JPS60221178A - Welding device - Google Patents

Abstract

PURPOSE:To provide a profiling device which obviates positional deviation in an advancing direction by forming a sensor contactor into a Y shape, lining up the tips of the contactor and the wire part of a torch approximately in alignment in the direction perpendicular to a weld line and disposing the same to a moving body. CONSTITUTION:The contactor 1 of the contact type sensor is formed into the Y shape and the tips 1', 1' of the contactor 1 and the wire part of the welding torch 2 are lined up approximately in alignment in the direction orthogonal with the weld line 18 and are disposed to the front end side of a boom 8 of a moving carriage. The torch 2 is disposd to the top end of the boom 8 via a jig 6 for adjusting the torch position and further the contactor 1 is disposed thereto via a device 3 for adjusting a profiling position. The contactor 1 is then positioned within a groove by the automatic operation of the profiling device and the position of the torch 2 is matched with the weld line. Welding is executed while the weaving condition is checked by a video camera 5. The welding device which obviates positional unconsidence in the advancing direction is obtd.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a welding device equipped with a contact type copying device.

(Prior Art) A welding device equipped with a conventional contact-type copying device generally has a contactor disposed 20 to 100 mm in front of the welding torch 2, as shown in FIG. According to this conventional device, when a weld line with a large curvature changes, the contact position a
The displacement between the position of the welding torch and the position of the welding torch is such that it does not pose a problem during the actual work.

However, for a welding line C with a bend as shown in FIG.
It moves as shown by the broken line in the figure, making it difficult to perform the required copying function. In addition, in order to solve these problems, delay circuits have been conventionally installed in the control system of copying devices, but this not only complicates the circuit, but also requires correction for the welding torch in the copying device of the welding head. Since it is necessary to provide a sliding unit and a correction sliding unit for the sensor, the welding head has a large structure, making it difficult to weld in narrow areas.

(Object of the invention) The present invention forms a contact of a contact type sensor in a Y shape, and connects the tip of the Y-shaped contact and the wire of a welding torch in a direction substantially perpendicular to the welding line. To provide a device capable of correcting the position of a welding torch by arranging it in a line and disposing it on a movable body, without causing any mismatch in position with respect to the direction of welding progress.

Further, in the second aspect of the present invention, the wire portion of the welding torch and the tip end of the Y-shaped contact are positioned substantially in line with each other, and are placed on the tip side of the boom connected to the movable trolley.

In this arrangement, the welding torch is placed via a riving device, and the Y-shaped contact is placed on the tip side of the boom via a copying position adjustment device, and a TV camera, video camera, etc. To provide a welding device that does not cause positional mismatch during welding by providing a welding device. That is, the present invention provides an apparatus for use in gas metal arc or submerged arc welding, for example, for internal welding of legs for ribs of offshore structures.

(Structure of the Invention) An example of the welding apparatus of the present invention will be described below with reference to the drawings. The contact of the contact type sensor is formed into a Y-shape as shown in FIG.
' is aligned with the welding torch 2 in a direction orthogonal to the welding line 18, and the Y-shaped contact 1 and the welding torch 2 are arranged at the tip of the movable body 8 shown in FIG. In the apparatus of the present invention, for example, as shown in FIG. 1(a), the welding torch 2 is always positioned at the required welding line while contacting along the welded materials 19 which are butted against each other in a V-shape. Perform welding. That is, the present invention detects changes in the welding line position during automatic welding by placing the Y-shaped contact 1 in contact with the welding torch 2 in a location where there is no displacement in the welding line direction with respect to the welding line direction. However, the welding torch position can be corrected and automatic welding can be performed without causing any positional discrepancy with respect to the welding progress direction. Of course, the movable table on which the welding torch 2 and the Y-shaped contact 1 of the present invention are arranged can be implemented using devices commonly used at present, depending on the shape and conditions of the materials to be welded.

Next, the second invention will be explained with reference to FIG. 2.3.

Reference numeral 13 in FIG. 2 indicates an object to be welded. For example, the approximate dimensions are an inner diameter of 750 II 1 m, a length of 14 m, and C a welding line. 10 is a rail for running the bogie, 9 is a running bogie, II is a control panel for the welding device, and 12 is a welding power source.

Reference numeral 8 denotes a boom that connects the traveling carriage 9 and the welding head section, and FIG. 3 shows the details of the welding head section.

In FIG. 3, 4 is a zoom support copying roller.

5 is a video camera; 17 is a video camera position adjustment device, and the jig 17 allows the angle of the video camera 5 to be adjusted. 3 indicates a copy adjustment device. In this example, the adjusting device g13 includes contact position adjusting jigs 14 and 15 that can be moved vertically or horizontally with a screw shaft and that adjust the angle of the contact.
．． 18, and the copying adjustment device 3 is configured to operate automatically at all times, but to be able to operate manually in an emergency. Reference numeral 6 indicates a welding torch position adjustment jig, and 7 indicates a welding torch riving device for riving the welding torch 2. The welding torch 2 is connected to the boom 8 via the riving device 67.
attached to the tip of the 6 indicates a welding torch position adjustment jig.

(Operation of the invention) The operation of the welding device of the invention will be explained. In FIG. 2, the carriage 9 on the carriage rail 10 is inserted to the welding start position by operating the control panel 11. At this time, the welding torch 2 and the copying contact 1 switch the operation of the copying device from automatic to manual and manually move the sliding unit 3 upward to prevent the welding torch 2 from being damaged when the copying contact 1 is moved. .

Change the operation of the copying device from manual to automatic before welding starts. The tracing contact automatically comes into contact with the groove as shown in FIG. In addition, when adjusting the sensor contact position, +4
．． 15. Move the 1θ contact position adjustment jig to make adjustments. Move the welding torch position adjustment jig No. 6 to adjust the welding torch so that it has the positional relationship shown in FIG. Next, the direction of the video camera 5 is adjusted using a video camera position adjustment device 17. Check the living condition of the living device in step 7. Riving is used to reduce the probability of welding defects such as insufficient penetration by ensuring left and right penetration during welding and improving the shape of penetration. The purpose is to reduce the incidence of defects even when the welding position shifts.

Welding begins after confirming the truck speed, welding conditions, riving conditions, and that the copying device is set to automatic copying. During welding, the operational status of the copying device is monitored on a television monitor attached to the operation panel 11 on the trolley. if,
If a problem occurs with the copying device, copying is switched from automatic to manual and welding is performed while watching a television monitor.

The boom support and copying roller 4 has a structure in which the roller always falls to a fixed position at the welding line 111C due to the boom's own weight, and the curvature of the welding line C is extremely large compared to the distance between the roller 4 and the welding torch 2. It functions as a copying device.

Although the above-mentioned device is used as an inner surface welding device for small diameter and long pipes, it can also be applied to circumferential welding of pipes. In this case, the rail 10 in Figure 2. Trolley 9.
The poom 8 is not necessary, and the welding hent portion shown in FIG. 3 may be mounted on a normal manipulator or the like. Also, the video cameras 5 and 17 in FIG. 3 are not required if the operator can directly monitor them. Automatic welding is possible according to the first invention.

(Effects of the Invention) As described above, according to the present invention, since a delay circuit is not required for the displacement of the weld line position, the electrical control function and mechanical correction device are simple, and the device is inexpensive. It can also be applied to welding in narrow spaces.

[Brief explanation of the drawing]

Figures 1 (a) and (o) are positional relationship diagrams of the copying contact and welding torch in the present invention, Figure 2 is an overall side view of the present invention, Figure 3 is a detailed side view of the present invention, and Figure 4. (stomach). (C1) is a front and side view of the conventional device, and FIG. 5 shows the difference in the trajectory of the contact and welding torch in the conventional device. DESCRIPTION OF SYMBOLS 1... Y-shaped contact, 2... Welding torch 3... Sliding unit for copying device 4... Roller, 5
...Video camera 6...Welding torch position adjustment jig 7...Living device, 8...Boom 9...Traveling trolley, 10...Rail for trolley 11...Welding device control operation panel , 12...Welding power source 14.15.16...Copying contact position adjustment jig 17...Video camera position adjustment jig Patent applicant Representative patent attorney Tomoyuki Yafuki (and one other person)

Claims (2)

[Claims] (1) The contact of the contact type sensor is formed into a Y shape, and the tip of the Y-shaped contact is placed in a direction perpendicular to the welding line.
Line it up almost in line with the installed welding torch,
A welding device in which a welding torch and a Y-shaped contact are movably disposed on a movable body so as to be able to correct the position of the welding torch without causing positional discrepancies during welding. (2) A welding torch is installed at the tip of the boom connected to the moving truck via a riving device, and the contact of the contact type sensor is formed in a Y shape, and the tip of the Y-shaped contact is The Y-shaped contact is placed in a position substantially in line with the welding torch in a direction perpendicular to the welding line, and the Y-shaped contact is placed on the boom via a position adjustment device, and an image is received near the Y-shaped contact. The welding device is constructed such that the welding torch position can be corrected without causing positional discrepancies during welding by positioning the welding torch on the same boom.