WO2019146481A1 - ガルバノスキャナおよびレーザ加工機 - Google Patents
ガルバノスキャナおよびレーザ加工機 Download PDFInfo
- Publication number
- WO2019146481A1 WO2019146481A1 PCT/JP2019/001202 JP2019001202W WO2019146481A1 WO 2019146481 A1 WO2019146481 A1 WO 2019146481A1 JP 2019001202 W JP2019001202 W JP 2019001202W WO 2019146481 A1 WO2019146481 A1 WO 2019146481A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laser beam
- unit
- shaft
- hub
- laser
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
Definitions
- the present invention relates to a galvano scanner and a laser beam machine which scan a laser beam by rotating a galvano mirror to an arbitrary angle.
- a galvano scanner is an apparatus provided with a galvano mirror and changing the optical path of a laser beam continuously by rotating this galvano mirror and scanning a laser beam.
- the galvano mirror is rotated to the required angle using the rotation angle detected by the encoder.
- Galvano scanners are often used in laser machines, copiers, displays and the like.
- Patent Document 1 has a tapered portion provided at the tip of a shaft, a streak portion provided with streaks extending in the axial direction at the root of the tapered portion, and fixed by press fitting to the streak portions, and has convex portions in the radial direction of the shaft An encoder with a stopper is disclosed. The stopper described in Patent Document 1 is provided to adjust the rotational position of the shaft to an arbitrary position.
- the present invention has been made in view of the above, and it is an object of the present invention to obtain a galvano scanner that suppresses a decrease in the accuracy of positioning of a galvano mirror.
- a galvano scanner comprises a shaft rotating around a central axis, a cylindrical portion in which an insertion hole into which the shaft is inserted is formed, and a cylindrical portion.
- the diameter of the outer periphery is formed at a position opposite to the fixed portion with respect to the central axis, a fixed portion extending in the radial direction of the cylindrical portion from the outer periphery, a grating plate having an optical pattern formed on the surface and fixed to the fixed portion And a projection extending in a direction.
- FIG. 1 A perspective view of an encoder unit of the galvano scanner according to the first embodiment
- a partial enlarged cross-sectional view of a portion A in FIG. 1 Plan view of the galvano scanner according to the first embodiment
- a perspective view of an encoder unit of a galvano scanner according to a third embodiment The perspective view of the principal part of the shaft of the galvano scanner concerning a 4th embodiment
- FIG. 1 is a diagram showing an outline of the configuration of the galvano scanner according to the first embodiment.
- the galvano scanner 100 includes a mirror unit 1, a motor unit 2, an encoder unit 3, and a control unit 4.
- the mirror unit 1 includes a galvano mirror 11 and a mirror holder 12.
- the galvano mirror 11 is fixed to the mirror holder 12.
- the mirror unit 1 is coupled to a first end of the motor unit 2.
- the mirror holder 12 is fixed to the shaft 22 of the motor unit 2.
- the galvano mirror 11 reflects a light beam such as an incident laser beam.
- the galvano mirror 11 deflects the light beam to an arbitrary angle by rotating in conjunction with the shaft 22. In general, it is sufficient that the rotation angle of the galvano mirror 11 be about ⁇ 20 degrees.
- the encoder unit 3 is installed at the second end of the motor unit 2. The second end is an end of the motor unit 2 and an end opposite to the first end.
- the motor unit 2 includes a motor housing 21, a shaft 22, a pair of bearings 23, a coil 24, and a pair of magnets 25.
- the motor housing 21 accommodates the shaft 22, the pair of bearings 23, the coil 24, and the magnet 25.
- the shaft 22 has a cylindrical shape, and the mirror holder 12 and the galvano mirror 11 are rotated by the rotation of the shaft 22 about the central axis 60.
- the pair of bearings 23 is ring-shaped and supports the shaft 22 rotatably around the central axis 60.
- the coil 24 is wound around the shaft 22 as a rotor.
- the pair of magnets 25 is a rectangular solid, and is fixed to the motor housing 21 so as to face each other with the coil 24 as the stator.
- the pair of magnets 25 may be ring-shaped alone.
- a gap is provided between the coil 24 and the magnet 25.
- a rotational torque is exerted on the coil 24 by the electromagnetic force, and the shaft 22 is rotated. That is, the motor unit 2 generates a torque that rotates the galvano mirror 11 to a required angle.
- the motor unit 2 is an induction motor or a permanent magnet motor. In the present embodiment, the motor unit 2 is described as a permanent magnet motor. Further, in the present embodiment, the motor unit 2 is configured such that the coil 24 is wound around the shaft 22 as a rotor and the magnet 25 is fixed to the motor housing 21 as a stator, but the coil 24 is fixed.
- composition fixed to motor case 21 as a child it is good also as composition fixed to motor case 21 as a child, and cylindrical magnet 25 is inserted in the perimeter part of shaft 22 as a rotor.
- the coil 24 may be fixed to the motor housing 21 as a stator, and the magnet 25 may be embedded in the shaft 22.
- the control unit 4 includes an angle command generator 41, a servo amplifier 42, a light projecting circuit 43, and a light receiving circuit 44.
- the angle command generator 41 generates angle command data.
- the angle command data is command data indicating a target angle of the galvano mirror 11.
- the servo amplifier 42 receives angle command data from the angle command generator 41. Also, the servo amplifier 42 compares the angle command data with the data of the angle of the galvano mirror 11 input from the encoder unit 3 and performs feedback control to rotate the galvano mirror 11 to a target angle.
- the light emitting circuit 43 is a drive circuit that causes a light emitting unit 51 described later to emit light.
- the light receiving circuit 44 is a circuit that amplifies a signal received by a light receiving unit 52 described later.
- FIG. 2 is a perspective view of the encoder unit 3 of the galvano scanner 100 according to the first embodiment.
- FIG. 3 is a partially enlarged cross-sectional view of a portion A of FIG.
- the encoder unit 3 includes a grating plate 50, a hub 30, a stopper plate 35, a stopper abutting portion 36, a screw 37, a light projecting portion 51, and a light receiving portion 52.
- An optical pattern is formed on the grating plate 50.
- the grating plate 50 is formed of either glass or aluminum.
- the optical pattern is formed by vapor-depositing a metal thin film such as aluminum on the surface of the grating plate 50.
- the optical pattern may be formed by depositing a dielectric multilayer film on the surface of the grating plate 50 instead of aluminum or the like.
- the hub 30 fixes the grating plate 50.
- the hub 30 is formed of either aluminum or stainless steel.
- the stopper plate 35 is fixed to the motor housing 21.
- the screw 37 fixes the motor housing 21 and the stopper plate 35. Details of the hub 30 and the stopper plate 35 will be described later.
- the light projector 51 emits light.
- the light emitting unit 51 is, for example, a light emitting diode (LED) or a laser diode (LD).
- the light receiving unit 52 takes in the light emitted from the light emitting unit 51.
- the light receiving unit 52 is, for example, a PD (Photodiode).
- the light projecting unit 51 and the light receiving unit 52 are shown only in FIGS. 1 and 3 in order to simplify the illustrated functional units.
- the light emitter 51 and the light receiver 52 are provided to face the surface of the grating plate 50.
- the light emitting unit 51 and the light receiving unit 52 are provided apart from the grating plate 50 in the direction of the central axis 60 by a predetermined distance. That is, the encoder unit 3 is a so-called reflective encoder in which the light reflected by the grating plate 50 from the light projecting unit 51 is received by the light receiving unit 52.
- the encoder unit 3 detects the rotation position of the mirror unit 1 by receiving the light reflected by the grating plate 50 from the light emitting unit 51 by the light receiving unit 52.
- the hub 30 includes a hub cylindrical portion 31, a hub fixing portion 32, and a hub protrusion 33.
- the hub cylindrical portion 31 is a cylindrical portion.
- the hub fixing portion 32 is a fixing portion.
- the hub protrusion 33 is a protrusion.
- An insertion hole 34 is formed at the center of the hub cylindrical portion 31.
- the shaft 22 is inserted into the insertion hole 34 of the hub cylindrical portion 31, and the hub cylindrical portion 31 and the shaft 22 are fixed.
- the hub fixing portion 32 extends in the radial direction perpendicular to the central axis 60 and is fixed to the outer periphery of the hub cylindrical portion 31.
- the hub fixing portion 32 and the grating plate 50 are fixed to each other.
- the hub protrusion 33 is provided in the radial direction opposite to the hub fixing portion 32 with respect to the central axis 60.
- the hub cylindrical portion 31, the hub fixing portion 32 and the hub protrusion 33 rotate together with the shaft 22 without being integrated with the rotation of the shaft 22.
- the stopper plate 35 will be described in detail.
- the stopper plate 35 is a plate having a thickness, which is cut out concentrically from the fan-shaped center axis 60 and a part of which is cut out.
- the stopper contact portion 36 is a surface formed by cutting out a part of the stopper plate 35.
- the stopper abutting portion 36 is provided at a position corresponding to each of the maximum angles in the positive direction and the negative direction required for the rotation of the shaft 22.
- the side surface of the hub protrusion 33 abuts against the stopper contact portion 36 of the stopper plate 35 when the shaft 22 rotates at the maximum angle required, and prevents rotation of the shaft beyond the maximum angle.
- the height and width of the hub projection 33 are adjusted to such a length that the weight of the stopper abutment 36 fulfills the function of blocking the rotation of the shaft 22.
- the maximum angle required by the shaft 22 is about ⁇ 20 degrees.
- the stopper plate 35 is also used to determine the absolute value of the maximum angle of the shaft 22. That is, the stopper plate 35 is screwed by the screw 37 in a state in which the hub projection 33 rotated by the maximum angle abuts on the stopper abutting portion 36.
- the screw holes of the stopper plate 35 are elongated holes to enable angular position adjustment.
- the galvano scanner 100 is required to have a high-speed response due to a demand for improvement of processing efficiency by scanning of laser light. For this reason, the shaft 22 in which the galvano mirror 11, the bearing 23, the hub 30, and the grating plate 50 operate in an integrated manner operates at high speed to a region where mechanical resonance occurs due to torsional vibration and bending vibration.
- the peak of the resonant frequency of the galvano scanner 100 is removed by the notch filter by the signal processing circuit of the servo amplifier 42.
- the notch filter has a problem that a phase delay occurs, and the lower the mechanical resonance frequency, the larger the phase delay due to the notch filter.
- the phase delay is a factor that hinders the improvement of the gain of the servo amplifier 42.
- FIG. 4 is a plan view of the galvano scanner 100 according to the first embodiment.
- a unit in which the hub 30, the grating plate 50 and the shaft 22 are assembled integrally is called a hub unit.
- the center of gravity of the hub unit is indicated by a black circle in FIG.
- the distance between the central axis 60 and the center of gravity of the hub unit is indicated by an eccentricity distance hw1 in FIG.
- the weight of the hub protrusion 33 is in balance with the combined weight of the hub fixing portion 32 on the opposite side of the central axis 60 and the grating plate 50. For this reason, the distance between the central axis 60 and the center of gravity of the hub unit, that is, the eccentric distance hw1 is shorter than the eccentric distance in the state without the hub projection 33.
- the reduction of the eccentricity distance is effective to improve the resonance frequency of bending vibration in the direction perpendicular to the central axis 60 from the bearing 23 as a starting point.
- the hub protrusion 33 is provided on the opposite side of the hub fixing portion 32 with respect to the central axis 60 of the shaft 22. Therefore, as compared with the case where the hub projection 33 is not provided on the hub 30, the eccentric distance of the hub unit is shortened, and the resonance frequency of the torsional vibration and the bending vibration is improved. By improving the resonance frequency, it is possible to reduce the phase delay due to the notch filter of the servo amplifier 42. Therefore, since the servo gain of the servo amplifier 42 is improved, high speed positioning of the galvano mirror 11 is possible.
- the eccentric distance hw1 is about 0.55 mm.
- the eccentricity distance is shorter than the eccentricity distance when the hub projection 33 is not provided in the hub 30, so that the bearing 23 in the direction perpendicular to the central axis 60 is obtained.
- the resonant frequency of the bending vibration as the starting point is improved.
- the hub 30 can satisfy two functions with one component by providing the hub fixing portion 32 having a function of fixing the grating plate 50 and the hub projection 33 having a function as a stopper. Therefore, the number of parts of the galvano scanner 100 is reduced as compared with the case where the hub fixing portion 32 and the hub protrusion 33 are provided as separate parts. Also, it is not necessary to provide a thick member or a workpiece having the function as a stopper in the axial direction of the shaft 22. Therefore, the length of the shaft 22 is shortened, and the resonance frequency of the torsional vibration is improved.
- FIG. 5 is a perspective view of the encoder unit of the galvano scanner according to the second embodiment.
- the components having the same functions as those in the first embodiment are given the same reference numerals as those in the first embodiment, and redundant description will be omitted.
- the hub 301 of the encoder unit 3 a includes a hub protrusion 331 instead of the hub protrusion 33 of the first embodiment.
- the height of the hub protrusion 331 is H, and the height is higher than that of the hub protrusion 33.
- the height H is indicated by the double-headed arrow in FIG. Since the height of the hub protrusion 331 is H, the weight of the hub protrusion 331 is increased. Therefore, the eccentricity of the entire hub 301 can be adjusted to be small.
- the height of the hub projection 331 may be smaller than that of the hub projection 33 in order to reduce the weight of the hub projection 331 in accordance with the eccentricity of the entire hub 301.
- the eccentricity of the entire hub 301 can be adjusted to be small. Also in the present embodiment, the same effects as in the first embodiment can be obtained.
- the hub projection 331 is heavier than the hub projection 33 of the first embodiment. For this reason, the moment of inertia of the rotating portion of the shaft 22 is increased.
- the weight of the hub 301 increases, the resonant frequency of torsional vibration between the bearing 23 and the shaft 22 decreases.
- the present embodiment reduces eccentricity without increasing the number of parts, and improves the resonance frequency of bending vibration. Therefore, the designer may set the resonance frequency of the entire galvano scanner on the premise of the eccentricity reduced according to the present embodiment and the moment of inertia.
- FIG. 6 is a perspective view of the encoder unit of the galvano scanner according to the third embodiment.
- the components having the same functions as those in the first embodiment are given the same reference numerals as those in the first embodiment, and redundant description will be omitted.
- the hub 302 of the encoder portion 3 b includes a hub protrusion 332 and a stopper plate 351 instead of the hub protrusion 33 and the stopper plate 35.
- the stopper plate 351 also has a stopper contact portion 361.
- the width of the hub projection 332 is W, which is wider than the hub projection 33 of the first embodiment.
- the width W is indicated by the double-headed arrow in FIG.
- the weight of the hub protrusion 332 can be adjusted to reduce the eccentricity of the hub 302.
- the width of the hub projection 332 may be smaller than the hub projection 33 in order to reduce the weight of the hub projection 332 according to the eccentricity of the entire hub 302.
- the stopper contact portion 361 needs to widen or narrow the interval between the two stopper contact portions 361 so as to be able to rotate by the maximum angle of the shaft 22 according to the change of the width W of the hub protrusion 332.
- the eccentricity of the entire hub 302 can be adjusted to be small. Also in the present embodiment, the same effects as in the first embodiment can be obtained. Further, in the present embodiment as well, the weight is increased by the hub projection 332, and therefore, the designer is required to be a galvano under the premise of the eccentricity reduced according to the present embodiment and the moment of inertia as in the second embodiment. It is necessary to set the resonance frequency of the entire scanner.
- FIG. 7 is a perspective view of the main part of the shaft of the galvano scanner according to the fourth embodiment.
- the shaft 221 includes a protrusion 333, a fixing portion 321, and the grating plate 50.
- a portion corresponding to the hub 30 of the first embodiment is molded using the shaft 221.
- molding is a concept including processing such as cutting.
- the fixing portion 321 corresponds to the hub fixing portion 32 of the first embodiment.
- the protrusion 333 corresponds to the hub protrusion 33 of the first embodiment.
- the hub 30 is unnecessary, and a portion corresponding to the hub cylindrical portion 31 is also unnecessary.
- the number of parts of the galvano scanner is smaller than in the first to third embodiments, and in addition, the same effect as the first to third embodiments can be obtained.
- the thickness of the shaft 221 be equal to the width dimension of the fixing portion 321.
- the width of the shaft 221 is thinner than the width of the fixing portion 321, it is difficult to secure a material for integrally forming the shaft and the hub.
- the width of the shaft 221 is smaller than the thickness of the fixing portion 321, it is necessary to select the configuration of another part by the hubs 30, 301, 302 of the first to third embodiments. That is, it is desirable to make the thickness of the shaft 221 thicker than the shafts of the first to third embodiments.
- the shaft 221 When the shaft 221 is thick, as described above, the moment of inertia of the shaft 221 is large. Therefore, the resonant frequency is lowered. However, since there is also an effect by thickening the shaft 221, it is sufficient to set the resonance frequency of the entire galvano scanner while taking into consideration the eccentricity and the moment of inertia as described above.
- the effect of thickening the shaft 221 is that, for example, when the shaft 221 is thin, the mirror holder 12 is necessary because the gripping width of the galvano mirror 11 can not be taken sufficiently, but when the shaft 221 is thick, the galvano mirror 11 Since the grip width can be secured, there is an effect that the mirror holder 12 can be eliminated. In addition, there is an effect that the length in the central axis 60 direction can be shortened as compared with the case where the shaft 22 and the mirror holder 12 are used.
- the position of the hub projection is not limited to the symmetrical position of 180 ° if it is opposite to the hub fixing portion 32 with the central axis 60 of the shaft as the origin, and the hub projection and the hub
- the fixing portion 32 may be provided in a symmetrical direction of 180 ° with the central axis 60 of the shaft as an origin.
- the hub protrusion may be formed at a position opposite to the hub fixing portion 32 with respect to the central axis 60.
- the reflection type encoder is configured using the hub fixing portion 32 of the encoder portion and the grating plate 50 fixed to the hub fixing portion 32.
- Embodiments 1 to 4 are not limited to the reflective encoder, but are transmissive encoders in which the light emitting unit and the light receiving unit are arranged with respect to the grating plate 50 with the grating plate 50 being separated. It is also good. In this case, since the light emitting unit and the light receiving unit are disposed to separate the grating plate 50, the light emitted from the light emitting unit transmits the optical pattern and is input to the light receiving unit.
- the grating plate 50 has a shape in which the light emitted from the light emitting unit protrudes largely outward from the outer peripheral portion of the hub fixing portion 32 in order to transmit the optical pattern. For this reason, the grating plate 50 becomes larger and heavier than that of the reflective encoder. For this reason, it is necessary to determine the size and shape so as to adjust the eccentricity and moment of inertia of the hub unit by increasing the weight of the hub projection as much as the weight of the grating plate 50 is increased.
- FIG. 8 is a diagram showing the configuration of a laser processing machine according to the fifth embodiment.
- the laser processing machine 71 performs processing such as drilling on a workpiece 110 such as a printed circuit board.
- the laser processing machine 71 splits one laser beam 79 into two laser beams 80 and 81 and scans the laser beams 80 and 81 independently in order to improve the productivity of the workpiece 110.
- the workpiece 110 is processed.
- the laser beam 79 is also referred to as a first laser beam.
- the laser beam 80 is also referred to as a second laser beam.
- the laser beam 81 is also called a third laser beam.
- the laser processing machine 71 includes a laser oscillator 72, a retarder 73, mirrors 74-1 to 74-4, a first polarization beam splitter 75, a second polarization beam splitter 76, a lens 77, a galvano scanner 100. -1 to 100-4 and a stage 78.
- the galvano scanners 100-1 and 100-2 are also collectively referred to as a first galvano scanner set 120.
- the galvano scanners 100-3 and 100-4 are also collectively referred to as a second galvano scanner set 130.
- the retarder 73 and the first polarization beam splitter 75 are also collectively referred to as a first beam splitter section.
- the second polarization beam splitter 76 is also referred to as a second beam splitter section.
- the first polarization beam splitter 75 and the second polarization beam splitter 76 are elements that use polarization to split one beam into two beams or merge two beams.
- the retarder 73 and the first polarization beam splitter 75 are combined to form a first beam splitter portion, and the second polarization beam splitter 76 is configured to be a second beam splitter portion.
- the beam splitter unit and the second beam splitter unit may have other configurations having equivalent functions.
- the laser oscillator 72 outputs a linearly polarized laser beam 79.
- the laser oscillator 72 is a carbon dioxide gas (CO 2 ) laser oscillator.
- CO 2 carbon dioxide gas
- the retarder 73 converts the linearly polarized laser beam 79 into a circularly polarized laser beam 79.
- the mirrors 74-1 to 74-4 reflect the laser beam 79 or the laser beam 80.
- the first polarization beam splitter 75 splits the laser beam 79 into two laser beams 80 and 81.
- the second polarization beam splitter 76 guides the laser beams 80 and 81 to the galvano scanner 100-3.
- the lens 77 is an f ⁇ lens, and focuses the laser beams 80 and 81 onto the workpiece 110.
- the first galvano scanner set 120 manipulates the laser beam 81 in two axial directions, and guides the laser beam 81 to the second polarization beam splitter 76.
- the second galvano scanner set 130 operates the laser beams 80 and 81 in two axial directions, and guides the laser beams 80 and 81 to the workpiece 110.
- the stage 78 fixes the workpiece 110 and moves in the X axis direction or the Y axis direction.
- the laser beam 79 output from the laser oscillator 72 is converted from the linearly polarized laser beam 79 to a circularly polarized laser beam 79 by the retarder 73 and passes through the mirrors 74-1 and 74-2 and then the first polarized beam
- the light is split into two laser beams 80 and 81 by the splitter 75.
- the laser beam 80 is introduced into the second polarization beam splitter 76 via the mirrors 74-3 and 74-4.
- the laser beam 81 is introduced into the second polarization beam splitter 76 via the first galvano scanner set 120.
- the laser beam 81 is scanned in two axial directions by the first galvano scanner set 120.
- the laser beams 80 and 81 are introduced into the second polarization beam splitter 76 to be merged, and scanned in two axial directions by the control of the swing angle of the second galvano scanner set 130.
- the laser beams 80 and 81 are collected by the lens 77 to process the workpiece 110 on the stage 78.
- the laser beams 80 and 81 will be described.
- the laser beam 80 transmitted through the first polarization beam splitter 75 is reflected by the second polarization beam splitter 76.
- the laser beam 81 reflected by the first polarization beam splitter 75 is transmitted through the second polarization beam splitter 76.
- the laser beam 80 is guided to the second polarization beam splitter 76 always at the same position.
- the position and angle at which the laser beam 81 is incident on the second polarization beam splitter 76 are adjusted by controlling the swing angle of the first galvano scanner set 120.
- a laser beam 81 indicated by a solid line is a laser beam whose position after being incident on the second polarization beam splitter 76 becomes the same position as the laser beam 80 by controlling the swing angle of the first galvano scanner set 120 .
- the laser beam 81a indicated by a broken line is a laser beam at which the laser beam after entering the second polarization beam splitter 76 becomes a different position from the laser beam 80 by controlling the swing angle of the first galvano scanner set 120. .
- the position and angle of the incident laser beam are not limited to the laser beams 81 and 81a by controlling the swing angle of the first galvano scanner set 120.
- the laser processing machine 71 adjusts the swing angle of the first galvano scanner set 120 to make the distance between the second polarization beam splitter 76 and the laser beam 80 longer than that of the laser beam 81 a. Laser light can be scanned. Further, the laser processing machine 71 adjusts the swing angle of the first galvano scanner set 120 so that the distance between it and the laser beam 80 when passing through the second polarization beam splitter 76 is greater than that of the laser beam 81 a. Even short laser beams can be scanned.
- the position and angle at which the laser beam 80 reflected by the second polarization beam splitter 76 and the laser beam 81 transmitted through the second polarization beam splitter 76 are incident on the lens 77 by the second galvano scanner set 130 are adjusted Be done.
- the laser beams 80 and 81a are illustrated in FIG. 8, the laser beam whose position and angle are adjusted by the control of the swing angle of the second galvano scanner set 130 is not limited to the laser beams 80 and 81 a. .
- the laser processing machine 71 can scan the position transmitting the lens 77 at a position different from that of the laser beam 80 or 81a in FIG.
- the laser processing machine 71 processes the workpiece 110 at two places simultaneously by separately scanning the laser beams 80 and 81 using the first galvano scanner set 120 and the second galvano scanner set 130. Can do. Since the circularly polarized laser beam 79 has polarization components in all directions homogeneous, the laser beam 80 and the laser beam 81 are split by the first polarization beam splitter 75 so as to have the same energy. Further, by making the optical path lengths of the laser beams 80 and 81 from the first polarization beam splitter 75 to the second polarization beam splitter 76 identical, the beam spot diameters of the laser beams 80 and 81 can be made identical. . The laser processing machine 71 enables processing of the workpiece 110 in a wide range by controlling the stage 78.
- the laser processing machine 71 includes the galvano scanners 100-1 to 100-4.
- the laser beam machine 71 enables high-speed scanning of the laser beams 80 and 81 by high-speed positioning of the galvano mirror 11 provided in the galvano scanner 100. Therefore, the laser processing machine 71 can perform a large number of drilling processes on the workpiece 110 in a short time, and can improve the productivity of the workpiece 110.
- the galvano scanner 100 suppresses the decrease in the positioning accuracy of the galvano mirror 11 by shortening the eccentric distance of the hub unit as described in the first embodiment. Therefore, the laser processing machine 71 including the galvano scanners 100-1 to 100-4 can also suppress the decrease in the accuracy of positioning of the galvano mirror 11.
- the configuration shown in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and one of the configurations is possible within the scope of the present invention. Parts can be omitted or changed.
- the laser beam output from the laser oscillator 72 is scanned in two axial directions by control of the swing angle of the galvano scanner set, collected by the lens 77 and collected on the stage 78.
- the structure which can process the to-be-processed object 110 is mentioned.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Description
図1は、実施の形態1に係るガルバノスキャナの構成の概略を示す図である。ガルバノスキャナ100は、ミラー部1と、モータ部2と、エンコーダ部3と、制御部4とを備える。
図5は、実施の形態2に係るガルバノスキャナのエンコーダ部の斜視図である。なお、実施の形態1と同一の機能を有する構成要素は、実施の形態1と同一の符号を付して重複する説明を省略する。
図6は、実施の形態3に係るガルバノスキャナのエンコーダ部の斜視図である。なお、実施の形態1と同一の機能を有する構成要素は、実施の形態1と同一の符号を付して重複する説明を省略する。
図7は、実施の形態4に係るガルバノスキャナのシャフトの要部の斜視図である。シャフト221は、突起部333と、固定部321と、グレーティング板50とを備える。本実施の形態では、実施の形態1のハブ30に相当する部分を、シャフト221を用いて成形する。ここで、成形とは、切削等の加工を含む概念である。固定部321は、実施の形態1のハブ固定部32に相当する。突起部333は、実施の形態1のハブ突起部33に相当する。本実施の形態では、ハブ30は不要でありハブ円筒部31に相当する部分も不要である。
図8は、実施の形態5に係るレーザ加工機の構成を示す図である。レーザ加工機71は、プリント基板などの被加工物110に孔あけなどの加工を行う。レーザ加工機71は、被加工物110の生産性の向上を目的として、1つのレーザ光79を2つのレーザ光80,81に分光し、レーザ光80,81を独立に走査することにより、2箇所同時に被加工物110の加工を行なう。レーザ光79は、第1のレーザ光とも呼ばれる。レーザ光80は、第2のレーザ光とも呼ばれる。レーザ光81は、第3のレーザ光とも呼ばれる。
Claims (9)
- 中心軸を中心に回転するシャフトと、
前記シャフトが挿入される挿入穴が形成される円筒部と、
前記円筒部の外周から前記円筒部の径方向に伸びる固定部と、
表面に光学パターンが形成され前記固定部に固定されるグレーティング板と、
前記中心軸に対して前記固定部の反対側になる位置に形成されて前記外周の径方向に伸びる突起部と、
を備えることを特徴とするガルバノスキャナ。 - 前記シャフトが回転したとき前記突起部の側面と当接する位置にストッパ板を備えることを特徴とする請求項1に記載のガルバノスキャナ。
- 前記シャフトを有するモータ部と、
前記モータ部の端部である第1の端部に連結されるミラー部と、
前記第1の端部と反対側の端部である第2の端部に設置され、前記ミラー部の回転位置を検出するエンコーダ部と、
を備え、
前記エンコーダ部は、
前記円筒部と、前記固定部と、前記突起部と、前記グレーティング板と、
前記グレーティング板の表面に光を照射する投光部と、
前記グレーティング板から反射された光を検出する受光部と、
を備えることを特徴とする請求項1に記載のガルバノスキャナ。 - 前記エンコーダ部は、
前記シャフトが回転したとき前記突起部の側面と当接する位置にストッパ板を備えることを特徴とする請求項3に記載のガルバノスキャナ。 - 中心軸を中心に回転するシャフトと、
前記シャフトの外周の径方向に伸びる固定部と、
表面に光学パターンが形成され前記固定部に固定されるグレーティング板と、
前記中心軸に対して、前記固定部と反対側の前記外周の径方向に伸びる突起部と、
を備えることを特徴とするガルバノスキャナ。 - 前記シャフトを有するモータ部と、
前記モータ部の端部である第1の端部に連結されるミラー部と、
前記第1の端部と反対側の端部である第2の端部に設置され、前記ミラー部の回転位置を検出するエンコーダ部と、
を備え、
前記エンコーダ部は、
前記グレーティング板の表面に光を照射する投光部と、
前記グレーティング板から反射された光を検出する受光部と、
を備えることを特徴とする請求項5に記載のガルバノスキャナ。 - 前記エンコーダ部は、
前記シャフトが回転したとき前記突起部の側面と当接する位置にストッパ板を備えることを特徴とする請求項6に記載のガルバノスキャナ。 - レーザ光を出力するレーザ発振器と、
前記レーザ光を集光させるレンズと、
前記レーザ光の前記レンズに入射する位置および角度を調整する、請求項1から7のいずれか1つに記載のガルバノスキャナを2つ備えるガルバノスキャナセットと、
を備えることを特徴とするレーザ加工機。 - 第1のレーザ光を出力するレーザ発振器と、
前記第1のレーザ光を第2のレーザ光と第3のレーザ光とに分光する第1のビームスプリッタ部と、
前記第2のレーザ光と、前記第3のレーザ光とを合流させる第2のビームスプリッタ部と、
前記第2のレーザ光と前記第3のレーザ光とを集光させるレンズと、
前記第3のレーザ光の前記第2のビームスプリッタ部に入射する位置および角度を調整する、請求項1から7のいずれか1つに記載のガルバノスキャナを2つ備える第1のガルバノスキャナセットと、
前記第2のレーザ光、および前記第3のレーザ光の前記レンズに入射する位置および角度を調整する、請求項1から7のいずれか1つに記載のガルバノスキャナを2つ備える第2のガルバノスキャナセットと、
を備えることを特徴とするレーザ加工機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980009412.2A CN111656250B (zh) | 2018-01-26 | 2019-01-17 | 电扫描器及激光加工机 |
JP2019567023A JP6808077B2 (ja) | 2018-01-26 | 2019-01-17 | ガルバノスキャナおよびレーザ加工機 |
KR1020207020653A KR102439918B1 (ko) | 2018-01-26 | 2019-01-17 | 갈바노 스캐너 및 레이저 가공기 |
TW108102928A TWI686624B (zh) | 2018-01-26 | 2019-01-25 | 電流計式掃描器及雷射加工機 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018-011263 | 2018-01-26 | ||
JP2018011263 | 2018-01-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019146481A1 true WO2019146481A1 (ja) | 2019-08-01 |
Family
ID=67395965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/001202 WO2019146481A1 (ja) | 2018-01-26 | 2019-01-17 | ガルバノスキャナおよびレーザ加工機 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP6808077B2 (ja) |
KR (1) | KR102439918B1 (ja) |
CN (1) | CN111656250B (ja) |
TW (1) | TWI686624B (ja) |
WO (1) | WO2019146481A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003307700A (ja) * | 2002-04-18 | 2003-10-31 | Mitsubishi Electric Corp | ガルバノスキャナ |
JP2008046460A (ja) * | 2006-08-18 | 2008-02-28 | Sumitomo Heavy Ind Ltd | ビームスキャナ |
JP2011203632A (ja) * | 2010-03-26 | 2011-10-13 | Mitsubishi Electric Corp | ガルバノスキャナ |
JP2014029467A (ja) * | 2012-07-06 | 2014-02-13 | Mitsubishi Electric Corp | 偏光位相差板およびレーザ加工機 |
JP2015130733A (ja) * | 2014-01-07 | 2015-07-16 | キヤノン株式会社 | 駆動装置および物品処理装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0663542B2 (ja) * | 1986-03-31 | 1994-08-22 | 日本精工株式会社 | スピンドルユニツト |
JP2782923B2 (ja) | 1990-06-21 | 1998-08-06 | 松下電器産業株式会社 | 自走式掃除機 |
JP3511359B2 (ja) * | 1998-02-27 | 2004-03-29 | 三菱電機株式会社 | レーザ加工装置 |
DE112006002720B4 (de) * | 2005-10-11 | 2014-11-20 | Gsi Group Corp. | Optische Messskala und laserbasierte Erstellungsmethode dafür |
US20070291382A1 (en) * | 2006-06-16 | 2007-12-20 | Pinard Adam I | Mirror mounting structures and methods employing shape memory materials for limited rotation motors and scanners |
JP5744330B2 (ja) * | 2012-06-08 | 2015-07-08 | 三菱電機株式会社 | ガルバノスキャナおよびレーザ加工機 |
CN103529507B (zh) * | 2012-07-06 | 2016-05-25 | 三菱电机株式会社 | 偏振光相位差板以及激光加工机 |
-
2019
- 2019-01-17 WO PCT/JP2019/001202 patent/WO2019146481A1/ja active Application Filing
- 2019-01-17 CN CN201980009412.2A patent/CN111656250B/zh active Active
- 2019-01-17 JP JP2019567023A patent/JP6808077B2/ja active Active
- 2019-01-17 KR KR1020207020653A patent/KR102439918B1/ko active IP Right Grant
- 2019-01-25 TW TW108102928A patent/TWI686624B/zh active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003307700A (ja) * | 2002-04-18 | 2003-10-31 | Mitsubishi Electric Corp | ガルバノスキャナ |
JP2008046460A (ja) * | 2006-08-18 | 2008-02-28 | Sumitomo Heavy Ind Ltd | ビームスキャナ |
JP2011203632A (ja) * | 2010-03-26 | 2011-10-13 | Mitsubishi Electric Corp | ガルバノスキャナ |
JP2014029467A (ja) * | 2012-07-06 | 2014-02-13 | Mitsubishi Electric Corp | 偏光位相差板およびレーザ加工機 |
JP2015130733A (ja) * | 2014-01-07 | 2015-07-16 | キヤノン株式会社 | 駆動装置および物品処理装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2019146481A1 (ja) | 2020-07-16 |
CN111656250B (zh) | 2022-12-06 |
JP6808077B2 (ja) | 2021-01-06 |
KR20200100130A (ko) | 2020-08-25 |
TW201932911A (zh) | 2019-08-16 |
TWI686624B (zh) | 2020-03-01 |
KR102439918B1 (ko) | 2022-09-02 |
CN111656250A (zh) | 2020-09-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019146481A1 (ja) | ガルバノスキャナおよびレーザ加工機 | |
CN108994455B (zh) | 一种高效激光打孔及清洗光学系统 | |
JP3137219U (ja) | Mems振動レーザスキャナ | |
TW200844478A (en) | MEMS oscillating laser scanning unit and assembly method of the same | |
JPS60233616A (ja) | 光学走査装置 | |
JP2004177502A (ja) | レーザ走査装置 | |
JP2010274292A (ja) | レーザ加工装置 | |
JP3283217B2 (ja) | 走査光学系の走査位置補正装置 | |
JP5163678B2 (ja) | ガルバノスキャナ | |
JP2003270572A (ja) | 光走査装置 | |
JP2001108864A (ja) | 光ファイバコネクタ及びその調整方法 | |
JP2001133714A (ja) | 光走査光学系 | |
KR20050017859A (ko) | 광주사장치 | |
JP3702678B2 (ja) | 光偏向装置 | |
JP2004233825A (ja) | ガルバノスキャナ及びレーザ加工機 | |
JPH0480709A (ja) | 光線走査装置 | |
JP4746922B2 (ja) | 走査装置 | |
JP2005065499A (ja) | モータ、光偏向装置、画像形成装置、及び、モータの製造方法 | |
JP3650263B2 (ja) | マルチビーム光源装置、光走査装置、デジタル複写機、及びレーザプリンタ | |
JP2000131636A (ja) | 走査光学装置 | |
JP2020197682A (ja) | 光学素子調整機構および光学素子調整方法 | |
JP2004341264A (ja) | 光ビーム走査装置 | |
JPH04352121A (ja) | 光学スキャナー | |
JP2004226480A (ja) | バーコードリーダ及びその受光センサへの集光方法 | |
JPH03194568A (ja) | レーザプリンタ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19744327 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2019567023 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20207020653 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19744327 Country of ref document: EP Kind code of ref document: A1 |