JPH07178552A - Welder - Google Patents

Abstract

PURPOSE:To improve the quality of a weld zone by turning a second turning member provided with a weld torch around a horizontal axis on a first turning member by driving a second turning device. CONSTITUTION:A traveling table 5 is moved on the rail 3 of a frame 2 provided along the side plane of a material 1 to be welded via a traveling device 4. A horizontally movable table 8 is mounted on the traveling table 5 in such a way that it can be freely approachable with the side plane of the material to be welded in a horizontal direction. The horizontal movable table 8 is driven by a horizontal driving device 7. An elevation table 30 is provided along the height direction of the material 1 to be welded via an elevator 29 in such a way that it can be elevated freely. The first turning member 33 is mounted on the elevation table 30 via the first turning device 31 around a vertical axis in such a way that it can be turned freely. The second turning member 37 provided with the welding torch 36 is mounted on the first turning member 33 via the second turning device 34 around the horizontal axis 35 in such a way the it can be turned freely. In this way, it is possible to reduce burden on a worker and to facilitate welding work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device for welding a joint of an object to be welded such as a steel column.

[0002]

2. Description of the Related Art Conventionally, in the case of welding a prismatic steel frame column at a construction site, face-to-face welding is performed so that the steel frame columns are welded at the same time in order to obtain the required accuracy. In this case, a rail is attached to a predetermined position of the steel frame column, and a welding device is guided by the rail to automatically travel to weld the joint portion of the steel frame column.

[0003]

When welding a joint portion of a steel column as described above, it is a labor-intensive work to attach a rail to the steel column, and particularly, the position of the joint portion is a mounting surface of the steel column. From above (for example, 1 m or more), there is a problem that workability is further deteriorated.

Therefore, the present invention has an object to provide a solution to the above problems.

[0005]

Means for solving the problems in the present invention include a traveling platform which can travel on a rail provided along a side surface of an object to be welded via a traveling device, and the traveling platform. To the side surface of the object to be welded in a horizontal direction so as to be able to approach and separate in the horizontal direction, a horizontal moving device for driving the horizontal moving table, and a workpiece to be welded to the horizontal moving table through an elevating device. An elevating table provided to be vertically movable along the height direction of the object, a first rotating member attached to the elevating table via a first rotating device so as to be rotatable about a vertical axis, and The second rotating member is attached to one rotating member so as to be rotatable around a horizontal axis through a second rotating device and has a welding torch.

[0006]

In the above means for solving the above problems, when the traveling device is driven, the traveling platform travels on the rail provided along the side surface of the object to be welded, and the horizontal moving device is driven to move the horizontal traveling platform on the traveling platform. Horizontally approach and separate from the side surface of the work piece, drive the lifting device to move the lifting table up and down along the height direction of the work piece on the horizontal moving table, and drive the first turning device. The first rotating member is rotated around the vertical axis on the lifting platform to drive the second rotating device to rotate the second rotating member having the welding torch around the horizontal axis on the first rotating member. Weld by moving.

[0007]

EXAMPLES Examples of the welding apparatus of the present invention will be described below with reference to FIGS.
It will be described based on. A welding apparatus according to an embodiment of the present invention welds a joint portion 1a of a prismatic workpiece (hereinafter referred to as a steel frame column) 1 at a construction site. As shown in the schematic diagram of FIG. 1, a rail-mounting pedestal 2 that is in contact with the side surface of the steel-framed column 1 on the installation surface of the steel-framed column 1 is arranged, and a rail is mounted on the pedestal 2 along the side-face of the steel-framed column 1. 3 is installed on the rail 3 via the traveling device 4 and is freely movable on the rail 3;
A horizontal moving table 8 which can be moved laterally (horizontally) toward and away from the side surface of the steel column 1 via the mounting member 6;
The horizontal moving table 8 is formed in a box shape that is long in the left-right direction.

The rail 3 is mounted on the pedestal 2 via a pair of left and right L-shaped angles 9, and a flat plate having a length substantially the same as that of the prism 10 mounted on the upper surface of the prism 10. The guide member 11 has a groove 11a formed on the upper surface thereof, and the four corners of the guide member 11 are chamfered 11b.

The traveling table 5 is formed in a U-shaped cross-section that is open on the lower side, and a guide roller 13 that rolls in contact with the chamfer 11b via a support member 12 is arranged on the inner surface of the hanging plate 5a. ing.

The traveling device 4 includes an upper plate 5 of the traveling table 5.
The drive motor 15 is mounted on the drive shaft b, and the output shaft 14 is directed downward, and the tip of the output drive shaft 14 is housed in the recessed portion 11a.
And a pinion 16 mounted on the output shaft 14, and a pinion 1 mounted on the upper surface of the guide body 11.
6 and a rack 17 that meshes with the rack 6.

By driving the traveling drive motor 15, the pinion 16 rotates while meshing with the rack 17, the guide roller 13 rolls on the chamfer 11b, and the traveling table 5 travels.

A horizontal moving device 7 for driving the horizontal moving table 8 in the lateral direction is provided, and the horizontal moving device 7 is mounted on the upper surface of the horizontal moving table 8 on the side opposite to the steel column 1.
And a transmission mechanism 23 for transmitting the drive of the horizontal drive motor 21 to a ball screw 22 penetratingly supported in the mounting member 6.

The end of the ball screw 22 on the steel frame 1 side is
The horizontal moving table 8 is supported by one side plate, and the end of the ball screw 22 on the opposite side of the steel column 1 penetrates the other side plate and is supported by the bearing 24.

The transmission mechanism 23 is a small-diameter pulley 26 attached to the output shaft 25 of the horizontal drive motor 21.
And a large-diameter pulley 27 attached to the end of the ball screw 22 and a transmission belt 28 wound around the pulleys 26, 27.
By driving 1, the drive is transmitted to the ball screw 22 via the transmission mechanism 23, and the ball screw 22 rotates with respect to the nut body (not shown) provided in the mounting member 6, As a result, the horizontal moving table 8 is moved toward and away from the steel column 1.

An elevating table 30 which is vertically movable along the height direction (vertical direction) of the steel column 1 is attached to the horizontal moving table 8 through an elevating device 29, and the first rotating device 3 is attached to the elevating table 30.
The first rotating member 33 is attached to the first rotating member 33 so as to be rotatable about the vertical axis 32 (for example, 105 ° to the left and right in the state of FIG. 3) via the first rotating member 33. A second rotating member 37, which is attached to be rotatable about a horizontal shaft 35 via a rotating device 34 (for example, 60 ° and 30 ° forward and backward in the state of FIG. 4, respectively) and has a welding torch 36, is provided. ing.

As shown in the plan views of FIGS. 1 and 2, the lifting table 30 is a lifting member 38 having a U-shaped cross-section with the opposite side (horizontal moving table side) of the steel column 1 open, and the lifting member 38. It is composed of a tubular member 40 arranged on the side of the steel frame column 1 and having a first turning motor 39 described later therein.

The elevating device 29 includes an elevating drive motor 41 mounted on the horizontal moving table 8 through a case C.
A pinion 43 mounted on the output shaft 42 of the lifting drive motor 41; a rack 44 mounted on the opening side of the lifting member 38 and meshing with the pinion 43; and a rack 44 mounted on the opening side of the lifting member 38. Pillar lift rail 45
And a guide member 46 attached to the side surface of the steel frame column 1 of the horizontal moving table 8 and slidably guiding the lifting operation of the lifting rail 45.
By driving 1, the pinion 43 rotates while meshing with the rack 47, the elevating rail 45 is guided by the guide member 46, and the elevating table 30 moves up and down.

The first turning device 31 has the first turning motor 39 installed in the tubular member 49 with the output shaft 48 facing upward, and the output shaft 48 of the first turning motor 39.
And a receiving member 51 for fitting and installing the first rotating member 33.

The first rotating member 33 is a fitting member 52 fitted and installed on the receiving member 51, and the fitting member 52.
And a motor support member 54 for mounting a second turning motor 53 which will be described later. The first turning member 33 rotates around the vertical shaft 32 by driving the first turning motor 39. Turn to.

The second turning device 34 has the above-mentioned second turning motor 53 attached to the motor supporting member 54 with the output shaft 55 facing the side, and the output shaft 55 of the second turning motor 53. And a disc-shaped rotating body 56 attached to the.

The second rotating member 37 is the rotating member 56.
Arm 57 having an L-shaped cross section, which is installed upright on the plate surface of
And a gripping member 58 arranged at the upper end of the arm 57 for gripping the welding torch 36. By driving the second rotary motor 53, the second rotary member 37 moves the horizontal axis. Rotate around 35.

A sensor 59 is attached to the upper surface of the grip member 58. The sensor 59 detects misalignment (step) 1b of the joint 1a as shown in FIGS. It is for controlling.

In the above structure, the gantry 2 is installed on the installation surface of the steel frame pillar 1, the rails 3 are mounted on the gantry 2 along the facing side surfaces of the steel frame pillar 1, and the welding device is attached to each rail 3. Is installed, and the horizontal drive motor 21, the elevation drive motor 41, the first rotation motor 39, and the second rotation motor 53 are appropriately driven to bring the welding torch 36 close to the joint portion 1a of the steel column 1 and to run. The drive motor 15 is driven to move the entire welding apparatus and automatically perform face-to-face welding from the corner of the joint 1a.

By the way, depending on the type of the steel column 1, the corners thereof are formed at right angles as shown in FIG.
As shown in FIG. 3, it may be formed in an arc shape. When the corners of the steel column 1 are formed at right angles, the welding torch 36 is rotated about the vertical axis 32 as described above,
From the bending angle of the steel column 1 to a predetermined distance (a in the figure)
Welding), then the welding torch 36 is temporarily stopped (section indicated by L1 in the figure), the welding torch 36 is rotated about the vertical axis 32, and the horizontal drive motor 21 is turned on. The welding torch 36 is driven to pull in the direction of the side surface to be welded, and welding of the straight line portion (indicated by b in the figure) is started. After the welding of the straight portion is completed, the welding of another corner is performed in the reverse operation.

Joint portions 1a on both sides facing the above operation
With respect to the unwelded face-to-face contact, only the welding of the straight line portion remains, so the welding device is re-installed on the other side face to face and the straight line portion is face-to-face welded.

Further, as shown in FIG. 7, when the corner of the steel column 1 is arcuate, the first rotating motor 39 is driven to rotate the welding torch 36 along the diameter of the arcuate portion. Meanwhile, welding is continuously performed from the corner toward the straight line portion (section indicated by L2 in the figure).

As described above, according to the embodiment of the present invention, the pedestal 2 is mounted on the installation surface of the steel column 1, the rail 3 is set on the pedestal 2, and the welding device is set on the rail 3. Therefore, the workability for installing the welding device is improved as compared with the case where the rail 3 is directly attached to the steel column 1.

Further, since the welding device welds the joint portion 1a on one side surface of the steel frame column 1 and continuously welds a part (corner) of the other side surface adjacent to the welding portion 1a as well, the welding of the steel frame column 1 will be performed later. There is no need to weld only the corners as a separate process, therefore the burden on the operator is reduced, the welding work is facilitated, and only the corners of the steel column 1 are not welded as a separate process. As a result, the quality of the welded portion can be improved.

[0029]

As is apparent from the above description, according to the present invention, the rail is arranged along the side surface of the object to be welded without directly mounting the rail to the object to be welded, and the welding device is installed on this rail. Therefore, even if the position of the joint is higher than the installation surface of the object to be welded, it does not take time and effort to install the rail and the welding device.

Further, by rotating the welding torch about the vertical axis,
By continuously welding from the corner of the joint of the work piece to the straight part, it is not necessary to weld only the corner of the work piece as a separate process, thus reducing the burden on the operator. Since the welding work is facilitated and the corners of the workpiece are not welded as a separate process, the quality of the welded portion can be improved.

[Brief description of drawings]

FIG. 1 is a partially broken overall detailed view of a welding apparatus showing an embodiment of the present invention.

FIG. 2 is a partial plan view of the welding apparatus on the side of a steel frame column.

FIG. 3 is likewise an overall schematic plan view.

FIG. 4 is a schematic side view of the same.

FIG. 5 is a plan view showing the same working process.

FIG. 6 is a plan view of a joint portion of a steel column in which the corner portion is also angular.

FIG. 7 is a plan view of a joint portion in which a corner of a steel column is also arcuate.

FIG. 8 is a side view showing a misalignment of a joint portion of a steel frame column.

FIG. 9 is a side view showing a misalignment of the joint portion of the steel frame column.

[Explanation of symbols]

 1 Steel column 2 Frame 3 Rail 4 Traveling device 5 Traveling table 7 Horizontal moving device 8 Horizontal moving table 13 Guide roller 15 Traveling drive motor 22 Ball screw 23 Transmission mechanism 30 Lifting table 29 Lifting device 31 First rotating device 33 First time Moving member 34 Second turning device 35 Horizontal shaft 36 Welding torch 37 Second turning member 39 First turning motor 41 Lifting drive motor 45 Lifting rail

Claims (1)

[Claims] 1. A traveling platform that can travel on a rail provided along the side surface of the object to be welded through a traveling device, and can be moved toward and away from the traveling platform in the horizontal direction relative to the side surface of the object to be welded. A mounted horizontal moving table, a horizontal moving device for driving the horizontal moving table, and an elevating table provided on the horizontal moving table via an elevating device so as to be vertically movable along the height direction of the workpiece. A first rotating member rotatably attached to the elevating table via a first rotating device about a vertical axis; and a horizontal rotating shaft attached to the first rotating member via a second rotating device. And a second rotating member having a welding torch rotatably attached to the welding device.