Five-dimensional laser scanning processing device and method

Patent metadata

Field	Value
Publication number	US-12420359-B2
Application number	US-202318843212-A
Country	US
Kind code	B2
Filing date	Nov 30, 2023
Priority date	May 30, 2023
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

The present invention discloses a multi-dimensional laser scanning processing device and method, which includes a horizontally arranged laser beam, a turning optical path module arranged at one end of the laser beam along a horizontal direction. The turning optical path module is used to deflect the laser beam by 90°, which is then arranged to enter a deflection module. The deflection module is used to deflect the laser beam by 90° again so that it enters the beam expansion module along the horizontal direction. The beam expansion module 4 is arranged to expand a beam radius of the laser beam to a certain multiple, which then enters the plane scanning module, and finally enters the focusing module to converge into an ideal spot. The present invention can realize the changes of focused laser beam in the XYZ space and the two inclination angles α and β of the optical axis.

First claim

What is claimed is:

1. A five-dimensional laser scanning processing device, characterized in that, comprising: a laser emitting device, a turning optical path module ( 2 ), a deflection module ( 3 ), a beam expansion module ( 4 ), a plane scanning module ( 6 ) and a focusing module ( 5 ),
wherein said laser emitting device is arranged to emit a laser beam ( 1 ), said beam expansion module ( 4 ) is arranged to expand a beam radius of the laser beam ( 1 ), which subsequently enters said plane scanning module ( 6 ), said plane scanning module ( 6 ) comprises two reflective mirrors relatively positioned at a preset angle, through a continuous deflection of said two reflective mirrors, a scanning of the laser beam in an XY plane is achieved, the laser beam passes through said plane scanning module ( 6 ) and finally enters said focusing module ( 5 ) to converge into an ideal spot;
wherein the laser beam ( 1 ) enters an interior of a housing ( 7 ) along a horizontal direction through a light hole on the housing ( 7 ), and said turning optical path module ( 2 ), said deflection module ( 3 ), said beam expansion module ( 4 ), said focusing module ( 5 ), and said plane scanning module ( 6 ) are installed inside said housing ( 7 );
said turning optical path module ( 2 ) comprises a lens housing and a reflective lens, wherein said reflective lens is placed at an angle of 45° relatively to the horizontally entering laser beam ( 1 ), said lens housing not only can install said reflective lens, but also has a function of adjusting said reflective lens by ±2°, so said lens after installation can reflect the light beam and make it vertically incident on said deflection module ( 3 );
said deflection module ( 3 ) comprises a motor connecting plate ( 31 ), a moveable offset assembly ( 32 ), a guiding rail ( 33 ), a reflective mirror housing ( 34 ), a translation plate ( 35 ), and a control motor ( 36 );
said motor connecting plate ( 31 ) is connected to said housing ( 7 ) through bolt holes and is fixed into position inside said housing ( 7 ), said guide rail ( 33 ) is fixedly installed on said motor connecting plate ( 31 ) in an X-axis direction through bearings and snap rings and is connected to said control motor ( 36 ) and said moveable offset assembly through threaded holes, a threaded hole at another end of said control motor ( 36 ) is connected to said translation plate ( 35 ), said reflective mirror housing ( 34 ) is installed on said translation plate ( 35 ), and said reflective mirror housing ( 34 ) is also installed on said guiding rail ( 33 );
said reflective mirror housing ( 34 ) of said deflection module ( 3 ) is equipped with a reflective mirror housing reflective lens placed at an angle of 45°;
said deflection module ( 32 ) comprises a rotatable motor ( 321 ), a lens housing ( 322 ), an optical wedge snap ring ( 323 ), a first optical wedge ( 324 ), a second optical wedge ( 325 ), and an optical wedge snap ring ( 326 );
said first optical wedge ( 324 ) and said second optical wedge ( 325 ) are arranged in parallel and are installed in said lens housing ( 322 ) through said optical wedge snap ring ( 322 ) and said optical wedge snap ring ( 236 ) respectively, wherein a wedge edge of said first optical wedge ( 324 ) is tangent to a wedge edge of said optical wedge snap ring ( 322 ), a wedge edge of said second optical wedge ( 325 ) is tangent to a wedge edge of said optical wedge snap ring ( 236 ), and said wedge edge of said first optical wedge ( 324 ) and said wedge edge of said second optical wedge ( 325 ) are parallel to each other; said lens housing ( 322 ) is fixed on said rotatable motor ( 321 ) and is coaxial with said rotatable motor ( 321 ), when said rotatable motor ( 321 ) rotates, said first optical wedge ( 324 ) and said second optical wedge ( 325 ) are driven to rotate, due to the characteristics of parallel double optical wedges, the passing laser beam ( 1 ) is offset along the X-axis.

2. A method of use of a five-dimensional laser scanning processing device, wherein said five-dimensional laser scanning processing device comprises: a laser emitting device, a beam expansion module ( 4 ), a plane scanning module ( 6 ) and a focusing module ( 5 ), wherein said laser emitting device is arranged to emit a laser beam ( 1 ), said beam expansion module ( 4 ) is arranged to expand a beam radius of the laser beam ( 1 ), which subsequently enters said plane scanning module ( 6 ), said plane scanning module ( 6 ) comprises two reflective mirrors relatively positioned at a preset angle, through a continuous deflection of said two reflective mirrors, a scanning of the laser beam in an XY plane is achieved, the laser beam passes through said plane scanning module ( 6 ) and finally enters said focusing module ( 5 ) to converge into an ideal spot,
characterized in that, said method comprising the steps of:
the laser beam ( 1 ) entering into an interior of said housing ( 7 ) along a direction parallel to said housing ( 7 ); entering into said deflection module ( 3 ) after a turning optical path module ( 2 ) deflects the laser beam ( 1 ) by 90°, deflecting the laser beam ( 1 ) by 90° again and entering said beam expansion module ( 4 ) in the same direction as the incident light, then entering said plane scanning module ( 6 ), and then passing through said focusing module ( 5 ) to achieve laser focusing,
keeping initial positions of other components unchanged, controlling an X reflector ( 55 ) by an X motor ( 51 ) while controlling an Y reflector ( 54 ) by an Y-motor ( 53 ) so that the laser beam entering said plane scanning module ( 6 ) realizes scanning in the X and Y planes under actions of said X reflector ( 55 ) and said Y reflector ( 54 );
wherein a change in an Z dimension mainly comes from said beam expansion module ( 4 ), by installing a spherical lens in a movable lens housing ( 49 ), as said movable lens housing ( 49 ) reciprocates along a high-precision guiding rail ( 490 ), the laser beam finally passing is converged by said focusing module ( 5 ) and caused to move up and down along the Z-axis;
wherein said movable lens housing ( 49 ) is driven by a short crank ( 47 ), a motor mounting frame ( 41 ), a long crank ( 46 ), a short crank ( 47 ), and said movable lens housing ( 49 ) form a crank sliding mechanism, said long crank ( 46 ) is driven by said driving motor to drives a large gear ( 43 ) to rotate, and drives a small gear ( 42 ) to move through gear meshing, said small gear ( 42 ) drives a gear mounting rod ( 45 ) to rotate, since said long crank ( 46 ) is installed on said gear mounting rod ( 45 ), said long crank ( 46 ) is driven simultaneously to start rotating movement;
angles α and β is regulated by a combined action of several modules, due to the effect of said turning optical path module ( 2 ) and said deflection module ( 3 ), the laser beam ( 1 ) is deflected twice after entering said turning optical path module ( 2 ), and then still enters said deflection module ( 3 ) along the Z-axis direction; the up and down movement along the X-axis of said reflective mirror housing causes the laser beam to deflect along the Z-axis by a certain amount, and then to enter into said deflection module ( 3 ); since a first optical wedge ( 324 ) and a second optical wedge ( 325 ) are placed parallel to each other, the laser beam is emitted parallel to the optical axis Z-axis; however, when a rotatable motor ( 321 ) drives said first optical wedge ( 324 ) and said second optical wedge ( 325 ) to start rotating together, the laser beam also starts to rotate around the Z-axis, and then the laser beam enters said beam expansion module ( 4 ) and said plane scanning module ( 6 ), according to the principle of deflection, said beam expansion module ( 4 ) and said plane scanning module ( 6 ) work together to produce the corresponding angles α and β of the laser beam.

3. The m

Assignees

• Univ Xi An Jiaotong

Inventors

• Zhao Wanqin
• Li Kailin
• Mei Xuesong
• Liu Bin
• Sun Zheng
• Duan Wenqiang
• Wang Wenjun
• Cui Jianlei
• Fan Zhengjie

Classifications

• B23K26/0648

  comprising lenses · CPC title

• B23K26/082 Primary

  Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title

• B23K26/702 Primary

  Auxiliary equipment · CPC title

• Y02P10/25

  Process efficiency · CPC title

• B23K26/00 Primary

  Working by laser beam, e.g. welding, cutting or boring · CPC title