KR20130033684A - The circumference welding machine - Google Patents

Abstract

PURPOSE: A circumferential welding machine is provided to enhance working efficiency by facilitating to weld bonding wires by a multi-shaft control system. CONSTITUTION: A circumferential welding machine comprises a servo motor(13), an operating unit(15), and a cylinder(20). When the servo motor is rotated by a cylinder, shadows of bonding wires are formed in the outer periphery of a body by lighting. The shadows are photographed by a camera so that images of the shadows are transmitted to the operating unit. A roller, a welding rod supplying device, and a torch are moved to left and right sides along the photographed bonding wires when the cylinder is rotated. Simultaneously, the roller is vertically moved along the outer periphery of the cylinder, and the bonding wires of the body and a cap are welded with a welding bead of constant thickness.

Description

Circumference welding machine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welder, and more particularly to a circumferential welder for joining a cylindrical body and a cap having a hollow shape with a rounded center in a part having a cylindrical shape.

Parts, such as hot tubs with a cylindrical shape, usually consist of a body and a cap that blocks both sides. The body is bent to face both ends of the metal plate, and then welded to the entire joint by skilled workers in a state in which the joint is welded to a predetermined position of the joint by a skilled worker, but the cross-sectional shape is round in consideration of the cylindrical shape. Careful welding is done so as to be. However, as a variable such as deformation of the metal body due to the flame of the torch occurs in the welding process, it is very difficult to weld the metal cylinder to a circle.

In addition, in the case of a hot water tank, the outer periphery of the cap is also not formed in a round shape in the process of forming the cap, considering that a cap having a hollow shape on both sides is joined to a body welded in a cylindrical shape. It is a reality. That is, the cap is made of a shape in which the inside of the metal flat plate is placed on the workbench in the same way as the press from the top, and as the metal flat plate is convexly deformed into a three-dimensional shape, the outer periphery of the cap is round. It is very difficult to be molded into.

The cylindrical body and the cap having the hollow shape as described above, even if manufactured in the same size, due to the difficulty of making a round shape during the molding process, an error occurs in the state in which the body and the cap faced together, overcoming this error Since the joining operation is to be carried out by a few skilled workers, the working efficiency is deteriorated, which is a problem in the mass production.

The present invention was devised to solve the above problems, and provides a cylindrical welder capable of automatically joining a body having a cylindrical shape that is difficult to be formed into a round shape, and a cap having a hollow shape that is joined to both sides of the body. I would like to.

In other words, the body and the cap in the non-circular state are mounted on the jig which can be rotated in the state of being in contact with each other. Then, the joint of the body and the cap is recognized through the lighting and the camera, and the torch and the welding rod along the line of the recognized joint. Automatically weld the joint using, the torch and the electrode to provide a circumferential welder that is operated in conjunction with the roller moving up and down along the outer circumferential surface of the body in a non-circular state.

Specific configuration of the circumferential welder according to the present invention, the cylinder 21 in a state in which the body 21 and the cap 22 are welded is fixed through the pedestal 12 and the jig 11, and the body 21 and Directly above the joint line 23 to which the cap 22 is welded is installed so that the camera 32 and the illumination 30 move vertically and linearly by the operation of the cylinder 14, and the cylinder 20 by the servomotor 13. When () is rotated, a shadow 34 of the seam line 23 is generated on the outer circumferential surface of the body 21 by the illumination 30, which is captured by the camera 32 to the operation unit 15. When the shooting of the shadow 34 is completed, the camera 32 and the illumination 30 are raised upwards according to the signal of the operation unit 15, and at the same time, the roller 40 and the roller 40 are directly above the joint line 23. The welding rod feeder 43 and the torch 45 are installed to move up and down linearly by the operation of the cylinder 14, and when the cylinder 20 is rotated, along the copper line of the joint line 23 photographed above, the servo motor ( 13, the roller 40, the welding rod feeder 43 and the torch 45 are moved to the left and right, and at the same time is mounted on the upper portion of the roller 40, along the outer circumferential surface of the cylinder 20, not the round By the elastic action of the spring 42 is moved so that the roller 40 moves up and down, the welding line 23 of the body 21 and the cap 22 is welded with a welding bead of a constant thickness.

When the circumferential welder according to the present invention is used, although the body and the cap of the cylinder are not round, the welding of the seam through the multi-axis control system including the cylinder and the servo mechanism, the camera, the lighting, the configuration of the torch and the roller, etc. This becomes easy. Therefore, the work is convenient and the working environment is improved, as well as can produce a large amount of excellent products in a convenient working environment has the effect of improving the work efficiency.

1 is a schematic front view of a circumferential welder according to the present invention;
2 is a schematic side view of a circumferential welder according to the present invention.
Figure 3 is a side view for explaining the operating state of the lighting and camera of the present invention
Figure 4 is a perspective view for explaining the operating state of the lighting and camera of the present invention
Figure 5 is an enlarged view of the junction line of the cylinder for explaining the operating state of the lighting and camera of the present invention;
Figure 6 is a side view for explaining the operating state of the roller, torch and welding rod feeder of the present invention
Figure 7 is a front view for explaining the operating state of the roller, torch and welding rod feeder of the present invention
8 is a front view for explaining a means for supporting the cylinder of the present invention.

Hereinafter, the circumferential welder according to a preferred embodiment to achieve the object of the present invention will be described in detail, but the detailed description of the known functions, configurations and systems related to the present invention in the description does not correspond to the gist of the present invention. If not, a detailed description thereof will be omitted.

1 is a schematic front view of a circumferential welder according to the present invention, and FIG. 2 is a schematic side view of a circumferential welder according to the present invention. In the present invention, as shown in Figures 1 and 2, the installation of the work room 10 is separated from the operator so that the welding light is not exposed to the outside due to the nature of the welding work. In addition, on the side of the work room 10, in order to control the present invention as a whole, the operation unit 15 is provided to set detailed setting values of the respective components.

The present invention is to weld the product along the outer circumferential surface of the cylinder 20, such as a hot tub, the shape of the hot water tank, as shown in FIG. On both sides of the 20, the jig 11 which can stably tighten the cylinder 20 and then rotate it is provided.

On the other hand, the upper portion of the cylinder 20 is equipped with a camera 32 and the illumination 30 and the torch 45 and the roller 40, the welding rod feeder 43, etc., which is a characteristic configuration of the present invention, As a lower, left, and right operation, the three-dimensional operation is implemented through a multi-axis control system including a cylinder 14, a servo motor 13, and the like. The method using the 3D multi-axis control system is well known in the art, and thus a detailed description thereof will be omitted.

Figure 3 is a side view for explaining the operating state of the light and the camera of the present invention, Figure 4 is a perspective view for explaining the operating state of the light and the camera of the present invention, Figure 5 is an operating state of the light and the camera of the present invention It is an enlarged view of a cylindrical joint in order to demonstrate.

First, the metal plate is bent to face both ends, and the body 21 of the cylinder 20 is prepared by welding to a predetermined position of the joint. In addition, by using a technique such as pressing a metal plate to prepare two concave shaped cap 22 is convex inside, and then the cap 22 to the opposite ends of the body 21 of the cylinder 20 The base material is prepared in the state welded by spot welding at the fixed part of the part to be joined.

As described above, since the cylinder 20 and the cap 22 are difficult to be formed in a round shape during the molding process, the joint line 23 of the cylinder 20 welded by spot welding is formed at the front. It doesn't look straight. The present invention intends to weld the body 21 and the cap 22 by moving left and right along the joint line 23 deviated from the straight line even though the joint line 23 for welding is deviated from the straight line.

Therefore, the shape of the joint line 23 formed between the body 21 and the cap 22 of the cylinder 20, that is, the joint line 23 formed along the circumferential surface of the cylinder 20, should be understood first. As shown in FIGS. 3 to 5, the joint line 23 was identified through the camera 32 and the illumination 30. FIG. 5 is an enlarged view of a joint line of a cylinder for explaining the operation state of the lighting and camera of the present invention. As shown in the enlarged view of the cylinder in FIG. 5, a cap 22 is normally attached to the body 21 of the cylinder 20. When fitted, the tip of the cap 22 is inserted into the body 21.

Therefore, when the illumination 30 is illuminated toward the junction line 23 and is inclinedly illuminated, the same shade 34 as the copper line of the junction line 23 is created on the opposite side. This shadow 34 is photographed by the camera 32 installed on the upper part of the joint line 23, and the photographed screen is sent to the operation unit 15. After the welding is made along the copper wire of the photographed shadow (34).

The lighting 30 is mounted through the lighting installation table 31 directly above the cylinder 20, as shown in FIGS. On one side of the lighting mounting 31 is installed so that the camera 32 can photograph the shadow 34 of the bonding line 23 at a predetermined angle through the camera mounting 33. The illumination 30 and the camera 32 are moved downwardly in which the cylinder 20 is placed in accordance with the stroke operation of the cylinder 14 by a preset value of the operation unit 15.

Subsequently, as shown in FIG. 8, the cylinder 20 is rotated by the rotation of the jig 11 and the servomotor 13 supporting the cylinder 20 from the side, and the cylinder 30 is rotated by the illumination 30 while being rotated. The camera 32 captures the shadows 34 formed on the surface of 20, so that the copper wires of the joint line 23 on the outer circumferential surface of the cylinder 20 are captured by the camera 32. The lighting 30 is to make the shadow 34 of the seam 23 when the camera 32 is photographed. If the camera 32 can directly capture the shape of the seam line 23 of the seam 23 without the shadow 34, the camera 32 can be directly photographed. The illumination 30 may be turned off. That is, in the present embodiment, since the cylinder 20 is made of stainless steel, the light of the camera 32 is reflected by the characteristics of the stainless steel, so that the bonding line 23 can not be distinguished at the time of photographing the bonding line 23.

Therefore, when the cylinder 20 is made of a material that reflects the light of the camera 32, the illumination 30 is installed to grasp the joint line 23 by making a shade 34 on the surface of the cylinder 20. . Therefore, when the cylinder 20 is made of a non-reflective material, it may be possible to photograph the joint line 23 directly with the lighting 30 turned off. Of course, it is also possible to leave the lighting 30 and to make a shadow 34 of the seam 23 to photograph.

Figure 6 is a side view for explaining the operating state of the roller, torch and welding rod feeder of the present invention, Figure 7 is a front view for explaining the operating state of the roller, torch and welding rod feeder of the present invention. As described above, when the copper wire of the joint line 23 is photographed by the camera 32 through the illumination 30 and the camera 32 and sent to the operation unit 15, the illumination 30 and the camera 32 are the cylinders 14. 6, 7, the roller 40, the welding rod feeder 43, and the torch 45 are lowered down by the operation of another cylinder 14, as shown in FIGS. come.

When the roller 40 is seated in contact with the outer circumferential surface of the cylinder 20, as shown in FIG. 8, the jig 11 supporting the side surface of the cylinder 20 is moved slowly by the servo motor 13 to the cylinder 20. ) Will rotate. In this case, the welding rod is drawn out from the welding rod feeder 43 installed at the rear of the roller 40 as shown in FIG. 6, and the joint line 23 is welded while the flame is generated in the torch 45 as shown in FIG. 7. As shown in FIG. 6, the roller 40 is mounted to the roller mounting base 41, and the welding rod supplier 43 is mounted through the welding rod mounting portion 44 connected to the rear side of the roller mounting base 41. In addition, as shown in FIG. 7, the torch 45 is mounted through the torch mount 46 connected to one side of the roller mount 41, so that the torch 45 may move up and down by the stroke of the cylinder 14. The torch 45, the welding rod feeder 43 will be moved up and down at the same time.

On the other hand, when the cylinder 20 is rotated, the torch 45 should move left and right along the shade 34 of the joint line 23 previously input, the torch 45 and the welding rod feeder 43, the roller 40 Right and left operation of the) is implemented through a three-dimensional multi-axis system, including the servo motor 13, the present invention is not limited to the type and method of the three-dimensional multi-axis control system, the technique using the three-dimensional multi-axis control system is known Since it is a technology, a detailed description thereof will be omitted.

On the other hand, as shown in Figs. 6 and 7, the spring 42 is mounted on the upper portion of the roller 40 as an elastic means. The spring 42 has the thickness of the weld bead welded in consideration of the fact that the cylinder 20 is not in a rounded state when the roller 40 rolls in place along the outer circumferential surface of the rotating cylinder 20. Is installed to be created constantly. That is, when the roller 40 is mechanically moved up and down along the curved surface of the cylinder 20 due to the spring 42, the gap between the outer circumferential surface of the cylinder 20, the torch 45, and the welding rod feeder 43 is the same. In this case, the thickness of the weld bead is uniformly generated, thereby making the bonding strength uniform.

In addition, as shown in FIG. 8, the cylinder 20 is rotated by 360 ° by the jig 11 and the servomotor 13 supporting the cylinder 20 from the side as shown in FIG. 8, wherein the starting point and the ending point of the welding bead are Met. In the present invention, the end point of the welding bead is set on the operation unit 15 so that the end of the welding bead is rotated by about 370 ° when the cylinder 20 is rotated to finish by about 10 °. This is to ensure that the end point overlaps the start point of the weld bead to achieve a perfect seal. On the other hand, after the cylinder 20 is rotated 360 ° according to the setting of the operation unit 15, the torch 45 and the welding rod feeder 43 are raised upward by the thickness of the welding bead so as not to hit the welding bead at the starting point. Setting in 15) is preferred.

Meanwhile, as shown in FIG. 7, a cooling nozzle 50 for injecting cool air into the joint line 23 is disposed on the bottom surface of the cylinder 20. This is to cool the portion of the junction line 23 is heated at high temperatures through the flame of the torch 45 in the process of welding, so that the copper line of the junction line 23 is not deformed during the welding process. As a result, inconsistency of the joint line 23 in the process of welding the copper wire of the joint line 23 photographed through the camera 32 at the initial stage prevents the production of a defective product.

The configuration of the camera 32 and the illumination 30 and the configuration of the roller 40, the torch 45, and the welding rod feeder 43 are all straight toward the cylinder 20 by one stroke operation of the cylinder 14. After exercising, the working position is determined by the length of the stroke. Therefore, in order to apply the present invention to the cylinder 20 of various sizes, it is preferable that some kind of mechanism including a servo mechanism is installed so that the cylinder 14 itself moves up and down. Such a servo mechanism relates to a known three-dimensional multi-axis system, and detailed description thereof will be omitted.

As described above, when the circumferential welder according to the present invention is used, although the body 21 and the cap 22 of the cylinder 20 are not round, the camera 32, the illumination 30 and the torch The configuration of the 45 and the roller 40, etc., facilitates welding of the joining line 23 through the multi-axis control system including the cylinder 14 and the servo mechanism. Therefore, the working efficiency is improved and the working environment is improved, and the work efficiency is improved by being able to produce a large amount of excellent products in a convenient working environment.

10: workroom
11: jig
12: Stand
13: Servo Motor
14: cylinder
15: control panel
20: cylinder
21: Body
22: cap
23: seam
30: lighting
31: lighting fixture
32: camera
33: camera mount
34: shading
40: roller
41: roller mounting stand
42: spring
43: welding rod feeder
44: welding rod mounting stand
45: torch
46: torch mount
50: cooling nozzle

Claims (2)

The cylinder 20 in a state where the body 21 and the cap 22 are in contact with each other is fixed through the pedestal 12 and the jig 11, and the joint line 23 in which the body 21 and the cap 22 are in contact with each other. Directly above the camera 32 and the illumination 30 is installed to move up and down linearly by the operation of the cylinder 14, when the cylinder 20 is rotated by the servo motor 13, the illumination 30 The shade 34 of the seam 23 is generated on the outer circumferential surface of the body 21, the shade 34 is photographed by the camera 32 and sent to the operation unit 15,
When the photographing of the shadow 34 is completed, the camera 32 and the lighting 30 are raised upwards according to the signal of the operation unit 15, and at the same time, the roller 40 and the welding rod feeder ( 43 and the torch 45 are installed so as to move up and down linearly by the operation of the cylinder 14, and by the servomotor 13 along the copper wire of the joint line 23 previously photographed when the cylinder 20 is rotated. The roller 40, the welding rod feeder 43, and the torch 45 move left and right, and at the same time, along the outer circumferential surface of the cylinder 20 rather than a round, the spring 42 mounted on the upper portion of the roller 40 Circumferential welder, characterized in that the welding line 23 of the body 21 and the cap 22 is welded with a welding bead of constant thickness while the roller 40 moves up and down by the elastic action of the.
The method according to claim 1,
The cooling nozzle 50 is installed below the cylindrical line 20 at the position of the joint line 23 to quickly cool the joint line 23 so that the joint line 23 is not deformed in the welding process, and thus the welding line photographed through the initial camera 32. A circumferential welder, characterized in that the copper wire of the joint line 23 in the process of welding with the shade 34 of 23 is prevented from becoming inconsistent.

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