Curvature radius adjustable laser paint removal processing head device, system and method

Abstract

The invention discloses a laser paint removal processing head device with an adjustable curvature radius, a system and a method. The laser paint removal processing head device with the adjustable curvature radius comprises a laser system, a reflector with the adjustable curvature radius, a one-dimensional galvanometer, a field lens and a control system. The curvature of the curvature-radius-adjustable reflecting mirror is adjustable; the one-dimensional galvanometer and the field lens are arranged in a transmission path of the laser beam and are used for focusing the laser beam on the paint layer surface of the paint removal workpiece and moving along a preset scanning path; and the control system is connected with the one-dimensional galvanometer and the adjustable curvature radius reflector and outputs a driving signal to the one-dimensional galvanometer and the adjustable curvature radius reflector, so that the laser beam is defocused at the two ends, where the direction of the scanning path is changed, of the laser beam by adjusting the frequency of the driving signal. According to the laser paint removal machining head device with the adjustable curvature radius, ablation of end points of a scanning track can be avoided, and the paint removal quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of laser surface treatment technology, and specifically relates to a laser paint removal head device, system and method with adjustable radius of curvature. Background Technology

[0002] Laser paint removal technology primarily utilizes the high power density of a laser beam to act on the coating, causing it to evaporate or ablate instantaneously. However, during the laser paint removal process, at the endpoints of the linear scanning trajectory, the velocity drops to zero due to the change in direction during the galvanometer's oscillation. Since the laser power remains constant, the concentrated laser power density can easily lead to excessive ablation at the endpoints of the linear scanning trajectory, resulting in damage to the underlying material or uneven coating removal. Related technologies mainly aim to suppress ablation by adjusting the laser repetition frequency and laser power at the endpoints of the linear scanning trajectory, but problems such as uneven energy distribution and inconsistent paint removal effects still exist.

[0003] Therefore, how to accurately control the laser power density at the endpoint of the linear scanning trajectory during laser paint removal, and avoid the negative effects of laser beam concentration, has become a technical challenge that needs to be solved. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a laser paint removal head device with an adjustable radius of curvature that can avoid ablation of the scanning trajectory endpoints and improve paint removal quality.

[0006] An embodiment of the present invention provides a laser paint removal system.

[0007] An embodiment of the present invention proposes a laser paint removal method.

[0008] The laser paint removal head device with adjustable radius of curvature according to an embodiment of the present invention includes:

[0009] A laser system for outputting a laser beam;

[0010] An adjustable radius of curvature reflector is arranged in the transmission path of a laser beam to adjust the optical path direction of the laser beam, and the curvature of the adjustable radius of curvature reflector is adjustable.

[0011] A one-dimensional galvanometer and a field mirror are arranged in the transmission path of the laser beam to receive the laser beam reflected by the adjustable radius of curvature mirror, so that the laser beam is focused on the paint layer surface of the workpiece to be de-painted and moves along a preset scanning path.

[0012] The control system is connected to the one-dimensional galvanometer and the adjustable radius of curvature mirror and outputs a drive signal to the one-dimensional galvanometer and the adjustable radius of curvature mirror. The control system drives the one-dimensional galvanometer to oscillate back and forth to control the scanning path of the laser beam. The control system drives the adjustable radius of curvature mirror to change its curvature so that the laser beam defocuses at both ends of the direction change of its scanning path by adjusting the frequency of the drive signal.

[0013] The laser paint removal head device with adjustable radius of curvature according to the present invention can adjust the focusing curvature of the laser beam through the adjustable radius of curvature reflector, thereby changing the focal depth and power density of the laser beam. At the same time, by adjusting the frequency of the driving signals of the one-dimensional galvanometer and the adjustable radius of curvature reflector, the laser beam is defocused at both ends of the direction change of its scanning path, avoiding ablation of the scanning trajectory endpoints and improving the paint removal quality.

[0014] In some embodiments, the control system includes:

[0015] A galvanometer drive control card, which is connected to the one-dimensional galvanometer;

[0016] A signal delay unit is provided, which is connected to the adjustable radius of curvature mirror and the galvanometer drive control card. The signal delay unit is used to output a first drive signal and a second drive signal. The first drive signal is used to drive the galvanometer drive control card to control the one-dimensional galvanometer to reciprocate. The second drive signal is used to drive the adjustable radius of curvature mirror to adjust the focusing curvature of the laser beam at both ends of the direction change of the laser beam scanning path.

[0017] A controller is connected to the signal delay unit and is used to control the start and stop of the signal delay unit.

[0018] In some embodiments, the frequency of the second driving signal is twice the frequency of the first driving signal.

[0019] In some embodiments, the second driving signal is a pulse signal, the peak time of the second driving signal corresponds to the time when the amplitude of the first driving signal is 0, and the pulse width of the second driving signal is 0.01 / 2 / f to 0.5 / 2 / f, where f is the frequency of the first driving signal;

[0020] And / or, the first driving signal is a triangular wave signal or a sine wave signal;

[0021] And / or, the curvature adjustment range of the adjustable curvature radius reflector is 5 to 50 mm.

[0022] In some embodiments, the frequency of the first driving signal is adjustable, and the adjustable range of the first driving signal f is from 10Hz to 200Hz.

[0023] In some embodiments, a 45-degree reflector is also included, which is arranged in the transmission path of the laser beam to adjust the direction of the laser beam.

[0024] In some embodiments, a cooling water path is further included, which is connected to the adjustable radius of curvature reflector and the 45-degree reflector to cool the adjustable radius of curvature reflector and the 45-degree reflector. The cooling water path connected to the adjustable radius of curvature reflector and the cooling water path connected to the 45-degree reflector are connected in series or in parallel.

[0025] In some embodiments, the system further includes a housing, in which the laser system, the adjustable radius of curvature mirror, the one-dimensional galvanometer, the field mirror, and the control system are all arranged. The housing is provided with a connection interface.

[0026] The laser paint removal system of this invention includes a support platform and a laser paint removal processing head device with adjustable curvature radius as described in any of the above embodiments, wherein the support platform is a machine tool or a robot.

[0027] The laser paint removal method of this invention utilizes a laser paint removal head device with adjustable radius of curvature as described in any of the above embodiments or a laser paint removal system as described in the above embodiments to remove paint from a workpiece, including:

[0028] Set the laser beam parameters;

[0029] Start the laser paint removal head device, and the cooling water circuit provides cooling to the adjustable curvature radius reflector and the 45-degree reflector in the laser paint removal head device with adjustable curvature radius;

[0030] In the control system, a first driving signal frequency for driving the one-dimensional galvanometer and a second driving signal for driving the adjustable radius of curvature mirror are respectively set on the signal delay device. The frequency of the second driving signal is twice the frequency of the first driving signal. The second driving signal is a pulse signal, and the first driving signal is a sine wave signal or a triangular wave signal. The peak time of the second driving signal corresponds to the time when the amplitude of the first driving signal is 0. The pulse width of the second driving signal is 0.01 / 2 / f to 0.5 / 2 / f.

[0031] The controller in the control system is activated to start the laser paint removal head device with adjustable curvature radius. At the same time, the laser is activated so that the laser beam is focused on the paint surface of the workpiece to start scanning and removing the paint.

[0032] After the laser paint removal is completed, the controller and laser are turned off, and the laser paint removal head device with adjustable curvature radius stops working;

[0033] Stop the operation of the cold water circuit and turn off the power. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a laser paint removal processing head device according to an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the laser paint removal processing head device of this invention performing laser beam defocusing operation at both ends of the scanning path direction change.

[0036] Figure 3 This is a schematic diagram of the driving signals according to an embodiment of the present invention.

[0037] Figure label:

[0038] 100. Laser paint removal processing head device;

[0039] 1. Laser system; 11. Laser beam;

[0040] 2. Adjustable radius of curvature reflector;

[0041] 3. 45-degree reflecting mirror;

[0042] 4. One-dimensional galvanometer;

[0043] 5. Field shots;

[0044] 61. Galvanometer drive control card; 62. Signal delay unit; 63. Controller; 64. First drive signal; 65. Second drive signal;

[0045] 7. Shell;

[0046] 8. Paint-removed workpieces; 81. Coatings. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] like Figure 1 As shown, the laser paint removal head device 100 with adjustable radius of curvature according to an embodiment of the present invention includes a laser system 1, an adjustable radius of curvature reflector 2, a one-dimensional galvanometer 4, a field mirror 5, and a control system.

[0049] The laser system 1 is used to output a laser beam 11. The laser system 1 can transport the external laser beam 11 along the transmission path to the adjustable curvature radius reflector 2 and other equipment in the laser paint removal processing head device 100. Optionally, the laser system 1 includes a laser source. The laser system 1 can generate and transmit the laser beam 11.

[0050] An adjustable curvature radius reflector 2 is arranged in the transmission path of the laser beam 11 to adjust the optical path direction of the laser beam 11. The curvature of the adjustable curvature radius reflector 2 is adjustable, which can adjust the focusing curvature during the laser scanning process, thereby changing the focal depth and power density of the laser beam 11.

[0051] In order to control the path of the laser beam 11 and to facilitate the reasonable arrangement of the spatial positions of the components in the laser paint removal head device 100, a 45-degree reflector 3 can also be set up. The 45-degree reflector 3 is arranged in the transmission path of the laser beam 11 to adjust the direction of the laser beam 11. Optionally, the number of 45-degree reflectors 3 can be one or more.

[0052] One-dimensional galvanometer 4 and field mirror 5 are arranged in the transmission path of laser beam 11 to receive laser beam 11 reflected by adjustable radius of curvature mirror 2 and 45-degree mirror 3. One-dimensional galvanometer 4 swings back and forth, and field mirror 5 can control the relationship between scanning angle and focal position, so that laser beam 11 is focused on the paint layer surface of paint removal workpiece and moves along preset scanning path.

[0053] The control system is connected to the one-dimensional galvanometer 4 and the adjustable radius of curvature mirror 2 and outputs drive signals to the one-dimensional galvanometer 4 and the adjustable radius of curvature mirror 2. The control system drives the one-dimensional galvanometer 4 to swing back and forth to control the scanning path of the laser beam 11, and drives the adjustable radius of curvature mirror 2 to change the curvature.

[0054] To prevent ablation of the workpiece at both ends of the scanning path direction change of the laser beam 11, this embodiment of the invention adjusts the frequencies of two driving signals. When the laser beam 11 scans at a normal speed along the scanning path, its focus is on the paint layer surface in the coating 81 of the workpiece 8. When the laser beam 11 is at both ends of its scanning path direction change, the focusing curvature of the laser beam 11 can be changed by the adjustable radius of curvature reflector 2 to perform defocusing operation of the laser beam 11. Figure 2 As shown.

[0055] The adjustable radius of curvature laser paint removal head device 100 of this invention can be widely used in coating removal in the automotive, aviation, aerospace, and shipbuilding industries, as well as surface treatment of complex surfaces and precision parts. It has broad market application prospects. It can adjust the focusing curvature of the laser beam 11 through the adjustable radius of curvature mirror 2, thereby changing the focal depth and power density of the laser beam 11. At the same time, by adjusting the frequency of the driving signals of the one-dimensional galvanometer 4 and the adjustable radius of curvature mirror 2, the laser beam 11 is defocused at both ends of the direction change of its scanning path, avoiding ablation of the scanning trajectory endpoints and improving the paint removal quality.

[0056] The following describes a laser paint removal head device 100 with adjustable radius of curvature according to another specific embodiment of the present invention.

[0057] The laser paint removal head device 100 with adjustable radius of curvature according to an embodiment of the present invention includes a housing 7, a laser system 1, a control system, a cooling water circuit, and an adjustable radius of curvature reflector 2, a 45-degree reflector 3, a one-dimensional galvanometer 4, and a field mirror 5 arranged in the transmission path of the laser beam 11.

[0058] The laser system 1, the adjustable curvature radius reflector 2, the one-dimensional galvanometer 4, the field mirror 5, and the cooling water channel are all arranged inside the housing 7. The housing 7 is provided with a connection interface, which can be connected to an industrial robot or machine tool to support the laser paint removal head device 100 or drive the laser paint removal head device 100 to move. Of course, the connection interface can also be used as an operating handle for the operator to hold and operate.

[0059] The cooling water circuit is connected to the adjustable radius of curvature reflector 2 and the 45-degree reflector 3. During operation, it is used to cool the adjustable radius of curvature reflector 2 and the 45-degree reflector 3. The cooling water circuit connected to the adjustable radius of curvature reflector 2 and the cooling water circuit connected to the 45-degree reflector 3 are connected in series or in parallel.

[0060] The laser system 1 is used to output a laser beam 11. The laser system 1 can transport the external laser beam 11 along the transmission path to the adjustable curvature radius reflector 2 and other equipment in the laser paint removal head device 100. Optionally, the laser system 1 includes a laser source. The laser system 1 can generate and transmit the laser beam 11. Alternatively, the laser source can be arranged as a separate component independently of the laser paint removal head device 100.

[0061] A laser source is used to generate the laser beam. The laser source can be a pulsed laser or a continuous laser source. Pulsed laser sources typically use Nd:YAG lasers with a wavelength of 1064 nm, or fiber lasers with a wavelength of 1060-1070 nm. The duration (pulse width) of the laser pulse can be set to the nanosecond level, typically 30-500 ns, to effectively heat-treat and remove coatings. The laser pulse energy is 5-50 mJ (adjusted according to coating thickness and type); the laser pulse frequency is 10 kHz-200 kHz. The transmission component in the laser system consists of a fiber optic QBH connector or a standard isolator, used to transmit the laser beam from the laser source to the laser paint removal head. During transmission, the beam quality remains constant, ensuring that the laser beam maintains high energy density and focusing quality after scanning by the galvanometer.

[0062] Adjustable radius of curvature mirrors and 45-degree mirrors are arranged to adjust the optical path direction of the laser beam. The curvature of the adjustable radius of curvature mirrors is adjustable, which can adjust the focusing curvature during the laser scanning process, thereby changing the focal depth and power density of the laser beam.

[0063] A one-dimensional galvanometer receives a laser beam reflected from an adjustable radius of curvature mirror and a 45-degree mirror. The galvanometer oscillates back and forth, causing the laser beam to form a linear scanning path on the target coating surface. A field lens controls the relationship between the scanning angle and the focal point, thus focusing the laser beam onto the paint layer surface of the workpiece and moving it along a preset scanning path. The scanning frequency of the galvanometer is typically 10-200Hz; this embodiment selects 80Hz. The deflection angle of the one-dimensional galvanometer can be precisely set by the control system, with a deflection angle range of ±25°.

[0064] The control system includes a galvanometer drive control card 61, a signal delay unit 62, and a controller 63. The controller 63 is connected to the signal delay unit 62, and the galvanometer drive control card 61 is connected to the one-dimensional galvanometer 4. The controller 63 controls the start and stop of the signal delay unit 62 and can communicate with other devices in the laser paint removal system, such as controlling the start or stop of the laser source and cooling water circuit. The signal delay unit 62 is connected to the adjustable radius of curvature mirror 2 and the galvanometer drive control card 61. The signal delay unit 62 outputs a first drive signal 64 and a second drive signal 65. The first drive signal 64 drives the galvanometer drive control card 61 to control the reciprocating oscillation of the one-dimensional galvanometer 4 to control the scanning path of the laser beam 11. During scanning, the adjustable radius of curvature mirror 2 adjusts the focal depth of the laser beam 11 as needed, thereby adjusting the power density of the laser beam 11. The second drive signal 65 drives the adjustable radius of curvature mirror 2 to adjust the focusing curvature of the laser beam 11 at both ends of the direction change of the laser beam 11 scanning path.

[0065] In other words, to avoid ablation of the workpiece at both ends of the direction change of the scanning path of the laser beam 11, this embodiment of the invention adjusts the frequency of the two driving signals so that when the laser beam 11 scans at a normal speed in the scanning path, the focal point of the laser beam 11 can be focused on the paint layer surface of the workpiece. When the laser beam 11 is at both ends of the direction change of its scanning path, the focusing curvature of the laser beam 11 can be changed by the adjustable curvature radius reflector 2 to perform defocusing operation of the laser beam 11.

[0066] Specifically, such as Figure 3 As shown, in this embodiment of the invention, the first driving signal 64 is a triangular wave signal or a sine wave signal, etc., and the second driving signal 65 is a pulse signal; the frequency of the second driving signal 65 is twice the frequency of the first driving signal 64, such as... Figure 3 As shown, the peak time of the second driving signal 65 corresponds to the moment when the amplitude of the first driving signal 64 is 0, and the pulse width of the second driving signal 65 is from 0.01 / 2 / f to 0.5 / 2 / f, where f is the frequency of the first driving signal 64; in this embodiment, a frequency of 160Hz is selected, and the pulse width is 0.2 / 2 / f = 1.25ms. The focusing curvature adjustment range of the adjustable curvature radius reflector 2 is 5 to 50mm. The adjustable curvature radius reflector 2 can effectively defocus at the beginning and end of the scanning path of the laser beam 11, thereby reducing the power density of this part and avoiding over-ablation caused by excessive concentration of the laser beam 11.

[0067] This invention, by combining an adjustable radius of curvature mirror 2 and a one-dimensional galvanometer 4, enables precise adjustment of the power density and focal depth of the laser beam 11, achieving uniform removal of the paint layer. During the scanning process, the laser beam 11 is defocused by the electrically adjustable radius of curvature mirror 2, effectively avoiding localized ablation caused by excessively high laser power density and reducing damage to the underlying material.

[0068] The laser paint removal system of this invention includes a support platform and a laser paint removal processing head device 100 with an adjustable radius of curvature as described in any of the above embodiments. The support platform is a machine tool or a robot. The beneficial effects achieved by the laser paint removal system of this invention are the same as those achieved by the laser paint removal processing head device 100 with an adjustable radius of curvature in the above embodiments, and therefore will not be described again.

[0069] The laser paint removal method of this invention utilizes the laser paint removal head device 100 with adjustable radius of curvature as described in any of the above embodiments or the laser paint removal system described in the above embodiments to remove paint from the workpiece, including:

[0070] S101. Set the laser beam 11 parameters according to the properties of the surface soil layer of the workpiece to be painted. For example, the target coating is a 50μm thick polyurethane.

[0071] S102. Start the laser paint removal head device 100 to power on the system and start the water chiller. The water chiller delivers circulating coolant to the cooling water circuit, which in turn cools the adjustable radius of curvature reflector 2 and 45-degree reflector 3 in the laser paint removal head device 100.

[0072] S103. In the control system, the signal delay timer 62 is respectively set with a first driving signal 64 frequency for driving the one-dimensional galvanometer 4 and a second driving signal 65 for driving the adjustable radius of curvature mirror 2. The frequency of the second driving signal 65 is twice the frequency of the first driving signal 64. The frequency of the first driving signal 64 is f = 50Hz, which is the scanning frequency of the one-dimensional galvanometer 4. The first driving signal 64 is a sine wave. The frequency of the second driving signal 65 is 2*f = 100Hz. The second driving signal 65 is a pulse signal. The peak time of the second driving signal 65 corresponds to the time when the amplitude of the first driving signal 64 is 0. The pulse width of the second driving signal 65 is 0.01 / 2 / f to 0.5 / 2 / f. Preferably, the pulse width is 2ms.

[0073] This embodiment is highly adaptable and can be adjusted for different types of coatings, coating thicknesses, and material properties to ensure the stability and consistency of laser paint removal effects.

[0074] S104. The controller 63 in the control system is activated to start the laser paint removal head device 100 with adjustable curvature radius. At the same time, the laser is activated so that the laser beam 11 is focused on the paint surface of the workpiece to start scanning and removing paint. Simultaneously, the laser paint removal head device 100 moves under the drive of the industrial robot and machine tool, with the movement direction perpendicular to the scanning direction of the one-dimensional galvanometer 4 of the laser paint removal head, thereby realizing laser paint removal.

[0075] During laser paint removal, under the control of the drive signal, the adjustable curvature radius reflector 2 performs defocusing of the laser beam 11 at both ends of the scanning path direction change to avoid excessive edge ablation. Figure 2 As shown.

[0076] S105. After the laser paint removal is completed, turn off the controller 63 and the laser, stop the laser output, and stop the operation of the radius-adjustable reflector and the one-dimensional galvanometer 4. The laser paint removal head device 100 with adjustable radius of curvature stops working.

[0077] S106. Turn off the water chiller, stop the operation of the chilled water circuit, and turn off the system power.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0082] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A laser paint removal processing head device with adjustable curvature radius, characterized in that: include: A laser system, wherein the laser system is used to output a laser beam; An adjustable curvature radius reflector, wherein the adjustable curvature radius reflector is arranged in the transmission path of the laser beam to adjust the optical path direction of the laser beam, and the curvature of the adjustable curvature radius reflector is adjustable; A one-dimensional galvanometer and a field mirror, wherein the one-dimensional galvanometer and the field mirror are arranged in the transmission path of the laser beam and are used to receive the laser beam reflected by the adjustable curvature radius reflector so that the laser beam is focused on the paint layer surface of the paint removal workpiece and moves along a preset scanning path; A control system is provided, wherein the control system is connected to the one-dimensional galvanometer and the adjustable curvature radius reflector and outputs a driving signal to the one-dimensional galvanometer and the adjustable curvature radius reflector, wherein the control system drives the one-dimensional galvanometer to swing back and forth to control the scanning path of the laser beam, and the control system drives the adjustable curvature radius reflector to change the curvature, so as to defocus the laser beam at both ends of the direction change of its scanning path by adjusting the frequency of the driving signal.

2. The laser paint removal processing head device with adjustable curvature radius according to claim 1 is characterized in that: The control system comprises: A galvanometer drive control card, wherein the galvanometer drive control card is connected to the one-dimensional galvanometer; A signal delayer, the signal delayer is connected to the adjustable curvature radius reflector and the galvanometer drive control card, the signal delayer is used to output a first drive signal and a second drive signal, the first drive signal is used to drive the galvanometer drive control card to control the reciprocating swing of the one-dimensional galvanometer, and the second drive signal is used to drive the adjustable curvature radius reflector to adjust the focusing curvature of the laser beam at both ends of the direction change of the laser beam scanning path; A controller is connected to the signal delayer, and is used to control the start and stop of the signal delayer.

3. The laser paint removal processing head device with adjustable curvature radius according to claim 2 is characterized in that: The frequency of the second driving signal is twice the frequency of the first driving signal.

4. The laser paint removal processing head device with adjustable curvature radius according to claim 3 is characterized in that: The second driving signal is a pulse signal, the peak moment of the second driving signal corresponds to the moment when the amplitude of the first driving signal is 0, and the pulse width of the second driving signal is 0.01 / 2 / f to 0.5 / 2 / f, where f is the frequency of the first driving signal; And / or, the first driving signal is a triangular wave signal or a sine wave signal; And / or, the curvature adjustment range of the adjustable curvature radius reflector is 5 to 50 mm.

5. The laser paint removal processing head device with adjustable curvature radius according to any one of claims 2 to 4, characterized in that: The frequency of the first driving signal is adjustable, and the adjustable range of the first driving signal f is 10 Hz to 200 Hz.

6. The laser paint removal processing head device with adjustable curvature radius according to claim 1, characterized in that: The invention also comprises a 45-degree reflecting mirror, which is arranged in the transmission path of the laser beam and is used for adjusting the direction of the laser beam.

7. The laser paint removal processing head device with adjustable curvature radius according to claim 6, characterized in that: It also includes a cooling water circuit, which is connected to the adjustable curvature radius reflector and the 45-degree reflector to cool the adjustable curvature radius reflector and the 45-degree reflector. The cooling water circuit connected to the adjustable curvature radius reflector and the cooling water circuit connected to the 45-degree reflector are connected in series or in parallel.

8. The laser paint removal processing head device with adjustable curvature radius according to claim 1, characterized in that: It also includes a shell, in which the laser system, the reflector with adjustable curvature radius, the one-dimensional galvanometer, the field mirror and the control system are all arranged, and a connection interface is provided on the shell.

9. A laser paint removal system, characterized in that: The invention comprises a support platform and a laser paint removal processing head device with adjustable curvature radius as claimed in any one of claims 1 to 9, wherein the support platform is a machine tool or a robot.

10. A laser paint removal method, characterized in that: Using the laser paint removal processing head device with adjustable curvature radius as described in any one of claims 1 to 8 or the laser paint removal system as described in claim 9 to remove paint from a workpiece, comprising: Set laser beam parameters; The laser paint removal processing head device is started, and the cooling water circuit provides cooling for the adjustable curvature radius reflector and the 45-degree reflector in the laser paint removal processing head device with adjustable curvature radius; A first driving signal frequency for driving the one-dimensional galvanometer and a second driving signal for driving the adjustable curvature radius reflector are respectively set on the signal delay device in the control system, wherein the frequency of the second driving signal is twice the frequency of the first driving signal, the second driving signal is a pulse signal, the first driving signal is a sine signal or a triangular wave signal, the peak moment of the second driving signal corresponds to the moment when the amplitude of the first driving signal is 0, and the pulse width of the second driving signal is 0.01 / 2 / f to 0.5 / 2 / f; Starting the controller in the control system to control the laser paint removal processing head device with adjustable curvature radius to start working, and simultaneously starting the laser to focus the laser beam on the paint layer surface of the workpiece to start scanning and paint removal; After the laser paint removal is completed, the controller and the laser are turned off, and the laser paint removal processing head device with adjustable curvature radius stops working; Stop the cold water circuit and turn off the power.

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