JPH10296356A - Temporary connecting method of pipe, and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously, easily and temporarily connect a plurality of pipes in their axial direction. SOLUTION: A rear end face 86 of a first pipe is pressed in the axial direction using rugged strap 2 to form a rugged surface 80. In temporarily connect a second pipe 82 to the first pipe 8, a forward end 85 of the second pipe 82 is abutted on the rear end face 86 of the first pipe 8, and the rear end face 86 of the second pipe 82 is pressed in the axial direction by the strap 2 to form a rugged surface 80 on the rear end face 86 of the second pipe 82, and the forward end face 85 of the second pipe is sunken into the rugged surface of the rear end face of the first pipe by the pressure to temporarily connect both pipes to each other. The pipes are similarly, successively, continuously and temporarily connected to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for temporarily connecting a pipe continuously in its axial direction.

[0002]

2. Description of the Related Art For example, as shown in Japanese Patent Application Laid-Open No. 60-54229, there is a processing line for performing bending or the like on a plurality of pipes of a predetermined length one by one. In such a conventional pipe processing line, pipes to be processed are supplied one by one to a processing apparatus, and pipes after processing are taken out one by one.

[0003]

However, the conventional pipe processing line has the following problems. That is, in the conventional pipe processing line, as described above, it is necessary to supply the pipe to be processed one by one to the processing apparatus and process the pipe. Therefore, regardless of whether the drive system is automatic or manual, the processing of the pipe is intermittent, which affects the reduction of production efficiency, the reduction of processing accuracy, and the like.

As a countermeasure against this, it is effective to connect a plurality of pipes to be processed continuously in the axial direction and supply the pipes in a state like one long continuous pipe. However, when a complete connection such as welding is performed, a step of separating the connection portion after pipe processing is required, which rather leads to a reduction in production efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and it is an object of the present invention to provide a pipe temporary connection method and a pipe temporary connection method capable of easily and temporarily temporarily connecting a plurality of pipes in the axial direction thereof. It is assumed that.

[0006]

A first aspect of the present invention is a temporary connection of pipes in which a front end face of a second pipe is temporarily connected to a rear end face of a first pipe, and thereafter pipes are temporarily connected to form a continuous pipe. In the method, an irregular surface is formed on the rear end surface of the first pipe by pressing the rear end surface of the first pipe in the axial direction using a metal plate having an irregular shape, and then the second pipe is temporarily connected to the first pipe. The front end of the second pipe is brought into contact with the rear end of the first pipe, and the rear end of the second pipe is pressed in the axial direction by the backing metal, so that the rear end of the second pipe is uneven. And forming a surface of the second pipe with the pressing force so that the front end face of the second pipe is recessed into the uneven surface of the rear end face of the first pipe.
Hereinafter, there is provided a pipe temporary connection method characterized in that pipes are connected temporarily sequentially in the same manner.

In the present invention, it is most remarkable that the uneven surface is sequentially formed on the rear end face of the pipe to be connected by using the metal plate having the uneven shape, and the next pipe is formed on the uneven surface. Temporary connection is performed by indenting the tip surface. For example, as shown in an embodiment described later, the uneven shape of the backing metal can be provided by a large number of grooves cut in the radial direction. In addition, unevenness of various shapes can be applied.

Next, the operation of the present invention will be described. In the pipe connecting method of the present invention, first, the rear end face of the first first pipe is pressed by the contact metal. This gives
On the rear end surface of the first first pipe, the uneven shape of the contact metal is transferred to form an uneven surface.

Next, the second pipe to be connected to the first pipe is brought into contact with the rear end face of the first pipe, and the rear end face of the second pipe is pressed by the metal plate. As a result, an uneven surface is formed on the rear end surface of the second pipe in the same manner as described above, while the front end surface of the second pipe is strongly pressed against the uneven surface of the first pipe by the pressing force of the contact metal. Immerse yourself.

[0010] That is, the front end surface of the second pipe is in a state in which the concave and convex shape of the concave and convex surface of the first pipe is transferred and the rear end surface of the first pipe is engaged. Thereby, the first pipe and the second pipe are temporarily connected to form a continuous pipe. Less than,
Even in the case where the third and subsequent pipes are temporarily connected in sequence, the rear end face of the pipe to be connected is pressed by using the above-mentioned contact metal in the same procedure as the temporary connection of the first pipe and the second pipe. , Can be easily temporarily connected.

Further, as described above, the connection portion of each pipe is formed by indenting the front end surface of the rear pipe into the uneven surface of the rear end surface of the front pipe. Therefore, if the pressing force is released after the temporary connection, the connection state is released relatively easily, and each pipe can be individualized.
Therefore, according to the present invention, a plurality of pipes can be temporarily and easily connected continuously in the axial direction, and the temporary connection can be easily released thereafter.

Next, the continuous pipe is advanced by the pressing force of the backing metal as in the second aspect of the present invention.
With the pressing force, the continuous pipe can be processed in front of the pressing direction. That is, the continuous pipe can be continuously processed by utilizing the pressing force as a processing force. In this case, since the processing is performed in the state of the continuous pipe, the processing operation can be performed very smoothly and efficiently. After processing, the pipes can be easily separated by releasing the pressing force. Therefore, the pipe processing operation can be performed much more efficiently than before.

Further, as in the third aspect of the present invention, the working can be a bending work for continuously bending the continuous pipe. In this case, since the plurality of pipes are the continuous pipes, the same smooth bending as the general part can be performed at the temporary connection portion at the pipe end. Therefore, the processing accuracy in the vicinity of the end can be improved as compared with the related art. In addition, as the above-mentioned processing, in addition to the above-mentioned bending processing, simple pipe expansion processing, diameter reduction processing, and other various processing can be applied.

Next, there is the following invention as an apparatus for carrying out the above-mentioned excellent pipe temporary connection method. That is, claim 4
A temporary pipe connecting apparatus for temporarily connecting a front end face of a second pipe to a rear end face of a first pipe, and then temporarily connecting pipes sequentially to form a continuous pipe as in the invention of the third aspect. The connecting device includes a metal plate having an uneven shape for forming an uneven surface on the rear end surface of each pipe, a pressing means for pressing the metal plate on the rear end surface of each pipe, and a pipe for temporarily connecting the pipe to the next rear end surface position. There is provided a pipe temporary connection device having a contact metal moving means for moving the metal contact.

The backing metal has the above-mentioned concave and convex shape, and the concave and convex shape can take a groove shape as described above and other various shapes. As the pressing means,
Various actuators can be applied. Also,
Various actuators can also be applied as the contact moving means. Note that the pressing means and the contact moving means can be used in combination.

According to the present temporary connection device, the temporary connection method can be reliably performed by using the above-mentioned pad, pressing means and pad moving means. Specifically, first, the contact metal is brought into contact with the rear end face of the first pipe, and the contact metal is pressed by the pressing means. As a result, an uneven surface is formed on the rear end surface of the first pipe as described above. Next, when pressing the rear end face of the second pipe, the backing metal is moved by the backing moving means to abut the rear end face of the second pipe. Then, the contact metal is pressed by the pressing means.

Due to this pressing force, an uneven surface is formed on the rear end surface of the second pipe, and the front end surface of the second pipe and the rear end surface of the first pipe are temporarily connected by the above-described indentation. In the temporary connection device, by repeating this series of operations for each new pipe, the above-described temporary connection can be continuously and reliably performed. Therefore, the continuous pipe can be easily manufactured.

Next, as in the invention of claim 5, the temporary connection device preferably has a pipe processing device for processing the continuous pipe by the pressing force of the pressing means. Thus, not only the formation of the uneven surface but also the processing of the continuous pipe can be continuously performed using the pressing force of the pressing means.

Further, as in the invention of claim 6, the pipe processing device can be a bending device for continuously bending the continuous pipe. In this case, the continuous pipe can be continuously and smoothly bent with high accuracy. Note that, instead of the bending device, a tube expanding device, a diameter reducing process, and other various devices can be provided.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment A method and apparatus for temporarily connecting pipes according to an embodiment of the present invention will be described with reference to FIGS. This example is a specific example in which the temporary connection method and apparatus of the present invention are applied to a pipe bending line 7 as shown in FIG. First, the temporary connection device 1 of the present example incorporated in the bending line 7
As shown in FIG. 1, as shown in FIG. 1, a metal plate 2 having an uneven shape for forming an uneven surface 80 on a rear end surface 86 of each pipe 8, a pressing means for pressing the metal plate 2 against the rear end surface 86 of each pipe 8,
And a contact moving means for moving the contact 2 to the rear end surface position of the pipe 8 to be temporarily connected next time.

In this embodiment, one pressing and moving means 3 is used as both the pressing means and the contact moving means. In addition, a bending device 4 for continuously bending a continuous pipe is provided in front of the pressing direction of the contact metal 2. The details are described below.

The bending line 7 is, as shown in FIG.
It comprises a core member 71 for guiding the pipe 8 from the inside, and a bending device 4 provided at the tip of the core member 71. As shown in FIGS. 1 and 10, the bending device 4 includes an expansion plug 41 for expanding the supplied pipe 8 and a bending jig 42 for bending the expanded pipe 8. The pipe expansion plug 41 is provided at the tip of the core member 71.

The contact 2 in the temporary connection device 1 is
As shown in FIG. 2 to FIG. 4, it is composed of a columnar portion 21 having an inner hole 20 having a diameter slightly larger than the core metal member 71, and a disk-shaped flange portion 22 provided on the tip side thereof. In the flange portion 22, the contact portion 23 near the inner peripheral edge is provided with an uneven shape. The contact portion 23 having the uneven shape is a portion that actually contacts the rear end face 86 of the pipe 8.

As shown in FIG. 2, this uneven shape is formed by a plurality of grooves 2 provided radially in the radial direction from the center axis of the backing metal.
11. Further, as shown in FIG. 2, the contact metal 2 is configured to be able to be divided into two right and left from a center line C along the axial direction.

As shown in FIG. 1, a pressing and moving means 3 having both a pressing function and a moving function of the backing plate 2 is provided.
Is a tail stock 31 having a pair of ball screws 32.
And a connecting member 33 for connecting the tail stock 31 and the pad 2. The ball screw 32 is connected to a motor via a belt (not shown), and is configured to rotate by driving the motor.

Then, by the rotation of the ball screw 32,
The tail stock 31 is configured to move in parallel along the cored bar 71, and accordingly, the contact plate 2 is moved forward and backward via the connecting member 33. Further, the connecting member 33 is provided with a dividing mechanism (not shown) for dividing the contact metal 2 into two right and left parts.

As shown in FIGS. 1 and 5, a metal core holding cylinder 7 for holding the metal core member 71 is provided upstream of the metal core member 71.
8 is provided. The core metal holding cylinder 78 is for holding the pipe expansion plug 41 and the core metal member 71 so as not to advance by the pipe 8 pressed by the pressing force of the backing metal 2.

As shown in FIG. 5, the core metal holding cylinder 78 has a U-shaped member 781 at its tip. On the other hand, a longitudinal groove 711 capable of engaging with the U-shaped member 781 is provided on the left and right sides of the core metal member 71. And a new pipe 8
When supplying the U-shaped member 781, the U-shaped member 781 is lifted by the core-bar holding cylinder 78, and the engagement between the U-shaped member 781 and the core bar 71 is released. An insertion passage for the pipe 8 is formed therebetween. On the other hand, when the pipe is pressed by the backing metal 2,
The letter-shaped member 781 is moved down so that it is engaged with the metal core member 71.

Next, the operation of the present embodiment will be described. First,
Raise the core metal holding cylinder 78 and move the U-shaped member 78
1 is disengaged from the core member 71, and the first
Insert the pipe 8. Then, when the insertion of the first pipe 8 is completed, the U-shaped member 781 and the metal core member 71 are engaged.

When the first pipe 8 is inserted, the backing plate 2 is held in a state of being divided into two parts by the dividing mechanism. Then, the first pipe 8 is inserted to the front of the pad 2 by passing through the inside of the pad 2 divided into right and left. Next, as shown in FIG. 6, the pad 2 is closed from the left and right sides to be integrated, and the pad 2 is advanced by the pressing and moving means 3. Then, the contact metal 2 is brought into contact with the rear end face 86 of the first pipe 8 and is pressed.

At this time, the abutment 2 causes the contact portion 23 having the uneven shape to abut on the rear end face 86 of the first pipe 8.
For this reason, as shown in FIG. 7, the unevenness of the abutting portion 23 of the pad 2 is transferred to the rear end face 86 of the first pipe 8 by the above pressing force, and the uneven surface 80 is formed on the rear end face 86.

At this time, the tip end of the first pipe 8 is brought into contact with the expansion plug 41 by the pressing force, and the first pipe 8 is gradually advanced. As a result, as shown in FIGS. 1 and 10, the first pipe 8 is made to penetrate the inside of the expanded pipe 41, pass through it, is expanded in diameter, and further bent by the bending jig 42 in a certain direction.

That is, the first pipe 8 is formed by forming the concave-convex surface 80 on the rear end face 86 and simultaneously bending it from the front end side by pushing the contact metal 2 contacting the rear end face 86 forward by the pressing and moving means. It is being processed. Then, when the contact metal 2 moves forward and reaches the position indicated by the reference symbol P (FIG. 1), the pushing forward of the metal contact 2 is temporarily stopped.

Next, the contact metal 2 is divided into two parts, left and right, and this is moved backward by the pressing and moving means 3. The second pipe 2 is inserted into the core member 71. At this time,
As described above, the mandrel holding cylinder 78 is operated so that the pipe can be inserted into the mandrel member 71. And the second
After the pipe 82 is inserted, the U-shaped member 78 and the core
1 to maintain the positions of the core member 71 and the expansion plug 41.

Next, the second pipe 82 inserted into the core member 71 is moved to the front of the backing 2. Then,
As shown in FIG. 8, similarly to the above, after the cover 2 is closed and integrated from the left and right, the press 2 is pressed forward by the pressing moving means 3. Thereby, as shown in FIG.
The uneven surface 8 is formed on the rear end face 86 of the second pipe 82 in the same manner as described above.
0 is formed, and the end face 85 of the second pipe 82 is formed.
Digs into the uneven surface 80 of the rear end surface 86 of the first pipe 8. Then, the first pipe 8 and the second pipe 82 are temporarily connected by this inset. That is, the first pipe 8
And the second pipe 82 constitute a continuous pipe 88.

Further, the interrupted bending is restarted by the pressing force. At this time, the first pipe 8 and the second pipe 8
The pipe 82 constitutes a continuous pipe 88 as described above. Therefore, the bending process is continuously performed from the general portion of the first pipe 8 to the general portion of the second pipe 82, including the temporary connection portion.

When the contact metal 2 moves forward and reaches the position indicated by the reference symbol P, the pushing forward of the contact metal 2 is stopped again.
Thereafter, the third pipe is inserted by the same procedure as the case of the insertion of the second pipe 82 and pressed by the pad 2, and the fourth and fifth pipes are inserted and pressed by the pad 2. Bending is performed continuously while producing continuous pipes one after another.

Each of the bent pipes 8 is released from the pressing force when the pipe 8 has passed through the bending jig 43.
It falls freely and is collected. Therefore, no special steps are required to re-separate the continuous pipe.

As described above, in the present embodiment, the abutting portion 23 of the backing plate 2 is provided with the uneven shape, so that the continuous pipe 88 is formed one after another and continuously including the temporary connecting portion. Can be bent. Therefore, bending can be performed with high accuracy even in the vicinity of the front end or the rear end of the pipe, for which sufficient bending accuracy could not be obtained conventionally.

[0040]

As described above, according to the present invention, it is possible to provide a pipe temporary connection method and a pipe temporary connection method capable of easily and temporarily temporarily connecting a plurality of pipes continuously in the axial direction.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a bending line in an embodiment.

FIG. 2 is a front view of a pad in the embodiment.

FIG. 3 is a side view of the divided contact metal viewed from the center in the embodiment.

FIG. 4 is a perspective view of a pad in the embodiment.

FIG. 5 is an explanatory diagram showing an engagement relationship between a U-shaped member and a cored bar member in the embodiment.

FIG. 6 is an explanatory diagram showing a state in which the first pipe is pressed by the contact metal in the embodiment.

FIG. 7 is an explanatory view showing a state in which an uneven surface is formed on a first pipe in the embodiment.

FIG. 8 is an explanatory diagram showing a state in which the second pipe is pressed by the contact metal in the embodiment.

FIG. 9 is an explanatory view showing a continuous pipe in the embodiment.

FIG. 10 is an explanatory view showing a state in which a pipe is being bent in the embodiment.

[Explanation of symbols]

 1. . . 1. Pipe temporary connection device, . . Deposit, 23. . . Abutment part, 3. . . 3. pressing moving means; . . 6. Bending equipment, . . Bending line, 71. . . 7. core metal member, . . pipe,

Continued on the front page (72) Inventor St. Takeuchi 2-1-1 Asahi-cho, Kariya-shi, Aichi Prefecture Aisin Seiki Co., Ltd.

Claims (6)

[Claims] In a method of temporarily connecting pipes, a front end face of a second pipe is temporarily connected to a rear end face of a first pipe, and subsequently, pipes are temporarily connected to form a continuous pipe. The rear end face of the first pipe is axially pressed with gold to form an uneven surface on the rear end face.
In temporarily connecting the second pipe to the pipe, the front end face of the second pipe is brought into contact with the rear end face of the first pipe, and the rear end face of the second pipe is axially pressed by the pad. An uneven surface is formed on the rear end surface of the second pipe, and the front end surface of the second pipe is sunk into the uneven surface of the rear end surface of the first pipe by the pressing force, whereby both are temporarily formed. A pipe temporary connection method characterized in that the pipes are sequentially connected in the same manner as described above. 2. The temporary connection of pipes according to claim 1, wherein the continuous pipe is advanced by the pressing force of the contact metal, and the continuous pipe is processed in front of the pressing direction by the pressing force. Method. 3. The temporary pipe connection method according to claim 2, wherein the processing is a bending processing for continuously bending the continuous pipe. 4. A pipe temporary connecting apparatus for temporarily connecting a front end face of a second pipe to a rear end face of a first pipe and temporarily connecting pipes sequentially to form a continuous pipe. The apparatus comprises a metal plate having an uneven shape for forming an uneven surface on the rear end surface of each pipe, a pressing means for pressing the metal plate on the rear end surface of each pipe, and A temporary connection device for a pipe, comprising: a contact moving means for moving the contact. 5. The temporary connection device according to claim 4, wherein:
A temporary pipe connection device comprising a pipe processing device for processing the continuous pipe by a pressing force of the pressing means. 6. The temporary pipe connection device according to claim 5, wherein the pipe processing device is a bending device for continuously bending the continuous pipe.