JP3330825B2 - Profiles for welded joint frames - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectangular tube-shaped welded joint frame made of aluminum or an aluminum alloy (hereinafter, referred to as an aluminum material).
In particular, the present invention relates to a welded joint frame used for a welded structure forming a body frame of an automobile such as a truck.

[0002]

2. Description of the Related Art Conventionally, an automobile body such as a truck and a vehicle body such as a transportation machine are reinforced by folding an end portion of a formed steel plate and joining the portion by resistance spot welding. The monocoque structure assembled in this manner is a general vehicle body structure such as a truck.

[0003] However, this method has the advantage of being easy to assemble easily, but has many overlapping parts, has a lot of useless parts in structure formation, is not slim, and has a complicated shape of a molded member. However, there is a disadvantage that the weight increases.

[0004] On the other hand, if butt welding is performed by arc welding and beam welding, the structure becomes slim, but the welding quality is greatly affected by the butt accuracy of the members before welding. For example, when a gap is formed between members, welding quality is significantly reduced. Therefore, a jig for holding the member in an assembled state by pressing the member is required, and the member itself requires high-precision machining. Therefore,
It is difficult to automate assembly.

Recently, attempts have been made to manufacture a vehicle body from an aluminum alloy material in order to reduce the weight of the vehicle body. In this case, the aluminum material has low spot weldability, and in a monocoque structure, it is necessary to perform welding at thousands of points, but in that case, there is a disadvantage that the electrode is greatly consumed. Further, there is a disadvantage that the formability of the plate material is worse than that of the aluminum material.

Therefore, a space frame structure has been proposed in which a vehicle such as a truck and a vehicle such as a transport machine is supported by a hollow pipe-shaped frame. FIG. 10 is a schematic diagram showing a space frame structure proposed as applied to a general truck. As shown in FIG. 10, a rectangular cylindrical aluminum material 51 is assembled in the shape of a truck cabin, and the rectangular cylindrical materials 51 are joined to each other by welding, so that the shapes 51 are fixed to each other. As a result, a so-called space frame structure is formed, and a structural plate is attached so as to cover the space frame 50, thereby completing the automobile body.

[0007] When assembling an automobile body frame using this aluminum tubular material, a method has been proposed in which the materials are joined to each other via a knot member manufactured by casting and forging (Japanese Patent Application Laid-Open (JP-A) no. JP-A-60-135375).

[0008]

However, this conventional technique has the disadvantage that the cost of manufacturing is increased because the shape of the knotting member is complicated and the number of parts is increased.

Therefore, the applicant of the present application has proposed a method of manufacturing a welded structure in which profiles are directly welded and joined together without using a knot member (not disclosed: Japanese Patent Application No. 8-143152).
In this technique, in order to obtain a good weld in a state where the sections are directly welded and joined together, the ends of the sections are joined at a symmetrical shape with respect to the welding bead (the sections are joined together). The angle is cut obliquely in accordance with the angle to be formed.

[0010] However, when the end portions of the profiled members are cut obliquely and joined, there are problems in the following work. First, when assembling a frame-shaped frame or the like, it is set by abutting at a predetermined angle and fixed by a clamp or temporarily fixed by welding, but the coupling angle does not easily match the predetermined angle, and the butting portion is easily displaced . For this reason, work takes time and effort.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above-described advantages of a method of manufacturing a welded structure in which profiles are directly welded to each other without using a knot member. An object of the present invention is to provide a shape member for a welded joint frame in which the setting operation of a material can be easily and quickly performed, and the setting workability can be improved.

[0012]

According to a first aspect of the present invention, there is provided a welded joint frame having a rectangular cylindrical shape made of aluminum or an aluminum alloy.
A protruding first side plate, a second side plate parallel to the first side plate, and third and fourth side plates connecting the first side plate and the second side plate and having leading end edges inclined with respect to the longitudinal direction; , The end surface of which is inclined in the longitudinal direction, and a notch is formed at the tip end of the second side plate by end milling.

In the present invention, the profile is formed by inclining the end face, the end faces are butted, and the butted faces are joined by welding. In this case, since a notch is formed in the side plate located on the inner corner side of the butted shape members, a joining member having an angle determining portion inclined at a predetermined angle is engaged with this notch, and both ends are engaged. Connect the profiles. Thereby, while the profile is easily set, the joining member and the profile are welded to each other in a state where the joining member is engaged, so that deformation of the profile during welding can be prevented,
The joining portion is reinforced by the joining member.

In this case, since the notch of the profile is formed by end milling, the notch can be easily formed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be specifically described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a profile for a welded joint frame according to an embodiment of the present invention,
2 is a plan view of the same, FIG. 3 is a cross-sectional view showing a joining member, FIG. 4 is a side view thereof, and FIG. 5 is a front view showing a state where shapes are connected by the joining member of the present embodiment. The first aluminum material profile 1 and the second aluminum material profile 2 in the shape of a rectangular tube are cut with their end surfaces inclined in the longitudinal direction. Then, when the two profiles 1 and 2 abut on each other at their end faces, the profiles 1 and 2 intersect at a predetermined angle (90 ° in the illustrated example). This predetermined angle is the coupling angle. Then, the joining member 11 is attached to the inner corner side plates of the profiles 1 and 2. Note that the inner angle side plate is a side plate of the profiles 1 and 2 that intersects at an angle of 180 ° or less.

That is, as shown in FIG. 1, the profile 1 (2) has an inclined end face 25, a protruding side plate 22, a side plate 21 facing in parallel with the side plate 22, a side plate 21 and a side plate. 22 and a pair of side plates 23 and 24 communicating with each other. The tip edges 25 of the side plates 23 and 24 are linearly inclined from the side plate 21 side to the side plate 22 side. Thus, a cutout 26 is formed in the end of the side plate 21 in the profile 1 (2) of the present embodiment. This notch 2
6 can be formed by moving the end mill from the end of the side plate 21 in the longitudinal direction of the side plate 21. Thus, if the notch 26 is formed by an end mill, the notch 26 can be formed very easily and quickly. When the notch 26 is formed by an end mill, the terminal edge of the notch 26 is curved with the same radius as the radius of the end mill.

The joining member 11 of the present embodiment has an angle determining portion 8 bent at the above-mentioned coupling angle, and the angle determining portion 8 is formed by portions 8a and 8b which follow the inner surfaces of the inner angle side plates of the profiles 1 and 2. Having. Then, the angle determining unit 8 includes the copying portions 8a, 8b
An inner plate 8c which connects between them and bends at 90 ° in the center, and an outer plate 8 which is parallel to this inner plate 8c and which also bends at 90 °
d, a connecting plate 8e for connecting the inner plate 8c and the outer plate 8d at a bent portion at the center thereof, and copying portions 8a, 8b.
Connecting plates 8f and 8g and connecting plates 8h and 8i for connecting the outer plate 8d to the outer plate 8d.

The first and second locking portions 9 and 10 of the joining member 11 extend from the inner plate 8c of the angle determining portion 8 to the tip end side in parallel with the copying portions 8a and 8b. It has a first and a second locking portion 9, 10. That is, each locking portion 9, 1
0 extends from the inner plate 8c of the angle determining portion 8 to its extension,
It extends in the direction of both ends of the angle determining portion 8 and has a surface parallel to the copying portions 8a and 8b of the angle determining portion 8. And
Copying portions 8a, 8b of the locking portions 9, 10 and the angle determining portion 8
The end portions of the inner angle side plates of the profiles 1 and 2 are fitted in the gap between them.

Further, the tips of the locking portions 9 and 10 are connected to each other by a connecting plate 12. Accordingly, the connecting plate 12 intersects the profiles 1 and 2 at an angle of 45 °. The distance between the central portion of the connecting plate 12 and the central bent portion of the inner plate 8c is the second.
The second connecting plate 13 is connected by the connecting plate 13 and thus is located on the extension of the connecting plate 8e.

In this embodiment, the profiles 1 and 2 are set using the joining member 11 configured as described above. That is, as shown in FIG. 5, the inner side plates 21 at the butting ends of the profiles 1 and 2 are connected to the locking portions 9 and 1 of the joining member 11.
Fit into 0. In this case, the profiles 1 and 2 are fitted into the locking portions 9 and 10 deeply until the innermost portion of the notch 26 is near the base end of the locking portion 9. That is, the side plate 21 on the inner angle side of the profiles 1 and 2 is copied to the inner surface of the inner angle side plate 21 by the portion 8.
a, 8b are brought into contact with each other, and the notch 26 of the inner corner side plate 21 is positioned in a region from the branch portion of the locking portions 9, 10 in the joining member 11 to the center bent portion of the inner plate 8c. It fits in the gap between the parts 9, 10 and the copying parts 8a, 8b. As a result, the profiles 1 and 2 are arranged such that their coupling angles coincide with a predetermined angle. Then, the profile 1,2
The butting lines of the side plates 23 and 24 on both sides and the butting lines of the side plates 22 on the outer angle side are welded to each other. Further, on the inner corners of the profiles 1 and 2, the edges of the first and second locking portions 9 and 10 of the joining member 11 and the outer surfaces of the inner corner side plates 21 of the profiles 1 and 2 are welded. Join. Thereby, the profile 1,
2 are joined at a predetermined angle.

In this embodiment, the ends of the profiles 1 and 2 are processed as shown in FIGS.
By using, even if the end surfaces of the profiles 1 and 2 are inclined with respect to the longitudinal direction, both can be easily positioned, and the joint angle of the two can be matched with a predetermined angle with high accuracy. be able to. Moreover, this setting operation is extremely easy. In addition, since the inside corner side plates 21 of the profiles 1 and 2 are supported by the joining member 11,
At the time of welding, the angle formed by the profiles 1 and 2 does not change to the inner angle side. Also, for the inner corner side of the profile,
The conventional fillet welding becomes unnecessary, and since this portion is welded between the edge of the angle determining portion 8 of the joining member 11 and the profiles 1 and 2, a locally weak portion may be generated. Can be prevented, whereby the strength of the joint can be improved.

Further, the angle determining portion 8 comes into contact with the inner surface of the inner angle side plates of the profiles 1 and 2 and follows the inner surface. In this case, connecting plates 8f, 8g are provided on the back surfaces of the copying portions 8a, 8b of the angle determining portion 8.
And the connecting plates 8h, 8i are fixed vertically, and each connecting plate 8f, 8g, 8h, 8i is connected to the outer plate 8 together with the connecting plate 8e.
Since it is fixed at d, the angle determining section 8 of the present embodiment has high rigidity. The angle determining portion 8 is provided with locking portions 9, 10
At the time of welding and joining between the material and the profiles 1 and 2. As described above, since the angle determining portion 8 having high rigidity functions as a backing material, when the shape members 1 and 2 are affected by heat at the time of welding, their deformation is prevented.

Further, a connecting plate 12 connects between the ends of the first and second locking portions 9 and 10, and a connecting plate 13 connects between the connecting plate 12 and the inner plate 8c. And
Since both edges of the connecting plate 12 are welded to the profiles 1 and 2, the connecting plates 12 and 13 function as a reinforcing material for a joint between the profiles 1 and 2.

For this reason, the connecting member 11 is made of
Not only facilitates setting, but also serves as a reinforcing member for the joint, and the rigidity of the angle determining part 8 is high, so that the joint strength of the profiles 1 and 2 is remarkably increased.

As shown in FIG. 1, the joining member 11 has a uniform cross-sectional shape and can be manufactured by extrusion and cutting. The increase in the manufacturing cost of the welded structure is extremely small.

The joining member 11 has a structure in which the angle determining portion 8 follows the inner surfaces of the inner angle side plates of the profiles 1 and 2 and the first and second locking portions 9 and 10 come into contact with the outer surface. . Therefore, the locking portions 9 and 10 are exposed outside the profiles 1 and 2, and the angle determining portion 8 is inside the profiles 1 and 2.

However, the present invention is not limited to the above embodiment, and the shape and structure of the joining member used for setting the profile can be arbitrarily determined. For example, the copying portion 8a of the angle determination unit 8,
8b may follow the outer surface of the inner corner side plate of the profiles 1 and 2 so that the locking portion contacts the inner surface. However, in this case, the connecting plates 9 and 10 functioning as reinforcing members do not connect the ends of the locking portions 9 and 10 but the shape members 1 and
2 is shaped so as to connect the ends of the angle determining portions exposed to the outside. Thereby, when the end portion of the angle determining portion and the outer surface of the profile are welded, the connecting plate to function as a reinforcing member is directly welded to the outer surface of the inner angle side plate of the profile, Functions well as a reinforcing member. In any case, the connecting plate as the reinforcing member is arranged on the inner corner side of the profile.

The shape and dimensions of the reinforcing members (connecting plates 9, 10) can be determined according to the required degree of reinforcement.

[0029]

As described above, according to the present invention,
The sections can be joined at a predetermined design connection angle, and the setting operation is easy. Further, in the present invention, since the joining member and the inner-angle side plate of the profile are welded to each other, welding of the inner-angle portion of the profile, which has been conventionally performed by fillet welding, can be avoided. At the same time, it is possible to prevent the joining angle between the shape members from changing. Further, by avoiding the fillet welding, it is possible to avoid the occurrence of a locally weak portion as a structure, and as a result, it is possible to improve the strength of the entire joint.

In order to obtain such an excellent effect, the shape of the profile can be obtained by forming the notch by inclining the end and forming the end of the inner side plate by an end mill. Therefore, the processing is extremely simple.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a profile according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional view showing a joining member used when joining the profiles of the present embodiment.

FIG. 4 is a side view of the same.

FIG. 5 is a front view showing a state where the profiles are joined together.

FIG. 6 is a diagram showing a space frame structure proposed as a track.

[Explanation of symbols]

 1, 2: Shaped material 8: Angle determining portion 8a, 8b: Copying portion 8c: Inner plate 8d: Outer plate 8e-8i: Connecting plate 9, 10: Locking portion 11: Joining members 21, 22, 23, 24 : Side plate 25: Tip edge 26: Notch

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI // B23K 101: 04 B23K 101: 04 103: 10 103: 10 (72) Inventor Toru Hashimura 1-chome Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Prefecture No.5-5 Kobe Steel, Ltd.Kobe Integrated Technology Laboratory Inspector Masato Kato (56) References JP-A-5-319304 (JP, A) JP-A-62-114792 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) B23K 9/00 B23K 9/23 B23K 33/00 B62D 25/00 B62D 29/00

Claims (1)

(57) [Claims] 1. A welded joint frame formed of aluminum or an aluminum alloy and having a rectangular tubular shape, a first side plate protruding, a second side plate parallel to the first side plate, a first side plate, and a first side plate. A third side plate is connected to the second side plate, and a leading edge of the third side plate is inclined with respect to the longitudinal direction. The end surface is inclined in the longitudinal direction. A shape member for a welded joint frame, wherein a notch is formed by the method.