JP2013107113A - Panel joined body, method for producing the panel joined body and vehicle provided with panel joined body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel joined body in which deformation caused by strain on joining can be reduced with a simple constitution, and further, even if deformation is caused, the deformation can be simply straightened, a method for producing the panel joined body, and a vehicle provided with the panel joined body.SOLUTION: The panel joined body 20 is composed in such a manner that a connection part is provided between the edge parts 12a and 12a of a plurality of panels 10 which are arranged side by side Tto be connected. The connection part is formed in such a manner that the respective second main plates 12 and 12 of the plurality of panels 10 are joined with the respectively corresponding side edges 30a of connection plate members 30 which are arranged between the respective panels 10, and the connection plate members 30 are provided so as to be mutually separated to directions along the edge parts 12a of the second main plates 12 in two or more pieces.

Description

  The present invention relates to a panel assembly, a method for manufacturing a panel assembly, and a vehicle including the panel assembly.

  Conventionally, a vehicle body frame such as a railway vehicle is manufactured by joining a roof structure, side structures facing each other, and a floor structure. Each structure of the roof structure, the side structure, and the floor structure constituting the body frame is formed by joining a plurality of long hollow panels generally called double skins in the short direction of the panel.

Patent Document 1 describes a hollow structure mold and a structure formed by joining the hollow structure mold.
The hollow structure mold described in Patent Document 1 is formed by two opposing plates and a plurality of rib plates that connect and support the two plates. One of the two opposing plates has a shorter tip than the other plate, and a joint plate is disposed between one plate of adjacent hollow structure molds. The structure is formed by joining the other plates of the two hollow structural molds and then joining the joint plate and the one plate.

JP 2004-243379 A

However, the structure and the manufacturing method of the structure of Patent Document 1 have the following problems.
In the technique described in Patent Document 1, in the process of joining one plate of a hollow structure mold material, which is a panel constituting a joined body, and a joint plate, expansion due to heat during welding, and the joint is cooled and hardened after melting. Due to the shrinkage, welding distortion occurs between the hollow structure molds to be joined. For this reason, there is a possibility that deformation such as bending occurs on the surface of the structure formed by joining the hollow structural molds, and it cannot be formed into a desired shape. Further, the deformation of the surface of the structure is not preferable from an aesthetic point of view.

  For this reason, it is conceivable to correct the deformation of the structure by heating the bent structure and removing the distortion, but the correction process is complicated. Furthermore, in order to eliminate the aesthetic problem caused by the deformation of the surface of the structure, it is conceivable to perform polishing and coating after applying a resin material to the surface of the structure. However, in recent years, there is a desire to delete the coating process performed after the straightening process of the hollow structure mold material from the viewpoint of environmental measures and cost reduction in the manufacturing process. In particular, since the vehicle body of a transportation system vehicle is a large structure, it takes time to correct the deformation that occurs, and the amount of paint required for painting is large. For this reason, reduction of the deformation itself of the structure caused by welding distortion is particularly desired.

  Therefore, the present invention can reduce deformation due to distortion at the time of joining with a simple structure, and can easily correct the deformation even if deformation occurs, a method for manufacturing the panel joined body, and the panel joined body An object is to provide a vehicle equipped with

  In order to solve the above-described problem, the panel assembly of the present invention is a panel assembly configured by connecting and connecting a plurality of panels arranged side by side with a connection portion, The connecting portion is formed by joining each of the plurality of panels to a corresponding side edge of the connecting plate member disposed between the panels, and the connecting plate members are separated from each other in a direction along the edge portion. It is characterized by being provided in plurality.

According to the present invention, the joint between the panel and each connecting plate member is formed discontinuously along the edge of the panel. Thereby, even if distortion occurs when the panels are joined by welding or the like, the stress due to the distortion is interrupted and can be dispersed to each connecting plate member. Furthermore, the distortion can be absorbed by elastically deforming a plurality of connecting plate members. Therefore, when the panel joined body is formed, it is possible to reliably reduce the deformation caused by the strain at the time of joining.
In addition, by providing the connecting plate members discontinuously in the direction along the edge of the panel, the yield load for the compressive load or tensile load acting on the cross section along the edge of the connecting portion due to the bending moment (hereinafter referred to as “bending yield load”). Is set smaller than the panel. Therefore, even if the panel assembly is deformed due to strain at the time of joining, it is easy to bend the connecting plate member only with a small bending yield load and plastically deform the connecting plate member. Deformation can be corrected.

  Further, the panel includes a first main plate and a second main plate facing each other, and a rib connecting the first main plate and the second main plate, and the connecting portion includes the adjacent first main plates that are adjacent to each other. In addition to being joined, each of the second main plates is formed by being joined to a corresponding side edge of each of the plurality of connecting plate members.

  According to the present invention, the present invention can also be applied when a so-called double skin panel having two opposing main plates is joined. As a result, even when distortion occurs when the double-skin panels are joined by welding or the like, the distortion can be absorbed in the same manner as described above, and deformation due to distortion during joining can be reliably reduced. Even if the double-skin panel assembly is deformed due to distortion during joining, it can be easily deformed by bending only the connecting portion having a small bending yield load, as described above. It can be corrected. In this manner, deformation due to distortion at the time of joining can be reduced, and even when deformation occurs, the deformation can be easily corrected, and a panel joined body having excellent strength can be formed by the double skin panel.

  Further, the connecting plate member is characterized in that an end surface facing in a direction along the edge portion is formed to be curved inwardly of the connecting plate member.

  ADVANTAGE OF THE INVENTION According to this invention, the boundary of the edge part of a panel and the end surface of a connection board member can be connected smoothly. Further, by forming the end surface of the connecting plate member in a curved manner, it is possible to ensure a larger surface area than when it is formed flat. Therefore, stress generated at the boundary between the edge of the panel and the end face of the connecting plate member can be dispersed, and local stress concentration can be prevented, so that a panel joined body having excellent strength can be formed.

  Further, a welded portion is formed so as to straddle an edge of the panel and a side edge of each of the connecting plate members, and the welded portion is divided at an end of the welded portion along the edge. An opening is formed.

Generally, it is known that welding defects are likely to occur at the welding start portion and the welding end portion. According to the present invention, it is possible to remove a welding defect in which stress is easily concentrated by forming an opening for dividing the welded portion at the end of the welded portion corresponding to the welding start portion and the welding end portion. Therefore, the strength of the welded portion between the panel and the side edge of each connecting plate member can be improved.
In addition, by forming an opening in a substantially circular shape at the end of the welded portion, the connection shape between the end of the welded portion and the edge of the panel and the side edge of each connecting plate member is smoothly formed in an arc shape. The Therefore, even if a bending moment is generated in the panel joined body, it is possible to prevent stress from concentrating on the boundary between the welded portion, the panel, and each connecting plate member, and it is possible to form a panel joined body having excellent strength.
Furthermore, by forming the opening, the cross-sectional area around the opening of the welded portion becomes smaller than when the opening is not formed. Deformation caused by can be easily corrected. Therefore, even if the panel assembly is deformed due to strain at the time of joining, it can be easily obtained by plastically deforming the periphery of the opening by bending only the connecting portion having a small bending yield load. Can correct deformation.

  Moreover, the manufacturing method of the panel joined body of this invention is a manufacturing method of the panel joined body comprised by having a connection part between the edge parts of the several panel arrange | positioned alongside, A welding step of welding each of the plurality of panels and corresponding side edges of the plurality of connecting plate members provided apart from each other in the direction along the edge, and a welded portion formed in the welding step An opening forming step for forming an opening at the end in the direction along the edge so as to divide the welded portion, and the deformation of the panel assembly is corrected after the welding step and the opening forming step. And a straightening process.

According to the present invention, since the welding process of welding each of the plurality of panels and the corresponding side edges of the plurality of connecting plate members is provided, the welded portion between the panel and the connecting plate member is formed discontinuously. it can. Thereby, even if a distortion | strain generate | occur | produces when joining a panel in a welding process, the stress resulting from a distortion interrupts and can be disperse | distributed to each connection board member. Further, in the welding process, the distortion can be absorbed by the plurality of connecting plate members elastically deformed. Therefore, when a panel joined body is formed, deformation due to welding distortion can be reliably reduced.
Moreover, since it has an opening part formation process, the welding defect in which stress tends to concentrate can be removed. Therefore, the strength of the welded portion between the panel and the side edge of each connecting plate member can be improved.
In addition, since a straightening process is provided, even if the panel assembly is deformed due to welding distortion, the connecting plate member is plasticized by bending only the connecting portion having a small bending yield load. Deformation can be easily corrected. In particular, since the correction step is provided after the opening forming step, the deformation caused by the welding distortion can be easily corrected by plastically deforming the periphery of the opening of the welded portion. Therefore, even if the panel assembly is deformed due to welding distortion, it can be easily deformed by plastically deforming the periphery of the opening, for example, by bending only the connecting portion with a small bending yield load. Can be corrected.

  In addition, the vehicle of the present invention is characterized by including a vehicle body frame formed of the panel assembly described above.

  According to the present invention, since the vehicle body frame formed of the above-described panel assembly is provided, a vehicle with high accuracy and low cost can be manufactured.

  According to the present invention, it is possible to reduce deformation due to distortion at the time of joining with a simple structure, and it is possible to easily correct deformation even if deformation occurs.

It is a section perspective view of a transportation system vehicle provided with the panel joined object of an embodiment. It is sectional drawing of the panel of embodiment. It is sectional drawing of the panel assembly of embodiment. It is A arrow directional view in FIG. FIG. 5 is an enlarged view of a region S in FIG. 4. It is explanatory drawing of the manufacturing process of a panel joined body. It is explanatory drawing of a 1st welding process. It is explanatory drawing of a 2nd welding process. It is explanatory drawing of a correction process.

Hereinafter, the panel assembly 20 of the embodiment will be described.
FIG. 1 is a perspective sectional view of a traffic system vehicle 1.
As shown in FIG. 1, the traffic system vehicle 1 includes a vehicle body frame 5 including, for example, a roof structure 2, a plurality of pairs of side structures 3 facing each other, and a floor structure 4.
Each of the roof structure 2, the side structure 3, and the floor structure 4 is formed by a panel joined body 20 in which a plurality of long panels 10 are joined in the lateral direction of the panel 10.

(panel)
FIG. 2 is a cross-sectional view of the panel 10.
As shown in FIG. 2, the panel 10 is a long plate-like member having a longitudinal direction in the front and back direction of the paper and a short direction in the left-right direction in FIG. The panel 10 is formed by extruding a metal such as aluminum or an aluminum alloy, for example.
The panel 10 includes a first main plate 11 and a second main plate 12 that face each other, and a plurality of ribs (a central rib 15 and a pair of side ribs 16 and 16) that connect the first main plate 11 and the second main plate 12. It has a so-called double skin structure.

  The first main plate 11 disposed on one side (the upper side in FIG. 2) and the second main plate disposed on the other side (the lower side in FIG. 2) are both formed in a substantially rectangular plate shape, and are longitudinal. Are formed to have the same length. The width of the first main plate 11 in the short direction is formed wider than the width of the second main plate 12 in the short direction. The 1st main board 11 and the 2nd main board 12 are arrange | positioned substantially parallel in the state spaced apart only predetermined distance.

The central rib 15 and the pair of side ribs 16 and 16 are formed to have the same length in the longitudinal direction as the first main plate 11 and the second main plate 12.
The central rib 15 connects the first main plate 11 and the second main plate 12 at the approximate center in the short direction of the first main plate 11 and the second main plate 12.
The central rib 15 is disposed substantially perpendicular to the first main plate 11 and the second main plate 12. The one end 15a and the other end 15b of the central rib 15 are formed to be slightly thicker than the other portions of the central rib 15. Thereby, the intensity | strength of the connection part of the center rib 15 and the 1st main board 11 and the 2nd main board 12 is ensured.

The pair of side ribs 16, 16 connect the first main plate 11 and the second main plate 12 on both sides of the central rib 15. One side (upper side in FIG. 2) end 16 a of the side rib 16 is connected to the inner side of the edge 11 a in the short direction of the first main plate 11. Further, the other side (lower side in FIG. 2) end 16 b of the side rib 16 is connected to the edge 12 a in the short direction of the second main plate 12.
The pair of side ribs 16, 16 are arranged so as to be inclined away from the central rib 15 from the other side to one side (from the lower side to the upper side in FIG. 2). The one end 16a and the other end 16b of the side rib 16 are formed to be slightly thicker than the other portions of the side rib 16, and the side rib 16, the first main plate 11, and the second main plate 12 are formed. The strength of the connecting part is secured.

  On the other side (lower side in FIG. 2) of the connection portion between the pair of side ribs 16, 16 and the second main plate 12, a step recessed by one step on the one side (upper side in FIG. 2) from the outer surface of the second main plate 12. Portions 18 and 18 are formed. Side edges 30a, 30a in the short direction of the connecting plate member 30 described later are disposed on the step surfaces 18a, 18a of the step portions 18, 18.

(Panel assembly)
FIG. 3 is a cross-sectional view of the panel assembly 20 of the embodiment.
As shown in FIG. 3, the panel joined body 20 is formed by arranging a plurality of panels 10 in the short direction of the panel 10 and joining adjacent panels 10 and 10 together by welding.
Specifically, one side (upper side in FIG. 3) of the adjacent panels 10 and 10 is in a state where the edges 11a and 11a of the first main plates 11 and 11 of the first main plates 11 and 11 are attached together. For example, it joins by welding methods, such as friction stir welding. Thereby, the 1st welding part 7 (refer FIG. 3) is formed in the boundary of the 1st main plates 11 and 11. FIG.

  Further, on the other side (lower side in FIG. 3) of the adjacent panels 10, 10, a plurality of connecting plate members 30 are disposed between the second main plates 12, 12 along the longitudinal direction. Then, the side edges 30a, 30a of each connecting plate member 30 and the step portions 18, 18 formed on the edges 12a, 12a of the second main plates 12, 12 are, for example, TIG (Tungsten Inert Gas) welding or MIG ( It joins by welding methods, such as Metal Inert Gas) welding. Thereby, the some 2nd welding part 8 (refer FIG. 4) discontinuous to a longitudinal direction is formed in the boundary of the 2nd main board 12 and each connection board member 30. FIG.

  In the above, the first main plates 11 are joined by friction stir welding, and the second main plate 12 and the connecting plate member 30 are welded and joined by TIG welding, MIG welding, or the like. These may be combined, both may be performed by the same welding method, or other welding methods other than the above examples may be applied.

(Connecting plate member)
4 is a view taken in the direction of arrow A in FIG.
As shown in FIG. 4, the connecting plate member 30 is a flat plate member formed in a substantially rectangular shape. The connecting plate member 30 has both end surfaces 31 and 31 facing in the direction along the longitudinal direction of the panel 10 and are curved inwardly with a predetermined radius of curvature. The plate thickness of the connecting plate member 30 is formed substantially the same as the plate thickness of the first main plate 11 (see FIG. 3) and the second main plate 12. The side edges 30a and 30a of the connecting plate member 30 can contact the step surfaces 18a and 18a.
A plurality of connecting plate members 30 formed in this manner are provided between the second main plates 12 and 12 so as to be separated from each other in the direction along the longitudinal direction of the panel 10.

(Second weld)
FIG. 5 is an enlarged view of the region S in FIG.
As shown in FIG. 5, the second main plate 12 and the connecting plate member 30 are welded so that the second welded portion extends over the edge 12 a of the second main plate 12 and the side edge 30 a of the connecting plate member 30. 8 is formed. An opening 8 a is formed at the end of the second welded portion 8 in the longitudinal direction of the panel 10. The opening 8a is formed by removing the longitudinal end 8b of the second weld 8 by machining or the like.
Here, as described above, when the second main plate 12 and the connecting plate member 30 are welded by TIG welding, MIG welding, or the like, the longitudinal end 8b of the second welding portion 8 is formed at a welding start portion and a welding end portion. In general, it is known that welding defects are likely to occur. However, by removing the longitudinal end 8b of the second welded portion 8 to form the opening 8a, the welding defects that are likely to concentrate stress are reliably removed.

  Moreover, it is desirable to form the opening 8a so that the end face 8c in the longitudinal direction of the second welded portion 8 has a substantially arc shape in plan view. Thereby, the side edge 30a of the connecting plate member 30 and the end face 8c in the longitudinal direction of the second welded portion 8 and the edge portion 12a of the second main plate 12 and the end face 8c in the longitudinal direction of the second welded portion 8 are arcuate. Connected smoothly. Therefore, even if a bending moment is generated in the panel assembly 20, it is possible to prevent stress from being concentrated on the boundary between the second welded portion 8, the second main plate 12, and the connecting plate member 30.

  In addition, the opening part 8a of this embodiment penetrates the 2nd welding part 8 in the thickness direction (paper surface front-back direction of FIG. 5) of the connection board member 30 and the 2nd main board 12. As shown in FIG. However, the opening 8 a is not necessarily formed through the second welded portion 8, and may be, for example, a bottomed recess that opens to the formation side of the second welded portion 8. That is, it is only necessary that at least the weld defect of the second welded portion 8 can be removed.

(Connecting part)
As shown in FIG. 3, the adjacent panels 10, 10 include the first weld 7 formed on the edges 11 a, 11 a of the first main plates 11, 11, the side edges 30 a, 30 a of the connecting plate member 30, The two main plates 12 and 12 are connected to each other by a second welded portion 8 formed. A region surrounded by the first main plates 11, 11 of the adjacent panels 10, 10, the side ribs 16, 16, and the connecting plate member 30 is a connecting portion 9 that connects the adjacent panels 10, 10.

  The plate thickness of the connecting plate member 30 may be formed thinner than the plate thickness of the first main plate 11 and the second main plate 12. Thereby, since the connecting plate member 30 can be more easily elastically deformed, deformation due to welding distortion can be reduced. The plate thickness of the connecting plate member 30 is appropriately set according to the strength required for the connecting plate member 30.

(effect)
According to this embodiment, the second welded portion 8 between the second main plate 12 of the panel 10 and each connecting plate member 30 is formed discontinuously along the longitudinal direction of the panel 10. Thereby, when welding the panel 10, even if welding distortion occurs due to heat at the time of welding, the stress due to the welding distortion is interrupted and can be dispersed to each connecting plate member 30. Furthermore, the welding distortion can be absorbed by a plurality of connecting plate members 30 being elastically deformed. Therefore, when the panel joined body 20 is formed, deformation due to welding distortion can be reliably reduced.
Further, by providing the connecting plate member 30 discontinuously in the longitudinal direction of the panel 10, the bending yield load acting on the cross section along the longitudinal direction of the connecting portion 9 by the bending moment is set smaller than that of the panel 10. Therefore, even if the panel joined body 20 is deformed due to welding distortion, the connecting plate member is plastically deformed by bending only the connecting portion 9 having a small bending yield load. Deformation can be easily corrected.

  Moreover, according to this embodiment, the boundary of the edge part 12a of the 2nd main board 12 and the end surface 31 of the connection board member 30 can be connected smoothly. Further, by forming the end surface 31 of the connecting plate member 30 in a curved manner, it is possible to ensure a larger surface area than when it is formed flat. Therefore, the stress generated at the boundary between the edge 12a of the second main plate 12 and the end surface 31 of the connecting plate member 30 can be dispersed and local stress concentration can be prevented, so that the panel joined body 20 having excellent strength can be formed. .

Here, it is generally known that welding defects are likely to occur in the welding start portion and the welding end portion. However, according to the present embodiment, stress is concentrated by forming the opening 8a that divides the second welded portion 8 at the end of the second welded portion 8 corresponding to the welding start portion and the welding end portion. Easy welding defects can be removed. Therefore, the strength of the second welded portion 8 that is a joint portion between the second main plate 12 of the panel 10 and the side edge 30a of each connecting plate member 30 can be improved.
Further, by forming the opening 8 a in a substantially circular shape at the end of the second welded portion 8, the end surface 8 c of the second welded portion 8, the edge 12 a of the second main plate 12, and the side edges of the connecting plate members 30. The connection shape with 30a is smoothly formed in an arc shape. Therefore, even if a bending moment is generated in the panel joined body 20, it is possible to prevent stress from concentrating on the boundary between the second welded portion 8, the second main plate 12, and each connecting plate member 30, and the panel joint having excellent strength. The body 20 can be formed.
Furthermore, since the cross-sectional area of the second welded portion 8 becomes smaller by forming the opening 8a than when the opening 8a is not formed, the periphery of the opening 8a of the second welded portion 8 is plastically deformed. The deformation caused by welding distortion can be easily corrected. Therefore, even if the panel assembly 20 is deformed due to welding distortion, the deformation can be easily corrected by bending only the connecting portion 9 having a small bending yield load.

(Manufacturing method of panel assembly)
Then, the manufacturing process of the panel joined body 20 of embodiment mentioned above is demonstrated using a flowchart.
FIG. 6 is a flowchart of the manufacturing process of the panel assembly 20.
As shown in FIG. 6, the manufacturing process of the panel assembly 20 includes a welding process S10, an opening forming process S20, and a correction process S30. Below, the detail of each manufacturing process is demonstrated.

(Welding process)
The welding step S10 includes a first welding step S10A for welding the first main plates 11 of adjacent panels 10 and a second welding step S10B for welding the second main plates 12, 12 of the plurality of panels 10 and the connecting plate member 30. And.

FIG. 7 is an explanatory diagram of the first welding step S10A. Note that the panel 10 of FIG. 7 is shown with its top and bottom reversed with respect to FIG.
As shown in FIG. 7, in the first welding step S10A, the first main plates 11 of adjacent panels 10 are welded together by friction stir welding. The welding method in the first welding step S10A is not limited to friction stir welding, and may be a welding method such as TIG welding or MIG welding. However, the friction stir welding can form the appearance of the bonded portion more beautifully than TIG welding, MIG welding, or the like. Therefore, the friction stir welding has an advantage in that it is not necessary to apply a resin material to the surface of the first main plate 11 after welding and then perform polishing or coating.

  Specifically, the first welding step S10A is performed according to the following procedure. First, the first main plates 11 of the plurality of panels 10 are placed on a work table (not shown) arranged on the lower side in FIG. 7, and the adjacent edge portions 11 a of the first main plates 11 are attached to each other. Subsequently, while rotating the rotary tool 40, the rotary tool 40 is pressed against the first main plate 11 from the other side toward one side (from the upper side to the lower side in FIG. 7). Note that the pressing force of the rotary tool 40 can be effectively received by placing the first main plate 11 on the work table.

  Subsequently, with the probe portion 40a inserted into the first main plate 11 and the shoulder surface 40b in contact with the surface of the first main plate 11, the rotating tool 40 is connected to the edge portion 11a of the first main plate 11 (that is, a joining line). Move along. Thereby, the edge parts 11a of the adjacent first main plates 11 are melted by frictional heat and joined by friction stir welding. Above, 1st welding process S10A is complete | finished.

(Second welding process)
FIG. 8 is an explanatory diagram of the second welding step S10B. In FIG. 8, the welding distortion generated in the panel joined body 20 is exaggerated.
As shown in FIG. 8, in the second welding step S <b> 10 </ b> B, each of the second main plates 12 and 12 of the plurality of panels 10 and the corresponding side edges of the connecting plate member 30 disposed between the second main plates 12 and 12. 30a and 30a are welded by TIG welding.
The welding method in the second welding step S10B is not limited to TIG welding, and may be friction stir welding. However, the friction stir welding requires a work table for receiving the pressing force of the rotary tool 40. Here, the first main plate 11, the central rib 15 and the side ribs 16 are present on one side (the lower side in FIG. 8) of the second main plates 12, 12, and one side of the second main plates 12, 12 is operated. It is difficult to place on a table. Therefore, in the second welding step S10B, from the viewpoint of workability, the second main plates 12, 12 and the connecting plate member 30 are welded by TIG welding.

Specifically, the second welding step S10B is performed according to the following procedure.
First, as shown in FIG. 4, a plurality of connecting plate members 30 are arranged between the second main plates 12, 12 of the plurality of panels 10 along the longitudinal direction of the panel 10. At this time, the side edges 30a and 30a of each connecting plate member 30 are disposed in contact with the stepped surfaces 18a and 18a of the stepped portions 18 and 18 formed on the edges 12a and 12a of the second main plate 12.

Subsequently, a TIG torch and a brazing material (not shown) are brought close to one edge portion 12a of the second main plate 12 (for example, the right side in FIG. 8) and the side edge 30a of the connecting plate member 30, and the brazing material is placed with the TIG torch. Melt. And it brazes and welds along the one edge part 12a of the 2nd main board 12, and the side edge 30a of the connection board member 30. As shown in FIG. Subsequently, the other edge 12a of the second main plate 12 (for example, the left side in FIG. 8) and the side edge 30a of the connecting plate member 30 are welded in the same manner. Thereby, the connecting plate member 30 is joined between the second main plates 12 and 12.
The above procedure is repeated a plurality of times, and the panel joined body 20 having the connecting portions 9 is formed when all the connecting plate members 30 are joined. Above, 2nd welding process S10B is complete | finished.

Here, a compressive load or a tensile load is generated in the connecting portion 9 due to expansion of the base material due to heat during TIG welding, shrinkage of the base material due to cooling hardening after welding, or the like. As shown in FIG. 8, for example, the panels 10 on both sides of the connecting portion 9 are warped to the other side (the upper side in FIG. 8), and the panel assembly 20 is distorted.
However, the second welded portion 8 between the panel 10 and each connecting plate member 30 is formed discontinuously along the longitudinal direction of the panel 10. Thereby, when welding the panel 10, even if welding distortion occurs due to heat at the time of welding, the stress due to the welding distortion is interrupted and can be dispersed to each connecting plate member 30. Furthermore, the welding distortion can be absorbed by a plurality of connecting plate members 30 being elastically deformed. Thus, since the connection part 9 is elastically deformed satisfactorily and absorbs the welding distortion in the second welding step S10B, the deformation of the panel assembly 20 due to the welding distortion is reliably reduced.

(Opening formation process)
Subsequently, an opening forming step S20 is performed. As shown in FIG. 5, in the opening forming step S20, the opening 8a is formed so as to divide the second welded portion 8 at the longitudinal end 8b of the second welded portion 8 formed in the second welding step S10B. doing.
The opening 8a is formed by machining using a mill such as an end mill (not shown). Specifically, the tool is brought into contact with the longitudinal end 8b of the second welded portion 8 from the side where the second welded portion 8 is formed (the front side in FIG. 5), and the second welded portion 8 is contacted. The longitudinal end 8b is cut. Thereby, the longitudinal end 8 b of the second welded portion 8 is removed, and an end surface 8 c having a substantially arc shape in plan view is formed at the longitudinal end of the second welded portion 8. Thus, the opening forming step S20 is completed.

(Judgment of deformation amount of panel assembly 20)
After the opening forming step S20, the deformation amount of the panel assembly 20 is confirmed by visual confirmation or the like (S25). When it is determined that the deformation amount of the panel bonded body 20 is equal to or greater than the specified value (when it is determined YES in S25), a correction step S30 for correcting the deformation of the panel bonded body 20 is performed. Note that when it is determined that the deformation amount of the panel bonded body 20 is less than the specified value (when NO is determined in S25), the manufacturing process of the panel bonded body 20 ends.

(Correction process)
FIG. 9 is an explanatory diagram of the correction step S30.
As shown in FIG. 9, in the correction step S30, the deformation of the panel assembly 20 is corrected by bending the connecting portion 9 or the like.
Specifically, a method of correcting the deformation by applying a mechanical load with a bender or the like (not shown) in a direction opposite to the warping direction of the panel 10 (from the upper side to the lower side in FIG. 9), a hammer or the like not shown. A method of correcting the deformation by applying a mechanical load, a method of correcting the deformation by heating with a burner (not shown), a method of combining these methods, and the like are conceivable. Thus, the correction process S30 ends when the deformation is corrected, and the manufacturing process of the panel bonded body 20 ends.

(effect)
According to the method for manufacturing the panel assembly 20 of the present embodiment, the second welding step S <b> 10 </ b> B for welding the second main plates 12 in the plurality of panels 10 and the corresponding side edges 30 a of the plurality of connecting plate members 30. Therefore, the second welded portion 8 between the second main plate 12 of the panel 10 and the connecting plate member 30 can be formed discontinuously. Thereby, even if a welding distortion occurs when the panel 10 is welded in the second welding step S <b> 10 </ b> B, the stress due to the welding distortion is interrupted and can be dispersed to each connecting plate member 30. Furthermore, in the second welding step S <b> 10 </ b> B, the welding strain can be absorbed by the plurality of connecting plate members 30 being elastically deformed. Therefore, when the panel joined body 20 is formed, deformation due to welding distortion can be reliably reduced.
In addition, since the opening forming step S20 is included, it is possible to remove a welding defect in which stress tends to concentrate. Therefore, the strength of the second welded portion 8 between the second main plate 12 of the panel 10 and the side edge 30a of each connecting plate member 30 can be improved.
Further, since the straightening step S30 is provided, even if the panel joined body 20 is deformed due to welding distortion, the connecting plate member is formed by bending only the connecting portion having a small bending yield load. 30 can be plastically deformed to easily correct the deformation. In particular, since the correcting step S30 is provided after the opening forming step S20, the deformation due to the welding distortion can be easily corrected by plastically deforming the periphery of the opening 8a of the second welded portion 8. Therefore, even if the panel joined body 20 is deformed due to welding distortion, the periphery of the opening 8a of the second welded portion 8 is bent by, for example, bending only the connecting portion 9 having a small bending yield load. Deformation can be easily corrected by plastic deformation.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The shape of the panel 10 is not limited to the shape of the embodiment. For example, the panel 10 is not limited to a so-called double skin, and the same effect can be obtained even if it is a simple flat plate.
Further, the number of ribs is not limited to the embodiment, and more ribs may be provided.

  About the welding method, friction stir welding was adopted in the first welding step S10A and TIG welding was adopted in the second welding step S10B, but the reverse combination may be used, and both may be carried out by the same welding method, Alternatively, other welding methods other than the above example may be applied.

  In the embodiment, the panel joined body 20 is employed in the vehicle body frame 5 of the transportation system vehicle 1, but the vehicle is not limited to the transportation system vehicle 1. Moreover, the panel joined body 20 of this invention is employable also to structures other than a vehicle.

  In the embodiment, the opening 8a is formed at the end of the second welded portion 8, but the opening 8a may not be formed. However, the present embodiment in which the opening 8a is formed is superior in that the welding defect can be removed. Moreover, although the opening part 8a was formed in the edge part of the 2nd welding part 8, you may form an opening part in the edge part of the 1st welding part 7 in addition to this.

  1: Transportation system vehicle (vehicle) 5: Body frame 8: Second welded portion (welded portion) 8a: Opening 10: Panel 11: First main plate 12: Second main plate 12a: Edge (edge) of second main plate 15: Central rib (rib) 16: Side rib (rib) 20: Panel assembly 30: Connecting plate member 30a: Side edge 31: End face S10: Welding process S10A: First welding process (welding process) S10B: Second welding Process (welding process) S20: Opening formation process S30: Correction process

Claims (6)

Between the edges of a plurality of panels arranged side by side, it is a panel joined body configured by connecting with a connecting portion,
The connecting portion is formed by joining each of the plurality of panels with a corresponding side edge of a connecting plate member disposed between the panels,
A plurality of the connecting plate members are provided apart from each other in the direction along the edge portion. The panel assembly according to claim 1,
The panel is
A first main plate and a second main plate facing each other;
A rib connecting the first main plate and the second main plate;
Have
The connecting portion is formed by joining the adjacent first main plates to each other, and each of the second main plates being joined to a corresponding side edge of the plurality of connecting plate members. Panel assembly. The panel assembly according to claim 1 or 2,
An end face facing the edge along the edge of the connecting plate member is recessed and formed inward of the connecting plate member. The panel assembly according to any one of claims 1 to 3,
A weld is formed so as to straddle the edge of the panel and the side edge of each connecting plate member,
An opening for dividing the welded portion is formed at an end of the welded portion in the direction along the edge. Between the edges of a plurality of panels arranged side by side, a manufacturing method of a panel assembly formed by connecting and having a connecting portion,
A welding step of welding each of the plurality of panels and corresponding side edges of the plurality of connecting plate members provided apart from each other in the direction along the edge;
An opening forming step of forming an opening so as to divide the welded portion at an end portion in a direction along the edge of the welded portion formed in the welding step;
After the welding step and the opening forming step, a correction step for correcting deformation of the panel assembly,
A method for producing a panel assembly, comprising: A vehicle comprising a vehicle body frame formed of the panel assembly according to any one of claims 1 to 4.

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