JP3378150B2 - Joining members for welded structures - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, automobile bodies such as trucks and vehicle bodies such as transport machines are reinforced by folding end portions of formed steel sheets and joining the portions by resistance spot welding. The monocoque structure assembled in this manner is a general vehicle body structure such as a truck.

However, although this method has the advantage that the assembly can be easily automated, it has many overlapping portions, there are considerable wasteful portions in the structure formation, it is not slim, and the shape of the molding member is complicated. However, there is a disadvantage that the weight also increases.

On the other hand, if the butt welding is performed by arc welding and beam welding, the structure becomes slim, but the welding quality is greatly affected by the butt precision of the members before welding. For example, if a gap is formed between the members, the welding quality will be significantly reduced. Therefore, a jig for pressing the members to hold them in the assembled state is required, and the members themselves need to be machined with high precision. Therefore,
Automation of assembly is difficult.

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

Therefore, there has been proposed a space frame structure in which a vehicle body such as an automobile such as a truck and a transportation machine is supported by a hollow pipe-shaped frame. FIG. 13 is a schematic diagram showing a space frame structure proposed to be applied to a general truck. As shown in FIG. 13, a rectangular tubular shaped material 51 made of aluminum is assembled into a shape of a cabin of a truck, and the rectangular tubular shapes 51 are joined by welding to fix the shaped materials 51 to each other. As a result, a so-called space frame structure is formed, and the structural plate is attached so as to cover the space frame 50 to complete the automobile body.

When assembling a body frame of an automobile using the aluminum rectangular tubular shape member, it is necessary to branch a plurality of shape members from one shape member. A method has been proposed in which a joint member manufactured by casting and forging is used for such a joint, and the shape members are joined together via the joint member (Japanese Patent Laid-Open No. 60-135375).

Further, there has been proposed a method of directly connecting the shape members without using the knot member (Japanese Patent Laid-Open No. 6-2.
19321).

[0009]

However, the conventional technique using the knotting member has a drawback that the knotting member has a complicated shape and the number of parts is large, resulting in an increase in manufacturing cost.

Further, in the conventional method of directly joining the shape members together, when a bending member is used for the shape members forming the frame, a dimensional error is likely to occur at the joint portion, and the joint portion is liable to have a dimensional error. Since twisting is likely to occur, it is not easy to make the shape members coincide with each other at the joint when welding and joining.
In addition, since the shape members are directly welded to each other, if it is necessary to branch a plurality of other shape members from one position of the shape member, the heat-affected zone by welding can be placed in one place. Concentrate,
For this reason, the softened part due to the influence of heat is concentrated in one place, and the strength is deteriorated.

The present invention has been made in view of the above problems, and while making the most of the advantage of the method for manufacturing a welded structure in which the shape members are directly welded to each other without using a knot member, the rectangular tubular shape is used. An object of the present invention is to provide a joining member for a welded structure, which can easily and quickly perform the work of setting the material and improve the workability of the setting.

[0012]

A joining member for a welded structure according to the present invention is used for positioning during welding of a welded structure manufactured by welding and joining a rectangular tubular member made of aluminum or an aluminum alloy. In the joining members used,
It has a plurality of fitting portions that have a U-shaped cross section and is formed by a bottom surface and both side surfaces thereof, and that fits the shape members. At least two of the fitting portions have a bottom surface and both side surfaces parallel to each other. It is characterized by In this case, as in claim 3, both side surfaces
They do not have to be parallel, but on the side of each fitting
The bending lines of the surface and the bottom surface are parallel for all mating parts.
It is necessary.

Another welding structure joining member according to the present invention is used for positioning during welding of a welding structure manufactured by welding and joining a rectangular tubular member made of aluminum or an aluminum alloy. in bonding member that has a plurality of fitting portions for fitting the profile forms a U-shaped cross section consisting of a bottom and both side surfaces, at least two, hand side of the fitting portion the other is a side orthogonal, Ri parallel der and one bottom surface and the other side, the side surface and the bottom surface of the fitting portion
The bending lines of and are parallel to all the fitting portions .

In the present invention, the profile is fitted into the fitting portion having a U-shaped cross section, and the side surface of the fitting portion and the outer surface of the profile are welded and joined. Since the joining member of the present invention has a plurality of fitting portions, at least two fitting portions of the joining members are fitted with the respective shape members and welded to each other, so that the shape members are joined to each other through the joining member. Can be combined.

In this case, in the present invention, in at least two fitting portions, the bottom surface and both side surfaces are parallel to each other (claim 1), or one side surface and the other side surface are straight.
Interlink with its bending one bottom surface and the other side is a parallel
Or curves are parallel (claim 2), or the bottom surface to each other Rights
Rows whose bending lines are parallel (claim 3) . Therefore, the cross-sectional shape of the joining member of the present invention can be made uniform in the longitudinal direction of the line where the bottom surface and the side surface bend, in other words, for all fitting parts, the bottom surface and the side surface are The bending lines are formed so that they are parallel to each other.
It Therefore, the joining member of the present invention can be manufactured by extrusion molding, and the manufacturing cost thereof is extremely low as compared with the case where the joining member is manufactured by casting and forging.

If the relative positions of the two fitting portions are set in correspondence with the joining angles of the joining portions of the two profile members, the profile members in the twisted position can be joined together. It is possible, and it is easy to set the profile before welding.

Since the joining member of the present invention has a shape in which the shape members are sandwiched on both side surfaces, it also functions as a reinforcing member for the joint portion of the shape members.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
A detailed description will be given with reference to the accompanying drawings. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a left side view of the same, and FIG. 4 is a sectional view taken along the line AA of FIG. Each of the shape members 1, 2 and 3 is in the shape of a rectangular tube, and in particular, the shape member 1 has a central plate 1a connecting the side surfaces at the center of the cross section so that the cross section has a "day" shape. The sections 2 and 3 have a square cross section. Also, profile 1
Has a rectangular hole 1b formed in its upper plate.
The profile 3 is inserted in the b.

The joining member 9 of this embodiment has two fitting portions 10 and 16. The bottom plate 11 is a bottom surface of the fitting portion 10,
It also serves as the bottom surface of the fitting portion 16. Then, the side plates 12 and 1 are vertically provided from both ends of the bottom plate 11 to the front surface and the back surface thereof, respectively.
3 and the side plates 14 and 15 extend. The side plate 12 and the side plate 14 are on the same plane, and the side plate 13 and the side plate 15 are on the same plane. Then, the side plates 12, 14 and the side plates 13, 1
It is parallel to 5. Thus, the joining member 9 has a shape in which the fitting portions 10 and 16 having a U-shaped cross section are arranged back to back, and the cross sectional shapes thereof are the bottom plate 11 and the side plates 12, 13, and 1.
It is uniform in the longitudinal direction of the bending line with Nos. 4 and 15. Therefore, the joining member 9 can be manufactured by extrusion molding.

In the joining member 9 thus constructed, the profile 1 is fitted in the fitting part 10 such that the longitudinal direction of the profile 1 is parallel to the bending line of the fitting part 10. On the other hand, the shape member 2 is fitted into the fitting portion 16 such that its longitudinal direction is perpendicular to the bottom plate 11 of the fitting portion 16. Further, the profile 3 is inserted into the hole 1b of the profile 1 with its longitudinal direction perpendicular to the longitudinal direction of the profile 1, and the tip of the profile 3 is brought into contact with the central plate 1a of the profile 1.

After positioning the shape members 1 and 2 using the joining member 9 in this manner, the side plate 1 of the joining member 9 is positioned.
2, 13 and the side plate of the profile 1 are welded and joined along the edges of the side plates 12, 13. Also, the side plate 1 of the joining member 9
4, 15 and the side plate of the shape member 2 are welded to each other along the lower end edges of the side plates 14, 15. Further, the side plate of the shape member 3 and the upper plate of the shape member 1 are welded and joined.

As a result, the profile 1 and the profile 2 are joined together via the joining member 9, and the profile 3 is joined to the profile 1.
In the present embodiment, as described above, the joining member 9 can be manufactured by extrusion molding, so that its manufacturing cost is low. Further, since the shape members 1 and 2 are set using the joining member 9, the setting work is extremely easy.
Furthermore, in the present embodiment, the side plates of the joining member 9 and the side plates of the profile members 1 and 2 are welded and joined to each other instead of directly welding and joining the profile members 1 and 2, so that a portion of the profile member that is affected by heat is affected. Are dispersed, and strength deterioration due to softening is prevented. Furthermore, since the side plates 12 to 15 of the joining member 9 are welded to the side plates of the shape members 1 and 2, a reinforcing effect due to the side plates can be obtained, and compared with the case where the shape members 1 and 2 are directly welded and joined. The strength of the part can be increased.

FIG. 5 is a front view showing a joining member 21 according to a second embodiment of the present invention, FIG. 6 is a plan view of the same, and FIG.
Is also its left side view, and FIG. 8 is its right side view. The joining member 20 of this embodiment has fitting portions 21 and 27 that share the bottom plate 22. This fitting portion 21 is a bottom plate 22.
And side plates 23 and 24 extending vertically from the bottom plate 22 at both ends of the bottom plate 22. The fitting portion 27 is composed of a bottom plate 22 and side plates 25 and 26 extending vertically from the bottom plate 22. And the side plate 23,
25 is the same surface, and the side plates 24 and 26 are the same surface.
The side plates 23 and 25 are parallel to the side plates 24 and 26. Further, the fitting portions 21 and 27 have the same width.

On the other hand, on the outer surface of the side plate 24, the side plates 31 and 3 are provided.
2 extends perpendicular to the side plate 24 and parallel to the bottom plate 22. The side plate 24 and the side plate 3 are used as the bottom face.
The fitting portion 30 is configured by the components 1 and 32.

As described above, the fitting portions 21 and 27 are arranged back to back, and the fitting portion 30 is arranged such that the bottom surfaces and the side surfaces of the fitting portions 21 and 27 are orthogonal to each other. However, the bending lines of the fitting portions 21, 27, 30 are all parallel. Therefore, the joining member of this embodiment can also be manufactured by extrusion molding.

Thus, in this embodiment, FIGS.
As shown in FIG. 3, the profile 1 is fitted into the fitting part 21, the upper surface of the profile 1 is brought into contact with the bottom surface of the fitting part 21, and the profile 2 is fitted into the fitting part 2.
7, the tip end of the shape member 2 is brought into contact with the bottom surface of the fitting portion 27 to be fitted, the shape member 4 is fitted to the fitting portion 30, and the tip end of the shape member 4 is fitted to the fitting portion 3.
The bottom surface of 0 is contacted and fitted.

Then, the side plates 23 and 24 of the fitting portion 21 and the side plate of the profile 1 are joined by welding at the edges of the side plates 23 and 24. In addition, the side plates 25 and 26 of the fitting portion 27 and the fitting portion 3
The side plates 31 and 32 of 0 and the shape member 2 and the shape member 4 are joined by welding at the leading edge of each side plate. As a result, the profile members 2 and the profile members 4 are joined to the profile member 1 so as to be orthogonal to each other. Also in this embodiment, since the side plate of the shape member and the edge of the side plate of the fitting portion are welded, the welding heat affected zone is dispersed and softening by the welding heat affected zone is prevented.

In this embodiment, by appropriately setting the distance between the side plates of the fitting portion in accordance with the lateral dimension or the vertical dimension of the shape members, it is possible to arbitrarily connect the shape members of various sizes. it can.

Even when the two profile members are in a twisted relationship, if the side plate of one fitting portion and the side plate of the other fitting portion are formed not at parallel but at a predetermined angle. Good. However, also in the case of this joining member, when it is manufactured by extrusion molding, it is necessary that the bending lines of the side plate and the bottom plate of each fitting portion are parallel to each other.

FIG. 9 is a front view showing a front frame structure for a vehicle body according to a third embodiment of the present invention, FIG. 10 is its plan view, FIG. 11 is its rear view, and FIG. 12 is a left side view.
In the joining member 40 of the present embodiment, as shown in FIG. 10, a U-shaped fitting portion 41 and a fitting portion 42 in a plan view are connected by a pair of vertical plate-shaped beams 43a and 43b. There is. Beam 43a is shorter than beam 43b, so
The fitting portion 41 and the fitting portion 42 are not parallel in the depth direction but slightly different. In addition, as shown in FIG. 9, the fitting portions 41 and 42 and the beams 43a and 43b are not included in the fitting portion 41.
Is inclined so as to rise toward the fitting portion 42 from
The fitting portion 42 is higher than the fitting portion 41. The cross beam 44 is connected to one end of the beam 43a,
The other end of the beam 43b is connected diagonally. This cross beam 44 causes the beam 43a,
The strength of 43b is improved, and the bonding strength of the shape members can be increased.

In the joining member 40 having such a structure, the joining member 40 is fitted by contacting the side surface of the shaping member 47 with the bottom surface of the fitting portion 42 with the shaping member 47 extending slightly curved in the vertical direction. The fitting portion 42 is fitted from the side. Further, the horizontally extending shape member 46 is used as the fitting portion 41 and the tip end surface thereof is used as the fitting portion 4.
The bottom surface of 1 is brought into contact with and fitted. Then, the fitting portion 41,
The side plate of 42 and the side plates of the shape members 46 and 47 are fixed by welding. Further, the horizontally extending shape member 48 is arranged such that its upper surface is in contact with the lower surface of the tip end portion of the shape member 46 and one side surface of the shape member 48 is in contact with the bottom surface of the fitting portion 41.
And the bottom plate of the fitting portion 41 by welding.

As a result, the shape members 46, 47 and 48 can be fixed to each other. Also in this embodiment, the bending lines of the bottom plate and the side plates of the fitting portion are parallel to each other. Therefore, the joining member 40 can also be manufactured by extrusion molding.

In this embodiment, the profile 47 and the profile 46 are provided.
And are in a relation of being substantially vertical and twisted. Thus, by adjusting variously the direction of the fitting portion under the condition that the bending lines are parallel to each other, it is possible to join the shape members in an arbitrary manner.

The joining member of each of the above embodiments has a uniform cross-sectional shape, as shown in FIGS. 3, 5 and 10, and therefore can be manufactured by extrusion and cutting. The increase in the manufacturing cost of the welded structure by using the joining member is extremely small.

[0035]

As described above, according to the present invention,
Shapes can be joined at a specified design connection angle,
It is possible to join shapes that are in a twisted relationship to each other, and the setting work is easy. Further, in the present invention, since the side plate of the fitting portion and the side plate of the shape member are welded and joined, compared to the case of directly welding the shape members together, it is possible to prevent the welding heat affected zone from concentrating. The side plate of the fitting portion reinforces the joint, and the reliability of the joint is improved.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a left side view of the same.

FIG. 4 is a sectional view taken along line AA of FIG.

FIG. 5 is a front view showing a second embodiment of the present invention.

FIG. 6 is a plan view of the same.

FIG. 7 is a left side view of the same.

FIG. 8 is a right side view of the same.

FIG. 9 is a front view showing a third embodiment of the present invention.

FIG. 10 is a plan view of the same.

FIG. 11 is a rear view of the same.

FIG. 12 is a left side view of the same.

FIG. 13 is a diagram showing a space frame structure of a track.

[Explanation of symbols]

1, 2, 3, 4, 46, 47, 48: Shape members 9, 20, 40: Joining members 10, 16, 21, 27, 30, 41, 42: Fitting portion 11, 22: Bottom plates 12, 13 , 14, 15, 23, 24, 25, 26, 3
1, 32: Side plates 43a, 43b, 44: Beam

Front page continuation (51) Int.Cl. ⁷ Identification symbol FI // B23K 103: 10 B23K 103: 10 (72) Inventor Toru Hashimura 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel Works, Ltd. Kobe Research Institute (56) References JP-A-51-151637 (JP, A) JP-A-7-233806 (JP, A) Actual development Shou-51-126011 (JP, U) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B23K 37/04

Claims (3)

(57) [Claims] 1. A joining member used for positioning at the time of welding of a welded structure manufactured by welding and joining a rectangular tubular member made of aluminum or an aluminum alloy. A welded structure having a plurality of fitting portions which have a V shape and fit the shape members, and at least two of the fitting portions have a bottom surface and both side surfaces which are parallel to each other. Member for joining. 2. A joining member used for positioning at the time of welding of a welded structure manufactured by welding and joining a rectangular tubular member made of aluminum or an aluminum alloy. None the shape has a plurality of fitting portions for fitting the profile, at least two of said fitting portion, and perpendicular to the side surface and the other side of the hand is, one bottom and the other sides and parallel der is, the side surface of the fitting portion
A member for joining a welded structure, wherein the bending line with the bottom surface is parallel to all fitting portions . 3. A joining member used for positioning during welding of a welded structure manufactured by welding and joining a rectangular tubular member made of aluminum or an aluminum alloy, and a cross-section member consisting of a bottom surface and both side surfaces thereof. None the shape has a plurality of fitting portions for fitting the profile, at least two of said fitting portion includes a bottom surface Ri parallel der mutually side of the fitting portion
A member for joining a welded structure, wherein the bending line between the bottom surface and the bottom surface is parallel to all fitting portions .