JPH11138287A - Pipe machining method and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe machining method and its device capable of machining the whole zone of a pipe to be machined by a laser beam. SOLUTION: One end of the pipe P to be machined is chucked with a first tail jig 7 provided in an indexing device 5, the other end of the pipe P is chucked with a second rotatable tail jig 13 while pressurizing, next a laser machining head 25 is transferred in the longitudinal direction of the pipe P in a state that the pipe is rotationally indexed at a desired position with the indexing device 5 and the pipe P is irradiated with the laser beam from the laser machining head 25. Whereby, laser beam machining is executed for the pipe P.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe processing method and apparatus for performing laser processing such as drilling and slitting on a pipe.

[0002]

2. Description of the Related Art Conventionally, it has been known that pipe processing by a two-dimensional laser is usually performed by chucking the pipe on a chuck such as a lathe and rotating the pipe. That is, as shown in FIG. 4, one end of a pipe P to be processed is chucked by a rotatable chuck 103 provided in the index device 101, and the index device 101 is driven so that the pipe P passes through the chuck 103. P rotates and is indexed. By irradiating the laser beam from the laser processing head 105 to the indexed pipe P and moving the laser processing head 105 rightward in FIG.
Then, laser processing such as desired drilling and slit processing is performed.

[0003]

However, in the above-mentioned conventional pipe processing apparatus, there is a problem that the laser processing cannot be performed at the place where the pipe P is chucked or at the periphery thereof.

[0004] It is an object of the present invention to provide a pipe processing method and apparatus for performing laser processing on the entire area of a pipe to be processed.

[0005]

According to a first aspect of the present invention, there is provided a pipe machining method according to the present invention, wherein one end of a pipe to be machined is provided on an index device.
While chucking with a tailing jig and chucking while pressing the other end of the pipe with a rotatable second core pushing jig, and then rotating and indexing the pipe to a desired position by the indexing device, The laser processing is performed on the pipe by moving the laser processing head in the longitudinal direction of the pipe and irradiating a laser beam from the laser processing head toward the pipe.

According to a second aspect of the present invention, there is provided a pipe processing apparatus comprising a first indexing jig for chucking one end of a pipe to be processed, and an indexing apparatus for chucking the other end of the pipe. A rotatable second core pressing jig, pressing means for pressing the second core pressing jig toward one end of the pipe, and a laser provided above the pipe and movable in a longitudinal direction of the pipe And a processing head.

Therefore, in the pipe processing method and the pipe processing apparatus according to the present invention according to the first and second aspects, one end of the pipe to be processed is chucked by the first core pushing jig provided in the index device, and the other end of the pipe is processed. A second core pushing jig having a rotatable end is pressed against one end of the pipe by a pressing means to cause chucking.

When the index device is driven in this state, the pipe is rotated while being supported by the first and second core pushing jigs, is indexed to a desired position, and the laser processing head provided above the pipe is rotated. By moving the pipe in the longitudinal direction, laser processing such as drilling and slit processing is performed up to both ends in the longitudinal direction of the pipe, that is, the entire area of the pipe.

According to a third aspect of the present invention, in the pipe processing apparatus according to the second aspect, the first and second core pushing jigs each include a main body shaft, and a circumference having a tip of the main body shaft as a fulcrum. A plurality of chucking members that are provided at appropriate intervals in the direction and extend in the direction of the main body shaft and that can be expanded and contracted.

Therefore, the chucking members of the first and second core pushing jigs are enlarged and reduced according to the size of the pipe, and
It is easily chucked to any size pipe.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, the pipe processing apparatus 1 includes upright frames 3R and 3L, on which a well-known index device 5 is provided. A rotatable first core pushing jig 7 is provided on the right side of the index device 5 in FIG.

For example, a fluid cylinder 9 as a pressurizing means is provided on the frame 3R, and a piston rod 11 is mounted on the fluid cylinder 9. A second core pushing jig 13 is provided at the tip of the piston rod 11 (on the left side in FIG. 1).

On the frames 3L and 3R, columns 15 and 17 are provided upright, and the left and right ends of a ball screw 19 extending in the left-right direction in FIG. It is rotatably supported. A drive motor 21 is connected to the right end of the ball screw, for example. A nut member 23 is screwed into the ball screw 19, and a laser processing head 25 that can move up and down is provided on the nut member 23.

According to the above configuration, one end, for example, the left end of the pipe P to be processed is chucked by the first core pushing jig 7 provided in the index device 5. Next, the other end, for example, the right end of the pipe P is chucked by the second centering jig 13 and the fluid cylinder 9 is operated to move the piston rod 11 to the left in FIG. 13 moves to one end side of the pipe P, for example, the left end side, pressurizes the pipe P, and the pipe P
It is fixed by tailing jigs 7 and 13.

In this state, the index device 5 is driven to rotate the first core pushing jig 7, whereby the pipe P rotates and is indexed to a desired position. Then, by irradiating a laser beam from the laser processing head 25 toward the pipe P, laser processing such as drilling and slitting is performed on the pipe P. In addition, when the drive motor 21 is driven to rotate the ball screw 19, the laser processing head 25 is moved from the position indicated by the solid line to the position indicated by the two-dot chain line in FIG. Can be laser-processed from the left end to the right end of the other end, that is, the entire region in the longitudinal direction of the pipe P.

The first and second core pushing jigs 7 and 13 are, for example, as shown in FIGS.
7 and a plurality of chucking members 29A to 29D are integrated at appropriate intervals, for example, at 90 ° intervals in the circumferential direction with the tip of the main body shaft 27 as a fulcrum. Moreover, each of the chucking members 29A to 29D is attached to the main body shaft 2.
7, and is expanded and contracted according to the size (diameter) of the pipe P. For example, each chucking member 29A-
29D is urged radially outward by a spring 31 so as to contract according to the size of the pipe P. Alternatively, each of the chucking members 29A to 29D may be elastically expanded and contracted like a leaf spring. The point is that any shape can be used. In FIG. 1, the root of the main body shaft 27 of the second core pushing jig 13 is rotatably supported by a bearing 33.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes.

[0019]

As will be understood from the embodiments of the present invention as described above, according to the first and second aspects of the present invention, one end of a pipe to be machined is provided with a first centering jig provided in an index device. Then, a second core pushing jig capable of rotating the other end of the pipe is pressed against one end of the pipe by a pressurizing means and chucked.

When the indexing device is driven in this state, the pipe rotates while being supported by the first and second core pushing jigs, is indexed to a desired position, and the laser processing head provided above the pipe is rotated. By moving the pipe in the longitudinal direction, laser processing such as drilling and slit processing can be performed up to both ends in the longitudinal direction of the pipe, that is, the entire area of the pipe.

According to the third aspect of the present invention, the chucking members of the first and second core pushing jigs are enlarged and reduced according to the size of the pipe, so that the chuck can be easily chucked to any size pipe. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a pipe processing apparatus according to the present invention.

FIG. 2 is a front view of the first and second core pushing jigs.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view of a conventional pipe processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe processing device 5 Index device 7 1st core pushing jig 9 Fluid cylinder (pressurizing means) 13 2nd core pushing jig 25 Laser processing head 27 Main shaft 29A-29D Chucking member 31 Spring

Claims (3)

[Claims] 1. A chuck for chucking one end of a pipe to be processed with a first core pushing jig provided in an indexing device and pressing the other end of the pipe with a rotatable second core pushing jig. Then, while the pipe is rotated and indexed to a desired position by the index device, by moving the laser processing head in the longitudinal direction of the pipe and irradiating a laser beam from the laser processing head toward the pipe, A pipe processing method comprising performing laser processing on a pipe. 2. An indexing device having a first core pushing jig for chucking one end of a pipe to be processed, and a second rotatable chucking and rotating the other end of the pipe.
A tailing jig, a pressing means for pressing the second tailing jig toward one end of the pipe, and a laser processing head provided above the pipe and movable in a longitudinal direction of the pipe. A pipe processing apparatus characterized by being constituted. 3. The first and second core pushing jigs are provided at a proper interval in a circumferential direction with a tip of the main body shaft as a fulcrum and extendable in the direction of the main body shaft. A plurality of chucking members,
3. The pipe processing apparatus according to claim 2, wherein: