railway vehicle along the longitudinal direction of the railway vehicle,
Next, the longitudinal end portion of the joint structure is butted against the wife structure, and from the rain gutter at the connection portion between the roof structure or the roof structure and the side structure along the vehicle interior side of the butted portion. A cylindrical gutter member that guides the rainwater downward, and a load receiving member arranged between the left and right gutter members,
From the outside of the vehicle, using the gutter member as a backing metal, friction stir welding the butt portion,
It is characterized by.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing an end portion of a railway vehicle to which the present invention is applied.
The vehicle body denoted as a whole by reference numeral 1 has a side structure 4 and a ridge structure 6 on a frame 2, and a wife structure 8 is joined to an end of the structure via a joint 10. The wife structure 8 closes the end of the vehicle body 1 in the longitudinal direction, and has a pipe passage 9 for going to an adjacent vehicle. The outer peripheral portion of the wife structure 8 is parallel to the side structure 4 and the roof structure 6 and is abutted and joined to these.
[0009]
Inside the butt case it was part (junction) 10 as shown in the sectional view of FIG. 2, the gutter member 20 is disposed. The rain gutter member 20 is columnar, and the hollow internal space 22 guides rain drops falling from the ridge structure 6 or rain drops falling from the rain gutter at the connection part between the roof structure 6 and the side structure 4. is there. The end portions of the side structure 4 and the end structure 8 overlap the surface of the gutter member 20 on the vehicle outer side. The end of the end portion and the end structures 8 of the side structure 4 has been Sera I pick if. The protruding piece 28 of the gutter member 20 is appropriately welded to the inner surface 5 of the hollow extruded shape member of the side structure 4.
[0010]
End structure 8 is made of an aluminum alloy, the side structures 4, has a butt engagement I was part of a roof structure 6. Protrusion 8b is welded with the other to the portion of the end structure or for butt coupling I was part 10 of the end structure 8, press or sequential molding, it is integrally constructed. Sequential molding is shown in Patent Document 2. Butt engagement it was part of the roof structure 6 and the end structure 8 is welded as in the prior art.
The present invention relates to a method for friction stir welding the butted if I was 10 and the side structure 4 and the end structure 8.
[0011]
FIG. 3 is a front view showing an outline of the joining apparatus of the present invention, and FIG. 4 is a side view.
The vehicle body 1 is restrained and supported by a structure support device 40 provided on the surface plate 30. A plurality of load receiving members 50 that receive a load by friction stir welding are attached to the inside of the vehicle.
[0012]
The joining apparatus denoted as a whole by reference numeral 100 has a column 110 standing upright outside the vehicle, and a plurality of horizontal rails 112 provided in the horizontal direction are attached to the column 110. The traveling unit 120 to be guided with respect to the horizontal rail 112 has a linear guide 116 and is supported by the rail 112 via a roller 114 or the like.
The joining unit 130 is supported so as to be movable in the vertical direction with respect to the traveling unit 120.
[0013]
The joining unit 130 includes a slit machining unit 140 and a friction stir welding unit 150.
A filler supply unit 160 is provided between the slit machining unit 140 and the friction stir welding unit 150.
[0014]
FIG. 5 is an explanatory view showing the configuration of the joining unit, and FIG. 6 is a view taken in the direction of arrows in FIG.
Slitting unit 140 provided with a cutting tool 142 for grooving, cutting a gap G ₁ of thrust engagement I was part (junction) 10 between the side structure 4 and end structures 8 a uniform width. As shown in FIG. 6 (b) by the grooving, groove G ₂ having a uniform width is formed.
[0015]
Next, with respect to the groove _{G 2,} inserting the filling material 180 by the filling material supply unit 160. The filler 180 is butted if I was part side structure 4, the end structures 6 and the aluminum alloy of the same material a material which is in a strip, inserted in the groove G _2, for ease of restraint, the cross-sectional shape is T It has a letter shape.
[0016]
The filler supply unit 160 is located between the cutting tool 142 of the slit machining unit and the friction stir welding tool 152 of the friction stir welding unit 150, and supplies the filler 18 from above to below. Although not shown, it is pushed into the groove G ₂ a filler 180 with rollers.
The friction stir welding tool 152 of the friction stir welding unit 150 performs friction stir welding with the inserted filler as a center to form a friction stir welding portion FW.
[0017]
Through the series of steps described above, the joint can be automatically friction stir welded.
In other words, the butted portion lower end toward the upper end from, while cutting the butted portion 10, while inserting the filling material 180 in the groove G _2, is a friction stir welding tool 152 is inserted while rotating movement, the friction stir welding To do.
Further, since the joint portion is cut into a uniform width dimension and the filler 180 is supplied to perform friction stir welding, a reliable and high strength joint portion can be obtained.
[0018]
The end portion of the side structure 4 and the end portion of the end structure 6 are such that the cross section of the gutter member 20 overlaps a flat surface of one side of the quadrangle. When friction stir welding butt engagement I was part, it takes a large load to the portion not I butt case, this load is supported by the gutter member 20,該雨gutter member 20 via the load receiving member 50 other Since the friction stir welding is performed from the left and right sides, the friction stir welding is satisfactorily joined, and the joining portion is not bent and becomes a concave shape, thereby obtaining a good-looking joint portion FW. Can do.
After the friction stir welding, the remaining filler 180 is flattened by cutting.
[0019]
FIG. 7 shows another embodiment of the joining device of the present invention, and FIG. 8 shows a view taken along the arrow EE of FIG.
The slit processing unit 140 includes a slit cutter 142 and a sensor 144 for copying the position of the slit cutter 142 to the center of the joint. Similarly, the friction stir welding unit 150 also includes a sensor 154 for copying the friction stir welding tool 152 to the center of the joint.
[0020]
The supply unit 160 for the filler 180 has feeding rollers 170 and 172 and feeds the filler 180 with the filler 180 sandwiched therebetween.
That is, when the friction stir welding tool 152 is joined in the direction of the arrow S, a thrust for returning the filler 180 indicated by the arrow R to the supply source side acts on the filler 180.
[0021]
Therefore, a configuration is provided in which a driving force is applied to the feeding roller 170 to actively feed the filler 180 to the friction stir welding tool 152 side. That is, the filler 180 is sandwiched between the feed rollers 170 and 172 from above and below.
The presser roll 156 provided immediately before the friction stir welding tool 152 has a function of preventing an action of the filler trying to protrude from the groove by this thrust.
According to the apparatus of this embodiment, more reliable joining can be achieved.
[0022]
FIG. 9 shows an example in which the function of a filler is added to the gutter member 200 applied to the present invention. The surface of the gutter member 200 on the vehicle outer side has a protruding portion 204 corresponding to the filler 180 and a protruding portion 206 overlapping the protruding piece 8b of the end structure 8.
The gutter member 200 having the protrusions 204 and 206 can be provided by an extruded profile.
This thing is not able to cut a groove G _2.
[0023]
A gap between the end of the side structure 4 and the end of the protruding piece 8 b of the end structure 8 and the protruding portion 204 is filled with the top of the protruding portion 204 and the metal of the protruding piece 206. The boundary between the small diameter portion and the large diameter portion of the friction stir welding tool is located in the protrusion 206. After the friction stir welding, the remaining protrusions 204 and 206 are cut.
[0024]
FIG. 10 shows still another example of the structural member.
The gutter member 210 has protrusions 216 and 216b on both sides of the top of the protrusion 214. Since the protrusions 216 and 216b are provided on both sides of the friction stir welding tool, it can be satisfactorily joined.
[0025]
FIG. 11 shows still another example of the gutter member.
The gap between the protrusions 226, 226b and the outer surface of the vehicle is enlarged on the entrance side, facilitating the insertion of the side structure 4 and the end structure 6.
[Brief description of the drawings]
FIG. 1 is a perspective view of a shaft to which the present invention is applied.
FIG. 2 is a sectional view of a shaft to which the present invention is applied.
FIG. 3 is a front view of the joining apparatus of the present invention.
FIG. 4 is a side view of the joining apparatus of the present invention.
FIG. 5 is an explanatory diagram of a joining unit.
6 is an arrow view of FIG. 5;
FIG. 7 is an explanatory view showing another example of the joining device.
8 is a cross-sectional view taken along line EE in FIG.
FIG. 9 is a cross-sectional view showing another example of a structural member.
FIG. 10 is a cross-sectional view showing another example of a structural member.
FIG. 11 is a cross-sectional view showing another example of a structural member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Railcar 4 Side structure 8 Roof structure 10 Joint part 20 Rain gutter member 130 Joint unit 142 Slit cutter 152 Friction stir welding tool 180 Filling material 204,206 Protrusion part

Claims (9)

Join the rail car roof structure, underframe and side structure along the longitudinal direction of the rail car,
Next, the longitudinal end portion of the joint structure is butted against the wife structure, and from the rain gutter at the connection portion between the roof structure or the roof structure and the side structure along the vehicle interior side of the butted portion. A cylindrical gutter member that guides the rainwater downward, the gutter members are arranged on the left and right of the wife structure, and a load receiving member is arranged between the left and right gutter members,
Using the rain gutter member as a backing metal, the abutting portion is friction stir welded from the outside of the vehicle,
A friction stir welding method for vehicles characterized by the above. The friction stir welding method for a vehicle according to claim 1, wherein the butt portion is cut into a slit having a constant width along a vertical direction,
Supplying a linear filler to the slit for friction stir welding,
The friction stir welding of the butt portion including the filler;
A friction stir welding method for vehicles characterized by the above.   The friction stir welding method for a vehicle according to claim 2, wherein the cutting is performed from the lower side toward the upper side, the friction stir welding is performed from the lower side toward the upper side, and the friction stir welding is performed at the lower side. A friction stir welding method for a vehicle, characterized in that the method is carried out from above to above. The friction stir welding method for a vehicle according to claim 1, wherein the gutter member includes a protruding portion that protrudes to the outside of the vehicle, and a tip end portion of the protruding portion is an outside of the end of the wife structure or the bonded structure. A friction stir welding of the butted portion including the protruding portion from the outside of the vehicle,
A friction stir welding method for vehicles characterized by the above. An apparatus for friction stir welding of the abutting portion against a structure in which a longitudinal end portion of a joint structure obtained by joining a roof structure, a frame, and a side structure of a railway vehicle along the longitudinal direction of the railway vehicle is abutted with a wife structure. In
And placing the roof structure or tubular gutter member for guiding the rainwater under the rain gutter at the connection of the roof structure and the side structure along the vertical direction on the interior side of the butt portion,該雨The eaves member is arranged on the left and right of the wife structure, and the load receiving member is arranged between the left and right gutter members,
The apparatus includes a slit processing unit that cuts the butt portion into a slit having a constant width along a vertical direction, a filler supply unit that supplies a filler for friction stir welding to the slit, and the filler. A friction stir welding unit that friction stir welds the abutting portion, the friction stir welding unit being friction stir welded from the outside of the vehicle with the gutter member as a backing metal;
A friction stir welding apparatus for vehicles. A structural member disposed in the gap between the butted portions having a gap and having a closed cross section, provided outside the closed cross section and passing through the butted portion to be joined outside Having a portion that overlaps the
A structural member for friction stir welding characterized by the above. The structural member for friction stir welding according to claim 6, wherein the overlapping portion has a cross-sectional shape overlapping one outer side of the members to be joined,
A structural member for friction stir welding characterized by the above. The structural member for friction stir welding according to claim 6, wherein the protrusion has a cross-sectional shape that overlaps both outer sides of the members to be joined,
A structural member for friction stir welding characterized by the above. A gutter member which is arranged at the end of the side structure body length side direction, has a planar overlapping ends of the end and end structures of the side structure to the outer surface of the closed section and further, the side structure Including a protruding portion that overlaps the outside of the member to be joined by passing through the butted portion of the end and the end of the wife structure,
A structural member for friction stir welding characterized by the above.

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