LU504263B1

LU504263B1 - Double-beam laser polishing device and polishing method for aluminum alloy

Info

Publication number: LU504263B1
Application number: LU504263A
Authority: LU
Inventors: Haibing Xiao
Original assignee: Shenzhen Inst Information Tech
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-11-30

Abstract

The application provides a double-beam laser polishing device and a polishing method for aluminum alloy, which includes a frame (10), a rotary workbench (20), arranged on the frame and an optical path system (30). The optical path system (30) includes a first fiber laser (31), a second fiber laser (32), a first three-dimensional galvanometer (33) and a second three-dimensional galvanometer (34). The first three-dimensional galvanometer (33) is connected with the first fiber laser (31) through optical fiber, and the second three-dimensional galvanometer (34) is connected with the second fiber laser (32) through optical fiber. The first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) are arranged side by side above the rotary workbench (20) in the horizontal direction. According to the double-beam laser polishing device and the polishing method for aluminum alloy provided by the application, cracks in aluminum alloy laser polishing is effectively controlled.

Description

DESCRIPTION LU504263

DOUBLE-BEAM LASER POLISHING DEVICE AND POLISHING METHOD FOR

ALUMINUM ALLOY

TECHNICAL FIELD

The application relates to the technical field of surface treatment, in particular to a double-beam laser polishing device and a polishing method for an aluminum alloy.

BACKGROUND

The statements herein only provide background information related to the present application and do not necessarily constitute prior art.

Aluminum alloy is an alloy material based on metallic aluminum and added with a certain amount of other alloying elements, which belongs to a kind of light metal material.

Because aluminum alloy has light weight and high strength, its strength is close to that of high alloy steel, and it is widely used as a structural material in aerospace, aviation, transportation, construction, motor, light industry and daily necessities.

However, after aluminum alloy and other aluminum products are processed and left for a period of time, the surface of aluminum products will be oxidized when it comes into contact with oxygen, forming a black dense oxide film, which will lead to the low surface finish of aluminum products and affect the use experience and beauty of aluminum products.

SUMMARY LU504263

One objective of embodiments is to provide a double-beam laser polishing device, aiming at solving problems that of how to modify the surface of an aluminum alloy or aluminum product when the surface of aluminum alloy or aluminum product is polished, as to keep the surface smoothness of aluminum product, avoid forming oxide film and improve the use experience of aluminum product in order to solve above technical problems, present application provides following technical schemes in the embodiments.

According to a first aspect of the application, there is provided a double-beam laser polishing device for aluminum alloy, including a frame, a rotary workbench arranged on the frame and an optical path system, where the rotary workbench is used for bearing workpieces.

The optical path system includes a first fiber laser, a second fiber laser, a first three-dimensional galvanometer and a second three-dimensional galvanometer; the first three-dimensional galvanometer is connected with the first fiber laser through an optical fiber, and the second three-dimensional galvanometer is connected with the second fiber laser through an optical fiber; the first three-dimensional galvanometer and the second three-dimensional galvanometer are arranged side by side above the rotary workbench in the horizontal direction; the first fiber laser and the second fiber laser emit laser beams with different powers and have different laser scanning paths.

In an embodiment, a first diffractive optical element tuner is arranged in the first three-dimensional galvanometer, and a second diffractive optical element tuner is arranged in the second three-dimensional galvanometer, and the light spot diameter after the laser beam is converted by the first diffractive optical element tuner is larger than that after the laser beam is converted by the second diffractive optical element tuner.

In an embodiment, the laser polishing device further includes a gas path systekt504263 arranged on the frame, and the gas path system includes a gas storage tank and an inert gas sealed cabin, where the gas storage tank is communicated with the inert gas sealed cabin each other through air delivery pipe, and the inert gas sealed cabin is arranged on the rotary workbench, the gas path system is used to provide inert gas for the surface of the workpieces.

In an embodiment, the laser polishing device further includes a focal length adjusting mechanism arranged on the frame, and the first three-dimensional galvanometer and the second three-dimensional galvanometer are arranged on the focal length adjusting mechanism, and the focal length adjusting mechanism is able to drive the first three-dimensional galvanometer and the second three-dimensional galvanometer to approach or leave the rotary workbench so as to adjust the focal length of the laser beam focused on the workpieces.

In an embodiment, the focal length adjusting mechanism includes an upright post and a driving piece arranged on the upright post, the upright post is fixedly connected with the frame, and the driving piece is movably arranged on the upright post and is able to move along the height direction of the upright post.

In an embodiment, the laser polishing device further includes a controller, and the controller is arranged on the frame, the controller is in electrical signal connection with the first fiber laser, the second fiber laser, the first three-dimensional galvanometer, the second three-dimensional galvanometer and the rotary workbench respectively, and the controller is used for controlling scanning path of the first three-dimensional galvanometer according to the received first polishing path and controlling scanning path of the second three-dimensional galvanometer according to the received second polishing path.

In an embodiment, the laser polishing device further includes a display, the display is arranged at one side of the frame and is respectively in electrical signal connection with the first fiber laser, the second fiber laser and the first three-dimensional galvanometer, the second three-dimensional galvanometer and rotary workbench.

In an embodiment, the rotary workbench is provided with an energy field generatdrU504263 the energy field generator is able to load an energy field for the workpieces.

According to a second aspect of the present application, a double-beam laser polishing method for aluminum alloy is provided and used in the laser polishing device for aluminum alloy in any one of embodiments of the first aspect of the application. The double-beam laser polishing method for aluminum alloy includes following steps: workpieces are mounted on the rotary workbench; the controller obtains the machining scanning trajectory, and plans the scanning paths of the first three-dimensional galvanometer and the second three-dimensional galvanometer in combination with the analog signals of the inclination sensor, the position sensor and the electronic pressure regulating valve sent by the first three-dimensional galvanometer and the second three-dimensional galvanometer; the controller sends control signals to the first three-dimensional galvanometer and the second three-dimensional galvanometer to control the first three-dimensional galvanometer and the second three-dimensional galvanometer to emit the laser beam and scan and polish the workpieces according to the scanning paths of the first three-dimensional galvanometer and the second three-dimensional galvanometer respectively.

In an embodiment, the scanning paths of the first three-dimensional galvanometer and the second three-dimensional galvanometer are different.

In an embodiment, the diameter of the light spot formed by the first three-dimensional galvanometer is larger than that of the light spot formed by the second three-dimensional galvanometer.

According to the embodiments of the application, the double-beam laser polishing device for aluminum alloy has following benefits: the first fiber laser and second fiber laser capable of emitting different powers are arranged on a frame, the first fiber laser is connected with a first three-dimensional galvanometer through an optical fiber, and the second fiber laser is connected with a second three-dimensional galvanometer through an optical fiber, and the scanning paths of the first three-dimensional galvanometer and the second three-dimensional galvanometer are set to be different. In this way, the laser emitted by the first fiber laser is able to roughly polish the surface of aluminum alldy504263 products through the first three-dimensional galvanometer, and the laser emitted by the second fiber laser is able to finely polish the surface of aluminum alloy products through the second three-dimensional galvanometer, so as to quickly realize "peak melting and valley filling", which reduces the secondary roughness caused by the polishing of the first fiber laser. Through the interaction between lasers with different powers and aluminum product materials, the grain size and structure of the surface of aluminum product or aluminum alloy workpieces can be changed, thereby modifying the surface of aluminum product workpieces. Compared with the prior art, the application can avoid the oxidation of the surface of aluminum products to form oxide films, and can effectively control the laser polishing cracks of aluminum alloys. The surface smoothness and surface mechanical properties of aluminum products or aluminum alloy products are improved.

The structure of this application, as well as its other objects and beneficial effects, will be described in detail with reference to the attached drawings, so as to ensure that the description of the preferred embodiment is more obvious and easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

In order to explain the technical schemes of the embodiments of the present application more clearly, the drawings needed in the description of embodiments or exemplary technology will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For ordinary people in the field, other drawings may be obtained according to these drawings without paying creative labor.

FIG. 1 is a schematic view of the overall structure of a double-beam laser polishing device for aluminum alloy provided by an embodiment of the first aspect of the application;

FIG. 2 is a front view of a double-beam laser polishing device for aluminum alloy provided by an embodiment of the first aspect of the application;

FIG. 3 is a right-side view of the double-beam laser polishing device for aluminuh¥/504263 alloy provided by the embodiment of the first aspect of the present application;

FIG. 4 is a schematic diagram of the internal structure of the first three-dimensional galvanometer;

FIG. 5 is a scanning path diagram of a first three-dimensional galvanometer and a second three-dimensional galvanometer;

FIG. 6 is a partial enlarged view at A in FIG. 5;

FIG. 7 is a detailed scanning path diagram of the first three-dimensional galvanometer and the second three-dimensional galvanometer;

FIG. 8 is a flow chart of the implementation of the double-beam laser polishing method for aluminum alloy provided by the embodiment of the second aspect of the application.

DESCRIPTION OF THE INVENTION

In order to make the purpose, technical schemes and advantages of this application clearer, the application will be further described in detail with the attached drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and are not used to limit the application.

It should be noted that when a component is said to be "fixed" or "disposed" on another component, it can be directly or indirectly on another component. When a component is said to be "connected" to another component, it can be directly or indirectly connected to the other component. The azimuth or positional relationship indicated by the terms "upper", "lower", "left" and "right" is based on the azimuth or positional relationship shown in the attached drawings, and is only for the convenience of description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of this application. For those skilled in the field, the specific meanings of the above terms can be understood according to specific situations. The terms "first" and "second" are only used for convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating tHé/504263 number of technical features. The meaning of "plural" is two or more, unless otherwise specifically defined.

According to an embodiment of the first aspect of the application, reference is made to Figs. 1- 3, in which FIG. 1 is a schematic diagram of the overall structure of a double-beam laser polishing device for aluminum alloy provided by the embodiment of the first aspect of the application, FIG. 2 is a front view of the double-beam laser polishing device for aluminum alloy provided by the embodiment of the first aspect of the application, and FIG. 3 is a right view of the double-beam laser polishing device for aluminum alloy provided by the embodiment of the first aspect of the application. A double-beam laser polishing device for aluminum alloy is provided in this embodiment, including a frame 10, a rotary workbench 20 arranged on the frame 10 and an optical path system 30, where the rotary workbench 20 is used for bearing a workpieces.

Optionally, in the embodiment of the present application, the frame 10 may be made of aluminum alloy, stainless steel or other alloy or metal materials.

The rotary workbench20 may be made of the same material as the frame 10. In some possible examples, the material of the rotary workbench20 may be different from that of the frame 10, for example, the rotary workbench20 is made of granite, marble or ceramic materials.

It can be understood that in the embodiment of the present application, the rotary workbench20 can be rotatably connected with the frame 10, for example, the rotary workbench20 and the frame 10 can be rotatably connected through a rotating shaft and a bearing.

It is easy for those skilled in the art to know that in order to drive the rotary workbench20 to rotate, the embodiment of the present application, a driving device, such as a synchronous motor, a servo motor or a stepping motor, can be arranged on the frame 10 to drive the rotary workbench.

It can be understood that a fixture, such as a three-gripper chuck or a four-gripper chuck, can be arranged on the rotary workbench20 to clamp the workpieces. In some possible examples, the fixture can also be an electrically controlled permanent magnet504263 chuck.

The optical path system 30 includes a first fiber laser 31, a second fiber laser 32, a first three-dimensional galvanometer 33 and a second three-dimensional galvanometer 34. The first three-dimensional galvanometer 33 is connected with the first fiber laser 31 through an optical fiber, and the second three-dimensional galvanometer 34 is connected with the second fiber laser 32 through an optical fiber; the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 are arranged side by side above the rotary workbench 20 in the horizontal direction; the first fiber laser 31 and the second fiber laser 32 can emit laser beams with different powers and have different laser scanning paths.

Optionally, in the embodiment of this application, the first fiber laser 31 is a continuous fiber laser, which can generate a continuous laser with a power of 300-1000W (watt), and the second fiber laser 32 is a pulse laser, which can generate a pulsed laser with a power of 40-60 W.

Among them, the first three-dimensional galvanometer 33 can convert the continuous laser generated by the first fiber laser 31 into a flat-topped spot, so that the laser has a uniform energy distribution over the entire spot area of the flat-topped spot, and its diameter is large. By controlling the energy density, irradiation time and action area of the laser, a certain preheating effect can be achieved, so that the surface temperature of aluminum alloy products or aluminum products is slightly lower than the melting point temperature, and the effects of preheating and rough polishing can be achieved.

Accordingly, the second three-dimensional galvanometer34 can convert the pulsed laser provided by the second fiber laser 32 into a flat-topped spot, the diameter of which is smaller than that of the light spot converted by the first three-dimensional galvanometer33, so that the concentrated pulse peak energy can be obtained, and the laser energy can be higher in a small local area, which can quickly melt the micro-surface peaks of the irregular curved surface, so that the molten material can quickly fill the valleys, that is, "peak melting and valley filling ", thereby reducing tH&/504263 surface roughness of the workpieces.

In addition, in the embodiment of the application, the scanning paths of the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 are set to be different, so that the pulsed laser can more effectively reduce the secondary roughness generated by the continuous laser, and the surface of the aluminum product workpieces is modified through the interaction between the laser with different powers, so that a passivation layer can be formed on the surface of the aluminum product, and oxide films can be prevented from being formed on the surface of the aluminum product, so that the surface smoothness of the aluminum product or aluminum alloy product is effectively improved, and the user experience is improved.

In the embodiment of the application, two first fiber lasers 31 and second fiber lasers 32 which can emit different powers are arranged on the frame 10, the first fiber laser 31 is connected with the first three-dimensional galvanometer 33 through optical fiber, and the second fiber laser 32 is connected with the second three-dimensional galvanometer 34 through optical fiber, and the scanning paths of the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 are set to be different. In this way, the laser emitted by the first fiber laser 31 can roughly polish the surface of aluminum alloy products through the first three-dimensional galvanometer 33, and the laser emitted by the second fiber laser 32 can finely polish the surface of aluminum alloy products through the second three-dimensional galvanometer 34, so that "peak melting and valley filling" can be quickly realized, and the secondary roughness generated by polishing by the first fiber laser 31 can be reduced. Through the interaction between lasers with different powers and aluminum product materials, the grain size and structure of the surface of aluminum products or aluminum alloy workpieces can be changed. Compared with the prior art, the application can avoid the oxidation of the surface of aluminum products to form oxide films, and can effectively control the laser polishing cracks of aluminum alloys; the surface smoothness and surface mechanical properties of aluminum products or aluminum alloy products are improved.

Optionally, withe reference to FIG. 4, FIG. 4 is a schematic diagram of the internaV504263 structure of the first three-dimensional galvanometer. A first diffractive optical element tuner 331 is arranged in the first three-dimensional galvanometer 33, and a second diffractive optical element tuner is arranged in the second three-dimensional galvanometer 34, and the light spot diameter after the laser beam is converted by the first diffractive optical element tuner 331 is larger than that after the laser beam is converted by the second diffractive optical element tuner.

It should be noted that this application only takes the internal structure of the first three-dimensional galvanometer 33 as an example, and it can be understood that the internal structure of the second three-dimensional galvanometer 34 may be the same as that of the first three-dimensional galvanometer 33.

A Diffractive Optical Element Tuner (DOE) 331 can be installed in the first three-dimensional galvanometer 33 to convert Gaussian laser, and a flat-topped spot can be formed after moving the lens and focusing the lens in the Z axis. Similarly, a DOE converter may be provided in the second three-dimensional galvanometer 34 to convert

Gaussian laser. It can be understood that the diameter of the flat-topped spot converted by the DOE converter in the second three-dimensional galvanometer 34 is smaller than that of the flat-topped spot converted by the DOE converter in the first three-dimensional galvanometer 33.

In this way, the concentrated pulse peak energy can be obtained, and the higher laser energy can be obtained in a small local area, so that the micro-surface peaks of special-shaped curved surfaces can be quickly melted, and the melted materials can be quickly filled into the valleys, that is, "peak melting and valley filling", so that the surface roughness of the workpieces can be reduced.

Optionally, with reference to FIG. 1 and FIG. 2, in this embodiment, the double-beam laser polishing device for aluminum alloy further includes an gas path system 40 arranged on the frame 10, and the gas path system 40 includes a gas storage tank 41 and an inert gas sealed cabin 42, where the gas storage tank 41 is communicated with the inert gas sealed cabin 42 each other through air delivery pipe,

and the inert gas sealed cabin 42 is arranged on the rotary workbench 20, the gas patt/504263 system 40 is used to provide inert gas for the surface of the workpieces.

Optionally, in this embodiment, the gas storage tank 41 can be a pressurized gas storage tank, and inert gases such as nitrogen, helium, xenon or argon can be stored in the gas storage tank 41.

In practical use, the workpieces can be placed in the inert gas sealed cabin 42, and inert gas is introduced into the inert gas sealed cabin 42, so that the polishing process can be carried out in an inert gas atmosphere, which can effectively avoid the oxidation of the surface of the workpieces during the polishing process and effectively improve the surface smoothness of the aluminum alloy workpieces.

The gas storage tank 41 can be fixed on the frame 10 by bolts, screws or screw rods, and similarly, the inert gas sealed cabin 42 can also be fixed on the rotary workbench20 and rotate together with the rotary workbench20.

Optionally, as shown in Figs. 1 and 2, in this embodiment of the application, double-beam laser polishing device for aluminum alloy further includes a focal length adjusting mechanism 50 arranged on the frame 10, and the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 are arranged on the focal length adjusting mechanism 50, and the focal length adjusting mechanism 50 can drive the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 to approach or leave the rotary workbench 20 so as to adjust the focal length of the laser beam focused on the workpieces.

Optionally, the focal length adjusting mechanism 50 includes an upright post 51 and a driving piece 52 arranged on the upright post 51, the upright post 51 is fixedly connected with the frame 10, and the driving piece 52 is movably arranged on the upright post 51 and can move along the height direction of the upright post 51.

Among them, the upright post 51 can be fixed on the frame 10 by the aforementioned connecting parts such as screws, bolts or screw rods. In some possible ways, the upright post 51 can also be welded to the frame 10 by welding.

The driving piece 52 can be a sliding cylinder, a linear cylinder or a piston cylinder.

The sliding cylinder can slide on the upright post and drive the first three-dimensional galvanometer33 and the second three-dimensional galvanometer34 arranged on tH&/504263 slider of the sliding cylinder to move together. It can be understood that the driving modes of the linear cylinder and the piston cylinder can be the same as or similar to those of the sliding cylinder, which will not be described in detail in this embodiment.

By setting the focal length adjusting mechanism 50 to drive the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 close to or away from the rotary workbench20, the appropriate polishing focal length can be adjusted for workpieces with different sizes, and the application range of laser polishing device can be improved.

Optionally, as shown in FIG. 1 and FIG. 2, in this embodiment of the application, double-beam laser polishing device for aluminum alloy further includes a controller 60, and the controller 60 is arranged on the frame 10, the controller 60 is in electrical signal connection with the first fiber laser 31, the second fiber laser 32, the first three-dimensional galvanometer 33, the second three-dimensional galvanometer 34 and the rotary workbench 20 respectively, and the controller 60 is used for controlling scanning path of the first three-dimensional galvanometer 33 according to the received first polishing path and controlling scanning path of the second three-dimensional galvanometer 34 according to the received second polishing path.

Optionally, in the embodiment of the present application, the controller 60 may be a central processing unit (CPU), a Microcontroller Unit (MCU), a Field-programmable gate array (FPGA), and the like.

Of course, in some possible examples, the controller 60 can also be a computer host or a computer and other equipment equipped with the above CPU, MCU or FPGA.

Optionally, as shown in FIG. 1, the laser polishing device further includes a display 70, the display 70 is arranged at one side of the frame 10 and is respectively in electrical signal connection with the first fiber laser 31, the second fiber laser 32 and the first three-dimensional galvanometer 33, the second three-dimensional galvanometer 34 and rotary workbench 20.

Among them, the display can be a liquid crystal display, a liquid crystal display screen or other display screens, and the display screen can be used to display information such as polishing parameters or current control parameters of the las&k#/504263 polishing device, so that workers can better control and operate the laser polishing device.

Optionally, as shown in FIG. 1, in this embodiment of the application, the rotary workbench 20 is provided with an energy field generator 21, the energy field generator 21 can load an energy field for the workpieces.

Optionally, in the embodiment of the present application, the energy field generator 21 may be an electromagnetic field generator, an ultrasonic generator or a composite generator of an electromagnetic field generator and an ultrasonic generator.

Optionally, the electromagnetic field generator can emit an electromagnetic field, and the electromagnetic field acts on the molten metal, so that the molten metal can flow on the surface of the workpieces and the polishing efficiency of the workpieces can be accelerated. In addition, the ultrasonic generator can generate ultrasonic vibration on the surface of the workpieces, so that micro-explosion occurs in the molten liquid metal on the surface of the workpieces, and air and air gaps in the liquid metal are exhausted, which can make the metal more compact after cooling and solidification, and make the surface strength of the workpieces higher.

In specific use, refer to Figs. 5- 7, in which FIG. 5 is a scanning path diagram of the first three-dimensional galvanometer and the second three-dimensional galvanometer,

FIG. 6 is a partial enlarged view at A in FIG. 5, and FIG. 7 is a specific scanning path diagram of the first three-dimensional galvanometer and the second three-dimensional galvanometer. First, the workpieces can be mounted on the rotary workbench20, and then the scanning path diagrams of the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 shown in FIG. 7 can be acquired by the controller 60. For example, the path of the first three-dimensional galvanometer 33 is set to the conventional zigzag or Z-shaped path S as shown in FIG. 5, and the pulsed laser (that is, the second three-dimensional galvanometer 34) can be used as a sub-mirror or mirror polishing tool, and its path can be diversified, such as the conventional zigzag or

Z-shaped path, or a square wave path, a spiral wave path, etc. In Figs. 6 and 7, the first three-dimensional galvanometer 33 is a zigzag path or Z-shaped path S1 and the second three-dimensional galvanometer 34 is a square wave path S2. As can be sed)504263 from FIG. 7, after the zigzag or Z-shaped path is coupled with the square wave path, the pulsed laser spot can quickly melt and polish the workpieces surface with the help of the afterneat of continuous laser, which can effectively improve the polishing effect and efficiency. In addition, the pulsed laser can also polish the secondary roughness caused by continuous laser, which improves the polishing effect.

According to the embodiment of the second aspect of the application, reference is made to FIG. 8, which is a flow chart of the realization of the double-beam laser polishing method for aluminum alloy provided by the embodiment of the second aspect of the application. This embodiment provides a double-beam laser polishing method for aluminum alloy, which is used in the laser polishing device for aluminum alloy provided by any alternative embodiment of the first aspect of the application. The method includes the following steps: step 801, workpieces are mounted on the rotary workbench 20; step 802, the controller 60 obtains the machining scanning trajectory, and plans the scanning paths of the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 in combination with the analog signals of the inclination sensor, the position sensor and the electronic pressure regulating valve sent by the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34.

Optionally, in this embodiment, the controller 60 can communicate with the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 through RS232 protocol.

Step 803, the controller 60 sends control signals to the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 to control the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 to emit the laser beam and scan and polish the workpieces according to the scanning paths of the first three-dimensional galvanometer 33 and the second three-dimensional galvanometer 34 respectively.

The scanning paths of the first three-dimensional galvanometer 33 and the secorld/504263 three-dimensional galvanometer 34 are different, and the diameter of the light spot formed by the first three-dimensional galvanometer 33 is larger than that of the light spot formed by the second three-dimensional galvanometer 34.

The above is only an alternative embodiment of this application, and is not used to limit this application. Various modifications and variations will be made by those skilled in the field. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of this application shall be included in the scope of the claims of this application.

Claims

CLAIMS LU504263

1. A double-beam laser polishing device for an aluminum alloy, characterized by comprising: a frame (10), a rotary workbench (20) arranged on the frame (10) and an optical path system (30), wherein the rotary workbench (20) is used for bearing workpieces; the optical path system (30) comprises a first fiber laser (31), a second fiber laser (32), a first three-dimensional galvanometer (33) and a second three-dimensional galvanometer (34); the first three-dimensional galvanometer (33) is connected with the first fiber laser (31) through an optical fiber, and the second three-dimensional galvanometer (34) is connected with the second fiber laser (32) through an optical fiber; the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) are arranged side by side above the rotary workbench (20) in the horizontal direction; the first fiber laser (31) and the second fiber laser (32) emits laser beams with different powers and have different laser scanning paths.

2. The double-beam laser polishing device for the aluminum alloy according to claim 1, characterized in that a first diffractive optical element tuner (331) is arranged in the first three-dimensional galvanometer (33), a second diffractive optical element tuner is arranged in the second three-dimensional galvanometer (34), and the light spot diameter after the laser beam is converted by the first diffractive optical element tuner (331) is larger than that after the laser beam is converted by the second diffractive optical element tuner.

3. The double-beam laser polishing device for the aluminum alloy according to claikt/504263 1, characterized in that the laser polishing device further comprises an gas path system (40) arranged on the frame (10), and the gas path system (40) comprises a gas storage tank (41) and an inert gas sealed cabin (42), wherein the gas storage tank (41) is communicated with the inert gas sealed cabin (42) through air delivery pipe, the inert gas sealed cabin (42) is arranged on the rotary workbench (20), and the gas path system (40) is used to provide inert gas for the surface of the workpieces.

4. The double-beam laser polishing device for the aluminum alloy according to claim 1, characterized in that the laser polishing device further comprises a focal length adjusting mechanism (50) arranged on the frame (10), the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) are arranged on the focal length adjusting mechanism (50), and the focal length adjusting mechanism (50) drives the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) to approach or leave the rotary workbench (20) so as to adjust the focal length of the laser beam focused on the workpieces.

5. The double-beam laser polishing device for the aluminum alloy according to claim 4, characterized in that the focal length adjusting mechanism (50) comprises an upright post (51) and a driving piece (52) arranged on the upright post (51), the upright post (51) is fixedly connected with the frame (10), and the driving piece (52) is movably arranged on the upright post (51) and moves along the height direction of the upright post (51).

6. The double-beam laser polishing device for the aluminum alloy according to any one of claims 1-5, characterized in that the laser polishing device further comprises a controller (60), the controller (60) is arranged on the frame (10), the controller (60) is in electrical signal connection with the first fiber laser (31), the second fiber laser (32), the first three-dimensional galvanometer (33), the second three-dimensional galvanometer (34) and the rotary workbench (20) respectively, and the controller (60) is used for controlling scanning path of the first three-dimensional galvanometer (33) according to the received first polishing path and controlling scanning path of the secorld/504263 three-dimensional galvanometer (34) according to the received second polishing path.

7. The double-beam laser polishing device for the aluminum alloy according to claim 6, characterized in that the laser polishing device further comprises a display (70), the display (70) is arranged at one side of the frame (10) and is respectively in electrical signal connection with the first fiber laser (31), the second fiber laser (32), the first three-dimensional galvanometer (33), the second three-dimensional galvanometer (34) and rotary workbench (20).

8. The double-beam laser polishing device for the aluminum alloy according to any one of claims 1-5, characterized in that the rotary workbench (20) is provided with an energy field generator (21), the energy field generator (21) loads an energy field for the workpieces.

9. A double-beam laser polishing method for an aluminum alloy, used in the laser polishing device for aluminum alloy according to any one of claims 1-8, characterized in that the method comprises: workpieces are mounted on the rotary workbench (20); the controller (60) obtains the machining scanning trajectory, and plans the scanning paths of the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) in combination with the analog signals of the inclination sensor, the position sensor and the electronic pressure regulating valve sent by the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34); the controller (60) sends control signals to the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) to control the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) to emit the laser beam and scan the workpieces according to the scanning paths of the first three-dimensional galvanometer (33) and the second three-dimensionaV504263 galvanometer (34) respectively.

10. The double-beam laser polishing method for the aluminum alloy according to claim 9, characterized in that the scanning paths of the first three-dimensional galvanometer (33) and the second three-dimensional galvanometer (34) are different, and the diameter of the light spot formed by the first three-dimensional galvanometer (33) is larger than that of the light spot formed by the second three-dimensional galvanometer (34).