JP2557762Y2 - Joint weld structure of steel housing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint welding structure of a steel casing, and more particularly, to joining of a steel casing such as a cabinet assembled by performing semi-automatic welding or fully automatic welding with a carbon dioxide welding robot. It relates to the structure of the welded part.

[0002]

2. Description of the Related Art Conventionally, a housing such as a steel cabinet is formed by joining a corner portion of a body plate formed by bending a thin steel plate into a desired shape or a front stile portion of the body plate and a main plate or a top plate. Was manufactured by carbon dioxide arc welding using a welding robot.

[0003] In this joint welding portion, no particular problem occurs when two plate-shaped members are spot-welded in a state where they are overlapped with each other, but when two parts or two members are butt-joined to each other, the joint line is formed. When carbon dioxide arc welding is performed along the gap, the welding is not stable due to the gap or step between the two parts or the two members, and tearing or swelling is generated. Therefore, welding rework is required. In this case, the efficiency of the welding robot is halved and manufacturing costs cannot be reduced.

FIG. 13 shows an example of the structure of a conventional welded portion of a steel casing. One of both parts or members to be joined and welded to each other is set to 100 (joint piece), and the other is set to 200 (joint piece). In this case, the edge of the joining piece 100 and the edge of the piece 200 to be joined are made flat to each other, butted and joined together, and the state of carbon dioxide arc welding along the joining line 300 is simplified. It is shown. In the drawing, reference numeral 400 denotes a torch nozzle of the welding robot. FIG. 13A shows the state before welding, and FIG. 13B shows the state after welding.
This is a case where welding was successfully performed, but a gap or a step (not shown) due to a bending error exists between the edge of the joining piece 100 and the edge of the piece 200 to be joined as shown in FIG.
In addition, if thermal deformation occurs during welding, the arc becomes unstable, and spatters are ejected to the back side through the gap to cause poor welding.

[0005] Fig. 14 shows an example of the structure of a joint-welded portion of a conventional steel case, in which the edge of the joint piece 100 and the edge of the piece 200 to be joined are abutted at right angles to each other. FIG. 3 shows a simplified state of joining and carbon dioxide arc welding along the joining line 300. FIG.
(a) shows the state before welding and (b) shows the state after welding, and shows a case where welding was performed well. However, as shown in (c), the edge of the joint piece 100 and the edge of If there is a gap between them due to a bending error, poor welding also occurs.

[0006]

[Problems to be solved by the invention] As described above, when welding is performed using a semi-automatic or fully automatic welding robot,
Although labor saving is possible and high-speed welding is possible, welding defects tend to occur depending on the state of the welded joint and it is difficult to make fine adjustments. Significant reduction in manufacturing costs cannot be achieved.

[0007] In view of the above situation, the present invention is intended to solve the problem. When a carbon case welding robot performs semi-automatic welding or fully automatic welding to assemble a steel housing such as a cabinet, the present invention is applied to a joint welding portion. Gap and steps due to dimensional errors and bending errors are less likely to occur,
Another object of the present invention is to provide a joint-welded structure of a steel casing that can stably weld even when there is a slight gap or a step.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a joint weld at a corner of a body plate bent by a steel plate or a base plate or a top plate bent by a steel plate. In a joint welded portion with the front stile portion of the body plate, one of two parts or both members to be joined and welded to each other, one end edge of which is joined to the other surface, and a welding auxiliary piece extending from the other joined part is attached while it disposed on the rear side of the edge, solution
The triangular dowel protruding from the contact auxiliary piece is attached to one part or member
To form a joint welded structure of a steel housing formed by carbon dioxide arc welding along the joint line between both parts or both members.

[0009]

According to the joint welding structure of the steel casing of the present invention having the above-mentioned contents, in the joint welding portion, one end of both portions or both members to be joined and welded to each other is joined to the other surface. A welding auxiliary piece extending from the other part to be welded is disposed on the back side of one edge, and the welding auxiliary piece is provided.
Remove the triangular dowel protruding from the auxiliary piece to one part or member.
By only the retaining engagement, contact of the two parts or both members
As well as positioning of the joints , gaps and steps are unlikely to occur between both parts or both members.In addition, the strength of the joints is improved and thermal deformation during welding is suppressed. Even if it occurs, the generation of the arc is stabilized, so that good carbon dioxide arc welding can be performed along the joining line of both parts or both members, and therefore, even if a semi-automatic or fully automatic welding robot where fine adjustment is difficult to work is used It is possible to minimize the occurrence of poor welding.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; FIG. 1 and FIG. 2 show the structure of a joint weld when two parts or two members made of steel are butt-joined and welded in a plane, and in the case where they are butt-joined and welded at right angles. Reference numeral 1 denotes one joining piece, 2 denotes the other joined piece, and 3 denotes a torch nozzle of the carbon dioxide arc welding robot. In the figure, M
Is a weld.

The present invention relates to a joint weld at a corner of a body plate bent by a steel plate or a joint weld between a base plate or a top plate bent by a steel plate and a front stile portion of a body plate. The edge 4 of one part (joint piece 1) of both parts or both members to be joined and welded is joined to the surface 5 of the other (joint piece 2) and extends from the other part (joint piece 2). The gist is that the welding auxiliary piece 6 is disposed on the back side of the one edge 4 and carbon dioxide arc welding is performed along the joining line 7 of both parts or both members.

More specifically, a steel housing such as a cabinet according to the present invention has a body formed by bending a thin steel plate to form a back plate 8 and side plates 9 on both sides thereof, as shown in FIG. This is a box with an open front formed by fixing a main plate 11 to a lower portion of the plate 10 and fixing a top plate (not shown) to an upper portion. This embodiment particularly shows the structure of the joint weld at the lower corner of the body plate 10 and the joint weld between the main plate 11 and the front stile portion 12 of the body plate 10.

As shown in FIG. 3 and FIG. 12, the body plate 10 is formed by bending a ground stile portion 13 and ground side stile portions 14, 14 at the lower edges of the back plate 8 and the side plates 9, 9, respectively. Each has a bottom plate 15 bent at a right angle and an upright plate 16 formed by bending an inner edge of the bottom plate 15 upward at a right angle. At the lower corners of the back plate 8 and the side plate 9, Edges of the stile portion 13 and the ground side stile portion 14 are butt-joined and welded. That is, the edge 4 of one standing plate 16 (joining piece 1) and the surface 5 of the other standing plate 16 (piece 2 to be joined) are butt-joined, and the joining line 7 is welded. In particular,
Bevel edge 17 cut at a predetermined angle at one end of bottom plate 15
And a straight edge 18 which is continuous with the bevel edge 17 and is orthogonal to the back plate 8.
The beveled edge 17 and the straight edge 18 are formed in a letter shape in a bottom view, and the edge 4 is formed continuously with the straight edge 18 at right angles. The other bottom plate 15 has a beveled edge 19 joined to the beveled edge 17. Then, the beveled edge 17 and the beveled edge 19 are butt-joined, and the edge 4 of one upright plate 16 (joint piece 1) is left with the end of the other upright plate 16 (joint piece 2). Then, they are butted and joined to the surface 5 at right angles, and carbon dioxide arc welding is performed along the joining line 7 of the supporting plates 16, 16. Here, the standing plate 16 with an extra end
The end of the (joined piece 2) becomes the welding auxiliary piece 6.

The front edge of the side plate 9 of the body plate 10 has
As shown in FIGS. 3 to 9, a side front stile portion 12 is formed,
At the corner between the lower end of the front stile portion 12 and the front end of the ground stile portion 14, the end of the ground stile portion 20 formed at the front edge of the base plate 11 is joined and welded. . The side front stile portion 12 includes a side front plate 21 formed by bending a front edge of the side plate 9 inward at a right angle, an inner plate 22 formed by bending a right angle rearward from the side front plate 21, and It is formed by a reinforcing plate 23 bent outward at a right angle from the rear edge of the inner plate 22. At the lower end of the side stile portion 12, approximately half of the width of the inner plate 22 and the reinforcing plate 23 are cut out, and at the front end of the ground side stile portion 14, a standing plate 16 is formed.
Are cut out to form the engaging portions 24. The engaging portion 24
The portion of the inner plate 22 of the side front stile portion 12 corresponding to. Here, the side front plate 21 of the side front stile portion 12 and the bottom plate 15 of the ground side stile portion 14 become the joint pieces 1 respectively.

On the other hand, the ground stile portion 20 of the ground plate 11 has a ground plate 27 formed by bending the front edge of the bottom plate 26 downward at right angles.
And a bottom plate 28 formed by bending a lower edge of the ground plate 27 rearward at right angles, and a reinforcing plate 29 formed by bending a rear edge of the ground plate 28 upward at right angles. In addition, the ground plate 27 and the ground plate 28 serve as the pieces 2 to be joined. Then, the edge of the ground plate 27 is stepped and extended to form a projecting piece 30 for temporary fixing, and the engaging piece 2 is provided on the front face of the projecting piece 30.
A triangular dowel 31 is formed on the edge of the base plate 5 so as to prevent it from slipping off, and the edge of the ground plate 28 is stepped and extended to form a projection 32 for positioning. Here, the protruding pieces 30 and the protruding pieces 32 become the welding auxiliary pieces 6, respectively.

The projecting piece 30 of the ground stile 20
The (welding auxiliary piece 6) and the protruding piece 32 (welding auxiliary piece 6) are inserted into the engaging portion 24 formed at the corner between the lower end of the side front stile portion 12 and the front end of the ground side stile portion 14. , The protruding piece 3
The triangular dowel 31 of 0 is securely engaged with the engaging piece 25 of the front stile portion 12 and the projecting piece 32 is connected to the ground side stile portion 1.
4 and positioned on the inner surface of the bottom plate 15, and as shown in FIGS. 10 and 11, the side front plate 21 (joining piece 1) of the side front stile portion 12 and the ground front plate 27 of the ground front stile portion 20 ( The joined piece 2), the bottom plate 15 (joined piece 1) of the ground-side stile portion 14 and the ground bottom plate 28 (joined piece 2) of the ground stile portion 20 are butt-joined in a substantially flat plane. , Each joint line 7
Along with carbon dioxide arc welding. Here, the engaging piece 25 (edge 4) of the side front stile portion 12 and the step portion 33 (surface 5) of the protruding piece 30 of the ground front stile portion 20 are formed by a triangular dowel
1 is in close contact with the inner edge of the engagement piece 25, and the edge 4 of the bottom plate 15 of the side front stile portion 12 and the step portion 34 (surface 5) of the protruding piece 32 of the ground stile portion 20. Can be set to be in close contact. Further, by making the step of the step portion 34 coincide with the thickness of the bottom plate 15, the projecting piece 32 can be overlapped on the upper surface of the bottom plate 15.

As described above, the protruding pieces 30 and the protruding pieces 32 are engaged with the engaging portions 24, so that the main plate 1
Since the first temporary fixing is performed in the up and down and front and back positioning state, the generation of a gap or a step in the joining weld portion is suppressed to a minimum, and the welding assist of the other joining piece 2 on the back side of one joining piece 1 is provided. Since the piece 6 is located, the strength of the welded joint is improved, deformation during welding is suppressed, and even if a semi-automatic or fully-automatic welding robot, which is difficult to perform fine adjustment, is used, the welding is stable and the welding is broken. Swelling is suppressed.

[0018]

According to the joint welding structure of the steel casing of the present invention as described above, the joint welding at the corner of the body plate bent by the steel plate or the base plate bent by the steel plate. Or, in a joint welding portion between a top plate and a front stile portion of a body plate, welding in which both portions to be joined and welded to each other or one edge of both members are joined to the other surface and extended from the other joined portion. disposing an auxiliary piece on the back side of one of the edge
At the same time, a triangular dowel protruding from the welding auxiliary piece is
Since it engages with the part or member and prevents it from slipping, and is formed by carbon dioxide arc welding along the joint line of both parts or both members,
Positioning of the joint weld of both parts or members
In addition, when a gap or a step is unlikely to occur between both parts or both members in the joint weld, the strength of the joint weld is improved and thermal deformation during welding is suppressed, and if a gap or a step occurs somewhat However, since the generation of the arc is stabilized, good carbon dioxide arc welding can be performed along the joining line of both parts or both members. As a result, even if a semi-automatic or fully automatic welding robot that is difficult to perform fine adjustment is used, occurrence of welding defects can be suppressed to a minimum, and a significant reduction in manufacturing cost can be achieved.

[Brief description of the drawings]

FIG. 1 is a simplified sectional view showing a first embodiment of the present invention,
(a) shows the state before welding and (b) shows the state after welding.

FIG. 2 is a simplified sectional view showing a second embodiment of the present invention;
(a) shows the state before welding and (b) shows the state after welding.

FIG. 3 is an exploded perspective view of a main part showing a specific structure of a steel housing.

FIG. 4 is a main part side view of a lower front part of a side plate constituting the body plate, as viewed from inside.

FIG. 5 is a bottom view of a main part of the side plate.

FIG. 6 is a side view of a main part showing an end of a main plate.

FIG. 7 is a bottom view of the main part of the main plate.

FIG. 8 is a longitudinal sectional side view of a main part in a state where a side plate and a base plate are joined.

FIG. 9 is a bottom view of a main part in a state where the side plate and the ground plate are joined together.

FIG. 10 is a simplified cross-sectional view showing a joint weld between a front stile portion of a side plate and a front stile portion of a main plate.

FIG. 11 is a simplified cross-sectional view showing a joint weld between a ground side stile portion of the side plate and a ground side stile portion of the ground plate.

FIG. 12 is a cross-sectional plan view showing a joint weld at a lower corner portion of the back plate and the side plate of the body plate.

FIG. 13 is a cross-sectional view showing a conventional example of butt-joining and welding in a planar shape, where (a) shows before welding, (b) shows after welding, and (c) shows a case where welding is poor. .

14A and 14B are cross-sectional views showing a conventional example of butt-joining and welding at right angles, where (a) shows before welding, (b) shows after welding, and (c) shows a case where welding is poor. .

[Explanation of symbols]

 M Welded part 1 Joint piece 2 Piece to be joined 3 Torch nozzle 4 Edge 5 Surface 6 Welding auxiliary piece 7 Joining line 8 Back plate 9 Side plate 10 Body plate 11 Ground plate 12 Front stile portion 13 Ground stile portion 14 Ground stile portion 15 Bottom plate 16 Standing plate 17 Bevel edge 18 Straight edge 19 Bevel edge 20 Ground stile 21 Side front plate 22 Inner plate 23 Reinforcement plate 24 Engagement part 25 Engagement piece 26 Bottom plate 27 Ground plate 28 Ground plate 29 Reinforcement plate 30 Projection 31 Triangular dowel 32 Projection 33 Step 34 Step

Claims (1)

(57) [Scope of request for utility model registration] 1. A welded joint at a corner of a body plate bent by a steel plate or a welded joint between a base plate or a top plate bent by a steel plate and a front stile portion of the body plate. One edge of both portions or members to be welded is joined to the other surface, and a welding auxiliary piece extending from the other joined portion is arranged behind one edge , and
Insert the triangular dowel protruding from the welding auxiliary piece into one part or
Combined retaining engagement omission in wood, both portions or joint weld structure steel housing, characterized by comprising carbonated gas arc welding along the welding line of two members.