JP2656656B2 - Laser processing device, alignment device used for the same, and processing head - Google Patents

Description

The present invention relates to a laser processing apparatus, an alignment apparatus used for the same, and a processing head, and is formed in a tubular shape, for example, as a bus bar of a gas insulated switchgear. TECHNICAL FIELD The present invention relates to a laser processing apparatus suitable for cutting an end face of a container or welding a flange to an end of the container with a laser beam, an alignment apparatus used therefor, and a processing head.

[Conventional technology]

For example, Japanese Patent Application Laid-Open No. Sho 60-227987 discloses a laser processing machine that uses a laser beam from a laser oscillator to cut and weld a workpiece.

In this method, a processing head for welding, a processing head for cutting, and a processing head for heat treatment are sequentially placed on a processing table. The laser is installed so that it can move in the same direction. In addition, the welding processing head and the cutting processing head on the processing table are configured to be movable in a direction perpendicular to the output direction of the laser beam.

Then, the welding head or the welding head and the cutting head are moved in the direction perpendicular to the laser beam output direction according to the processing application of the workpiece, and the laser beam is incident on the processing head to be actually processed. The workpiece is moved so that the workpiece is positioned just below the processing head to be processed.

[Problems to be solved by the invention]

In the above prior art, since each processing head is independently fixed on a processing table, the processing head must be moved each time according to the processing application of the workpiece, and Must be positioned directly below the processing head according to the processing application, and there is a problem in workability. Also, if the workpiece is small, it is not necessary to make the spacing between the processing heads so large, but if the workpiece is large, the spacing between the processing heads must be large, As a result, there is a disadvantage that the entire apparatus is increased in size. Further, when performing predetermined processing by returning the processing head once moved, the optical axis of the laser beam from the laser oscillator and the center of the bend mirror provided on the processing head and changing the path of the laser beam are aligned. It is necessary to perform positioning, but it is difficult to perform the positioning, and the moving processing head must be positioned each time processing is performed. Moreover, in the prior art, like the bus of the gas insulated switchgear, no consideration is given to cutting of the end surface of the tubular container or welding of a flange to the end surface of the tubular container. The correction of the gap between the pipe end and the groove of the flange, which always occurs, is not considered at all.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to cut the end of a body tube and butt-weld the flange with a flange, to correct a gap between the end of the body tube and a flange groove portion, and to adjust a gap. Laser processing device that continuously performs by opening the laser beam after making the difference correction, even if the flange is welded to the end of the body tube, the gap generated between the body tube end and the flange groove, Another object of the present invention is to provide a positioning device and a processing head which can easily correct misalignment.

[Means for solving the problem]

In the present invention, in order to achieve the above object, a transport device for transporting a body tube having a flange combined with an end, a laser oscillator for oscillating a laser beam, and a beam for guiding a laser beam output from the laser oscillator A guide, a head configured to be movable, and a head for irradiating the laser beam guided by the beam guide to process the body tube, and a body tube combined with the flange sent by the transport device. A positioning device for supporting the body tube at the time of reaching the position of the head and performing positioning of a butt welding portion between the flange portion and the body tube, wherein the positioning device includes a body tube to be welded; A width-adjusting mechanism that corrects the axial gap of the body tube at the abutting portion with the flange, a tube expanding mechanism that corrects the difference in the body tube radial direction at the abutting portion of the body tube and the flange, and a state expanded by the tube expanding mechanism. A laser processing apparatus comprising: a rotation mechanism for rotating the body tube; a width shifting motor installed on a fixed base; a moving base drive shaft connected to an output shaft of the width shifting motor; and the moving base. A transfer base movably supported above the drive shaft, a pipe expansion cylinder supported on one end of the transfer base via a bracket, and one end of the pipe expansion cylinder via a cylinder rod and a coupling; A spline shaft connected thereto, a tapered rod fixed to the other end of the spline shaft, a plurality of expanded cores radially arranged on a side inclined surface of the tapered rod via a slide guide, and A support base fixed to the other end and supporting the spline shaft, a rotation guide rotatably supported by the support base via a bearing, and an end of the rotation guide A pressurizing face plate connected to a flange joined to an end of the body tube to be corrected, a support guide for supporting the expanded core from the longitudinal direction of the body tube, and a drive motor for rotating and driving the spline shaft. A positioning device, a substantially cylindrical nozzle for guiding a laser beam from a laser oscillator in the vicinity of the workpiece, and a laser beam arranged on the nozzle and converging the laser beam onto the workpiece. A condenser lens for irradiating, a shielding gas introduction means for introducing a shielding gas that passes through the nozzle and is sprayed onto the workpiece, and is disposed on an outer periphery of the nozzle, and is vertically moved by using the outer wall surface of the nozzle as a guide. A processing head, wherein the tip of the nozzle changes in diameter as the guide moves up and down, and a branch pipe is fixed at a predetermined location in advance. A first transport device for transporting the extracted body tube, a cutting station for cutting each pipe end of the body tube with a branch pipe transported by the transport device using a laser beam, and the first transport device A flange assembling station for assembling the flanges conveyed by the second conveying device, which is located substantially perpendicular to the first conveying device, at each pipe end of the trunk pipe with the branch pipe conveyed by
A laser processing apparatus comprising a welding station for welding and joining, by a laser beam, an assembling portion of each of the pipe ends of the trunk pipe with a branch pipe transported by the first transport apparatus and the flange.

[Action]

In the laser processing apparatus of the present invention, when the workpiece conveyed on the transport device comes to a predetermined position and is irradiated with a laser beam to perform predetermined processing, for example, welding, cutting, or the like, The welding or cutting can be continuously performed at the same position simply by switching, selecting, or rotating a plurality of processing heads according to the processing application of the workpiece without moving the workpiece. In the case of a trunk pipe with a branch pipe, the pipe end is cut with a laser beam before mounting the flange, and then the flange is mounted and the joint is welded with a laser beam, so machining after welding is unnecessary. And a continuous processing operation can be performed.

Further, in the positioning device of the present invention, the axial gap of the butt portion of the tubular members to be welded by the width shifting mechanism is corrected, and the radial difference of the butt portion of the tubular members by the expanding device is corrected. Since the tubular member expanded by the pipe expanding device can be rotated by a rotating noble line, the axial gap and misalignment of the butt portion can be reliably corrected, and reliable laser beam welding can be performed.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 shows one embodiment of the laser processing apparatus of the present invention.
1 shows a system configuration in which a laser beam is used for welding and joining a body tube such as a bus bar and a flange to a flange in a gas insulated switchgear and drilling a body tube.

In the figure, reference numeral 1 denotes a transport rail,
First transport line is formed by moving on the transporting carriage 2, the middle of the first conveying line in the direction indicated by the arrow x ₁ equipped with a cylinder tube 3 as a workpiece on the conveyance carriage 2 The body tube 3 is conveyed to this position. 4 on both sides of the first transport line,
It disposed substantially perpendicular to the conveying line of the first, a conveyor for conveying the flange 5 to be joined to both ends of the body tube 3 in the direction of the arrow x _1, y _2, with the conveyor 4 second
Is formed. Numeral 6 is arranged so as to sandwich the transport rail 1 from both sides. When the body tube 3 carried by the carrier 2 comes to a predetermined position, the body tube 3 is carried on the conveyor 4 and changes the direction of the flange 5 to change the body tube 3. This is a flange assembling apparatus for assembling the flanges 5 on both sides of the flange. Cylinder tube 3 which the flange 5 is assembled in the flange assembling apparatus 6, the transport vehicle 2 on the transport rail 1 is conveyed in the arrow x ₂ direction, the process proceeds to the next step. 7 is placed in the middle of the transfer rail 1, as well as rotatably supporting the cylinder tube 3 which the flange 5 is assembled, which has been conveyed in the x ₂ direction, the flange 5 and the cylinder 3
This is a positioning device that corrects the gap in the trunk tube axial direction at the butting portion and the misalignment in the trunk tube radial direction. Reference numeral 8 denotes a rotary processing device that performs welding and bonding of the flanged body tube 3 supported by the positioning device 7 to the flange 5 and drilling of the body tube 3 using a laser beam.
8a and the machining head 8b for cutting are rotatably arranged. The rotary processing device 8 is supported by a suspension device 9 and x
It is possible to move in the direction and the y direction. The processing head 8a for welding and the processing head 8b for cutting are in the z direction (vertical direction).
And is connected to a laser oscillator 11 via a beam guide 10. Reference numeral 12 denotes a control device that controls the entire system.

Next, details of the rotary processing device 8 will be described with reference to FIGS. 2 and 3. FIG.

As shown in the figure, the rotary processing apparatus 8 has a plurality of welding and cutting processing heads 8a to 8d arranged at a predetermined interval at an end on a rotary disk 13 and on a concentric circle with a rotary shaft 14. The rotating disk 13 is driven to rotate by a drive motor 15. The drive motor 15 is fixed to a vertical movement base 16, and a nut 17 provided at one end of the vertical movement base 16 is connected to a screw shaft 18 and is connected to the screw shaft 18. , The entire apparatus can be moved in the vertical direction (z direction). Reference numeral 20 denotes a dustproof cover attached to the vertical movement base 16, and as shown in FIG. 3, the dustproof cover 20 covers the optical system 21 of the processing head that is not used for processing so that dust and the like do not adhere. Is what you do. The optical system 21 is rotated by a rotating disk so that the optical axis of the laser beam 22 when the laser beam 22 emitted horizontally from the laser oscillator 11 is redirected downward by the bend mirror 23 coincides with the optical axis of the laser beam 22. 13 is installed on.

Next, details of the positioning device 7 will be described with reference to FIG. 4, FIG. 5, and FIG.

FIG. 6 shows a joint portion of the body tube 3 and the flange 5 at the time of butt welding. Usually, at the time of butt welding, a gap g in the width direction and a difference δ in the outer diameter occur, and laser beam welding is performed. In these cases, these allowable values are g ≦ 0.3 mm and δ = 0.5 mm, and a positioning device is used to perform positioning within these allowable values.

4 and 5, a width shifting motor 32 is provided on the upper surface of the fixed base 31, and a motor output shaft of the width shifting motor 32 is connected to a width shifting drive screw shaft 33, and the width shifting drive screw is provided. A moving base 35 is a guide rail above the shaft 33
Supported by 34. On one end of the transfer base 35,
The pipe expansion cylinder 37 is supported and mounted on the bracket 36. A hydraulic motor 37a is connected to the pipe expansion cylinder 37 via a hydraulic solenoid valve 37b. Then, the cylinder rod 38 of the pipe expansion cylinder 37 and the spline shaft 40
Are connected via a coupling 39, and the cylinder rod 38 and the spline shaft 40 are arranged concentrically.
Reference numeral 42 denotes a pipe rotation motor. A gear 43 is fixed to the output shaft and meshes with a gear of a spline bearing 41 that transmits rotation and slide.

On the other hand, in front of the moving base 35, a support base 44 for supporting a pipe expansion spline shaft is fixed,
A rotation guide 46 is connected via 45. The end of the rotation guide 46 has a flange 5 welded to the body tube 3.
The pressurizing face plate 46a which is in contact with the end face of the tube and the support guide 47 which supports the expanded core 48 are connected. Further, a tapered rod 49 is fixed to the tip of the spline shaft 40, and a tube expansion core 48 is supported on a side inclined surface of the tapered rod 49 via a slide guide 54.

A flange receiving roller 52 for receiving the flange 5 and a body tube receiving roller 53 for receiving the body tube 3 are fixed to the end of the fixed base 31.

Next, the positioning operation of the positioning device having the above configuration will be described.

First, when the hydraulic expansion valve 37b is operated to retract the expanding cylinder 37, the taper rod 49 is retracted, and the expanding core 48 expands. On the other hand, when the pipe expansion cylinder 37 is advanced, the pipe expansion core 48 contracts radially from the central axis. When the rotary motor 42 rotates in the θ direction, the spline shaft 40 rotates via the gear 43 and the spline bearing 41, and the rotation is transmitted to the taper rod 49 in the same manner. Tube expansion cylinder 37
Since the cylinder rod 38 and the spline shaft 40 are connected by a coupling 39 having a built-in bearing, the rotation operation is interrupted here.

Further, the driving screw shaft 33 is rotated by rotating the width shifting motor 32 on the fixed base 31, and the moving base 35 is supported by the slide rail 34, and the moving base 35 is
In the x direction, and the flange contact face plate 46a
Perform the width adjustment operation. Here, each receiving roller 5
The expanded tube cylinder 37 in a contracted state is inserted from the end of the body tube 3 and the flange 5 supported by the pipes 2, 53,
When the tube 37 is moved forward and comes into contact with the inside diameter of the body tube, the tube expansion is temporarily stopped, and the width moving motor 32 is rotated to move the moving base 35 forward, whereby the width of the body tube 3 and the flange 5 are moved. Thereafter, the pipe expansion cylinder 37 is further advanced to perform pipe expansion. When the difference between the flange 5 and the body pipe 3 falls within an allowable value, the pipe expansion is stopped and held. Next, after the rotation motor 42 is rotated to rotate the body tube 3 and the flange 5 integrally, welding is performed by irradiating a laser beam from the welding processing head 8a located above.

Next, the operation of the laser processing apparatus of this embodiment will be described with reference to FIG.

This apparatus is used for welding a body tube and a flange forming a bus bar or the like used in a gas insulated switchgear, or for processing a pilot hole for branching to the body tube. FIG. 7 (a),
As shown in (b) and (c), the bus bar and the like are usually machined to form the trunk tube 3 and the flange 5 and then joined together. Thereafter, a pilot hole for a branch tube is formed in the trunk tube 3. Using the present apparatus, these processes are continuously performed with a laser beam.

First, cylinder tube 3 is fed from the mounting has been x ₁ direction conveyance carriage 2 is stopped positioned at the center of the flange assembling apparatus 6. At this time, the table surface of the flange assembling device 6 is facing upward, and the flange 5 conveyed from the flange conveyor 4 is gripped by the table surface of the flange assembling device, and then the two tubes sandwich the body tube 3 therebetween. Turn 90 ° to attach the body tube 3 and the flange 5. The assembled body tube 3 and flange 5 are conveyed by the carrier 2 to a position directly below the welding head 8a, and are positioned at the center position of a positioning device 7 for expanding, shifting, and rotating. The pipe expansion heads are inserted from both side surfaces of the flange 5 by the positioning device 7, and after expanding and positioning to a predetermined size, the butt welding of the body tube 3 and the flange 5 is performed by a laser beam from the welding processing head 8a. After the welding of both ends of the body tube 3 is completed, the laser beam is moved from the welding processing head to the cutting processing head 8b.
And the prepared hole of the body tube 3 is formed. The flanged body tube with the prepared hole is mounted again on the transport trolley 7 and transported to the next step.

According to the present embodiment described variously, in the production of a tubular container having a body tube and a flange, such as a bus bar of a gas insulated switchgear, the transfer, positioning, rotation, and expansion of the workpiece are consistently automated. It is possible to reduce the cost significantly, and one laser oscillator can be switched between welding and drilling, so that a tubular container with less thermal deformation can be manufactured in the tubular container can-making operation.

Further, according to the processing apparatus of the present embodiment, a plurality of processing heads are arranged in a circumferential shape concentric with the rotation center of the rotating disk,
By securely fixing the base of the rotary drive system,
During indexing rotation, the optical axis of the laser beam reflected from the bend mirror can be aligned with the optical axis of the optical system of the processing head, so that the laser beam does not defocus and is placed on the top of the unused processing head. Since the dustproof cover is provided, the optical system has a dustproof effect, and no abnormality occurs during beam focusing.

Further, according to the positioning device of the present embodiment, the expanded core extending from the inside of the body tube is uniformly moved in the radial direction of the tube due to the lateral movement of the tapered rod, so that the deformed tube can be trued. Can be modified to a circle. In addition, if a pilot check valve is provided in the hydraulic cylinder and its hydraulic circuit in the lateral drive source of the tapered rod, the expanded dimensions can be maintained in that state, and the dimensions do not change during welding. Even if a hydraulic motor is used as the width-shift drive source and pressure is applied in a state where the groove portions of the pipes are aligned, the motor will not be damaged if the relief valve of the hydraulic circuit is used.

Next, another embodiment of the processing head used in this apparatus will be described with reference to FIGS. 8, 9, 10, and 11. FIG.

As shown in the figure, in the present embodiment, a nozzle 52 capable of changing the diameter of a nozzle for blowing a shield gas on the lower surface of a base 51 supporting a processing head, and a guide 53 for adjusting a system of the nozzle 52 are provided. A condensing lens 54 is provided inside a nozzle 52 that can change the position of the guide 53.
Is connected to an air cylinder 55 that moves the cylinder up and down.

The nozzle body 56 above the nozzle 52 has a shield gas inlet 57, and the shield gas inlet 57
A three-way solenoid valve 58 for switching the gas is disposed in front of the valve.

Next, the operation will be described. The direction of the laser beam 22 from the laser oscillator is changed by the bend mirror 23 and is introduced into the condenser lens 54 of the processing head. As shown in FIG. 9, the tip of the variable-diameter nozzle 52 is divided, and at the lower limit position of the air cylinder 55, the guide 53 is also at the lower limit position. become of φd _o. When the air cylinder 55 is moved to the upper limit position, the guide 53 reduces the opening of the nozzle 52,
As Figure 11, the minimum opening condition .phi.d _s. Further, in the maximum opening state, for example, by opening one of the inlet sides of the three-way solenoid valve 58, O ₂ gas can be introduced into the nozzle 52, for example. Conversely, in the minimum opening state, the other side of the three-way solenoid valve 58 can be opened to introduce Ar gas.

As described above, the nozzle diameter of the processing head
Or cutting), and by switching the type of gas to be blown, operations such as laser cutting and welding can be performed with one head. Further, by introducing the laser processing apparatus, a laser combined processing apparatus can be realized.

 Next, another embodiment of the laser processing apparatus will be described.

Most of the buses and the like in the gas insulated switchgear are connected to a branch pipe in addition to the above-mentioned flange, and this apparatus is used when cutting and flange welding of a pipe end face with a branch pipe are performed by a laser beam.

First, the outline of the working process will be described with reference to FIG. The branch pipe 3a connected in advance to the body pipe 3 by arc welding or the like (No.
12 (a), the tube end face is cut using a laser beam as shown in FIG. 12 (b), and then, as shown in FIG. 12 (c), the end of the body tube 3, Then, flanges 5, 5a are assembled to the ends of the branch pipes 3a, and then, as shown in FIG. 12 (d), the flanges 5, 5a are welded to the pipes 3, 3a by a laser beam.

Next, an apparatus for performing the above operation steps will be described with reference to FIG.

There is a cutting station where a body tube 3 to which a branch tube 3a is previously joined by arc welding or the like is transferred by a transfer carriage 2 on a transfer rail 1. This cutting station
A rotary table 60 on which the body tube 3 with a branch pipe is placed and which is movable in the y direction and rotates in the α direction;
And a turning table 62 having a cutting processing head 61 and turning in the θ direction. And the trunk pipe 3 or the branch pipe
The rotary table 60 is rotated so that the end of 3a comes to the cutting position, and when the body tube 3 or the branch tube 3a comes to the cutting position, the turning table 62 is turned while irradiating a laser beam from the cutting processing head 61. This is for cutting the pipe end. When the cutting of both ends of the body tube 3 and the end of the branch tube 3a is completed, the body tube 3 is conveyed to a flange assembly station in the next step. The configuration of the flange assembling station is almost the same as that of the flange assembling apparatus described with reference to FIG. 1, and a description thereof will be omitted. The body pipe having the flanges 5 mounted on both ends of the body pipe 3 and the ends of the branch pipe 3a at this flange mounting station is conveyed to the welding station in the next step.

In this case, if the trunk pipe 3 and the branch pipe 3a have the same diameter, they can be assembled to each other by using the flanges 5 on both conveyors. If it is smaller, it can be assembled by mounting a flange corresponding to the diameter of the trunk pipe 3 on one conveyor and mounting a flange corresponding to the diameter of the branch pipe 3a on the other conveyor. The welding station has substantially the same configuration as the cutting station, except that a welding processing head 63 is provided on the swivel table 62 instead of the cutting processing head. And the trunk pipe 3 or the branch pipe and the flange
5, 5a are welded by turning the turning table 62 while irradiating the laser beam from the laser oscillator 11 from the welding processing head 63.

According to the present embodiment described above, since machining can be performed in units of members, the flange can be attached without considering thermal deformation such as arc welding, and large machining after laser welding is not required, so that large machining can be performed. Cost reduction can be achieved.
In addition, it becomes possible to commercialize a combined machining apparatus using a laser.

In the above-described embodiment, the laser oscillator is provided for each of the cutting station and the welding station. However, one laser oscillator may be used for both.

〔The invention's effect〕

According to the laser processing apparatus of the present invention described above, the positioning apparatus used therein, and the processing head, a transport apparatus that transports a body tube having a flange combined with an end, and a laser beam are oscillated. A laser oscillator, a beam guide for guiding a laser beam output from the laser oscillator, a head configured to be movable, and irradiating a laser beam guided by the beam guide to process the body tube; A positioning device that supports the body tube when the body tube combined with the flange sent by the transfer device reaches the position of the head and aligns a butt weld portion between the flange portion and the body tube. A positioning mechanism that corrects an axial gap of a butt portion between a body tube and a flange to be welded, and a body of a butt portion between the body tube and the flange. A laser processing apparatus comprising: a pipe expanding mechanism for correcting misalignment in the pipe diameter direction; and a rotating mechanism for rotating the body pipe in a state where the pipe is expanded by the pipe expanding mechanism; a width moving motor installed on a fixed base; A movement base drive shaft connected to the output shaft of the shift motor, a movement base movably supported above the movement base drive shaft, and supported at one end on the movement base via a bracket. A pipe expansion cylinder, a spline shaft having one end connected to the cylinder rod of the pipe expansion cylinder via a coupling, a taper rod fixed to the other end of the spline shaft, and a slide on a side inclined surface of the taper rod. A plurality of expanded cores radially arranged via a guide, a support base fixed to the other end of the moving base and supporting the spline shaft, and a bearing mounted on the support base A rotary guide rotatably supported via a rotary guide, a pressurizing face plate connected to an end of the rotary guide and in contact with an end face of a flange joined to an end of the body pipe to be corrected, and An alignment device including a support guide for supporting the spline shaft in a longitudinal direction of the tube and a drive motor for rotating the spline shaft; a substantially cylindrical nozzle for guiding a laser beam from a laser oscillator near a workpiece; A condensing lens that is disposed in the middle of the nozzle and condenses the laser beam and irradiates the workpiece onto the workpiece, and introduces a shielding gas that passes through the nozzle and is sprayed onto the workpiece. A shield gas introducing means, and a guide disposed on the outer periphery of the nozzle and moving up and down by using the outer wall surface of the nozzle as a guide. A first transfer device for transferring a body pipe having a branch pipe fixed at a predetermined location in advance, and each pipe end of the body pipe with a branch pipe transferred by the transfer apparatus. A cutting station for cutting the laser beam using a laser beam, and a second station located substantially perpendicularly to the first transport device at each end of the body tube with a branch pipe transported by the first transport device. A flange assembly station for assembling each of the flanges transported by the transport device of
This is a laser processing apparatus provided with a welding station for welding and joining, by a laser beam, an assembling portion between each pipe end of the main pipe with a branch pipe and the flange conveyed by the first conveying apparatus with a laser beam. A laser that can be continuously cut using a laser beam after cutting the body tube end and butt-welding with the flange after correcting the gap and misalignment between the tube end and the flange groove. Obtain a processing device, a positioning device, and a processing head that can easily correct a gap or misalignment generated between a pipe end and a flange groove even when a flange is welded to an end of a body tube. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the overall configuration of the laser processing apparatus of the present invention, FIG. 2 is a front view showing a processing apparatus used for the same, FIG. 3 is a plan view of FIG. FIG. 5 is a cross-sectional view showing an alignment device used in the apparatus of the present embodiment, FIG. 5 is a side view of FIG. 4 viewed from the P direction, and FIG. 6 shows details of a butt portion between a body tube and a flange. FIG. 7 is a process diagram showing a process of attaching a body tube and a flange, FIG. 8 is a diagram showing an embodiment of a machining head, and a sectional view in the case of a large diameter, and FIG. , FIG. 10 is a cross-sectional view in the case of a small diameter in FIG. 8, FIG. 11 is a view as viewed from the BB direction, and FIG. 12 is a case in which a flange is attached to a trunk pipe with a branch pipe. FIG. 13 is a process diagram showing working steps, and FIG. 13 is an overall perspective view showing another embodiment of the laser processing apparatus of the present invention. 1 ... conveyor rail, 2 ... conveyor truck, 3 ... body tube, 3a ...
... Branch pipe, 4 ... Conveyor, 5,5a ... Flange, 6 ...
Flange assembling device, 7 Positioning device, 8 Rotary processing device, 8a Processing head for welding, 8b Processing head for cutting, 9 Hanging device, 10 Beam guide, 11 …
Laser oscillator, 20 dust cover, 21 optical system, 22
... Laser beam, 23 ... Vent mirror, 52 ... Nozzle,
60 ... Rotating table, 61 ... Cutting head, 62 ...
Swivel table, 63 …… Working head for welding, …… Cutting station, …… Flange assembly station, ……
Welding station.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyozo Nakano 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Hitachi, Ltd. Kokubu Plant (72) Inventor Takashi Sato 4-6-6 Kanda Surugadai, Chiyoda-ku, Tokyo Address Hitachi, Ltd. (72) Inventor Osamu Matsushima 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Kokubu Plant, Hitachi, Ltd. (72) Koji Goto 1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture 1 Kokubu Plant, Hitachi, Ltd. (72) Inventor Masaki Murashita 1-1-1, Kokubuncho, Hitachi, Hitachi, Ibaraki Prefecture Kokubu Plant, Hitachi, Ltd. (72) Takashi Sato Inventor, Takashi Kokubu, Hitachi, Ibaraki 1-1-1 cho, Kokubu Plant, Hitachi, Ltd. (56) References JP-A-60-72694 (JP, A) JP-A-63-108992 (JP, A) JP-A-1-258886 (JP, A) JP-A-63-138989 (JP, U) JP-A-61-195885 (JP, U) JP-A-63-41383 (JP, U)

Claims (11)

(57) [Claims] 1. A conveying device for conveying a body tube having a flange combined at an end, a laser oscillator for oscillating a laser beam, a beam guide for guiding a laser beam output from the laser oscillator, and a movable member. A head configured to irradiate a laser beam guided by the beam guide to process the body tube, and a body tube combined with the flange sent by the transfer device are positioned at the position of the head. And a positioning device for supporting the body tube at the point of time and performing positioning of a butt welding portion between the flange portion and the body tube, wherein the positioning device includes a butt portion between the body tube to be welded and the flange. A width shifting mechanism that corrects the axial gap in the body tube,
Laser processing comprising: a pipe expansion mechanism for correcting a difference in diameter of the abutting portion between the body pipe and the flange in the body pipe radial direction; and a rotating mechanism for rotating the body pipe in a state where the pipe is expanded by the pipe expansion mechanism. apparatus. 2. A first transfer line for transferring a body tube, a second transfer line substantially orthogonal to the first transfer line, and transferring a flange combined with an end of the body tube; First
Is installed in the middle of the transfer line, and a second
A flange assembling device that combines the flanges that have been transported on the transport line, a laser oscillator that oscillates a laser beam, and a beam guide that guides a laser beam output from the laser oscillator, are configured to be movable, A laser beam guided by the beam guide is irradiated with a head for processing the body tube, and a body tube in which the flanges conveyed on the first conveyance line are combined,
A positioning device for supporting the body tube at the time of reaching the position of the head and performing positioning of a butt welding portion between the flange portion and the body tube, wherein the positioning device comprises a body tube to be welded and a flange. A width shifting mechanism for correcting the axial gap of the body tube at the abutting portion;
Laser processing comprising: a pipe expansion mechanism for correcting a difference in diameter of the abutting portion between the body pipe and the flange in the body pipe radial direction; and a rotating mechanism for rotating the body pipe in a state where the pipe is expanded by the pipe expansion mechanism. apparatus. 3. A width shifting motor installed on a fixed base, a moving base drive shaft connected to an output shaft of the width shifting motor, and movably supported above the moving base drive shaft. A moving base, a pipe expanding cylinder supported at one end on the moving base via a bracket, a spline shaft connected at one end to a cylinder rod of the pipe expanding cylinder via a coupling, and the spline shaft. A tapered rod fixed to the other end of the tapered rod, a plurality of expanded cores radially arranged on a side inclined surface of the tapered rod via a slide guide, and fixed to the other end of the moving base to support the spline shaft. A supporting base, a rotating guide rotatably supported on the supporting base via a bearing, and a flange connected to an end of the rotating guide and joined to an end of a body tube to be corrected. Pressing surface plate in contact with the end face of the di-, and a support guide for supporting said tube expanding core from Dokan longitudinally alignment apparatus, characterized in that a drive motor for rotationally driving the spline shaft. 4. A substantially cylindrical nozzle for guiding a laser beam from a laser oscillator in the vicinity of a workpiece, and disposed in the middle of the nozzle to focus the laser beam and irradiate the laser beam onto the workpiece. A condenser lens that passes through the nozzle, a shield gas introduction unit that introduces a shield gas that is blown onto the workpiece, and a shield gas introduction unit that is disposed on the outer periphery of the nozzle and moves up and down with the outer wall surface of the nozzle as a guide. A processing head, wherein the nozzle has a tip portion whose diameter changes as the guide moves up and down. 5. The processing head according to claim 4, wherein said shield gas introducing means includes a switching mechanism for switching the introduced shield gas. 6. The processing head according to claim 4, wherein said guide includes a vertical drive mechanism for vertically moving said guide. 7. A first transport device for transporting a trunk pipe having a branch pipe previously fixed at a predetermined location, and each pipe end of the trunk pipe with a branch pipe transported by the transport apparatus is separated by using a laser beam. A cutting station for cutting, and a second transfer device located at a substantially right angle to the first transfer device at each pipe end of the branch pipe with a branch pipe transferred by the first transfer device. A flange assembling station for assembling each of the flanges, a welding station for welding and joining, with a laser beam, an assembling portion between each of the pipe ends of the trunk pipe with a branch pipe and the flange which has been conveyed by the first conveying device. A laser processing apparatus comprising: 8. The cutting station according to claim 1, wherein the cutting station has a rail disposed substantially orthogonal to a transport direction of the first transport device, and a rail on the rail which is orthogonal to the transport direction of the first transport device. A rotary table movable in a horizontal direction and rotatable in a horizontal direction, and a pivot axis substantially coincident with a pipe center of a body pipe with a branch pipe to be cut on the rotary table. And a cutting head for irradiating a laser beam from a laser oscillator to turn in a direction orthogonal to the rotation direction of the turntable and to cut each pipe end of the trunk pipe with a branch pipe. The laser processing apparatus according to claim 7, further comprising a turning table. 9. The welding station according to claim 1, wherein the welding station has a rail disposed substantially orthogonal to a transport direction of the first transport device, and a rail on the rail is orthogonal to the transport direction of the first transport device. A rotary table that is movable in the horizontal direction and that can be rotated in the horizontal direction, and a turning axis that substantially coincides with the center of the pipe of the trunk pipe with the branch pipe in which the flange to be welded on the rotary table is combined, A laser beam is radiated from a laser oscillator to rotate around the rotation axis in a direction orthogonal to the rotation direction of the rotary table and to weld and join each pipe end of the main pipe with a branch pipe to a flange. 8. A laser processing apparatus according to claim 7, further comprising a turning table having a welding processing head to be rotated. 10. A laser oscillator for outputting a laser beam directed to the cutting station and the welding station,
The laser processing apparatus according to claim 7, wherein the laser processing apparatus is provided independently for each station. 11. A laser oscillator for outputting a laser beam directed to the cutting station and the welding station,
The laser processing apparatus according to claim 7, wherein one laser processing apparatus is installed so as to be shared by each station.