JP2001079662A - Equipment for welding metallic flange to metallic pipe end - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment for welding metallic flanges to a metallic pipe end with which inside fillet welding and outside fillet welding are performed as the metallic flanges are rotated with the metallic pipe to together and which realizes a substantial rationalization and labor saving in conventional tack welding work, inside fillet welding work and outside fillet welding and in addition, cost-reduction. SOLUTION: The equipment has such a constitution that lower circumferential surface of metallic flanges 2 inserted with ends of a metallic pipe 1 are supported with a first and a second rings 8 and 9, and the upper parts of the metallic flanges 2 are pushed down with third support rings 10, and as the metallic flanges 2 and metallic pipe 1 are rotated by rotation of the 1st to 3rd support rings 8, 9 and 10, the circumferential edge parts of the hole for the pipe insertion of the metallic flange 2 and the pipe ends are fillet-welded in ring shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a flanged pipe by welding a metal flange to a metal pipe end.

[0002]

2. Description of the Related Art Conventionally, when manufacturing the above-mentioned pipe with a flange, as shown in FIG. 1, a pair of metal pipes 1 arranged side by side on a surface plate 3 while being lifted by a crane or lifted by a human operator. The metal pipe 1 on the pillow 4
Then, the worker lifts and inserts the metal flange 2 at one or both ends of the metal pipe 1 placed on the surface plate 3 and then inserts the metal flange 2 into the pipe insertion hole of the metal flange 2. Temporary welding (dotting) between hole edge and metal pipe end A
Then, a temporary welding assembly of the metal pipe 1 and the metal flange 2 is obtained.

As shown in FIG. 2, this temporary welding assembly is installed vertically on a rotating table 5 which is horizontally rotated by a human operator or a crane, that is, the outer surface of one of the metal flanges 2 is rotated. The temporary welding assembly is set upright on the table 5 and one of the temporarily welded metal flanges 2 is placed.
And the inside of one end of the metal pipe 1 is annularly fillet-welded B, and the temporary welding assembly is reversed, and the other metal flange 2 and the inside of the other end of the metal pipe 1 are annularly fillet-welded C, Further, as shown in FIG. 3, this temporary welding assembly is installed on a horizontal table by a crane or a human operator, and the outer edges of both metal flanges 2 and metal pipes 1 are annularly fillet-welded D, E
Thus, a metal flanged pipe was obtained.

[0004]

As described above, conventionally, a large amount of work and time is required for welding work for manufacturing a pipe with a metal flange, which has led to a decrease in productivity and an increase in cost. In addition, there is a problem that the mounting angle and the centering of the pipe and the flange vary.

[0005]

According to the present invention, a lower peripheral surface of a metal flange into which a pipe end of a metal pipe is inserted is defined as a first or a first flange.
The metal flange is received by the second support wheel, and the upper portion of the metal flange is pressed by the third support wheel, and the metal flange and the metal pipe are rotated by the rotation of the first to third support wheels. Then, the peripheral edge of the pipe insertion hole of the metal flange and the end of the pipe were welded in a ring shape to obtain a pipe with a metal flange.

According to the present invention, the inner fillet welding and the outer fillet weld can be performed while the metal flange is supported by the first to third support wheels and rotated together with the metal pipe. 1 can be achieved, the inner fillet welding operation shown in FIG. 2 and the outer fillet welding operation shown in FIG. 3 can be greatly rationalized and labor-saving, and the cost can be reduced.

The metal flange utilizes a bolt hole provided on the peripheral surface of the flange, and a lifting pin of a flange setting device is inserted into the bolt hole and lifted, and the metal flange is mounted on the first and second support wheels. Install.

The metal pipe is received by a jack, and the jack is moved up and down to perform centering with the pipe insertion hole.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 4, a fixed vertical frame 6 and a movable vertical frame 7 are installed so as to face each other, and each of the frames 6 and 7 is provided with a lower peripheral surface of the metal flange 2 on its facing surface side. The first and second support wheels 8 and 9 to be provided and the third support wheel 10 for holding the upper portion of the metal flange 2 are provided facing each other.

The first support wheels 8 and 8, the second support wheels 9 and 9 and the third support wheels 10 and 10 are respectively installed at a level which can be rotated about the same axis, and the first to third support wheels are provided. The support wheels 8, 9, 10 are installed such that the axes of the wheels 8, 9, 10 are parallel to each other and horizontal.

Alternatively, a support wheel adjusting device for adjusting the upper and lower levels by moving the respective support wheels 8, 9, 10 up and down is provided to set the relative position.

The movable vertical frame 7 is installed so as to be movable on the base 11 by a servomotor or the like. The movable vertical frame 7 approaches or separates from the fixed frame 6 by the movement, and has a relative interval corresponding to the length of the applicable metal pipe 1. Set.

The third support wheel 10 can be moved up and down, and a hydraulic or air cylinder 12 is attached to the upper ends of the fixed vertical frame 6 and the movable vertical frame 7 as moving means. Third support wheel 10
Is rotatably supported, and the third support wheel 10 is moved toward and away from the first and second support wheels 8 and 9 by the expansion and contraction of the piston rod 13 to set a relative interval. As a result, the lower peripheral surface of the metal flange 2 is received on the first and second support wheels 8 and 9, the upper portion of the flange 2 is pressed, and the flange 2 is connected to the first, second and third support wheels 8 and 9. Hold at 9 and 10.

Each of the first to third support wheels 8, 9, and 10 has an annular groove 36 having a V-shaped cross section on the outer peripheral surface thereof.
6, the circumferential surface of the metal flange 2 is fitted into the annular groove 36.
And hold it on the slope.

One of the first and second support wheels 8 and 9, for example, the first support wheel 8 is a drive wheel that is rotationally driven by a motor,
The first support wheel 8 is driven to rotate the metal flange 2,
With the rotation of the metal flange 2, the second and third support wheels 9, 10 are caused to rotate.

The metal flange 2 rotates while being held between the support wheels 8, 9, and 10 along an axis parallel to the axis of the first to third support wheels 8, 9, and 10.

A flange setting device 14 for mounting the metal flange 2 on the first and second support wheels 8 and 9 is installed on the fixed vertical frame 6 and the movable vertical frame 7, respectively.

The flange setting device 14 has a pair of suspension pins 16 which are inserted into bolt holes 15 provided at intervals on the peripheral surface of the metal flange 2 and lifted. The flange setting device 14 uses the hanging pin 1
There are provided means for adjusting the distance between 6, 6 and 16; means for moving up and down; and means for moving back and forth. FIGS. 9 and 10 show one example.

As shown in FIG. 1, the flange setting device 14 includes a manual handle 17 and a screw shaft 18 that is rotated by a motor. A left-handed male screw 20 is formed on the peripheral surface, that is, one screw shaft 18 is provided with male screws 19 and 20 in the opposite direction to the normal direction. Is externally screwed together with the female screw hole 22.

Each of the female screw cylinders 21 is provided with the hanging pins 16 protruding therefrom. Therefore, when the screw shaft 18 is rotated clockwise or counterclockwise by rotating the manual handle 17 clockwise or counterclockwise, the hanging pin 16 moves in the approaching or separating direction together with the female screw cylinder 21 in accordance with the rotation direction, Relative spacing is set. This relative interval is set to the same interval as the two bolt holes 15 of the metal flange 2. Therefore, FIGS. 5A and 5B
As shown in (2), the two bolt holes 15 of the metal flange 2 are inserted into and suspended from the suspension pins 16 at the intervals.

Next, means for moving the hanging pin 16 up and down and moving forward and backward will be described.

As shown in FIGS. 4 and 9, the screw shaft 18 is housed in a casing 23, and the hanging pins 16 are projected from an opening 24 provided in the casing 23. A manual handle 17 connected to one end of the screw shaft 18 is provided outside one end of the casing 23, and the casing 23 is supported by the vertical expansion and contraction means 25.

As the vertical expansion / contraction means 25, a screwing propulsion mechanism, a cylinder, or the like can be used. The vertical support 26 is vertically extended and contracted through the mechanism, so that the casing 23
Is moved up and down together with the screw shaft 18 and the suspension pin 16. Therefore, the metal flange 2 is lifted by the hanging pins 16 inserted into the bolt holes 15.

As a means for moving the suspension pins 16, a support 28 for supporting the vertical support 26 is provided on a guide table 29 provided on the fixed vertical frame 6 and the movable vertical frame 7 so as to be movable forward and backward. The propulsive force moves the support 28 forward and backward in the opposite direction via a motor, a cylinder, or a manual handle 30 and a transmission gear mechanism as shown in the drawing.
Then, the casing 23, the screw shaft 18, and the suspension pin 16 supported via the vertical support 26 are moved forward and backward in the relative direction.

Therefore, as shown in FIGS. 6A and 6B, the metal flange 2 suspended by the suspension pins 16 is brought onto the first and second support wheels 8 and 9, and the pins 16 are lowered to lower the support wheels. Place on 8 and 9. During this time, the third support wheel 10 is sufficiently separated above the first and second support wheels 8 and 9 and is left open.

Next, as shown in FIGS. 7A and 7B, the third support wheel 10 is lowered by the cylinder 12, and the upper part of the metal flange 2 supported on the first and second support wheels 8 and 9 is moved. Pressing, the flange 2 is supported at three points, the suspension pins 16 are retracted, and the suspension pins 16 are removed from the bolt holes 15.

Next, as shown in FIG. 8, the metal pipe 1 is lifted by a crane or human power, and one end of the metal pipe 1 is held by the first to third support wheels 8, 9, 10 of the fixed vertical frame 6. It is inserted into the flange hole 31 of the flange 2.

Next, the movable vertical frame 7 is moved in a direction approaching the fixed vertical frame 6 to
In addition, the other end of the metal pipe 1 is inserted into the flange hole 31 of the metal flange 2 held by the third support wheels 8, 9, 10.

The metal pipe 1 is received by a pair of jacks 32 installed on the base 11, and the jacks 32
The pipe 1 is moved up and down by the up and down movement to correct the inclination (set the horizontal level) and center the flange hole 31.
Since the flange hole 31 and the metal pipe 1 usually have some play, the inclination correction and centering are attempted within the range of the play.

The jack 32 is, for example, one that moves up and down through a transmission gear mechanism operated by a manual operation of a handle 33 or a motor, or uses a cylinder.

As described above, a state in which the metal pipe 1 is horizontally supported while the metal flange 2 is supported by the first to third support wheels 8, 9, 10 is formed. After welding the key points of the part using the welding torch 34, the first support wheel 8 is driven by the motor, and the metal flange 2 is rotated together with the metal pipe 1,
As shown in FIGS. 4 and 8, the torch 34 performs inner fillet welding and outer fillet welding in a ring shape at the pipe end and the peripheral edge of the flange hole 31.

Each of the welding torches 34 for performing the inner fillet welding and the outer fillet welding is fixed to fixed positions of the fixed vertical frame 6 and the movable vertical frame 7, and the metal flange 2 and the metal pipe 1 are connected to each other. Rotate to perform annular welding.

A means for detecting one rotation of the metal flange 2 and the metal pipe 1 is provided. For example, a rotating wheel 35 which is driven in contact with the outer peripheral surface of the flange 2 is provided. Stop post-rotation.

4 to 10 show an example in which the metal flanges 2 are welded to both ends of the metal pipe 1. However, the present invention relates to a case where the metal flanges 2 are welded only to one end of the metal pipe 1. including. In this case, one end of the metal pipe 1 is inserted while holding the metal flange 2 only between the first to third support wheels 8, 9, 10 of one of the vertical frames 6, 7. To set the level of the pipe 1 and perform the welding.

[0036]

According to the present invention, the metal flange is connected to the first flange.
The inner fillet welding and the outer fillet welding can be performed while being supported by the third support wheel and rotating together with the metal pipe. Conventional temporary welding work, inner fillet welding work, and outer fillet welding work can be performed. Can achieve significant rationalization and labor saving, and can also reduce costs.

[Brief description of the drawings]

FIG. 1 is a side sectional view illustrating a first welding step of a conventional metal flanged pipe.

FIG. 2 is a sectional side view for explaining the second welding step.

FIG. 3 is a side sectional view illustrating the third welding step.

FIG. 4 is a side view of an apparatus for welding a metal flange to a metal pipe end according to an embodiment of the present invention.

FIG. 5A is a front view illustrating a state in which a metal flange is brought on first and second support wheels, and FIG. 5B is a sectional view of the same.

FIG. 6A is a front view illustrating a state in which a metal flange is placed on first and second support wheels, and FIG. 6B is a sectional view of the same.

FIG. 7A is a front view illustrating a state in which an upper part of a metal flange is pressed by a third support wheel and supported at three points, and FIG.

FIG. 8 is a sectional side view for explaining a welding state of a metal pipe supported by the first to third support wheels and a metal pipe.

FIG. 9 is a front view of a flange setting device for mounting the metal flange on first and second support wheels.

FIG. 10 is a plan view of a main part of the flange setting device.

[Explanation of symbols]

 Reference Signs List 1 metal pipe 2 metal flange 6 fixed vertical frame 7 movable vertical frame 8 first support wheel 9 second support wheel 10 third support wheel 11 base 12 hydraulic or air cylinder 13 piston rod 14 flange setting device 15 bolt hole 16 suspension Pin 17 Handle 18 Screw shaft 19 Rightward male screw 20 Leftward male screw 21 Female screw cylinder 22 Female screw hole 23 Casing 24 Opening 25 Vertical expansion / contraction means 26 Vertical column 27 Handle 28 Support stand 29 Guide stand 30 Handle 31 Flange hole 32 Jack 33 Handle 34 Welding torch 35 Rotating wheel 36 Annular groove

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 21, 2000 (200.4.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

According to the present invention, a lower peripheral surface of a metal flange into which a pipe end of a metal pipe is inserted is defined as a first or a first flange.
The metal flange is received by the second support wheel, and the upper portion of the metal flange is pressed by the third support wheel, and the metal flange and the metal pipe are rotated by the rotation of the first to third support wheels. In addition, the peripheral edge of the pipe insertion hole of the metal flange and the above-mentioned pipe end are annularly fillet welded to obtain a metal flanged pipe. And the fixed vertical frame and the fixed vertical
The movable vertical frame that moves toward and away from the frame
The fixed vertical frame and the movable vertical frame
The first to third support wheels are respectively provided facing each other,
Due to the movement of the movable vertical frame, the two frames
For setting the relative distance between the first to third support wheels of the arm
To The husband of the fixed vertical frame and the movable vertical frame
Each is provided with a flange setting device. And
Each of the flange setting devices has the above-mentioned metal flange.
A pair of suspension pins inserted into the two bolt holes on the peripheral surface of
The hanging pins of each pair were formed with external threads in the forward and reverse directions.
Screwed onto the screw shaft,
By rotating, the relative distance between each pair of hanging pins is
Means to set to fit the two bolt holes in the
Means for vertically moving the pair of suspension pins, and
Means for moving forward and backward, and the upper and lower
The metal flange is lifted by
It was configured to be installed on the first and second support wheels .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

The movable vertical frame 7 is installed so as to be movable on the base 11 by a servomotor or the like .
The interval between the support wheels is set to a relative interval corresponding to the length of the metal pipe 1 to be adapted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

According to the apparatus shown in FIGS.
Holding different at both ends of the metal pipe 1 can be welded metal flange 2, and the metal flange 2 only between the first through third support wheel 8, 9, 10 of one of the vertical frame 6, 7 of and inserting one end of the metal pipe 1, performs a level setting of the pipe 1 by the jacks 32, metal pipe
It is also possible to weld the flange 2 to only one end of the flange 1.

Claims (3)

[Claims] A first support ring for receiving a lower peripheral surface of a metal flange into which a pipe end of the metal pipe is inserted, and an upper part of the metal flange pressed by a third support wheel; While rotating the metal flange and the metal pipe by the rotation of the first to third support wheels, the periphery of the pipe insertion hole of the metal flange and the pipe end are annularly fillet-welded. An apparatus for welding a metal flange to an end of a metal pipe having a configuration. 2. The apparatus according to claim 1, further comprising a flange setting device for lifting the metal flange with a hanging pin inserted into a bolt hole on a peripheral surface of the metal flange and installing the metal flange on the first and second support wheels. An apparatus for welding a metal flange to a metal pipe end according to claim 1. 3. A metal flange is welded to an end of a metal pipe according to claim 1, further comprising a jack for receiving the metal pipe, moving the metal pipe up and down, and centering the pipe with a pipe insertion hole. Equipment to do.