WO2011064966A1 - ガスレーザ発振装置およびガスレーザ加工機 - Google Patents
ガスレーザ発振装置およびガスレーザ加工機 Download PDFInfo
- Publication number
- WO2011064966A1 WO2011064966A1 PCT/JP2010/006745 JP2010006745W WO2011064966A1 WO 2011064966 A1 WO2011064966 A1 WO 2011064966A1 JP 2010006745 W JP2010006745 W JP 2010006745W WO 2011064966 A1 WO2011064966 A1 WO 2011064966A1
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- WIPO (PCT)
- Prior art keywords
- laser
- gas
- grease
- rotational speed
- blower
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/036—Means for obtaining or maintaining the desired gas pressure within the tube, e.g. by gettering, replenishing; Means for circulating the gas, e.g. for equalising the pressure within the tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
Definitions
- the present invention relates to a gas laser oscillation apparatus and a gas laser processing machine provided with a blower for circulating a laser gas.
- a gas laser oscillation apparatus has a pair of electrodes in a sealed case, and a laser gas which is an amplification medium enclosed in the case is forcibly circulated by a blower such as a blower.
- the gas laser oscillation apparatus excites the laser gas by the discharge generated by the pair of electrodes in the housing, forms a resonator by the partial reflecting mirror and the total reflecting mirror, and outputs the laser beam to the outside from the partial reflecting mirror. I have to.
- this gas laser oscillation apparatus sends the irradiated laser light to the processing head via an optical system composed of a plurality of mirrors, and irradiates the laser light to the position positioned on the work on the processing table.
- the gas laser oscillation apparatus is used as a light source for processing of a gas laser processing machine that performs predetermined processing on a work.
- the blower for circulating the laser gas has a structure in which the rotary shaft connected to the impeller for blowing the laser gas is held by a bearing, and grease for lubricating is supplied to this bearing. (See, for example, Patent Document 1).
- the rotary shaft may rotate before the grease sufficiently runs in the bearing, resulting in that the rotary shaft Wear and heat are generated between the bearing and the bearing, contributing to shortening the bearing life.
- the present invention focuses on this problem, and provides a gas laser oscillation apparatus and a gas laser processing machine capable of extending the bearing life.
- the gas laser oscillation apparatus comprises discharge means for generating a discharge in a laser gas, a blower for blowing the laser gas to a discharge generation portion by the discharge, and a controller for controlling the drive of the blower.
- the blowing part of the gas laser device of the present invention has a rotating part that rotates and a non-rotating part that does not rotate, and a bearing is disposed between the rotating part and the non-rotating part, and the bearing is It has a grease supply mechanism that supplies grease.
- the control unit of the gas laser device of the present invention is configured to drive the blower at a rotational speed lower than the rotational speed at the time of laser output after the grease is replenished from the grease supply mechanism to the bearing.
- the blower is driven at a rotational speed lower than the rotational speed at the time of laser output, so grease spreads inside the bearing, and between the rotating shaft and the bearing Since the wear and heat generation can be reduced, the bearing life can be extended.
- the gas laser device of the present invention can ensure high reliability over a long period of time.
- a gas laser processing apparatus includes the gas laser oscillation apparatus described above, a laser beam irradiated from the gas laser oscillation apparatus, and a drive unit for relatively moving a work to be irradiated with the laser beam. It consists of
- the blower is driven at a rotational speed lower than the rotational speed at the time of laser output, so grease spreads inside the bearing, and between the rotating shaft and the bearing Since the wear and heat generation can be reduced, the bearing life can be extended.
- the gas laser processing apparatus of the present invention can ensure high reliability over a long period of time.
- FIG. 1 is a flowchart of a gas laser oscillation apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram of a gas laser oscillation apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is a configuration diagram of a main part of a blower of the gas laser oscillator according to Embodiment 1 of the present invention.
- FIG. 4 is a flowchart of a gas laser oscillation apparatus according to Embodiment 2 of the present invention.
- FIG. 5 is a block diagram of a gas laser processing machine according to Embodiment 3 of the present invention.
- Embodiment 1 1 is a flow chart of a gas laser oscillator according to the first embodiment of the present invention
- FIG. 2 is a block diagram of a gas laser oscillator according to the first embodiment of the present invention
- FIG. 3 is a gas laser oscillator according to the first embodiment of the present invention It is a block diagram of the principal part of a ventilation part.
- a laser gas 2 is circulated in a discharge tube 1 made of an insulator such as glass.
- the laser gas 2 is, for example, a gas in which nitrogen gas and helium gas are mixed with carbon dioxide (hereinafter referred to as “CO 2”) gas as the main component.
- Electrodes 3 and 4 are provided in the discharge tube 1, and a power source 5 is connected to the electrodes 3 and 4 so that a discharge portion is configured to generate a discharge in the discharge tube 1.
- the CO 2 molecules in the reverse distribution generate light.
- This light is amplified by reciprocating in the resonator by the total reflection mirror 6 and the partial reflection mirror 7 disposed so as to face each other at both ends of the discharge tube 1, and is stimulated emission as laser light.
- a part of the stimulated emission laser light is extracted from the partially reflecting mirror 7 to the outside as the laser light 8 and output.
- Helium gas has a cooling effect and suppresses the temperature rise of the laser gas 2 and also functions to return lower level CO 2 molecules unrelated to laser oscillation to the ground state of energy level by collision.
- a gas circulation passage 9 serving as a circulation passage for circulating the laser gas 2 is connected to the discharge tube 1, and a blower 10 for blowing the laser gas 2 is disposed in the middle of the gas circulation passage 9.
- the blower unit 10 circulates the laser gas 2 in the gas circulation path 9 so as to form a gas flow of about 100 m / sec in the discharge tube 1.
- a plurality of heat exchangers 11 for lowering the temperature of the laser gas 2 having a high temperature due to the discharge energy and the heat of compression after passing through the discharge part and the blower part 10 are disposed in the gas circulation path 9.
- a control unit 12 is connected to the blower unit 10 and the power supply 5 to control them, and the control unit 12 is also connected to the alarm unit 13.
- the blower unit 10 uses a centrifugal blower unit to suck the laser gas 2 and attach to the rotating shaft 15 a impeller 14 that discharges the laser gas 2 by rotation.
- a motor rotor 16 is attached to the rotating shaft 15, and a motor stator 17 is disposed at a position facing the motor rotor 16, and the motor stator 17 is fixed to the casing 18.
- bearings 19a and 19b are disposed between the rotating shaft 15 and the casing 18, rotatably support the rotating shaft 15, and grease 20 is enclosed in the bearings 19a and 19b for lubrication.
- the grease replenishing mechanism 21 is disposed adjacent to each of the bearings 19a and 19b, and has a structure in which the grease reduced by volatilization with time or the like is replenished.
- the grease replenishment control device 22 is connected to the grease replenishment mechanism 21 so that detection of the amount of grease and grease replenishment to the grease replenishment mechanism 21 are performed.
- the blower unit 10 is divided into a rotating unit and a non-rotating unit, and the rotating unit is configured of a portion in contact with the impeller 14, the rotating shaft 15, the motor rotor 16, and the rotating shaft 15 of the bearings 19a and 19b.
- the non-rotating portion is composed of a portion in contact with the motor stator 17, the casing 18, and the casing 18 of the bearings 19a, 19b.
- the gas laser oscillation device of the first embodiment drives the blower 10 at a rotation speed lower than the rotation speed at the time of laser output after supplying grease and supplying this grease. .
- the gas laser oscillation apparatus of the first embodiment starts operation according to the flowchart shown in FIG. 1 and operates. That is, in order to perform laser oscillation, when operation is started, the control unit 12 drives and controls the power supply 5 and the blower unit 10 so as to obtain a desired output of the laser beam 8 (step S1). At the same time, a signal from the grease supply control device 22 is input to the control unit 12, and the amount of grease in the bearings 19a, 19b is detected (step S2).
- step S3 It is determined whether the detected amount of grease is less than or equal to a prescribed amount (step S3). If the amount of grease is greater than or equal to the prescribed amount, the controller 12 controls the power supply 5 and the power supply 5 so as to continuously obtain the desired laser beam 8 output. The blower unit 10 is driven and controlled (from step S4 to step S1). On the other hand, when the detected amount of grease is equal to or less than the specified amount, the control unit 12 stops the power supply 5 and the blower 10, and the operation is stopped and the alarm unit 13 is driven (step S5).
- control unit 12 replenishes the bearings 19a and 19b with a predetermined amount of grease from the grease replenishment mechanism 21 via the grease replenishment control device 22 (step S6).
- control unit 12 performs so-called acclimatization operation with a small load, driving the blower unit 10 at a rotation speed lower than the rotation speed at the time of laser output (step S7).
- step S8 It is determined whether or not a predetermined time has elapsed in order to perform this acclimatization operation for a predetermined time required for the grease to conform to the bearing, which has been set in advance (step S8). If the predetermined time has not elapsed, the acclimatization operation is continued, and if the predetermined time has elapsed, the alarm unit 13 is stopped (step S9), and the power supply 5 and the power supply 5 and the desired laser light 8 are obtained again.
- the control unit 12 drives and controls the blower unit 10 (step S1).
- the discharge portion formed of the electrodes 3 and 4 and the power source 5 causing discharge to the laser gas 2 and the blower portion that blows the laser gas 2 to the discharge generation portion by the discharge portion
- a control unit 12 that controls the driving of the blower unit 10.
- the air blowing unit 10 of the gas laser oscillation device has a rotating portion and a non-rotating portion, and the bearings 19a and 19b are disposed between the rotating portion and the non-rotating portion, and grease is supplied to the bearings 19a and 19b.
- a replenishment mechanism 21 is provided.
- the rotating portion is composed of a portion in contact with the rotating shaft 15, the rotating shaft 15, the motor rotor 16, and the rotating shafts 15 of the bearings 19a, 19b that perform rotation.
- the non-rotating portion is composed of the motor stator 17 which does not rotate, the casing 18 and a portion in contact with the casing 18 of the bearings 19a, 19b.
- control unit 12 of the gas laser oscillation device is configured to drive the blower unit 10 at a rotational speed lower than the rotational speed at the time of laser output, after supplying grease from the grease supply mechanism 21 to the bearings 19a and 19b.
- the control unit 12 drives the blower unit 10 at a rotational speed lower than the rotational speed at the time of laser output for a predetermined time, and then drives the blower unit 10 to the rotational speed at the laser output It has composition.
- FIG. 4 is a flowchart of a gas laser oscillation apparatus according to the second embodiment of the present invention.
- the parts having the same configuration as the first embodiment are given the same reference numerals, and the description thereof is omitted.
- the feature of the second embodiment is that the motor stator 17 is replaced with the time of the acclimatization operation in the first embodiment, specifically, in place of the predetermined time required for the grease to become familiar. The point at which the control unit 12 detects and controls the flowing current.
- the gas laser oscillation device starts operation in order to perform laser oscillation.
- the control unit 12 drives and controls the power supply 5 and the blower 10 so as to obtain a desired output of the laser light 8 (step S1).
- a signal from the grease supply control device 22 is input to the control unit 12 to detect the amount of grease in the bearings 19a and 19b (step S2).
- step S3 It is determined whether or not the detected amount of grease is less than or equal to a prescribed amount (step S3). If the amount of grease is greater than or equal to the prescribed amount, the controller 12 controls the power supply 5 to continuously obtain the desired laser beam 8 output. And drive and control the blower unit 10 (from step S4 to step S1). On the other hand, when the detected amount of grease is less than or equal to the specified amount, the control unit 12 stops the power supply 5 and the blower unit 10 to stop the operation and drive the alarm unit 13 (step S5).
- control unit 12 replenishes the bearings 19a and 19b with a predetermined amount of grease from the grease replenishment mechanism 21 via the grease replenishment control device 22 (step S6).
- control unit 12 drives the air blowing unit 10 at a rotational speed lower than the rotational speed at the time of laser output, so-called accustomed operation is performed under a small load condition (step S7).
- control unit 12 detects the current flowing to the motor stator 17 (step S10).
- step S11 It is determined whether or not the detected motor current has become equal to or less than a predetermined value (step S11), and if it is equal to or more than the predetermined value, the acclimatization operation is continued, and if it becomes equal to or less than the predetermined value, the alarm unit 13 is stopped (step S9)
- the power supply 5 and the blower 10 are driven and controlled by the controller 12 so that the desired output of the laser beam 8 can be obtained again (step S1).
- the gas laser oscillator of the second embodiment uses a member including a motor as the blower 10, and the controller 12 detects the value of the current flowing through the motor to detect the load of the motor. Then, the gas laser oscillation device drives the blower 10 at a rotational speed lower than the rotational speed at the time of laser output until the load on the motor is reduced, and then increases the rotational speed at the laser output to the rotational speed. It is configured to be driven.
- FIG. 5 is a block diagram of a gas laser processing machine according to Embodiment 3 of the present invention.
- the gas laser oscillation apparatus according to the first and second embodiments of the present invention described above can be used for the gas laser processing machine shown in FIG. 5, and its schematic configuration will be described with reference to FIG.
- the laser beam 8 output from the gas laser oscillation device 40 according to the first and second embodiments is changed by reflecting the traveling direction by the reflecting mirror 25 in order to irradiate the work 24. Then, the laser beam 8 is condensed to an energy beam of high density light by a condenser lens 27 provided inside the torch 26 and is irradiated to the work 24.
- the work 24 is fixed on the processing table 28, and the torch 26 is moved relative to the work 24 by a drive unit including the X-axis motor 29 or the Y-axis motor 30. It is configured to perform processing of a predetermined shape.
- the above-described gas laser oscillation device 40, the laser beam 8 irradiated from the gas laser oscillation device 40, and the drive unit for relatively moving the work 24 to be irradiated with the laser beam It consists of the provided configuration.
- the blower is driven at a rotational speed lower than the rotational speed at the time of laser output, so grease spreads inside the bearing, and between the rotating shaft and the bearing Since the wear and heat generation can be reduced, the bearing life can be extended.
- the gas laser processing apparatus of the present invention can ensure high reliability over a long period of time.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
Description
図1は本発明の実施の形態1に関するガスレーザ発振装置のフローチャート、図2は本発明の実施の形態1に関するガスレーザ発振装置の構成図、図3は本発明の実施の形態1に関するガスレーザ発振装置の送風部の要部の構成図である。
図4は、本発明の実施の形態2に関するガスレーザ発振装置のフローチャートで、本実施の形態2において、実施の形態1と同じ構成の部分については同じ符号を付し、その説明を省略する。
図5は、本発明の実施の形態3に関するガスレーザ加工機の構成図である。上述の本発明の実施の形態1、2に関するガスレーザ発振装置は、図5に示すガスレーザ加工機に使用可能であり、その概略構成について図5を参照しながら説明する。
2 レーザガス
3,4 電極
5 電源
6 全反射鏡
7 部分反射鏡
8 レーザ光
9 ガス循環経路
10 送風部
11 熱交換器
12 制御部
13 警報部
14 翼車
15 回転軸
16 モータロータ
17 モータステータ
18 ケーシング
19a,19b 軸受
20 グリス
21 グリス補給機構
22 グリス補給制御装置
23 スクロール
24 ワーク
25 反射鏡
26 トーチ
27 集光レンズ
28 加工テーブル
29 X軸モータ
30 Y軸モータ
40 ガスレーザ発振装置
Claims (4)
- レーザガスに放電を発生させる放電部と、
前記レーザガスを前記放電部による放電発生部分に送風する送風部と、
前記送風部の駆動を制御する制御部と、を備え、
前記送風部は、回転を行う回転部と、回転を行わない非回転部とを有し、前記回転部と前記非回転部との間に軸受を配置し、前記軸受にグリスを補給するグリス補給機構を設け、
前記制御部は、前記グリス補給機構から前記軸受へグリスが補給された後、レーザ出力時の回転数よりも低い回転数で前記送風部を駆動するガスレーザ発振装置。 - 前記制御部は、あらかじめ設定された時間の間、前記レーザ出力時の回転数よりも低い回転数で前記送風部を駆動した後、前記送風部をレーザ出力時の回転数に上げて駆動する請求項1記載のガスレーザ発振装置。
- 前記送風部としてモータを含む部材を用い、前記制御部は、前記モータに流れる電流値を検出して前記モータの負荷を検出し、前記モータの負荷が軽減するまでの間、前記レーザ出力時の回転数よりも低い回転数で前記送風部を駆動した後、前記送風部を前記レーザ出力時の回転数に上げて駆動する請求項1記載のガスレーザ発振装置。
- 請求項1から3の何れかに記載のガスレーザ発振装置と、
前記ガスレーザ発振装置から照射されたレーザ光と前記レーザ光を照射するワークとを相対移動させる駆動部と、
を備えたガスレーザ加工機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10832822.0A EP2469667B1 (en) | 2009-11-24 | 2010-11-17 | Gas laser oscillation device and gas laser processing machine |
CN201080050463.9A CN102598436B (zh) | 2009-11-24 | 2010-11-17 | 气体激光振荡装置及气体激光加工机 |
JP2011543098A JP5440612B2 (ja) | 2009-11-24 | 2010-11-17 | ガスレーザ発振装置およびガスレーザ加工機 |
US13/511,024 US10050402B2 (en) | 2009-11-24 | 2010-11-17 | Gas laser oscillation device and gas laser processing machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009265971 | 2009-11-24 | ||
JP2009-265971 | 2009-11-24 |
Publications (1)
Publication Number | Publication Date |
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WO2011064966A1 true WO2011064966A1 (ja) | 2011-06-03 |
Family
ID=44066081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/006745 WO2011064966A1 (ja) | 2009-11-24 | 2010-11-17 | ガスレーザ発振装置およびガスレーザ加工機 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10050402B2 (ja) |
EP (1) | EP2469667B1 (ja) |
JP (1) | JP5440612B2 (ja) |
CN (1) | CN102598436B (ja) |
WO (1) | WO2011064966A1 (ja) |
Cited By (1)
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CN103573695A (zh) * | 2012-07-27 | 2014-02-12 | 富瑞精密组件(昆山)有限公司 | 风扇轮毂的制造方法 |
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JP6432236B2 (ja) * | 2014-09-17 | 2018-12-05 | 富士ゼロックス株式会社 | 粉体塗装装置、及び粉体塗装方法 |
CN110571985B (zh) * | 2019-09-11 | 2022-01-21 | 深圳市速锋科技股份有限公司 | 一种高速电主轴的预热跑合方法 |
CN114673682B (zh) * | 2022-04-26 | 2023-07-21 | 江苏恒康机电有限公司 | 一种调节式离心通风机 |
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2010
- 2010-11-17 EP EP10832822.0A patent/EP2469667B1/en not_active Not-in-force
- 2010-11-17 CN CN201080050463.9A patent/CN102598436B/zh not_active Expired - Fee Related
- 2010-11-17 WO PCT/JP2010/006745 patent/WO2011064966A1/ja active Application Filing
- 2010-11-17 US US13/511,024 patent/US10050402B2/en not_active Expired - Fee Related
- 2010-11-17 JP JP2011543098A patent/JP5440612B2/ja not_active Expired - Fee Related
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CN102598436A (zh) | 2012-07-18 |
EP2469667B1 (en) | 2015-04-01 |
US20120285931A1 (en) | 2012-11-15 |
EP2469667A1 (en) | 2012-06-27 |
JPWO2011064966A1 (ja) | 2013-04-11 |
CN102598436B (zh) | 2014-08-13 |
EP2469667A4 (en) | 2014-06-11 |
US10050402B2 (en) | 2018-08-14 |
EP2469667A9 (en) | 2014-05-14 |
JP5440612B2 (ja) | 2014-03-12 |
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