JPS595500Y2 - Automatic welding equipment for thin plate helical joints - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic welding device for thin plate edge joints, and is suitable for use in edge joints of large thin plate structures.

Traditionally, edge joints have often been used when manufacturing large structures using thin plates, and these have been welded by TIG welding or the like.

The first example shows an example of an edge joint for such a large thin plate structure.
As shown in the figure, the edge joints C are not continuous, but are divided into sections of a certain length and are orthogonal to each other, so that they are installed side by side.

In addition, at the ends separated by a certain length, the helical joint slopes, cuts out, and disappears, and the shapes are two types: Type A, where the slope is long and gentle, and disappears, and Type A, where the slope is steep and disappears short. B (see Figure 1c and d).

Conventionally, devices have been proposed that can automatically weld when edge joints with such disappearing parts A and B are continuous, but when edge joints C intersect with a box or mold, the device The welding torch could not be moved to the annihilated part due to interference with the edge joint, and it was not possible to weld the annihilated part of the edge joint.

In addition, the lower end of the hem joint is often in a widened state, and when the welding device is attached to the hem joint, the center of the welding torch and the center of the groove of the hem joint do not align and must be adjusted. , leading to a decrease in work efficiency.

The present invention eliminates such conventional drawbacks and provides an automatic welding device for edge joints that is capable of efficiently welding edge joints that intersect with parallel racks in all positions and with stable quality. The automatic welding device for thin plate hem joints of the present invention has a configuration that achieves the above object, and includes pressure rollers that are pressurized on both sides of the hem joint to be welded and are driven to rotate. In equipment that automatically travels and welds joints, it is pivoted at the bottom of the equipment body,
A pair of support plates are provided whose upper ends are connected by gears that mesh with each other and which open and close at the same angle.A guide roller that rolls on the workpiece to be welded is provided at the lower end of this support plate C, and the pressure roller is provided inside each opening and closing part. The present invention is characterized in that a welding torch is provided on the device main body so as to be slidable in the traveling direction of the device main body, tiltable, and vertically movable on the bisector of the opening/closing angle of the support plate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic welding device for thin plate edge joints according to the present invention will be described in detail below with reference to the drawings.

FIGS. 2 and 3 show an embodiment of the automatic welding device for thin plate edge joints of the present invention, with FIG. 2 being a cross-sectional view and FIG. 3 being a side view.

Arm 12, 12' and side plates 35, 35 that form the main body of the device
A pair of support plates 1 and 2 are rotatably supported on the main body of the apparatus so as to sandwich the welded edge joints 28 and 29, and these support plates 1 and 2 are covered with A pressure roller 3.4 that presses the welded edge joint 28.29 from both sides is attached to a shaft 24.25 rotatably supported by a bearing with a set screw 2.
6. It is supported and fixed at 26'.

Also, by driving this pressure roller 3, the edge joints 28, 29
A traveling drive motor 7 is supported on the side of the support plate 1 as an automatic traveling mechanism II for traveling along the The worm 6 is rotationally driven through a spur gear 31 that meshes with the gear 30, and the worm wheel 5 rotates the spur gears 8 and 8', which rotates the pressure roller 3 fixed to a shaft 25 coaxial with the spur gear 8. drive

The pressure rollers 3 of this support plate 1 are provided in two, front and rear, and are periodically driven by transmitting the power of a drive motor 7 via a worm 6 and a worm wheel 5.

Further, the pressure rollers 3 and 4 are made of rubber or the like having a large coefficient of friction on their surfaces so that they can be driven reliably.

Further, the support plate 1 includes a limit switch 9 for stopping runaway and a stop plate 33. Dock bars 10 are provided and these are covered with a cover 32.

Further, a pressure clamping spring 20 is provided on the support plate 2 facing this, and a case 21 of this pressure clamping spring 20 receives a spring force at one end, and the other end receives a spring force from the side of the support plate 2. A pressurizing force adjusting screw 19 is provided so as to protrude from the top, so that the spring force can be adjusted.

Further, heat insulating plates 18 and 18' are attached to both sides of the support plates 1 and 2 near the welded portions of the edge joints 28 and 29 to block heat during welding.

Further, a guide roller 11.1 is provided at the lower end of the support plates 1 and 2.
1' is attached to guide the device along the bottom surface of the part to be welded.

Guide roller 11.11' at the lower end of this support plate 1゜2
The vehicle is equipped with a front wheel and a rear wheel, and by attaching the front wheel a little above and tilting the entire device forward, the device can be prevented from lifting up during driving, and stable driving can be achieved.

Furthermore, the support plates 1 and 2 are connected by spur gears 16 and 16' pivotally supported at their upper ends so that they mesh with each other and can move symmetrically through the same angle.

A tension spring 17 is interposed so that both support poles 1,
2 is biased to open.

This spur gear 16, 16' is attached to a pin 34, 34' on the side plates 35, 35' which are connected in a box shape by the two side plates 35, 35' and the arm 12, 12' that constitute the device main body (2) mentioned above.
I support it.

Further, as a moving mechanism III for the welding torch 27, a rail 14.14' is provided on the upper part of this box shape in the traveling direction of the apparatus main body I, and a slide plate 36 can be slid along the rail 14.14', and this apparatus Even if it is in contact with the edge joints 41 and 42 that are perpendicular to the edge joints 28 and 29,
Slide the slide plate 36 along the rail 14.14', and set it on the slide plate 36 so as to be on the bisector of the opening/closing angle of the support plates 1 and 2, that is, to coincide with the opening line of the edge joint 28.29. The welding torch 27 can be moved to the disappearing part of the edge joint.

Further, on the slide plate 36, there is a left/right/up/down adjustment slide 15 that allows the welding torch 27, which remains aligned with the opening lines of the edge joints 28, 29, to be tilted back and forth with respect to the running direction of the device, and slidable up and down. are provided, and the left and right
By tilting the welding torch 27 attached to the vertical adjustment slide 15 as shown in FIG.
This is so that it can be moved.

In order to fix the movable welding torch 27 in this manner, a lock bolt 23 is provided on the left/right/vertical adjustment slide 15, and is fixed by being clamped between it and a fixing member.

Furthermore, a handle 13 is provided on the arm 12 side. Arm 12'
A clamper 22 of a clamping toggle mechanism IV is attached to the side, and this clamping toggle mechanism IV applies pressure to the edge joints 28 and 29 to clamp the device main body I.

This toggle mechanism IV consists of four links and three arms, and is provided with an arm 39 that connects a lever 37 and a stopper 38, and a stopper 40 that protrudes from the side surface of this arm 39. (see Figure 4a).

In the clamper 22 of this clamp toggle mechanism IV, when the lever 37 is in the state shown in FIG. Then, the lever 37 and the stopper rod 38 are on the same line, and by further rotation, the stopper 40 of the arm 39 comes into contact with the stopper rod 38, and when the lever 37 is further rotated, the stopper rod 38 is further rotated and the stopper 40 is brought into contact with the stopper rod 38. The tip of the rod 38 presses the pressure adjustment screw 19 at the tip of the pressure clamp case 21 to compress the pressure clamp spring 20, and the support plates 1, 2
are moved the same distance from each other by spur gears 16° and 16', and the helical joints 28 and 29 are held between pressure rollers 3 and 4 (see Figure 4).

Welding work using the automatic edge joint welding device of the present invention configured as described above is performed by first lifting the handle 13 and the lever 37 of the clamper 22 of the clamping toggle mechanism IV, as shown in Fig. 4 a, l). .

At this time, the support plates 1 and 2 are connected to the tension spring 17 and the spur gear 1.
6.16' action makes pins with the same angle symmetrical on both sides 34.34
' is open in the center.

At this time, the side plates 35, 35' and the arms 12, 12'
The welding torch 27 provided on the box-like structure is always located on the bisector of the opening/closing angle of the support plates 1 and 2.

Next, the guide rollers 11.11' are connected to the heli joints 28, 29.
After hitting the bottom surface of the clamp, rotate the lever 37 of the clamper 22 of the clamp toggle mechanism IV, press the pressure adjustment screw 19 with the stopper rod 38, and press the support plates 1 and 2 which are engaged with the spur gears 16 and 16'. The welded edge joints 28 and 29 are held between the pressure rollers 3 and 4 by moving them at the same angle.

This state is shown in Figure 4. At this time as well, the welding torch 27 is positioned on the bisector of the opening/closing angle of the support plates 1 and 2, that is, on the groove line of the hem joints 28 and 29 to be welded.

Thereafter, the switch of the drive motor 7 is turned on, welding conditions are selected, and the welding machine automatically runs to weld the straight portion.

At the end of the edge joint 28.29 to be welded, the device is moved to a range where it does not touch the orthogonal edge joint 41.42, and then the welding torch 27 is moved along the rail 14.14' on the device. Figure 5a
.

As shown in b, welding can be performed by moving the welding torch 27 and further using the horizontal and vertical adjustment slides 15 according to the shape of the disappearing part.

Even if the welding torch 27 is moved along the shape of this disappearing part, the welding torch 27 is always on the groove line of the edge joint 28, 29, and adjustment work is required to align the opening line with the center of the welding torch 27. is not required.

As described above in detail with the embodiments, according to the present invention, even when the edge joints of a thin plate structure are arranged in a circular shape, each edge joint can be automatically welded without being hindered by other edge joints. In addition, even if the edge joint disappears, it can be easily welded by moving the welding torch using the slide plate and the left/right/up/down adjustment mechanism.

In addition, since the device is held between the edge joints by pressure rollers, it can be installed not only horizontally but also vertically, making it possible to weld in all positions.

Furthermore, when attached to a helical joint, the welding torch is always located at the center of the groove of the helical joint, and there is no need for any adjustment.

Additionally, since the welding torch is aligned with the groove, welding quality is improved and automation contributes to cost reduction.

Furthermore, the device is small and lightweight and can be attached and detached with a single touch, reducing operator fatigue.

[Brief explanation of the drawing]

Figures 1 a to d are explanatory diagrams of edge joints for large thin plate structures.
, l) are external perspective views, c and d are front views of the shape of the disappearing part of the edge joint, and Figures 2 and 3 are cross sections of the automatic welding device for thin plate edge joints of the present invention. 3 is a side view, FIGS. 4a and 4b are explanatory diagrams of the procedure for attaching the automatic welding device for thin plate edge joints of the present invention to edge joints, and FIGS. 5a,
b is an explanatory view showing the state of the welding torch at the disappearing part of the edge joint. In the drawings, ■ is the main body of the device, II is the automatic traveling mechanism, III is the welding torch moving mechanism, IV is the clamp toggle mechanism,
A and B are the disappearing part of the edge joint, C is the straight part of the edge joint, 1
, 2 is a support plate, 3 and 4 are pressure rollers, 7 is a drive motor, 11.11' is a guide roller, 12.12' is an arm, 14.14' is a rail, 15 is a left/right/vertical adjustment slide, 16゜16' is a spur gear, 17 is a tension spring, 19 is a pressure adjustment screw, 22 is a clamper, 23 is a lock bolt, 27 is a welding torch, 28, 29, 41.42 is an edge joint, 35.35' is the side plate.

Claims (1)

[Scope of utility model registration request] In an apparatus for automatically traveling and welding the helical joint to be welded, the apparatus includes pressure rollers that are pressurized on both sides of the helical joint to be welded and are rotationally driven, gears that are pivotally supported at the lower part of the apparatus main body and mesh with each other. A pair of support plates are provided whose upper ends are connected and open and close at the same angle, and a guide roller that rolls on the welded member is provided at the lower end of the support plate, and the pressure roller is provided on the inner side of each of the support plates. An automatic welding device for thin plate edge joints, characterized in that the device main body is provided with a welding torch that is slidable in the traveling direction of the device main body on the bisector of the opening/closing angle of the support plate, can be tilted, and can be moved up and down. .