WO2020076002A1 - Method for laser welding by vibrating or rotating laser beam - Google Patents
Method for laser welding by vibrating or rotating laser beam Download PDFInfo
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- WO2020076002A1 WO2020076002A1 PCT/KR2019/012815 KR2019012815W WO2020076002A1 WO 2020076002 A1 WO2020076002 A1 WO 2020076002A1 KR 2019012815 W KR2019012815 W KR 2019012815W WO 2020076002 A1 WO2020076002 A1 WO 2020076002A1
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- laser beam
- welding
- galvanometer
- data
- vibrating
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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
- B23K26/06—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
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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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
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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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/26—Seam welding of rectilinear seams
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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
- B23K26/70—Auxiliary operations or equipment
-
- 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
- B23K26/702—Auxiliary equipment
Definitions
- the present invention relates to a method of performing laser welding, and more particularly, to a method of performing laser welding by vibrating or rotating a laser beam to be welded while vibrating or rotating a ray point beam.
- a laser beam having an excellent effect in terms of cost reduction, factory automation, and quality improvement has been applied to cutting, welding, and heat treatment of metal materials in the industrial field, and several required for the application of such a laser beam Targets include uniformization of the energy distribution of the laser beam, control of laser power to maintain a constant heat treatment temperature, optimum laser beam irradiation rate to meet productivity and quality, and maximization of energy absorption. In other words, when these goals are satisfied, the effect of cost reduction and quality improvement in product development can be expected.
- a laser optical head mounted on a robot in order to obtain a laser welding quality that meets specifications, a laser optical head mounted on a robot must be irradiated with a laser beam while accurately moving along a laser welding line.
- the multi-axis robot having an arm and the arm of the multi-axis robot And a scanner having an optical system attached to the tip and having an optical system that emits a laser beam to the workpiece, the scanner comprising a preset coordinate system having an origin of the coordinate system coinciding with the intersection between the optical axis of the laser beam and a fixed element of the optical system. It has a configuration.
- the laser welding apparatus measures the object to be welded and the laser irradiation distance using a scanner and adjusts the irradiation distance of the laser beam using a multi-axis robot, there is a disadvantage of accurately measuring the laser irradiation distance using a scanner, In addition to requiring expensive scanner equipment for precise measurement, there are disadvantages that are not suitable for equipment for laser welding a to-be-welded object having a simple cylindrical structure.
- the existing laser welding apparatus is a method of laser welding while the laser beam irradiation apparatus moves along the outer periphery of the object to be welded, it is applied to the laser welding apparatus required for the laser welding line for repeatedly welding the object to be formed formed of a simple cylindrical outer periphery.
- the structure is complicated to apply, so the manufacturing cost is high and the welding work time is long, so the workability is lowered, and expensive scanning equipment is required separately.
- the welding surface must be very precisely cut and aligned for welding due to the limitation of the spot size of the laser beam by irradiating the laser beam through a fixed lens.
- the present invention was devised to solve the above problems, and the problem to be solved by the present invention is to make the laser beam into an arbitrary pattern (right angle to the welding line, rotation along the welding line, spin movement along the welding line, etc.).
- the vibration mode a method of performing laser welding by vibrating or rotating a laser beam capable of quality control through precise welding is provided.
- the present invention was created to improve the problems of the prior art as described above, and is a method of performing laser welding by vibrating a laser beam condensed on a welding line in welding a steel product line.
- a condensing lens transmission step of condensing the laser beam ;
- It comprises a; one-axis galvanometer vibration step; the one-axis galvanometer vibration step, the control algorithm for the input, storage and execution of the drive data for driving the vibration of the first galvanometer vibration. Can work through.
- the first galvanometer on which the first reflector is installed is vibrated and projected on the second reflecting mirror, and the second galvanometer on which the second reflecting mirror is installed.
- a two-axis galvanometer vibration step of welding while vibrating in at least one mode of right angle, circle, zigzag, and spin with the welding line.
- first galvanometer and the second galvanometer may be operated through a control algorithm for input, storage and execution of driving data for driving at least one of right angle, circle, zigzag and spin.
- control algorithm includes: a data storage algorithm for storing data of the first and second galvanometer operating modes; And an execution algorithm that operates the first galvanometer and the second galvanometer using data stored in the data storage algorithm.
- the data storage algorithm may select a location to store the data and store the data if there is a data value to be stored.
- the execution algorithm may load the data stored through the data storage algorithm and execute operations of the first galvanometer and the second galvanometer based on the data.
- the driving mode of the second galvanometer may be a circular shape having the same length of the xy axis.
- the driving mode of the second galvanometer may be an ellipse having different xy-axis lengths.
- the driving mode of the second galvanometer may be a straight line in which one axis of the xy axis has a length of zero.
- a method of laser welding is performed by rotating a laser beam condensed on a welding line, wherein the laser beam is irradiated to a first wedge prism through a reflector; A transmission step in which the laser beam that has first transmitted through the first wedge prism through the laser beam irradiation step is secondly transmitted through the second wedge prism; An inclination angle adjustment step of rotating the first and second wedge prisms to adjust an inclination angle of the laser beam transmitted through the first and second wedge prisms; A condenser lens irradiation step of irradiating the condensing lens with the laser beam whose inclination angle is adjusted through the inclination angle adjustment step; And a welding step in which the laser beam whose angle is adjusted through the condensing lens irradiation step is circularly welded around the welding line.
- the method of performing laser welding may be operated through a control algorithm related to input, storage and execution of drive data for driving rotation.
- control algorithm may include a data storage algorithm for selecting a location to store the data and storing the data if there is a data value to be stored; And an execution algorithm that loads the data stored through the data storage algorithm and rotates the first and second wedge prisms by the data.
- FIG. 1 is a view showing an embodiment of a conventional laser beam welding method.
- FIG. 2 is a conceptual diagram of a method of performing laser welding by vibrating or rotating a laser beam according to an embodiment of the present invention.
- FIG. 3 is a conceptual diagram showing an embodiment of a single-axis galvanometer.
- FIG. 4 is a conceptual diagram showing an embodiment of a biaxial galvanometer.
- FIG. 5 is a first conceptual view showing a state of welding by rotating a lens.
- FIG. 6 is a second conceptual diagram of FIG. 5 above.
- FIG. 7 is a view showing the apparatus for performing a method of laser welding by vibrating or rotating the laser beam.
- FIG. 10 is a flowchart of a method of laser welding by vibrating a laser beam.
- 11 is a flowchart of a method of laser welding by rotating a laser beam.
- first and second are for distinguishing one component from other components, and the scope of rights should not be limited by these terms.
- the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
- first component When a component is said to be “connected” to another component, it may be understood that other components may exist in the middle, although they may be directly connected to the other component.
- second component when a component is said to be “directly connected” to another component, it should be understood that no other component exists in the middle.
- other expressions describing the relationship between the components that is, “between” and “immediately between” or “adjacent to” and “directly neighboring to” should be interpreted similarly.
- FIG. 1 is a view showing an embodiment of a conventional laser beam welding method
- Figure 2 is a conceptual diagram of a method of laser welding by vibrating or rotating the laser beam according to an embodiment of the present invention
- Figure 3 is a single axis galvan
- Fig. 4 is a conceptual view showing an embodiment of a nommeter
- Fig. 4 is a conceptual view showing an embodiment of a biaxial galvanometer
- Fig. 5 is a first conceptual view showing a welding state by rotating a lens
- Fig. 6 is a view of Fig. 5 2 is a conceptual diagram
- FIG. 7 is a view showing apparatuses for performing a method of laser welding by vibrating or rotating the laser beam
- FIG. 8 is a flowchart of a data storage algorithm
- FIG. 9 is a flowchart of the execution algorithm
- FIG. 10 is a flowchart of a method of laser welding by vibrating the laser beam
- FIG. 11 is a flowchart of a method of laser welding by rotating the laser
- the present invention is a condensing lens transmission step (S100), a reflector irradiation step (S200), and a single axis galvanometer vibration step (S300). It can be made including.
- a laser, a beam transmission system, a welding condenser and a control device capable of vibrating or arbitrarily rotating a laser beam focused on a welding line, an auxiliary gas (shielding gas) device for welding, and a steel product to be welded
- a welding operation can be performed using a cutting device, an alignment device for welding the cut steel product, and the like.
- the condensing lens transmission step (S100) is a step of condensing the laser beam by irradiating the laser beam to the condensing lens 40.
- the reflecting mirror irradiation step (S200) is a step of irradiating the first reflecting mirror 10 installed on the first galvanometer 50 through the condensing lens transmission step (S100).
- the one-axis galvanometer vibration step (S300) vibrates the laser beam irradiated through the reflector irradiation step (S200) to the first galvanometer 50, and welds the laser beam reflected from the first reflector 10 to the welding line ( 30) This is the step of welding by adjusting the amplitude at a right angle or a set angle.
- the one-axis galvanometer vibration step (S300) may be operated through a control algorithm for input, storage and execution of driving data for driving the vibration of the first galvanometer 50.
- the welding method of the present invention may further include a biaxial galvanometer vibration step (S400).
- the laser beam passes through the condenser lens 40 and is projected onto the first reflector 10 while vibrating the first galvanometer 50 in which the first reflector 10 is installed.
- the first galvanometer 50 and the second galvanometer 60 may be operated through a control algorithm for input, storage, and execution of driving data for driving at least one of right angle, circle, zigzag, and spin. .
- the control algorithm may include a data storage algorithm and an execution algorithm.
- the data storage algorithm is a step of storing data in the operation modes of the first galvanometer 50 and the second galvanometer 60.
- a location to store the data can be selected and data can be stored (see FIG. 8).
- the execution algorithm may operate the first galvanometer 50 and the second galvanometer 60 using the data stored in the data storage algorithm.
- the execution algorithm can load the data stored through the data storage algorithm and execute the operations of the first galvanometer 50 and the second galvanometer 60 by the data (FIG. 9).
- the driving mode of the second galvanometer 60 may be a circular shape having the same length of the xy axis.
- the driving mode of the second galvanometer 60 may be an ellipse having different xy-axis lengths.
- the driving mode of the second galvanometer 60 may be a straight line in which the length of one of the xy axes is zero.
- the present invention is a laser beam irradiation step (S110), a transmission step (S210), an inclination angle adjustment step (S310), including a condensing lens irradiation step (S410) and welding step (S510).
- S110 a laser beam irradiation step
- S210 a transmission step
- S310 an inclination angle adjustment step
- S410 condensing lens irradiation step
- S510 welding step
- the laser beam irradiation step S110 is a step in which the laser beam is irradiated to the first wedge prism 100 through the reflector 10.
- the transmitting step (S210) is a step in which the laser beam that first transmits the first wedge prism 100 through the laser beam irradiation step (S110) is secondly transmitted to the second wedge prism 110.
- the tilt angle adjusting step (S310) is a step of adjusting the tilt angle of the laser beam transmitted through the first and second wedge prisms 100 and 110 by rotating the first and second wedge prisms 100 and 110.
- the condensing lens irradiation step (S410) is a step of irradiating the condensing lens 40 with the laser beam whose inclination angle is adjusted through the inclination angle adjustment step (S310).
- the welding step S510 is a step in which the laser beam whose angle is adjusted through the condensing lens irradiation step S410 is circularly welded around the welding line 30.
- the method of laser welding may be operated through a control algorithm related to input, storage and execution of drive data for driving rotation.
- the control algorithm may include a data storage algorithm and an execution algorithm.
- the data storage algorithm can select a location to store data and store the data if there is a data value to store.
- the execution algorithm may load the stored data through the data storage algorithm and rotate the first and second wedge prisms 100 and 110 by the data.
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Abstract
Description
Claims (12)
- 철강제품 라인용접에 있어서 용접선에 집광되는 레이저 빔을 진동시켜 레이저 용접을 하는 방법으로서,A method of laser welding by vibrating a laser beam focused on a welding line in welding a steel product line,상기 레이저 빔을 집광렌즈에 조사하여 상기 레이저 빔을 집광하는 집광렌즈 투과단계;A condensing lens transmission step of condensing the laser beam by irradiating the laser beam to the condensing lens;상기 집광렌즈 투과단계를 거쳐 집광된 상기 레이저 빔을 제 1갈바노미터에 설치된 제 1반사경에 조사하는 반사경 조사단계; 및A reflector irradiation step of irradiating the laser beam collected through the condensing lens transmission step to a first reflector installed in a first galvanometer; And상기 반사경 조사단계를 거쳐 조사된 상기 레이저 빔을 상기 제 1갈바노미터로 진동하여, 상기 제 1반사경에서 반사되는 상기 레이저 빔을 상기 용접선과 직각 또는 설정된 각으로 진폭을 조정하면서 조사하여 용접하는 1축 갈바노미터 진동단계;를 포함하여 이루어지고,The laser beam irradiated through the reflector irradiation step is vibrated with the first galvanometer, and the laser beam reflected from the first reflector is irradiated while adjusting the amplitude at a right angle or a set angle with the welding line to weld 1 Axial galvanometer vibration step; including,상기 1축 갈바노미터 진동단계는,The one-axis galvanometer vibration step,상기 제 1갈바노미터진동의 진동을 구동하기 위한 구동데이터의 입력, 저장 및 실행에 관한 제어 알고리즘을 통해 작동되는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.A method of performing laser welding by vibrating or rotating a laser beam, characterized in that it is operated through a control algorithm for input, storage and execution of driving data for driving vibration of the first galvanometer vibration.
- 청구항 1에 있어서,The method according to claim 1,상기 레이저 빔을 상기 집광렌즈에 통과시키고 제 1반사경에 투사하면서 상기 제 1반사경이 설치된 제 1갈바노미터를 진동하여 제 2반사경에 투사하며, 상기 제 2반사경이 설치된 제 2갈바노미터를 상기 용접선과 직각, 원형, 지그재그 및 스핀중 적어도 하나의 모드로 진동시키면서 용접하는 2 축 갈바노미터 진동단계;를 더 포함하여 이루어지는 것을 특징으로 하는 레이저빔을 진동시켜 레이저 용접을 하는 방법.While passing the laser beam through the condenser lens and projecting on the first reflector, the first galvanometer with the first reflector is vibrated and projected on the second reflector, and the second galvanometer with the second reflector is installed. A method of performing laser welding by vibrating a laser beam, characterized in that it further comprises; a biaxial galvanometer vibration step of welding while vibrating in at least one mode of a right angle, a circle, a zigzag, and a spin with a welding line.
- 청구항 2에 있어서,The method according to claim 2,상기 제 1갈바노미터와 제 2갈바노미터는The first galvanometer and the second galvanometer직각, 원형, 지그재그 및 스핀중 적어도 하나를 구동하기 위한 구동데이터의 입력, 저장 및 실행에 관한 제어 알고리즘을 통해 작동되는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.A method of performing laser welding by vibrating or rotating a laser beam, characterized in that it is operated through a control algorithm for input, storage and execution of driving data for driving at least one of right angle, circle, zigzag and spin.
- 청구항 1 또는 2에 있어서,The method according to claim 1 or 2,상기 제어 알고리즘은,The control algorithm,상기 상기 제 1갈바노미터와 상기 제 2갈바노미터 작동 모드의 데이터를 저장하는 데이터 저장 알고리즘; 및A data storage algorithm for storing data of the first galvanometer and the second galvanometer operating mode; And상기 데이터 저장 알고리즘에서 저장된 데이터를 이용하여 상기 제 1갈바노미터와 상기 제 2갈바노미터를 작동시키는 실행 알고리즘;을 포함하는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.Method of performing laser welding by vibrating or rotating a laser beam, characterized in that it comprises; an execution algorithm for operating the first galvanometer and the second galvanometer using the data stored in the data storage algorithm.
- 청구항 4에 있어서,The method according to claim 4,상기 데이터 저장 알고리즘은, 저장할 데이터 값이 있으면 상기 데이터를 저장할 위치를 선택하고 상기 데이터를 저장하는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.The data storage algorithm is a method of performing laser welding by vibrating or rotating a laser beam, characterized in that if there is a data value to be stored, a location to store the data is stored and the data is stored.
- 청구항 5에 있어서,The method according to claim 5,상기 실행 알고리즘은,The execution algorithm,상기 데이터 저장 알고리즘을 통해 저장된 상기 데이터를 로드하고 상기 데이터에 의해 상기 제 1갈바노미터와 상기 제 2갈바노미터의 작동을 실행하는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.A method of performing laser welding by vibrating or rotating a laser beam, characterized in that the data stored through the data storage algorithm is loaded and the first galvanometer and the second galvanometer are operated by the data. .
- 청구항 6에 있어서,The method according to claim 6,상기 제 2갈바노미터의 구동 모드는 xy축의 길이가 동일한 원형인 것을 특징으로 하는 레이저빔을 진동시켜 레이저 용접을 하는 방법.The driving mode of the second galvanometer is a method of performing laser welding by vibrating a laser beam, characterized in that the length of the xy axis is the same.
- 청구항 6에 있어서,The method according to claim 6,상기 제 2갈바노미터의 구동 모드는 xy축 길이가 서로 다른 타원형인 것을 특징으로 하는 레이저빔을 진동시켜 레이저 용접을 하는 방법.The driving mode of the second galvanometer is a method of performing laser welding by vibrating a laser beam, characterized in that the xy-axis lengths are different ellipses.
- 청구항 6에 있어서,The method according to claim 6,상기 제 2갈바노미터의 구동 모드는 xy축중 한축의 길이가 0인 직선형인 것을 특징으로 하는 레이저빔을 진동시켜 레이저 용접을 하는 방법.The driving mode of the second galvanometer is a method of performing laser welding by vibrating a laser beam, characterized in that the length of one axis of the xy axis is zero.
- 철강제품 라인용접에 있어서 용접선에 집광되는 레이저빔을 회전시켜 레이저 용접을 하는 방법으로서,A method of laser welding by rotating a laser beam condensed on a welding line in a steel product line welding,상기 레이저 빔이 반사경을 거쳐서 제 1웨지프리즘에 조사되는 레이저 빔 조사단계;A laser beam irradiation step in which the laser beam is irradiated to a first wedge prism through a reflector;상기 레이저 빔 조사단계를 거쳐서 상기 제 1웨지프리즘을 1차 투과한 상기 레이저 빔이 제 2웨지프리즘에 2차 투과되는 투과단계;A transmission step in which the laser beam that has first transmitted through the first wedge prism through the laser beam irradiation step is secondly transmitted through the second wedge prism;상기 제 1, 2웨지프리즘을 회전시켜서 각각의 상기 제 1, 2웨지프리즘을 투과한 상기 레이저 빔의 경사각을 조절하는 경사각 조절단계;An inclination angle adjustment step of rotating the first and second wedge prisms to adjust an inclination angle of the laser beam transmitted through the first and second wedge prisms;상기 경사각 조절단계를 통해 경사각이 조절된 상기 레이저 빔을 집광렌즈에 조사하는 집광렌즈 조사단계; 및A condensing lens irradiation step of irradiating the condensing lens with the laser beam whose inclination angle is adjusted through the tilt angle adjustment step; And상기 집광렌즈 조사단계를 거쳐서 각도가 조절된 상기 레이저 빔이 상기 용접선을 주위로 원형을 그리며 용접하는 용접단계;를 포함하여 이루어지는 것을 특징으로 하는 레이저빔을 회전시켜 레이저 용접을 하는 방법.A method of performing laser welding by rotating a laser beam, comprising: a welding step in which the laser beam whose angle is adjusted through the condensing lens irradiation step circularly welds the welding line.
- 청구항 10에 있어서,The method according to claim 10,상기 레이저 용접을 하는 방법은,The laser welding method,회전을 구동하기 위한 구동데이터의 입력, 저장 및 실행에 관한 제어 알고리즘을 통해 작동되는 것을 특징으로 하는 레이저빔을 회전시켜 레이저 용접을 하는 방법.A method of performing laser welding by rotating a laser beam, characterized in that it is operated through a control algorithm for input, storage and execution of driving data for driving rotation.
- 청구항 11에 있어서,The method according to claim 11,상기 제어 알고리즘은,The control algorithm,저장할 데이터 값이 있으면 상기 데이터를 저장할 위치를 선택하고 상기 데이터를 저장하는 데이터 저장 알고리즘; 및A data storage algorithm for selecting a location to store the data and storing the data if there is a data value to be stored; And상기 데이터 저장 알고리즘을 통해 저장된 상기 데이터를 로드하고 상기 데이터에 의해 상기 제 1, 2웨지프리즘을 회전시키는 실행 알고리즘;을 포함하는 것을 특징으로 하는 레이저빔을 진동 또는 회전시켜 레이저 용접을 하는 방법.And an execution algorithm that loads the data stored through the data storage algorithm and rotates the first and second wedge prisms by the data.
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