JP6965470B1 - Automatic piping or fusing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic welding or fusing device for a pipe capable of appropriately performing welding or fusing along the circumferential direction of the pipe while making a welding or fusing head follow the rotational runout of the pipe. SOLUTION: This is an automatic welding or fusing device 1 for a pipe P that automatically welds or flutes along the circumferential direction of the pipe P while rotating the pipe P around an axis, and is located on the outer peripheral surface of the pipe P. Then, the welding or fusing head 2 that welds or flutes the pipe P that rotates around the axis while following the rotational runout of the pipe P, and the welding or fusing head 2 that welds or flutes the pipe P in the vertical direction and the pipe. The head support mechanism 3 is provided with a head support mechanism 3 that is movably supported in the front-rear direction along the circumferential direction of P, and the head support mechanism 3 has a pair of rotary rollers 9 arranged in the circumferential direction of the pipe P, and a pair of rotary rollers 9 are provided. Rotates while in sliding contact with the outer peripheral surface of the pipe P. [Selection diagram] Fig. 1

Description

The present invention relates to an automatic welding or fusing device for piping.

For example, welding of a structure (workpiece) using a metal or non-ferrous metal as a base material is conventionally called GTAW (Gas Tungsten Arc welding) such as TIG welding (Tungsten Inert Gas welding) or plasma arc welding. Non-consumable electrode type gas shield arc welding is used.

Further, a consumable electrode type gas shield arc welding called GMAW (Gas Metal Arc welding) such as MIG welding (Metal Inert Gas welding), MAG welding (Metal Active Gas welding) or carbon dioxide gas arc welding is used.

In these welding methods, a welding torch is generally used to generate an arc between the electrode and the object to be welded (base metal), and the heat of this arc melts the object to be welded to form a molten pool (pool). Welding is performed while forming. Further, during welding, a shield gas is discharged from a torch nozzle surrounding the electrode, and welding is performed while blocking the atmosphere (air) with this shield gas.

By the way, in an automatic welding device that automatically welds an object to be welded, it is controlled so that the tip of the torch does not deviate from the welding line while keeping the distance between the object to be welded and the welding torch constant. (For example, see Patent Documents 1 and 2 below).

Jitsufuku No. 3-4381 Gazette Japanese Unexamined Patent Publication No. 9-295145

On the other hand, in an automatic pipe welding device that automatically welds along the circumferential direction of the pipe while rotating the pipe around the axis, the rotating shaft and the pipe that rotate the pipe so that the pipe does not run out of rotation. It is necessary to match with the central axis.

However, as the outer diameter of the pipe becomes larger, it becomes difficult to completely match the above-mentioned rotary shaft with the central shaft of the pipe, and the pipe causes rotational runout. Therefore, in the automatic piping apparatus, it is required to make the welding torch follow the rotational runout of the piping.

The present invention has been proposed in view of such conventional circumstances, and it is desired to appropriately perform welding or fusing along the circumferential direction of the pipe while making the welding or fusing head follow the rotational runout of the pipe. It is an object of the present invention to provide an automatic welding or fusing device for pipes which has been made possible.

In order to achieve the above object, the present invention provides the following means.
[1] An automatic welding or fusing device for a pipe that automatically welds or fusing along the circumferential direction of the pipe while rotating the pipe around an axis.
A welding or fusing head located on the outer peripheral surface of the pipe and welding or fusing the pipe rotating around the axis while following the rotational runout of the pipe.
The welding or fusing head is movably supported in the vertical direction and the front-rear direction along the circumferential direction of the pipe with respect to the pipe, and the position of the welding or fusing head in the front-rear direction with respect to the uppermost portion of the pipe is adjusted. Equipped with a flexible head support mechanism,
The head support mechanism has a pair of rotating rollers arranged in the circumferential direction of the pipe.
The pair of rotating rollers is an automatic welding or fusing device for piping, characterized in that the pair of rotating rollers rotate while being in sliding contact with the outer peripheral surface of the piping.
[2] The automatic welding or fusing device for piping according to the above [1], wherein the distance between the pair of rotating rollers is adjustable.
[3] An automatic welding or fusing device for a pipe that automatically welds or fusing along the circumferential direction of the pipe while rotating the pipe around an axis.
A welding or fusing head located on the outer peripheral surface of the pipe and welding or fusing the pipe rotating around the axis while following the rotational runout of the pipe.
It is provided with a head support mechanism that movably supports the welding or fusing head with respect to the pipe in the vertical direction and in the front-rear direction along the circumferential direction of the pipe.
The head support mechanism has a pair of rotating rollers arranged in the circumferential direction of the pipe and having an adjustable distance between them.
The pair of rotating rollers is an automatic welding or fusing device for piping, characterized in that the pair of rotating rollers rotate while being in sliding contact with the outer peripheral surface of the piping.
[ 4 ] The automatic piping according to any one of the above [1] to [3], wherein the pair of rotating rollers are pressed against the outer peripheral surface of the piping by the weight of the welding or fusing head. Welding or fusing equipment .
[5] Automatic welding or fusing of the pipe according to any one of the above [1] to [4], wherein the position of the welding or fusing head with respect to the axial direction of the pipe is adjustable. Device.
[6] The automatic welding or fusing device for piping according to any one of the above [1] to [5], wherein the welding head is a TIG welding torch.
[7] The automatic piping according to any one of the above [1] to [6], characterized in that a wire aiming guide for sending out a welding wire from the tip side thereof is provided while being attached to the welding head. Welding or fusing equipment.

As described above, according to the present invention, automatic welding or fusing of a pipe makes it possible to appropriately perform welding or fusing along the circumferential direction of the pipe while making the welding or fusing head follow the rotational runout of the pipe. It is possible to provide the device.

It is a perspective view which shows the structure of the automatic welding apparatus of a pipe which concerns on one Embodiment of this invention. It is a perspective view which shows the rotation support jig of a pipe. It is a schematic diagram for demonstrating the welding operation of an automatic welding apparatus. It is a schematic diagram which shows the state which offset the welding head to the rear side with respect to the uppermost part of a pipe. It is a side view which exemplifies the structure which adjusts the spacing of a pair of rotating rollers.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As an embodiment of the present invention, for example, the automatic welding device 1 for the pipe P shown in FIGS. 1 to 3 will be described.

Note that FIG. 1 is a perspective view showing the configuration of the automatic welding device 1 for the pipe P. FIG. 2 is a perspective view showing the rotation support jig 100 of the pipe P. FIG. 3 is a schematic view for explaining the welding operation of the automatic welding apparatus 1.

Further, in the drawings shown below, the XYZ Cartesian coordinate system is set, the X-axis direction is the front-rear direction (width direction) of the automatic welding device 1 along the circumferential direction of the pipe P, and the Y-axis direction is the axial direction of the pipe P. The left-right direction (depth direction) of the automatic welding device 1 is shown along the above, and the Z-axis direction is shown as the vertical direction (height direction) of the automatic welding device 1.

As shown in FIG. 1, the automatic welding apparatus 1 of the present embodiment automatically performs welding along the circumferential direction of the pipe P while rotating the pipe P about an axis.

Specifically, the automatic welding device 1 is located on the outer peripheral surface of the pipe P, and has a welding head 2 that welds to the pipe P that rotates around the axis while following the rotational runout of the pipe P. It is provided with a head support mechanism 3 that movably supports the welding head 2 with respect to the pipe P in the vertical direction and in the front-rear direction along the circumferential direction of the pipe P. The head support mechanism 3 is attached to the frame (not shown) of the automatic welding device 1.

The welding head 2 is a TIG welding torch (non-consumable welding torch) that has been generally used conventionally, and is a non-consumable electrode 4 that generates an arc with the pipe P and a molten pool generated by the arc (non-consumable welding torch). It has a torch nozzle 5 that discharges shield gas toward the pool).

A wire aiming guide 6 is attached to the welding head 2. The wire aiming guide 6 guides the filler wire W and feeds the filler wire W from the tip side of the filler wire W, and a liner (also referred to as a conduit) that feeds the filler wire W toward the tip of the feed head 6a. Say) It has 6b.

The feed head 6a has a nozzle shape in which the tip side thereof is extended toward the tip side of the non-consumable electrode 4. Further, the wire aiming guide 6 has a rotating mechanism 6c that rotatably supports the feeding head 6a, and the angle of the feeding head 6a can be adjusted. The liner 6b is connected to a wire feeding device (not shown), and the wire feeding device makes it possible to automatically feed the filler wire W.

The wire aiming guide 6 is attached to the front side of the welding head 2 via the guide support mechanism 7. The guide support mechanism 7 includes a height adjusting portion 7a for adjusting the position of the wire aiming guide 6 with respect to the welding head 2 in the vertical direction (Z-axis direction) and a horizontal direction (Y-axis direction) of the wire aiming guide 6 with respect to the welding head 2. It has a depth adjusting portion 7b for adjusting the position of.

In the guide support mechanism 7, the height adjusting portion 7a and the depth adjusting portion 7b can adjust the positions of the wire aiming guide 6 with respect to the welding head 2 in the vertical and horizontal directions, and then fix the positions. ..

Further, an after-shield mechanism 8 is attached to the welding head 2. The after-shield mechanism 8 has an after-shield cover 8a that covers the rear side in the welding line direction from the tip end side of the welding head 2, and is formed from the inside of the after-shield cover 8a immediately after welding the pipe P. Aftershield gas is released to the weld bead to be formed.

The head support mechanism 3 has a vertical slider 3a that movably supports the welding head 2 in the vertical direction (Z-axis direction) with respect to the pipe P, and moves the welding head 2 in the front-rear direction (X direction) with respect to the pipe P. A front-rear slider 3b that freely supports, a height adjusting portion 3c that adjusts the position of the welding head 2 in the vertical direction (X-axis direction) with respect to the pipe P, and a left-right direction (Y-axis direction) of the welding head 2 with respect to the pipe P. It has a depth adjusting unit 3d for adjusting the position.

In the head support mechanism 3, the welding head 2 can be constantly moved in the vertical direction and the front-rear direction with respect to the pipe P by the vertical slider 3a and the front-rear slider 3b. In the head support mechanism 3, the height adjusting portion 3c and the depth adjusting portion 3d can adjust the positions of the welding head 2 in the vertical direction and the horizontal direction with respect to the pipe P, and then fix the positions.

The head support mechanism 3 has a pair of rotating rollers 9 arranged in the circumferential direction of the pipe P. The pair of rotating rollers 9 are attached to the lower end of the upper and lower sliders 3a via a mounting plate 10 so as to keep the distance between the outer peripheral surface of the pipe P and the tip of the welding head 2 constant.

By being pivotally supported by the mounting plate 10, the pair of rotating rollers 9 can rotate while being in sliding contact with the outer peripheral surface of the pipe P. Further, the pair of rotating rollers 9 are pressed against the outer peripheral surface of the pipe P by the weight of the welding head 2.

Further, the head support mechanism 3 has an offset adjusting portion 11 for adjusting the position (offset) of the welding head 2 in the front-rear direction with respect to the uppermost portion of the pipe P. The offset adjusting unit 11 can change the mounting position of the mounting plate 10 in the front-rear direction with respect to the lower end portion of the vertical slider 3a.

In the head support mechanism 3, after adjusting the position of the welding head 2 in the front-rear direction with respect to the uppermost portion of the pipe P by the offset adjusting portion 11, the position can be fixed.

In the automatic welding apparatus 1 of the present embodiment having the above configuration, the rotation support jig 100 as shown in FIG. 2 is used.

The rotation support jig 100 has an elbow fixture 101 for fixing the elbow portion of the pipe P, and a rotation stand 102 for rotatably supporting the pipe P. The elbow fixture 101 is connected to a positioner (not shown) that rotates the pipe P. The rotation stand 102 rotatably supports the pipe P around the axis in a state where the rotation shaft S on the positioner side and the central axis C of the pipe P are aligned with each other.

In the automatic welding apparatus 1 of the present embodiment, as shown in FIGS. It is possible to make the welding head 2 follow the rotational runout of the pipe P while keeping the distance between the outer peripheral surface of the pipe P and the tip of the welding head 2 constant while moving in the direction.

Therefore, in the automatic welding apparatus 1 of the present embodiment, it is possible to appropriately perform welding along the circumferential direction of the pipe P while making the welding head 2 follow the rotational runout of the pipe P.

The present invention is not necessarily limited to that of the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, as shown in FIG. 4, the welding head 2 is preferably offset to the rear side with respect to the uppermost portion of the pipe P.

As a result, the welding head 2 forms a good welding bead by performing welding in the direction of descending (referred to as "downward") from the rear side of the outer peripheral surface of the pipe P from the uppermost portion of the pipe P. It is possible to do.

On the other hand, when the welding head 2 is offset to the front side with respect to the uppermost portion of the pipe P, the welding head 2 rises (referred to as “upward”) from the front side of the outer peripheral surface of the pipe P with respect to the uppermost portion of the pipe P. By performing welding, the shape of the weld bead deteriorates.

Further, the head support mechanism 3 may have a configuration in which the distance between the pair of rotating rollers 9 is adjustable, for example, as shown in FIGS. 5A, 5B, and 5C. In this case, by adjusting the distance between the pair of rotating rollers 9 according to the outer diameter of the pipe P, it is possible to maintain good followability of the welding head 2 with respect to the rotational runout of the pipe P.

In the above embodiment, a case where TIG welding is automatically performed along the circumferential direction of the pipe P while rotating the pipe P about the axis is illustrated, but the welding method is the same as TIG welding. Not limited to non-consumable electrode type gas shield arc welding, consumable electrode type gas shield arc welding such as MIG welding, MAG welding, and carbon dioxide gas arc welding may be used.

Further, in the above embodiment, the case where the present invention is applied to an automatic pipe welding device in which welding is automatically performed along the circumferential direction of the pipe by a welding head while rotating the pipe about an axis has been described. It is also possible to apply the present invention to an automatic pipe fusing device that automatically fusing a pipe along the circumferential direction of the pipe by a fusing head while rotating the pipe about an axis.

Further, the plasma arc is not limited to the above-mentioned welding applications, but is also used, for example, in brazing, joining, cutting, thermal spraying, melting furnaces, and the like on a work piece. In the present invention, applications other than welding are also treated as a form of welding.

1 ... Automatic welding device 2 ... Welding head (TIG welding torch) 3 ... Head support mechanism 6 ... Wire aiming guide 7 ... Guide support mechanism 8 ... Aftershield mechanism 9 ... Rotating roller 10 ... Mounting plate 11 ... Offset adjustment unit 100 ... Rotation Support jig P ... Piping C ... Central axis S ... Rotating axis

Claims (7)

An automatic welding or fusing device for pipes that automatically welds or fusing along the circumferential direction of the pipe while rotating the pipe around an axis.
A welding or fusing head located on the outer peripheral surface of the pipe and welding or fusing the pipe rotating around the axis while following the rotational runout of the pipe.
The welding or fusing head is movably supported in the vertical direction and the front-rear direction along the circumferential direction of the pipe with respect to the pipe, and the position of the welding or fusing head in the front-rear direction with respect to the uppermost portion of the pipe is adjusted. Equipped with a flexible head support mechanism,
The head support mechanism has a pair of rotating rollers arranged in the circumferential direction of the pipe.
The pair of rotating rollers is an automatic welding or fusing device for piping, characterized in that the pair of rotating rollers rotate while being in sliding contact with the outer peripheral surface of the piping. The automatic welding or fusing device for piping according to claim 1, wherein the distance between the pair of rotating rollers is adjustable. An automatic welding or fusing device for pipes that automatically welds or fusing along the circumferential direction of the pipe while rotating the pipe around an axis.
A welding or fusing head located on the outer peripheral surface of the pipe and welding or fusing the pipe rotating around the axis while following the rotational runout of the pipe.
It is provided with a head support mechanism that movably supports the welding or fusing head with respect to the pipe in the vertical direction and in the front-rear direction along the circumferential direction of the pipe.
The head support mechanism has a pair of rotating rollers arranged in the circumferential direction of the pipe and having an adjustable distance between them.
The pair of rotating rollers is an automatic welding or fusing device for piping, characterized in that the pair of rotating rollers rotate while being in sliding contact with the outer peripheral surface of the piping. The automatic welding or fusing device for a pipe according to any one of claims 1 to 3, wherein the pair of rotating rollers are pressed against the outer peripheral surface of the pipe by the weight of the welding or fusing head. The automatic welding or fusing apparatus for a pipe according to any one of claims 1 to 4, wherein the position of the welding or fusing head with respect to the axial direction of the pipe is adjustable. The automatic welding or fusing device for piping according to any one of claims 1 to 5, wherein the welding head is a TIG welding torch. The automatic welding or fusing device for a pipe according to any one of claims 1 to 6, further comprising a wire aiming guide that sends out a welding wire from the tip side thereof while being attached to the welding head.

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