KR101470451B1 - Welding apparatus for pipes - Google Patents

Abstract

The present invention seeks to provide an automatic welding apparatus for connecting a cylindrical body such as a pipe to each other. The welding apparatus according to the present invention includes a sliding block 20 installed on a bed 10 so as to be able to reciprocate linearly in a predetermined section; A pipe transfer means (12) installed on the sliding block for clamping the pipe (P) and transferring the pipe (P) for a predetermined interval; A flange piece 18 provided on the bed and capable of clamping and rotating the flange F and rotated by a stepping motor; A pipe rotating means (16) mounted on the flange (18) for clamping the pipe and rotating the clamped pipe as the flange (18); And pipe supporting means (11 or 14) capable of supporting the rotating pipe clamped by the pipe rotating means. The pipe clamping of the pipe conveying means is released in a state in which the end of the pipe is close to the flange by a predetermined distance from the flange by the pipe conveying means so that the pipe and the flange are synchronized The connecting part is welded while rotating.

Description

[0001] Welding apparatus for pipes [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe welding apparatus, and more particularly, to a welding apparatus configured to automatically weld two pipes or pipes and a flange while rotating them together.

When pipes and pipes with circular cross-sections are welded, pipes and elbows are welded, or welded between pipes and flanges, welding should be made around the circumference of a cylindrical body such as a pipe. In other words, such welding of the cylindrical bodies is difficult because of welding along the entire circumference of the cylindrical body, and the production efficiency is not high.

Generally, when welding between a pipe and a pipe or welding between a pipe and an elbow pipe, it is generally preferable to perform a substantial welding in which a plurality of cylinders to be welded are first connected by an available solder joint, . However, it is needless to say that such a conventional welding method is disadvantageous to mass production because it is performed not only by hand but also through an available welding process.

In order to solve such an inconvenience to manual work, an automatic welding apparatus for pipes has been proposed, but welding is carried out while rotating the pipes, but there is an incomplete aspect in terms of completely synchronizing the two pipes, In fact.

SUMMARY OF THE INVENTION The present invention has for its object to provide an automatic apparatus capable of welding two pipes such as a pipe and a pipe or a pipe and a flange to each other.

It is an object of the present invention to provide a welding apparatus capable of substantially mass production.

Other and further objects of the present invention will be apparent from the following description of the present invention.

A sliding block installed on the bed in a linear reciprocating motion; A pipe transfer means installed in the sliding block for clamping the pipe and transferring the pipe for a predetermined interval; A flange disposed on the bed, the flange being rotatable by clamping the flange and rotated by the stepping motor; A pipe rotating means mounted on the flange, capable of clamping the pipe, and rotating the clamped pipe as the flange chuck; And pipe supporting means capable of supporting a rotating pipe clamped by said pipe rotating means; The piping and the pipe rotating means synchronously rotate the pipe and the flange by the pipe moving means and the pipe rotating means in a state in which the pipe clamping of the pipe feeding means is released while the end of the pipe is close to the flange with a constant gap by the pipe feeding means And the connecting portion can be welded.

According to a specific embodiment of the pipe conveying means, it is constituted by a pipe chuck having a pair of clamping portions at least one side of which is configured to be movable outward or inward relative to the radial direction of the pipe by the air cylinder, Is provided with a pair of clamping parts which are connected to the flange chuck by a connecting part and at least one side thereof is movable outward or inward with respect to the radial direction of the pipe by an air cylinder.

It is also preferable that the pipe chuck is connected to the flange chuck through an air cylinder so as to be movable along the axial direction of the pipe.

According to the embodiment of the pipe supporting means, the pipe supporting means is constituted by a pipe chuck having a pair of clamping portions at least one side of which is configured to be movable outward or inward with respect to the radial direction of the pipe by an air cylinder, And a pipe chuck capable of supporting a pipe rotating by a roll bearing even in a state where the pipe is clamped. Or a support provided on the bed and capable of supporting the bottom surface of the pipe. It goes without saying that it is also possible to simultaneously perform the pipe chuck and the support portion described above.

And a welding soil disposed at a connection portion between the pipe and the flange to weld the pipe and the flange. It is more preferable that the welding bolt is configured to be movable to the welding position by the robot.

According to the embodiment of the present invention, the sliding block is movably supported in the axial direction of the pipe by a sliding rail installed on the bed, and is configured to be movable in the pipe axis direction by the air cylinder supported by the bed have.

As described above, the present invention is explained through the embodiment for welding the pipe and the flange, but it goes without saying that the present invention can be practically applied to the connection of the cylindrical body such as the pipe. Further, by applying the welding apparatus according to the present invention, it is possible to weld the cylindrical pipe substantially automatically, and various effects such as automation of the process or improvement of the productivity can be expected.

According to the present invention, welding is performed while synchronizing two cylindrical bodies to be welded by using one drive source. Therefore, it is expected that the welding between the two can be performed more accurately and the reliability of the welding can be further increased.

According to the present invention, while the welded pipe and the flange are rotated, the welded soil and the other parts can be prevented from interfering with each other, It can be seen that there is a convenience in preventing the influence from being incurred.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary perspective view showing the overall configuration of a welding apparatus according to the present invention. FIG.
FIGS. 2 to 10 are front views showing welding processes of a pipe and a flange according to the present invention. FIG.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings.

First, a general configuration of a welding apparatus according to the present invention will be described with reference to FIG. The embodiment shown and described below is a welding apparatus configured to weld a pipe and a flange having the same diameter as the pipe to each other, and thus the present invention will be described. However, it goes without saying that the welding apparatus of the present invention is applicable to members having cylindrical portions having the same diameter, for example, pipes and pipes, pipes and elbows, pipes and flanges described below, and the like.

As shown in the figure, the pipe welding apparatus according to the present invention has a plurality of pipe chucks 12, 14, 16 for clamping a pipe to be welded. The plurality of pipe chucks each perform a function of gripping and transporting a pipe to be welded, supporting the rotation of the welded pipe in a gripped state, and holding and rotating the pipe, respectively.

The first pipe chuck 12 and the second pipe chuck 14 are installed on one sliding block 20 and a lower end of the sliding block 20 is connected to a pair of And is supported so as to be able to move in a linear motion by the sliding rails (22). It is needless to say that various modifications may be made in the portion where the lower end of the sliding block 20 is supported by the sliding rail 22 so as to be movable.

The sliding block 20 is configured to be reciprocated linearly in the direction of the sliding rail 22 by an air cylinder 26 supported by a supporting portion 24 connected to the bed 10. That is, the sliding block 20 is configured to be able to perform a linear reciprocating motion of a certain section by the air cylinder 26 operated by the entry / exit of air pressure. Here, it can be seen that the mounting direction of the sliding rail 22 and the moving direction of the air cylinder 26 are substantially the axial direction of the pipe.

The first pipe chuck 12 may be referred to as a chuck for transporting a pipe to be welded in the direction of the sliding rail 22 based on the operation of the air cylinder 26 in a state where the pipe is clamped. The second pipe chuck 14 is rotated in the process of welding the pipe, and is installed so as to support the rotating pipe. In order to support the rotating pipe in a clamped state, a roll bearing is provided on the inner surface of the second pipe chuck 14. [ However, the chuck itself in which the roll bearing is installed is known and is omitted for the sake of convenience.

And the third pipe chuck 16 is for substantially rotating the pipe in a clamped state. To this end, the third pipe chuck 16 is connected to the flange 18 via a connecting portion 16b (also shown in FIG. 2). Therefore, when the flange unit 18 rotates, the third pipe chuck 16 also rotates while clamping the pipe, thereby rotating the pipe.

The plurality of pipe chucks 12, 14, 16 perform the respective functions by clamping the pipes as described above. In the illustrated embodiment, the pair of clamping parts 12a, 14a, 16a. The clamping portions 12a, 14a, and 16a are formed so as to have a substantially semicircular (concave, arcuate) contact surface on the inner side facing each other, so that the circular pipe can be clamped therebetween.

The clamping portions 12a, 14a, and 16a are configured to be reciprocally movable on both sides by air cylinders 12c, 14c, and 16c, respectively. Therefore, by the operation of the air cylinders 12c, 14c, 16c, the clamping portions 12a, 14a, 16a can move outward or inward with respect to the radial direction of the pipe so as to clamp or unclamp the pipe. The operation of each of the pipe chucks 12, 14, 16 will be described later

The air cylinders 12c, 14c and 16c can operate the clamping portions 12a, 14a and 16a each of which is a pair of the clamping portions 12a, 14a and 16a, It is also possible to arrange only one of the sides in a fixed state and open or close the other side.

On the bed 10, a flange piece 18 for clamping and rotating the flange is provided, and the flange piece 8 is designed to be rotated by the stepping motor 19. The flange piece 18 is a chuck which is widely used in a machine tool such as a lathe or the like. The flange is inserted into a hole formed at the center of the flange and inserted into a circular arc, jaw) contact the outer diameter of the pipe while clamping the pipe. Here, the configuration of the flange 12 itself is well known, and a detailed description thereof will be omitted.

Hereinafter, the operation of the welding apparatus according to the present invention will be described with reference to FIG. 2 to FIG. In the following description, only the parts related to the operation will be described with reference to the corresponding drawings.

First, as shown in Fig. 2, a flange F is mounted on the front surface of the flange piece 18. [ Then, as shown in Fig. 3, the pipe P to be welded with the flange F is loaded. The flange F and the pipe P have the same diameter and are welded to each other as described above.

Loading of the pipe P means up to the operation of clamping the pipe P to the first pipe chuck 12 and the second pipe chuck 14. [ The first clamping portion 12a and the second clamping portion 14a are fixed to the first pipe chuck 12 and the second pipe chuck 14 by the air cylinders 12c and 14c The operation of substantially closing the pipe P is completed. At this time, in consideration of the length of the pipe P, a supporting portion 11 for simply supporting the rear end portion of the pipe P is provided on the bed 10. It is preferable that the upper surface of the support portion 11 is formed in a semicircular shape so that the cylindrical pipe P can be stably supported.

At this time, the leading end of the pipe should be set to coincide with the gap stopper 32 supported by the bed 10. The gap stopper 32 is installed to load the pipe P at an accurate position. When the loading of the pipe P is completed in this manner, the air cylinder 34 is driven to lower the cap stopper 32 as shown in Fig. 4, so that interference does not occur in the movement of the pipe.

Next, the air cylinder 26 is driven to move the sliding block 20 to the right in the drawing. The pipe P clamped by the first pipe chuck 12 and the second pipe chuck 14 also moves as the sliding block 20 moves along the sliding rail 22, Are aligned coaxially in front of the flange (F) and at the required constant gap. In FIG. 5, it can be seen that the flange F and the pipe P are arranged close to each other. In this state, the pipe P has passed through the third pipe chuck 16.

Next, as shown in Fig. 6, the third pipe chuck 16 is operated to clamp the pipe P. As shown in Fig. That is, the air cylinder 16c is operated and the pair of clamping portions 16a are brought close to each other, so that the pipe P is clamped to the third pipe chuck 16. As described above, since the third pipe chuck 16 is connected to the flange 18 by the connecting portion 16b, when the flange 18 is rotated, the third pipe chuck 16, So that the pipe P is rotated.

In this way, with the third pipe chuck 16 clamping the pipe, the first pipe chuck 12 is unclamped to hold the pipe P, as shown in Fig. And it proceeds by the operation of the unclamping air cylinder 12c of the first pipe chuck 12 as described above.

In this state, the pipe P is held by the support pipe 11 while the rear end portion of the pipe P is held by the third pipe chuck 16 and the second pipe chuck 14. Since the roll bearing is provided inside the clamping portion 14a of the second pipe chuck 14 as described above, the pipe P can be rotated and rotated even when the pipe P is clamped The pipe can be supported by the second pipe chuck 14.

When the above-described state is completed, it can be said that the welding can proceed substantially while the pipe P and the flange F face each other. Here, in order to weld the pipe P and the flange F to each other, a back shield gas must be supplied. A line 42 for supplying the back shield gas is inserted into the flange F from the rear side of the flange portion 18 so that the end portion of the pipe 42 contacts the pipe P and the flange F When the back shield gas can be supplied to the welding part, the welding is started.

As shown in FIG. 9, the welding is started by the welding soil T at a position adjacent to the welded portion between the pipe P and the flange F is activated and the stepping motor 19 is operated to perform the flange- 18 and the third pipe chuck 16 rotate simultaneously. That is, the welding is performed while the pipe P and the flange F rotate with respect to the welding soil T having a constant position.

The welding soil T can be actually positioned by a robot, and the welding soil T is installed on an arm of a robot capable of joint motion with respect to at least one axis. Therefore, the position of the welding soil T can be adjusted by the operation of the robot. For example, in the process of loading the pipe as described above, It will be possible.

The third pipe chuck 16 is connected to the flange 18 via a connecting portion 16b. Accordingly, when the flange unit 18 is rotated, the connecting unit 16b and the third pipe chuck 16 rotate together, and the actual welding is performed during the rotation process. 9, a portion of the third pipe chuck 16 and the connecting portion 16b connected thereto may cause interference with the welding soil T during rotation.

The welding is started by driving the welding torch (T) and the stepping motor (19), and the flange (18) and the third pipe chuck (16) are rotated together. As described above, when the pipe P is rotated at a predetermined angle (for example, 180 degrees), the welding P (P) and the flange (F) And the connection portion 16b may cause interference.

Therefore, in a state where the welding is completed within a certain angle range between the pipe P and the flange F, the following process is performed before the welding soil T and the connecting portion 16b interfere with each other. Unclamping of the third pipe chuck 16 progresses immediately before the rotating connection part 16b interferes with the unclamping of the third pipe chuck 16 by the action of the air cylinder 16c . That is, as shown in Fig. 9, when the clamping portion 16a is opened to the both sides by the air cylinder 16c, the pipe P held is unclamped.

The pipe P is supported by the supporting portion 11 and the second pipe chuck 14 while the welding is already performed within a certain angle range with the flange F There is no problem in continuing the welding.

After the third pipe chuck 16 unclamps the pipe P, as shown in Fig. 10, the third pipe chuck 16 and the connecting portion 16b are moved to the right in the drawing, Position. Here, the right movement of the connecting portion 16b is performed by an air cylinder 44 fixed to the flange 18 as shown in Figs.

That is, since the connecting portion 16b is connected to the piston 44a of the air cylinder 44 and the air cylinder 44 is attached to the flange portion 18, by driving the air cylinder 44 The third pipe chuck 16 and the connecting portion 16b are allowed to move to the right in the drawing and in this position substantially no interference with the welding soil T is caused.

Even in the process of moving the third pipe chuck 16 to the right as described above, the welding of the welding soil T is progressed while the rotation of the pipe P and the flange F is actually continued. When the pipe P and the flange F are rotated 360 degrees, the welding between the pipe P and the flange F is substantially completed, and in this state, the stepping motor 19 stops driving . When this process is completed, it can be seen that the welding between the pipe P and the flange F is actually completed, and then all the operations are completed by releasing the clamping state of the pipe P and the flange F. [

That is, since the first pipe chuck 12 is unclamped at the same time as the pipe starts rotating, when the second pipe chuck 14 and the flange 18 unclamp the pipe and the flange, The pipe and the flange can be drawn out to the outside.

As described above, according to the present invention, the pipe P and the flange F are clamped and rotated synchronously, and the welding soil T can be welded to the flange and the pipe during the rotation process. As shown in FIG. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10 ..... Bed
11 ..... support
12 ..... first pipe chuck
12a, 14a, 16a ..... clamping part
12c, 14c, 16c ..... air cylinder
14 ..... second pipe chuck
16 ..... third pipe chuck
16b ..... connection
18 ..... Flanged
19 ..... Stepping motor
20 ..... Sliding block
22 ..... sliding rail
24 ..... support
26 ..... Air cylinder
42 ..... back shield gas line
44 ..... Air cylinder

Claims (6)

A sliding block 20 installed on the bed so as to reciprocate linearly in a predetermined section;
A pipe transfer means installed in the sliding block for clamping the pipe P and transferring the pipe P for a predetermined interval;
A flange piece 18 provided on the bed and capable of clamping and rotating the flange F and rotated by a stepping motor;
Pipe rotating means mounted on the flange 18 for clamping the pipe and rotating the clamped pipe as the flange 18; And
Pipe supporting means capable of supporting a rotating pipe clamped by the pipe rotating means;
The pipe and the flange are rotated synchronously by the flange piece (18) and the pipe rotating means in a state where the end of the pipe is close to the flange by a predetermined distance by the pipe transfer means and the pipe clamping of the pipe transfer means is released, So that the connecting portion can be welded.
The pipe-making apparatus according to claim 1, wherein the pipe conveying means is constituted by a pipe chuck (12) having a pair of clamping portions at least one side of which is configured to be movable outward or inward with respect to the radial direction of the pipe by an air cylinder, The rotating means is composed of a pipe chuck (16) which is connected to the flange chuck by a connecting portion (16b) and which has a pair of clamping portions at least one side of which is configured to move outward or inward relative to the radial direction of the pipe by an air cylinder Pipe welding equipment.
3. The pipe welding apparatus according to claim 2, wherein the pipe chuck (16) is connected to the flange chuck via an air cylinder (44) and is configured to be movable along the axial direction of the pipe.
The pipe supporting apparatus according to any one of claims 1 to 3, wherein at least one side of the pipe supporting means is movable outward or inward with respect to the radial direction of the pipe by an air cylinder, and a roll bearing is provided inside, A pipe chuck 14 having a pair of clamping portions capable of supporting a pipe rotated by a roll bearing even in a state of being supported by the roll bearing or a support 11 capable of supporting the bottom surface of the pipe The pipe welding apparatus comprising:
The pipe welding apparatus according to claim 4, further comprising a welding soil disposed at a connecting portion between the pipe and the flange, the welding soil being welded to the pipe and the flange.
The sliding block according to claim 4, wherein the sliding block is movably supported by a sliding rail installed on a bed in an axial direction of the pipe, and the pipe is welded to the pipe by an air cylinder (26) Device.

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