WO2023206880A1 - Tête de traitement laser - Google Patents

Tête de traitement laser Download PDF

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Publication number
WO2023206880A1
WO2023206880A1 PCT/CN2022/114791 CN2022114791W WO2023206880A1 WO 2023206880 A1 WO2023206880 A1 WO 2023206880A1 CN 2022114791 W CN2022114791 W CN 2022114791W WO 2023206880 A1 WO2023206880 A1 WO 2023206880A1
Authority
WO
WIPO (PCT)
Prior art keywords
focusing
laser processing
mirror
processing head
focus
Prior art date
Application number
PCT/CN2022/114791
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English (en)
Chinese (zh)
Inventor
苑凌峰
王伟
邵华江
Original Assignee
上海嘉强自动化技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 上海嘉强自动化技术有限公司 filed Critical 上海嘉强自动化技术有限公司
Publication of WO2023206880A1 publication Critical patent/WO2023206880A1/fr

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    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • 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
    • B23K26/70—Auxiliary operations or equipment

Definitions

  • the utility model relates to the technical field of laser processing, in particular to a laser processing head.
  • Laser processing technology covers a variety of laser processing techniques such as laser cutting, welding, quenching, drilling, micro-machining, etc., and utilizes the basic characteristics of the interaction between laser and matter. Due to the advantages of non-contact between laser beam and processing materials, processing speed and quality, laser processing technology is an irreplaceable high-tech.
  • high-power fiber laser laser heads on the market are generally fixed-focus processing heads, that is, the focal length of the collimator lens and the focal length of the focusing lens are often fixed.
  • the function of this type of laser processing head is relatively single, and it is gradually unable to meet the needs of more and more diverse application scenarios on the market. .
  • the laser heads currently on the market can change the focus of laser processing by replacing focusing lenses with different focal lengths, thereby achieving cutting of plates of different thicknesses.
  • this kind of laser head is still too cumbersome to use, and it must be re-adjusted every time it is replaced, which increases the workload of the staff.
  • the present utility model provides a laser processing head that can change the focal length of the laser processing focus and the size of the laser spot in real time, effectively expanding the applicable scenarios of the laser processing head of the utility model and improving the laser processing efficiency of the utility model.
  • the processing effect of the head is a laser processing head that can change the focal length of the laser processing focus and the size of the laser spot in real time, effectively expanding the applicable scenarios of the laser processing head of the utility model and improving the laser processing efficiency of the utility model.
  • the utility model provides a laser processing head.
  • the laser processing head includes: an optical fiber interface device, a main body device, a focusing and zooming device, a camera device and a focusing device, wherein the optical fiber interface device, the focusing device
  • the zoom device, the camera device and the focusing device are all connected to the main body device;
  • the focusing and zooming device includes a focusing compensation lens and a zoom lens;
  • the camera device includes a beam combiner device and a camera Component;
  • the main body device includes a fixed mirror;
  • the optical fiber interface device, the focusing compensation mirror, the variable magnification lens, the fixed mirror, the beam combiner device and the focusing device are arranged in a straight line.
  • a laser processing light path is formed; the camera component is disposed on the side of the laser processing light path; the camera component, the beam combiner device and the focusing device form a camera observation light path; the focus compensation mirror, the The distance from the variable magnification mirror to the optical fiber interface device is variable.
  • the focusing and zooming device further includes a moving guide rail, the moving guide rail is parallel to the laser processing optical path, and the focusing compensation mirror and the zooming lens can both move along the moving guide rail. sports.
  • the focus-adjusting zoom device further includes a focus-adjusting compensation lens holder and a first drive motor.
  • the focus-adjusting compensation lens holder is used to install the focus-adjusting compensation lens.
  • the first drive motor has a The first movable end is connected to the focus compensation lens holder, and the first movable end is connected to the motion guide rail and moves along it.
  • the focusing and zooming device further includes a zoom lens base and a second driving motor.
  • the zoom lens base is used to install the zoom lens.
  • the second driving motor has a second movable end, the second movable end is connected to the zoom lens holder, the second movable end is connected to the motion guide rail and moves along it.
  • the focus-variable magnification device further includes a focus-limiting component for limiting the adjustment range of the focus-adjusting compensation mirror, and a zoom limiter for limiting the adjustment range of the variable-magnification lens. bit component.
  • the number of the focusing limiting components is one or more, and the number of the variable magnification limiting components is one or more; the focusing limiting components and the variable magnification limiting components are limiters. Stop or limit sensor.
  • the laser processing head further includes an upper protective mirror device and/or a lower protective mirror device.
  • the upper protective mirror device is located between the optical fiber interface device and the focusing and zooming device.
  • the lower protective mirror device is located on the side of the focusing device away from the optical fiber interface device.
  • the upper protective mirror device and/or the lower protective mirror device are pluggably connected with adjacent components thereof.
  • the laser processing head further includes a control module capable of controlling the distance between the focusing compensation mirror and the variable power lens and the optical fiber interface device.
  • the laser processing head further includes a processing function module, which is detachably connected to a side of the focusing device away from the optical fiber interface device.
  • the laser processing head of the present invention by setting the distance between the focusing compensation mirror, the variable power lens and the optical fiber interface device to be variable, the laser processing head of the present invention can zoom and adjust the laser spot in real time.
  • the size can be adjusted so that the best spot focus combination can be selected according to the material properties of different processing objects and application scenarios.
  • the operator by setting up a camera device, the operator can dynamically observe the processing status of the processing object in real time, improving the operator's experience.
  • Figure 1 is a schematic diagram of the laser processing head of the present utility model in some embodiments.
  • Figure 2 is a schematic structural diagram of the laser processing head of the present utility model in some embodiments.
  • Figure 3 is an exploded view of the focus and zoom device of the laser processing head of the present invention in some embodiments
  • Figure 4 is an exploded view of the main body device of the laser processing head of the present invention in some embodiments.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
  • connection In this utility model, unless otherwise expressly stipulated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements, unless otherwise Clear limits.
  • connection or integration
  • connection can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium
  • it can be an internal connection between two elements or an interaction between two elements, unless otherwise Clear limits.
  • specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • the first feature "on” or “below” the second feature may be that the first and second features are in direct contact, or the first and second features are in direct contact through an intermediate medium. indirect contact.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature “below”, “below” and “under” the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • Figure 1 shows a schematic diagram of a laser processing head in an embodiment of the present invention.
  • Figure 2 shows a schematic structural diagram of the laser processing head in Figure 1.
  • An embodiment of the present invention provides The laser processing head includes an optical fiber interface device 1, a main body device 2, a focus and zoom device 3, a camera device 4 and a focusing device 5.
  • the fiber interface device 1, the focus and zoom device 3, the camera device 4 and the focusing device 5 are all A direct or indirect connection is formed with the main body device 2 .
  • Figure 3 is an exploded schematic diagram of the focus and zoom device 3.
  • Figure 4 is a schematic structural diagram of the main body device 2.
  • the focus and zoom device 3 includes a focus compensation lens 309 and a zoom lens 315.
  • the main body Device 2 includes a fixed mirror 205; camera device 4 includes a beam combiner device and a camera assembly (not shown in the figure); fiber interface device 1, focus compensation mirror 309, variable magnification lens 315, fixed mirror 205, the beam combiner
  • the mirror device and the focusing device 5 are arranged in a straight line and sequentially to form a laser processing optical path; the camera component is arranged on the side of the laser processing optical path, and the camera component, the beam combiner device and the focusing device 5 form a camera observation optical path;
  • the distances from the focus compensation mirror 309 and the variable magnification mirror 315 to the optical fiber interface device 1 are variable.
  • the optical fiber interface device 1 is used to connect an external laser to provide a laser light source. After the laser passes through the focusing compensation mirror 309, its focal length, that is, the processing position, can be adjusted, and then its focal length, that is, the processing position, can be adjusted through the zoom lens 315. The size of the light spot at the processing position is finally determined by its focal length and light spot after passing through the fixed mirror 205. The laser then passes directly through the beam combiner device, and after being converged by the focusing device 5, laser processing can be performed. At the same time, the optical fiber of the laser processing object passes through the focusing device 5 and is reflected by the beam combiner device and enters the camera assembly, so that the operator can observe the condition of the laser processing object in real time.
  • the laser processing head of the present invention by setting the distance between the focusing compensation mirror, the variable power lens and the optical fiber interface device to be variable, the laser processing head of the present invention can zoom and adjust the laser spot in real time.
  • the size can be adjusted so that the best spot focus combination can be selected according to the material properties of different processing objects and application scenarios.
  • the operator by setting up a camera device, the operator can dynamically observe the processing status of the processing object in real time, improving the operator's experience.
  • the focus and zoom device 3 also includes a motion guide rail 304, which is parallel to the laser processing optical path.
  • the focus compensation mirror 309 and the zoom lens 315 can both move along the motion guide rail 304.
  • the focus and zoom device 3 includes a focus and zoom body 303 and a body cover 305.
  • the focus and zoom body 303 is a box with one side open, and the body cover 305 covers the focus and zoom body 303.
  • a focus and zoom cavity is formed on the zoom body 303 .
  • the body cover 305 is connected to the main body device 2 .
  • the motion guide rail 304 is disposed in the focus and zoom body 303.
  • the body cover 305 is provided with a slot corresponding to the motion guide rail 304.
  • the focus compensation mirror 309 and the zoom lens 315 are disposed outside the focus and zoom chamber and located on the host computer. In the body device 2, it is connected to the motion guide rail 304 through the slot.
  • the laser processing head of the present invention is not limited to how the focus compensation mirror 309 and the variable power mirror 315 move along the movement guide rail 304 .
  • the focus zoom device 3 also includes a focus compensation lens holder 308 and a first drive motor 3131.
  • the focus compensation lens holder 308 is used to install the focus compensation lens 309.
  • the driving motor 3131 has a first movable end.
  • the first movable end is connected to the focus compensation lens holder 309.
  • the first movable end is connected to the motion guide rail 304 and moves along it. In this way, through the action of the first movable end of the first driving motor 3131, the focus compensation mirror 309 on the focus compensation lens holder 308 can be driven to move along the motion guide rail 304.
  • the first movable end can be a ball screw structure.
  • the screw in the ball screw is drivingly connected to the output end of the first drive motor 3131.
  • the screw is parallel to the motion guide rail 304.
  • the motion in the ball screw in the motion guide rail is
  • the connecting block 306 is slidingly connected to the motion guide rail 304.
  • the first driving motor 3131 rotates the driving screw, and by controlling the rotation direction of the output end of the first driving motor 3131, the moving connection block 306 can slide back and forth along the moving guide rail 304, thereby driving the focus compensation lens holder 308.
  • the focus compensation mirror 309 moves along the motion guide rail 304 to adjust the distance between the focus compensation mirror 309 and the optical fiber interface device 1 to change the focus of laser processing.
  • the focus and zoom device 3 also includes a zoom lens base 314 and a second drive motor 3132.
  • the zoom lens base 314 is used to install the zoom lens 315.
  • the second drive motor 3132 has a second movable end.
  • the third drive motor 3132 has a second movable end.
  • the two movable ends are connected to the zoom lens base 314, and the second movable end is connected to the motion guide rail 304 and moves along it.
  • the second movable end may also be a ball screw structure.
  • the motion connection block 306 driven by the second drive motor 3132 is connected to the zoom lens base 314 and the motion guide rail 304 respectively.
  • the second driving motor 3132 can drive the variable magnification lens 315 to move along the motion guide 304 to adjust the distance between the variable magnification lens 315 and the optical fiber interface device 1 and change the size of the laser spot.
  • the moving connection block 306 is also provided with an anti-collision block 3061 , which is used to prevent interference and collision between the moving connection block 306 and the drive variable magnification body 303 or other components.
  • the focus zoom device 3 further includes a focus limiter component for limiting the adjustment range of the focus compensation mirror 309 , and a zoom limiter component for limiting the adjustment range of the zoom lens 315 .
  • the focus limiter component and the zoom limiter component can ensure that the focus compensation mirror 309 and the zoom lens 315 are adjusted within a suitable range. On the one hand, they avoid the focus compensation mirror 309 and the zoom lens 315 from interfering with other components. Interference of device components affects the stability of the laser processing head of the present invention.
  • the effective adjustment range of the focusing compensation mirror 309 and the variable magnification mirror 315 can also be optimized to improve the processing performance of the laser processing head of the present invention. Performance.
  • the number of focus limiting components and variable magnification limiting components can also be set to one or more.
  • two focusing limit components and two variable magnification limit components are added, and the two focus limiting components, the variable magnification limit components
  • the limiting components are respectively arranged at both ends of the respective ball screws.
  • One of the limit stops 312 of the two focusing limit components and the variable magnification limit component limits the movement of the focusing limit component and the variable magnification limit component through physical blocking.
  • the other is a limit sensor 311.
  • the moving connection block 306 is provided with a sensing piece 3110.
  • the limit sensor 311 can detect the sensing piece 3110.
  • the limit sensors 311 used for the focus limit and zoom limit are respectively connected to the first drive motor 3131 and the second drive motor 3132, so that when the respective motion connection blocks 306 move to the extreme position, the corresponding first drive motor 313 is stopped. Drive the motor 3131 or the second drive motor 3132 to ensure that the focus compensation mirror 309 and the variable power mirror 315 adjust their distance from the optical fiber interface device 1 within a limited range.
  • the laser processing head further includes an upper protective mirror device and/or a lower protective mirror 6.
  • the main body device 2 includes a main frame 201
  • the upper protective mirror device includes an upper protective mirror 202 , an upper protective mirror base 204 and an upper protective mirror housing 203 .
  • the upper protective mirror 202 is arranged on the upper protective mirror holder 204.
  • the upper protective mirror holder 204 is arranged in the upper protective mirror casing 203.
  • the upper protective mirror casing 203 is connected to the top of the main frame 201 and is located between the optical fiber interface device 1 and the host computer. between body device 2.
  • the installation method of the lower protective mirror 6 is similar to that of the upper protective mirror 202.
  • the lower protective mirror 6 is installed on the lower protective mirror holder, and the lower protective mirror holder is arranged in the lower protective mirror casing.
  • the lower protective mirror housing is connected to the side of the focusing device 5 away from the optical fiber interface device 1 .
  • the upper protective mirror device and/or the lower protective mirror device 6 are pluggably connected with its adjacent components, so that they can be quickly replaced and ensure good laser processing effects.
  • the main body device 2 also includes a fixed mirror base 206 and a fixed mirror housing 207.
  • the fixed mirror 205 is installed on the fixed mirror base 206.
  • the fixed mirror base 206 is installed on the fixed mirror base.
  • the fixed mirror housing 207 is connected to the bottom end of the main frame 201.
  • the beam combiner device in the camera device 4 is connected below the fixed mirror housing 207 , and the camera assembly in the camera device 4 is disposed on the side of the beam combiner device.
  • the focusing device 5 includes a focusing lens and a focusing lens base, and the focusing lens is installed on the focusing lens base.
  • the focusing lens base can move on a plane perpendicular to the laser processing optical path.
  • the focusing device 5 also includes a focusing upper cover, a focusing housing, a focusing elastic pressing ring, a focusing dust cover, an adjusting ball plunger, and an adjusting tension spring; the focusing upper cover and the beam combining mirror
  • the device is connected and below it, the focusing housing is fixed below the focusing upper cover, and the focusing dust cover is connected below the focusing housing.
  • the focusing lens holder is arranged in the focusing housing and connected to the focusing dust-proof cover.
  • the focusing lens is fixed in the focusing lens holder by the focusing elastic pressing ring.
  • the adjusting ball plunger is installed on the focusing dust-proof cover, and the adjusting tension spring is connected between the focusing dust-proof cover and the focusing lens holder.
  • the focusing lens holder relies on the adjusting The ball plunger can be adjusted to move in the XY horizontal direction.
  • the laser processing head also includes a control module 301.
  • the control module 301 can control the focusing compensation mirror 309 and the variable power mirror 315 and the optical fiber interface device. 1 distance.
  • the laser processing head of the present invention also includes a control module housing 302 connected to the focus and zoom body 303, and the control module 301 is installed in the control module housing 302.
  • the control module 301 is connected to the first drive motor 3131 and the second drive motor 3132 in the focus and zoom device respectively, thereby realizing the control between the focus compensation mirror 309 and the zoom lens 315 and the optical fiber interface device 1 Distance control.
  • the laser processing head of the present invention also includes a processing function module 7.
  • the processing function module 7 is detachably connected to the focusing device 5 and away from the optical fiber interface device. 1 side.
  • the processing function module 7 can be a cladding nozzle device.
  • the laser processing head of the present invention may not be provided with the processing function module 7, but may be provided with an air knife protection device, that is, the air knife protection device is installed on the focusing device 5 away from the focusing device 5.
  • One side of the optical fiber interface device 1 is used to prevent the smoke generated during laser processing from contaminating each optical element in the laser processing head.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

Tête de traitement laser, comprenant : un appareil d'interface de fibre optique (1), un appareil de corps principal (2), un appareil de réglage de distance focale et de variation de grossissement (3), un appareil de prise de vues (4) et un appareil de focalisation (5), l'appareil d'interface de fibre optique (1), l'appareil de réglage de distance focale et de variation de grossissement (3), l'appareil de prise de vues (4) et l'appareil de focalisation (5) étant tous reliés à l'appareil de corps principal (2). L'appareil de réglage de distance focale et de variation de grossissement (3) comprend une lentille de compensation de réglage de longueur focale (309) et une lentille à grossissement variable (315). L'appareil de caméra (4) comprend un appareil combineur de faisceaux et un ensemble caméra. L'appareil de corps principal (2) comprend une lentille fixe (205). L'appareil d'interface de fibre optique (1), la lentille de compensation de réglage de longueur focale (309), la lentille à grossissement variable (315), la lentille fixe (205), l'appareil combineur de faisceaux et l'appareil de focalisation (5) sont agencés séquentiellement en ligne droite pour former un trajet de lumière de traitement laser. L'ensemble appareil de prise de vues est disposé sur une partie latérale du trajet de lumière de traitement laser, l'ensemble appareil de prise de vues, l'appareil combineur de faisceaux et l'appareil de focalisation (5) formant un trajet de lumière d'observation de caméra. Les distances entre la lentille de compensation de réglage de longueur focale (309) et l'appareil d'interface de fibre optique (1) et entre la lentille à grossissement variable (315) et l'appareil d'interface de fibre optique (1) sont variables.
PCT/CN2022/114791 2022-04-26 2022-08-25 Tête de traitement laser WO2023206880A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202220980235.1 2022-04-26
CN202220980235.1U CN217253588U (zh) 2022-04-26 2022-04-26 激光加工头

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN217253588U (zh) * 2022-04-26 2022-08-23 上海嘉强自动化技术有限公司 激光加工头

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CN111496375A (zh) * 2020-05-27 2020-08-07 岗春激光科技（江苏）有限公司 一种用于切割的激光加工头
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CN111736329A (zh) * 2020-07-10 2020-10-02 上海嘉强自动化技术有限公司 一种双片式非球面镜zoom光学系统
CN211889436U (zh) * 2019-09-29 2020-11-10 武汉兴弘光电技术有限公司 一种光束摇摆型激光焊接头
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010125510A (ja) * 2008-11-28 2010-06-10 Sunx Ltd レーザ加工装置
CN202267810U (zh) * 2011-09-28 2012-06-06 福建福光数码科技有限公司 红外照明变焦距聚光镜头
CN207642503U (zh) * 2017-11-30 2018-07-24 苏州迅镭激光科技有限公司 一种光学放大倍率可调的激光切割系统
CN109884801A (zh) * 2018-12-31 2019-06-14 苏州大学 连续变焦激光整形系统
CN211889436U (zh) * 2019-09-29 2020-11-10 武汉兴弘光电技术有限公司 一种光束摇摆型激光焊接头
CN111496375A (zh) * 2020-05-27 2020-08-07 岗春激光科技（江苏）有限公司 一种用于切割的激光加工头
CN111515535A (zh) * 2020-05-27 2020-08-11 岗春激光科技（江苏）有限公司 一种同轴吹气激光加工头
CN111531275A (zh) * 2020-05-27 2020-08-14 岗春激光科技（江苏）有限公司 一种多功能激光加工头
CN111736329A (zh) * 2020-07-10 2020-10-02 上海嘉强自动化技术有限公司 一种双片式非球面镜zoom光学系统
CN217253588U (zh) * 2022-04-26 2022-08-23 上海嘉强自动化技术有限公司 激光加工头

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