JPH0225280A - Automatic fillet welding device - Google Patents

Abstract

PURPOSE:To improve workability and accuracy of welding by providing magnet attraction type driving rollers to a welding carriage, disposing a profiling lever which advances and retreats diagonally in a fillet part direction and pressing the welding carriage to a vertical plate, then executing welding. CONSTITUTION:A pair of the magnet attraction type rollers 5 in contact with the vertical plate 2 are provided to the inside of the welding truck 4 and the profiling lever 20 is fitted to a slide base 9 which faces the fillet part. The welding carriage 4 is placed on a horizontal plate 1 via guide rollers 8 and the rollers 5 are attracted to the vertical plate 2 at the time of welding the fillet part 3. The rollers 5 are driven by a motor 6 to travel on the vertical plate 2 surface and the carriage 4 executes profile welding of the fillet weld zone 3. The carriage 4 moves along the vertical plate 3 side and since the guide rollers 8 are small, the welding is executed even if the width of the horizontal plate 1 is small. Since the influence of the distortion of the vertical plate 2 is prevented, the welding accuracy and the welding workability are improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applied to fillet welding of T-joints between horizontal plates and vertical plates of box-shaped structures such as ships, offshore structures, and steel structures. Regarding automatic meat welding equipment.

[Conventional technology]

Conventionally, as an automatic fillet welding device for fillet welding T-joints between the horizontal plate and the vertical plate of a box-shaped structure, many compact devices have been developed, and a representative example is shown in Figure 6. As shown in the top view and the side view in FIG. 4, a welding torch position adjustment mechanism has a traveling motor 23 mounted on a traveling truck 22 equipped with a pair of left and right horizontal plate traveling wheels 21 at the front and rear, and a welding torch 24 suspended therefrom. 25 is placed thereon, and a vertical plate copying roller 26 is provided protruding from the side.

Therefore, when welding, the running wheels 21 are mounted on the horizontal plate 1, the copying roller 26 is brought into contact with the vertical plate 2, and the welding torch 24 is adjusted to an appropriate angle position by the welding torch position adjustment mechanism 25. When welding starts, the traveling truck moves by the traveling wheels 21 while the detection switch detects the tracing of the vertical plate 2 by the tracing roller 26, and the limit switch attached to the traveling truck 22VC detects the welding end point. When this is detected, the traveling carriage 22 stops and bathing ends. However, such a device has the following drawbacks.

(1) In order to place the traveling roller 21 on the horizontal plate 1,
If the width of the horizontal plate 1 is too narrow to allow the traveling roller 21 to ride on it, it cannot be used.

(2) Since the copying roller 26 copies the vertical plate 2,
If the vertical plate 2 is tilted due to distortion due to welding of the vertical plate 2, installation error, etc., there is a risk that a deviation may occur.

[Problem to be solved by the invention]

The present invention was proposed in view of these circumstances, and
It can be applied even when the inside of the horizontal plate is extremely narrow, and even if the vertical plate is tilted due to ttC due to distortion of the vertical plate or installation error, there will be no misalignment, and the simple structure of the device allows smooth and appropriate operation. An object of the present invention is to provide an automatic fillet welding device that can perform fillet welding accurately.

[Means to solve the problem]

To this end, the present invention provides an apparatus for automatically welding a fillet weld formed in a T-joint where a horizontal plate and a vertical plate intersect perpendicularly. a pair of magnetic adsorption type drive rollers that come into contact with the welding cart; a drive motor that is mounted on the welding cart and rotates the driving roller; A pair of small-diameter guide rollers, a copying lever vertically installed vertically from the upper part of the welding cart so as to move forward and backward diagonally toward the fillet weld via a SQUID mechanism, and a copying lever that rotates along the fillet weld at the lower end of the copy lever. The present invention is characterized by comprising a movably supported copying roller and a welding torch holder integrally fixed to the copying lever.

[For production]

In the automatic fillet welding device of the present invention, the small-diameter guide roller at the lower end of the welding cart is mounted on the horizontal plate, and
When the drive roller on the upper part of the welding cart comes into contact with the standing plate and is attracted to it, the weight of the welding cart, welding torch holder, etc. is supported by the drive roller adsorbed to the standing plate, and part of it is supported by the guide roller. .

Place the welding torch in the correct posture and position for the fillet weld! I
When welding is started after alignment, the drive roller runs on the vertical plate surface, the guide roller runs on the horizontal plate, and the welding carriage runs along the welding line of the fillet weld, while the welding carriage is free to squid. A copying lever provided obliquely follows the fillet weld in a movable manner, and a copy roller at the lower end thereof rolls along the fillet weld to always accurately copy the fillet weld.

〔Example〕

One embodiment of the automatic fillet welding apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a front view, and FIG. 2 is a plan view.

In the above figure, a box-shaped aluminum welded truck 4 has a fillet weld 3 formed at a T-joint where the horizontal plate 1 and the vertical plate 2 intersect perpendicularly. A pair of magnetic adsorption type drive rollers 5 that come into contact with the vertical plate 2
A drive motor 6 is placed thereon, and a vertical plate 2WC at the lower end of the welding cart 4 has a gate-shaped leg 7 hanging thereon whose position can be adjusted in the horizontal direction by engagement with a long hole and a bolt. A pair of guide rollers 8 are attached to the front and rear lower ends of the guide rollers 8, which are pivotally supported around a horizontal axis and ride on the horizontal plate 1.

Further, on the opposite side of the welding cart 4 from the vertical plate 2, a SQUID base 9 that faces the fillet welded portion 6 is installed obliquely so as to be able to adjust its angle. It is installed vertically. A copying roller 11 is pivotally supported at the lower end of the copying lever 1° around an axis perpendicular to the longitudinal axis thereof, and a welding torch holder 12 is fixed to the upper end of the copying lever 10. The welding torch holder 12 has a welding torch clamping plate 13. A welding torch tightening knob 14 and a welding torch position adjustment mechanism 15 are attached.

On the top of the welding cart 4, there is a magnetic adsorption type for transportation.
A handle 16 is attached to the drive roller 5 for attaching and detaching it, and auxiliary legs 17 are attached to the lower part to prevent it from falling.
In addition, a limit switch 18 for stopping welding and a limit switch 19 for stopping the welding truck and for emergency welding are protruded from the front end of the welding cart 4.7 In such a device, when welding, hold the handle 16 while welding. The trolley 4 is aligned along the vertical plate 2, and the guide roller 8 at the lower end of its leg 7 is placed on the horizontal plate 1, and the drive roller 5 is brought into contact with the vertical plate 2 and adsorbed. Then welding cart 4. The weight of the welding torch holder 12 and the held welding torch (not shown) is absorbed by the drive roller 5.
A portion of the roller 8 is supported by the guide roller 8 .

Further, the inclination angle of the squid base 9 is adjusted to bring the copying roller 11 at the lower end of the copying lever 10 into contact with the fillet weld part B.

Next, the welding torch position adjustment mechanism 15 is operated to adjust the vertical and horizontal positions of the welding torch on the welding torch holder 12, and the tip is adjusted to an appropriate posture and position relative to the fillet weld 3. Start welding by pressing the push button switch on the control device that is not shown.

The drive motor 6 starts operating at the same time as welding starts.

Then, the drive roller 5 runs on the two vertical plates, the guide roller 8 runs on the horizontal plate 1, and the welding cart 4 runs along the welding line of the fillet weld 3, and automatic welding progresses. do. When the welding end point is reached, the welding operation is stopped automatically by the limit switch 18 or by operating a pushbutton switch on the control device. In order to minimize the amount of welding left at the start and end of welding, the welding torch is positioned at the center of the pair of drive rollers 5. In this way, the device of the present invention has a pair of magnetic adsorption type The drive roller 5 attracts the welding cart 4 to the vertical plate 2 side, and the small-diameter guide roller 8 at the lower end of the leg 7 is mounted on the horizontal plate 1 to serve as a traveling guide, so the dimensional restrictions of the horizontal plate 1 are avoided. Automatic fillet welding can be carried out without any interference even when the width of one horizontal plate is very narrow, for example, 10 mm or less.

In addition, the copying mechanism consisting of the copying lever 10 and the copying roller 11 at the lower end is of a type that directly copies the fillet weld 3, and is fitted to the SQUID pace 9 on the welding cart 4 so as to be able to SQUID freely. Since the copying lever 10 and the welding torch holder 12 are integrally fixed, the copying roller 1
The welding torch positional relationship with respect to 1 is always maintained properly,
Therefore, even if the vertical plate 2 is tilted due to welding distortion or installation error, automatic welding can be performed while accurately tracing the welding line, and welding work efficiency is greatly improved. In the device, if the magnetic adsorption drive roller 5 comes off for some reason, such as a sputter arc strike, the emergency stop limit switch 19 is activated to immediately stop the welding cart 4 and the welding operation. It's safe. Furthermore, in this case, the auxiliary legs 17 prevent the welding cart 4 from falling over.

〔Effect of the invention〕

In short, according to the present invention, in an apparatus for automatically welding a fillet weld formed in a T-joint where a horizontal plate and an upright plate intersect perpendicularly, the upright A pair of magnetic adsorption type drive ports that come into contact with the plate.
a drive motor mounted on the welding cart to rotate the drive roller; a pair of small-diameter guide rollers pivotally supported around a longitudinal horizontal axis near the fillet weld at the lower end of the welding cart; A copying lever is vertically installed vertically from the upper part of the welding cart toward the fillet weld via a SQUID mechanism so that it can freely advance and retreat, and an image layer is pivotally supported at the lower end of the copy lever so that it can roll along the fillet weld. Equipped with a roller and a welding torch holder that is integrally fixed to the above-mentioned copying lever, it can be used even when the inside of the horizontal plate is extremely narrow, and it can also be used when the vertical plate is tilted due to distortion or installation error. The present invention is industrially extremely useful because it provides an automatic fillet welding device that can perform fillet welding smoothly and accurately without causing misalignment even in certain cases, and with a simple structure. It is something.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the automatic fillet welding device of the present invention;
Figure M2 is a plan view of the same as above. Fig. 3 is a front view of a conventional automatic fillet welding device, and Fig. 4 is a side view of the same.
...Welding cart, 5...1 @ moving roller 6... Drive motor 7-legs, 8... Guide roller, 9...
・・Squid base% 10・Imitation Elever 11・
...Copying roller 12...Welding torch holder 13
... Welding torch tightening plate, 14... Welding torch tightening knob, 15... Welding torch position adjustment mechanism, 16... Handle, 17... Auxiliary leg, 18... Limit switch,
19...Limit switch. Agent Masa Tsukamoto, Patent Attorney Figure 1 Figure 2

Claims (1)

[Scope of Claim] In an apparatus for automatically welding a fillet weld formed in a cross joint where a horizontal plate and a vertical plate intersect perpendicularly, the vertical plate is pivotally supported around a front and rear vertical axis in the upper part of a welding cart. a pair of magnetic adsorption type drive rollers that come into contact with the welding cart; a drive motor that is mounted on the welding cart and rotates the driving roller; A pair of small-diameter guide rollers, a copying lever vertically installed vertically from the upper part of the welding cart to the fillet weld via a SQUID mechanism so as to be able to advance and retreat diagonally, and a copying lever that rotates along the fillet weld at the lower end of the copy lever. An automatic fillet welding device comprising a movably supported copying roller and a welding torch holder integrally fixed to the copying lever.