JP6876222B2 - Welding equipment - Google Patents

Description

In the present invention, for example, one steel pipe and the other steel pipe (one object to be welded and the other object to be welded) adjacent to each other and flat steel (inclusions) arranged between these steel pipes are joined by welding. It relates to a welding apparatus suitable for this.

Conventionally, for example, when joining steel pipes adjacent to each other and flat steel arranged between these steel pipes by welding, first, the flat steel is arranged between the steel pipes adjacent to each other, and one of the flat steels is arranged. On the surface of, both sides of the flat steel are temporarily attached to the steel pipes located on both sides of the flat steel by welding.

Next, the steel pipe and the flat steel integrated by temporary attachment are turned over, and on the other surface of the flat steel, one side edge of the flat steel is welded by fillet welding to the steel pipe located on one side of the flat steel. After joining, the other side edge of the flat steel is joined to the steel pipe located on the other side of the flat steel by fillet welding.

Then, the steel pipe and the flat steel that have already been integrated are turned over again, and on one surface of the flat steel, both side edges of the flat steel are sequentially attached to the steel pipe on one side and the steel pipe on the other side by fillet welding.
Such a method of joining steel pipes and flat steel by welding is described in, for example, Patent Document 1.

Japanese Unexamined Patent Publication No. 2002-174401

However, in the conventional joining method by welding steel pipe and flat steel, when the flat steel that has been temporarily attached to the adjacent steel pipe is finally attached to the steel pipe by fillet welding, one of the flat steel is attached to the steel pipe on one side. After the side edge is mainly attached by fillet welding, the other side edge of the flat steel is mainly attached to the steel pipe on the other side by fillet welding.

Therefore, when one side edge of the flat steel is finally attached to the steel pipe on one side by fillet welding, strain due to the heat of welding is generated in the flat steel, and if the amount of this strain is large, The problem is that the other side edge of the flat steel cannot be attached to the steel pipe on the other side, or even if it can be attached, a gap is created between the steel pipe and the flat steel. It has, and it has been a conventional problem to solve this problem.

The present invention has been made by paying attention to the above-mentioned conventional problems. For example, between one steel pipe and the other steel pipe (one object to be welded and the other object to be welded) adjacent to each other and these steel pipes. When joining flat steel (inclusions) to be placed in, not only can flat steel and both steel pipes be joined without gaps by fillet welding, but also the welding work time can be shortened. It is an object of the present invention to provide a welding apparatus capable of performing.

In the first aspect of the present invention, inclusions arranged between both objects to be welded are joined to both one object to be welded and the other object to be welded along the one object to be welded by welding. A welding device for a moving portion that moves along both objects to be welded, and the one object to be welded and the other object to be welded that are mounted on the moving portion and move together with the moving portion. Welding with two welding torches, one side edge of the inclusion and the other side edge joined by welding , the moving portion having four traveling wheels arranged across the two objects to be welded. It is provided with a trolley, a trolley drive mechanism for running the welded trolley, and a copying mechanism for running the welded trolley along both objects to be welded by the trolley drive mechanism. It consists of an inclined shaft arranged at an angle with respect to the vertical axis of the trolley and a copying roller supported by the inclined shaft, and four of the welding trolleys are used to deflect to one of the objects to be welded when the welding trolley moves forward. in a state where the traveling wheels and settings, scanning roller of the copying mechanism on one of the weldment on the side for deflecting is configured you contact.

A second aspect of the present invention is configured to include two sets of torch support mechanisms mounted on the moving portion to individually and adjustably support the two welding torches.

In the third aspect of the present invention, the welding torch is arranged on the welding carriage of the moving portion on the one side to be welded and the other side to be welded, respectively, and the one side to be welded. The welding torch arranged in is supported by the torch support mechanism with the tip of the torch facing the welding line between the other object to be welded and the other side edge of the inclusion, and the other torch is supported by the torch support mechanism. The welding torch arranged on the welded object side is supported by the torch support mechanism with the tip of the torch facing the welding line between the one object to be welded and one side edge of the inclusion. The two welding torches are configured to be supported by being offset back and forth with respect to the traveling direction of the moving portion.

In the welding apparatus according to the present invention, when joining inclusions located between both objects to be welded to both one object to be welded and the other object to be welded, the moving portion is moved along both objects to be welded. Then, the two welding torches mounted on the moving portion move together with the moving portion.

During this movement, the weld torch of one of the two weld torches welds one object to be welded to one side edge of the inclusions and any of the two weld torches. The other welding torch welds the other workpiece to the other side edge of the inclusion.

That is, the inclusions are joined to one object to be welded and the other object to be welded at the same time, and the distortion of the inclusions caused by the heat of welding is the joint portion between the inclusions and both objects to be welded. The effect on the welding is small and suppressed.

Therefore, the inclusions and both objects to be welded are joined without gaps by welding, and in addition, the inclusions are joined to one object to be welded and the other object to be welded at the same time, so that welding can be performed in one pass. The time required for joining can be shortened by the amount of time required.

In the welding apparatus according to the present invention, for example, one steel pipe and the other steel pipe (one object to be welded and the other object to be welded) adjacent to each other and flat steel (inclusions) arranged between these steel pipes. When joining by welding, it is possible to join flat steel and both steel pipes without gaps by fillet welding, and in addition, it is possible to shorten the welding work time, which is a very excellent effect. Brought to you.

It is an overall configuration explanatory drawing which shows schematicly about the welding apparatus which concerns on one Embodiment of this invention. It is a back view of the moving part in the welding apparatus shown in FIG. It is a plane explanatory view of the moving part in the welding apparatus shown in FIG.

Hereinafter, the present invention will be described with reference to the drawings.
1 to 3 show a welding apparatus according to an embodiment of the present invention. In this embodiment, steel pipes adjacent to each other and flat steel arranged between these steel pipes are arranged by the welding apparatus according to the present invention. The case of joining will be described as an example.

As shown in FIG. 1, this welding device 1 is arranged between one steel pipe W1 and the other steel pipe W2 (one object to be welded and the other object to be welded) adjacent to each other and these steel pipes W1 and W2. It is a semi-automatic welding device that joins flat steel (inclusions) W3 by welding, and includes a moving portion 2 that moves along both steel pipes W1 and W2, and two sets of welded portions 10 and 10. The steel pipe on the front side of FIG. 1 (right side in FIG. 2, lower side in FIG. 3) is referred to as one steel pipe W1, and the steel pipe on the back side in FIG. 1 (left side in FIG. 2, upper side in FIG. 3) is referred to as the other steel pipe W2.

As shown in FIG. 2, the moving portion 2 includes a welding carriage 3 having a total of four traveling wheels 3a on the front, rear, left and right sides. The welding carriage 3 is arranged so that the left and right wheels 3a and 3a are in contact with the steel pipes W1 and W2, respectively, and straddle the steel pipes W1 and W2. By arranging the magnet 4 on the bottom surface 3b of the welding carriage 3. The magnetic force of the magnet 4 causes the left and right wheels 3a and 3a to be gripped by the steel pipes W1 and W2.

Further, the moving unit 2 includes a carriage drive mechanism 5 that transmits the output of the speed reducer-equipped motor 5a mounted on the welding carriage 3 to the traveling wheels 3a. The output of the motor 5a with a speed reducer may be transmitted to all four traveling wheels 3a by the bogie drive mechanism 5, or at least two of the four traveling wheels 3a, front and rear. It may be transmitted to the traveling wheels 3a.

Further, as shown in FIG. 3, the moving unit 2 is provided with a copying mechanism 6. The copying mechanism 6 is composed of an inclined shaft 6a arranged at a slight inclination with respect to the vertical axis of the carriage on the bottom surface 3b of the welding carriage 3 and a copying roller 6b supported by the inclined shaft 6a. , It is arranged at two places before and after the welding carriage 3.

In this case, the four traveling wheels 3a of the welding carriage 3 are set so as to deflect to one of the steel pipes W1 when advancing to the right in FIG. 3, and the rollers 6b, following the steel pipe W1 on the deflecting side, By bringing the 6b into contact with each other, the welding carriage 3 can be advanced along both the steel pipes W1 and W2.

On the other hand, the welding portions 10 equipped with two sets include a welding torch 11 supported by the torch support mechanism 20 on the welding carriage 3, a wire feeder 12 for feeding the filler wire to the welding torch 11, and a welding torch. A gas cylinder 13 for supplying shield gas to the 11 side and a welding power supply 14 are provided. The supply of the filler wire and the supply of the shield gas and the welding power source are performed via the cable 15 connecting the welding torch 11 and the wire feeder 12. Further, a general power supply 16 is used as the wire feeding power source of the wire feeder 12.

In this embodiment, one set of gas cylinder 13 and one set of welding power supply 14 are prepared for each of the two sets of welded portions 10 and 10, but one set of gas cylinder 13 and welding power supply 14 is provided by two sets of welded portions 10 and 10. It may be shared.

The torch support mechanism 20 includes a rail 21 fixed on the welding trolley 3 in a direction orthogonal to the trolley axis (horizontal direction in FIG. 2 and vertical direction in FIG. 3), and a slide frame 22 movably arranged on the rail 21. The slider 23 is arranged in the slide frame 22 so as to be movable in the vertical direction with respect to the welding trolley 3, and the base end portion of the slider 23 is around the slider shaft 24 parallel to the trolley shaft of the welding trolley 3. It includes an arm 25 that is rotatably supported, and a clamp 26 that is arranged at the tip of the arm 25 and grips the welding torch 11.
In this embodiment, one rail 21 is shared between the torch support mechanisms 20 and 20 of the two sets of welded portions 10 and 10.

The tip of the horizontal adjusting screw 27 penetrating the retaining wall 21a installed at the end of the rail 21 is screwed into the slide frame 22, and the rail 21 is rotated by rotating the head 27a of the horizontal adjusting screw 27. The position of the slide frame 22 above with respect to the welding carriage 3 is adjusted in the left-right direction. That is, the position of the welding torch 11 in the left-right direction is adjusted with respect to the joint portion between the two steel pipes W1 and W2 and the flat steel W3.

The tip of the vertical adjustment screw 28 penetrating the top wall 22a of the slide frame 22 is screwed into the slider 23, and by rotating the head 28a of the vertical adjustment screw 28, the slider 23 in the slide frame 22 The position of the welding carriage 3 in the vertical direction is adjusted. That is, the vertical position of the welding torch 11 is adjusted with respect to the joint portion between the two steel pipes W1 and W2 and the flat steel W3.

The clamp 26 is formed by connecting the ends of the two holding plates 26a and 26b in a hinge shape, sandwiching the welding torch 11 between the two holding plates 26a and 26b, and screwing the tips of the two holding plates 26a and 26b. The welding torch 11 is gripped by tightening with 29.

The welding torches 11 and 11 of the two sets of welded portions 10 and 10 are arranged on one steel pipe W1 side and the other steel pipe W2 side on the welding carriage 3, respectively, and are supported by the torch support mechanisms 20 and 20, respectively. Will be done.

In this case, the welding torch 11 arranged on one steel pipe W1 side on the welding carriage 3 has its tip 11a diagonally downward to the left in FIG. 2 and between the other steel pipe W2 and the other side edge W3b of the flat steel W3. It is supported by the torch support mechanism 20 in a state of being directed to the welding line X2.

Further, the welding torch 11 arranged on the other steel pipe W2 side on the welding carriage 3 has its tip 11a diagonally downward to the right in FIG. 2 and between one steel pipe W1 and one side edge W3a of the flat steel W3. It is supported by the torch support mechanism 20 in a state of facing the welding line X1. That is, the two welding torches 11 and 11 are supported so as to cross each other.

The two welding torches 11 and 11 are supported by being offset back and forth with respect to the traveling direction of the welding carriage 3. Reference numeral 8 in FIG. 3 is a limit switch.

Therefore, the procedure of joining the flat steel W3 arranged between the two steel pipes W1 and W2 to both of the steel pipes W1 and W2 adjacent to each other by fillet welding by the welding apparatus 1 according to the present embodiment will be described.

First, a plurality of steel pipes including adjacent steel pipes W1 and W2 are placed side by side on a jig (not shown), and flat steel W3 is arranged between the plurality of steel pipes including adjacent steel pipes W1 and W2. A plurality of flat steel W3s are temporarily attached to steel pipes located on both sides of each by welding.

Next, a plurality of steel pipes including the adjacent steel pipes W1 and W2 that have been temporarily attached and integrated are turned over and placed on the jig with the temporarily attached side facing down (state shown in FIG. 1). Following this, the welding carriage 3 which is the moving portion 2 is set between the steel pipes W1 and W2 adjacent to each other.

Specifically, the left and right wheels 3a and 3a of the welding carriage 3 are brought into contact with the steel pipes W1 and W2, respectively, and the welding carriage 3 is placed so as to straddle both the steel pipes W1 and W2. The copying rollers 6b and 6b of the copying mechanism 6 are brought into contact with the steel pipe W1 on the side to be welded, and the left and right wheels 3a and 3a are gripped by the steel pipes W1 and W2 by the magnetic force of the magnet 4 arranged on the bottom surface 3b of the welding carriage 3. ..

Next, both steel pipes W1, W2 and flat steel W3 are rotated by rotating the head 27a of the horizontal adjusting screw 27 and the head 28a of the vertical adjusting screw 28 in each of the torch support mechanisms 20 of the two welds 10 and 10. The positions of the welding torch 11 with respect to the welding lines X1 and X2 in between are adjusted in the horizontal direction and the vertical direction.

After that, the supply of the filler wire and the supply of the shield gas and the welding power supply to the welding torch 11 and 11 of the two welding portions 10 and 10 are started, respectively, and the welding carriage 3 is provided along the steel pipes W1 and W2. The two welding torches 11 and 11 mounted on the welding trolley 3 move together with the welding trolley 3.

During this movement, a welding torch 11 arranged on one steel pipe W1 side on the welding carriage 3 welds between the other steel pipe W2 to which the tip 11a is directed and the other side edge W3b of the flat steel W3. Fillet welding is performed on line X2, and one side edge of one steel pipe W1 and flat steel W3 whose tip 11a is directed by a welding torch 11 arranged on the other steel pipe W2 side on the welding carriage 3. Fillet welding is performed on the welding line X1 with W3a.

That is, joining of one steel pipe W1 and the other steel pipe W2 of the flat steel W3 by fillet welding is performed at the same time, and the strain of the flat steel W3 generated by the heat of welding is caused by the flat steel W3 and both steel pipes W1 and steel pipes. The influence on the joint portion with W2 is suppressed to be small.

Therefore, the flat steel W3 and both steel pipes W1 and steel pipes W2 are joined without gaps by welding, and in addition, one steel pipe W1 and the other steel pipe W2 of the flat steel W3 are joined by fillet welding at the same time. Therefore, the time required for joining can be shortened by the amount that welding can be completed in one pass.

Further, in the welding apparatus 1 according to the present embodiment, both steel pipes W1 and steel pipes W2 are straddled as moving portions 2 for moving the two welding torch 11, 11, and both steel pipes are arranged by the carriage drive mechanism 5 and the copying mechanism 6. Since the welding carriage 3 that runs along the W1 and the steel pipe W2 is adopted, the equipment cost can be reduced as much as a large-scale rail or guide is not required around both the steel pipes W1 and W2.

Further, in the welding apparatus 1 according to the present embodiment, the two welding torches 11 and 11 are individually supported on the welding carriage 3 by the two sets of torch support mechanisms 20 and 20 so that the positions can be adjusted individually. Fine alignment of the welding torches 11 and 11 with respect to the welding lines X1 and X2 can be performed.

Furthermore, in the welding apparatus 1 according to the present embodiment, the welding torch 11 arranged on the one steel pipe W1 side and the welding torch 11 arranged on the other steel pipe W2 side are supported by two sets of torch on the welding carriage 3. Since the mechanisms 20 and 20 support each other so as to cross each other, the welding carriage 3 can be stably traveled.

The configuration of the welding apparatus according to the present invention includes, for example, heat transfer tubes (one object to be welded and the other object to be welded) adjacent to each other and a membrane bar (inclusion) arranged between these heat transfer tubes. It can be used to manufacture the membrane panel of the boiler wall.

The configuration of the welding apparatus according to the present invention is not limited to the configuration of the above-described embodiment.

1 Welding device 2 Moving part 3 Welding trolley (moving part)
5 Bogie drive mechanism (moving part)
6 Copying mechanism (moving part)
11 Welding torch 20 Torch support mechanism 21 Rail 22 Slide frame 23 Slider 24 Slider shaft 25 Arm 26 Clamp W1 One steel pipe (one to be welded)
W2 The other steel pipe (the other to be welded)
W3 flat steel (inclusions)
W3a One side edge of flat steel W3b The other side edge of flat steel X1, X2 Welded wire

Claims (3)

A welding device that joins inclusions arranged between both objects to be welded to both one object to be welded and the other object to be welded along the one object to be welded by welding.
A moving part that moves along both welded objects and
One side edge and the other side edge of the inclusions are joined to the one object to be welded and the other object to be welded by welding while being mounted on the moving portion and moving together with the moving portion. Equipped with two welding torches ,
The moving portion includes a welding carriage having four traveling wheels arranged so as to straddle the objects to be welded, a carriage driving mechanism for traveling the welding carriage, and the welding carriage to cover the welding carriage by the carriage driving mechanism. Equipped with a copying mechanism that runs along the welded object,
The copying mechanism comprises an inclined shaft arranged at an angle with respect to the vertical axis of the carriage on the bottom surface of the welding carriage and a copying roller supported by the inclined shaft.
In a state where the four traveling wheels of the welding carriage are set so as to deflect toward one object to be welded when the welding carriage moves forward, the copying roller of the copying mechanism is applied to one object to be welded on the deflecting side. contact to that welding apparatus. The welding apparatus according to claim 1, further comprising two sets of torch support mechanisms mounted on the moving portion to individually and adjustably support the two welding torches. The welding torch is arranged on the welding trolley of the moving portion on the one side to be welded and the other side to be welded, respectively, and the welding torch arranged on the one side to be welded is The weld supported by the torch support mechanism with the tip of the torch facing the welding line between the other workpiece and the other side edge of the inclusion, and arranged on the other side of the weld. The torch is supported by the torch support mechanism with the tip of the torch facing the welding line between the one object to be welded and one side edge of the inclusion, and the two welding torch is the moving portion. The welding apparatus according to claim 2 , wherein the welding apparatus is supported by being offset back and forth with respect to the traveling direction of the above.

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