JPH11314174A - Friction-joining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a good joined part by butting the end part of a first member and the end part of a second member, providing the protruded projecting part in the thickness direction of the member at the end part of the first member, inserting a rotary tool into the butted portion and friction-joining the butted portion. SOLUTION: The right end part of a plate 36 is positioned on the extended line of the corner parts 33b, 34b of recessed parts in a hollow shape material 31 and the rotating center of the rotary tool is positioned on the extended line thereof. The thicknesses of projecting pieces 37 positioned at the lower part of the joining part are thick and the arch in the connecting part from the tip parts of the projecting pieces 37 to the plate 36 is made large and the end parts of the hollow shape material 31 is made to the rigidity so as to support the vertical force. The projecting pieces 38 of the hollow shape material 32 are overlapped with the recessed part of the projecting piece 37 and further, since the plate 36 connected with two plates 33, 34 is provided at near the projecting pieces in the hollow shape material 32, even if there is not the vertical plate 36 just below the corner part of the recessed part, the defective joined part is not developed. The friction-joining is executed by inserting the projecting part of the rotary tool into the joining part of the hollow shape materials 31, 32 by rotated the rotary tool and shifting it along the joining part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction joining method, and is suitable for, for example, joining panels used for aluminum alloy railway cars and buildings.

[0002]

2. Description of the Related Art A two-sided structure (panel) of a railway vehicle structure.
Is disclosed in Japanese Unexamined Patent Publication No. 2-24686.
Japanese Unexamined Patent Publication No. 6-106661 discloses an apparatus using a laminated panel such as a honeycomb panel.

[0003] In the friction joining method, a round bar inserted into a joint is rotated to generate heat, soften, and join. This joining is applied to the butt portion and the overlapping portion. This is WO 9
3/10935 (EP 0615480B1, Tokiohei 7)
505090), Welding & Metal Fabr
ication, January 1995, pages 13-16.

[0004]

In the friction joining method, a downward force acts on the joint due to a reaction in which a member immediately below the rotary tool (round bar) is discharged to the surface during joining. For this reason, when this joining method is applied to joining of a two-sided structure (panel), this downward force causes the joint member of the joining portion to be washed down and deformed, and good joining can be performed. could not.

[0005] The two-sided structure (panel) includes, for example, a hollow material of an extruded material of an aluminum alloy and a honeycomb panel. Conventionally, MIG welding or TIG welding has been performed to join the panels. When friction joining is applied to this joint shape, the joint is bent downward or the member is caused to flow downward by the pressing force at the time of the friction joining.

The inventor has discovered the above phenomenon through various experiments.

[0007] An object of the present invention is to provide good joining when performing friction joining.

[0008]

The above object is achieved by abutting an end of a first member with an end of a second member, and
The end portion of the member has a protrusion projecting in the thickness direction of the member, and a rotary tool is inserted from the protrusion side into the butted portion to frictionally join the butted portion,
Can be achieved by:

According to this, since the outer surface of the structure has no irregularities such as a back bead due to bonding, the structure can be manufactured at low cost.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 shows a case where the joints of hollow members 31 and 32 as panels have a butt type. At the widthwise ends of the hollow members 31, 32, there are vertical plates 36, 36. Before joining, there are vertical plates 36, 36 directly below the rotary tool 50, and the plates 36, 36
They are facing each other and in contact. If they are separated, the gap between them is small. The gap is about 1 mm. Board 3
The center of the convex portion 52 is located on the extension line between 6 and 36.
The plates 36 have sufficient rigidity to support the downward force. The plate 36 is orthogonal to the two plates 33,34. The hollow members 31, 32 are extruded members of an aluminum alloy. The upper and lower surfaces of the hollow mold member 31 coincide with the upper and lower surfaces of the hollow mold member 32. That is, the thicknesses of the hollow mold members 31 and 32 are the same. The same applies to the following embodiments. At the time of friction welding, a boundary 53 between the large diameter portion 51 and the small diameter portion convex portion 52 of the rotary tool 50 is located on the upper surfaces of the hollow mold members 31 and 32. 35 connects two plates 36, 36, and a plurality of them are arranged in a truss shape. Hollow members 31, 3
The shape of the end portion 2 is bilaterally symmetric. Hollow members 31, 3
2 is mounted on a gantry (not shown) and fixed so as not to move. There is also a base below the plates 36,36.

In the friction joining, the convex portion 52 is inserted into the joint between the hollow members 31 and 32 while rotating the rotary tool 50,
It is performed by moving along the joint. The center of rotation of the projection 52 is between the two plates 36, 36.

FIG. 2 shows a state after the friction welding. Numeral 45 indicates the shape of the joining bead after joining. Board 36,
The center of the width of the joining bead 45 is located on an extension line between 36. A bead 45 is provided in the range of the extension of the thickness of the plates 36, 36.
There is. The depth of the joining bead 45 is determined by the height of the projection 52 at the lower end of the rotary tool 50 inserted into the joining portion.

According to this, the plate 3 perpendicular to the plates 33, 34
Since the joints 6 and 36 support the vertical force at the time of frictional joining, the joints do not bend and a good connection can be obtained as shown in FIG. The plate 36 is made as perpendicular to the plates 33 and 34 as possible.

Incidentally, a hole may be formed in the plate 36 for weight reduction. The same applies to the following embodiments.

The joining of the lower surface is performed by inverting the upper and lower surfaces of the hollow material.

In the embodiment of FIG. 3, there is a plate 36 at the end of one hollow section 31 and no plate 36 at the end of the other hollow section 32. The vertical corners of the plate 36 of the hollow mold 31 are recessed so that the tips of the protruding pieces 38 at the ends of the hollow mold 32 can be placed thereon. This recess is a hollow mold 3
1 and the direction perpendicular to the thickness direction (hollow mold material 32).
Side). When the protruding pieces 38 are placed (overlaid) on the concave portions, they are in contact with each other in the figure, but there is actually a gap. In addition, both ends (projecting pieces 38, 38 and corner 3
3b and 34b). The butting portion on the surface side of the two hollow mold members 31, 32, that is, the rotating tool 5
Immediately below the center of the 0, there is the butted portion and the plate 36. The rotation center of the projection 52 is located on an extension of the center of the thickness of the plate 36. That is, the plate 3 is placed on an extension of the center of the thickness of the plate 36.
3 (34) and the joint of plate 33 (34) are located. Board 3
The corners 33b, 34b extending from 3, 34 to the recess are on an extension of the center of the thickness of the plate 36. Or, the corners 33b, 3
The position of 4b is slightly left of the extension of the center of the thickness of the plate 36 in FIG. The plate 36 has rigidity to support the vertical force. The horizontal distance between the tip of the protruding piece 38 and the hollow mold member 31 is the same as in the case of FIG. The height of the projection 52 of the rotary tool 50 is about the thickness of the projection 38. In general, a plastic flow state is formed below the convex portion 38 and frictional joining is performed. Similarly, it becomes larger than the diameter of the convex portion 52 and becomes in a plastic flow state.
It is desirable that the lower surface of the protruding piece 38 and the plate 36 be frictionally joined to a portion below the contact portion.

FIG. 4 shows a state after the joining. The center of the width of the joining bead 45 is located on an extension of the center of the thickness of the plate 36.

In order to support the vertical force, it is desirable that the center of rotation of the rotary tool 50 be located on an extension of the center of the thickness of the plate 36. In order to make the joining amounts of the left and right hollow mold members 31, 32 the same, it is desirable that the corner portions 33b, 34b are present on the extension line. It is desirable that the protruding portion 52 of the rotary tool 50 be located within the extension of the thickness of the plate 36.
Is determined by the vertical force, the position of the convex portion 52, and the strength of the plate 36. For this reason, the thickness of the plate 36 may be smaller than the diameter of the projection 52. In addition, rotary tool 5
Considering the error of the position of 0 and the error of the position of the corners 33b, 34b, the corners 33b, 34 are within the extension of the thickness of the plate 36.
b, and it is desirable that at least a part of the convex portion 52 of the rotary tool 50 be located in the range. According to this, the plate 36 can receive the vertical force at all, and it is possible to substantially prevent deformation of the joint and obtain a good joint. On the basis of the bead 45, the bead 45 is slightly larger than the convex portion 52, but it can be said that the above is substantially the same. The same applies to other embodiments.

According to this joint shape, according to the experiment,
In general, as compared to the case of FIG.
Even when the distance between the first and the second members in the horizontal direction is large, the dent at the joint can be reduced. For this reason, the appearance is good, and the amount of putty can be reduced even when painting. This is probably because the gap between the two ends at the thickness of the protruding piece 38. In addition, it is generally considered that the weight can be reduced. Further, since one hollow mold member is inserted into the other, it is possible to easily align the two members in the height direction.

The shape of the end of the hollow member 31 is bilaterally symmetric, and the shape of the end of the hollow member 32 is bilaterally symmetric. Alternatively, one end of the hollow mold member 31 is as shown in FIG. 3, and the other end has the shape of the end of the hollow mold member 32 of FIG.

In the embodiment shown in FIG. 5, there is substantially no vertical plate 36 immediately below the corners 33b, 34b of the concave portion of the hollow material 31. The right end of the plate 36 is on an extension of the corners 33b and 34b. The rotation center of the rotary tool 50 is on the extension line. The rigidity for increasing the thickness of the projecting piece 37 located below at the joint portion and increasing the arc of the connecting portion from the tip of the projecting piece 37 to the plate 36 so that the end of the hollow mold member 31 supports the vertical force. I have to. The projecting piece 38 of the other hollow mold member 32 overlaps the concave portion of the projecting piece 37 as in the embodiment of FIG. The other hollow mold member 32 has a plate 36 connecting the two plates 33 and 34 near the protruding piece. Thereby, even if there is no vertical plate 36 immediately below the corner of the concave portion, no defect occurs at the joint. However, in the vertical direction of the area of the bead 45, the panel 3
There is one plate 36. FIG. 6 shows a state after the joining.

In the embodiment shown in FIG. 5, the plate 36 of the hollow member 32 can be omitted.

The embodiment of FIG. 7 differs from the embodiment of FIG.
At the joint between the two hollow mold members 31, 32, convex portions 37a, 38a protruding toward the front surface side are provided. That is, the thickness of the joint is thick. The height of the convex portion 37a and the convex portion 38a is the same. Other shapes are the same as those in FIG. 5, but the thickness of the plate 36 and the protrusion 37 is slightly reduced.

According to this, before the friction welding, the convex portion 37 is formed.
Even if there is a gap between a and the projection 38a, the volumes of the projections 37a and 38a fill the gap by frictional joining. Therefore, the appearance is good and the amount of putty can be reduced.

In the prior art, voids are formed in the volume and the joining bead of the member 41 that has flowed downward due to the downward force. According to the joint shape of FIG. 7, at the time of joining, the convex portions 37 a and 38 a plastically flow by the rotary tool 50 and are pushed down, thereby compensating for the volume of the lost member 41. It is possible to prevent such a situation and perform good bonding. FIG. 8 shows the shape of the bead 45 after joining. After joining, if there is an unnecessary portion, it is cut as shown in the figure.

The convex portions 37a and 38a can be applied to FIGS. 1, 3, and 5 and the embodiments described later.

In the embodiment shown in FIG. 9, two upper and lower surfaces can be joined from only one side. Hollow shape members 31,3
The end on the lower surface side of 2 protrudes a projecting piece 34a largely from the same surface as the lower plates 34, 34 toward the other hollow mold member. The tips of the projecting pieces 34a, 34a are substantially in contact. The tips of the upper plates 33, 33 are located behind the tips of the lower plates 34a, 34a. The distal ends of the upper plates 33, 33 and the lower plates 34, 34 are connected by vertical plates 36, 36. The plates 36, 36 are connected in the middle of the plate 34. At the top of the vertical plates 36, 36 there are recesses 39, 39 where the joint 60 overlaps. Fitting 60 to recess 39,3
9, the upper surface of the joint 60 is flush with the upper surfaces of the plates 33, 33. The interval between the two plates 36, 36 is large enough to insert the rotary tool 50, and is as small as possible. The relationship between the plate 36 and the concave portion 39 is as described in the embodiments of FIGS. 3, 5, and 7.

The joining procedure will be described. In the state shown in FIG. 9A, the lower ends of the plates 34a, 34a are joined by the rotary tool 50. At this time, the hollow members 31 and 32 are
a, 34a including the joints. The top surface of the joint bed (the backing of the joint bead) is flat.
The height of the projection 52 of the rotary tool 50 is smaller than the thickness of the plates 34a, 34a. According to this, the lower surface after joining becomes flat. For this reason, the lower surface side can be easily formed as an outer surface of a structure of a railway vehicle or an outer surface of a structure such as a building (a surface on which a decorative plate is not disposed). Generally, irregularities are likely to be formed on the upper surface side (the boundary 53 portion) of the frictional joint.

Next, as shown in FIG.
The joint 60 is placed between 1 and 32.

The longitudinal section of the joint 30 is T-shaped. When both ends of the joint 30 are overlapped with the recesses 32, 32,
Has a gap between it and the joining bead of the lower plate.
The vertical side 61 may not be provided.

Next, as shown in FIG. 3C, the joint between the joint 60 and the hollow mold member 31 is friction-joined by the rotary tool 50. This rotary tool 50 does not need to be the same as the joining tool of (A).

Next, as shown in (D), the joint between the joint 60 and the hollow mold member 32 is friction-joined by the rotary tool 50.

According to this, the joining can be performed from one side, and the reversing operation can be eliminated. By omitting the reversing operation, advantages such as elimination of the reversing and positioning time, elimination of the reversing device, and improvement of assembly accuracy can be obtained.

In the embodiment shown in FIG. 10, the upper and lower surfaces of the hollow mold members 51 and 52 are simultaneously friction-joined.
There is a rotary tool 50a that joins the lower part of the upper rotary tool 50 in the vertical direction. The projection 52 of the rotary tool 50a faces upward. The two rotary tools 50 and 50a are moved at the same speed while facing each other to perform friction welding. 70,
70 is a bed (stand). The centers of rotation of the tools 50 and 50a are collinear. On this line, the hollow mold material 31,
There are 32 junctions.

According to this, since the rotation center of the other rotary tool 50a is located on an extension of the rotation center of the one rotary tool 50, the forces are balanced, the deformation of the bonding portion is small, and the bonding can be performed in a short time. Since it is not necessary to invert the hollow mold members 31 and 32, deformation is small and working time can be reduced.

This embodiment can be applied to other embodiments.

In each of the above embodiments, a hollow member is used as a panel. The following embodiment shows a case where the present invention is applied to a honeycomb panel. As shown in FIG. 11, the honeycomb panels 80a and 80b include two face plates 81 and 82.
A core material 83 having honeycomb-shaped cells, a face plate 81,
The core member 83 and the edge member 84 are brazed to the face plates 81 and 82 to be integrated with each other. The face plates 81 and 82, the core material 83, and the edge material 84 are made of an aluminum alloy. The rim member 84 is an extruded member having a square cross section. The thickness of each piece is plate 8
It is thicker than 1,82. The thickness of the vertical pieces of the contacting edge members 84, 84 is the same as in the case of FIG. The thickness of the two honeycomb panels 80a and 80b is the same.

The embodiment shown in FIG. 11 corresponds to the embodiment shown in FIG. The height of the convex portion 52 of the rotary tool 50 is the face plate 8.
1,82 greater than the thickness. Thereby, the face plate 8
1, 82 and rims 84, 84 are joined. The rim material 84 mainly transmits the load acting on the panels 80a and 80b. After the panels 80a and 80b are manufactured, the two are combined and friction welding is performed.

The embodiment shown in FIG. 12 corresponds to FIG. The edge member 84 of the honeycomb panel 80a has a substantially quadrangular cross section, and has a concave portion at a corner. Honeycomb panel 80b
The edge member 84 has a channel shape with the end side of the honeycomb panel 80b open, and the front end thereof is placed in a concave portion of the edge member 80a.

A honeycomb panel corresponding to FIG. 5 can be manufactured similarly.

The embodiment shown in FIG. 13 corresponds to FIG. After combining the two honeycomb panels 80a0 and 80b, the plate 86 is placed on the upper surface of the face plates 81 and 81, and the plate 8
1, 81 were temporarily fixed by welding. The plate 86 supplements the material flowing out by plastic flow. In FIG. 12, a vertical piece on the end side of the edge member 84 of the honeycomb panel 80a is removed. The vertical force is borne by the thickness of the horizontal piece and the shape around it.

The embodiment shown in FIG. 14 will be described. FIG.
Although the embodiments described so far have been panels having two surfaces (plates), the embodiment of FIG. 14 has substantially one surface (plates 94, 9).
Panels 91 and 92 having 4). However, panel 9
At the ends of 1, 92, the outside with plates 94, 94;
Friction welding is performed at two places inside without a plate. For this reason,
The inner joint has small width surfaces (plates 93, 93). The plates 93, 93 are supported by the plates 96, 96. Even in this case, it can be said that the plate 96 is substantially orthogonal to the plates 93 and 94. The plates 93 and 94 have the same convex portions 37a as in FIG.
38a is provided. A plurality of ribs (plates) 95 for the strength members are arranged on the plates 94 at predetermined intervals. The cross section of the rib 95 is T-shaped. The top surface of the rib 95 is flush with the top surface of the plate 93 at the joint. A strength member (for example, a column) is welded to the top surfaces of the two members, and the top surface serves as a mounting seat for articles. Also, the plates 93, 93 serve as seats for managing the height position of the tool 50. The moving body provided with the tool 50 is the plate 9
3. Move on 93. By the plates 93, 94,
These panels 91 and 92 can also be said to be dihedral structures. Panel 9
Reference numerals 1 and 92 are extrusion members.

The shape of the joint between the panel 91 and the panel 92 in FIG. 14 is such that the plates 96 and 96 face each other as in FIG. 1, but they can be overlapped as shown in FIGS. 3, 5, and 7. it can.

FIG. 15 is a diagram showing an application to the structure of a railway vehicle. The structure includes a side structure 101, a roof structure 102, a floor structure 103, and a wife structure 104 at an end in the longitudinal direction.

The side structure 101 and the roof structure 102 are, for example,
The longitudinal direction of the panels 31, 32, 80a, 80b, 91, 92 is set to the longitudinal direction of the vehicle. The connection between the side structure 101 and the roof structure 102 and the connection between the side structure 101 and the floor structure 103 are performed by MIG welding. Roof structure 102 and side structure 1
01 is often an arc. When the panels 91 and 92 are used for the side structure 102, the surface on which the plate 96 and the rib 96 are located is the inside of the vehicle, and the strength member is a pillar.

The panels 31 and 32 shown in FIG. 9 can be combined with each other. Projected plates 34a, 34
The end of “a” overlaps the concave portions 39 on the plate 32 side.
The joint 60 is not used. The joint can be friction-joined from above and below at the same time. The plates 33 and 34a can be provided with protrusions as shown in FIG.

The technical scope of the present invention is not limited to the language described in each claim of the claims or the language described in the section of the problem to be solved by the invention, and is easily replaced by those skilled in the art. It extends to.

[0048]

According to the present invention, since the projections are joined from the projection side, good friction joining can be performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view after friction welding in FIG.

FIG. 3 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 4 is a longitudinal sectional view after the friction welding in FIG.

FIG. 5 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 6 is a longitudinal sectional view after friction welding in FIG.

FIG. 7 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 8 is a longitudinal sectional view after the friction welding in FIG. 7;

FIG. 9 is a longitudinal sectional view illustrating a procedure of friction welding according to another embodiment of the present invention.

FIG. 10 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 12 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 13 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 14 is a longitudinal sectional view of another embodiment of the present invention.

FIG. 15 is a perspective view of a structure of a railway vehicle.

[Explanation of symbols]

31, 32: hollow material, 33, 34, 34a: plate, 3
5: rib, 36: plate, 50: rotating body for joining, 33b,
34b: corner, 37a, 38a: convex, 39: concave, 5
1, 52: hollow shape material, 91, 92: shape material.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B23K 103: 10

Claims (8)

[Claims] 1. An end of a first member and an end of a second member abut against each other, and the end of the first member at the abutted portion projects in a thickness direction of the member. And friction-joining the butted portion by inserting a rotary tool into the butted portion from the side of the convex portion. 2. The method according to claim 1, wherein the first and second
The member is made of an aluminum alloy, and the rotary tool is inserted into the abutted portion from the side of the convex portion, and the abutted portion is plastically flowed to perform frictional welding. 3. The gap according to claim 1, wherein a gap created between the first member and the second member is formed by inserting the rotary tool into the butted portion. Filling, a friction joining method. 4. The projection according to claim 1, wherein the projections of the butted portions are outer surfaces of the member and protrude in both directions of the thickness of the member, and the rotary tool is inserted from each of the projections to cause friction. Joining, a friction joining method. 5. The method according to claim 1, wherein after the friction welding,
A friction joining method, comprising cutting the convex portion. 6. The friction joining method according to claim 1, wherein each of the projections protrudes downward, and the projections are friction-joined from the side of the projections by the rotary tool. 7. An end portion of the first member and an end portion of the second member are joined by friction joining, and connected to the joining portion, the one end of the first member is connected to the end of the first member. There is a convex part protruding outward, The structure characterized by the above-mentioned. 8. An end of the first member and an end of the second member are joined by friction joining, wherein the joining is formed on one surface of the member and the other substantially parallel to the other surface. And a projection that is connected to the joining portion of the one surface and protrudes outward from the one surface of the first member to the outside of the member. And a protrusion connected to the first member and protruding outward from the member from the other surface of the first member.