WO2013121818A1 - レーザ加工機 - Google Patents
レーザ加工機 Download PDFInfo
- Publication number
- WO2013121818A1 WO2013121818A1 PCT/JP2013/050658 JP2013050658W WO2013121818A1 WO 2013121818 A1 WO2013121818 A1 WO 2013121818A1 JP 2013050658 W JP2013050658 W JP 2013050658W WO 2013121818 A1 WO2013121818 A1 WO 2013121818A1
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- WIPO (PCT)
- Prior art keywords
- nozzle
- optical system
- cutting
- laser beam
- workpiece
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
Definitions
- the present invention relates to a laser processing machine that cuts a workpiece with a laser beam, and more particularly to a machine that can finely adjust the irradiation position of the laser beam on the workpiece by deflecting the laser beam.
- a laser processing machine includes an optical system such as a focusing lens that focuses an incident laser beam and irradiates the object to be processed, and a cutting nozzle that blows a cutting gas to the portion of the object to be irradiated with the laser beam.
- a machining head is provided, and the machining head is moved in the three orthogonal directions relative to the workpiece to perform machining such as cutting with a laser beam.
- the machining head is composed of many parts, so it is relatively heavy. For this reason, when the entire machining head is moved, a large inertial force acts and it is difficult to change direction and accelerate / decelerate quickly and accurately. Therefore, the optical system is provided with a deflection direction adjusting means capable of deflecting the laser beam about two orthogonal axes, and for a long distance section such as a straight section, the entire processing head is moved to process the corner section or curve. For a short distance section such as a part, a method of processing by adjusting the deflection angle of the laser beam has been proposed (for example, Patent Document 1).
- An object of the present invention is to perform laser processing in which an optical system has a function of finely adjusting the irradiation position of a laser beam on a workpiece by deflecting the laser beam, and vibration of a cutting nozzle hardly affects the optical system. Is to provide a machine.
- the laser beam machine deflects and focuses an incident laser beam to irradiate a workpiece, and adjusts the deflection direction of the laser beam by the focusing optical system at least about two orthogonal axes.
- An optical system head having a deflection direction adjusting means, a cutting nozzle that blows a cutting gas onto a portion of the processing target irradiated with a laser beam, and a position of the cutting nozzle on a plane parallel to the processing target.
- An optical system / nozzle support member that is individually provided with a nozzle holding head having nozzle position adjusting means that adjusts in synchronization with the operation of the deflection direction adjusting means, and that is movable back and forth in three orthogonal directions relative to the workpiece.
- the optical system head and the nozzle holding head were separately supported.
- the optical system head and the nozzle holding head can be separately supported by the optical system / nozzle support member, the vibration of the cutting nozzle of the nozzle holding head can be hardly transmitted to the focusing optical system of the optical system head.
- it may be supported via a vibration isolator.
- a support structure that increases the natural frequency may be used. Therefore, adverse effects on the deflection of the laser beam by the focusing optical system can be reduced. Therefore, highly accurate processing can be performed.
- the nozzle position adjusting means is outside the region where the cutting nozzle is blown to the workpiece by cutting gas separately from the operation of adjusting the position of the cutting nozzle in synchronization with the operation of the deflection direction adjusting means.
- An operation unit that determines whether the nozzle position adjusting unit performs the adjustment in synchronization or the operation to retreat out of the region may be provided.
- the cutting nozzle when the processing is performed without blowing the cutting gas to the workpiece, the cutting nozzle can be moved out of the processing area so that the cutting nozzle does not get in the way.
- the nozzle position adjusting means includes two rotating arms provided on a base member supported by the optical system / nozzle support member so as to be rotatable about an axis perpendicular to a workpiece.
- Two rotation driving sources that respectively rotate these two rotation arms, and fixed to the cutting nozzle directly or indirectly so as to be parallel to and perpendicular to the workpiece, It is good also as a structure which has two guide rails which each guides a rotation end so that sliding is possible.
- the position of the guide rail is changed in a direction orthogonal to the length direction while the rotation end of the rotation arm moves along the guide rail.
- the position of the cutting nozzle fixed directly or indirectly to the guide rail is also changed. Since the two guide rails are orthogonal to each other, the position of the cutting nozzle is changed in the biaxial directions orthogonal to each other by the rotation of each rotation arm. Therefore, the cutting nozzle can be positioned at an arbitrary target position by rotating the two rotating arms by an appropriate angle.
- the respective rotating arms are in parallel with each other, and the same amount of load is applied to the rotation driving source when either of the rotating arms is rotated.
- the position conversion in one axial direction does not affect the position conversion in the other axial direction, and positioning in the two orthogonal axes can be performed with the same accuracy. That is, it is possible to eliminate the accumulation of errors in the case of a general series relationship (piggyback configuration).
- FIG. 1 is an overall perspective view of a laser beam machine according to an embodiment of the present invention. It is a perspective view of the optical system head and nozzle holding head of the laser beam machine. It is sectional drawing which shows the internal structure of the optical system head. 2 is a perspective view of an X-axis direction scanning mirror, a Y-axis direction scanning mirror, and a scan lens of the optical system head.
- this laser processing machine is provided with a table 2 on which a workpiece W made of a plate material is placed on a bed 1, and the workpiece W placed on this known table 2 is placed on the workpiece W.
- the optical system head 3 and the nozzle holding head 4 perform processing such as cutting while moving in the three orthogonal axes.
- the optical system head 3 and the nozzle holding head 4 are moved by an XYZ axis moving mechanism 5.
- the XYZ-axis moving mechanism 5 includes a Y-axis moving body 7 that is movable back and forth in the front-rear direction (Y-axis direction) along a pair of left and right Y-axis rails 6 installed on the left and right sides of the upper surface of the bed 1, and this Y-axis movement.
- An X-axis moving body 9 that can move back and forth in the left-right direction (X-axis direction) along an X-axis rail 8 installed on the front surface of the body 7 and a Z-axis rail 10 installed on the front surface of the X-axis moving body 9 And a Z-axis moving body 11 that can move forward and backward in the vertical direction (Z-axis direction).
- the XYZ moving bodies 9, 7, and 11 are moved back and forth by, for example, a linear motor.
- the optical system head 3 and the nozzle holding head 4 are individually provided by bolts 12a and the like at the upper part of the vertical surface of the optical system / nozzle support member 12 as a part of the Z-axis moving body 11, respectively.
- the optical system head 3 and the nozzle holding head 4 are supported so as not to be connected.
- the laser beam L oscillated by the laser oscillator 13 is incident on the optical system head 3 via the transmission optical fiber 14.
- the laser oscillator 13 is composed of, for example, a solid laser oscillator.
- the optical system head 3 deflects and focuses the incident laser beam L to irradiate the workpiece W, and the deflection direction of the laser beam L by the focusing optical system 15 is about two orthogonal axes. It has a deflection direction adjusting means 16 for adjusting to the above.
- the focusing optical system 15 includes a plurality of lenses and mirrors provided inside an optical system head housing 17 fixed to the optical system / nozzle support member 12.
- the collimating lens 18 converts the laser beam L emitted from the tip of the transmission optical fiber 14 into a parallel light beam.
- the reflection mirror 19 reflects the laser beam L that has become a parallel light beam toward the X-axis direction scanning mirror 20.
- the X-axis direction scanning mirror 20 is rotatable about the vertical axis (Z-axis direction) and reflects the laser beam L from the reflection mirror 19 toward the Y-axis direction scanning mirror 21 (FIG. 4).
- the Y-axis direction scanning mirror 21 is rotatable about the axis in the left-right direction (X-axis direction) and reflects the laser beam L from the X-axis direction scanning mirror 20 toward the scan lens 22 (FIG. 4).
- Such a scan lens 22 is referred to as a telecentric F- ⁇ scan lens.
- the deflection direction adjusting unit 16 rotates the X-axis direction scanning mirror 20 forward and backward around the vertical axis (Z-axis direction) and the Y-axis direction scanning mirror 21 in the left-right direction (X-axis).
- Direction a Y-axis direction scanning motor 24 that rotates forward and backward about the axis.
- These motors 23 and 24 are provided outside the optical system head housing 17 and fixed to the housing.
- the nozzle holding head 4 has a cutting nozzle 26 that blows a cutting gas on a portion of the workpiece W irradiated with the laser beam L, and a position of the cutting nozzle 26 on a plane parallel to the workpiece.
- nozzle position adjusting means 27 for adjusting in synchronism with the operation of the deflection direction adjusting means 16.
- the cutting nozzle 26 has a blowout port member 26b attached to the lower end of the nozzle body 26a.
- the nozzle body 26a and the blowout port member 26b penetrate both of them vertically.
- Upper and lower through holes 29 are formed.
- the upper and lower through holes 29 are tapered toward the lower side as a whole, and the outlet port 29a at the lower end has a small diameter.
- a hose connection pipe 30 is attached to the upper side surface portion of the nozzle body 26a, and a cutting gas supply source (not shown) provided outside via a hose 31 (FIG. 2) connected to the hose connection pipe 30.
- the cutting gas is supplied to the cutting nozzle 26 from FIG.
- the supplied cutting gas is uniformly injected from the lower part of the protective lens 35 toward the nozzle axis through the annular groove 32, the plurality of small diameter holes 33 and the circumferential gap 34, and is discharged into the upper and lower through holes 29. Furthermore, it sprays toward the workpiece from the blowout port 29a of the upper and lower through holes 29.
- the nozzle position adjusting means 27 has a configuration shown in the plan view of FIG. That is, the two rotating arms 41X provided on the base portion 40 supported by the optical system / nozzle support member 12 so as to be rotatable around the vertical axes OX and OY perpendicular to the workpiece. , 41Y are provided. These two rotation arms 41X and 41Y are rotated by rotation drive sources 42X and 42Y, respectively.
- the rotary arms 41X and 41Y are provided at the rotary ends with sliders 43X and 43Y that are rotatable around the vertical axis 43a and the axis 43b.
- the sliders 43X and 43Y are arranged in the Y-axis direction and the X-axis.
- the guide rails 44X and 44Y extending in the direction are slidably straddled.
- the guide rails 44X and 44Y are installed on the upper surface of a plate 45 provided integrally with the cutting nozzle 26. That is, the guide rails 44X and 44Y are indirectly fixed to the cutting nozzle 26 so as to be parallel to the workpiece and orthogonal to each other.
- the base portion 40 is formed with an opening 40a through which the lower portion of the cutting nozzle 26 is inserted.
- the sliders 43X and 43Y of the rotation arms 41X and 41Y move along the guide rails 44X and 44Y, and the guide rails 44X and 44Y are moved.
- the position is converted in a direction orthogonal to the length direction. Accordingly, the position of the cutting nozzle 26 fixed to the guide rails 44X and 44Y via the plate 45 is also changed. Since the two guide rails 44X, 44Y are orthogonal to each other, the position of the cutting nozzle 26 is changed in two axial directions orthogonal to each other by the rotation of the respective rotation arms 41X, 41Y. Therefore, the cutting nozzle 26 can be positioned at an arbitrary target position by rotating the two rotating arms 41X and 41Y by an appropriate angle.
- the rotation drive sources 42X and 42Y are controlled based on the operation judgment by the calculation unit 46. That is, the calculation unit 46 performs an operation of adjusting the nozzle position adjusting unit 27 in synchronization with the operation of the deflection direction adjusting unit 16 and an operation of retracting the cutting nozzle 26 out of the processing region R (FIG. 8A). It is determined which one is performed, and the rotational drive sources 42X and 42Y are controlled.
- the rotary arms 41X and 41Y are in a parallel relationship with each other, and the rotary drive sources 42X and 42Y are subjected to the same load when the rotary arms 41X and 41Y are rotated. Therefore, the position conversion in one axial direction does not affect the position conversion of the other axis, and positioning in two orthogonal axes can be performed with the same accuracy. That is, it is possible to eliminate the accumulation of errors in the case of a general series relationship (piggyback configuration).
- the nozzle position adjusting means 27 is not limited to the configuration of this embodiment.
- an X-axis slide body (not shown) that is slidable in the X-axis direction with respect to the base portion 40 is provided, and a Y-axis slide body (not shown) that is slidable in the Y-axis direction with respect to the X-axis slide body.
- the cutting nozzle 26 may be provided on the Y-axis slide body.
- the positional relationship between the X-axis slide body and the Y-axis slide body may be reversed. Even with this configuration, the cutting nozzle 26 can be positioned at an arbitrary target position. However, in this configuration, since the axes are in a serial relationship (piggyback configuration), errors accumulate.
- FIG. 8A to 8J are views showing the relationship between the angular position of the rotating arms 41X and 41Y and the position on the plane of the cutting nozzle 26.
- the cutting nozzle 26 is in the processing region R where the cutting gas is blown onto the processing object.
- the processing region R is a region indicated by cross hatching in FIG. Further, when the rotation arm 41Y is set to a specific angular position and the rotation arm 41X is largely rotated, the cutting nozzle 26 is retracted to the retreat position T outside the processing region R as shown in FIG.
- the laser beam L on the workpiece is irradiated.
- the cutting nozzle 26 can blow the cutting gas to the spot.
- the laser beam L deflected by the focusing optical system 15 of the laser beam L is irradiated to the workpiece W through the upper and lower through holes 29 of the cutting nozzle 26.
- FIG. 1 An example of processing by this laser processing machine will be described with reference to FIG.
- the figure shows an example in which a substantially rectangular plate material W1 having a right-angled corner portion and an arc-shaped corner portion is cut from the workpiece W, and a circular hole is formed in the plate material W1.
- Processing is performed by placing the workpiece W on the table 2 in a fixed state.
- the linear portion A having a long distance is processed while moving the irradiation position of the laser beam L on the workpiece W at a high speed by moving the optical system head 3 and the nozzle holding head 4 by the XYZ axis moving mechanism 5.
- the deflection direction of the laser beam L is adjusted by the deflection direction adjusting means 16, whereby the irradiation position of the laser beam L on the workpiece. Machining with fine adjustment.
- the optical system head 3 and the nozzle holding head 4 are composed of many parts and are relatively heavy. For this reason, it is difficult to move the optical system head 3 and the nozzle holding head 4 with the XYZ axis moving mechanism 5 due to a large inertial force and to change the direction and accelerate / decelerate with high accuracy.
- the adjustment of the deflection angle of the laser beam L can be performed with a small output because the light-weight X and Y-axis direction scanning mirrors 20 and 21 are rotated, and an adjustment with good responsiveness is possible. is there. Therefore, it is possible to efficiently process complicated shapes.
- the cutting nozzle 26 When the thickness of the workpiece W is equal to or greater than a certain thickness (for example, 0.8 mm when the output of the laser beam L is 2 kW), the cutting nozzle 26 is positioned in the machining area R, and the workpiece W A cutting gas is sprayed onto the portion irradiated with the laser beam L. Thereby, the molten metal is blown down so that the cutting process can be performed smoothly.
- a certain thickness for example, 0.8 mm when the output of the laser beam L is 2 kW
- the cutting nozzle 26 is retracted to the retracted position T (FIG. 8A).
- the cutting nozzle 26 is retracted to the retracted position T also when performing welding processing or marking processing.
- the vibration of the cutting nozzle 26 provided in the nozzle holding head 4 is affected by the optical system head. 3 can be made difficult to be transmitted to the focusing optical system 15 provided in FIG. Specifically, it may be supported via a vibration isolator. Further, a support structure that increases the natural frequency may be used. Therefore, adverse effects on the deflection of the laser beam L by the focusing optical system 15 can be reduced. Therefore, cutting with high accuracy can be performed.
- the focusing optical system 15 of this embodiment adjusts the deflection direction of the laser beam L around two orthogonal axes, but may be configured to be adjustable around three orthogonal axes. Thereby, it is possible to process a workpiece W that is not a flat plate.
- the workpiece W is fixed in position and the optical system head 3 and the nozzle holding head 4 are moved relative to the workpiece W.
- the nozzle holding head 4 may be fixed in position, and the workpiece W may be moved relative to the optical system head 3 and the nozzle holding head 4.
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Abstract
Description
4…ノズル保持ヘッド
5…XYZ軸移動機構
12…光学系・ノズル支持部材
15…合焦光学系
16…偏向方向調整手段
26…切断ノズル
27…ノズル位置調整手段
40…ベース部
41X,41Y…回動アーム
42X,42Y…回動駆動源
44X,44Y…案内レール
46…演算部
L…レーザビーム
R…加工領域
T…退避位置
W…加工対象物
Claims (4)
- 入射されたレーザビームを偏向かつ集束して加工対象物に照射する合焦光学系、およびこの合焦光学系によるレーザビームの偏向方向を少なくとも直交2軸回りに調整する偏向方向調整手段を有する光学系ヘッドと、
加工対象物におけるレーザビームが照射された箇所に切断用ガスを吹き付ける切断ノズル、およびこの切断ノズルの加工対象物と平行な平面上の位置を、前記偏向方向調整手段の動作と同期して調整するノズル位置調整手段を有するノズル保持ヘッドとを個別に備え、
加工対象物に対して相対的に直交3軸方向に進退自在な光学系・ノズル支持部材に、前記光学系ヘッドおよびノズル保持ヘッドを別々に支持させたレーザ加工機。 - 前記ノズル位置調整手段は、前記切断ノズルの位置を前記偏向方向調整手段の動作と同期して調整する動作とは別に、前記切断ノズルを加工対象物に切断用ガスを吹き付ける領域外へ退避させる動作を行うものであり、このノズル位置調整手段が前記同期して調整する動作、および前記領域外へ退避させる動作のいずれを行うかを判断する演算部を設けた請求項1記載のレーザ加工機。
- 前記ノズル位置調整手段は、前記光学系・ノズル支持部材に支持されたベース部材に、加工対象物に対して垂直な軸心回りに回動自在に設けられた2つの回動アームと、これら2つの回動アームをそれぞれ回動させる2つの回動駆動源と、加工対象物に対し平行かつ互いに直交するように前記切断ノズルに直接または間接的に固定され、前記2つの回動アームの回動端をそれぞれ摺動自在に案内する2本の案内レールとを有する請求項1記載のレーザ加工機。
- 前記ノズル位置調整手段は、前記光学系・ノズル支持部材に支持されたベース部材に、加工対象物に対して垂直な軸心回りに回動自在に設けられた2つの回動アームと、これら2つの回動アームをそれぞれ回動させる2つの回動駆動源と、加工対象物に対し平行かつ互いに直交するように前記切断ノズルに直接または間接的に固定され、前記2つの回動アームの回動端をそれぞれ摺動自在に案内する2本の案内レールとを有する請求項2記載のレーザ加工機。
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CN201380009181.8A CN104114316B (zh) | 2012-02-14 | 2013-01-16 | 激光加工机 |
JP2014500126A JP5928575B2 (ja) | 2012-02-14 | 2013-01-16 | レーザ加工機 |
US14/377,908 US10005154B2 (en) | 2012-02-14 | 2013-01-16 | Laser processing machine |
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USD870166S1 (en) * | 2016-08-31 | 2019-12-17 | Trumpf Gmbh + Co. Kg | Laser processing machine |
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CN114985914A (zh) * | 2022-05-30 | 2022-09-02 | 西南大学 | 十字滑台激光切割头 |
CN116944695B (zh) * | 2023-08-08 | 2024-07-02 | 昆山陆新新材料科技有限公司 | 一种板材切割定距装置 |
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JP5928575B2 (ja) | 2016-06-01 |
JPWO2013121818A1 (ja) | 2015-05-11 |
US10005154B2 (en) | 2018-06-26 |
CN104114316A (zh) | 2014-10-22 |
CN104114316B (zh) | 2015-11-25 |
US20150001195A1 (en) | 2015-01-01 |
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