JPH10202394A - Mirror body automatic welding supporting device and mirror body automatic welding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an automatic welding supporting device and an automatic welding method to weld a mirror plate of a mirror body of a large size pressure vessel along the longitudinal welding line. SOLUTION: A welding condition following to the change of welding attitude of an automatic welding machine 17 to move through a welding arm 14 installed along the curved face of a mirror body 11 of a large size pressure vessel is set, the pre-set welding condition is selected corresponding to the welding attitude and the longitudinal welding of the mirror body 11 with the automatic welding machine 17 is controlled automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding support apparatus for a mirror body for performing longitudinal welding of a mirror body using an automatic welding machine while a lens body of a large pressure vessel is fixed, and an automatic mirror body. It relates to the welding method.

[0002]

2. Description of the Related Art FIG. 2 is an external view showing an entire large pressure vessel to which the present invention is applied. The pressure vessel usually includes a hemispherical mirror body 11 and a body 21, and a plurality of divided mirror plates 11 a are welded to each other along a longitudinal welding line 22 to form a mirror body 11 having an integral structure. . In the prior art, the following two welding methods are used for the longitudinal welding line 22 of the lens body 11.
There was a way. (1) As shown in FIG.
3, the automatic welding machine 17 is installed on the manipulator 32, and the positioner 31 is tilted, the end plate 11 a is welded along the longitudinal welding line as shown by the broken line in FIG. , A welding method that performs setup change of welding work. (2) As shown in FIG. 4, the mirror body 11 is placed on the gantry 12, the scaffold 41 is set near the longitudinal welding line 22, and welding is performed along the longitudinal welding line 22 by manual welding by a welding operator. How to do.

[0003]

According to the prior art shown in FIG. 3, in order to perform automatic welding using the positioner 31 and the manipulator 32, the size of the positioner 31 is limited. Could not be installed on the positioner 31 and automatic welding was sometimes impossible. Also, the mirror body 11 is a large heavy object, and mounting it on the positioner 31 often necessitates work at high altitudes and involves danger. Further, in the manual welding operation shown in FIG. 4, there are problems in that the welding operation time is increased, the operation efficiency is reduced, and the quality of the welded portion is maintained. For this reason, from the viewpoint of work efficiency and quality improvement, for the mirror body 11 having a large diameter,
The transition to automation of welding work was considered essential.
The present invention solves the above-mentioned problems, and performs welding control by an automatic welding machine that travels on a rail provided substantially in parallel along a curved surface of a mirror body, and an automatic welding support device for welding a mirror body of a large pressure vessel. And an automatic welding method of the mirror body.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a welding arm provided along a curved surface of a body of a large pressure vessel, and a welding position of an automatic welding machine moving through the welding arm. It is possible to automate the longitudinal welding of the body of a large pressure vessel by an automatic welding machine by appropriately setting the welding conditions and selecting the preset welding conditions according to the welding position. Is controlled.

Thus, the welding of the longitudinal welding line of the mirror body is
The welding is performed by running the automatic welding machine on the rail, so that welding work can be performed without tilting the mirror itself, and setup change is performed by rotating the welding arm in the circumferential direction of the mirror. Because you can
There is no need to move the mirror itself. This eliminates the need to mount the mirror on the positioner, thereby eliminating the need to work at heights to mount the mirror on the positioner and the dangerous work of moving the huge mirror itself, and to perform welding work. This is effective in preventing accidents due to the change in setup, and improves the work efficiency.

The present invention can be applied not only to MAG welding and TIG welding suitable for welding a body and a mirror body of a pressure vessel, but also to covered arc welding and submerged welding.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic welding method for a mirror body according to the present invention will be described with reference to the drawings. FIG. 1 is a view showing the appearance of a lens body holding device in a lens body fixing type automatic welding method according to the present invention. In FIG. 1, the mirror body 11 is placed and fixed on the gantry 12 so that the bowl is turned down, that is, the curved surface of the mirror body 11 is convex upward. The mirror holding device includes a cylindrical column 13 erected at the center of the mirror 11, a welding arm 14 symmetrically arranged around the cylindrical column along the curved surface of the column 11, A carriage 15 is provided so as to be able to roll freely along the outer periphery of the carriage 12. Welding arm 1
4 is supported by the cylindrical column 13 and the carriage 15.
Further, a welding rail 16 is provided on the welding arm 14, and the automatic welding machine 17 is engaged with the welding rail 16 to
It is configured to be able to travel along one curved surface. The running of the automatic welding machine 17 and the control of work conditions related to welding are as follows.
Together with the rotation control of the welding arm 14 described below, it can be configured to be implemented in a control room (not shown).

The welding arm 14 is configured to be rotatable around the cylindrical column 13 in the circumferential direction of the mirror body 11 by a control device (not shown).
The automatic welding machine 17 can be moved along 2 and the setup can be easily changed. When the automatic welding machine 17 moves upward from the carriage 15 in the direction of arrow A, the welding posture changes from a vertical position to a downward position. Along with this change, a change in the welding conditions is performed. This change condition can be implemented during welding work by selecting a preset welding condition using the welding condition selection button of the control box of the automatic welding machine 17 corresponding to the welding position. There is no need to interrupt. Table 1
FIG. 1 shows an example of such welding conditions.

[0009]

[Table 1]

[0010]

According to the present invention, it is possible to carry out welding of the longitudinal welding line of the mirror body without inclining the mirror body by running the automatic welding machine along the curved surface of the mirror body. The setup change is easily performed by moving the arm of the mirror holding device, and there is no need to rotate the mirror.Therefore, there is no need for a positioner that holds the mirror as in the past, and dangerous work at height Can be abolished,
The efficiency and safety of welding work can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing an appearance of a lens body holding device in an automatic lens welding method according to the present invention.

FIG. 2 is an external view showing the whole of a large-sized pressure vessel to which the present invention is applied.

FIG. 3 is a view showing a conventional method for automatically welding a large-sized pressure vessel using a positioner and a manipulator.

FIG. 4 is a view showing a conventional method of manually welding a large pressure vessel by manual welding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Mirror 11a ... End plate 12 ... Stand 13 ... Cylindrical column 14 ... Welding arm 15 ... Dolly 16 ... Rail 17 ... Automatic welding machine 22 ... Longitudinal welding line 31 ... Positioner 32 ... Manipulator 41 ... Scaffold

Claims (2)

[Claims] 1. An automatic welding support apparatus for welding a plurality of substantially fan-shaped head plates arranged radially to each other to form a hemispherically curved mirror body, wherein the mirror body has a curved surface protruding upward. A circular mount on which the mirror is mounted, a cylindrical column erected at the center of the mirror, a bogie provided rotatably along the outer periphery of the mount on which the mirror is mounted, and the cylinder A welding arm disposed symmetrically about the column along the curved surface of the mirror body and supported by the cylindrical column and the bogie; a rail provided on the welding arm; An automatic welding machine that runs, a driving unit that rotates the welding arm in a circumferential direction of the mirror body, and a control device that controls a change in welding position and welding conditions associated with the traveling of the automatic welding machine. And automatic welding support equipment. 2. A method of automatically welding a plurality of substantially fan-shaped head plates arranged radially to form a hemispherically curved head body, wherein the curved surface of the head body is fixed to be convex upward. Performing an automatic welding machine through a welding arm provided along the curved surface to weld the radial head plate along a longitudinal welding line, and circumferentially connecting the welding arm to the head body. And rotating the lens body.