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91. 发明专利

JPH02142688A OPTICAL PART HEAT LENS MONITORING METHOD FOR LASER BEAM MACHINE 失效
公开(公告)号：JPH02142688A
公开(公告)日：1990-05-31
申请号：JP29434688
申请日：1988-11-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： KURI SHUHEI , SHIMOKUSU YOSHIAKI , ISHIDE TAKASHI , MEGA MASAHIKO
IPC分类号： B23K26/00 , B23K26/064
摘要： PURPOSE:To prevent adverse influence of a heat lens by monitoring a laser beam on a line from right after oscillation, producing an alarm when a laser beam dia. attains reduction limitation by the generation of the heat lens of a transparent optical part and interrupting machining work. CONSTITUTION:A wire-cut type laser beam intensity distribution detecting device 3 is arranged on a laser beam optical path 1. The detecting device 3 is a device where a wire rotates at the constant speed and a detector receives reflected light from the wire and detects an intensity distribution of the laser beam and consists of only a wire rotation system and a sensor part for the purpose of miniaturizing the device and other parts are collected in a distant control box 4. In case the detecting device 3 is arranged at the upper stream of a condenser lens, it is suitable for monitoring a heat lens phenomenon of an oscillator output aperture and in case the detecting device 3 is arranged at the down stream thereof, it is also suitable for monitoring a heat lens phenomenon of the condenser lens 2 at the same time. By this method, machining is interrupted before the adverse influence of the heat lens of the optical part takes place for machining work and the adverse influence is prevented.

92. 发明专利

JPH0259192A LASER BEAM EQUIPMENT WITH LARGE POWER 失效
公开(公告)号：JPH0259192A
公开(公告)日：1990-02-28
申请号：JP21138488
申请日：1988-08-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIDE TAKASHI
IPC分类号： B23K26/064
摘要： PURPOSE:To obtain a laser beam equipment capable of producing a large power easily and at a low cost by adding up laser beams obtained from plural laser beam oscillators with small power each having different optical axes and reforming them into laser beams having the same optical axis. CONSTITUTION:A wave guide system 30 has plural incident holes 24 of beams these beam paths are concentrated upon one path at the branch point 25 of the wave guide in the central part of the wave guide system to connect with the outgoing hole 26. The laser beams 21 obtained from plural oscillators with small power are injected by reflective mirrors 2 into the wave guide system 30 through the direction of incident holes 24. The beams 21 are condensed by condenser optical systems 23 into the incident holes 24. The original system 23 is composed of a single lens of ZnSe for the CO2 laser beam. The beams 21 condensed at the incident hole 24 repeats multiple reflections in the wave guide 30 and advanced toward the side of the emitting hole 26. Besides, the loss of beam in the wave guide 30 of the beams emitted from the wave guide system 30 is about 15% per one laser beam 21.

93. 发明专利

JPS6427788A LASER BEAM WELDING EQUIPMENT FOR PIPE INSIDE PERIPHERAL SURFACE 失效
公开(公告)号：JPS6427788A
公开(公告)日：1989-01-30
申请号：JP18367087
申请日：1987-07-24
申请人： MITSUBISHI HEAVY IND LTD , SEIRYO ENG
发明人： HAMADA SHOICHI , NAGASHIMA TADASHI , ISHIDE TAKASHI , SAKAMOTO MICHITO , TOMEOKA MASARU
IPC分类号： B23K26/064 , B23K26/142 , B23K26/21 , B23K26/28 , F28F11/06
摘要： PURPOSE:To improve the repairing efficiency of a working pipe by providing a flexible tube which is expanded and fixed on the inside of the working pipe and arranging a rotary cylinder therein and arranging laser beam condensing and reflection optical systems for welding to the inside of the rotary cylinder. CONSTITUTION:The flexible tube 12, a connecting cylinder 14 and an intermediate cylinder 20 are connected and arranged in order at the inside of the working pipe 11 and an air bag 19 is provided to the tip of the intermediate cylinder 20. Further, the rotary cylinder 26 to be driven via a driving motor 23 and gears, 28, 29 and 30 is provided to the tip of the intermediate cylinder 20 and the condensing and reflection optical systems 36 and 37 are arranged therein. In advance, a laser beam irradiation hole 38 and a welding place 35 are positioned via a position detector 13 and the air bag 19 is actuated by compressed air to fix the intermediate cylinder 20 on the pipe 11. The rotary cylinder 26 is rotated and the laser beam 18 is projected to perform the circumferential seal welding of the pipe 11. The welding positioning is facilitated and the repairing efficiency of the working pipe 11 is improved.

94. 发明专利

JPS63264289A LASER BEAM WELDING METHOD 失效
公开(公告)号：JPS63264289A
公开(公告)日：1988-11-01
申请号：JP9627587
申请日：1987-04-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： KURI SHUHEI , SHIMOKUSU YOSHIAKI , ISHIDE TAKASHI , MEGA MASAHIKO
IPC分类号： B23K26/00 , B23K26/03 , B23K26/04
摘要： PURPOSE:To prevent the energy on the surface of a work from changing and to satisfactorily heat the work by detecting the temperature change of a partial reflection mirror and a condensing mirror of a laser beam oscillator and changing the position of the condensing lens or the work according to the temperature variation to maintain a focus of a laser beam constant. CONSTITUTION:The relation between the temperature of the condensing lens 1 and the variation L of the focusing position is investigated and during heating, the temperature of the condensing lens 1 is constantly monitored by a sensor 2 to detect the temperature rise. Then, the position of the work 5 or the position of the condensing lens 1 is changed by for the variation of the focusing position for the temperature. By this method, the distance between the focusing position of the laser beam 4 and the surface of the work 5 can be maintained at a value equal to an initial set value.

95. 发明专利

JPS63137120A APPARATUS FOR HEAT TREATING SURFACE WITH LASER 失效
公开(公告)号：JPS63137120A
公开(公告)日：1988-06-09
申请号：JP28384586
申请日：1986-11-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： KURI SHUHEI , SHIMOKUSU YOSHIAKI , ISHIDE TAKASHI , MEGA MASAHIKO
IPC分类号： B23K26/352 , B23K26/06 , B23K26/073 , C21D1/09
摘要： PURPOSE:To obtain a square heat source having uniform intensity and necessary area for heat treatment of surface, by placing a hollow optical waveguide having the shape of a truncated quadrangular pyramid in the titled apparatus so as to squarely concentrate laser beams. CONSTITUTION:Laser beams 4 are passed through a gold lined optical waveguide 9 made of copper to obtain square beams having uniform intensity and a beam profile shown by the figure. When the square beams are radiated on an object 5 and transferred at a proper rate, the surface of the object 5 can be uniformly heat treated.

96. 发明专利

JPS632564A MONITORING METHOD FOR WELDING CONDITION 失效
公开(公告)号：JPS632564A
公开(公告)日：1988-01-07
申请号：JP14413786
申请日：1986-06-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： IIDA YASUHISA , FUJIWARA MASAHIRO , ISHIDE TAKASHI , TANAKA TAKAMICHI
IPC分类号： B23K9/095 , B23K9/00
摘要： PURPOSE:To visualize all of varioud informations of just under a welding arc and to monitor with automatic recognition by using the composite filter having the maximum values of the specific transmission rate respectively on a piece of filter with its combining with a camera system. CONSTITUTION:The composite filter 13 having the maximum value of the transmission rate respectively is used for 8,500-1,050Angstrom for automatically recognizing the shapes of and electrode and for 5,500-6,500Angstrom for automatically recognizing the other groove shape, wire inserting position and beat shape inside, a piece of a filter, is used. The camera optical system 12 fitted to a camera 11 is formed by an optical diaphragm 16 and adaptor 17. The filter 13 is fitted at the front of a camera 13 and connected to a filter rotating motor 14. The monitoring is performed in the stage of the filter 13 coming into the camera optical axis while under welding by the driving of a motor 14. The automatic recognition by the picture processing is possible and suitable for remote scanning and automatic control.

97. 发明专利

JP2002059286A LASER BEAM MACHINING HEAD AND LASER BEAM MACHINING DEVICE PROVIDED WITH THE SAME 失效
公开(公告)号：JP2002059286A
公开(公告)日：2002-02-26
申请号：JP2000242367
申请日：2000-08-10
申请人： MITSUBISHI HEAVY IND LTD , NIKON CORP
发明人： ISHIDE TAKASHI , HASHIMOTO YOSHIO , WATANABE MASANARI , AKAHA TAKASHI , FUJIE DAIJIRO
IPC分类号： B23K9/16 , B23K26/064 , B23K26/067 , B23K26/21 , B23K26/346 , B23K26/06 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive coaxial laser beam machining head, which is compact and has no possibility of giving a damage to optical equipment, and a laser beam machining device provided with the machining bead. SOLUTION: The head is composed of a group of collimating lenses 26, a first reflection mirror 27 which divides a laser beam into a first divided laser beam and a second divided laser beam, a second reflection mirror 28 which makes a space part 24d between both divided laser beams by further reflecting the first divided laser beam, a group of conversion lenses 29 which converges both divided laser beams onto a part 84a to be welded, and a GMA electrode 33 disposed coaxially with the laser beam in the space. Alternatively, the device is composed of a group of collimating lenses, the first reflection mirror which forms the space in the main body of the laser beam by reflecting a part of the laser beam, the second reflection mirror which further reflects a part of the laser beam, a group of conversion lenses which converges the main body of the laser beam and a part of the laser beam onto the part to be welded, and the GMA electrode disposed coaxially with the laser beam in the space.

98. 发明专利

JP2001108869A HIGH OUTPUT LASER BEAM TRANSMISSION METHOD, ITS DEVICE, AND LASER BEAM MACHINING DEVICE 失效
公开(公告)号：JP2001108869A
公开(公告)日：2001-04-20
申请号：JP28390699
申请日：1999-10-05
申请人： MITSUBISHI HEAVY IND LTD , MITSUBISHI CABLE IND LTD
发明人： AKAHA TAKASHI , ISHIDE TAKASHI , HASHIMOTO YOSHIO , SATAKE TAKESHI , KIMURA YUKITSUGU
IPC分类号： B23K26/064 , G02B6/42 , B23K26/08
摘要： PROBLEM TO BE SOLVED: To reduce the influence of reflected light from an optical fiber 12 of high output laser beams 11. SOLUTION: In this method for transmitting high output laser beams 11 through the optical fiber 12, the high output laser beams 11 are made incident on and transmitted in the optical fiber 12 on the laser beam entrance end surface having the diameter R larger than the core diameter r to reduce the incident energy density of the high output laser beams 11, thereby reducing the influence of the reflected light of the high output laser beams 11.

99. 发明专利

JP2000202672A LASER BEAM MACHINING HEAD 失效
公开(公告)号：JP2000202672A
公开(公告)日：2000-07-25
申请号：JP799999
申请日：1999-01-14
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAGURA YASUMI , NAYAMA RISUKE , ISHIDE TAKASHI , HASHIMOTO YOSHIO , DOGE YUKIO , OKIMURA KOJI
IPC分类号： B23K26/064 , B23K26/067 , B23K26/142 , B23K26/16 , B23K26/38 , B23K26/06 , B23K26/00 , B23K26/14
摘要： PROBLEM TO BE SOLVED: To efficiently feed assist gas to a part to be worked by splitting laser beams into plural parts, making an interval between laser beams in the splitting optical system, condensing the split laser beams in the condensing optical system to irradiate the work, arranging an inner assist gas nozzle between the split laser beams, and then making an opening width of the nozzle tip nearly equal to the working width. SOLUTION: Laser beam 26 is divided into split laser beams 26a, 26b in a splitting optical system, and an interval between split laser beams 26a, 26b is made. An inner assist gas nozzle 34 is arranged between the split laser beams 26a, 26b. A laser working head 21 is made to approach a work 22 to be cut, and a working distance is maintained so that a inner assist gas nozzle 34, an outer assist gas nozzle 32, and the work 22 to be cut may not come into contact with one another. The assist gas is injected from gas nozzles 32, 34, the split laser beams 26a, 26b are condensed in a condensing optical system 24 to irradiate the work 22, and thus laser beam machining is executed.

100. 发明专利

JP2000202657A LASER BEAM MACHINING MONITORING DEVICE 失效
公开(公告)号：JP2000202657A
公开(公告)日：2000-07-25
申请号：JP737899
申请日：1999-01-14
申请人： MIYAMOTO ISAMU , MITSUBISHI HEAVY IND LTD
发明人： MIYAMOTO ISAMU , ISHIDE TAKASHI , NAYAMA RISUKE , NAGURA YASUMI , HASHIMOTO YOSHIO , OKIMURA KOJI
IPC分类号： B23K26/00 , B23K26/03 , B23K26/02
摘要： PROBLEM TO BE SOLVED: To enable detecting up to a depth without needing strictness in an installation position and becoming large size by only one set of sensor. SOLUTION: In the case that a work 10 is irradiated with laser beam 11 to machine the work 10, in a monitoring device to detect light emitting state of S part to be worked of the work piece, the light emission of the S part of the work piece which goes back to an optical system 15 on which the laser beam 11 is made incident is made to enter into a sensor 17 through a monitoring system 16 in a branched light passage separated from the laser beam 11.

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