JPS6120670A - Twin torch type fillet welding equipment - Google Patents

Abstract

PURPOSE:To provide the titled device welding simultaneously both sides of the rib material against the base material with high efficiency and high quality irrespective of the crossing angle thereof. CONSTITUTION:The center part 12 of the arm 11 supporting the torches 1, 1' of which axis is intersecting at right angles is fitted freely rotatably in circular arc inside the plane face of the axial line centering around the crossing point P of the axial line to a supporting arm frame 13. The center part 12 of the supporting arm is moved by the half angle gamma of the inclinating beta against the perpendicularity of the rib material 7 against the base material 6. With the simultaneous welding from both sides of the rib material 7 with the condition thereof the welding is executed with high efficiency and high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a twin fillet welding device suitable for simultaneously welding fillet welds on both sides of a structural rib member.

(Conventional technology) Horizontal fillet welding is often performed on general steel structures, and welding methods include manual welding, highly efficient gravity welding,
Semi-automatic Co2. MA() welding, no gas welding, etc. are used. In such joints, fillet welding is usually performed on both the left and right sides, and automatic welding is often performed to further improve efficiency. In this case, as shown in Figure 4, Two torches 1 on the left and right of the rib material 7,
They are simultaneously welded with a 1° angle. Devices for this method include QO2 and MAG as shown in Figure 5+j).
, bipolar arm 2 holding a no-gas welding torch 1,1°
A device for automatically welding by driving an automatic traveling device 3 that moves on a rail or trackless along a welding line, as shown in FIG.
A device for automatically welding using an automatic traveling device 3 that moves using the surface as a guide is used.

(Problems to be Solved by the Invention) However, none of the above-mentioned devices is applied to the case where the rib material 7 to be welded is arranged vertically to the base material plate 6 where the work to be welded is arranged horizontally. In most cases, the rib material 7 is not perpendicular to the base material plate 6 as shown in FIG.
- In cases where these devices are placed in a state where they can be used, these devices are either unusable or, even if they can be used, are extremely complicated and difficult to use in practice. That is, in such horizontal fillet welding, the inclination angle of the welding torch (α in Fig. 6) is generally
It is best to weld with the angle between the rib material 7 and the rib material 7 at X: 1/2 in order to obtain a welded part with equal leg length and high quality.
It is said that Therefore, in the case where the plate 6 and the lip material 7 are arranged at a normal right angle, the torch inclination angle is often about 45 degrees. However, as shown in FIG. 6, when the rib material 7 is not perpendicular to the plate 6, that is, when it is arranged as a diagonal material, when performing fillet welding on the left and right sides, the torch inclination angle will naturally be Normally, it is desirable to set the torch inclination angle at g1/2 with respect to the left and right obtuse and acute angles formed by the plate and lip. In some cases, each of the bipolar welding apparatuses described above is provided with a semi-fixed variable torch inclination jig 8 at the torch holding location, as shown in FIG. However, in these cases, it is necessary to manually reset the torch angle on both the left and right sides with respect to the inclination of the vertical rib material 7. Setting the torch angle is extremely complicated and difficult in practice, which is disadvantageous in maintaining the equilateral length of welding, and is also a cause of deterioration in welding quality.

(Means for Solving the Problems) The present invention is applicable to simultaneous welding using twin torches inside corners on both sides of a base plate where ribs are arranged perpendicularly or at an angle. The purpose of this project is to provide a device that can easily set the torch angle by avoiding the trouble of adjusting the left and right torch inclination angles individually. is attached to a common support arm, and the center part of the support arm is mounted on the support arm frame so that it can rotate at any angle within a plane containing both torches, centering on the intersection of the axes of the two torches. This paper proposes a twin-torch type fillet welding device that is characterized by:

(Function) With the twin fillet welding apparatus of the present invention having the above configuration, the left and right torches can be adjusted independently by simply adjusting and moving the central part of the support arm and the mounting part of the support arm frame. Therefore, the correct torch angle can always be set even for inclined rib materials.

(Embodiment) An embodiment of the twin-type fillet welding apparatus of the present invention will be described with reference to FIGS. 1 to 3.

In FIG. 1, two torches 1 and 1' are supported by a common support arm 11 via their holding parts 9 and 9" and holding arms 10 and 1σ, and the two torches 1 and
, 1゛ axes intersect at right angles P on the plane perpendicular to Lip 7.
They are arranged so that they intersect. The center portion 12 of the support arm 11 is fitted into the circular arc slit 14 of the support arm frame 13. The support arm 11 is slidably supported in the arcuate slit 14 by the action of a rack 15 provided in the arcuate slit 14 and a pinion (not shown) of the support arm central portion 12. The support arm frame 13 is connected to an automatic traveling device (not shown).

The two torches 1, 1', their holding parts 9, 9'', holding arms 10, 10', and support arm 11 are normally fixed.The positioning of the torches 1, 1'' depends on the diameter of the wire used, etc. In order to obtain the optimum wire extension, the installation length is adjusted using the adjustment jig provided on the torch holding parts 9 and 9'.In this state, the rib material 7 is vertical to the normal base material plate 6 When welding the materials to be welded that are arranged in FIG. If welded in this state, the angle of inclination between the base plate 6 and the rib member 7 of both torches 1 and 1' will be 45°, which makes it possible to set a preferable torch inclination angle.

If the rib material 7 is inclined with respect to the base material plate 6, the second
As shown in the figure, the fixed state between the center part 12 of the support arm 11 and the support arm frame 13 is released, and the center part 12 is manually or automatically moved within the circular arc slit 14, and the center part 12 and the original A position 12' where the angle formed with the perpendicular line on the base material plate 6 is an angle γ which is exactly 1/2 of the inclination angle β of the rib material 7.
Move it to that point and then fix it. This is explained in detail geometrically as shown in FIG.

That is, both torches 1, 1°, torch holding parts 9, 9'.

In a pentagonal 00EFD consisting of support arms 11, etc., both 1
・If the angle (/C0D) formed by the axis of the -chi is set to 90°, if the center part ゛r of the support arm 11 and EF is on the line 0M perpendicular to the base plate surface A+3, /aoM= / D
oM = 90'/2 = 45°, and the torch axis Co, DC
is exactly 1 degree 1/2 of the 90° angle formed by the rib material and the base material grate.
A proper torch tilt angle is formed at 45°.

At this time, when the rib material 7 is inclined by an angle β with respect to the base material plate 6 and its central axis OM comes to a position where it becomes OM', the T point is moved on the arcuate slit 14 of the support arm frame 13. /T'OM-β/2-γ is reached at a position T°. The pentagon 00EFD mentioned above maintains its shape somema\, and the angle β/ with 0 in the center
Pentagon Q rotated by 2-γ QI E I F+ p
It becomes l. At this time, the torch inclination angle is 2o・OM'-10・0A with respect to the rib material 7 and the base material plate 6.
=45'+r-1,<M' OA and Boyl-/D'oB=45°-γ=1/, ○■3, both torches 1.1' rib material 7-base material plate 6
This is exactly 1/2 of the angle between the two, and an appropriate torch inclination angle is formed.

In this way, in the device of the present invention, the central portion 1 of the support arm 11
By simply adjusting and moving the support position of the second support arm to the frame 13, the correct torch angle can be set for the always inclined rib member 7 without adjusting the left and right torches individually.

Note that if an angle scale 15 is provided along this arcuate slit 14 as shown in FIG. Can be set relatively easily and accurately. Retention of calluses.

It is also easy to automate the sliding mechanism by providing a drive motor and a control device with a position or travel distance detector.
The movement setting can also be easily performed.

(Effects of the Invention) When performing horizontal fillet welding on both sides of an inclined rib material with a twin torch at the same time as described above, by employing the twin torch type fillet welding device of the present invention, it is possible to perform simple and simple fillet welding. It is possible to accurately set the correct torch angle for the inclined rib material, allowing for highly efficient and high quality welding.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of an embodiment of the twin torch fillet welding device of the present invention, Figs. 2 and 3 are explanatory diagrams of the same operation, and Fig. 4 is a conceptual diagram of twin torch fillet welding. Figure 5 (
1) (11) is a schematic diagram of a conventional twin torch type device, and FIGS. 6 and 7 are diagrams of the torch inclination mode when the rib is inclined. 1.1':)-chi, 11: Support arm, '12: Support arm center part, 13: Support arm frame, 14: Arc slit. ;N Rijin↓(duration t 7';"I"25 No. 10 No. 27 Fig. 3

Claims (1)

[Claims] The two torches are mounted on a common support arm, keeping the angle formed by the intersecting axes of both torches at 90°, and the center part of the support arm is placed in a plane that includes both torches with the center of the intersection of the axes of both torches as the center. A twin torch type fillet welding device, characterized in that the twin torch fillet welding device is mounted on a support arm frame so as to be able to rotate at any angle.