JPH1080793A - Joining member for welding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining member that facilitates as well as quickens the setting operation for a square cylindrical shape material and that improves the setting operability while the advantage of the manufacture for a welding structure is utilized in which shape materials are directly joined to each other without using a nodular member. SOLUTION: The joining member 7 is used for positioning in abutting and welding the end faces of a first and a second square cylindrical shape materials 1, 2 composed of aluminum or aluminum alloys. This joining member 7 is provided with an angle determining part 8 having a part 8a, 8b for profiling the inner face of side plates that cross each other with an angle less than 180 deg. formed when the shape materials 1, 2 are abutted on at a prescribed angle, and also provided with a first and second engaging parts 9, 10 branching and extending from the angle determining part 8 so as to hold and restrain the first and second shape materials 1, 2 each between the engaging part 9, 10 and the profiling part 8a, 8b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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, there is a disadvantage that the work requires 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 joining member for a welded structure that can facilitate and quickly set a material and improve the setting workability.

[0012]

A joining member for a welded structure according to the present invention comprises an end face of a first rectangular cylindrical member made of aluminum or aluminum alloy and a second rectangular cylindrical member made of aluminum or aluminum alloy. In the joining member used for positioning at the time of welding of a welded structure manufactured by welding the butted portion to the end face of the material, the first rectangular cylindrical material and the second rectangular cylindrical material are used. An angle determining portion that follows the outer surface or inner surface of the side plate that intersects at an angle of 180 ° or less when abutted at a predetermined angle, and an extending angle determining portion that branches off from the angle determining portion, respectively. The first
And first and second locking portions for locking the second rectangular tubular member therebetween.

In the present invention, the first rectangular cylindrical member and the second
When the rectangular cylindrical member is fitted into the first and second locking portions and abutted, respectively, the first rectangular cylindrical member and the second rectangular cylindrical member are joined by the angle determining portion at the joining angle ( Angle) is determined and arranged. As described above, since the setting of the first and second rectangular tubular members is completed simply by fitting the first and second rectangular tubular members into the locking portions, the setting operation is extremely easy. Also, at the time of welding and joining the first and second rectangular tubular members,
The two members are likely to be deformed by the welding heat, but since the two members are positioned by the joining member of the present invention, the deformation is prevented.

[0014]

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 view showing a first embodiment of the present invention, wherein (a) is a perspective view,
(B) is a sectional view. 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 against each other at their end faces, the profiles 1 and 2 intersect at a predetermined angle. This predetermined angle is the coupling angle.

The joining member 3 according to the present embodiment includes a strip-shaped angle determining portion 4 bent at the above-mentioned coupling angle, and the angle determining portion 4.
First and second locking portions 5 and 6 extending from both ends in the direction of both ends
And The angle determining portion 4 has an outer surface of a side plate that intersects the profiles 1 and 2 at an angle of 180 ° or less, that is, a surface applied to and imitated on an outer surface of an inner angle side plate of the profile. On the other hand, each of the locking portions 5 and 6 extends in an L-shape from the angle determining portion 4 toward both ends of the angle determining portion 4 and has a surface parallel to the angle determining portion 4. The ends of the inner angle side plates of the profiles 1 and 2 are fitted in the gaps between the locking portions 5 and 6 and the angle determining portion 4.

Using the joining member 3 thus constructed, the butted ends of the profiles 1 and 2 are fitted into the locking portions 5 and 6 of the joining member 3 as shown in FIG. As a result, the profiles 1 and 2 are arranged such that their coupling angles coincide with a predetermined angle. Therefore, the butting lines on both sides of the profiles 1 and 2 and the butting lines on the outer corners are welded and joined. On the inner corners of the profiles 1 and 2, the four edges of the angle determining portion 4 of the joining member 3 and the outer surfaces of the inner angle side plates of the profiles 1 and 2 are welded. Thereby, the profiles 1 and 2 are joined at a predetermined angle.

In the present embodiment, by using the joining member 3, even if the end surfaces of the profiles 1 and 2 are inclined with respect to the longitudinal direction, they can be easily positioned, and The coupling angle between the two can be made to coincide with the predetermined angle with high accuracy. Moreover, this setting operation is extremely easy. Further, since the inner sides of the profiles 1 and 2 are supported by the joining member 3, the angle formed by the profiles 1 and 2 does not change to the inner side during welding. Further, the fillet welding as in the related art is not required for the inner corner side portion of the profile, and since this portion is welded between the edge of the angle determining portion 4 of the joining member 3 and the profile,
It is possible to prevent a locally weak portion from being generated, thereby improving the strength of the joint.

Next, a second embodiment of the present invention will be described with reference to the sectional view of FIG. 2 and the plan view of FIG. The joining member 7 according to the present embodiment includes an angle determining portion 8 having portions 8a and 8b that follow the inner surfaces of the inner angle side plates of the profiles 1 and 2, and extending in the longitudinal direction of the joining member 7 from the copying portions 8a and 8b. The first to issue
And second locking portions 9 and 10. The joining member 7 of the present embodiment includes an inner plate 8c that connects the copying portions 8a and 8b.
An outer plate 8d parallel to the inner plate 8c, a connecting plate 8e for connecting the inner plate 8c and the outer plate 8d at the center thereof, and a connection for connecting the copying portions 8a and 8b and the outer plate 8d. It has plates 8f and 8g and connecting plates 8h and 8i.

In the present embodiment, the joining ends of the inner-angle side plates of the profiles 1 and 2 are copied to the inner surface of the inner-angle side plates.
a, 8b are brought into contact with each other, so that the locking portions 9, 10 and the copying portion 8
a, 8b. FIG. 3 shows this profile 1,
FIG. 2 is a view showing a state where the members 2 are connected using a joining member 3. Thereby, the profiles 1 and 2 are arranged at a predetermined coupling angle. After that, the edges of the locking portions 9 and 10 and the profile 1,
2 is welded to the inner angle side plate, and the joining lines of the side plates of the profiles 1 and 2 and the outer angle side plate are welded.

In the present embodiment, the angle determining portion 8 comes into contact with and follows the inner surface of the inner angle side plates of the profiles 1 and 2. In this case, connecting plates 8f, 8g and connecting plates 8h, 8i are vertically fixed to the back surface of the copying portions 8a, 8b of the angle determining unit 8, and each connecting plate 8f, 8g, 8h, 8i is connected to the connecting plate 8e
At the same time, since it is fixed to the outer plate 8d, the rigidity of the angle determining portion 8 of this embodiment is high. For this reason, when affected by heat at the time of welding, the deformation is prevented.

FIG. 6 shows a welded portion in the case of the embodiment shown in FIG. In the welded portion 11, the side plate of the profile is softened by the influence of heat, and the softened portion 12 is easily generated. However, if the angle determining portion 8 has a highly rigid structure as in the present embodiment shown in FIGS. 2 to 4, the joining member 7 itself is reinforced and hardly deformed, and As shown in
The heat of the welded portion 11 escapes through the connecting plates 8f to 8i, and the heat-affected zone on the sections 1 and 2 becomes small, so that softening thereof is prevented. It is needless to say that this embodiment also has the same effect as the embodiment shown in FIG.

Next, a third embodiment of the present invention will be described with reference to FIGS.
An example will be described. 7 is a cross-sectional view, FIG. 8 is a side view, and FIG. 9 is a view showing a state where the profile members are joined. In FIGS. 7 to 9, those having the same functions as those in FIGS. A detailed description of the lever is omitted. In the present embodiment, the profiles 1 and 2 intersect at 90 °. The joining member 11 of the present embodiment is the inner plate 8 c of the angle determining unit 8.
And the outer plate 8d are bent vertically.

As described above, the joining member 11 of the present embodiment can easily position the profiles 1 and 2 similarly to the second embodiment, and can reliably prevent deformation during welding. Can avoid the heat effect.

The joining members of the above embodiments are shown in FIGS.
As shown in FIG. 5, since the cross-sectional shape is uniform and can be manufactured by extrusion and cutting, the increase in the manufacturing cost of the welded structure due to the use of this joining member is extremely small.

[0025]

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.

Further, as the structure of the angle determining section, a high rigidity structure having a connecting plate or the like is provided and the joining member is reinforced, so that the softening of the profile due to the influence of welding heat can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a front view showing a state where the profiles are joined together.

FIG. 5 is a diagram illustrating the effect of the present embodiment.

FIG. 6 is a diagram illustrating the effect of the present embodiment.

FIG. 7 is a sectional view showing a third embodiment of the present invention.

FIG. 8 is a side view of the same.

FIG. 9 is a front view showing a state where the profiles are joined together.

FIG. 10 shows a proposed space frame structure for a track.

[Explanation of symbols]

 1, 2: Shaped material 3, 7, 13: Joining member 4, 8: Angle determining part 5, 6, 9, 10: Locking part 11: Welding part 12: Softening part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tohru Hashimura 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel, Ltd. Kobe Research Institute

Claims (1)

[Claims] 1. A weld manufactured by abutting an end surface of a first rectangular cylindrical member made of aluminum or an aluminum alloy with an end surface of a second rectangular cylindrical member made of an aluminum or aluminum alloy, and welding the butt portion. In a joining member used for positioning of a structure at the time of welding, the first member
When the rectangular tubular member and the second rectangular tubular member abut against each other at a predetermined angle, the angle determining portion follows the outer surface or the inner surface of the side plate intersecting at an angle of 180 ° or less, and the angle determining portion And a first and a second locking portion for holding the first and second rectangular tubular members with the first and second rectangular tubular members sandwiched between the first and second rectangular shape members, respectively. A member for joining the body.