JPH1037922A - Joining device and joining method for hollow structural angle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a lightweight joining part with high rigidity by means of a simple inexpensive machining means by inserting a plate type projection arranged in the end part of the first hollow structural angle into an insertion hole in the second hollow structural angle and welding and fixing the plate type projection and the second hollow structural angle together. SOLUTION: The first hollow structural angle 1 and the second hollow structural angle are provided with equal cross sections, and the end part of the first hollow structural angle 1 is cut while its upper and lower faces are cut away so as to be formed into two plate type projections 3, 3. Slit type opening hole parts 4, 4 are arranged in a joining face of the second hollow structural angle 2. On two faces adjacent to the joining face of the second hollow structural angle 2 and on the opposed side face of the joining face, in the positions with which end faces 5, 5 of the plate type projections 3, 3 in the first hollow structural angle 1 are brought into contact from inside, two slot type small opening hole parts 11, 11 are arranged on each face. In the joining arrangement of the first hollow structural angle 1 and the second hollow structural angle 2, the plate type projections 3, 3 and the wall face of the second hollow structural angle 2 are welded together in the small opening hole parts 11, 11 by means of plug welding. Subsequently, butt welding is carried out in the joining line 6, while fillet welding is carried out in a joining line 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to any structure requiring a rigid and lightweight frame, and particularly to a space frame structure, that is, an aluminum alloy hollow extruded shape used for an automobile structure. A joining device and a joining method for hollow members intended to be used for a frame structure joined to a member.

[0002]

2. Description of the Related Art Conventionally, as a method of three-dimensionally joining an aluminum alloy hollow extruded shape, a method of using a separate member called a joining node at a joint portion, a method of directly abutting the extruded shape material, and joining by welding. There is known a method of processing or providing a backing plate and joining by welding, bonding, bolt / nut fastening, rivet, caulking alone or in combination.
The space frame structure was also known. In addition, as a joining method used for a pace frame structure, the joining portion must be lightweight, have high rigidity, and can be constructed with high productivity and low cost while maintaining sufficient dimensional accuracy.

[0003]

The method of using a joint node made of a casting for the joint portion increases the cost because it is necessary to design a joint node having a complicated shape for each joint point and raise a dedicated mold. There is a problem that the added weight cannot be ignored. The method of welding and joining the extruded members directly
There were problems that it was difficult to obtain dimensional accuracy and the rigidity of the joint was insufficient. Also, the method of processing the joint end or providing a backing plate and joining by welding, bonding, bolt and nut fastening, rivet, caulking, etc. alone or in combination generally increases the bonding strength and rigidity Thus, there is a problem that the cost, additional weight, and the number of steps required for the connection increase.

[0004]

In order to solve the above-mentioned problems, a plate-like projection provided at an end of a first hollow member is inserted into an insertion hole of a second hollow member, and the plate-like projection is provided. The above-mentioned conventional problems were solved by welding and fixing the second hollow profile.

In other words, the invention of this joining apparatus is a joining apparatus for joining an end of a first hollow member to a side wall of a second hollow member, wherein the plate-like projection at the end of the first hollow member is connected to a second hollow member. A hollow profile joining apparatus characterized in that the plate-shaped projection and the second hollow profile are welded to each other by being inserted into an insertion hole in a side wall of the profile. Further, the invention of the joining method is a method of joining the end of the first hollow profile to the side wall of the second hollow profile, wherein the plate-like projection provided at the end of the first hollow profile is formed of the second hollow profile. Inserted into an insertion hole provided in the side wall, the end face of the plate-shaped projection abuts on the inner side wall of the second hollow shape member, and a welding hole is provided in the side wall of the second hollow shape member at the corresponding contact portion. It is a joining method of a hollow profile characterized by welding a plate-like projection and a side wall of a second hollow profile via a welding hole.

In another aspect of the present invention, the whole or a part of the end face of the plate-shaped projection is in contact with the inner wall of the second hollow profile, and the cross section of the first and second hollow profiles is formed. The shape is characterized by a quadrangle, a circle, a triangle, and other polygons. Further, the plate-shaped projections are characterized in that the number of the plate-shaped projections is one to three, and the plate-shaped projections are integrally formed with the end of the first hollow member, or another member is connected by welding or other methods. It is a characteristic.

[0007] In the above, the whole or a part of the end face of the plate-like projection of the first hollow member abuts on the inner wall of the second hollow member because of the strength for joining the first and second hollow members. Is considered. In the above, the number of plate-like projections is 1
The reason why the number of sheets is set to three is that while an increase in the number of sheets leads to strengthening of the joint, the additional weight increases and the production cost increases. In addition to integrally providing the plate-shaped projections at the end of the first hollow member, the second member is connected as a separate member, for example, by joining a second hollow member having an irregular cross section (FIG. 2). This is because, in some cases, it may not be possible to integrally mold the end of the first hollow profile. In order to form the integrally molded plate-like projection into the first hollow member, a part of the wall is provided by cutting. The second into which the plate-like projection is inserted
The insertion hole of the hollow member may be a slit having a width approximately equal to the thickness of the plate-like projection, and is machined in advance. Since the insertion hole has a slit shape, machining is easy, and positional accuracy is maintained during assembly. Further, since the side wall of the second hollow member is not largely cut off, the strength and rigidity of the hollow member are hardly impaired. The plate-like projection is inserted into the second hollow profile to form a vertical vertical partition in the longitudinal direction of the second hollow profile, and is joined to the second hollow profile by plug welding. By preventing cross-sectional deformation, coupling and rigidity are significantly increased. Further, since the welding holes are provided on the side walls of the second hollow profile, the plate-like projections and the second hollow profile can be easily welded from the outside, and the hole for plug welding is easy to machine, and It does not impair the strength and rigidity of the hollow profile. Therefore, according to the joining method of the present invention, a lightweight and highly rigid joint can be formed by relatively easy and inexpensive processing means and a minimum number of parts. In the above,
When the plate thickness of the aluminum alloy member to be plug-welded is about 3 mm or less, the plug welding can be performed by omitting the welding hole and melting off the plate thickness by a welding arc.

[0008]

According to the present invention, a plate-like projection provided at an end of a first hollow member is inserted into an insertion hole provided on a side wall of a second hollow member, and an end face of the plate-like projection is provided. Is in contact with the inner side wall of the second hollow profile, a welding hole is provided in the side wall of the second hollow profile at the corresponding contact portion, and the plate-like projection and the side wall of the second hollow profile are connected via the welding hole. Welded.

[0009]

Embodiment 1 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention in which an aluminum alloy extruded square tube (hereinafter referred to as a hollow member) is joined in a T-shape.
The first hollow profile 1 and the second hollow profile 2 have the same cross section, an outer shape of a square having a side of 60 mm, and a thickness of 3 mm. The end of the first hollow profile 1 was cut, and the upper and lower surfaces in FIG. 1 were cut off to form two plate-like projections 3 with a height of 54 mm and a protruding length of 57 mm. 54 mm high and 3 m wide on the joining surface of the second hollow profile 2
Two slit-shaped openings 4, 4 of m are provided so that the distance between the center lines is 57 mm. The processing dimensional accuracy is such that the plate-like projections 3, 3 provided on the first hollow member 1 are inserted into the slit-shaped openings 4, 4 of the second hollow member 2, and the plate-like projections 3,
The end faces 5, 5 of 3 are adjusted so as to contact the inner wall around the hollow portion 12 of the second hollow profile 2 to form two partition doors 10. At two surfaces (upper and lower surfaces) adjacent to the joint surface of the second hollow profile 2 and a side surface facing the joint surface, the end surfaces 5, 5 of the plate-like projections 3, 3 of the first hollow profile 1 are inside. From each other, two pieces of 3 mm in width and 1 piece in length
A total of 12 small hole portions 11 having a long hole shape of 5 mm were provided.

While holding the first hollow profile 1 and the second hollow profile 2 in the arrangement at the time of joining, the 12 small opening portions 11, 11
In (2), the plate-like projections 3, 3 of the first hollow profile 1 and the wall surfaces of the second hollow profile 2 were plug-welded by MIG. Next, the joining line 6 of the first hollow section 1 and the second hollow section 2 shown in FIG. 1B and the joining line opposed thereto are butt-welded,
The joint line 7 and the joint line facing it were fillet welded.

In this embodiment, no additional member for joining is required, and the cutting of the first hollow section 1 and the second hollow section 2 can be easily performed by a numerically controlled cutting machine. It is easy to secure the joining position accuracy, and the total length of the welding line is short,
The coupling rigidity was also necessary and sufficient.

[0012] As in this embodiment, the elongated small opening 1
In general, the plug welding performed on the holes 1 and 11 is performed in the circular hole 15.
May be referred to as slot welding to distinguish it from plug welding. In the present invention, both are collectively called plug welding. That is, in a state where the first hollow profile 1 and the second hollow profile 2 which are the materials to be welded are welded, the weld metal protrudes from the workpiece (first hollow profile 1) into a plug shape and the weld material ( The method of filling and welding the small opening portions 11 of the second hollow profile 2) is collectively called plug welding. Further, when the plate thickness of the aluminum alloy member to be welded is about 3 mm or less as in this embodiment, the opening as described above is omitted, and plug welding is performed by melting off the plate thickness by a welding arc. It can be carried out. An aluminum alloy fusion welding method suitable for the present invention is a conventional TI alloy.
G, MIG and their respective spot welds. MIG spot welding is the simplest in plug welding to a circular hole, and MIG or TIG welding is applied to plug welding, linear butt welding, and fillet welding to a long hole. TIG welding is suitable when the thickness of the material to be welded is about 3 mm or less, or when it is desired to improve the appearance of the welding line.

[0013]

Embodiment 2 FIG. 2 shows an embodiment of the present invention for a hollow section having an irregular cross section. The cross section of the first hollow profile 1 is a square having an outer shape of 60 mm on a side and a thickness of 3 mm.
The cross section of the second hollow member 2 is trapezoidal, and the outer shape is 80 m on the upper side.
m, a lower side 60 mm, a height 80 mm, a horizontal rib 8 at the center in the height direction, and all the thicknesses are 3 mm. Since the height of the first hollow profile 1 is lower than the height of the second hollow profile 2, if the side surfaces of the first hollow profile 1 are processed into plate-like projections 3, 3, the height of the second hollow profile 2 The upper and lower surfaces of the hollow portion 12 cannot be brought into contact.
Also, it is desired to increase the thickness of the partition wall in order to increase the bonding strength and rigidity. For these reasons, the plate-like projections 3 at the end of the first hollow member 1 are separate members processed from a plate having a thickness of 6 mm. The plate-like projections 3, 3 are inserted into the second hollow profile 2 so that the end faces 5, 5 of the plate-like projections 3, 3 of the second hollow profile 2 abut on the inner wall around the hollow portion 12. Processed
In addition, there is a notch 13 for avoiding the lateral rib 8 of the second hollow section 2. The end of the first hollow profile 1 was cut obliquely so as to match the inclination of the side surface of the second hollow profile 2, and two of the plate-like projections 3, 3 were TIG-welded to both side surfaces. On the joint surface of the second hollow member 2, four slit-shaped openings 4, 4 into which the plate-like projections 3, 3 are inserted while avoiding the horizontal ribs 8, are provided. In the plug welding, MIG was used to weld a circular hole having a diameter of 4 mm at 12 places similar to those in the example of FIG.
In addition, a joining line (four sides of a rectangle) between the first hollow profile 1 and the second hollow profile 2 was TIG-welded.

In this embodiment, as long as the design requirements of the joint portion are satisfied, the joining of the plate-like projections 3, 3 and the first hollow profile 1 can be mechanical joining, adhesive joining, or a combination thereof. If it is reasonable in view of the assembly sequence of the entire skeleton, the plate-like projections 3, 3 are first locked to the second hollow profile 2, welded or temporarily fixed, and then connected to the first hollow profile 1. The plate-like projections 3, 3 can be joined.

[0015]

Embodiment 3 FIG. 3 shows an embodiment of the present invention in connection of three hollow sections orthogonal to each other. The three hollow profiles have the same cross section, the outer shape is a square with a side of 60 mm, and the thickness is 3 mm. An integrally formed plate-like projection 3a for sealing the end of the second hollow profile 2 is provided at the end of the first hollow profile 1.
And a plate-like projection 3 made of another thick member serving as a partition wall of the hollow portion of the second hollow profile 2, and the hollow portion 12 of the second hollow profile 2 is provided at an end of the third hollow profile 9. The plate-like projections 3, 3 formed of two thick separate members to be the partition walls are provided. The positions where the three plate-like projections 3 were inserted were adjusted so as not to interfere with each other. Each of the plate-shaped projections 3, 3
Are provided with three slit-shaped opening portions 4, 4 into which are inserted, and circular holes 15 for plug welding the end surfaces 5, 5 of the respective plate-shaped projections 3, 3. First, the plate-like projections 3 of the third hollow member 9 are inserted into the second hollow member 2 and plug-welded, and then the plate-like projections 3 of the first hollow member 1 are connected to the second hollow member 2. , And plug-welded, and the plate-shaped projection 3a of the first hollow member 1 is inserted.
Welding to seal the end surface of the second hollow profile 2 was performed. Finally, a joining line between the third hollow profile 9 and the second hollow profile 2,
The joining line between the first hollow profile 1 and the second hollow profile 2 was butt-welded or fillet-welded.

[0016]

Embodiment 4 FIG. 4 shows an embodiment of the present invention for T-shaped joining of an extruded round tube hollow member having an outer diameter of 50 mm and a thickness of 3 mm. The end of the first hollow section 1 is cut to just fit the cylindrical wall 14 of the second hollow section 2 and the tip has a radius of 22 m.
A plate-shaped projection 3 having a thickness of 6 mm and processed into a semicircular shape of m was welded so as to form a vertical rib passing through the center of the cross section of the first hollow profile 1. The cylindrical wall 14 at the joint of the second hollow profile 2 has a width of 6
mm, a slit-shaped opening 4 with a semicircle cut out is provided,
Three circular holes 15, 15 were provided in the cylindrical wall 14 facing the slit-shaped opening 4. Plate-like projection 3 of first hollow member 1
Is inserted into the slit-shaped opening 4 of the second hollow member 2, and the end surfaces 5, 5 of the semicircular portions of the plate-like projections 3 are brought into contact with the inner wall of the second hollow member 2, thereby forming three circles. The holes 15, 15 were plug-welded. Also, the joining line between the first hollow profile 1 and the second hollow profile 2 was fillet welded.

[0017]

Embodiment 5 FIG. 5 is the same as FIG.
1 shows an embodiment of the invention for T-joining of extruded round tubular hollow sections of mm. The end of the first hollow section 1 was cut at right angles to the longitudinal direction. One end has a square cross section of 52 mm on a side and has a 50 mm diameter circular hole at the center, and the other end has a radius of 2 mm.
A connection node member having two plate-shaped protrusions 3 and 6 having a thickness of 6 mm and processed into a semicircular shape of 2 mm is prepared, and has a diameter of 50 m.
The end of the first hollow member 1 was inserted into a circular hole of m and welded.
The cylindrical wall 14 at the joint of the second hollow member 2 is provided with two slit-shaped openings 4 having a width of 6 mm and notched by a semicircle. Provided three circular holes 15 and 15, respectively. The two plate-like projections 3, 3 at the tip of the coupling node joined to the end of the first hollow profile 1
It is inserted into the two slit-shaped opening portions 4, 4 of the second hollow profile 2, and the end surfaces 5, 5 of the semicircular portions of the plate-like projections 3, 3 are brought into contact with the inner wall of the second hollow profile 2. Then, the six circular holes 15 were plug-welded. Also, the joining line between the joining node and the second hollow member 2 was fillet welded. In this embodiment, while the shape of the connection node is slightly complicated, complicated processing and joining for the end face of the profile can be omitted, and the functionality can be increased by processing the mounting holes of other members on the connection node. it can.

[0018]

According to the present invention, a plate-like projection is provided at an end of the first hollow member 1 and the plate-like projection is inserted into an insertion hole provided on a side wall of the second hollow member 2. Since a partition wall is provided in the hollow portion of the second hollow profile 2 and the abutting portion of the plate-like projection is welded, a relatively easy and inexpensive processing means and a lightweight and highly rigid joint portion with a minimum number of parts can be provided. There is an effect that can be formed.

[Brief description of the drawings]

FIG. 1 shows a hollow profile used in an embodiment of the present invention (a).
FIG. 3 is a partial perspective view before joining, with a part cut off, and FIG.

FIG. 2 is a partially cutaway perspective view of a hollow profile used in another embodiment before joining.

FIG. 3 is a perspective view in which a part of a hollow shape member used in an example of three-way joining is cut off before joining.

FIG. 4 is a partially cutaway perspective view of a hollow section used in the embodiment having a circular cross section before joining.

FIG. 5 is a partially cutaway perspective view of a hollow member used in an embodiment having a connecting node member before being joined.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 first hollow profile 2 second hollow profile 3, 3 a plate-like projection 4 slit-shaped opening 5 end face 6 joining line 7 joining line 8 horizontal rib 9 third hollow profile 10 partition door 11 small opening 12 Hollow part 13 Notch 14 Cylindrical wall 15 Circular hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaru Okudo 655-8 Sano, Susono City, Shizuoka Prefecture (72) Inventor Isamu Hirono 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Invention Person Yusuke Kondo 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Hidenori Ugi 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Hideki Komori 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation

Claims (6)

[Claims] 1. A joining apparatus for joining an end of a first hollow profile to a side wall of a second hollow profile, wherein a plate-like projection at an end of the first hollow profile is inserted into an insertion hole in a side wall of a second hollow profile. Wherein the plate-shaped projection and the second hollow member are welded to each other. 2. A method of joining an end of a first hollow section to a side wall of a second hollow section, wherein a plate-like projection provided at an end of the first hollow section is provided on a side wall of the second hollow section. The end face of the plate-shaped projection is brought into contact with the inner side wall of the second hollow profile, and the side wall of the second hollow profile at the corresponding contact portion is provided with a welding hole. And welding the plate-like projections to the side wall of the second hollow profile through the joint. 3. The method according to claim 2, wherein all or a part of the end face of the plate-shaped projection is in contact with an inner wall of the second hollow section. 4. The method for joining hollow members according to claim 2, wherein the cross-sectional shapes of the first hollow member and the second hollow member are quadrangular, circular, triangular or other polygonal. 5. The method according to claim 2, wherein the number of the plate-like projections is one to three. 6. The method according to claim 2, wherein the plate-like projection is formed integrally with the end of the first hollow member, or another member is connected by welding or other method. .