JP2005074497A - Panel joining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel joining structure that needs no highly accurate pre-processing. <P>SOLUTION: The structure is intended to join a hollow long panel 1, in which a first and second face plates 11, 12 are connected with slant joining members 13 arranged in a chevron shape, in the width direction using friction stir welding. The panel 1 is composed in such a manner that the first and second face plates 11, 12 are deviated, with the joining members 13 at both ends in the width direction made to tilt in the same direction, and that the panel is provided with projections 11a, 11b, 12a, 12b formed projectingly in the width direction from the joining members 13a at the end in the width direction. In the panel joining structure, the overlapped part arranged with the projections 11a, 11b/12a, 12b of the panels vertically superimposed is joined by friction stir welding. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a panel joint structure for joining, for example, long hollow panels using friction stir welding to form a structure of a railway vehicle and the like. The present invention relates to a panel bonding structure that can be performed without requiring pretreatment.

  A panel having a hollow structure composed of two plates can be found, for example, in a railway vehicle structure or building material made of aluminum alloy. JP-A No. 11-207475 shown as Patent Document 1 below can be cited as a conventional panel joint structure for connecting such panels. 4 and 5 are cross-sectional views showing the panel joining structure described in Patent Document 1, and are process diagrams in the case where the end portions of the panels are joined together and joined.

First, as shown in FIG. 4, recessed corners 103 and 104 are formed at the end of the hollow mold (panel) 101, and the tips of the protruding pieces 105 and 106 at the end of the hollow mold (panel) 102 are the corners. 103 and 104. At this time, the support plate 107 exists at the abutting portion of the two panels 101 and 102, that is, the position where the rotary tool 50 is pressed. When the rotary tool 50 is brought into contact with the abutting portion while applying rotation, the panels 101 and 102 are in a plastic flow state up to below the projecting pieces 105 and 106, and are joined by friction stir welding. Similarly, it becomes a plastic flow state larger than the diameter of the convex portion 52. In joining, friction stir welding is performed up to the contact portion between the projecting pieces 105 and 106 and the support plate 107. Then, as shown in FIG. 5, the bonding is performed such that the center of the width of the bonding bead 110 is positioned on the extension line of the center of the thickness of the support plate 107.
Japanese Patent Laid-Open No. 11-207475 (page 4-5, FIGS. 3 and 4)

  Compared to MIG welding, TIG welding, and the like, friction stir welding is increasingly used as a joining method because the distortion at the time of joining is considerably less and the strength of the joined portion is improved because the amount of heat input by joining is small. . However, compared to MIG welding, TIG welding, and the like, there has been a manufacturing problem that preprocessing accuracy considerably higher than the processing accuracy of the joint portion required for the welding is required. In other words, in the conventional panel joint structure, the abutting portions of both panels to be joined are continuously welded as welding points. Therefore, in order to ensure that the abutting portions can be welded, high-precision pretreatment must be performed. did not become. Furthermore, since the pressing load of the rotary tool 50 acting during friction stir welding is large, the panel 101 must have a special structure having the support plate 107 on one panel 101, which is different from the panel conventionally used. There was a need to produce panels.

  Therefore, an object of the present invention is to provide a panel joint structure that does not require high-precision pretreatment in order to solve such problems.

In the panel joint structure according to the present invention, a hollow long panel formed by connecting a first face plate and a second face plate with an oblique joint member arranged in a mountain shape, using a friction stir welding, in the width direction. The panel is formed by shifting the first face plate and the second face plate so that the joint members at both ends in the width direction are inclined in the same direction, and the joint at the end portions in the width direction. It has a protruding portion formed by protruding in the width direction from the member, and the overlapping portion in which the protruding portions of the panels are arranged one above the other is joined by friction stir welding. .
The friction stir welding is desirably performed in a spot manner.
In addition, it is desirable that a joint between the panels is applied with a sealant or an adhesive.
Further, it is desirable that a space formed between the joint members at the end portions in the width direction is filled with a foam type sound insulating material or a heat insulating material.

In such a panel joint structure according to the present invention, since the overlapping portions of the protrusions formed on both panels are friction stir welded, it is possible to reliably weld without performing high-precision pretreatment as before. And the manufacturing process can be simplified. And the joint member of the joint part, that is, the joint member at the end in the width direction is arranged at a short distance and doubles to receive the load at the time of friction stir welding. Conventional panels can be used without manufacturing the panels.
Further, by performing friction stir welding in a spot manner, it is possible to obtain a panel joint structure in which the amount of heat input is reduced and distortion is remarkably suppressed. In that case, airtightness can be ensured by a sealing agent or an adhesive, and sound insulation can be enhanced by filling a sound insulation material or a heat insulating material.

  The present invention joins, in the width direction, a hollow long panel in which a first face plate and a second face plate are connected by an oblique joint member arranged in a mountain shape using friction stir welding. And the panel is such that the first face plate and the second face plate are shifted so that the joint members at both ends in the width direction are inclined in the same direction, and protrudes in the width direction from the joint member at the end in the width direction. Panel joint structure that does not require high-precision pretreatment It became possible to provide.

  Next, an embodiment of a panel bonding structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a joining structure for joining panels together, and particularly shows a panel joining structure in the case of constituting a structure of a railway vehicle. The panel 1 is an aluminum mold that is long in the direction penetrating the drawing, and includes an inner side plate 11 on the vehicle interior side described on the upper side of the drawing, and an outer side plate 12 on the outer side of the vehicle body described on the lower side of the drawing. It has a hollow structure connected by oblique rib members 13, 13... (Shown as 13a, 13b in FIG. 1) as joint members. The plurality of panels 1, 1... Are connected in the width direction (the lateral direction in the drawing), and the railway vehicle structure 2 is configured as in the cross section shown in FIG. That is, the panel 1 having the hollow structure cross section has a long rectangular shape, and the longitudinal side portions (width direction end portions) are joined to each other, and a box-shaped railway vehicle structure as shown in FIG. Form. A specific joining structure between such panels 1 is shown in FIG.

  Each of the panels 1, 1... Has a cross section viewed in the direction shown in the drawing, and the outer side plate 12 on the lower side of the drawing is longer than the inner side plate 11 on the upper side of the drawing. The face plate 11 is longer than the inner side face plate 11. That is, the inner side surface plate 11 and the outer side surface plate are vertically displaced in the left-right width direction and connected by the rib member 13. And the inner side surface plate 11 and the outer side surface plate 12 have protruded in the width direction from the rib material 13a of the outermost edge both right and left. In the present embodiment, when the panels 1, 1... Are joined, the projecting portions 11a, 11b, 12a, 12b are fitted so as to overlap each other, and friction stir welding is performed on the overlapping portions.

  The protrusions 11a and 11b and the protrusions 12a and 12b that are vertically displaced are overlapped so that one is inserted inside the other in the case of FIG. 1, but the other is the same as shown in FIG. You may make it shift to an up-down direction. And the step part 15 corresponding to the protrusion part 11a, 12a etc. is provided in the other panel 1 so that the front-end | tip of protrusion part 11a, 12a piled up on the outer side may be faced regardless of the indoor side and the outdoor side. Is formed. Thus, when the panels 1 and 1 are fitted together, the outer face plate 12 becomes the outer surface of the railway vehicle structure 2, that is, the design surface that forms the appearance of the railway vehicle. 12a is formed so that the outer face plates 12 and 12 are continuously flush with each other. And it is necessary that there is no step or dent in the joint portion, but in this embodiment, since the processing accuracy is not required, the gap formed in the abutting portion of the projecting portion 12a is filled with putty. Is called. On the other hand, although the protrusion part 11b and the level | step difference 15 are formed so that the inner surface plates 11 and 11 may also become flush | level, since it is covered with the decorative board which comprises a room, it does not necessarily need to be flush and a junction part The slight gap that occurs in the case is not a problem.

  As shown in FIG. 1, after the panels 1 and 1 are brought into contact with each other, friction stir welding is performed by the rotary tool 50 and they are joined together. At this time, in the present embodiment, instead of continuously welding the tips of the protruding portions 11a and 12b against which the tips are abutted, the overlapping portions of the protruding portions 11a and 12a and the protruding portions 11b and 12b are shown in the drawing. We are trying to weld to spot. The reason for spot welding is to reduce the amount of heat input during friction stir welding and prevent the panels 1 and 1 from being distorted.

  The joint portion between the inner side surface plates 11 and 11 and the joint portion between the outer side surface plates 12 and 12 are in positions shifted left and right without overlapping vertically. When performing friction stir welding, the rotary tool 50 is pressed in a direction orthogonal to the panels 1 and 1, and the pressing load is large. Therefore, in Patent Document 1 or the like, a rib member 107 or the like perpendicular to the load position is provided. I support it. In the present embodiment, for example, when joining the inner side plates 11, 11, the outer side plates 12, 12 are performed on the panels 1, 1 placed on the table. The joint position is a portion where the projecting portions 11a and 12a overlap as described above, and is in an intermediate position between the rib members 13 and 13 close to each other.

  The load of the rotary tool 50 applied from the upper side to the lower side of the drawing is mainly supported by rib members 13a and 13b arranged in a mountain shape of the panel 1 on the left side of the drawing. At this time, in this embodiment, since the inner side surface plate 11 and the outer side surface plate 12 are displaced, the rib members 13a and 13a at the joint portion can be doubled at a short distance. Accordingly, the rib material 13a at one joint where the load of the rotary tool 50 acts more greatly is assisted by the other rib material 13a receiving the load of the rotary tool 50. The same applies when the outer side plates 12 and 12 are joined after the inner side plates 11 and 11 are joined.

  As described above, the panel 1, 1,... Requires the airtightness of the joint portion because the outer side plates 12, 12 form the outer surface of the vehicle body. However, in this embodiment, since spot welding is performed without continuous welding, a sealing agent or an adhesive is applied to the joint portion along the abutting portion of the projecting portions 11b and 12a in order to maintain airtightness. Applied. Further, although a space is formed between the rib members 13a and 13a, the airtightness may be enhanced by filling a foam type sound insulating material or heat insulating material therein.

  Further, in the joining structure for joining the panels shown in FIG. 2, the protrusions 11a and 11b and the protrusions 12a and 12b that are vertically displaced as described above are inserted into the other in the case of FIG. In this way, they are shifted in the same vertical direction. The panels 1, 1 are fitted together so that the tips of the protrusions 11 a, 12 b abut against the step portion 15, and at least the outer face plate 12 that becomes the outer surface of the railway vehicle structure 2 has a step or a dent at the joint portion. It is formed to be flush with each other. After the panels 1 and 1 are brought into contact with each other, friction stir welding is performed by the rotary tool 50 and they are joined together. At that time, in order to reduce the amount of heat input, the overlapping portions of the protruding portions 11a, 11b, 12a, and 12b are spot-welded. In order to maintain the airtightness of the spot-welded joint, a sealant or an adhesive is applied, and the space between the rib members 13a and 13a is filled with a foam type sound insulating material or a heat insulating material so as to be airtight. You may make it raise.

  Therefore, according to the panel joint structure of the present embodiment, since the overlapping portion of both panels is friction stir welded, it can be surely welded without performing highly accurate pretreatment as before. The production process can be simplified. 1 and 2 are the same as the conventional panel structure joined by MIG welding or TIG welding without providing a special rib material for friction stir welding. Since the friction stir welding was performed using an object, a panel joint structure by friction stir welding was realized without cost in that respect. And, since the friction stir welding is performed in a spot manner without continuous welding, the heat input of the friction stir welding, which has a smaller heat input compared to MIG welding or TIG welding, is further reduced, and the distortion is remarkably suppressed. A joining structure could be obtained.

  In addition, the panel joint structure of this embodiment, which is spot-stirred by friction stir welding, may be inferior in hermeticity although it has a proven track record and has sufficient strength reliability. It can be solved by securing airtightness with an adhesive. At that time, the sound insulation and airtightness can be improved by filling the space between the rib members 13a and 13a located at the joint with a foam type sound insulation material or a heat insulation material.

As mentioned above, although one embodiment was described about the panel junction structure concerning the present invention, the present invention is not limited to such an embodiment, and various changes are possible in the range which does not deviate from the meaning.
For example, in the above-described embodiment, the panel joint structure in the case where the railway vehicle structure is configured as illustrated in FIG. 3 has been described. However, the panel joint structure related to the building material that configures the outer wall of the building may be used.

It is sectional drawing which showed one Embodiment of the junction structure which joins panels. It is sectional drawing which showed other one Embodiment of the junction structure which joins panels. It is sectional drawing which showed the rail vehicle structure comprised by joining a panel. It is sectional drawing which showed the conventional panel joining structure. It is sectional drawing which showed the conventional panel joining structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel 11 Inner side surface plate 12 Outer side surface plate 13 Rib material 11a, 11b, 12a, 12b Protrusion part 50 Rotating tool

Claims (4)

In a panel joining structure in which a hollow long panel formed by connecting a first face plate and a second face plate with diagonal joint members arranged in a mountain shape is joined in the width direction using friction stir welding,
In the panel, the first face plate and the second face plate are shifted so that the joint members at both ends in the width direction are inclined in the same direction, and project in the width direction from the joint members at the end portions in the width direction. A panel joining structure characterized by having a projecting portion formed and joining the overlapping portions, which are formed by overlapping the projecting portions of the panels vertically, by friction stir welding. In the panel joining structure according to claim 1,
The friction stir welding is performed in a spot manner. In the panel joint structure according to claim 2,
A panel bonding structure characterized in that a sealing agent or an adhesive is applied to a bonding portion between panels. In the panel joining structure according to claim 2 or claim 3,
A panel joining structure, wherein a space formed between the joint members at the end portions in the width direction is filled with a foam type sound insulating material or heat insulating material.

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