Rotating mirror scanning head for high-energy laser cleaning

Abstract

The utility model discloses a rotating mirror scanning head for high-energy laser cleaning. The rotating mirror scanning head comprises a shell, a collimating mirror group, a reflecting mirror, a rotating mirror motor, a multi-surface reflecting mirror group, a rotating mirror field lens group and a water cooling system. An input port and an output port are arranged in the shell, the input port is used for connecting laser into the shell, the output port is used for outputting scanning light to the outside of the shell, and high heat caused by the fact that the high-energy laser absorbs or reflects light energy into the shell due to an internal optical assembly in the shell must be taken away. According to the utility model, the cooling system is installed to dissipate heat left in the lens group by high-energy laser, so that the damage to each component is avoided. In order to solve the problem, the utility model designs a water cooling system for cooling the shell by utilizing air flow caused by drilling rotation aiming at the shell. According to the structural design and the working principle of the utility model, the scanning speed can be increased by using the rotating mirror, so that the laser processing efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of laser processing, specifically relating to a rotating mirror scanning head for high-energy laser cleaning. Background Technology

[0002] Laser processing, an emerging processing technology, utilizes laser beams for material processing. Its advantages, including environmental friendliness, thorough cleaning, high efficiency, and ease of operation, have led to its widespread application in manufacturing. Processes used in manufacturing include laser cutting, laser cleaning, and laser welding, all employing the energy output of the laser to process materials. However, efficiency is crucial in certain processes. Therefore, high-speed operating equipment is essential for improving the efficiency of laser processing equipment.

[0003] Existing utility model patent CN229445337U discloses a cleaning optical system belonging to the field of laser scanning technology. It describes a laser scanning system comprising a multi-faceted mirror assembly, a bearing mounted on the multi-faceted mirror base, a drive shaft located within the bearing bore, and a photoelectric switch assembly. Another utility model patent, CN219310335U, addresses heat issues by providing two water-cooling plates to reduce the temperature caused by laser reflection. However, the methods described in these two patents do not completely solve the problems associated with laser scanning systems. In the case of CN229445337U, the laser system lacks any cooling system and uses a photoelectric switch assembly to measure the rotation speed (an unnecessary device with current technology), making it unsuitable for high-efficiency, high-energy lasers. While CN219310335U utilizes two water-cooled plates on the casing for heat dissipation, this only removes heat transferred to the casing; uneven heat distribution still occurs in areas of internal heat concentration. This uneven distribution can lead to deformation or damage in some areas, which is not optimal for the overall system. The total internal reflection mirror between the collimating mirror and the rotating mirror, in particular, requires severe cooling. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the shortcomings of the prior art, this utility model provides a rotating mirror scanning head for high-energy laser cleaning, which can improve heat dissipation efficiency.

[0005] Technical solution: A rotating mirror scanning head for high-energy laser cleaning, comprising a housing, a collimating mirror group, a reflecting lens, a reflecting rotating mirror group, a rotating mirror scanning head motor, a rotating mirror field mirror group, and a water cooling system;

[0006] The housing is provided with an input port and an output port. The input port is used to connect a laser to the housing, and the output port is used to output scanning light to the outside of the housing.

[0007] The laser enters the collimating lens group and is collimated before being directed to the reflecting lens, causing the light to be transferred to the reflecting rotating mirror group. The reflecting rotating mirror group then amplifies the light into a high-speed scanning fan-shaped beam. This fan-shaped beam is then shaped by the rotating mirror field mirror group so that the focal point of the fan-shaped beam falls on the projection surface.

[0008] The water cooling system includes the following three components: a water-cooled plate placed at the motor end, a first water-cooled passage surrounding the field lens assembly, and a second water-cooled passage for cooling the total reflection mirror.

[0009] The aforementioned reflective rotating mirror assembly extends into the housing through a hole opened in the housing;

[0010] The rotating mirror scanning head motor is connected to the reflecting rotating mirror assembly via a support plate, so that the rotating mirror scanning head motor can drive the reflecting rotating mirror assembly;

[0011] The support plate has a plurality of ventilation holes. When the plate rotates, the air in the gap between the water-cooled plate and the support plate is cooled by the water-cooled plate and carried by the rotation of the support plate to the middle of the reflective mirror assembly, which produces a cooling effect. Another part of the air leaves the support plate after being cooled, and the reflective mirror assembly is cooled by the flow of air and the heat conduction of the support plate.

[0012] As an optimization: the surrounding field mirror assembly has a first water cooling path and the total reflection mirror assembly has a second water cooling path to cool and dissipate heat. The cooling water path of the surrounding field mirror assembly and the cooling water path on the back of the total reflection mirror can allow the heat of the surrounding field mirror assembly and the reflection mirror to be carried away by water.

[0013] As an optimization: the water-cooled plate is provided with a plurality of holes, which are used to lock onto the housing.

[0014] As an optimization: the water-cooled plate can have heat dissipation fins to increase the cooling effect and increase airflow for better cooling performance.

[0015] As an optimization: the aforementioned reflective rotating mirror assembly can be made of copper or aluminum, materials with excellent thermal conductivity.

[0016] As an optimization: the aforementioned reflective rotating mirror assembly can be made of materials with good thermal conductivity, such as quartz or glass.

[0017] As an optimization: an axial fan with multiple blades that can direct airflow is placed at the center of the reflective mirror assembly. The arrangement of the blades allows air to flow axially through ventilation holes, blowing air from the water-cooled plate to the other side of the housing, thereby cooling the reflective mirror assembly.

[0018] As an optimization: the axial fan is not connected to the rotating shaft of the rotating mirror scanning head motor, but the blades are locked to the central circular hole of the reflecting rotating mirror assembly. In this way, the blades can both fan the air and act as heat dissipation fins, serving two purposes in one.

[0019] As an optimization: the water-cooled plate placed at the motor end has heat dissipation fins to increase heat conduction.

[0020] Beneficial effects: The specific advantages of the rotating mirror scanning head for high-energy laser processing of this invention are as follows:

[0021] 1. The installation cooling system of this utility model can dissipate the heat remaining in the mirror assembly due to high-energy laser, so as to avoid damage to the components. A water cooling system is designed for the shell, which uses the airflow generated by the drilling rotation to cool the shell. This also allows the internal structure to carry away heat, making the temperature of the entire scanning head more uniform and preventing thermal fatigue. The structure of this water cooling system is simple and easy to manufacture.

[0022] 2. Due to its simple structural design, the scanning head of this invention can be made very compact. Furthermore, the use of a rotating mirror increases the scanning speed, thereby improving laser processing efficiency.

[0023] 3. In addition to laser cutting, this utility model can also be used in all processes of laser processing methods such as laser cleaning and laser welding.

[0024] 4. The cooling fan structure at the center of the rotating mirror in this invention is simple and can be used as a heat dissipation fin, resulting in better cooling effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of the rotating mirror scanning head for high-energy laser processing according to this utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the rotating mirror scanning head motor, water cooling plate and rotating mirror part of the high-energy laser processing according to this utility model.

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating mirror scanning head for high-energy laser processing with a fan according to this utility model.

[0028] Figure 4 This is a schematic cross-sectional view of the rotating mirror scanning head for high-energy laser processing with a fan, according to this utility model. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of this utility model, thereby making a clearer definition of the protection scope of this utility model. The embodiments described in this utility model are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0030] Example

[0031] like Figure 1-2 As shown, a rotating mirror scanning head for high-energy laser processing includes a housing 1, a collimating mirror group 2, a reflecting lens 3, a reflecting rotating mirror group 5, a rotating mirror scanning head motor 8, a rotating mirror field mirror group, and a water cooling system.

[0032] The housing 1 is provided with an input port 12 and an output port 13. The input port 12 is used to connect a laser to the housing 1, and the output port 13 is used to output scanning light to the outside of the housing 1.

[0033] The laser enters the collimating lens group 2, which collimates the light and directs it toward the reflecting lens 3, causing the light to be transferred to the reflecting rotating mirror group 5. The reflecting rotating mirror group 5 then amplifies the light into a high-speed scanning fan-shaped beam. This fan-shaped beam is then shaped by the rotating mirror field mirror group so that the focal point of the fan-shaped beam falls on the projection surface.

[0034] Because the high-energy laser generates significant heat within the housing due to the absorption or reflection of light energy by internal optical components, it is essential to dissipate this heat. Therefore, a water cooling system is installed to dissipate this residual heat within the mirror assembly, preventing damage to the components. The installed water cooling system, designed to dissipate this residual heat, comprises three components: a water-cooled plate 9 positioned at the motor end, a first water-cooling passage 61 surrounding the field mirror assembly, and a second water-cooling passage 31 for cooling the total reflection mirror. The first and second water-cooling passages 61 employ cooling and heat dissipation methods.

[0035] Figure 2 This is a cross-sectional view of the rotating mirror scanning head motor 8, water-cooled plate 9, and reflective rotating mirror assembly 5 for high-energy laser processing. Multiple holes 91 are on the top of the water-cooled plate 9 for locking onto the housing 1, while the reflective rotating mirror assembly 5 extends into the housing 1 through holes 11 opened on the housing 1.

[0036] The support plate 51 has a plurality of holes 512 for ventilation. The function of the support plate 51 is to connect the rotating mirror scanning head motor 8 to the reflecting rotating mirror assembly 5 so that the rotating mirror scanning head motor 8 can drive the reflecting rotating mirror assembly 5.

[0037] The ventilation holes 512 allow the air in the gap between the water-cooled plate 9 and the support plate 51 to be cooled by the water-cooled plate 9 during rotation. The air carried by the rotation of the support plate 51 is then carried to the center of the rotating mirror 5, creating a cooling effect. Another portion of the air leaves the support plate 51 after cooling, and the flowing air and heat conduction from the support plate 51 further cool the reflective rotating mirror assembly 5. The water-cooled plate 9 can have heat dissipation fins to enhance cooling and improve airflow, resulting in better cooling. Cooling water enters the water-cooled plate 9 through channel 92 and flows out through the channel. Because this design generates a lot of heat when using high-energy lasers, the rotating mirror is made of a material with excellent thermal conductivity, such as copper or aluminum.

[0038] Example 2

[0039] In this embodiment, if the reflective rotating mirror assembly 5 requires a larger airflow for cooling, an alternative heat dissipation method is needed. In this case, to dissipate the heat inside the housing more evenly, a preferred embodiment of this invention can be represented as follows: Figures 3-4 As shown, Figure 3 Figure 4 Basically and Figure 1 Figure 2 The only difference is that an axial fan with multiple blades 53 that can direct the airflow is placed in the center of the reflective mirror assembly 5 so that the air inside the entire housing can flow to increase the cooling effect. However, when the heat conduction of the mirror itself is good, this fan inside the housing is not needed. The arrangement of the blades 53 allows the air to flow axially through the ventilation holes 512, so that the air is blown from the water-cooled plate 9 to the other side of the housing 1, thereby cooling the reflective mirror assembly 5.

[0040] Based on the above technical solutions, an axial fan is placed in a large circular hole at the center of the rotating mirror. This axial fan can be without a rotating shaft, but rather the blades are locked onto the circular hole at the center of the rotating mirror. In this way, the blades can both fan the air and act as heat dissipation fins, serving two purposes in one.

[0041] Based on the above technical solutions, the water-cooled plate placed at the motor end has heat dissipation fins to increase heat conduction. The cooling water for the field mirror directly carries away the heat of the field mirror through the water-cooling pipes surrounding it, while the cooling water for the total reflection mirror directly carries away the heat of the mirror through the back of the mirror.

Claims

1. A rotating mirror scanning head for high-energy laser cleaning, characterized in that: Includes housing (1), collimating lens group (2), reflecting lens (3), reflecting rotating mirror group (5), rotating mirror scanning head motor (8), rotating mirror field mirror group and water cooling system; The housing (1) is provided with an input port (12) and an output port (13). The input port (12) is used to connect a laser to the housing (1), and the output port (13) is used to output scanning light to the outside of the housing (1). The laser enters the collimating lens group (2) and collimates the light beam before shooting it toward the reflecting lens (3), causing the light beam to be transferred to the reflecting rotating mirror group (5). The reflecting rotating mirror group (5) then amplifies the light beam into a high-speed scanning fan-shaped beam. This fan-shaped beam is then shaped by the rotating mirror field mirror group so that the focal point of the fan-shaped beam can fall on the projection surface. The water cooling system is a water-cooled plate (9) placed at the motor end; The reflective rotating mirror assembly (5) extends into the housing (1) through the hole (11) on the housing (1); The rotating mirror scanning head motor (8) is connected to the reflecting rotating mirror assembly (5) via a support plate (51) so that the rotating mirror scanning head motor (8) can drive the reflecting rotating mirror assembly (5). The support plate (51) has a plurality of ventilation holes (512). The ventilation holes (512) can cool the gap between the water-cooled plate (9) and the support plate (51) when rotating. The air driven by the rotation of the support plate (51) is carried to the middle of the reflective mirror assembly (5) to produce a cooling effect. Another part of the air leaves the support plate (51) under cooling. The flow of air and the heat conduction of the support plate (51) are then used to cool the reflective mirror assembly (5).

2. The rotating mirror scanning head for high-energy laser cleaning according to claim 1, characterized in that: The surround field mirror assembly has a first water cooling passage (61) and the total reflection mirror assembly has a second water cooling passage (31) to cool and dissipate heat. The cooling water passage of the surround field mirror assembly and the cooling water passage on the back of the total reflection mirror can allow the heat of the surround field mirror assembly and the reflection mirror to be carried away by water.

3. The rotating mirror scanning head for high-energy laser cleaning according to claim 1, characterized in that: The water-cooled plate (9) is provided with a plurality of holes (91), which are used to lock onto the housing (1).

4. The rotating mirror scanning head for high-energy laser cleaning according to claim 1, characterized in that: The water-cooled plate (9) may have heat dissipation fins to increase the cooling effect and increase air flow to make the cooling effect better.

5. The rotating mirror scanning head for high-energy laser cleaning according to claim 1, characterized in that: The center of the reflective rotating mirror assembly (5) is placed an axial flow fan with multiple blades (53) that can direct the airflow. The arrangement of the blades (53) allows air to flow axially through ventilation holes (512), blowing air from the water-cooled plate (9) to the other side of the housing (1), thereby cooling the reflective rotating mirror assembly (5).

6. The rotating mirror scanning head for high-energy laser cleaning according to claim 5, characterized in that: The axial fan is not connected to the rotating shaft of the rotating mirror scanning head motor (8), but the blades (53) are locked to the central circular hole of the reflecting rotating mirror assembly (5). In this way, the blades (53) can both fan the air and serve as heat dissipation fins, making it a dual-purpose device.

7. The rotating mirror scanning head for high-energy laser cleaning according to claim 5, characterized in that: The water-cooled plate (9) placed at the motor end has heat dissipation fins to increase heat conduction.

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