JP4298451B2 - Panel joint structure - Google Patents

Description

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

  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. 6 and 7 are cross-sectional views showing the panel bonding structure described in Patent Document 1, and are process diagrams in the case where the end portions of the panels are bonded together and bonded.

First, as shown in FIG. 6, the corners 103 and 104 recessed in the end of the hollow profile (panel) 101 is formed, the tip of the protrusion 105, 106 of the end portion of the hollow profile (panel) 102 The corner portions 103 and 104 are fitted. 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. 7, the joining plate 110 is joined so that the center of the width of the joining 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. In order to solve this problem, various attempts have been made at the end of the joint, but all of them have increased production costs and hindered efficient work.

  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.

The panel joint structure of the present invention is a long, hollow panel that constitutes a railway vehicle structure in which a first face plate and a second face plate are connected by a plurality of joint members arranged in a width direction orthogonal to the longitudinal direction. The first face plates and the second face plates are joined to each other in the width direction using friction stir welding, and the first face plate is an outer face plate located outside the vehicle body of the railway vehicle structure. Thus, the protruding portion protruding in the width direction from the joint member is formed with a thickness thicker than the thickness of the portion other than the protruding portion, and the first face plates protrude from the end surfaces of the protruding portion. The through friction stirrer type rotary tool moves along the applied joining line and is joined through. The second face plate is an inner side face plate located on the inner side of the railway vehicle structure, and is wider than the joint member. Projection protruding in the direction is the projection Except it almost the thickness of the portions of those formed in the same thickness, this second face plate to each other, overlapping the protruding portions, the overlapping portion is characterized in that joined.
The friction stir welding between the second face plates is preferably performed in a spot manner.

The panel joining structure is a long, hollow panel in which a first face plate and a second face plate are connected by a joint member, and friction stir welding is used for the first face plates and the second face plates, respectively. The first face plate and the second face plate are formed with a thickness that is greater than the thickness of the portion other than the protruding portion, the protruding portion protruding in the width direction from the joint member. The first face plates or the second face plates are joined through by moving the through friction stirrer type rotary tool along the joining line where the end faces of the projecting portions are abutted against each other . Things are also conceivable.

Therefore, in the panel joint structure of the present invention, the first face plate or the second face plate also has a protruding portion that is a simple planar shape and is thickened, and the abutment surface between the protruding portions is a through friction stirrer type rotation. Since friction stir welding is performed using a tool, high processing accuracy is no longer required for the joined portion, and high-precision pretreatment is not necessary.
On the other hand, in the case of friction stir welding with overlapping protrusions on the second face plate, the range that can be joined is wide and can be reliably welded without high-precision pretreatment. The process can be simplified. And 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.

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 view of a panel end face showing a first embodiment of a panel joint structure, and particularly shows a panel joint structure in the case of constituting a structure of a railway vehicle. The panel 1 is an aluminum shape that is long in the direction penetrating the drawing, and includes an outer side plate 11 on the outer side of the vehicle body described on the upper side of the drawing and an inner side plate 12 on the inner side of the vehicle body described on the lower side of the drawing. These are hollow structures connected by oblique rib members 13, 13... That are joint members. The plurality of panels 1, 1... Are connected in the width direction (the left-right direction in the drawing), and the railway vehicle structure 5 is configured as shown in a cross section 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. 5 is formed. A specific joining structure between such panels 1 is shown in FIG.

The outer side surface plate 11 and the inner side surface plate 12 of the panel 1 are formed with projecting portions 11a and 11b and projecting portions 12a and 12b projecting from the outermost rib member 13 at both ends in the width direction. The outer side plate 11 is formed such that the thickness of the protruding portions 11a and 11b is thicker than the thickness of the other portions. On the other hand, the entire inner surface plate 12 including the protruding portions 12a and 12b is formed with substantially the same thickness. However, a step 12g is formed in the protruding portion 12a. Therefore, when the panels 1 and 1 are joined to each other, as shown in the drawing, the outer side plates 11 and 11 are abutted against the end surfaces of the protruding portions 11a and 11b, and the inner side plates 12 and 12 are projected to each other. The protruding portion 12b is superimposed on the step 12g of 12a.

  The inner side plates 11 and 11 and the outer side plates 12 and 12 are all joined by friction stir welding. Specifically, on the side of the outer face plates 11 and 11, a through-friction stirrer type rotation that penetrates the joint line L portion where the projecting portions 11 a and 11 b are abutted and further sandwiches the projecting portions 11 a and 11 b up and down. Friction stir welding is performed along the joining line L by the tool 60. On the other hand, on the inner side plates 12 and 12 side, friction stir welding is performed by a rotary tool 50 that pressurizes a stirring pin that rotates from one side (lower side of the drawing) where the protrusions 12a and 12b overlap.

Here, FIG. 4 is a perspective view showing a state of friction stir welding of the outer face plates 11 and 11 by the rotary tool 60, and FIG. 5 is a cross-sectional view thereof.
The through-friction stirring type rotary tool 60 has a rotating shaft 61, a stirring pin 62 protruding concentrically with the rotating shaft 61, and a backing portion 63 provided at the tip of the stirring pin 62. Such a rotary tool 60 includes the backing portion 63, thereby enabling friction stir welding without using a backing required for the rotary tool 50.

Therefore, when the friction stir welding is performed with the rotary tool 60, the rotating stirring pin 62 extends from the end surface portion of the panel 1, 1 along the joining line L to the abutting portion of the projecting portions 11a, 11b. Pushed in. When the rotary tool 60 moves along the joining line L, the lower surface of the rotating shaft 61 and the upper surface of the backing portion 63 sandwich the joining line L portion from above and below, respectively. As a result , frictional heat is generated between the rotating stirring pin 62 and the projecting portions 11a and 11b of the outer side plates 11 and 11, and further, the lower surface of the rotating shaft 61 and the upper surface of the backing portion 63, and the protrusions sandwiched between both surfaces thereof. Frictional heat is also generated between the upper and lower surfaces of the portions 11a and 11b. For this reason, the protrusions 11a and 11b are through-joined by successively generating the plastic fluidized solid phase W and continuously non-plasticizing / integrating it.

  Next, the inner side plates 12 and 12 are joined by the friction stir welding performed by the rotary tool 50 pressed from below in the drawing, with the protruding portion 12b superimposed on the step 12g of the protruding portion 12a. The At that time, the rotating tool 50 positioned outside the panel 1 is backed inside the panels 1 and 1 to receive a pressing load at the time of joining. The inner side plates 12 and 12 are joined by friction stir welding at the overlapping portions of the projecting portions 12a and 12b along the joining line L, but here, spot welding is performed. This is because spot welding makes it possible to reduce the amount of heat input during friction stir welding and prevent the panels 1 and 1 from being distorted. Moreover, it is because the inner side plates 12 and 12 which become the indoor side do not require continuous welding in that airtightness is not required unlike the outside.

  By the way, in the panels 1, 1..., The joined outer side plates 11, 11,... Become the outer surface of the railway vehicle structure 5, that is, the design surface that forms the appearance of the railway vehicle. It is necessary to be flush and that there are no steps or dents in the joint. In that respect, in this embodiment, as shown in FIG. 5, the abutting portions of the protruding portions 11a and 11b having the same thickness are friction stir welded, and the plastic flow solid phase W is generated so that there is no step or dent. Be joined. On the other hand, a step 12g into which the protruding portion 11b enters is formed so that the inner side plates 12 and 12 are also flush with each other, but they are not necessarily flush with each other because they are covered with a decorative plate constituting the room. Some gaps in the parts do not matter.

Therefore, according to the panel joining structure of the present embodiment, the thickness of the projecting portions 11a and 11b is increased so that the friction stir welding is performed by the through friction stirrer type rotary tool 60 provided with the backing portion 63. Therefore, the projecting portions 11a and 11b have a simple planar shape, and the abutting surfaces are not required to have high processing accuracy. As described above, it is no longer necessary to perform high-precision pretreatment for joining the outer face plates 11 and 11 that require relatively good finishing. On the other hand, the protruding portion 12a of the inner surface plate 12, with respect to 12b, since the stirring friction welding the overlapping portion between the protruding portion 12a and the protruding portion 12b, the bonding as in the conventional example shown in FIGS. 6 and 7 High machining accuracy is not required for the part. Therefore, high-precision preprocessing is not necessary.

  Therefore, both the outer side plate 11 and the inner side plate 12 do not require high processing accuracy as in the prior art, so that it is easy to create a mold for molding the panel 1. And the pre-processing performed before joining became easy. Moreover, the panel joining structure which carries out friction stir welding of the protrusions 11a and 11b and the overlapping of the protrusions 12a and 12b is easy to join and has a simple joining structure, and thus has high reliability in strength. high. Furthermore, on the inner side plate 12 side, by performing friction stir welding in a spot manner, the amount of heat input can be reduced and distortion can be suppressed, resulting in a reduction in joining work costs.

Next, another example of the panel bonding structure will be described below with reference to the drawings. FIG. 2 is a diagram showing the panel joint structure of this example , and the same reference numerals are given to the same configurations as those of the first embodiment shown in FIG. The panel joint structure of this example also relates to the box-shaped railway vehicle structure 5 shown in FIG.

Like the panel 1 of the first embodiment , the panel 2 is an aluminum shape that is long in the direction penetrating the drawing, and is described on the outer side plate 11 outside the vehicle body described on the upper side of the drawing and on the lower side of the drawing. The inner side plate 12 on the vehicle body interior side is connected to each other by oblique rib members 13, 13... That are joint members. The outer face plate 11 is provided with protrusions 11a and 11b. The panel 2 is different from the panel 1 of the first embodiment in that the protrusions c and 12d of the inner side surface plate 12 are thick plates that are thicker than other plate thicknesses in the same manner as the inner side surface plate 11. For joining, the end faces of the projecting portions 11a and 11b and the end surfaces of the projecting portions 12c and 12d are brought into contact with each other and subjected to friction stir welding.

  That is, in the joining between the panels 2 and 2, the through friction stirring type rotary tool 60 is pushed along the joining line L where the projecting portions 11a and 11b and the projecting portions 12c and 12d are abutted. In such friction stir welding (see FIG. 4 and FIG. 5), when the rotary tool 60 moves along the joining line L, the lower surface of the rotating shaft 61 and the upper surface of the backing portion 63 are respectively connected to the protruding portion 11a, 11b or the joining line L portion of the projecting portions 12c and 12d is sandwiched from above and below. As a result, frictional heat is generated between the rotating stirring pin 62 and the projecting portions 11a and 11b or the projecting portions 12c and 12d. Further, the lower surface of the rotating shaft 61 and the upper surface of the backing portion 63 are protruded between both surfaces. Frictional heat is also generated between the upper and lower surfaces of the portions 11a and 11b or the protruding portions 12c and 12d. Therefore, the projecting portions 11a and 11b and the projecting portions 12c and 12d are through-joined by successively generating the plastic fluidized solid phase W and continuously unplasticizing and integrating it.

Therefore, according to this panel joint structure, since the protrusions 11a, 11b, 12c, and 12d are thickened, the friction stir welding is performed by the rotary tool 60 provided with the backing part 63. The parts 11a, 11b, 12c, and 12d have a simple planar shape, and their abutting surfaces are no longer required to have high machining accuracy. The joining of the outer side plates 11 and 11 requires a relatively good finish, but no high-precision pretreatment is required. On the other hand, the inner side plate 12 side is joined in the same manner as the outer side plate 11 side.

  Therefore, both the outer side plate 11 and the inner side plate 12 do not require high processing accuracy as in the prior art, so that it is easy to create a mold for molding the panel 1. And the pre-processing performed before joining became easy. Furthermore, the panel joining structure in which the abutting portions of the projecting portions 11a and 11b and the projecting portions 12a and 12b are friction stir welded is easy in joining work and has a high strength reliability because it is a simple joining structure.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is 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 5 is configured as illustrated in FIG. 3 has been described. However, a panel joint structure related to a building material that configures the outer wall of a building may be used.

It is the figure of the end surface part which showed 1st Embodiment of the panel junction structure. It is the figure of the end surface part which showed the other example of the panel junction structure. It is sectional drawing which showed the rail vehicle structure comprised by joining a panel. It is the perspective view which showed the mode of the friction stir welding with a through friction stirrer type rotary tool. It is sectional drawing which showed the mode of the friction stir welding with the penetration friction stirring type rotary tool. 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, 2 Panel 11 Outer side plate 12 Inner side plate 11a, 11b, 12a, 12b, 12c, 12d Protrusion part 13 Rib material 60 Through friction stirring type rotary tool

Claims (2)

The first face plate and the second face plate are connected by a plurality of joint members arranged in the width direction perpendicular to the longitudinal direction, and are hollow long panels constituting the railway vehicle structure , the first face plates and In the panel joint structure in which the second face plates are joined to each other in the width direction using friction stir welding,
The first face plate is an outer face plate located outside the vehicle body of the railway vehicle structure, and a protruding portion protruding in the width direction from the joint member is formed with a thickness thicker than a plate thickness of a portion other than the protruding portion. These first face plates are through-joined by moving the through-friction stirrer-type rotary tool along the joining line where the end faces of the projecting portions are abutted against each other,
The second face plate is an inner side face plate located on the inner side of the railway vehicle structure, and a protruding portion protruding in the width direction with respect to the joint member is formed with a thickness substantially equal to a plate thickness of a portion other than the protruding portion. A panel joining structure characterized in that the second face plates are formed by overlapping the protruding parts and joining the overlapping parts. In the panel joining structure according to claim 1,
The panel joint structure, wherein the friction stir welding between the second face plates is performed in a spot manner.

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