JPS5814057Y2 - automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic welding device for simultaneously welding a reinforcing plate between two pipes.

In steel pipe assembly structures such as cranes, reinforcing material may be welded between two pipes for reinforcement.

When welding a reinforcing plate between pipes, simultaneously weld the left and right weld lines where the reinforcing plate and the pipe join as shown in Fig. This type of welding method is now being used in many places because it has the advantage of improving productivity. Reinforcing plate a can be welded by imitating the pipe and fixing two welds I and - to one traveling truck, but if pipes b' and b' are not parallel as shown in Figure 2, reinforcing plate a' When welding, if the welding torches provided on the left and right sides are fixed to one traveling truck, the truck cannot be moved along the welding line.

Moreover, if welding 1.--ch is made to operate following the welding line, the mechanism will be complicated and the manufacturing cost will be relatively high.

The present invention does not rely on a single traveling trolley as in the past, but instead divides the traveling trolley into left and right parts and connects them with a connecting rod with joints.
The running carts on the left and right sides are always urged inward by a spring member and run along the pipe while being supported by a running roller and a copying roller. The spacing can be changed freely so that the welding torch can move along the welding line.

Next, one embodiment of the present invention will be described in detail with reference to FIG. 4 and the subsequent drawings.

Reference numeral 1.1' denotes two pipes that are welded together at the reinforcing plate 2, and are shown in a temporarily welded state.

3A and 3B are a pair of left and right carts that run on the pipes 1 and 1', respectively, and are equipped with a welding machine and connected to connecting rods 4-1.4.
-2 is connected.

The connecting rods 4-1 and 4-2 have rods 4-1A and 4-1B connected at their central portions by a pin joint 22.
and 4-2A and 4-2B, respectively, passing through the traveling carts 3A and 3B, and around the ends of the rods protruding outward, respectively.
B, 5-2 B is mounted by being sandwiched between the side plate on the outside of the bogie and the end plate fixed to the tip of the protruding rod, and by these fittings, the traveling bogies 3A and 3B are always urged toward the center. 'are doing.

Reference numeral 23 is a vertical pin inserted into the bin joint 22.

Further, the traveling carts 3A and 3B are respectively provided with two rollers that move over the pipes 1 and 1' one behind the other.

That is, the front and rear running rollers 9 provided on the running trolley 3A side
, 9' are connected by a chain, and one running roller 9'
The shaft is connected to a drive motor 10 mounted on a traveling carriage, and 9 and 9' are so-called drive rollers.

On the side of the traveling carriage 3B, rollers 11 and 11' are provided so as to move back and forth and are supported by a roller shaft, so-called driven rollers.

6. 6' and 7, 7' are copying rollers provided before and after the pipes 1, 1' that roll in contact with the outer surfaces thereof, and these copying rollers 6, 6' and 7, 7' are attached to the bogies 3A, 3B. (7)I
y4r, a slide 8' mounted so as to be movable in the -L downward direction along the groove of the guide member 8 mounted perpendicularly to the side surface;
are attached to each.

The slide 8' is screwed onto a vertical screw shaft 8a provided on the guide member 8, and is moved up and down by rotating the vertical screw shaft 8a.

Further, the slide 8' is provided with a piece that slides in the horizontal direction, a copying roller is attached to this piece, and a horizontal screw hole is provided in the piece, and a horizontal screw shaft is inserted into the screw hole. 8b
is screwed in and the piece is moved horizontally by rotating the horizontal screw shaft 8b.

The copying rollers 6, 6' and 7, 7' can be moved vertically and horizontally via slides 8' by means of the vertical and horizontal shearing shafts.

Of the copying rollers, 6' and 7' are free copying rollers that are biased toward the pipe by ribs 24A and 24B built into the slide to which they are attached.

On the other hand, roller 6.7 is a fixed type copying roller without the above-mentioned spring.

13 and 14 are welding wires and control boxes mounted on the respective traveling vehicles 3A and 3B, 15 is a welding torch, and the welding parts are fixed plates 17 fixed to the front end surfaces of the traveling vehicles 3A and 3B. A holding member 16.16 provided with a threaded hole is welded at intervals in the lateral direction, and a torch fixing ring is fixed by tightening a threaded rod screwed into the threaded hole of the holding member 16.16. It is attached to 21.

18 is a magnetic sensor for detecting the presence or absence of a reinforcing plate provided close to welding 1--ch; 19 is a magnetic sensor fixing plate; 20
A motor for moving the welding torch moves the torch to the welding position obtained by the sensor 18.

Note that the welding torch 15 attached to each traveling carriage 3A, 3B is arranged near the fixed copying roller 6.7.

- [To explain its function in the above configuration, a traveling trolley 3A connected by connecting rods 4-1 and 4-2 on the temporarily welded pipes 1 and 1' and the reinforcing plate 2 to be welded, 3
Place B.

Then, adjust the device as follows so that it is in the correct position.

First, the screw shaft 8a is operated and moved up and down to position the left and right copying rollers 6, 6' and 7, 7' so that they are located directly beside the open side of the pipes 1, 1'.

Next, the screw shaft 8b of each slide 8' is adjusted so that the driving rollers 9, 9' and the driven rollers 11, 11' are aligned on the longitudinal center line of the respective pipes 1, 1'.

Traveling of the traveling carts 3A, 3B is achieved by rotating the drive rollers 9, 9' by the operation of the drive motor 10, and by causing the driven rollers 11, 11' to follow the rotation.

And the difference in the spacing between the pipes is the connecting rod 4-1.4-2
Biasing springs 5-I A, 5-2 A and 5-
1B and 5-2B, the distance between the traveling trolleys 3A and 3B can be widened or narrowed, and an appropriate position can be taken.
Therefore, welds 1--1 are transferred following the weld line.

Furthermore, regarding the tracing of the welding torch at the bent portions of the pipes 1 and 1', referring to the pipe 1' side in Shikoku in Figure 7, the tracing roller 7 near the welding torch 15 is of a fixed type, Since the copying roller 7' is biased by the spring 24B, the roller 7' is pressed against the outer surface of the pipe from the position indicated by the two-dot chain line a to the position indicated by the solid line. Therefore, the welding torch 15 is installed near the fixed copying roller 7. It is transferred along the weld line without coming off the weld line.

In addition, since the carts are connected by connecting rods with joints, the opening degree can be adjusted freely depending on the spacing between the pipes, and the carts can move smoothly.

As described above, the present invention provides an automatic welding device that simultaneously welds the welding lines along both sides of the reinforcing plate when welding the reinforcing plate between two pipes. Running rollers are installed in front and back to roll on the pipes, and a welding torch is attached to the front side of the running bogie on the left and right sides. A spring that biases the traveling vehicle inward is provided around each of the outwardly projecting ends of the connecting rod that penetrates and connects the traveling vehicle on the left and right sides in the direction; A pair of front and rear copying rollers that roll in contact with the outer surfaces of the parallel pipes are guided by vertical guide members that are attached to the outer surfaces of the left and right traveling carts at a distance from each other. It is attached to a slide that can be moved downwardly and horizontally by the feed means, and the copying roller located at the rear with respect to the traveling direction of the trolley is biased toward the pipe by a spring. The interval between carts can be automatically adjusted to follow the pipe interval, and the welds 1 to 1 attached to each cart can be moved along the weld line, and two weld lines can be automatically adjusted at the same time even if the pipe spacing is different. One person can handle several machines, increasing productivity and producing beautiful welds.

Furthermore, the structure is simple and the operation is easy.

[Brief explanation of the drawing]

Figures 1 to 3 are shown for the purpose of explaining the present invention.
The figure is a plan view of welding a reinforcing plate between two parallel pipes, Figure 2 is a plan view of welding a reinforcing plate between two pipes that are not parallel, and Figure 3 is a plan view of welding a reinforcing plate between two pipes. 4 to 8 show an embodiment of the automatic welding device according to the present invention, FIG. 4 is a perspective view, and FIG. 5 is a longitudinal sectional view taken along line I-I in FIG. 6 is a perspective view of the vicinity of the welding torch attachment, FIG. 7 is an explanatory diagram of the operation of the copying roller at the bent portion of the pipe, and FIG. 8 is a schematic plan view showing the main parts of the present invention. 1.1': Pipe, 2: Reinforcement plate, 3A, 3B: Traveling trolley, 4-1, 4-2: Connection rod, 5-I A, 5-2 A
: Spring, 5-1B, 5-2B: Spring, 6, 6': Copying roller, 7.7': Copying roller, 8a: Vertical screw shaft (screw feeding means), 8b: Horizontal screw shaft (screw feeding means) ,9.
9': Travel roller, 10: Motor, 11.11':
Running roller, 15: Welding 1 hech, 22: Pin joint (joint part), 24 A, 24 B: Spring.

Claims (1)

[Scope of utility model registration request] In an automatic welding device that simultaneously welds the weld lines along both sides of the reinforcing plate when welding a reinforcing plate between two pipes, the reinforcing plate is located on each of the two temporarily welded pipes, and the reinforcing plate is placed on the pipe. Installing rolling rollers in front and behind each other,
The left and right running carts each having a welding torch attached to the front side in the direction of travel are connected through a joint through a connecting rod that passes through the inside of the cart in the lateral direction, and the above-mentioned running carts that pass through the left and right running carts are connected. A lever h for urging the traveling carriage inward is provided around each of the ends of the connecting rod protruding outward, and a pair of front and rear rods that roll in contact with the outer surfaces of the parallel pipes are provided. The rollers are guided by vertical guide members attached to the outer surfaces of the left and right running carts front and back at intervals, and are attached to slides that can be moved vertically and horizontally by means of a feeder. . An automatic welding device, wherein the copying roller is biased toward the pipe by a spring located at the rear with respect to the traveling direction of the trolley.