JPS5932458Y2 - Automatic lap welding equipment - Google Patents

Description

[Detailed description of the invention] The present invention automatically creates a lap joint in which the materials to be welded, that is, the horizontal horizontal weld joint and the downward weld joint, are approximately the same distance X from the corner as shown in Figure 1. Related to welding equipment.

Currently, joints such as those described above are used in LNG underground tanks and the like, and are manually welded by highly skilled welders.

Therefore, the welding work efficiency is not improved much and the cost is high.

Moreover, there is a problem in that it becomes difficult to even ensure quality if unskilled workers are involved.In particular, if the distance .

Furthermore, even if a conventional automatic lap joint welding device is installed to perform welding, the installation position must be changed in order to change the direction of the torch from downward to sideways, which is cumbersome and difficult.

The present invention provides an automatic lap welding device that can freely switch the welding torch from downward welding to horizontal horizontal welding, or from horizontal horizontal welding to downward welding, while the traveling truck remains installed. The purpose is to reduce man-hours, improve quality, and reduce costs by making it possible to automate the welding of A torch head equipped with a trolley and a welding torch that are movably adjustable and installed near one of the lap joints of a material to be welded having first and second lap joints at the same distance so as to run along the welding line; The torch head supporting member that connects these is connected by swinging the torch head between the first lap joint part and the second lap joint part about the pin in a first pin parallel to the welding line. The welding torch is pivoted in such a manner that the welding torch is rotated by 180° using a second pin located on a plane perpendicular to the welding line, and the direction of the welding torch is reversed on the welding line. The structure of the present invention, which is characterized by the following, will be explained in detail based on a specific example shown in the drawings.

The material to be welded in this specific example is an L-shaped lower material to be welded 1a.
The upper welded material 1b of the thin plate is superimposed on the lower welded material 1a at a substantially equal distance X from the corner (crossing line) 2 and parallel to the crossing line 2, and the first lap joint part 3 and the second lap joint part Section 4 is constructed.

In other words, it is a structure in which the downward weld joint and the lateral horizontal weld joint are approximately equidistant from the corner 2.

The trolley 5 is supported and guided by a running rail 6/li and a pair of legs 7 attached to both ends of the rail so that it can stand upright.

Hook-shaped positioning members 8, which are hooked onto the edges of the upper workpiece 1b, are screwed to the legs 7, respectively.

Therefore, the positioning members 8 at both ends are
By hooking it to the edge of the welding line, the cart 5 can be run along the welding line at a certain distance from the edge.

The carriage 5 is engaged with a feed screw 9 provided at the center of the running rail 6, and is moved by the action of a drive motor 24 provided at one end of the running rail 6, which rotates forward and backward.

Further, the support plate 10 is mounted on the cart 5 and has a vertical slide 1.
1 so that it can move up and down.

This support plate 10 is attached so as to protrude from the cart 5 toward the weld line so as to be located on a plane perpendicular to the weld line, and is connected to a first pin 12 parallel to the weld line and centered around this first pin 12. One member (hereinafter referred to as the first member) 14a of the torch head support member 14 consisting of two members is swingably supported by the arc-shaped guide groove 13 so that it can be fixed at any position.

The first member 14a of the torch head support member 14 is fixed by:
This is achieved by a fixing jig consisting of a bolt-shaped retaining pin 15 that is fitted into the guide groove 13 so as not to rotate, and a lever 16 that is screwed onto the retaining pin 15.

That is, by turning the lever 16, the retaining pin 15 is drawn and the support plate 10 is clamped and tightened.

Further, the range of swinging is performed at 90' between the first lap joint part 3 and the second lap joint part 4 with the first pin 12 as an axis.

Also, a second pin 17 located on a plane perpendicular to the welding line
The torch head 18 is attached to the other member (hereinafter referred to as the second member) 14b of the torch head support member 14, which is attached to the first member 14a described above so as to rotate by 180 degrees around the pin 17. I'm getting lost.

Therefore, the torch head support member 14, the second member 1
The torch head 18 attached to 4b rotates 180 degrees around the second pin 17 to reverse the direction of the torch 19 on the welding line, while the first member 14a is rotated 90 degrees around the entire axis of the first pin 12. ' Rotate from the first lap joint part 3 to the second joint part 3.
It can be switched to the lap joint 4 or in the opposite direction.

The relationship between the first pin 12, the second pin 17, and the torch head support member 14 is not limited to the above-described configuration.

The second pin 17 may connect the torch head support member 14 and the truck 5, and the first pin 12 may connect the torch head support member 14 and the torch head 18, respectively.

In short, the trolley 5, the torch head 18, and the torch head support member 14 that connects them are connected to the torch head 1 with the first pin 12 parallel to the welding machine, with the pin 12 as an axis.
The second pin 17 is positioned on a plane perpendicular to the welding line, and the pin 17 is used as an axis. The torch head 18 may be rotated 1800 times to reverse the direction of the welding torch 19 on the welding line, and the two may be connected.

The torch head 18, which is provided so that the welding torch 19 can be moved toward and away from the workpiece, includes a cross-feeding slide 20 that supports the welding torch 19 and gives cross-feeding to the welding torch 19, and the cross-feeding slide 20. It is comprised of a fine adjustment slide 21 for vertically feeding the fine adjustment slide 21 that moves the fine adjustment slide 21 vertically little by little, and a coarse adjustment slide 22 that roughly moves the fine adjustment slide 21 vertically.

The welding torch 19 is inverted and rotated around the first pin 12 and the second pin 17, respectively, to form the second lap joint portion 4.
The torches are tilted at 45° with respect to the welded materials 1a and 1b so as to obtain the same torch angle when facing each other.

Further, a pressure roller 23 is attached to the torch head 18 for pressing the upper workpiece 1b to the lower workpiece 1aK.

Once the pressure roller 23 is installed, a compression spring (not shown) is interposed between the pressure roller 23 and the coarse adjustment slide 22 so that the pressure force can be adjusted. It is provided to transmit the rolling blade to.

With this structure, downward welding and lateral horizontal welding can be performed successively by performing the following operations.

First, the positioning member 8 of the leg 7 of the traveling rail 6 is hooked onto the edge of the upper workpiece 1b on the side of the downward welding portion, that is, the first lap joint portion 3, and the traveling rail is parallel to the weld line of the fourth lap joint portion 3. 6, adjust the vertical slide 11 so that the first pin 12 is located approximately at a distance X from the first and second lap joints 3 and 4, and then adjust the coarse adjustment slide 22. While operating the pressure roller 23 to press it against the upper workpiece 1b with an appropriate pressure force, the fine adjustment slide 21
and the transverse slide 20 to position the welding torch 19 at an appropriate position (see FIGS. 2 and 3).

In this state, blow the arc and start downward welding.

When the trolley 5 moves to the end of the traveling rail 6 by the action of the drive motor 24 and downward welding is completed, the arc is once cut and welding is interrupted.

Then, the tightening screw 25 of the second pin 17 is loosened, the entire torch head 18 is rotated 180 degrees around the second pin 17, the direction of the welding torch 19 is reversed on the welding line, and the welding torch 19 is fixed again.

Next, the lever 16 of the torch head support member 14 is loosened, and the entire torch head 18 is rotated 90 degrees around the first pin 12.
° Tilt the welding torch 19 horizontally, and move the welding torch 19 to the second lap joint 4.
turn to

Since the welding torch 19 is inverted 180 degrees and then tilted 90 degrees, the welding torch 19 moves symmetrically with the bisector 26 of this angle passing through the second pin 17 and the intersection line 2 as an axis of symmetry, and the surface of the lower workpiece 1a is and the edge of the upper workpiece 1b (see FIG. 4).

Even though it is called lateral horizontal welding, if you look only at the groove part, strictly speaking, it can be said to be upward welding.

In this state, the arc is blown again and the drive motor 24 is reversed to perform lateral horizontal welding in the opposite direction to the downward welding.

When switching from this lateral horizontal welding to downward welding, the above-mentioned operation may be reversed.

In this way, according to the automatic welding device of the present invention, the torch head 18 can be rotated by 90 degrees around the first pin 12 to tilt it, and the torch head 18 can be rotated by 180 degrees around the second pin 17 to change the orientation of the welding torch 19. By reversing the two movements, it is possible to easily and accurately switch from downward welding to horizontal horizontal welding, or from horizontal horizontal welding to downward welding. Lap welding of materials to be welded, as shown in FIG. 1, in which the edges are approximately equidistant from the corners, can be performed in one time using the apparatus, and the number of welding steps can be shortened by shortening the preparation time.

Moreover, by automating welding, high-quality welded joints can be obtained at low cost without requiring skilled workers.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a material to be welded, FIG. 2 is a front perspective view of the automatic lap welding apparatus of the present invention, and FIG. 3 is a right side view of the apparatus during downward welding. FIG. 4 is a right side view of the same, showing the state during lateral and horizontal welding. In the drawing, 1a is the lower welded material, 1b is the upper welded material, 2
3 is the first lap joint, 4 is the second lap joint, 5 is the trolley, 10 is the support plate, 11 is the vertical slide, 12 is the 1st pin, 13 is the guide groove, and 14 is the torch. Head support member, 17 is a second pin, 18 is a torch head, 19
2 is a welding torch, and 23 is a pressure roller.

Claims (1)

[Scope of utility model registration request] The first and second lap joints intersect with each other, are parallel to the intersection line, and are located at approximately the same distance from the intersection line. A first pin parallel to the welding line is used to connect the torch head, which is equipped with a movable adjustable welding torch, and a torch head support member that connects these parts. The first lap joint part and the second lap joint part are pivoted so as to swing between the second lap joint part and the second lap joint part.
An automatic lap welding device characterized in that the torch head is rotated a full 180° about a pin to reverse the direction of the welding torch on the welding line.