JPS6024271A - Device for welding pipe flange - Google Patents

Abstract

PURPOSE:To weld efficiently and simultaneously both inside and outside surface of a flange by chucking the flange of a pipe and rotating the pipe. CONSTITUTION:A flange 2 together with a pipe body 1 is carried into a flange chucking device and is positioned by means of a stopper 9. The flange 2 is chucked by pawls 7 of the chucking device and welding torches 4, 5 are moved to the respective welding points on the inside and outside surfaces of the flange 2 and are fixed. A rotating device 8 is operated and at the same instant a welding machine is operated to start welding sumultaneously the inside and outside surfaces of the flange. The rotation is stopped upon ending of the welding and the torches 4, 5 are retreated. The pawls 7 of the chucking device are released finally and the pipe 1 is carried out.

Description

[Detailed description of the invention] Misfire! J relates to a welding device for simultaneously welding the inner and outer surfaces of a pipe flange.

A conventional example of this type of welding apparatus It is shown in FIG.

Conventional #i As shown in FIG.
Place the torch 4.5 of the welding machine in such a way that it can weld both sides of the flange 20. With the welding machine fixed, rotate the shivive 1 by the rotation of the roller 3 to weld both sides of the flange 20. 3 and 6 were welding at the same time.
is the torch support.

However, the J:ki conventional technique @jc has the following drawbacks. .

(al low':) A vector occurs between 3 and pipe 1,
The rotation of the pipe is not constant, which adversely affects welding quality.

Φ] If the pipe diameter is different, especially if the diameter is small, it is necessary to adjust the roller interval to ensure smooth rotation of the pipe.

Trunk) Pipe 1 If the stem is distorted or bent, the pipe l will not rotate properly.

(d) During the 10 rotations of the pipe, there is a possibility that it will move in the longitudinal direction, causing the target welding position to shift.

(eJ Since the pipes are rotated at the same time, the mounting accuracy of flange 2 has a great influence on #g contact quality.

As described above, due to the above-mentioned drawbacks (a) to (e), efficient flange welding cannot be performed and a large number of man-hours are required. - It is an object of the present invention to provide an apparatus capable of efficiently welding the inner and outer surfaces of a flange at the same time by eliminating the drawbacks of (al to (e)) above.

The pipe flange welding device according to this document that achieves this purpose includes a chucking device that grips the flange of the pipe;
It consists of a rotating device that rotates this chucking device, and a welding device that has welding torches for the inner and outer surfaces of the flange provided on both sides of the rotating device.

In the welding device of the present invention, the flange itself is chucked and rotated, so compared to the conventional method of rotating the pipe with rollers, b) Welding can be performed without being affected by the assembly precision of the pipe and flange, resulting in stable quality. .

(b) Rotation is smooth.

(c) It is easy to rotate even pipes with extremely small diameters.

(If the main body of the vibrator is bent or distorted, welding can be done without being affected by this.

In addition to these advantages (a) to (a), it is possible to weld both the inside and outside of the flange, which improves efficiency.

. An embodiment of the present invention will be explained below with reference to FIG.

In Figure 2, the ltj pipe body, 2 is the flange, 4
and 5 are welding torches for the inner and outer surfaces of the flange, 6 torch support stands, 7 are the claws of the flange chucking device, and 8
(1) rotates the flange simultaneously with the housing chucking device after chucking, 9 is a stopper for positioning when inserting the flange, and 10#'i is a pedestal for the entire device.

The welding machine and the converting device 8 are arranged integrally on the pedestal 14. Two welding torches 4.5 are placed on both sides of the converting device 8, and when carrying in and out pipes. It is now possible to evacuate.

To weld pipe flanges with this device, (1)
lf, the Ky flange together with the pipe body 1 are carried into a flange chucking arrangement, and positioned using the stopper 9.

(2) Chuck the flange 2 with the claw 7 of the chucking device.

(3) Move the welding torch 4.5 to each welding location on the inner and outer surfaces of the flange 2 and fix it.

(4) Activate the rotating device, operate the welding machine at the same time as the cracking, and start welding both the inner and outer surfaces of the flange at the same time.

(5) After welding, stop the rotation and turn the welding torch 4.5
evacuate.

(6) Finally, release the chucking claw 7 and take out the pipe l.

As mentioned above, since the present invention rotates the pipe by chucking the flange of the pipe, compared to the conventional case where the pipe itself is rotated by rollers,
It has the effect of The present invention having such effects can be applied to all types of flange welding of pipes.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing a conventional pipe flange welding device, and FIG. 2 is a schematic side view showing an example of an undeveloped pipe flange welding device of the 2000s. In the drawing, l is the pipe body, 2 is the flange, 4 and 5 #i welding torches, 7Fi flange chucking device claw, and 8 is the rotating device. . Patent applicant: Mitsubishi Heavy Industries, Ltd. Patent attorney: Shibu Hikari (1 person)

Claims (1)

[Claims] A pipe flange consisting of a chucking device that grips the flange of a pipe, a rotating device that can rotate this chucking device, and a welding device that has welding torches for the circular and external surfaces of the flange provided on both sides of the rotating device. Welding equipment.