KR20090006542A - Auto-welding apparatus - Google Patents

Abstract

An automatic welding apparatus is provided to improve operation efficiency by preventing a distance between a welding point and a welding torch from varying greatly when performing a continuous welding operation relative to a rotating welding object, thereby preventing the generation of a phenomenon that a welding flame is put out during the welding operation. An automatic welding apparatus comprises a gear box(100), a plurality of driving rollers(200), a driven roller(300), positioning stoppers(400), and a pusher(500). The gear box is installed on a plate-shaped board(B) formed on a top part of a base frame(F). The gear box has a plurality of gears engaged with one another therein, and has a motor driving the gears. The driving rollers are projected to a front face of the gear box such that the driving rollers are rotatably connected to the gears inside the gear box. The driven roller is vertically movably connected to a first cylinder installed on a vertical frame(V) connected to the top side of the gear box. The positioning stoppers decide a setting position of a welding object installed between the driving rollers and driven roller and engaged with the driving rollers and driven roller. The positioning stoppers are installed on left and right sides of the front face of the gear box such that the positioning stoppers are brought into contact with a back side of the welding object. The pusher is installed on the board such that the pusher is spaced from the front face of the gear box. The pusher is horizontally moved back and forth to pressurize a front side of the welding object. The automatic welding apparatus performs welding of the welding object while moving the welding object circularly.

Description

Automatic welding apparatus {Auto-welding apparatus}

The present invention relates to an automatic welding device, in particular, while welding while welding a welding object in a circular motion, a welding point can be formed at a certain point.

There are various kinds of welding, one of the widely used processing techniques, and the representative ones are arc welding, seam welding, electric resistance welding, MIG and TIG welding. While welding work generates a lot of heat and light, harmful gas components and risks of safety accidents, welding is still an important part of any processing technology. In addition, according to the skill and skill of the welding worker, a lot of difference in quality occurs when manufacturing the same product, and in recent years, automatic welding devices using a mechanical device has been widely spread.

An example of the automatic welding device is a device that continuously performs a welding operation while traveling, or a device that performs welding while moving along a predetermined track.

In particular, in the context of the present invention relates to an automatic welding device suitable for the case where the object to be welded is a circular product and the part requiring welding is also part of a continuous circle.

1 is a schematic perspective view showing the shape of the welding object to be welded by the automatic welding device according to the present invention. As shown, the welding object (M) is a flange (2) is formed so as to protrude to the end of the short pipe (1), it is necessary to weld the joint portion of the pipe (1) and the flange (2). That is, the portion to be welded is to form a continuous circle, and before the full-scale welding is to join the tubular body and the flange in the weldable state. However, the welding object (M) in the welding state does not form a perfect garden, so using the conventional automatic welding device had a limit in processing to have a continuous and excellent welding characteristics for the welding site. In particular, in the case where the welding object is rotated and the automatic welding is performed while the welding torch is fixed, if the distance between the welding torch and the welding region is changed irregularly, the spark may be turned off during welding, and thus the welding may be stopped.

Hereinafter, a schematic structure of an automatic welding apparatus according to the related art will be described, and FIG. 2 shows a perspective view thereof.

The prior art has a turntable 100 that is rotated as related to the "apparatus for adjusting the inclination angle of the welding turntable" of Republic of Korea Utility Model Registration No. 248919, which can fix the welding object on the turntable upper surface and perform automatic welding. It is equipment. In fixing the welding object on the turntable, the chuck is coupled to the turntable and the welding object is fixed using the chuck. Since the welding object itself does not form a garden, the welding torch is fixed in one position and the turntable is rotated. If the welding is carried out while the distance between the welding torch and the welding site is continuously changed, there is a limit to the complete welding.

Therefore, the present invention for solving the problems of the prior art as described above is to perform the welding while rotating the welding object, to provide an automatic welding device having a structure that can minimize the change in distance between the welding site and the welding torch. do.

In addition, it is another object of the present invention to provide an automatic welding device that can easily improve the operation efficiency by fixing or removing the welding object to perform the welding.

The present invention for achieving the object as described above, is provided with a welding torch is an automatic welding device that automatically performs welding,

A gear box installed on the plate-shaped board provided on the upper surface of the base frame, the gear box having a plurality of gears engaged therein and having a motor for driving the gears; A plurality of driving rollers protruding to the gear box front surface to be connected to the gears inside the gear box and rotated; A driven roller connected to a first cylinder installed in a vertical frame connected to an upper side of the gear box and vertically moving; Positioning stoppers installed on the left and right sides of the gearbox front surface to contact the rear surface of the welding object to determine a setting position of the welding object to be engaged between the driving roller and the driven roller; The pusher is installed on the board to be spaced apart to the front side of the gear box and is horizontally moved forward and backward to press the front portion of the welding object; and comprises an automatic welding device characterized in that the welding is made while circularly welding the object to be welded. It is about.

Preferably, in the automatic welding apparatus of the present invention, the board is connected to a rotating shaft installed on the upper surface of the base frame, and a tilting cylinder is provided to connect the rear surface of the base frame and the lower surface of the board, so that the board is operated by the tilting cylinder. It is suitable to be inclined to the front side of the base frame with the rotation axis as the pivot point.

Preferably, in the automatic welding device of the present invention, the automatic welding device is that a post to which the welding torch is mounted is installed on the board so that the welding torch is also inclined when the board is inclined.

Preferably, in the automatic welding device of the present invention, the welding torch is connected to the torch cylinder which is advanced back and forth, and thus the position adjustment is appropriate.

Preferably, in the automatic welding device of the present invention, the automatic welding device is coupled to one end of the vertical frame to be rotatable, and the other end is provided with an arm bent to support the upper edge of the welding object. The welding object may be caught by the arm to prevent the welding object from falling off or falling.

Preferably, in the automatic welding device of the present invention, the positioning stopper may be installed to the left and right upper side with the driving rollers interposed therebetween, and the portion in direct contact with the welding object may be configured to be the outer ring of the rotating bearing.

More preferably, in the automatic welding device of the present invention, the pusher includes: a bracket connected to the upper surface of the board and extending upward; A pusher cylinder installed in the bracket in a horizontal direction toward the front surface of the gear box; A connection plate connected to the piston of the pusher cylinder and symmetrically coupled to the left and right; It is installed on the left and right ends of the connecting plate, the outer ring portion is in contact with the front portion of the welding object rolling bearing; shall be configured to include.

The automatic welding device according to the present invention does not significantly change the distance between the welding point and the welding torch during continuous welding work on the rotating welding object, thereby preventing the phenomenon that the welding flame is turned off during welding, thereby improving work efficiency. At the same time, it is possible to maintain a constant welding characteristic for the welded portion, which is effective in solving problems such as poor welding.

And since the device does not require the skill of the work, anyone can easily operate and contribute to the production of a certain quality product.

Hereinafter, the automatic welding apparatus according to the present invention will be described in more detail and to help understand the technical spirit of the present invention by using specific embodiments. Accordingly, it is pointed out that the accompanying drawings are only one form of implementation and that such implementations as simple structural changes or equivalent elements by those skilled in the art are included in the scope of the present invention.

The automatic welding device according to the present invention includes the gear box 100, the driving roller 200, the driven roller 300, the positioning stopper 400 and the pusher 500 as the main components and the drive roller 200 ) Is connected to the gear (not shown) in the gearbox 100 is rotated and the welding object (M) is installed to be fitted between the driving roller 200 and the driven roller 300 and the positioning stopper 400 and The welding object M is supported and rotated by the pusher 500. The welding torch is disposed adjacent to the welding object to perform continuous welding at the welding point of the welding object to be rotated.

Attached Figure 3 is a schematic perspective view of an automatic welding device showing a first embodiment of the present invention, Figure 4 is a perspective view showing a state in which the welding object is installed in the automatic welding device is made.

As shown, the automatic welding device is provided with a base frame (F) for installation on the ground and the plate-like board (B) is installed on the upper surface of the base frame (F). The gearbox 100 is coupled to the upper surface of the board B. A plurality of gears (not shown) are engaged in the gearbox and a motor (not shown) is provided for driving the gears. The motor may be installed on the outer surface of the gearbox or may be installed inside the gearbox.

A plurality of drive rollers 200 are coupled to the front surface of the gear box 100, the drive rollers 200 are connected to the gear disposed in the gear box 100 is rotated. In this embodiment, two driving rollers are used as shown, and the driving rollers are rotated at the same speed.

And there is provided a driven roller 300 formed to correspond to the drive roller 200, the driven roller 300 has a form that can be moved in the vertical direction. The welding object M is engaged between the driving roller 200 and the driven roller 300, and the welding object M is rotated at a constant speed by the rotational force of the driving roller 200.

In more detail, in the installation structure of the driven roller 300, a vertical cylinder V is connected to an upper side of the gear box 100, and a first cylinder in which the piston is raised and lowered on the front surface of the vertical frame V is formed. (C1) is installed. The driven roller 300 is connected to the piston end of the first cylinder (C1) and the driven roller 300 forms a structure that can be rotated and the position can be changed up and down according to the operation of the first cylinder (C1) have. As the connecting structure of the piston and the driven roller 300 of the first cylinder (C1), the driven roller 300 is axially coupled by using a bracket-shaped bracket 310, and the upper surface of the bracket 310 To connect the buffer 320 is connected to the piston in the horizontal portion. The buffer 320 has a buffer plate 321 directly connected to the piston, the buffer plate 321 and the bracket 310 is connected by a plurality of bolts and the bolt has a form wrapped by a spring (322). Due to the structure as described above, when the driven roller 300 descends and comes into contact with the welding object M, the buffer 320 moves up and down appropriately, thereby pressing the welding object at an appropriate pressure.

On the other hand, it is preferable that the position of the first cylinder (C1) installed in the vertical frame (V) can also be changed. To this end, the screw (SC) is installed in the vertical direction at the rear side of the vertical frame (V), and the handle (H) is attached to the upper end to configure the screw to rotate. The coupling of the moving bundle 330 to the screw and connecting the first cylinder C1 to the moving bundle 330 enables the movement of the first cylinder C1. Since the maximum stroke that the piston of the first cylinder (C1) can move is limited, it is necessary to adjust the upper and lower positions of the first cylinder (C1) as necessary according to the size of the welding object, as described above, the first cylinder It is preferable to allow (C1) to be moved.

The shape of the welding object (M) suitable for welding using the automatic welding device according to the present invention is that the flange (2) is provided to protrude into the short pipe (1), as mentioned, the welding object (M) ) Is further provided with a positioning stopper 400 and a pusher 500 to stably set between the driving roller 200 and the driven roller 300.

The positioning stopper 400 is installed on the left and right sides of the gear box 100 so as to be formed at a position higher than the driving roller 200. The positioning stopper 400 is in contact with the rear surface of the welding object (M) engaged between the driving roller 200 and the driven roller (300) and the pusher 500 to be described later on the front of the welding object (M) Pressing will determine the position for the welding operation. In this embodiment, the positioning stopper 400 is in contact with the rear surface of the flange 2 of the welding object M, the outer surface of the tubular body 1 of the welding object is in contact with the driving roller 200 and the inner surface of the driven roller 300. ) Will come into contact.

A portion of the positioning stopper 400 which is in direct contact with the welding object M is formed of a bearing 410, and the outer ring of the bearing 410 is brought into contact with the welding object M in a rolling motion. The positioning stopper 400 is formed one by one on the upper left and right sides of the gear box 100 is provided with a mounting table 401 protruding from the gear box 100 and the B-shaped connector 402 is coupled to the mounting table 401 do. The connector 402 coupled to the mounting table 401 has a rectangular drilling hole 403 is formed can be fixed while changing its position. And the bearing 410 is coupled to the end of the connector 402 to form a structure that can be rotated.

The pusher 500 used for setting the welding object M together with the positioning stopper 400 is coupled to the upper surface of the board B while being spaced apart from the front side of the gear box 100 and the pusher 500 is welded. The movement is made back and forth to press the front part of the object M. In this embodiment, the pusher 500 includes a bracket 510, a pusher cylinder 520, a connecting plate 530, and a bearing 540, and the bracket 510 is formed on an upper surface of the board B. Connected to extend upwardly. The pusher cylinder 520 is coupled to the upper end of the bracket 510 in a horizontal direction, and the piston of the pusher cylinder 520 is disposed to face the front surface of the gearbox 100. Meanwhile, the connecting plate 530 is coupled to the piston of the pusher cylinder 520, and the connecting plate 530 is symmetrical from side to side, and bearings 540 are installed at left and right ends of the connecting plate. The outer ring of the bearing 540 is supported by the rolling motion in contact with the welding object (M). In connecting the connecting plate 530 to the piston, it is preferable to have a predetermined shock absorbing function using a spring, such as a method of connecting the driven roller 300 to the first cylinder (C1).

On the other hand, the automatic welding device is basically provided with a welding torch (not shown), the welding torch may be performed by bringing the welding work closer to the welding point of the set welding object. In order to install the welding torch, it is preferable to have a long post P on the upper surface of the board B. The welding torch may be installed using the post P. More specifically, the welding torch is restrained by the torch cylinder C2 to automatically adjust the position of the welding torch. That is, the torch cylinder (C2) is coupled to the post (P) to connect a welding torch to the piston of the torch cylinder (C2).

In constructing the automatic welding device according to the first embodiment of the present invention, it is more preferable to have an arm 600 that can catch the shaking of the welding object M at the upper end of the vertical frame V. Do. The welding object (M) is continuously rotated during operation is provided with an arm (600) that can support the upper end of the welded object in order to minimize the shaking of the welded object during rotation. The shape of the arm 600 may be variously modified so that it may be rotated based on one end in consideration of ease of use, and the welding object may be supported at the other end. For example, a slot (not shown) corresponding to the thickness of the flange may be formed, and the flange of the welding object may be inserted into the slot to reduce the shaking.

Next, the automatic welding apparatus according to the second embodiment of the present invention will be described. FIG. 5 shows a schematic perspective view of the automatic welding apparatus according to the second embodiment, and FIG. 6 shows a state after the change in the actual welding operation. Corresponds to the perspective view showing.

In the second embodiment, the configuration of the first embodiment is basically included and additionally, a rotation shaft 700 and a tilting cylinder 800 are further provided to enable smoother work during welding.

In the first embodiment, the board B is fixedly attached to the upper surface of the base frame F. In the second embodiment, the board B is rotated with respect to the base frame F within a predetermined range. There is a difference in the configuration to make it possible.

In order to have such a function, the rotation shaft 700 is installed on the upper surface of the base frame F, and the board B is connected to the rotation shaft 700 to have a structure that can be rotated. At the same time, there is a tilting cylinder 800 for connecting the rear side of the base frame (F) and the lower surface of the board (B), the board (B) by the operation of the tilting cylinder (800) rotates the rotating shaft (700) The dot is inclined toward the front side of the base frame F.

The upper surface of the board (B) is provided with a gear box 100, the front of the gear box drive roller 200 is formed, the driven roller 300 is also installed. The positioning stopper 400 and the pusher 500 are also the same as in the first embodiment. The welding object M is positioned between the driving roller 200 and the driven roller 300 and the pusher 500 is operated to push the welding object backward so that the positioning stopper 400 and the back of the welding object (back of the flange) ) Make contact. And the arm 600 formed in the upper end of the vertical frame (V) is in contact with the upper end of the welding object (M). In the second embodiment, the arm 600 has a bent end portion in contact with the welding object M. The arm 600 is rotated before the board B is tilted to weld the welding object M. FIG. The upper end of the hook is caught by the bent arm 600.

After the welding object is installed, the tilting cylinder 800 is operated to push the board B upwards, and thus the board B is tilted forward. When the board (B) is inclined, the welding object (M) is also inclined, and the force to be inclined toward the front side is generated, so that the welding object is naturally rotated in a state in which shaking is minimized. In the case of the first embodiment, since the object to be welded is rotated in the vertical state, the shaking is more compared with that in the inclined state as in the second embodiment. In addition, in the second embodiment, the arm 600 provided at the upper end of the vertical frame V is in contact with the upper end of the welding object M when the board B is inclined, thus preventing departure of the welding object. Maintain a constant position.

Meanwhile, in the second embodiment, the post P for installing the welding torch is coupled to the upper surface of the board B. When the board B is tilted, the post P and the welding torch are also tilted together. To lose.

The automatic welding device according to the present invention performs only the installation and removal of the welding object by the operator and other operations can be performed automatically and continuously according to a pre-programmed program. The detailed operation order among a plurality of components constituting the present invention can be variously changed and can be implemented by incorporating a hydraulic pressure technology.

The overall operating relationship of the automatic welding device by the configuration according to the second embodiment will be described schematically.

The welding object is placed between the driving roller and the driven roller while the board is horizontal, and the pusher is advanced to make the welding object contact with the positioning stopper, and the driven roller is lowered to pressurize with a constant force. The arm is then rotated to be in contact with the upper end of the welded object, and then the tilting cylinder is operated to tilt the board forward. The welding torch is positioned close to the welding point, and when the driving roller is operated while the welding object is inclined, the welding object rotates and welding is performed.

Since the welding object is in contact with the driving roller, driven roller, positioning stopper, pusher and arm and rotated at the same time, the shaking is minimized and smooth rotation is achieved, so the distance between the welding torch and the welding point does not interfere with continuous welding. It can be maintained at this level so that weldability can be improved.

The automatic welding device according to the present invention is a technique that is highly suitable for the manufacture of a product in which a flange is protruded and coupled to a tubular body, and is highly likely to be widely used.

1 is a schematic perspective view showing the shape of the welding object to be welded by the automatic welding device related to the present invention.

Figure 2 is a perspective view showing the structure of the automatic welding device according to the prior art.

Figure 3 is a schematic perspective view of an automatic welding device showing a first embodiment of the present invention.

Figure 4 is a perspective view showing a state in which the welding object is welded is installed in the automatic welding device.

5 is a schematic perspective view of an automatic welding device according to a second embodiment.

Figure 6 is a perspective view showing the state after the change in the actual welding operation.

<Description of Major Symbols Used in Drawings>

100: gear box 200: drive roller

300: driven roller 400: positioning stopper

500: pusher 600: arm

700: axis of rotation 800: tilting cylinder

F: Base Frame B: Board

V: Vertical frame H: Handle

Claims (3)

An automatic welding device which is equipped with a welding torch to perform welding automatically, A gear box installed on the plate-shaped board provided on the upper surface of the base frame, the gear box having a plurality of gears engaged therein and having a motor for driving the gears; A plurality of driving rollers protruding to the gear box front surface to be connected to the gears inside the gear box and rotated; A driven roller connected to a first cylinder installed in a vertical frame connected to an upper side of the gear box and vertically moving; Positioning stoppers installed on the left and right sides of the gearbox front surface to contact the rear surface of the welding object to determine a setting position of the welding object to be engaged between the driving roller and the driven roller; And a pusher installed on the board so as to be spaced apart from the front side of the gear box and horizontally moving forward and backward to press the front part of the welding object. The welding device is configured to perform a circular motion of the welding object. The method of claim 1, The board, A tilting cylinder is connected to a rotating shaft installed on the upper surface of the base frame and connects a rear surface of the base frame to a lower surface of the board, and the board tilts toward the front side of the base frame using the rotating shaft as the pivot point. Automatic welding device characterized in that the. The method according to claim 1 or 2, The automatic welding device, One end is coupled to the upper end of the vertical frame so as to be rotated, and the other end is provided with an arm bent to support the upper edge of the welded object so that the welded object is caught by the arm, thereby leaving or dropping the welded object. Automatic welding device characterized in that to prevent the.

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