JPS5935342Y2 - Vertical circumferential automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for automatically welding a circular workpiece in an upright position to a part of the circumferential surface of a large cylindrical container provided with reinforcing ribs.

A reinforcing material (rip) 2 is often attached to the outer periphery of a large cylindrical container 1 as shown in FIG. 1 in order to provide sufficient rigidity against pressure and other forces.

As the reinforcing material 2, a T-shaped reinforcing rib consisting of a web 2b and a face 2a is used, which are welded perpendicularly to the outer surface of the container 1 at appropriate intervals.

Further, a reinforcing rib 2 having a flange 2C protruding from the face 2a may be used.

This container 1 is attached to the large cylindrical container 1 configured in this way.
A cylindrical metal fitting 3 with a rim passing through the container may be attached perpendicularly to the circumferential surface of the container.

In such a case, since the diameter of the container is very large compared to the plate thickness, welding around the circumference of the metal fittings 30 is performed while the container is standing upright as shown in FIG.

Traditionally, this welding was performed manually in an upright position, but in cases where welding heat input is severely restricted, such as in the case of high-grade materials, not only is a high level of skill required of the welding operator, but also severe welding heat input is required. Management is required.

Therefore, automation of welding is necessary from the viewpoint of welding heat input management, and there is a desire for the development of automatic welding equipment, which is easy to handle.

The present invention has been developed in view of such requests, and is a method for automatically welding a circular workpiece that forms part of the circumferential surface of a large cylindrical container with reinforcing ribs attached to the outer circumferential surface of the container in an upright position. An object of the present invention is to provide an automatic welding device that can be easily moved to the next welding position even if the reinforcing rib is flanged.

The structure of the present invention achieves this purpose. In a device that automatically welds a circular metal object to be welded, which forms part of the cylinder to be welded, to a large cylinder to be welded with reinforcing ribs attached to the outer circumferential surface in a vertical position, it is possible to straddle the reinforcing ribs above and below the welding point. A platform that can approach and move away from the cylinder is provided on the dolly that is attached to the cylinder, and a vertical position adjustment slide that is movable in the vertical direction is mounted on the platform. Welding of the welding head is carried out by attaching an angle adjustment plate that can be fixed at an arbitrary inclination to the vertical position adjustment slide, and attaching a support arm that supports the welding head to the angle adjustment plate so as to be able to rotate within the horizontal plane. The welding torch can be adjusted perpendicularly to the object to be welded, the welding torch can be rotated around the metal object to be welded, and the welding torch can be controlled by a non-contact sensor disposed on the opposite side of the welding torch. It is characterized by a device installed in the welding head so as to approach and move away from the object to be welded.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

This welding device consists of a truck I that is installed so as to straddle reinforcing ribs 2 and 2' on the upper and lower sides of the welding location, a mount ■ that is attached to this truck I that approaches and moves away from the large cylindrical container 1 that is the material to be welded; A welding head support mechanism (■) is attached to this frame (■) and performs rough vertical and horizontal adjustment when positioning the welding head and, by extension, the welding torch 4 in the groove, and a welding head support mechanism (■) that supports the welding torch 4 and rotates it along the groove. It mainly consists of a head ■.

The trolley I is the face 2 of the reinforcing rib 2 above the metal object 3 to be welded.
It consists of an upper truck 5 that hangs on the upper truck 5, and a lower truck 6 that is applied to the face 2a' of the lower reinforcing rib 2.

A pair of rollers T that sandwich the face 2a of the reinforcing rib 2 and a roller 8 that rolls along the upper end surface of the face 2a are attached to both ends of the upper truck 5.

The roller 7 is configured so that one of its mounting shafts can be slid, and can be held on the face 2a by a handle 9.

On the other hand, a roller 10 that contacts the face 2a' and transfers, and a backing plate 11 that contacts the lower end surface of the face 2a' are attached to both ends of the lower truck 6, respectively.

Then, the sliding shaft 1 is horizontally moved from these upper and lower carts 5 and 6.
2.13 are protruded from each other, and these sliding shafts 12
Sliding members 14.15 are respectively fitted into ゜13 via linear motion bearings, and these sliding members 14.1
A pedestal (2) is installed via 5.

As shown in FIG.
It is mounted on both sides with bolts through slotted holes that allow the angle to be changed.

In addition, in the frame (2), an upper frame 16 and a lower frame 17 are connected by two guide shafts 18, and an upper end plate and a lower end plate are provided at the upper and lower ends, respectively.

An intermediate support frame 19 is fixed to the middle part of the guide shaft 18, and a welding head support mechanism (2) is provided above the intermediate support frame 19, and a distance between the upper truck 5 and the lower truck 6 is provided below. A feed screw 20 is provided between the guide shafts 18 for adjustment.

The lower truck 6 is screwed to this feed screw 20, and the feed screw 20
By turning the handle 21 at the lower end, the lower cart 6 can be moved up and down, and the backing plate 11 can be brought into contact with the lower end surface of the face 2a', and the upper and lower carts 5.6 can be securely attached to the reinforcing ribs 2, 2. Can be installed.

In addition, by adjusting the distance between the sliding member 14.15 fitted into each sliding shaft 12.13 and the upper and lower carts 5 and 6, and adjusting the angle with the upper and lower frames 16.17, As shown in Figure 5 a + b, the pedestal ■ is moved from the unadjusted state (a) to parallel to the large cylindrical container 1 (the state shown in figure 5).
It can be done.

Furthermore, it can be adjusted and fixed parallel to the tapered surface of the large cylindrical container 1 as shown in FIG. 5C.

Vertical position adjustment slide 22 that forms part of the welding head support mechanism ■ that performs rough vertical and horizontal adjustment of the welding head ■
is slidably supported by two guide shafts 18, and is screwed into a position adjustment feed screw 23.

A motor 24 is connected to the upper end of the feed screw 23, and the feed screw 23 can be moved to any position by rotation of the motor 24.

An angle adjustment plate 26 is attached to this vertical position adjustment slide 22 in order to change the attachment angle of the support arm 25 according to changes in the diameter of the large cylindrical container 1 and to make the welding torch 4 face approximately in the centripetal direction. .

The angle adjusting plate 26 is attached at one end by a hinge 27 so as to be freely pivotable in a horizontal plane, and the other end is fixed to the vertical position adjusting slide 22 and screwed to a guide plate 28 having an arcuate groove.

Therefore, as shown in FIG. 6, by changing the screw position within the groove of the guide plate 28, the angle of the angle adjusting plate 26 can be changed to align the welding torch 4 with the centripetal direction.

A support arm 25 that supports the welding head (2) is mounted on the angle adjustment plate 26 so as to be pivotable in a horizontal plane by a hinge 29, and a screw-type clamp 30 is provided to fix the angle at an arbitrary position. (See Figure 6).

A welding head support 31 is fitted into the tip of the support arm 25, and the welding head support 31 can be slid along the support arm 25 to finely adjust the position in the left and right direction.

Furthermore, a sliding table 32 is provided on the welding head support table 31 so that the vertical position can be finely adjusted.
．． It is a feed screw mechanism that can be finely adjusted by turning 34.

The welding head ■ is mounted so as to be suspended from a sliding table 32, and this welding head ■ is equipped with a slide mechanism that supports the welding torch 4 and finely adjusts the position of the metal object 3 to be welded in the radial and axial directions. It also has a rotation mechanism for rotating the welding torch 4 around the metal object 3 to be welded.

This rotation mechanism is a gear box 35 attached to a sliding table 32.
The rotation of the motor 36 is transmitted to the welding torch 4 by a worm wheel provided at the center of the worm wheel and an outer slide tube and an inner slide tube housed inside the worm wheel.

At this time, the worm wheel, the outer slide tube, and the inner slide tube rotate together, but the inner slide tube is configured so that it can also slide in the axial direction.

This inner slide cylinder is driven in the axial direction by a servo motor 37, and is controlled by a non-contact sensor 38 which outputs a signal to maintain a constant distance from the groove.

A mounting plate 39 for the welding torch 4 is fixed to the tip of the inner slide tube, and the welding torch 4 and the non-contact sensor 38 are positioned at diagonal positions via adjustment slides 40 in the radial direction of the metal object 3 to be welded. Installation.

Therefore, when the welding torch 4 is rotated by the motor 36, the non-contact sensor 38 outputs a signal to maintain a constant distance from the bevel, and the servo motor 37 is rotated forward or reverse to follow the hollow shape. .

In welding work using such an automatic welding device, first, the entire welding device is lifted up with a crane, etc., and the upper truck 5 is attached to the reinforcing lip 2.
straddle face 2a.

Then, one of the rollers 7 is made to pinch the face 2a by operating the handle 9, and the lower truck 6 is adjusted by the handle 21 so that the backing plate 11 comes into contact with the lower end surface of the face 2a'.

At this time, the position in the circumferential direction is also approximately adjusted by adjusting the position of the entire truck.

After this, adjust the sliding member 14°150 position and place the mount ■
are parallel to the large cylindrical container 1 as shown in FIG.

Next, the position adjustment feed screw 23 is rotated by the motor 24 to adjust the vertical position adjustment slide 22 so that the rotation center of the welding torch 40 coincides with the center of the metal object 3 to be welded.

Furthermore, in order to position the welding head (2) so as to face the center of the large cylindrical container 1, the angles of the angle adjustment plate 26 and the support arm 250 are adjusted and fixed as shown in FIG.

After this, the positions of the welding torch 4 and the non-contact sensor 38 are further adjusted using the adjustment slide 40, and all adjustments are completed.

Welding is performed by starting the servo motor 37 and the motor 36 for rotating the welding torch 40, and by operating the welding torch 4.

At this time, the welding torch 4 is rotated according to the output of the non-contact sensor 38 while keeping a constant distance from the groove and following a hollow shape.

After the welding is completed, if it is necessary to finish the bead with a grinder or the like, the support arm 25 can be swiveled and evacuated from the welding area, so that the work can be done easily without any obstacles.

Also, when moving to the next welding position, even if face 2
Even if the flange 2c is attached to the sliding member 14.
15, and move the stand ■ outward from the large cylindrical container 1, and move the upper and lower carts 5 and 6 along the reinforcing lip 2, it can be easily moved without hitting the flange 2c. can.

After the movement, automatic welding at the next position can be performed by repeating the above-mentioned operations.

As described above in detail along with the embodiments, according to the present invention, a circular hardware can be automatically welded in an upright position to the surface of a large cylindrical container having an annular reinforcing lip.

Therefore, welding quality and work efficiency are improved, and welding heat input management is easy.

In addition, the installation of the device to the base metal can be done in a short time without any hassle, and even if there is a flange of the reinforcing lip that would be an obstacle when moving to the next welding position, it can be easily moved by avoiding this. be able to.

[Brief explanation of the drawing]

Fig. 1 ayb shows a large cylindrical container to which the present invention is applied, a is a front view with half section, b is a partial perspective view, and Figs. Regarding the embodiment, Fig. 2 is a side view, Fig. 3 is a front view, Fig. 4 is a schematic perspective view extracting the cart and mount, and Fig. 5 a+ b+.
e and FIG. 6 are explanatory diagrams of the adjustment method when attaching the main body of the apparatus. In the drawings, ■ is a truck, ■ is a frame, ■ is a welding head support mechanism, ■ is a welding head, 1 is a large cylindrical container, 2.2 is a reinforcing lip, 2at2a' is a face, and 2b. 2 b/ is a web, 2cs2c' is a flange, 3 is a metal object to be welded, 4 is a welding torch, 5 and 6 are an upper truck and a lower truck, 1
2.13 is a sliding shaft, 18 is a guide shaft, 22 is a vertical position adjustment slide, 25 is a support arm, 26 is an angle adjustment plate, 3
8 is a non-melting sensor, 39 is a torch mounting plate, and 40 is an adjustment slide.

Claims (1)

[Scope of utility model registration request] In a device that automatically welds a circular metal object to be welded, which forms part of the cylinder to be welded, to a large cylinder to be welded with reinforcing ribs attached to the outer circumferential surface in a vertical position, it is possible to straddle the reinforcing ribs above and below the welding point. A platform that can approach and move away from the cylinder is provided on the dolly that is attached to the cylinder, and a vertical position adjustment slide that is movable in the vertical direction is mounted on the platform. Welding of the welding head is carried out by attaching an angle adjustment plate that can be fixed at an arbitrary inclination to the vertical position adjustment slide, and attaching a support arm that supports the welding head to the angle adjustment plate so as to be able to rotate within the horizontal plane. The welding torch can be adjusted perpendicularly to the object to be welded, the welding torch can be rotated around the metal object to be welded, and the welding torch can be controlled by a non-contact sensor disposed on the opposite side of the welding torch. A vertical circumferential automatic welding device characterized in that the device is installed in a welding head so that the welding head approaches and moves away from the workpiece.