JPS5841032Y2 - Is there a way to get rid of it? - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic welding device that eliminates welding residue when welding a welding line that has obstacles such as partitions and walls before and after the welding line.

Conventionally, when there is an obstacle to the welding line, for example, a joint part such as a side longitudinal web in shipbuilding or a cross tie (strut) web, the obstruction inevitably causes some welding residue.

This part had to be manually welded later, but in recent years there has been a gradual shift toward automation.

The first thing to consider when automating the welding process is to change the angle of the welding torch so that the apparatus body does not collide with the obstacles.

This type of automatic welding equipment is a device that rotates the torch to weld lines with different curvatures and always keeps the welding angle constant;
When welding a rectangular object, there are some methods that turn the torch around 90' at some corners, but these methods are not designed to eliminate welding residue.

The present invention has been developed to have a simple structure and to eliminate the possibility of welding remaining due to obstacles.

That is, this automatic welding device is equipped with a welding torch configured to be rotatable in the direction of the welding line around the arc point on a self-propelled welding truck, and is activated when the truck starts traveling during welding. , and a timer for instructing to start rotating the torch and a limit switch for instructing to stop rotating the torch are provided so that the torch can be rotated while the trolley is running. be.

In the device of the present invention, first, the height position of the arc point does not change due to the rotational movement of the torch, so the wire protrusion length and
The arc length does not change, and the welding speed remains constant when viewed from the welding line.

In addition, there is no need for a complicated control circuit for the continuation of the running motion and rotational motion when they are linked, reducing the electrical load and preventing changes in the welding mechanism during automatic continuous welding. .

The present invention will be explained in detail by way of examples.

FIG. 1 shows a principle diagram of the rotating device of the present invention, and shows the side longitudinals of the hull.

In such a side longitudinal, either part near the wall cannot be welded with a fixed torch.

I and I' are obstacles when welding web ■.

As shown in the figure, the welding torch ■ is installed aiming at the corner and rotates in the direction of the arrow around the arc point.

At this time, the traveling starts at the same time as welding starts, and at any arbitrary place on the way from the wall surface I to the other wall surface I'r, rotation is performed superimposed on the traveling, and the wall surface I' and the web Rotate the welding torch ■ so that it can be used for welding all the way to the corners.

At this time, the running speed may be constant over the entire length, and no electrical operations (speed control, etc.) upon rotation are required except for the start and end of rotation.

FIG. 2 and FIG. 3 are a front view and a side view for explaining an example of the embodiment.

Reference numeral 1 denotes a traveling rail, which is fixed to the welded material 13 by clamp mechanisms 12-1, 12-2.

(Note that it is equipped with a slide mechanism that allows the clamp position to be adjusted depending on the length of the material to be welded.

) 3 is a running bogie, which has a running pinion gear 4 connected to a built-in drive motor and a running guide roller 5, which mesh with the rack gear 2 and guide groove 1' of the running rail 1 to guide the running vehicle. do.

6 is a circular rail for rotating the torch having a rack gear 6' and a guide groove 6'', and is fixed to the traveling carriage 3.

The center of curvature of this circular rail is located at A near the arc point.

Reference numeral 7 denotes a torch rotation mechanism, which has a rotation pinion gear 8 connected to a built-in rotation drive motor and rotation guide rollers 9-1, 9-2, and a circular rack gear 6' of the rotation circular rail 6. It is guided by the guide groove 6'' and rotates around point A, that is, the arc point.

Reference numeral 10 denotes a jig that connects the rotating device 7 and the welding torch 11 at a torch mounting portion.

The case of welding a web of side longitudinal material as shown in this figure will be explained based on the flowchart of FIG. 4.

First, at the start of welding, the welding torch 11 is tilted forward (for example,
The angle with the vertical line is set to 10' to 20°, and welding is started.

At this time, a timer that commands the rotation of the torch is also activated.

The welding cart 3 starts running at the same time as welding starts.

After that, as explained in the principle diagram of Fig. 1, at any point along this welding line, the welding torch 11 is tilted backward from the forward tilt at the start (for example, by changing the angle with the vertical line), centering on the arc point. lO
8 to 20 degrees).

To complete the rotation, a striker (shown in the figure) is provided on the rotating portion, and the striker contacts and detects the limit switch 14 set on the circular rail, thereby completing the rotation.

Further, the traveling and welding of the welding cart 3 is stopped by detecting a limit switch 15 set in advance for the rail 1t.

The rotation speed may be at least as long as the rotation is completed until the travel is completed.

According to the present invention, when there is an obstacle on the welding line, the welding method is changed during welding by making it possible to weld the part that cannot be welded due to the obstacle, and stopping the movement and rotating the welding line. A stable welded part can be obtained without any problems.

The mechanical device is simple and the control mechanism is simple.

Also, the stability of the welded part is guaranteed.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the principle operation of the present invention, Figs. 2 and 3 are front and side views showing an embodiment of the invention, and Fig. 4 is a flowchart showing the actual welding operation of the invention. be. 1. I'... Obstacle (wall), ■...
Web, ■... Welding torch, 1... Running rail, 3... Running trolley, 6... Rotating circular rail, 6'...・Circular rack, 7...
... Torch rotation mechanism, 8 ... Rotating pinion gear, 11 ... Welding torch, 13 ... Open welding material, A ... Torch rotation center point .

Claims (1)

[Scope of utility model registration request] In a welding device in which a welding torch configured to be freely rotatable in the welding line direction around an arc point is mounted on a self-propelled welding truck, the welding device is activated when the truck starts traveling during welding,
The automatic welding device is further equipped with a timer for instructing the torch to start rotating, and a limit switch for instructing the torch to stop rotating, so that the torch can be rotated while the trolley is running. .