JP2013103676A - Panel joining member, method for manufacturing the same, and vehicle including panel joining member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel joining member that can reduce deformation caused by strain when joining by simple structure, and can easily correct deformation if the deformation is occurred, and to provide a method for manufacturing this panel joining member and a vehicle including this panel joining member.SOLUTION: The panel joining member 20 is composed by having and connecting connection parts 9 between edges 11a and 11a and between edges 12a and 12a of a plurality of panels 10. The connection part 9 is formed by joining second main plates 12 and 12 of the panel 10 with side edges 30a and 30a of the connection plate member 30 disposed between the second main plates 12 and 12 respectively, while the first main plates 11 and 11 of the adjoining panel 10 are joined mutually. The cross sectional flexural yielding loads along the edges 11a and 11a of the connection part 9 are set smaller than the flexural yielding load of the panel 10.

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 of the roof structure, the side structure, and the floor structure constituting the body frame may be formed by joining a plurality of long hollow structure panels 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 panel includes a pair of main plates facing each other and a rib for connecting the main plates, and the connecting portion joins the main plates on one side of the adjacent panels and the main plate on the other side of the panel. Are joined to the corresponding side edges of the connecting plate member disposed between the other main plates, and the bending yield load of the cross section along the edge of the connecting portion is the bending bending of the panel. It is characterized by being smaller than the yield load.

Here, the bending yield load of the cross section along the edge of the connecting portion refers to the yield load with respect to the compressive load or the tensile load acting on the cross section along the edge of the connecting portion due to the bending moment.
According to the present invention, since the bending yield load of the cross section along the edge of the connecting portion is set smaller than the bending yield load of the panel, even if distortion occurs when the panels are joined by welding or the like, the connection The portion can be elastically deformed to absorb the strain. Therefore, when a panel joined body is formed, deformation due to distortion during joining can be reduced.
Even if the panel joined body is deformed due to strain at the time of joining, the deformation can be easily corrected by bending only the connecting portion having a small bending yield load.

  Further, the connecting plate member has a concave portion that is recessed toward the main plate on the one side.

According to the present invention, by forming a recess in the connecting plate member that constitutes the connecting portion, even if strain occurs in the connecting portion during joining, the connecting plate member is elastically deformed to absorb the strain. it can. 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.
Further, the bending yield load of the connecting portion is set smaller than the bending yield load of the panel due to the concave portion of the connecting plate member. The concave portion is recessed toward the main plate on one side opposite to the main plate on the other side to which the connecting plate member is bonded, so that the connecting plate member is plastically deformed at the concave portion, and at the time of bonding. It is possible to easily correct the deformation caused by the distortion.

  Further, the connecting plate member has a through hole.

According to the present invention, the strength of the connecting plate member can be reduced by forming the through hole in the connecting plate member constituting the connecting portion. Thereby, even if distortion arises in a connecting part at the time of joining, the distortion can be absorbed by elastically deforming a connecting plate member. 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.
Further, the bending yield load of the connecting portion is set smaller than the bending yield load of the panel by the through hole of the connecting plate member. By forming the through hole, the cross-sectional area of the connecting plate member is smaller than when the through hole is not formed, so that the periphery of the through hole of the connecting plate member is plastically deformed to reduce distortion during joining. The deformation caused by it can be easily corrected.
In particular, by appropriately setting the position and number of through holes formed in the connecting plate member, the bending yield load of the cross section along the edge of the connecting portion can be easily set to a desired value.

  Further, the connecting plate member is characterized in that the plate thickness is formed thinner than the plate thickness of the one main plate.

According to the present invention, the strength of the connecting plate member can be lowered by forming the connecting plate member constituting the connecting portion thinner than the plate thickness of the main plate on one side. Thereby, even if distortion arises in a connecting part at the time of joining, the distortion can be absorbed by elastically deforming a connecting plate member. 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.
Moreover, the bending yield load of a connection part is set small with respect to the bending yield load of a panel by forming a connection board member thinner than the plate | board thickness of the main plate of one side. And, by forming the connecting plate member thinner than the thickness of the main plate on one side, the cross-sectional area of the connecting plate member is reduced, so that the periphery of the through hole of the connecting plate member is plastically deformed, Deformation due to distortion can be easily corrected.
In particular, by appropriately setting the plate thickness of the connecting plate member, the bending yield load of the cross section along the edge of the connecting portion can be easily set to a desired value.

  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, The panel has a pair of main plates facing each other and a rib connecting the main plates, and the bending yield load of the cross section along the edge of the connecting portion is set smaller than the bending yield load of the panel, A first joining step for joining the main plates on one side of the adjacent panels, each of the main plates on the other side of the panel, and corresponding side edges of the connecting plate members disposed between the main plates on the other side; And a correction step of correcting the deformation of the panel assembly after the first bonding step and the second bonding step.

According to the present invention, when the main plate on the other side and the side edge of the connecting plate member are joined in the second joining step, the connecting plate member constituting the connecting portion is elastically deformed, thereby joining by welding or the like. Can absorb the distortion generated. Therefore, when a panel joined body is formed, deformation due to distortion during joining can be reduced.
In addition, since a straightening process is provided, even if the panel assembly is deformed due to distortion at the time of joining, the connecting plate member is formed by bending only the connecting portion having a small bending yield load. Can be easily deformed by plastic deformation.

  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 rail car provided with the panel joined object of a first embodiment. It is sectional drawing of the panel of 1st embodiment. It is sectional drawing of the panel assembly of 1st embodiment. It is sectional drawing of the panel assembly which concerns on the 1st modification of 1st embodiment. It is sectional drawing of the panel assembly which concerns on the 2nd modification of 1st embodiment. It is explanatory drawing of the manufacturing process of a panel joined body. It is explanatory drawing of a 1st joining process. It is explanatory drawing of a 2nd joining process. It is explanatory drawing of a correction process. It is a top view of the connecting plate member of a second embodiment. It is a top view of the connecting plate member concerning the 1st modification of a second embodiment. It is a top view of the connecting plate member concerning the 2nd modification of a second embodiment. It is a top view of the connecting plate member concerning the 3rd modification of a second embodiment. It is a top view of the connecting plate member concerning the 4th modification of a second embodiment.

(First embodiment)
Hereinafter, the panel assembly 20 of the first embodiment will be described.
FIG. 1 is a perspective sectional view of a railway vehicle 1.
As shown in FIG. 1, the railway vehicle 1 includes a vehicle body frame 5 that includes, for example, a roof structure 2, a plurality of pairs of side structures 3 that face 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 pair of main plates 11, 12 (first main plate 11 and second main plate 12) facing each other, and a plurality of ribs (a central rib 15 and a pair of side ribs 16, 16) and 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 first 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. Moreover, the connection plate member 30 is arrange | positioned between the 2nd main plates 12 and 12 on the other side (lower side in FIG. 3) of the adjacent panels 10 and 10, and the side edges 30a and 30a of the connection plate member 30; The step portions 18 and 18 formed on the edge portions 12a and 12a of the second main plates 12 and 12 are joined by a welding method such as TIG (Tungsten Inert Gas) welding or MIG (Metal Inert Gas) welding.

  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)
As shown in FIG. 3, the connecting plate member 30 is a plate-like member having a substantially U-shaped cross-sectional view having a recess 35 that is recessed toward the first main plate 11. The lengths in the direction are the same. The plate thickness of the connecting plate member 30 is formed substantially the same as the plate thickness of the first main plate 11 and the second main plate 12. The recess 35 may be located in a part of the connecting plate member 30. That is, only a part of the connecting plate member 30 may be substantially U-shaped in cross section.

  The connecting plate member 30 has side edges 30a and 30a that can come into contact with the stepped surfaces 18a and 18a, and a flat portion that is formed on one side (upper side in FIG. 3) of the second main plate 12 at the approximate center in the short direction. 32 and curved portions 31, 31 that are formed on both sides in the short-side direction across the flat portion 32 and smoothly connect the side edges 30 a, 30 a and the flat portion 32. A concave portion 35 is formed by the flat portion 32 and the curved portions 31 and 31.

(Connecting part)
As described above, the adjacent panels 10, 10 are joined portions (hereinafter referred to as “first joined portions”) 7 of the edge portions 11 a, 11 a of the first main plates 11, 11 and the side edges 30 a of the connecting plate member 30. , 30a and the second main plates 12, 12 are connected by a joint 8 (hereinafter referred to as "second joint"). 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.

Here, when the side edges 30a and 30a of the connecting plate member 30 and the step portions 18 and 18 of the second main plates 12 and 12 are welded, welding distortion occurs due to heat during welding. However, since the connecting plate member 30 constituting the connecting portion 9 is formed with a recess 35 that is recessed toward the first main plate 11, a compressive load or a tensile load is generated in the connecting portion 9 along the short direction. Even so, the connecting plate member 30 is elastically deformed without concentration of stress. That is, the yield load (hereinafter referred to as “bending yield load”) against the compressive load or the tensile load acting on the cross section along the edges 11 a and 11 a of the first main plate 11 in the connecting portion 9 is larger than the bending yield load of the panel 10. Set small.
Thereby, since the connection part 9 is elastically deformed satisfactorily and absorbs the welding distortion, when the panel bonded body 20 is formed, the deformation of the panel bonded body 20 due to the weld distortion during welding is reliably reduced. . Furthermore, even if the panel assembly 20 is deformed due to welding distortion, the connecting plate member 30 can be selectively plastically deformed to correct the deformation of the panel assembly 20.

  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.

(First modification of the first embodiment)
FIG. 4 is a cross-sectional view of the panel assembly 20 according to the first modification of the first embodiment.
In the panel joined body 20 of the embodiment, the concave portion 35 of the connecting plate member 30 is formed at one side of the second main plate 12 at the approximate center in the short side direction, and the side edges 30a and 30a and the flat portion. And the curved portions 31 and 31 that smoothly connect the two. On the other hand, in the 1st modification of embodiment, the recessed part 35 of the connection board member 30 is dented and formed toward the 1st main board 11 with the predetermined | prescribed bending R, The panel joined body of embodiment. 20 and different. In addition, description is abbreviate | omitted about the structure similar to embodiment.

  As shown in FIG. 4, the connecting plate member 30 according to the first modification of the first embodiment sandwiches the recess 35 and the recess 35 that is recessed on one side (upper side in FIG. 4) at the approximate center in the short-side direction. And the flat portions 33 formed on both sides in the short direction. The concave portion 35 is formed with a bottom portion 35a that is recessed toward the first main plate 11 with a predetermined bending R, and a connecting portion that is formed on both sides in the short direction across the bottom portion 35a and smoothly connects the bottom portion 35a and the flat portion 33. 35b. Thereby, when the connecting plate member 30 is elastically deformed, the stress is prevented from concentrating on a specific portion.

(Second modification of the first embodiment)
FIG. 5 is a cross-sectional view of a panel assembly according to a second modification of the first embodiment.
The second modification of the embodiment is different from the panel assembly 20 according to the first embodiment and the first modification in that a plurality of recesses 35 are formed.
As shown in FIG. 5, the connection plate member 30 according to the second modification of the first embodiment has a plurality of recesses 35 arranged in the short-side direction. Adjacent recesses 35 are smoothly connected by connecting portions 35b formed on both sides in the short direction across the bottom 35a. Thus, the connecting plate member 30 is formed in a substantially bellows shape in sectional view by the plurality of bottom portions 35a and the connecting portions 35b. It is desirable that the bend R of the bottom portion 35a and the bend R of the connection portion 35b are formed to have substantially the same size. Thereby, when the connecting plate member 30 is elastically deformed, the stress is prevented from concentrating on a specific portion.

(Effect of each modification of 1st embodiment and 1st embodiment)
According to this embodiment and each modification, since the bending yield load of the cross section along the edge portions 11a and 11a of the first main plate 11 in the connecting portion 9 is set smaller than the bending yield load of the panel 10, the panel Even if a welding strain occurs when joining 10 by welding, the connecting portion 9 can be elastically deformed to absorb the welding strain. Therefore, when the panel joined body 20 is formed, deformation caused by welding distortion can be reduced.
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.

Moreover, according to this embodiment and each modification, by forming the recess 35 in the connecting plate member 30 constituting the connecting portion 9, the connecting plate member 30 is elastic even if distortion occurs in the connecting portion 9 during welding. The distortion can be absorbed by the deformation. Therefore, when the panel joined body 20 is formed, deformation due to distortion during welding can be reliably reduced.
Further, the bending yield load of the connecting portion 9 is set smaller than the bending yield load of the panel 10 by the recess 35 of the connecting plate member 30. The concave portion 35 is recessed toward the first main plate 11 opposite to the second main plate 12 to which the connecting plate member 30 is welded, so that the connecting plate member 30 is plastically deformed by the concave portion 35. Thus, deformation caused by welding distortion can be easily corrected.

(Manufacturing method of panel joined body of first embodiment)
Then, the manufacturing process of the panel joined body 20 of 1st 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 joined body 20 is provided with 1st joining process S10, 2nd joining process S20, and correction process S30. Below, the detail of each manufacturing process is demonstrated.

(First joining process)
FIG. 7 is an explanatory diagram of the first joining step S10. 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 1st joining process S10, the 1st main plates 11 of the adjacent panel 10 are welded by friction stir welding. Thereby, the 1st junction part 7 (refer FIG. 3) is formed in the boundary of the 1st main plates 11 and 11. FIG. The welding method in the first joining step S10 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 joining step S10 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 joining process S10 is complete | finished.

(Second joining process)
FIG. 8 is an explanatory diagram of the second joining step S20. In FIG. 8, the welding distortion generated in the panel joined body 20 is exaggerated.
As shown in FIG. 8, in the second joining step S <b> 20, each of the second main plates 12, 12 of the plurality of panels 10 and the corresponding side edge of the connecting plate member 30 disposed between the second main plates 12, 12. 30a and 30a are welded by TIG welding. Thereby, the 2nd junction part 8 (refer FIG. 3) is formed in the boundary of the 2nd main board 12 and the connection board member 30. FIG. In addition, the welding method in 2nd joining process S20 is not limited to TIG welding, Friction stir welding may be sufficient. 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 joining step S20, the second main plates 12, 12 and the connecting plate member 30 are welded by TIG welding from the viewpoint of workability.

Specifically, the second joining step S20 is performed according to the following procedure.
First, the connecting plate member 30 is disposed between the second main plates 12 and 12 of the plurality of panels 10. At this time, the side edges 30a and 30a of the connecting plate member 30 are arranged in contact with the stepped surfaces 18a and 18a of the stepped portions 18 and 18 formed on the edge portions 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 connection board member 30 is joined between the 2nd main plates 12 and 12, and the panel assembly 20 which has the connection part 9 is formed. Above, 2nd joining process S20 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, since the connecting plate member 30 constituting the connecting portion 9 has a recess 35 that is recessed toward the first main plate 11, even if a compressive load or a tensile load is generated in the connecting portion 9, stress is not generated. The connecting plate member 30 is elastically deformed without being concentrated. Thus, since the connection part 9 is elastically deformed satisfactorily and absorbs the welding strain in the second joining step S20, the deformation of the panel joined body 20 due to the welding strain is reliably reduced.

(Judgment of deformation amount of panel assembly 20)
After the second joining step S20, the deformation amount of the panel joined body 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 F with a bender etc. (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 (not shown), etc. A method of correcting the deformation by applying a mechanical load F, a method of correcting the deformation by heating with a burner (not shown), a method of combining these methods, and the like are conceivable. When the deformation is corrected, the correction process S30 is completed, and the manufacturing process of the panel assembly 20 is completed.

(effect)
According to the present embodiment, when the second main plates 12 and 12 and the side edges 30a and 30a of the connecting plate member 30 are joined in the second joining step S20, the connecting plate member 30 constituting the connecting portion 9 is elastically deformed. By doing, the welding distortion which generate | occur | produces by TIG welding can be absorbed. Therefore, when the panel joined body 20 is formed, deformation caused by welding distortion can be reduced.
Further, since the straightening step S30 is provided, even if the panel joined body 20 is deformed due to welding distortion, the connecting plate is formed by bending only the connecting portion 9 having a small bending yield load. The member 30 can be plastically deformed to easily correct the deformation.

(Panel assembly of the second embodiment)
Next, the panel assembly of the second embodiment will be described.
FIG. 10 is a plan view of the connecting plate member 30 of the second embodiment.
In the panel bonded body 20 of the first embodiment, the bending yield load at the connecting portion 9 is set to be smaller than the bending yield load of the panel 10 by forming the recess 35 in the connecting plate member 30. On the other hand, in the second embodiment, by forming the through hole 37 in the connecting plate member 30, the bending yield load at the connecting portion 9 is set smaller than the bending yield load of the panel 10, Different from one embodiment. In addition, description is abbreviate | omitted about the structure similar to 1st embodiment.
As shown in FIG. 10, the connecting plate member 30 of the second embodiment has a substantially circular through hole 37 at the substantially center of the connecting plate member 30 in the short direction (vertical direction in FIG. 10). A plurality of members 30 are formed side by side along the longitudinal direction of the member 30 (left-right direction in FIG. 10). By forming the through hole 37, the strength of the connecting plate member 30 is reduced so that it can be easily elastically deformed.

(Panel assembly of the first to fourth modifications of the second embodiment)
FIGS. 11-14 is a top view of the connection board member 30 of the 1st-4th modification of 2nd embodiment.
As shown in each modification of FIGS. 11 to 14, the opening area and the number of the through holes 37 can be appropriately set according to the strength required for the connecting plate member 30.

  As shown in FIG. 11, in the first modification of the second embodiment, substantially circular through holes 37 are formed side by side along the longitudinal direction of the connecting plate member 30, and the connecting plate member 30. Three rows are formed in the short direction. The through holes 37 in each row are alternately arranged in a staggered manner.

  As shown in FIG. 12, in the second modification of the second embodiment, a plurality of substantially elliptical through-holes 37 having a long axis along the longitudinal direction of the connecting plate member 30 are formed. The through holes 37 are formed side by side along the longitudinal direction of the connecting plate member 30, and are further formed in two rows in the short direction of the connecting plate member 30. The through holes 37 in each row are alternately arranged in a staggered manner.

  As shown in FIG. 13, in the third modified example of the second embodiment, the through holes 37 of the second modified example described above are formed in three rows in the short direction of the connecting plate member 30. The through holes 37 in each row are alternately arranged in a staggered manner.

  As shown in FIG. 14, in the fourth modification of the second embodiment, the connecting plate member 30 has a long side 37 a along the short direction, and the connecting plate member 30 has a short side 37 b along the long direction. A plurality of substantially rectangular through holes 37 are formed. The short side 37b of the through-hole 37 bulges outwardly in the short direction of the connecting plate member 30, and suppresses concentration of stress when the connecting plate member 30 is deformed. A plurality of through holes 37 are formed side by side along the longitudinal direction of the connecting plate member 30 at the approximate center in the short direction of the connecting plate member 30.

(Effect of each modification of 2nd embodiment and 2nd embodiment)
According to each modification of 2nd Embodiment and 2nd Embodiment, the intensity | strength of the connection plate member 30 can be lowered | hung by forming the through-hole 37 in the connection plate member 30 which comprises the connection part 9. FIG. Thereby, even if distortion arises in connecting part 9 at the time of welding, the distortion can be absorbed by connecting plate member 30 elastically deforming. Therefore, when the panel joined body 20 is formed, it is possible to reliably reduce deformation due to distortion during joining.
Further, the bending yield load of the connecting portion 9 is set to be smaller than the bending yield load of the panel 10 by the through hole 37 of the connecting plate member 30. And, by forming the through hole 37, the cross-sectional area of the connecting plate member 30 becomes smaller than when the through hole 37 is not formed, so that the periphery of the through hole 37 of the connecting plate member 30 is plastically deformed, Deformation due to distortion during welding can be easily corrected.
In particular, by appropriately setting the position and number of the through holes 37 formed in the connecting plate member 30, the bending yield load of the cross section along the edge 11a of the first main plate 11 in the connecting portion 9 can be easily set to a desired value. it can.

  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 each embodiment and each modification. For example, the number of ribs is not limited to each embodiment and each modification, and more ribs may be provided.

The shape of the connecting plate member 30 is not limited to the shape of each embodiment and each modification. For example, you may combine the shape of the connection plate member 30 of 1st embodiment, and the shape of the connection plate member 30 of 2nd embodiment. Specifically, a recess may be formed in the connecting plate member 30 having the through hole 37.
Moreover, the shape of the through-hole 37 is not limited to the shape of 2nd embodiment and each modification. For example, the through hole 37 is not limited to a circular shape or an elliptical shape, and may be formed in a substantially cross shape in plan view.

  In the second modification and the third modification of the second embodiment, the substantially elliptical through-hole 37 having a long axis along the longitudinal direction of the connecting plate member 30 is formed. However, for example, a substantially elliptical through hole having a long axis along the longitudinal direction of the connecting plate member 30 and a substantially elliptical through hole having a long axis along the short direction of the connecting plate member 30 are provided. You may combine.

  About the welding method, friction stir welding was adopted in the first joining step S10, and TIG welding was adopted in the second joining step S20. However, the reverse combination may be used, and both may be performed by the same welding method. Alternatively, other welding methods other than the above example may be applied.

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

  1: Railcar (vehicle) 5: Body frame 10: Panel 11: First main plate (one main plate) 11a: Edge (edge) of the first main plate 12: Second main plate (other 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 35: Recess 37: Through hole S10: First joining step S20: Second joining step S30: Correction step

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 panel has a pair of main plates facing each other, and a rib connecting the main plates,
In the connecting portion, the main plates on one side of the adjacent panels are joined to each other, and each of the main plates on the other side of the panel corresponds to each of the connecting plate members disposed between the main plates on the other side. Formed by joining the edges,
A panel joined body, wherein a bending yield load of a section along the edge of the connecting portion is smaller than a bending yield load of the panel. The panel assembly according to claim 1,
The said connection board member has the recessed part dented toward the said main board of the said one side, The panel joined body characterized by the above-mentioned. The panel assembly according to claim 1 or 2,
The said connection board member has a through-hole, The panel joined body characterized by the above-mentioned. The panel assembly according to any one of claims 1 to 3,
A panel joined body, wherein the connecting plate member is formed to have a thickness less than a thickness of the one main plate. 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,
The panel has a pair of main plates facing each other, and a rib connecting the main plates,
The bending yield load of the cross section along the edge of the connecting portion is set smaller than the bending yield load of the panel,
A first joining step for joining the main plates on one side of the adjacent panels;
A second joining step of joining each of the other main plates of the panel and a corresponding side edge of each of the connecting plate members arranged between the other main plates;
After the first joining step and the second joining step, a correction step for correcting the 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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