JP4626987B2 - Joining material - Google Patents

Description

  The present invention relates to a joining member used for joining a welded structure that forms a body frame or the like of an automobile such as a truck by welding square-shaped members made of an aluminum alloy.

  Conventionally, automobiles such as trucks and vehicle bodies such as transportation machines are formed by stacking formed steel plate ends and joining the parts by resistance spot welding. The monocoque structure assembled in this way is a general vehicle body structure such as a truck.

  However, although this method has the advantage of easy assembly automation, there are many overlapping parts, there are many wasteful parts in forming the structure, and in addition to being slim, the shape of the molded member is complicated and heavy. There is a disadvantage that an increase also occurs.

  On the other hand, if the vehicle body is assembled by butt welding the frames by arc welding or beam welding, the structure becomes slim, but the butt accuracy of the frames before welding greatly affects the welding quality. For example, if a gap is generated between the frames, the weld quality is significantly reduced. For this reason, a jig for holding the frame and holding it in an assembled state is necessary, and the frame itself needs to be machined with high accuracy. Therefore, it is difficult to automate assembly.

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

  Therefore, a space frame structure has been proposed in which a hollow pipe-like frame is applied to a vehicle such as a truck and a vehicle body such as a transport aircraft. FIG. 16 is a schematic diagram showing a space frame structure proposed for use in a general track. As shown in FIG. 16, square tubular aluminum alloy shaped members 51 are assembled into the shape of a truck cabin, and the square tubular members 51 are joined together by welding to secure the members 51 together. . Thus, 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.

  In the case of assembling a vehicle body frame using this aluminum alloy square tube-shaped member, there has been proposed a method of connecting the members to each other through a knot member manufactured by casting forging (Patent Document 1: JP-A-60-135375).

  Further, a method of directly joining the shape members without using this knot member has also been proposed (Patent Document 2: JP-A-6-219321).

JP-A-60-135375 JP-A-6-219321

  However, in the prior art using a knot member, the shape of the knot member is complicated, and the number of parts increases, so that there is a disadvantage that the manufacturing cost increases.

  In addition, in the conventional method of directly joining the shape members, when a bending member is used for the shape members constituting the frame, a dimensional error is likely to occur in the joint portion, and a twist occurs in the joint portion. Therefore, it is not easy to match the shape members at the joint when welding. In addition, since the profiles are directly welded to each other, when it is necessary to branch a plurality of other profiles from one location on the profile, the heat-affected zone due to welding is reduced to one location. As a result, the softened part due to the heat effect is concentrated in one place, and the strength is deteriorated.

  Therefore, the inventors of the present application have proposed a joining member for easily setting the frames without using a knot member produced by cast forging (Japanese Patent Application No. 8-237024). FIG. 14 is a cross-sectional view showing a joining member according to the technique of Japanese Patent Application No. 8-237024. In this technology, a pair of fitting portions 32 and 33 for fitting a frame is formed on the bottom surface and both side surfaces thereof, and a pair of fitting portions 32 and 33 for fitting the frame are provided on the joining member. Both side surfaces are parallel to each other.

  However, when this joining member is used to join the frames in a straight line, it is necessary to fix both frames following the inner surface of one of the fitting portions, so the setting work is complicated. . On the other hand, when the frame is not fixed, there is a fitting tolerance between the frame and the joining member, so that there is a problem that the dimensional accuracy when the welded structure is assembled is lowered. FIG. 15 is a perspective view showing welding joining using a joining member according to the technique of Japanese Patent Application No. 8-237024. In addition, when this joining member is used, a portion where the edge of the side surface is in contact with the frame can be welded, but the side or bottom surface of the joining member in the fitting portions 32 and 33 There is also a problem that the portion that contacts the frame cannot be welded.

  The present invention has been made in view of such a problem, and while utilizing the advantages of a manufacturing method of a welded structure in which shapes are directly welded to each other without using a knot member manufactured by casting forging, It is an object of the present invention to provide a joining member that can easily and quickly set a cylindrical shape member, improve the setting workability, reduce the fitting tolerance, and increase the welding area.

The joining member according to the present invention is a joining member used for positioning at the time of welding of a welded structure manufactured by welding and joining square tubular shapes made of an aluminum alloy. A pair of side walls having one surface extending in the opposite direction, a connecting portion communicating between the pair of side walls, and a boundary between each side wall and the connecting portion, respectively, with respect to the one surface of each side wall A pair of contact plates having contact surfaces extending inclinedly at an acute angle or an obtuse angle are integrally formed, and a pair of connecting portions are constituted by the side walls and the corresponding contact plates. And the contact surface of the profile is in contact with the contact surface of the connecting portion, and the side surface adjacent to the contact surface of the profile is in contact with the one surface of the side wall, thereby positioning at the time of welding. It is what is used.

  In the present invention, since there is only one pair of side walls extending in opposite directions from the connecting portion, it can be easily positioned by pressing a pair of profiles against the bent portion of the connecting portion and the side wall, The range that the welding torch can reach is wide and the welding area can be increased. For this reason, the dimensional accuracy of the welded structure manufactured by welding these shape members can be increased.

  The profile contact surface may be inclined so that an obtuse angle is formed with respect to the side wall inner surface.

  By inclining the shape contact surface to the inner surface of the side wall at an obtuse angle, the range in which the welding torch reaches can be increased and the welding area can be increased.

  According to the present invention, the shape members can be set very easily. Further, in the present invention, since the connecting portion or the side wall of the profile and the side surface of the other profile are welded together, the weld heat affected zone is concentrated as compared with the case of directly welding the profiles. While being able to prevent, a junction part is reinforced by the side wall of this connection part, and the reliability of a junction part improves. Furthermore, by using one side wall that contacts one shape member, the range in which the welding torch reaches can be widened, and the welding area can be increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing a joining member according to a first embodiment of the present invention. In the joining member 11 of the present embodiment, a pair of side walls 16 and 17 are arranged in parallel. In addition, a pair of connections is made so that the angle formed between the inner surface of the side wall 16 and the surface on the side in contact with the profile is an acute angle, and the angle formed between the inner surface of the side wall 17 and the surface on the side in contact with the profile is an obtuse angle. Plates 14 and 15 are arranged. Thereby, a pair of connecting portions 12 and 13 to which the shape members 1 and 2 are connected are formed. Since the connecting portions 12 and 13 configured in this way have a uniform cross-sectional shape in the longitudinal direction of the bending lines between the connecting plates 14 and 15 and the side walls 16 and 17, they can be manufactured by extrusion molding.

  2A and 2B are diagrams showing a shape member, where FIG. 2A is a front view and FIG. 2B is a side view. The shape members 1 and 2 to be joined by the joining member configured as described above are processed into a shape in which end portions thereof are inclined with respect to the longitudinal direction by cutting or the like. That is, the joint end is processed so as to have an angle formed by the inner surface of the side wall 16 and the contact surface of the connecting plate 14 or 15 with the shape of the connecting plate 14 or 15, and the sharp end is chamfered.

  When the side surfaces of the shape members 1 and 2 on the side having the pointed ends are inserted into the connecting portions 12 and 13 along the inner surface of the side wall 16, the pointed end portions of the shape members 1 form an acute angle between the connecting plate 14 and the side wall 16. A side surface fixed to the bent portion and having a pointed portion follows the inner surface of the side wall 16. Similarly, for the profile 2, the side surface having the pointed portion follows the inner surface of the side wall 16.

  Thus, after positioning the shape 1 and the shape 2 in a straight line through the joining member 11, the side wall 16 of the joining member 11 and the shapes 1 and 2 are aligned along the edge of the side wall 16. The side wall 17 and the profiles 1 and 2 are welded together in the same manner.

  In this embodiment, as described above, since the joining member 11 can be manufactured by extrusion molding, the manufacturing cost is low. In addition, since the sharp ends of the shape members 1 and 2 are fitted and set to the acute bent portion of the joining member 11, the shape member 1 and the shape member 2 can be set in a straight line very easily. For this reason, the dimensional accuracy of the welded structure constituted by the shape member and the joining member is high. Further, in this embodiment, the shape 1 and the shape 2 are not directly welded and joined, but the side wall of the joining member 11 and the side surfaces of the shapes 1 and 2 are welded and joined. The part which receives is disperse | distributed and the strength degradation by softening is prevented. Furthermore, since the side walls 16 and 17 of the joining member 11 are welded to the side surfaces of the profiles 1 and 2, a reinforcing effect by the side walls can be obtained, and compared with the case where the profiles 1 and 2 are directly welded. The strength of the part can be increased.

  FIG. 3 is a sectional view showing a joining member according to a second embodiment of the present invention. In the joining member 21 of the present embodiment, an upper plate 22 and a lower plate 23 having a width wider than the upper plate 22 are disposed in parallel to each other. And the connection plates 24 and 25 which have a shape contact surface are provided so that the edge part of the upper board 22 and the edge part of the lower board 23 may be connected. Further, a connecting portion is formed by providing a connecting plate 26 that connects the central portion of the upper plate 22 and the central portion of the lower plate 23. A pair of side walls 27 and 28 extending in opposite directions in parallel to the lower plate 23 are formed from the end where the connecting plate 24 or 25 and the lower plate 23 are connected.

  The shape members 3 and 4 to be joined by the joining member configured as described above are processed into a shape in which an end portion is inclined with respect to the longitudinal direction, for example, similarly to the shape members 1 and 2 described above. In this case, it is processed so as to have an angle (obtuse angle) formed by the inner surface of the side wall and the shape contact surfaces of the connecting plates 24 and 25. In addition, the chamfer is not given to the point part of the shape members 3 and 4.

  FIG. 4 is a perspective view showing a joining state when a pair of profiles are joined in a straight line using the joining member according to the second embodiment. In the present embodiment, after the shape member 3 and the shape member 4 are positioned in a straight line via the joining member 21, the joining member 21 and the shape member 3 are aligned with the edge of the side wall 27, the inner surface of the side wall 27 and the shape. The joining member 21 and the shape member 4 are welded and joined together by welding along the butt line with the side surface of the material 3 and the butt line between the connecting plate 24 and the end portion of the shape member 3.

  In the present embodiment, since the end portions of the shape members 3 and 4 that are bent at an obtuse angle are fitted and set to the obtuse angle bent portion of the joining member 21, the shape member 3 and the shape member 4 are aligned very easily. Can be set to the shape. Further, since one side wall is in contact with one shape member and the bent portion has an obtuse angle, it is easy to insert the welding torch into the bent portion, and in addition to the edges of the side walls 27 and 28, the side wall 27 and It is possible to weld along the butt line between the inner surface of 28 and the outer surface of the profiles 3 and 4 and the butt line between the connecting plates 24 and 25 and the ends of the profiles 3 and 4. For this reason, a large welding area can be obtained. Further, since the side walls 27 and 28 of the joining member 21 are welded to the side surfaces of the shape members 3 and 4, a reinforcing effect by the side walls can be obtained, and compared with the case where the shape members 3 and 4 are directly welded and joined. The strength of can be increased.

  A pair of profiles can be arranged in parallel to each other by the joining member according to the second embodiment and weld-joined. FIG. 5 is a cross-sectional view showing a shape member. The profiles 5 and 6 which are welded while being arranged in parallel to each other form an isosceles trapezoid in a cross section perpendicular to the longitudinal direction, and the angle of the corner of the lower bottom plate is such that the side wall 27 of the joining member 21 and the connecting plate 24 are connected. It coincides with the angle (obtuse angle) made.

  FIG. 6 is a perspective view showing a joining state when a pair of profiles are joined in parallel to each other using the joining member according to the second embodiment. In the present embodiment, the profile member 5 and the profile member 6 are positioned parallel to each other via the joining member 21, and then the joining member 21 and the profile member 5 are connected to the edge of the side wall 27 and the connecting plate 24. It welds and joins along the butt | matching line with the shape member 5, and the member 21 for joining and the shape member 6 are weld-joined similarly.

  In this embodiment, since the corners of the members 5 and 6 that are bent at the obtuse angle are fitted and set to the obtuse angled bent portion of the joining member 21, the members 5 and 6 are very easily connected to each other. Can be set parallel to Furthermore, since one side wall is in contact with one shape member, welding can be performed along the butt line between the connecting plates 24 and 25 and the shape members 5 and 6 in addition to the edges of the side walls 27 and 28. it can. For this reason, a large welding area can be obtained. In addition, the strength of the joint can be increased by the reinforcing effect of the side walls.

  Further, by using the joining member according to the second embodiment, it is possible to weld and join another shape member so as to be orthogonal to the shape member. FIG. 7: is a perspective view which shows the joining state in the case of joining so that another shape member may be orthogonally crossed to a shape member using the member for joining which concerns on a 2nd Example. In the present embodiment, the obtuse angle end of the shape member 3 is brought into contact with the obtuse angle formed by the shape contact surface of the connecting plate 24 and the inner surface of the side wall 27, and the shape contact surface of the connecting plate 25 and the side wall 28. An obtuse corner of the shape member 6 is brought into contact with an obtuse angle formed by the inner surface of the member 6. Then, the shape members 3 and 6 are welded to the joining member 21 as described above.

  In the present embodiment, the shape 3 can be set so as to be orthogonal to the shape 6 very easily, and a large welding area can be obtained. In addition, the strength of the joint can be increased by the reinforcing effect of the side walls.

  The angle formed by the shape contact surface and the inner surface of the outer wall may be an acute angle or a right angle. In the case of an acute angle, the shape fitted to the bent portion of the acute angle is less likely to be displaced, so that positioning is easier. However, in order not to deteriorate the welding workability, it is preferable that the angle and the size of the side wall are such that the welding torch can be easily inserted.

  FIG. 8 is a sectional view showing a frame shape according to a third embodiment of the present invention. In the shape member (frame shape member) 41 of the present embodiment, a cross section perpendicular to the longitudinal direction forms a trapezoid, and the connection plate corresponding to one leg is an upper bottom plate 42 and a lower bottom plate (second side plate) 43. The connecting plate (first side plate) 44 that is orthogonal and corresponds to the other leg forms an obtuse angle with the upper bottom plate 42 and an acute angle with the lower bottom plate 43. The outer surface of the connecting plate 44 is a shape abutting surface with which another shape abuts. Furthermore, a side wall 45 extending in parallel with the lower bottom plate 43 from a corner portion forming an acute angle is provided, and an obtuse angle is formed by the shape contact surface and the inner surface of the side wall 45.

  FIG. 9 is a sectional view showing a profile. The shape member 46 joined to the shape member 41 has a trapezoidal shape in a cross section perpendicular to the longitudinal direction thereof, and has a shape obtained by removing the side wall 45 from the shape member 41.

  FIG. 10 is a perspective view showing a joining state when other shape members are joined adjacent to each other using the frame shape member according to the third embodiment. In this embodiment, after positioning the obtuse angle bent portion of the shape member 46 at the obtuse angle bent portion formed by the shape member abutting surface of the shape member 41 and the inner surface of the side wall 45, Welding is performed along a butt line with the shape member 46.

  In the present embodiment, since the corner portion of the shape member 46 bent at the obtuse angle is fitted to the obtuse bent portion of the shape member 41 and set, the shape member 41 and the shape member 46 are set very easily adjacent to each other. can do. Further, since the side wall 45 of the shape member 41 is welded to the side surface of the shape member 46, a reinforcing effect by the side wall is obtained, and the strength of the joint is increased as compared with the case where the shape members 41 and 46 are directly welded. Can do.

  FIG. 11 is a perspective view showing a joining state when other shape members are joined orthogonally using the frame shape member according to the third embodiment. In the present embodiment, the shape member 47 joined orthogonally to the shape member 41 has, for example, the same shape as the shape member 3.

  In the present embodiment, the end portion of the shape member 47 bent at an obtuse angle is fitted to the obtuse angle bent portion formed by the shape member 41 and the shape member 47 between the shape contact surface of the shape member 41 and the inner surface of the side wall 45. After the positioning, the welding is performed along the edge of the side wall 45, the butting line between the inner surface of the side wall 45 and the outer surface of the profile 47 and the butting line between the connecting plate 44 and the end of the profile 47.

  In the present embodiment, since the end portion of the shape member 45 bent at the obtuse angle is fitted to the obtuse bent portion of the shape member 41 and set, the shape member 47 is set so as to be orthogonal to the shape member 41 very easily. be able to. Furthermore, since the side wall that contacts the shape member is one and the bent portion has an obtuse angle, it is easy to insert a welding torch, and in addition to the edge of the side wall 45, the inner surface of the side wall 45 and the outer surface of the shape member 47 And the butt line between the connecting plate 44 and the end of the profile 47 can be welded. For this reason, a large welding area can be obtained. In addition, the strength of the joint can be increased by the reinforcing effect of the side walls.

  Further, the angle formed by the shape member contact surface and the inner surface of the outer wall may be an acute angle. FIG. 12 is a sectional view showing a frame shape according to the fourth embodiment of the present invention. In the shape member (frame shape member) 61 of the present embodiment, a cross section perpendicular to the longitudinal direction has a trapezoidal shape, and the connection plate corresponding to one leg is an upper bottom plate 62 and a lower bottom plate (second side plate) 63. A connecting plate (first side plate) 64 that is orthogonal and corresponds to the other leg forms an acute angle with the upper bottom plate 62 and an obtuse angle with the lower bottom plate 63. The outer surface of the connecting plate 64 is a shape abutting surface with which another shape abuts. Furthermore, a side wall 65 extending in parallel with the lower bottom plate 63 from the obtuse corner is provided, and an acute angle is formed by the shape contact surface and the inner surface of the side wall 65. Further, the acute angle bent portion is chamfered.

  FIG. 13 is a cross-sectional view showing a profile. The shape member 66 joined to the shape member 61 has a trapezoidal shape in a cross section perpendicular to the longitudinal direction thereof, and the side wall 65 is removed from the shape member 65 and the corner portion bent at an acute angle is more than the chamfer of the shape member 61. It has a shape with a large chamfer.

  In the present embodiment, after positioning and positioning the corner portion of the shape member 66 bent at an acute angle to the acute angle bent portion formed by the shape contact surface of the shape member 61 and the inner surface of the side wall 65, Welding is performed along the butt line with the shape member 66.

  In the present embodiment, since the corner portion of the shape member 66 that is bent at an acute angle is fitted to the sharp bent portion of the shape member 61 and set, the shape member 61 and the shape member 66 are set adjacent to each other more easily. can do.

  Further, the shape member similar to the shape material 1 may be orthogonally cross-welded to the shape material 61 and welded. In this case, since the shape member fitted to the acute-angled bent portion does not shift, positioning is easier. However, in order not to deteriorate the welding workability, it is preferable that the angle and the size of the side wall are such that the torch can be easily inserted.

  The angle formed by the shape contact surface and the inner surface of the side wall may be a right angle.

It is sectional drawing which shows the member for joining which concerns on 1st Example of this invention. It is a figure which shows a profile, Comprising: (a) is a front view, (b) is a side view. It is sectional drawing which shows the member for joining which concerns on the 2nd Example of this invention. It is a perspective view which shows the joining state in the case of joining a pair of shape members in a straight line using the member for joining which concerns on a 2nd Example. It is sectional drawing which shows a profile. It is a perspective view which shows the joining state in case a pair of shape members are joined in parallel mutually using the joining member which concerns on a 2nd Example. It is a perspective view which shows the joining state in the case of joining so that another shape member may be orthogonally crossed to a shape member using the member for joining which concerns on a 2nd Example. It is sectional drawing which shows the frame shape material which concerns on the 3rd Example of this invention. It is sectional drawing which shows a profile. It is a perspective view which shows the joining state in the case of joining other shapes adjacently using the frame shape which concerns on a 3rd Example. It is a perspective view which shows the joining state in the case of joining other profiles orthogonally using the frame profile which concerns on a 3rd Example. It is sectional drawing which shows the frame shape material which concerns on the 4th Example of this invention. It is sectional drawing which shows a profile. It is sectional drawing which shows the member for joining based on the technique of Japanese Patent Application No. 8-237024. It is a perspective view which shows the welding joining which uses the member for joining based on the technique of Japanese Patent Application No. 8-237024. It is a figure which shows the space frame structure of a track | truck.

Explanation of symbols

1, 2, 3, 4, 5, 6, 41, 46, 47, 51, 61, 66; Profiles 11, 21; Joining members 12, 13; Connections 14, 15, 24, 25, 26, 44 , 64; connecting plate 16, 17, 27, 28, 45, 65; side wall 22; upper plate 23; lower plate 32, 33; fitting portion 42, 62; upper bottom plate 43, 63; lower bottom plate 50;

Claims (2)

A joining member used for positioning during welding of a welded structure manufactured by welding and joining rectangular tubular shapes made of an aluminum alloy, each having one surface extending in opposite directions in the same plane. A pair of side walls, a connecting portion communicating between the pair of side walls, and a contact surface extending at an acute angle with respect to the one surface of each side wall from the boundary between each side wall and the connecting portion A pair of contact plates having a single shape, and a pair of connecting portions are formed from each of the side walls and the corresponding contact plate. The side surface adjacent to the contact surface of the connecting portion and adjacent to the contact surface of the profile is in contact with the one surface of the side wall, thereby being used for positioning during welding. Joining member. A joining member used for positioning during welding of a welded structure manufactured by welding and joining square tubular shapes made of an aluminum alloy, each having one surface extending in opposite directions within the same plane. A pair of side walls, a connecting portion communicating between the pair of side walls, and a contact surface extending from the boundary between each side wall and the connecting portion so as to be inclined at an obtuse angle with respect to the one surface of each side wall A pair of contact plates having a single shape, and a pair of connecting portions are formed from each of the side walls and the corresponding contact plate. The side surface adjacent to the contact surface of the connecting portion and adjacent to the contact surface of the profile is in contact with the one surface of the side wall, thereby being used for positioning during welding. Joining member.

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