TW201637761A - Automatic welding device and method thereof - Google Patents

Abstract

An automatic welding device for welding an inner wall of a metal elbow is disclosed. The automatic weld device includes a processor, a rotation unit, a welding gun and a moving unit. The rotation unit is electrically connected to the processor, and the metal elbow is fixed to the rotation unit. The moving unit is electrically connected to the processor, and the welding gun is fixed to the moving unit. While welding, the processor controls the rotation unit to rotate the metal elbow about a central axis, and controls the moving unit to move the welding gun in parallel to the central axis and in the metal elbow. An automatic welding method is also disclosed.

Description

Automatic welding device and method thereof

This invention relates to an automatic welding apparatus, and more particularly to an automatic welding apparatus for welding the inner wall of a metal elbow. The invention also relates to an automatic welding method.

At present, when using metal curved pipelines for transferring fluids, in order to prevent the transmitted fluid from corroding the pipeline, corrosion-resistant high-alloy materials are usually used, but the above materials are relatively expensive and may be caused by relatively insufficient strength, resulting in material thickness. The relative increase will further burden the cost. A common practice is to use a metal that is more resistant to corrosion as a solder to bond it to the inner wall of the metal elbow to achieve fluid corrosion resistance.

However, when the inner surface of the metal elbow is subjected to anti-corrosion treatment by the above method, uniform welding of the inner wall of the metal elbow is required. Otherwise, when the inner wall of the metal elbow is unevenly welded, the diameter of the metal elbow may vary greatly. This difference in aperture may cause a difference in the flow velocity of the fluid inside the metal elbow, and may even cause the accumulation of material in the fluid to solidify on the inner wall of the metal elbow, thereby accelerating the formation of corrosion and thereby detracting from the service life of the metal elbow.

In addition, the diameter of the metal elbow may be quite small depending on the requirements of the pipeline configuration. At this time, it may be difficult to perform the processing by the general welding method, let alone maintain the uniformity of the above welding. On the other hand, metal pipe bends are sometimes used in pipeline configuration. How to weld the inner wall of such metal pipe while maintaining the uniformity of welding is also a big problem.

In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide an automatic welding device suitable for welding the inner wall of a metal elbow to uniformly weld the inner wall of the metal elbow and can be used for having a small aperture and/or A metal elbow with a certain degree of bending.

According to an aspect of the invention, an automatic welding device is proposed which is suitable for welding the inner wall of a metal bent pipe. The automatic welding device includes a processor, a rotating unit, a welding gun, and a moving unit. The rotating unit is electrically connected to the processor and includes a clamp and a holder. The fixture includes a fixed platform, a connecting member, a connecting plate, and a rotating rod. The fixed platform has a fixed platform surface to secure the metal elbow to the surface of the fixed platform. The connecting member connects the fixed platform and the connecting plate such that the fixed platform and the connecting plate are perpendicular to each other. The rotating rod is coupled to the other side of the connecting plate relative to the side of the fixed platform. The gripper holds the rotating rod. The mobile unit is electrically connected to the processor, and the welding gun is fixed to the mobile unit. When welding, the processor controls the rotating unit and the moving unit, so that the rotating unit drives the fixed platform to rotate around the rotating rod, and causes the moving unit to drive the welding gun to move along a moving path parallel to the rotating rod and located in the metal bent pipe.

Preferably, the processor controls the rotating unit and the moving unit according to the aperture, the inner diameter and the outer diameter of the metal elbow and the predetermined number of turns input.

Preferably, the first opening surface and the second opening surface of the fixed metal elbow are on the surface of the fixed platform, and the moving path of the welding gun is parallel to the surface of the fixed platform, and is defined by the first opening surface and the second opening surface. The facets differ by less than 22.5 degrees.

Preferably, the connecting member may include a first screw that controls the fixed platform to move relative to the connecting plate in a first direction perpendicular to the rotating rod.

Preferably, the connecting member may include a second screw that controls the fixed platform to move relative to the connecting plate in a second direction perpendicular to the rotating rod and the first direction.

According to another object of the present invention, an automatic welding method suitable for welding the inner wall of a metal elbow is proposed. The automatic soldering method comprises the steps of: providing a processor; electrically connecting the rotating unit to the processor, wherein the rotating unit comprises a fixture and a holder, the fixture comprises a fixed platform having a fixed platform surface, a connecting plate, a combined fixing platform and a connecting plate a fixed platform and a connecting member perpendicular to the connecting plate, a rotating rod coupled to the other side of the connecting plate with respect to the side of the fixed platform, the holder clamping the rotating rod; and the fixed platform of the rotating unit combined with the metal bending tube; Connecting the mobile unit to the processor; combining the welding gun with the moving unit; and controlling the rotating unit and the moving unit by the processor, causing the rotating unit to drive the fixed platform to rotate around the rotating rod, and causing the moving unit to drive the welding torch parallel to the rotating rod The moving path in the metal elbow moves to weld the inner wall of the metal elbow.

Preferably, the processor controls the rotating unit and the moving unit according to the aperture, the inner diameter and the outer diameter of the metal elbow and the predetermined number of turns input.

Preferably, the first opening surface and the second opening surface of the fixed metal elbow are on the surface of the fixed platform, and the moving path of the welding gun is parallel to the surface of the fixed platform, and is defined by the first opening surface and the second opening surface. The facets differ by less than 22.5 degrees.

Preferably, the connecting member may comprise a first screw, and the automatic welding method may further comprise controlling, by the first screw, the fixed platform to move relative to the connecting plate in a first direction perpendicular to the rotating rod.

Preferably, the connecting member may comprise a second screw, and the automatic welding method may further comprise: controlling, by the second screw, the fixed platform to move relative to the connecting plate in a second direction perpendicular to the rotating rod and the first direction.

As described above, the automatic welding apparatus according to the present invention may have one or more of the following advantages:

(1) The automatic welding device can separately control the rotation and movement of the metal elbow and the welding gun by the calculation of the processor, thereby allowing the welding gun to uniformly weld the inner wall of the metal elbow.

(2) This automatic welding device can weld the inner wall of a metal bent pipe having a small diameter by using a small-sized welding torch.

(3) The automatic welding device can drive the rotation unit and the moving unit separately, whereby the driving mechanism for the rotation unit and the moving unit can be simplified.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and supplementary description. It is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be limited to the scope of patent application of the present invention. Narration.

Hereinafter, embodiments of the automatic welding device, the metal bending pipe and the automatic welding method according to the present invention will be described with reference to the related drawings. For ease of understanding, the same components in the following embodiments are denoted by the same symbols. To illustrate.

Please refer to FIG. 1 , which is a schematic diagram of the system of the first embodiment of the automatic welding device of the present invention. In the figure, the automatic welding device includes a processor 200, a rotating unit 300, a welding gun 500, and a moving unit 400. The rotating unit 300 is electrically connected to the processor 200 and includes a clamp 310 and a holder 360. Please refer to FIG. 2 at the same time, which is a schematic structural view of the side of the rotating unit 300 in the first embodiment of the automatic welding device of the present invention. In the figure, the jig 310 includes a fixed platform 320, a connecting member 330, a connecting plate 340, and a rotating lever 350. The fixed platform 320 has a fixed platform surface to secure the metal elbow 100 to the fixed platform surface. The connecting member 330 connects the fixed platform 320 and the connecting plate 340 such that the fixed platform 320 and the connecting plate 340 are perpendicular to each other. The rotating lever 350 is coupled to the other side of the connecting plate 340 with respect to the side of the fixed platform 320. The holder 360 holds the rotating lever 350. The mobile unit 400 is electrically connected to the processor 200, and the welding gun 500 is fixed to the mobile unit 400. When welding, the processor 200 controls the rotating unit 300 and the moving unit 400 to rotate the fixed platform 320 to rotate around the rotating rod 350, and causes the moving unit 400 to drive the welding torch 500 along the rotating rod and through the metal bending. The movement path X of the tube 100 moves.

Specifically, a predetermined computer program can be stored in the processor 200. When the user uses the automatic welding device of the present invention, parameters can be input to the main console of the processor 200, and then the processor 200 controls the rotation unit 300 and the moving unit 400 to rotate and move in a predetermined manner. In this way, when the metal elbow 100 is fixed on the rotating unit 300, the rotating unit 300 drives the metal elbow 100 to rotate. Similarly, when the welding gun 500 is fixed on the moving unit 400, the moving unit 400 will drive the welding gun 500 to move.

At the time of welding, the metal elbow 100 and the welding gun 500 are simultaneously rotated and moved, wherein the rotating unit 300 drives the metal elbow 100 to rotate the rotating rod 350, and the moving unit 400 drives the welding torch 500 along and parallel to the rotating rod 350. The moving path X of the metal elbow 100 is moved, at which time energy (such as an arc or laser) or solder can be supplied from the welding gun 500 to the inner wall of the metal elbow 100. Since the rotating unit 300 can rotate the metal elbow 100 at a constant speed, energy or solder can be uniformly supplied to the inner wall of the metal elbow 100 under the controllable movement of the welding gun 500. In the preferred embodiment, the welding torch 500 is not only moved parallel to the rotating rod 350, but the extending direction of the moving path X of the welding gun 500 can coincide with the rotating rod 350, thereby making it easier to control the energy or solder contact provided by the welding gun. The predetermined position of the inner wall of the metal elbow 100.

It is worth mentioning that the automatic welding device of the present invention simultaneously moves the two relative to each other as compared to moving the metal elbow 100 or the welding torch 500 alone. As such, the rotating unit 300 and the moving unit 400 may have only a single degree of freedom. The rotating unit 300 and the moving unit 400 of the present invention can be driven by only one driving motor individually, compared to the technique of operating the welding torch using a robot arm. Therefore, the cost of constructing the automatic welding device of the present invention can be greatly reduced, and the probability of failure in use is also greatly reduced, and the reliability of the automatic welding device of the present invention is further increased. Further, since the rotating unit 300 that drives the metal elbow 100 only needs to continuously rotate during welding, the driving motor that drives the rotating unit 300 actually only needs to be a fixed speed motor, and does not need to use a relatively precise driving such as a servo motor. Components can reduce the cost of construction and reduce the chance of errors during soldering.

When preparing to weld the inner wall of the metal elbow 100, the moving path X of the welding gun 500 and the direction of rotation of the metal elbow 100 must be easily adjustable. Therefore, if the power source that drives the rotation of the rotating unit 300 is directly coupled to the metal elbow 100, the degree of freedom of adjustment is limited, which is disadvantageous for the subsequent welding process. Therefore, in an embodiment of the present invention, the rotating unit 300 includes a jig 310 and a holder 360, wherein the jig 310 includes a fixed platform 320, a connecting member 330, a connecting plate 340, and a rotating lever 350. The fixed platform 320 has a fixed platform surface to secure the metal elbow 100 to the fixed platform surface. The connecting member 330 connects the fixed platform 320 and the connecting plate 340 such that the fixed platform 320 and the connecting plate 340 are perpendicular to each other. The rotating lever 350 is coupled to the other side of the connecting plate 340 with respect to the side of the fixed platform 320. The holder 360 holds the rotating rod 350. In some embodiments, the holder 360 is a three-jaw chuck. In this way, the metal elbow 100, the jig 310 and the holder 350 can be separated before welding, and can be assembled when preparing for welding, so that the rotation center of the metal elbow 100 and the welding gun 500 can be easily adjusted during welding. The movement path X passes through the angle and position of the metal bend 100.

Please refer to FIG. 3, which is a schematic view of the fixed platform combined with the metal elbow in the first embodiment of the automatic welding device of the present invention. In order to allow the rotating unit 300 to rotate the metal elbow 100 around the rotating rod 350 during welding, the rotating unit 300 may include a fixed platform 320 and fixing members 322a and 322b. The metal elbow 100 can be fixed to the fixed platform surface of the fixed platform 320 by the fixing members 322a and 322b. The fixed platform 320 can be driven by the rotating unit to rotate around the rotating lever 350. As a result, the metal elbow 100 fixed to the plane of the fixed platform also rotates around the rotating rod 350. More specifically, the fixed platform 320 has a plurality of holes 321 in the plane of the fixed platform, and each of the fixing members included in the rotating unit 300 includes a first cylinder, a second cylinder and a horizontal bar. For convenience of explanation, the fixing member 322a will be described below, but other fixing members included in the rotating unit 300 will contain the same structure and function in the same manner. The fixing member 322a includes a first cylinder 3221a, a second cylinder 3222a, and a horizontal bar 3223a. The cross section of the first cylinder 3221a and the second cylinder 3222a may correspond to the size of the plurality of holes 321 on the plane of the fixed platform. When the metal elbow 100 is fixed on the fixed platform surface of the fixed platform 320, the metal elbow 100 can be placed at a suitable position on the surface of the fixed platform, and the first cylinder 3221a and the second cylinder 3222a are respectively inserted into the metal elbow. Two holes 321 on both sides of the 100, and then the two sides of the horizontal bar 3223a are respectively combined with the first cylinder 3221a and the second cylinder 3222a away from one end of the fixed platform, and the metal bending pipe 100 is not adjusted relative to the fixed platform 320. mobile. The side surfaces of the first cylinder 3221a and the second cylinder 3222a may respectively have threads, and the rails 3223a may be coupled to the first cylinder 3221a and the second cylinder 3222a by a nut structure with a thread. Similarly, the inner surface of each hole 321 on the surface of the fixed platform may also have a thread structure corresponding to the side surface threads of the first cylinder 3221a and the second cylinder 3222a, and the first cylinder 3221a and the second cylinder 3222a may be locked. The screw is locked into the hole 321 to make the fixing function of the fixing member 322a more stable. It is to be noted that although the rotating unit 300 includes only two fixing members 322a and 322b in this embodiment, the present invention is not limited thereto. For example, the rotating unit 300 may include more than three fixing members to fix the metal elbow 100 on the fixed platform surface to make the combination of the metal elbow 100 and the rotating unit 300 more stable.

In addition, the distance between the plurality of holes 321 on the surface of the fixed platform can be determined according to the size of the metal bend 100 to be processed. Specifically, the metal elbow 100 manufactured or processed by the factory has several fixed specifications, and the distance between the plurality of holes 321 can be designed according to these specifications. Thus, the same fixed platform 320 can be easily used in the inner wall welding process of the metal elbow 100 of several specifications.

Preferably, the processor 200 of the automatic welding apparatus of the present invention can control the rotating unit 300 and the moving unit 400 according to the aperture, the inner diameter and the outer diameter of the metal elbow 100 and the predetermined number of turns input.

As described above, the automatic welding device of the present invention can also be applied to the metal elbow 100 having a certain degree of bending. Specifically, when the metal elbow 100 having a certain degree of bending is welded, the rotating unit 300 can still keep the metal elbow 100 rotating at the same angular velocity. In contrast, at this time, the moving unit 400 causes the welding gun 500 to perform a forward and backward swinging motion to uniformly weld the inner wall of the metal bent pipe. The rotational angular velocity of the metal elbow 100 and the manner of movement of the welding gun 500 may be determined according to the aperture, the inner diameter and the outer diameter of the metal elbow 100, and the predetermined number of turns input. These parameters may be used by the user in the processor 200 during use. Control interface input. For example, when the user inputs the inner diameter of the metal elbow 100 to the outer diameter of the control interface of the processor 200, it indicates that the metal elbow 100 to be welded is a straight tube, so the rotating unit 300 makes the metal elbow 100 Rotating at a certain angular velocity, and the moving unit 400 causes the welding torch 500 to advance or retreat on the moving path X at a certain speed. At this time, the angular velocity of the rotation of the metal elbow 100 and the moving speed of the welding gun 500 can be input by the user at the processor 200. The diameter of the metal elbow 100 and the predetermined number of turns of the weld are determined.

Please refer to FIG. 4, which is a schematic structural view of a welding torch 500 according to a second embodiment of the automatic welding device of the present invention. In the figure, the welding torch 500 may further include a consumable electrode 510 and a fire port 520. When soldering, the consumable electrode 510 is partially melted and then ejected from the fire port 520 to the inner wall of the metal elbow 100.

Since the purpose of welding the inner wall of the metal elbow 100 is generally to provide a metal having strong corrosion resistance on the inner wall of the metal elbow 100 to protect the metal elbow 100, the welding gun 500 may further include a consumable electrode 510, the consumable electrode 510. The material may be the aforementioned metal having high corrosion resistance. At the time of soldering, the consumable electrode 510 is partially melted by supplying a power source, and the consumable electrode 510 in a molten state is ejected onto the inner wall of the metal bent pipe 100 by the crater 520 of the welding torch 500. Since the automatic welding device of the present invention enables the welding torch 500 to uniformly weld the inner wall of the metal elbow 100, the consumable electrode 510 ejected onto the inner wall of the metal elbow 100 can form a solder on the inner wall of the metal elbow 100. Layer 120 has a uniformly distributed weld bead 121 thereon.

Please refer to Figure 4 again. In the figure, the welding gun 500 can further include a gas conduit 530 that is coupled to the fire port 520. When welded, gas may be supplied to the crater 520 through the gas conduit 530.

Since high temperatures are generated during welding, the metal at the weld is susceptible to chemical reaction with components in the air, such as oxygen and nitrogen, causing bubbles or unwanted compounds to form at the weld, resulting in reduced structural strength at the weld. Thus, the welding gun 500 can further include a gas conduit connected to the crater 520 for providing an inert gas or a semi-inert gas to the crater 520 so that the molten material formed during welding can be isolated from the air without reacting. In a preferred embodiment, the gas provided may be argon.

Please refer to FIG. 5A, which is a cross-sectional view showing the structure of a metal straight pipe 100a processed by the automatic welding device of the present invention. Please also refer to FIG. 5B, which is a cross-sectional view showing the structure of the metal elbow 100b processed by the automatic welding device of the present invention.

Specifically, the automatic welding device of the present invention can process the metal straight tube 100a and the inner wall of the metal elbow. In this embodiment, the consumable electrode 510 is included in the welding torch 500. As is apparent from the figure, the cross section of the metal straight tube 100a and the metal elbow 100b forms a two-layer structure, which is the outer metal tube layer 110 and the inner solder layer 120, respectively. The metal tube layer 110 is the structure of the metal elbow 100 itself, and the solder layer 120 is formed by melting the aforementioned consumable electrode 510 and then supplied from the welding gun 500 to the inner wall of the metal straight tube 100a and the metal elbow 100b. In the figure, the solder layer 120 has substantially the same thickness whether it is on the straight metal straight tube 100a or the curved metal bent tube 100b. Therefore, it can be seen that the automatic welding device of the present invention can uniformly weld the metal straight tube 100a. And the effect of the inner wall of the metal elbow 100b. On the other hand, it can be seen that the inside of the solder layer 120 of the metal straight tube 100a and the metal elbow 100b has a bead 121 structure, which is supplied with solder by the welding gun 500 to the metal straight tube 100a and the metal elbow 100b. The weld points of the wall move to form a substantially spiral shape. It is worth mentioning that not only on the solder layer 110 of the straight metal straight tube 100a, the bead 121 is evenly distributed on the solder layer 110 of the bent metal bent tube 100b. That is, the pitch of the bead 121 is substantially equal regardless of the inner or outer diameter of the metal bent pipe 100b of the elbow, which further illustrates the uniform welding metal straight pipe 100a of the automatic welding device of the present invention. And the effect of the inner wall of the metal elbow 100b.

Please refer to FIG. 6, which is a schematic view of a third embodiment of the automatic welding device of the present invention. In the figure, the metal elbow 100 has a first opening surface 130 and a second opening surface 140 parallel to the surface of the fixed platform, and the moving path X can be parallel to the fixed platform surface (that is, parallel to the rotating rod 350), and the first opening The surface 130 and the second opening surface 140 define a subsurface that is within 22.5 degrees of difference.

In general, in order to weld or otherwise weld the inner wall of the metal elbow 100, it is preferred that the open face of the metal elbow 100 be a tangential cross section of the metal elbow 100 (that is, when the metal is When the elbow 100 is cylindrical, its opening surface is substantially circular). As such, when the metal elbow 100 is fixed to the surface of the fixed platform, the first opening surface 130 and the second opening surface 140 of the metal elbow 100 are substantially parallel to the fixed platform surface of the fixed platform 320. Referring to the left side of FIG. 6, the drawing shows a plane parallel to the surface of the fixed platform, and the two broken lines respectively represent the first opening surface 130 and the second opening surface 140 of the metal bending tube 100. In order to allow the welding gun 500 to weld the inner wall of the metal elbow 100 more uniformly and completely, the movement path X as the rotation center of the metal elbow 100 during welding and defining the moving direction of the welding gun 500 may be the first opening surface 130 of the metal elbow 100. Defined with the second opening face 140. More specifically, please refer to the bottom of Figure 5, which schematically shows an embodiment of how to define the central axis X direction. In the figure, the first opening surface 130 and the second opening surface 140 defined by the metal elbow 100 will intersect a line perpendicular to the plane of the drawing (the point in the figure is a point), and the line can define the middle plane It divides the angle formed by the first opening surface 130 and the second opening surface 140 into two halves. Thus, the central axis X can be set parallel to the plane of the drawing (i.e., parallel to the surface of the fixed platform) and within an angle of 22.5 degrees from the mid-section (indicated by angle θ in Figure 6). In this way, the direction of the movement path X can be determined, thereby determining the relationship between the direction in which the welding gun 500 moves and the direction in which the fixed platform 320 rotates. In an embodiment, after the metal bent pipe 100 is fixed and the direction of the moving path X is determined, the extended straight line of the moving path X can be further defined as a straight line passing through the inside of the metal bent pipe 100, so that the welding torch 500 can be in the metal during welding. The elbow 100 moves inside.

Please refer to Figure 2 again. In the figure, the connecting member 330 can include a first screw 331 that controls the fixed platform 320 to move relative to the connecting plate 340 in a first direction perpendicular to the rotating rod 350.

In order to adjust the manner of rotation of the metal elbow 100 after the fixed metal elbow 100 is fixed to the platform 320, the connecting member 330 may include the first screw 331. When the first screw 331 is rotated, the fixed platform 320 is movable relative to the connection plate 340 in a first direction perpendicular to the rotation lever 350. At this time, since the connecting plate 340 is coupled to the rotating lever 350 and the rotating lever 350 is the rotating center of the metal bending pipe 100 during welding, the relative movement of the fixed platform 320 and the connecting plate can be used to adjust the metal bending pipe 100 during welding. The center of rotation. That is to say, in addition to rotating around the rotating lever 350, the rotating unit 300 of this embodiment can also have a one-dimensional freedom by the relative position between the fixed platform 320 and the connecting platform 340 by the first screw 331 of the connecting member 330. In this way, the center of rotation of the metal elbow 100 can be adjusted after the metal elbow 100 is fixed.

Please refer to FIG. 7, which is a schematic view of a fourth embodiment of the automatic welding device of the present invention. In the figure, the connecting member 330 can include a second screw 332 that controls the fixed platform 320 to move relative to the connecting plate 340 in a second direction perpendicular to the rotating rod 350 and the first direction.

In order to make the adjustment of the fixed platform 320 relative to the connection plate 340 more flexible, the connection member 330 may further include a second screw 332. When the second screw 332 is rotated, the fixed platform 320 can move relative to the connection plate 340 in the second direction. The second direction is perpendicular to the rotating rod 350 and the aforementioned first direction. In other words, by the first screw 331 and the second screw 332 of the connecting member 330, the relative position between the fixed platform 320 and the connecting platform 340 can have two-dimensional degrees of freedom, thereby making the position adjustment of the metal elbow 100 more bouncy.

Please refer to FIG. 8, which is a flow chart of a fifth embodiment of the automatic soldering method of the present invention. In the figure, the automatic soldering method includes the following steps: step S1, providing a processor 200; step S2, electrically connecting the rotating unit 300 to the processor 200; and step S3, combining the metal elbow 100 with the rotating unit 300; step S4, electrical The mobile unit 400 is connected to the processor 200; in step S5, the welding gun 500 is coupled to the mobile unit 400; in step S6, the processor 200 controls the rotating unit 300 and the moving unit 400 to cause the rotating unit 300 to drive the metal bending tube 100 around the central axis X. Rotation, and the moving unit 400 drives the welding torch 500 parallel to the central axis X and moves in the metal elbow 100 for welding.

The above flow chart is merely illustrative, and steps S1 to S5 are only methods of setting the automatic welding device, so the sequence can be arbitrarily transferred. After the automatic welding device is installed, the inner wall of the metal elbow 100 can be welded as described in step S6. Since the metal elbow 100, the processor 200, the rotating unit 300, the moving unit 400, and the welding gun 500 are all connected or combined in a predetermined manner in steps S1 to S5, the metal elbow 100 can be centered on the axis X in step S6. For center rotation, the welding torch 500 is parallel to the central axis X and moves in the metal elbow 100, so that the welding gun 500 can uniformly weld the inner wall of the metal elbow 100. The details are as described in the above automatic welding device section, and therefore will not be described here.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

100, 100b‧‧‧metal elbow
100a‧‧‧metal straight tube
110‧‧‧Metal pipe layer
120‧‧‧ solder layer
121‧‧‧weld
130‧‧‧First open face
140‧‧‧second open face
200‧‧‧ processor
300‧‧‧Rotating unit
310‧‧‧Clamp
320‧‧‧Fixed platform
321‧‧‧ hole
322a, 322b‧‧‧Fixed components
3221a, 3221b‧‧‧ first cylinder
3222a, 3222b‧‧‧ second cylinder
3223a, 3223b‧‧‧bars
330‧‧‧Connecting components
331‧‧‧First screw
332‧‧‧Second screw
340‧‧‧Connecting plate
350‧‧‧Rotary lever
360‧‧‧Clamp
400‧‧‧Mobile unit
500‧‧‧ welding torch
510‧‧‧ expendable electrode
520‧‧‧Hot
530‧‧‧ gas pipeline
S1, S2, S3, S4, S5, S6‧‧ steps
X‧‧‧Moving path θ‧‧‧ angle

Figure 1 is a schematic view of the system of the first embodiment of the automatic welding apparatus of the present invention. Fig. 2 is a schematic view showing the specific configuration of the side surface of the rotary unit in the first embodiment of the automatic welding device of the present invention. Fig. 3 is a schematic view showing the fixed platform in combination with the metal elbow in the first embodiment of the automatic welding device of the present invention. Figure 4 is a schematic view showing the construction of a welding torch of a second embodiment of the automatic welding device of the present invention. Fig. 5A and Fig. 5B are respectively sectional views showing the structure of a metal straight pipe and a metal pipe which are processed by the automatic welding device of the present invention. Figure 6 is a schematic view showing a third embodiment of the automatic welding apparatus of the present invention. Figure 7 is a schematic view showing a fourth embodiment of the automatic welding apparatus of the present invention. Figure 8 is a flow chart showing a fifth embodiment of the automatic welding method of the present invention.

no

no

100‧‧‧Metal elbow

200‧‧‧ processor

300‧‧‧Rotating unit

400‧‧‧Mobile unit

500‧‧‧ welding torch

Claims (10)

An automatic welding device, which is suitable for welding an inner wall of a metal elbow, comprising: a processor; a rotating unit electrically connected to the processor, and comprising: a fixture comprising: a fixed platform; The system includes a fixed platform surface, the metal elbow is fixed on the surface of the fixed platform; a connecting member is coupled to the fixed platform and a connecting plate to make the fixed platform and the connecting plate perpendicular to each other; the connecting plate; and a rotation a rod coupled to the other side of the connecting plate with respect to one side of the fixed platform; and a holder for holding the rotating rod; a welding gun; and a moving unit electrically connected to the processor The welding gun is fixed to the moving unit, wherein when welding, the processor controls the rotating unit and the moving unit, so that the rotating unit drives the holder to rotate around the rotating rod, and drives the moving unit The torch is parallel to the Lever and through the path of movement of one of said metallic bending movement. The automatic welding device of claim 1, wherein the processor controls the rotating unit and the moving unit according to an aperture, an inner diameter and an outer diameter of the metal elbow and a predetermined number of turns input . The automatic welding device of claim 1, wherein the metal elbow has a first opening surface parallel to the fixed platform surface and a second opening surface, the moving path being parallel to the fixed platform surface, and And one of the first open surface and the second open surface defined by the second open surface is within 22.5 degrees. The automatic welding device of claim 1, wherein the connecting member comprises a first screw that controls the fixed platform to move relative to the connecting plate in a first direction perpendicular to one of the rotating rods. The automatic welding device of claim 4, wherein the connecting member comprises a second screw, the second screw controls the fixed platform relative to the connecting plate to be perpendicular to the rotating rod and the first direction Move in the second direction. An automatic welding method, which is suitable for welding to form an inner wall of one of the metal elbows of an elbow, comprising: providing a processor; electrically connecting a rotating unit to the processor, wherein the rotating unit comprises a jig and a holder comprising a fixing platform having a fixed platform surface, a connecting plate, a connecting member coupled to the fixing platform and the connecting plate, the fixing platform and the connecting plate are perpendicular to each other, and the connecting plate is coupled to the connecting plate Rotating the rod with respect to one of the other sides of one side of the fixed platform, the holder clamping the rotating rod; combining the metal bending tube to fix the platform to one of the rotating units; electrically connecting a moving unit to the processing Combining a welding gun with the moving unit; and controlling the rotating unit and the moving unit by the processor, causing the rotating unit to drive the fixed platform to rotate around the rotating rod, and causing the moving unit to drive the torch edge Moving along a moving path parallel to the rotating rod and located in the metal elbow to weld the inner wall of the metal elbow . The automatic welding method of claim 6, wherein the processor controls the rotating unit and the moving unit according to an aperture, an inner diameter and an outer diameter of the metal elbow and a predetermined number of turns input . The automatic welding method of claim 6, wherein the metal elbow has a first opening surface parallel to the fixed platform surface and a second opening surface, the central axis being parallel to the fixed platform surface, and And one of the first open surface and the second open surface defined by the second open surface is within 22.5 degrees. The automatic welding method of claim 6, wherein the connecting member comprises a first screw, the automatic welding method further comprising: controlling the fixed platform relative to the connecting plate by the first screw to be perpendicular to the One of the rotating levers moves in the first direction. The automatic welding method of claim 9, wherein the connecting member comprises a second screw, the automatic welding method further comprising: controlling the fixed platform relative to the connecting plate by the second screw to be perpendicular to the The rotating lever moves in a second direction with one of the first directions.