JPS623881A - Two point simultaneous welding equipment for flange of straight pipe - Google Patents

Abstract

PURPOSE:To avoid the finishing work on the flange surface after welding, to simplify the mechanism and to increase the welding efficiency by providing each positioning means, etc. of each welding torch and flange of the inner and outer faces and by performing an MAG welding of the outer face simultaneously with performing a TIG welding of the inner face of the flange. CONSTITUTION:A flange 17 positioning truck mechanism 16 is advanced by hydraulic cylinder 14, the flange 17 is clamped and located by rollers 20, 21 and the inner face welding torch 18 provided on the mechanism 16 is located for the longitudinal direction of a pipe 12. The height adjustment of the torch 18 is performed automatically by an electric sliding unit 19. The outer face welding torch 41 is moved downward by a hydraulic cylinder 30, the pipe 12 is profiled by a profiling roller 36 and after its pushing up a profiling mechanism 39, the cylinder 30 is stopped and located by a limit switch 38 and simultaneously a welding earth 33 is pressed for positioning by a spring 34 onto the flange 17. The inner face of the flange 17 is subjected to TIG welding with the torch 18 by turning the pipe 12 and simultaneously the outer face to the MAG welding by the torch 40.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a straight pipe flange two-point simultaneous welding device,
It is used for welding straight pipe flanges for I-equipped pipes.

[Conventional technology]

As is well known, straight pipes and main tube flanges are generally welded on both the inner and outer surfaces using a consumable electrode welding method such as the C02 welding method. By the way, in the consumable electrode welding method, spatter is generated and welded to the base metal, and after welding, it is necessary to perform surface finishing using a grinder, etc., and the inner surface of the flange is especially essential to prevent leaks during piping. It is a lot of work. In addition, when such welding is performed using a mechanical device, as shown in FIG. When the external dimensions of the flange 2 change, it is necessary to change the positions of the welding torch 3 and welding ground 4, and in most cases, the main rib 1 is moved in the longitudinal direction of the welding tube (arrow A) during welding. The welding torch 3 is equipped with a tracing mechanism to allow the welding torch to move forward (to rotate the pipe).

[Problem that the invention seeks to solve]

However, in consumable electrode welding methods (such as CO2 welding), spatter is generated and adheres to the base metal, so it is necessary to finish the surface with a grinder etc. after welding. Welding precision is required to prevent leaks. Furthermore, if the welding is difficult and is performed by a mechanical device, the positions of the welding torch 3 and the welding ground 4 must be changed every time the external dimensions of the pipe 11 and flange 2 change. Furthermore, in most cases, the pipe I moves in the longitudinal direction of the pipe during welding, so a tracing mechanism for the welding torch 3 must be provided. Therefore, the area around the welding torch of the mechanical device has a very complicated structure and is prone to failures.

The present invention has been made in view of the above circumstances, and it eliminates the flange surface finishing work after welding by sputter welding, eliminates the step of pipe flanges, simplifies the setting of the welding torch and welding ground, and improves the mechanism. It is an object of the present invention to provide a simple and efficient straight pipe flange two-point simultaneous welding device.

[Means to solve all problems]

The present invention provides a flange positioning trolley mechanism provided with an inner welding torch, a roller mounted on the trolley mechanism for clamping the flange, an electric slide unit mounted on the trolley mechanism for positioning the inner welding torch, and the trolley mechanism. Connected to nine hydraulic cylinders, connected to this hydraulic cylinder and then connected to the torch copying roller and welding ground,
A limit switch and a spring are provided for positioning the hydraulic cylinder, and the inner surface of the flange is TIG welded while the outer surface of the flange is MAG welded, thereby avoiding flange surface finishing work after welding. , which aims to simplify the mechanism and improve welding efficiency.

[Effect]

According to the present invention, (1) By employing the TIG welding method for welding the inner surface of the flange and by employing the MAG welding method for welding the outer surface, the flange surface finishing work after welding by sputter welding can be completely eliminated.

■ Welding can be performed efficiently by welding both the internal and external electrodes at the same time.

■ During operation of the equipment, the welding is performed by positioning the pipe flange by clamping it with two rollers, which eliminates the need to move the pipe flange during welding, and also makes it easier to set the welding torch and welding ground. It can be simplified and the mechanism can be simplified.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Here, FIG. 2 shows a cross-sectional view taken along the line XX in FIG. 1.

11 in the figure is a roller stand. Turning rollers 13, 13 mounted on the middle eaves 12'j4 are provided on the upper part of the roller stand 11, and a hydraulic cylinder 14 is provided on the side. A flange positioning cart mechanism 16 is connected to this hydraulic cylinder 14 via an LM guide 15.

An inner welding torch 18 for welding the inner surface of the flange 17, an electric slide unit 19 for adjusting the height of the torch 18, and a roller 20°2 for clamping the flange 17 are installed on the O-carriage mechanism 16, respectively. There is. The electric slide unit 19 is automatically driven up and down by a signal from an arc sensor so that the torch height remains constant while the internal welding torch 18 is welding.

The electric slide unit 19 is provided with an arc del chisi controller 22 that finely adjusts the slide of the inner welding torch 18 and an electric motor (not shown) that drives the electric slide unit 19. In addition,
23 in the figure is a drive motor that drives the turning roller 13vi via a chain 24.

In addition, 25 in the figure indicates a TIG welding machine main body 26, a MAG welding machine main body 27, and a hydraulic unit 2 for each hydraulic cylinder.
8 is installed on the arm.

Hydraulic cylinders 29 and 30 are suspended from the arms 25, respectively. Here, one hydraulic cylinder 2
9 is provided with a pipe pressure roller 31 that pressurizes the pipe 12 to make the rotation of the pipe 12 smooth and at the same time prevent it from springing up. The other hydraulic cylinder 3
0 is connected to a welding ground 33 via a connecting fitting 32. Here, the pressure of the welding ground 33 is adjusted by a spring 34. Further, the hydraulic cylinder 30 is provided with a copying roller 36 via a connecting fitting 32.35''f.The copying roller 36 slides up and down with its pressure adjusted by a spring 37, and there is a limiter near the copying roller 36. switch 38f: has this to limit the sliding of the hydraulic cylinder 30.The connecting fitting 35 is provided with an external welding torch 40 via a copying mechanism 39.In addition, 41 in the figure is the internal welding torch 40. Torch 18, external welding torch 4
A torch mount that functions as a handle for fine adjustment of 0.
42 indicates a guide cover for the hydraulic cylinder.

Next, the operation of the welding apparatus having the following structure described above will be explained.

First, when the start button of the control device is pressed, the flange positioning cart mechanism 15 is moved forward by the hydraulic cylinder 14. Then, the roller 20 pushes out the seventh langue 17, moves the second flange 17, and clamps and positions the flange 17 with the roller 2. At this time, since the inner welding torch 18 is provided on the bogie machine #115, the flange 1
At the same time as positioning 7, the pipe is positioned in the longitudinal direction 43VC.

The height of the internal welding torch 18 is adjusted by the electric slide unit 19 according to the distance set in advance by the control device.
This is done automatically by driving the

On the other hand, the external welding torch 40 is lowered by the hydraulic cylinder 30, the copying roller 36 copies the pipe 12, and the copying t!
11! After pushing up t39'x, limit switch 38
Stop the hydraulic cylinder 30t and position it. Note that the adjustment in the longitudinal direction 44 does not need to be changed even if the thickness of the flange 17 changes because the flange 17 is pressed against the roller 21. Further, at the same time as the positioning, the welding ground 33 is pressed onto the flange 17 by the spring 34 and positioned.

Then, the copying mechanism 39 is slid by the spring 37,
Furthermore, the pipe pressure roller 31 is pressed by the hydraulic cylinder 29.
adjusted and set the via”12, and this 724
The 112% turning roller 3 is rotated by the drive motor 23 to weld the inner and outer surfaces of the flange 17 to the two electrodes.

According to the present invention, the inner surface of the flange 17 is sig welded by the inner welding torch 18, and the outer surface is MAG welded by the outer welding torch 4o. Finishing can be abolished.

Further, by simultaneously welding the inner and outer surfaces of the flange 7 with two electrodes, welding can be performed efficiently. Furthermore, since the flange 7 is clamped and positioned by the two rollers 20, 21, the setting of the inner welding torch 18, the outer welding torch 4o, and the welding ground 33 can be simplified. For the same reason, even if the thickness of the flange 17 changes, it is no longer necessary to change the position of the torch relative to it, so the structure of the welding torch tracing mechanism has become simple, as it only needs to be moved in the vertical direction. .

〔Effect of the invention〕

As described in detail above, the present invention provides a two-point simultaneous welding device for straight pipe flanges with excellent performance that avoids the flange surface finishing work after welding, simplifies the mechanism, and improves welding efficiency. Can be provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a straight pipe flange two-point simultaneous welding device according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, and Fig. 3 is a problem with the conventional technology. FIG. 11...Roller stand, 12-...Nosei! , 13...
Turning roller, 14, 29. 30... Hydraulic cylinder, 16... Flange positioning cart mechanism, 17...
7 Lands, 18...Inner welding torch, 19...Electric slide unit, 20.21...Roller, 22...
・The arc is the Rutage controller, 25... Hydraulic unit, 26... TIG welding machine main body, 27... MAG welding machine main body, 28... Hydraulic unit, 3 No. 9 Ig addition. Pressure roller, 32.35... Connection fitting, 33...
・Welding ground, 34, 3: Spring, 38: Limit switch, 39: Copying mechanism, 40: External welding torch, 41: Torch mount, 42: Guide cover

Claims (1)

[Claims] A straight pipe flange two-point simultaneous welding device that performs simultaneous welding of a pre-assembled flange and a straight pipe, comprising: a flange positioning trolley mechanism provided with an inner welding torch; a roller mounted on the trolley mechanism for clamping the flange; and the trolley. an electric slide unit mounted on a mechanism for positioning the internal welding torch; a hydraulic cylinder connected to the dolly mechanism; an external welding torch connected to the hydraulic cylinder; a torch copying roller; and a welding ground; and positioning of the hydraulic cylinder. What is claimed is: 1. A straight pipe flange two-point simultaneous welding device, comprising: a limit switch and a spring for welding a straight pipe flange, and simultaneously performing TIG welding on the inner surface of the flange and simultaneously performing MAG welding on the outer surface of the flange.