Laser cleaning head and laser cleaning equipment

Abstract

The utility model belongs to the technical field of laser cleaning, and provides a laser cleaning head and laser cleaning device.The laser cleaning head comprises a cleaning head body and a temperature measuring unit arranged on the cleaning head body, the cleaning head body is provided with a first light emitting part, and the first light emitting part is used for emitting laser to clean dirt on the surface of an object; the temperature measuring unit is provided with a second light emitting part, the second light emitting part is used for emitting temperature measuring light to the surface of the object to measure the temperature of the surface of the object, and the drop point of the temperature measuring light on the surface of the object coincides with the drop point of the laser on the surface of the object. The temperature measuring unit is arranged on the laser cleaning head, in the process of moving the laser cleaning head, the temperature measuring unit can synchronously move along with the laser cleaning head, real-time temperature measurement on a laser cleaning area on the surface of an object is achieved, and the laser cleaning duration can be controlled according to the temperature detected in real time during operation; therefore, the temperature of the cleaning area can be in a proper range, and the situation that the surface of an object is damaged due to too high temperature is reduced.

Description

Technical Field

[0001] The present application belongs to the field of laser cleaning technology, and more specifically, relates to a laser cleaning head and a laser cleaning device. Background Art

[0002] Laser cleaning technology refers to the process of irradiating the surface of the workpiece with a high-energy laser beam after collimating and focusing the optical path, causing the dirt, rust or coating on the surface to evaporate or peel off instantly, thereby achieving cleaning.

[0003] With the gradual maturity of laser cleaning technology, its application in the industrial field has gradually increased. Among them, handheld laser cleaning heads are widely used because of their diverse designs that can meet customers' diverse laser cleaning operation needs.

[0004] During the laser cleaning process, after the dirt on the surface of the object absorbs the laser energy, it will either vaporize and volatilize, or expand instantly due to heat, overcoming the surface's adsorption force on the particles and leaving the surface of the object. This process generates a large amount of heat. If too much heat is generated, the surface temperature of the object will be too high and damaged. The laser energy absorbed by the dirt on the surface of the object is affected by the movement speed of the laser cleaning head. When the laser head moves slowly, a better cleaning effect can be achieved. However, if the laser irradiates the same position for a long time, the temperature of the irradiated position will rise rapidly and overheat. When the laser head moves quickly, the laser irradiation time is shortened, which can reduce the risk of overheating. However, there is a possibility that the cleaning will not be in place due to insufficient irradiation time. Therefore, how to accurately know the temperature of the object surface during the cleaning process is crucial. In related technologies, the movement speed of the laser cleaning head depends on the worker's proficiency and experience. The temperature of the object surface cannot be accurately known during the cleaning process, which makes it difficult to ensure the cleaning effect and is not conducive to improving work efficiency. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a laser cleaning head and a laser cleaning device to solve the technical problem in the prior art that the temperature of the surface of the object being cleaned cannot be known.

[0006] To achieve the above objectives, the technical solution adopted in this application is:

[0007] In a first aspect, a laser cleaning head is provided, comprising a cleaning head body and a temperature measuring unit arranged on the cleaning head body, the cleaning head body having a first light emitting portion, the first light emitting portion being used to emit laser to clean dirt on the surface of an object, the temperature measuring unit having a second light emitting portion, the second light emitting portion being used to emit temperature measuring light to the surface of the object to measure the temperature of the surface of the object, the landing point of the temperature measuring light on the surface of the object coincides with the landing point of the laser on the surface of the object.

[0008] Optionally, the temperature measuring unit includes an angle adjustment component, and the second light emitting portion is connected to the cleaning head body via the angle adjustment component, and the angle adjustment component is used to adjust the light emitting direction of the second light emitting portion.

[0009] Optionally, the angle adjustment assembly includes a first mounting seat and a second mounting seat rotatably connected to the first mounting seat, the first mounting seat is connected to the cleaning head body, and the second mounting seat is connected to the second light output portion.

[0010] Optionally, a first damping member is provided between the first mounting seat and the second mounting seat, and the first damping member is clamped between the first mounting seat and the second mounting seat to increase the resistance to the mutual rotation of the first mounting seat and the second mounting seat.

[0011] Optionally, the first damping member has a first protrusion and a first stud connected to the first protrusion, the first protrusion protrudes from the first mounting seat and presses against the surface of the second mounting seat, the first mounting seat is provided with a first threaded hole, and the first stud is threadedly connected to the first threaded hole.

[0012] Optionally, the angle adjustment assembly also includes a third mounting base rotatably connected to the second mounting base, the second mounting base is connected to the second light-emitting portion through the third mounting base, the second mounting base rotates around the first axis, and the third mounting base rotates around the second axis, and the first axis and the second axis form an angle.

[0013] Optionally, a second damping member is provided between the second mounting seat and the third mounting seat, and the second damping member is clamped between the second mounting seat and the third mounting seat to increase the resistance to the mutual rotation of the second mounting seat and the third mounting seat.

[0014] Optionally, the temperature measuring light is invisible light, and the temperature measuring unit further includes a third light emitting portion, the third light emitting portion being configured to emit visible temperature measuring indicator light to mark the light emitting direction of the temperature measuring light; and / or,

[0015] The laser cleaning head also includes a focus indication unit, which includes a fourth light output portion and a fifth light output portion. The fourth light output portion is used to emit a first focus indication light, and the fifth light output portion is used to emit a second focus indication light. The first focus indication light and the second focus indication light form an angle, and the first focus indication light and the second focus indication light intersect with the focus of the laser.

[0016] Optionally, the laser cleaning head also includes a blowing unit for spraying gas onto the surface of the object, the blowing unit including an air outlet arranged on the cleaning head body and an air duct arranged inside the cleaning head body, the air outlet is arranged on the periphery of the first light output portion and faces the object, and the air duct is connected to the air outlet.

[0017] In a second aspect, a laser cleaning device is provided, comprising a device body and the above-mentioned laser cleaning head, wherein the laser cleaning head is installed on the device body.

[0018] The beneficial effect of the laser cleaning head provided in the present application is that: by arranging a temperature measuring unit on the cleaning head body, the temperature measuring unit will move synchronously with the cleaning head body during the movement of the cleaning head body. In this way, the temperature of the surface of the object can be synchronously measured using the laser cleaning head during the laser cleaning process, that is, real-time temperature measurement of the laser-cleaned area on the surface of the object can be achieved. If the temperature is too high, the moving speed of the cleaning head body can be appropriately accelerated. If the temperature is too low, the moving speed of the cleaning head body can be appropriately reduced. In this way, during operation, the laser cleaning duration can be controlled according to the real-time detected temperature, so that the temperature of the cleaning area can be within an appropriate range, reducing the occurrence of damage to the object surface due to excessive temperature; the landing point of the temperature measuring light on the surface of the object is coincided with the landing point of the laser on the surface of the object. During the cleaning process, the temperature measuring light can perform real-time temperature detection on the position with the highest temperature on the surface of the object, which can improve the accuracy of temperature detection, thereby controlling the temperature of the laser-cleaned area to be within an appropriate range, reducing the occurrence of damage to the object surface due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of a laser cleaning head from one perspective provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 Schematic diagram of another viewing angle of the laser cleaning head shown (temperature measuring light and second focus indicator light are not shown);

[0022] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0023] Figure 4A schematic diagram of a temperature measurement unit of a laser cleaning head provided in an embodiment of the present application;

[0024] Figure 5 for Figure 4 The cross-sectional view of the temperature measuring unit shown Figure 1 ;

[0025] Figure 6 for Figure 4 The cross-sectional view of the temperature measuring unit shown Figure 2 ;

[0026] Figure 7 A schematic diagram of the second rotating shaft of the temperature measuring unit of the laser cleaning head provided in an embodiment of the present application;

[0027] Figure 8 A partial schematic diagram of a laser cleaning head provided in an embodiment of the present application;

[0028] Figure 9 for Figure 8 A magnified schematic diagram of point B in FIG.

[0029] Figure 10 for Figure 1 A schematic diagram of the laser cleaning head from another perspective;

[0030] Figure 11 for Figure 10 Schematic diagram of the cross-section at CC in.

[0031] Among them, the reference numerals in the figures are:

[0032] 100, temperature measurement light; 200, second focus indication light;

[0033] 1. Cleaning head body; 11. Housing; 111. First chamber; 112. First opening; 113. Airway; 114. Air outlet; 12. First light output portion; 121. Field lens; 13. Fifth light output portion; 14. Galvanometer; 15. Motor; 16. Switch button; 17. Switch indicator light;

[0034] 2. Temperature measurement unit; 21. Second light output portion; 22. Angle adjustment assembly; 221. First mounting seat; 222. Second mounting seat; 2221. Connecting portion; 223. Third mounting seat; 2231. Lock hole; 224. First rotating shaft; 225. Second rotating shaft; 2251. Lock groove; 2252. Ring groove; 226. First damping member; 2261. First stud; 2262. First protrusion; 227. Second damping member; 2271. Second stud; 2272. Second protrusion;

[0035] 3. Grip handle; 31. Fixing part. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0039] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0040] Laser cleaning technology refers to the process of irradiating the surface of the workpiece with a high-energy laser beam after collimating and focusing the optical path, causing the dirt, rust or coating on the surface to evaporate or peel off instantly, thereby achieving cleaning.

[0041] With the gradual maturity of laser cleaning technology, its application in the industrial field has gradually increased. Among them, handheld laser cleaning heads are widely used because of their diverse designs that can meet customers' diverse laser cleaning operation needs.

[0042] Laser cleaning technology refers to the process of irradiating the surface of the workpiece with a high-energy laser beam after collimating and focusing the optical path, causing the dirt, rust or coating on the surface to evaporate or peel off instantly, thereby achieving cleaning.

[0043] With the gradual maturity of laser cleaning technology, its application in the industrial field has gradually increased. Among them, handheld laser cleaning heads are widely used because of their diverse designs that can meet customers' diverse laser cleaning operation needs.

[0044] During the laser cleaning process, after the dirt on the surface of the object absorbs the laser energy, it will either vaporize and volatilize, or expand instantly due to heat, overcoming the surface's adsorption force on the particles and leaving the surface of the object. This process generates a large amount of heat. If too much heat is generated, the surface temperature of the object will be too high and damaged. The laser energy absorbed by the dirt on the surface of the object is affected by the movement speed of the laser cleaning head. When the laser head moves slowly, a better cleaning effect can be achieved. However, if the laser irradiates the same position for a long time, the temperature of the irradiated position will rise rapidly and overheat. When the laser head moves quickly, the laser irradiation time is shortened, which can reduce the risk of overheating. However, there is a possibility that the cleaning will not be in place due to insufficient irradiation time. Therefore, how to accurately know the temperature of the object surface during the cleaning process is crucial. In related technologies, the movement speed of the laser cleaning head depends entirely on the worker's proficiency and experience. It is impossible to accurately know the temperature of the object surface during the cleaning process, which makes it difficult to guarantee the cleaning effect and is not conducive to improving work efficiency.

[0045] Based on this, the embodiment of the present application provides a laser cleaning head and a laser cleaning device to solve the above problems. Figure 1 and Figure 2 , the laser cleaning head provided in the embodiment of the present application is described.

[0046] The laser cleaning head of the embodiment of the present application includes a cleaning head body 1 and a temperature measuring unit 2 arranged on the cleaning head body 1. The cleaning head body 1 has a first light emitting portion 12, which is used to emit laser to clean dirt on the surface of an object. The temperature measuring unit 2 has a second light emitting portion 21, which is used to emit temperature measuring light 100 to the surface of the object to measure the temperature of the surface of the object. The landing point of the temperature measuring light 100 on the surface of the object coincides with the landing point of the laser on the surface of the object.

[0047] By arranging a temperature measuring unit 2 on the cleaning head body 1, the temperature measuring unit 2 will move synchronously with the cleaning head body 1 during the movement of the cleaning head body 1. In this way, the temperature of the surface of the object can be synchronously measured using the laser cleaning head during the laser cleaning process, that is, real-time temperature measurement of the laser-cleaned area on the surface of the object can be achieved. If the temperature is too high, the moving speed of the cleaning head body 1 can be appropriately accelerated. If the temperature is too low, the moving speed of the cleaning head body 1 can be appropriately reduced. In this way, the duration of laser cleaning can be controlled according to the real-time detected temperature during operation, so that the temperature of the cleaning area can be within an appropriate range, thereby reducing the occurrence of damage to the object surface due to excessively high temperature.

[0048] In this embodiment, it can be understood that the landing point of the laser on the surface of the object is the position where the temperature of the object surface is the highest. The landing point of the temperature measuring light 100 on the surface of the object is coincided with the landing point of the laser on the surface of the object. During the cleaning process, the temperature measuring light 100 can perform real-time temperature detection on the position where the temperature of the object surface is the highest. This can improve the accuracy of temperature detection, thereby controlling the temperature of the laser cleaning area within an appropriate range, and reducing the occurrence of damage to the object surface due to excessive temperature.

[0049] It can be understood that the focal position of the laser is the position where the laser energy is most concentrated. During the cleaning process of this embodiment, the focus of the laser falls on the surface of the object, so that the dirt on the surface of the object can absorb the most energy per unit time, thereby allowing the dirt to vaporize and evaporate at the fastest speed, or instantly expand due to heat to overcome the surface's adsorption force on the particles and detach from the surface of the object.

[0050] In this embodiment, further combined Figure 10 The first light output portion 12 of the laser cleaning head is provided with a detachable field lens 121. The field lens 121 can adjust the focal length of the laser. By replacing different field lenses 121, the laser can have different focal lengths, thereby realizing laser cleaning of objects of different materials.

[0051] Reference Figure 1 、 Figure 2 and Figure 4 The temperature measuring unit 2 further includes an angle adjustment assembly 22 connecting the second light emitting portion 21 and the cleaning head body 1. The second light emitting portion 21 is connected to the cleaning head body 1 via the angle adjustment assembly 22. The angle adjustment assembly 22 is used to adjust the light emitting direction of the second light emitting portion 21. By providing the angle adjustment assembly 22, the light emitting direction of the second light emitting portion 21 can be adjusted, that is, the direction of the temperature measuring light 100 can be adjusted. On the one hand, this allows the temperature measuring unit 2 to measure the temperature at different locations on the surface of an object. On the other hand, by adjusting the direction of the temperature measuring light 100 to adapt to changes in the focal length of the laser, the temperature measuring unit 2 can perform real-time temperature detection at the location with the highest surface temperature.

[0052] For example, in this embodiment, since the focal length of the laser changes with the replacement of the field lens 121, the direction of the temperature measuring light 100 can be adjusted to ensure that the intersection of the temperature measuring light 100 and the laser is located at the focus of the laser, thereby ensuring that the intersection of the temperature measuring light 100 and the laser is located on the surface of the object, that is, ensuring that the temperature measuring unit 2 can perform real-time temperature measurement of the laser-cleaned area on the surface of the object.

[0053] The angle adjustment assembly 22 includes a first mounting seat 221 and a second mounting seat 222 rotatably connected to the first mounting seat 221. The first mounting seat 221 is connected to the cleaning head body 1, and the second mounting seat 222 is connected to the second light emitting portion 21. By providing the rotatably connected first mounting seat 221 and second mounting seat 222, the position of the second light emitting portion 21 and the cleaning head body 1 can be adjusted by adjusting the relative position between the first mounting seat 221 and the second mounting seat 222, thereby adjusting the relative light emitting direction between the second light emitting portion 21 and the first light emitting portion 12, thereby changing the intersection position of the temperature measuring light 100 and the laser so that the intersection point of the temperature measuring light 100 and the laser is at the focus of the laser.

[0054] In this embodiment, the first mounting seat 221 and the second mounting seat 222 are hingedly connected.

[0055] In some embodiments, the position of the first mounting seat 221 and the second mounting seat 222 can be adjusted by manually rotating the first mounting seat 221 or the second mounting seat 222. In other embodiments, a motor can be installed between the first mounting seat 221 and the second mounting seat 222, and the motor can be used to electrically drive the first mounting seat 221 or the second mounting seat 222 to rotate to achieve position adjustment of the two.

[0056] In this embodiment, the positions of the first mounting seat 221 and the second mounting seat 222 are adjusted by manual rotation.

[0057] Reference Figure 5 A first damping member 226 is provided between the first mounting seat 221 and the second mounting seat 222. The first damping member 226 is clamped between the first mounting seat 221 and the second mounting seat 222 to increase the resistance to the relative rotation of the first mounting seat 221 and the second mounting seat 222. It is understandable that during the laser cleaning process, the laser cleaning head needs to be constantly moved to adjust the relative position of the laser cleaning head and the object. During the movement, the laser cleaning head will vibrate. In this way, the provision of the first damping member 226 can increase the resistance to the relative rotation of the first mounting seat 221 and the second mounting seat 222, thereby reducing the risk of relative rotation of the first mounting seat 221 and the second mounting seat 222 when there is no need to adjust the angle of the temperature measuring light 100.

[0058] In this embodiment, the first damping member 226 is movably provided on the first mounting seat 221. The first damping member 226 can be moved to adjust the force between the first protrusion 2262 and the second mounting seat 222. It is understandable that the magnitude of the friction between the first protrusion 2262 and the second mounting seat 222 is affected by the magnitude of the force between the first protrusion 2262 and the second mounting seat 222. By providing the movable first damping member 226, the relative position between the first protrusion 2262 and the second mounting seat 222 can be changed by adjusting the position of the first damping member 226, that is, the magnitude of the force between the first protrusion 2262 and the second mounting seat 222 can be adjusted. When it is necessary to adjust the direction of the temperature measuring light 100, the first damping member 226 can be moved so that the first protrusion 2262 moves in a direction away from the second mounting seat 222, thereby reducing the friction between the first protrusion 2262 and the second mounting seat 222. The force between the mounting seats 222 reduces the friction force generated by the relative rotation of the first protrusion 2262 and the second mounting seat 222, thereby reducing the resistance to the relative rotation of the first mounting seat 221 and the second mounting seat 222, making it convenient to adjust the light emission direction of the temperature measuring light 100. After the adjustment is completed, the first damping member 226 can be moved in the opposite direction so that the first protrusion 2262 is reset to be tightly pressed against the surface of the second mounting seat 222, thereby increasing the rotation resistance between the first mounting seat 221 and the second mounting seat 222, and reducing the risk of relative rotation of the first mounting seat 221 and the second mounting seat 222 when the angle of the temperature measuring light 100 does not need to be adjusted.

[0059] In some embodiments, referring to Figure 4 and Figure 5The first damping member 226 has a first protrusion 2262 and a first stud 2261 connected to the first protrusion 2262. The first protrusion 2262 protrudes from the first mounting seat 221 and presses against the surface of the second mounting seat 222. The first mounting seat 221 is provided with a first threaded hole. The first stud 2261 is threadedly connected to the first threaded hole, that is, the first protrusion 2262 is provided on the first mounting seat 221; by providing the first protrusion 2262, the first protrusion 2262 can provide resistance to the relative rotation between the first mounting seat 221 and the second mounting seat 222, and the first protrusion 2262 is pressed against the surface of the second mounting seat 222. The friction force formed by the friction between the first protrusion 2262 and the second mounting seat 222 can be converted into the friction between the first mounting seat 221 and the second mounting seat 222. The rotational resistance between the second mounting seat 222 can reduce the risk of relative rotation between the first mounting seat 221 and the second mounting seat 222 when there is no need to adjust the angle of the temperature measuring light 100; by setting the first stud 2261 to be threadedly connected to the first mounting seat 221, when the first stud 2261 is screwed, the first stud 2261 will move along its axial direction, so that the relative position of the first protrusion 2262 and the second mounting seat 222 can be adjusted by adjusting the depth of the first stud 2261 screwed into the first mounting seat 221, thereby pressing the first protrusion 2262 against the surface of the second mounting seat 222 to provide resistance, or separating the first protrusion 2262 from the surface of the second mounting seat 222, so that the size of the resistance can be easily adjusted.

[0060] In some embodiments, the first damping member 226 is disposed on the second mounting seat 222, the second mounting seat 222 is provided with a second threaded hole, the first stud 2261 is threadedly connected to the second threaded hole, and the first protrusion 2262 is pressed against the surface of the first mounting seat 221. In this embodiment, the first protrusion 2262 can also be disposed on the second mounting seat 222, that is, the first protrusion 2262 protrudes from the second mounting seat 222 and presses against the surface of the first mounting seat 221. The location of the first protrusion 2262 can be selected as needed and is not limited in this embodiment.

[0061] Of course, in other embodiments, the first damping member 226 may not be provided. For example, the first mounting seat 221 and the second mounting seat 222 may be connected using bolts and nuts. In this case, mounting holes may be respectively provided on the first mounting seat 221 and the second mounting seat 222. The bolts pass through the two mounting seats so that the mounting holes and the nuts are screwed. When the nuts are tightened, the nuts and the nuts of the bolts may be pressed against the two mounting seats to achieve position fixation between the two mounting seats. When the nuts are loosened, the two mounting seats may rotate relative to each other to achieve rotation between the two mounting seats to adjust the light emitting direction of the second light emitting portion 21.

[0062] Continue to refer to Figure 5In this embodiment, the first mounting seat 221 and the second mounting seat 222 are hinged by a first rotating shaft 224, and the second mounting seat 222 can rotate around the central axis (i.e., the first axis) of the first rotating shaft 224. A first connecting hole can be set on the first mounting seat 221, and a second connecting hole can be set on the second mounting seat 222. The first rotating shaft 224 is set through the first connecting hole and the second connecting hole.

[0063] Continue to refer to Figure 5 The first mounting seat 221 is provided with a groove, the first connecting hole and the first threaded hole both pass through the side wall of the groove, the second mounting seat 222 is provided with a connecting portion 2221, the second connecting hole is provided on the connecting portion 2221, the connecting portion 2221 is inserted into the groove, the first damping member 226 is coaxially arranged with the first rotating shaft 224, and the first protrusion 2262 of the first damping member 226 is tightly pressed against the surface of the connecting portion 2221 of the second mounting seat 222.

[0064] In this embodiment, the first protrusion 2262 is hemispherical, and the surface of the connecting portion 2221 of the second mounting seat 222 is provided with a recess, and the inner wall of the recess fits with the surface of the first protrusion 2262. This can increase the contact area between the first damping member 226 and the second mounting seat 222, thereby dispersing the force between the first damping member 226 and the second mounting seat 222, thereby reducing the stress formed by the first damping member 226 and the second mounting seat 222, which is beneficial to reducing the wear caused by the relative movement between the first damping member 226 and the second mounting seat 222.

[0065] Reference Figures 4 to 6 The angle adjustment assembly 22 further includes a third mounting seat 223 rotatably connected to the second mounting seat 222. The second mounting seat 222 is connected to the second light emitting portion 21 via the third mounting seat 223. The second mounting seat 222 rotates about a first axis (i.e., the central axis of the first rotating shaft 224), and the third mounting seat 223 rotates about a second axis, with the first axis and the second axis forming an angle. By setting the first axis and the second axis at an angle, the degree of freedom of the second light emitting portion 21 can be increased, thereby increasing the angle adjustment range of the second light emitting portion 21. This allows the temperature measurement light 100 emitted by the second light emitting portion 21 to intersect with the focal point of the laser when using different field lenses 121.

[0066] In this embodiment, the third mounting seat 223 and the second mounting seat 222 are hinged by the second rotating shaft 225, and the third mounting seat 223 can rotate around the central axis of the second rotating shaft 225 (that is, the second axis); a third connecting hole is provided on the second mounting seat 222, and a fourth connecting hole is provided on the third mounting seat 223, and the second rotating shaft 225 is arranged through the third connecting hole and the fourth connecting hole.

[0067] A second damping member 227 is provided between the second mounting seat 222 and the third mounting seat 223. The second damping member 227 is clamped between the second mounting seat 222 and the third mounting seat 223 to increase the resistance to the relative rotation of the second mounting seat 222 and the third mounting seat 223. It is understandable that during the laser cleaning process, the laser cleaning head needs to be constantly moved to adjust the relative position of the laser cleaning head and the object. During the movement, the laser cleaning head will shake. Therefore, the provision of the second damping member 227 can increase the resistance to the relative rotation of the second mounting seat 222 and the third mounting seat 223, thereby reducing the risk of relative rotation of the second mounting seat 222 and the third mounting seat 223 when there is no need to adjust the angle of the temperature measuring light 100.

[0068] In this embodiment, the second rotating shaft 225 is fixed to the third mounting seat 223, and the second damping member 227 is disposed on the second mounting seat 222. The second mounting seat 222 is provided with a third threaded hole that communicates with the third connecting hole. The second damping member 227 includes a second stud 2271 and a second protrusion 2272 disposed at the end of the second stud 2271. The second stud 2271 is threadedly connected to the third threaded hole, and the second protrusion 2272 abuts against the second rotating shaft 225. This increases the resistance to the relative rotation of the second mounting seat 222 and the third mounting seat 223, thereby reducing the possibility of the second mounting seat 222 and the third mounting seat 223 rotating relative to each other due to unexpected reasons. Of course, in other embodiments, the second damping member 227 may not be provided, for example, the second mounting seat 222 and the third mounting seat 223 may be connected using bolts and nuts.

[0069] In this embodiment, a lock hole 2231 connected to the fourth connecting hole is provided on the third mounting seat 223, and a lock groove 2251 is provided on the surface of the second rotating shaft 225. The pin can be inserted into the lock hole 2231 and the lock groove 2251 to achieve relative fixation between the second rotating shaft 225 and the third mounting seat 223.

[0070] Reference Figure 6 and Figure 7 The second protrusion 2272 is hemispherical, and a ring groove 2252 is provided on the outer circumference of the second rotating shaft 225. The inner wall of the ring groove 2252 fits with the surface of the second protrusion 2272. This can increase the contact area between the second damping member 227 and the second rotating shaft 225, disperse the force between the second damping member 227 and the second rotating shaft 225, thereby reducing the stress formed by the second damping member 227 and the second rotating shaft 225, and helping to reduce the wear caused by the relative movement between the second damping member 227 and the second rotating shaft 225.

[0071] Reference Figure 1 、 Figure 2 、 Figure 8 、 Figure 10 and Figure 11 The cleaning head body 1 includes a housing 11 on which a first light exit portion 12 is mounted. The housing 11 is provided with a first chamber 111 and a first opening 112 communicating with the first chamber 111. The second light exit portion 21 is provided at the first opening 112, and at least a portion of the second light exit portion 21 is located within the first chamber 111. By providing the first chamber 111 within the housing 11 and disposing at least a portion of the second light exit portion 21 within the first chamber 111, the housing 11 can partially shield the second light exit portion 21, thereby providing protection for the second light exit portion 21.

[0072] In this embodiment, the temperature measuring light 100 is invisible light, and the temperature measuring unit 2 further includes a third light emitting portion, which is configured to emit visible temperature measuring indicator light to mark the light emitting direction of the temperature measuring light 100. By providing the third light emitting portion, the visible temperature measuring indicator light emitted by the third light emitting portion can mark the light emitting direction of the temperature measuring light 100, thereby facilitating adjustment of the angle adjustment component 22 to adjust the light emitting direction of the temperature measuring light 100.

[0073] Two third light emitting parts can be provided, and the two third light emitting parts are respectively located on both sides of the second light emitting part 21. In this way, the temperature measuring light 100 can be located between the two temperature measuring indicator lights, and the area between the two temperature measuring indicator lights is the area where the temperature measuring light 100 is located.

[0074] Exemplarily, the temperature measuring unit 2 is an infrared temperature measuring unit with a temperature detection range of -50°C to +520°C. The temperature measuring light 100 emitted by the second light emitting portion 21 of the temperature measuring unit 2 is infrared light, and the temperature indicator light can be red visible light. The laser cleaning head can be used in laser cleaning equipment, which can be equipped with an amplifier. The data obtained by the temperature measuring unit 2 from measuring the surface temperature of an object can be fed back and displayed on the amplifier, thereby measuring the temperature of the object in real time. Of course, in other embodiments, the temperature measuring light 100 can also be Raman scattering light, fluorescent light, or light of other specific wavelengths.

[0075] In this embodiment, before the cleaning operation, it is necessary to first confirm the position of the focus of the laser so as to determine the optimal distance between the laser cleaning head and the surface of the object during the cleaning operation; after the optimal distance between the laser cleaning head and the surface of the object is confirmed, the position of the laser cleaning head and the surface of the object is adjusted according to the focus information of the laser. However, during this adjustment process, in order to avoid laser damage to the surface of the object, the first light output part 12 needs to be in a closed state, that is, the laser is in a closed state, and the position adjustment of the laser cleaning head and the surface of the object is completed by the naked eye. It is difficult to ensure that the focus of the laser can accurately fall on the surface of the object.

[0076] Based on this, the laser cleaning head also includes a focus indication unit, which includes a fourth light output part and a fifth light output part 13. The fourth light output part is used to emit a first focus indication light, and the fifth light output part 13 is used to emit a second focus indication light 200. The first focus indication light and the second focus indication light 200 are at an angle, and the first focus indication light and the second focus indication light 200 intersect with the focus of the laser.

[0077] In this embodiment, the first focus indicator light and the second focus indicator light 200 are both visible light; before the cleaning operation, the laser cleaning head can be set in a test area, and the first light emitting part 12 and the focus indicator unit are turned on in the test area, so that the first light emitting part 12 emits laser. During this process, the light emitting directions of the first focus indicator light and the second focus indicator light 200 can be adjusted so that the first focus indicator light and the second focus indicator light 200 intersect with the focus of the laser, thereby marking the focus position of the laser. Then, the first light emitting part 12 is closed, and the laser cleaning head is moved to a working area where an object to be cleaned is provided. In the working area, the position between the laser cleaning head and the object is adjusted with the assistance of the first focus indicator light and the second focus indicator light 200, so that the intersection of the first focus indicator light and the second focus indicator light 200 falls on the surface of the object, thereby ensuring that the focus of the laser falls on the surface of the object.

[0078] In this embodiment, since the focal length of the laser will change with the replacement of the field lens 121, a focus indication unit is provided, and the focus of the laser can be marked with visible light, thereby facilitating the control of the distance between the laser cleaning head and the object during the cleaning operation, thereby facilitating the cleaning operation and improving the cleaning quality.

[0079] In this embodiment, the fourth light emitting portion is arranged inside the first light emitting portion 12, and the fifth light emitting portion 13 is arranged outside the first light emitting portion 12. The fifth light emitting portion 13 is rotatably connected to the housing 11, such as by a hinge, and the second focus indicator light 200 forms an angle with the first focus indicator light. The intersection of the second focus indicator light 200 and the first focus indicator light is used to mark the focal position of the laser. For example, a second chamber can be provided in the housing 11, and a second opening communicating with the second chamber is provided on the surface of the housing 11. A protective plate is provided at the second opening, and the protective plate can be connected to the housing 11 by screws. The fifth light emitting portion 13 is provided at the second opening and passes through the through hole on the protective plate, and a portion of the fifth light emitting portion 13 is located in the second chamber. Before the cleaning operation, when marking the laser focal position in the test area, the screws can be loosened, the protective plate can be removed, the light emitting direction of the fifth light emitting portion 13 can be adjusted, and the focal position of the laser can be marked. After the adjustment is completed, the protective plate and screws can be reinstalled.

[0080] In this embodiment, a galvanometer 14 and a motor 15 connected to the galvanometer 14 are provided in the shell 11. The laser cleaning head also includes a gripping handle 3 connected to the shell 11 of the cleaning head body 1. The gripping handle 3 is provided at one end away from the laser cleaning head with a fixing portion 31 for connecting to the device body of the laser cleaning device. The light generated by the device body is emitted into the shell 11 through the gripping handle 3, and is reflected by the galvanometer 14 to the field lens 121 of the first light output part 12. The light is focused by the field lens 121 to form a focused light beam, which is emitted by the first light output part 12. In this embodiment, the light beam contains multiple lasers.

[0081] Driven by the motor 15, the galvanometer 14 will generate a small amplitude vibration, so that the point light will swing to form a linear light. The linear light is focused by the field lens 121 to form a high-energy light beam. The light beam contains multiple parallel lasers, which can increase the cleaning range of the laser cleaning head.

[0082] Reference Figure 2 、 Figure 3 、 Figure 8 and Figure 9 The laser cleaning head also includes an air blowing unit, which includes an air outlet 114 provided on the cleaning head body 1 and an air channel 113 provided inside the cleaning head body 1. The air outlet 114 is provided around the first light outlet portion 12 and faces the object, and the air channel 113 is connected to the air outlet 114. By providing the air blowing unit, the gas blown out of the air outlet 114, on the one hand, forms an airflow flowing toward the object, thereby reducing the probability of dust adhering to the first light outlet portion 12, and on the other hand, the airflow can blow off the dust on the surface of the object, reducing the amount of dust on the surface of the object.

[0083] In addition, an air passage 113 is provided within the cleaning head body 1. As the gas flows through the air passage 113, it absorbs heat from the cleaning head body 1. When the gas is blown out from the air outlet 114, the absorbed heat is removed from the cleaning head body 1. Thus, the air blowing unit can also cool the cleaning head body 1, reducing the risk of overheating of the laser cleaning head. In this embodiment, the laser cleaning equipment is further provided with an air compressor, and the end of the air passage 113 away from the air outlet 114 is connected to the air compressor.

[0084] In addition, by arranging the air outlet 114 at the periphery of the first light exit portion 12 , the air outlet 114 can be adjacent to the first light exit portion 12 , thereby reducing the probability of dust adhering to the first light exit portion 12 .

[0085] In this embodiment, the air passage 113 is disposed inside the housing 11 .

[0086] In this embodiment, a plurality of air outlets 114 are provided, and the plurality of air outlets 114 are arranged in an array; by increasing the number of air outlets 114 , the blowing range of the blowing unit can be increased, thereby improving the dust blowing effect.

[0087] In this embodiment, a switch button 16 and a switch indicator light 17 are provided on the shell 11. The switch button 16 and the switch indicator light 17 are respectively connected to the controller of the laser cleaning equipment. The switch button 16 is used to control the opening and closing of the laser, and the switch indicator light 17 is used to indicate whether the laser is in the on state or in the off state. During the laser opening process, the temperature measuring unit 2 is turned on synchronously to perform real-time temperature measurement on the surface of the object.

[0088] This embodiment further provides a laser cleaning device, comprising a device body and a laser cleaning head according to any of the above embodiments, the laser cleaning head being mounted on the device body. Because the temperature measuring unit 2 of the laser cleaning head can measure the temperature of the laser-cleaned area on the surface of an object in real time, ensuring that the temperature of the laser-cleaned area is within an appropriate range, the laser cleaning device including this laser cleaning head has a low probability of damaging the surface of the object due to excessive temperature. Furthermore, the movement speed of the laser cleaning head can be controlled based on real-time temperature measurement data, allowing dirt on the surface of the object to fully absorb the laser energy and be removed. Consequently, the laser cleaning device has excellent cleaning quality.

[0089] The method of using the laser cleaning equipment of this embodiment is as follows:

[0090] Before the cleaning operation, it is necessary to mark the focus of the laser in a test area. First, turn on the focus indication unit, the first light emitting part 12 and the temperature measuring unit 2, adjust the light emitting direction of the first focus indication light and the second focus indication light 200 to mark the focus position of the laser, and adjust the light emitting direction of the second light emitting part 21 according to the focus position. Then turn off the focus indication unit, the first light emitting part 12 and the temperature measuring unit 2, move the laser cleaning head to the working area, turn on the focus indication unit alone, and perform auxiliary focusing according to the first focus indication light and the second focus indication light 200 emitted by the focus indication unit, so that the first focus indication light and the second focus indication light The focus indication light 200 coincides with the landing point on the surface of the object, which means that the focus of the laser falls on the surface of the object and the cleaning effect is optimal. Then, when the switch button 16 is pressed, the switch indicator light 17 will change from a green light to a red light. At this time, the first light output part 12 is turned on and emits a laser. At the same time, the temperature measuring unit 2 will emit invisible infrared light to measure the temperature of the object surface. The measured temperature is displayed on the amplifier of the equipment body. The air compressor in the equipment body and the laser of the first light output part 12 are turned on synchronously, and the air outlet 114 of the laser cleaning head is blown to blow away dust to prevent contamination of the field lens 121, and at the same time, it can have a cooling effect on the inside of the laser cleaning head.

[0091] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A laser cleaning head, characterized in that: The cleaning head body includes a cleaning head body and a temperature measuring unit arranged on the cleaning head body. The cleaning head body has a first light emitting portion, which is used to emit laser to clean dirt on the surface of an object. The temperature measuring unit has a second light emitting portion, which is used to emit temperature measuring light to the surface of the object to measure the temperature of the surface of the object. The landing point of the temperature measuring light on the surface of the object coincides with the landing point of the laser on the surface of the object.

2. The laser cleaning head according to claim 1, characterized in that The temperature measuring unit includes an angle adjustment component, and the second light emitting portion is connected to the cleaning head body through the angle adjustment component. The angle adjustment component is used to adjust the light emitting direction of the second light emitting portion.

3. The laser cleaning head according to claim 2, characterized in that: The angle adjustment assembly includes a first mounting seat and a second mounting seat rotatably connected to the first mounting seat, the first mounting seat is connected to the cleaning head body, and the second mounting seat is connected to the second light output portion.

4. The laser cleaning head according to claim 3, characterized in that: A first damping member is provided between the first mounting seat and the second mounting seat, and the first damping member is clamped between the first mounting seat and the second mounting seat to increase the resistance to the mutual rotation of the first mounting seat and the second mounting seat.

5. The laser cleaning head according to claim 4, characterized in that: The first damping member has a first protrusion and a first stud connected to the first protrusion. The first protrusion protrudes from the first mounting seat and presses against the surface of the second mounting seat. The first mounting seat is provided with a first threaded hole. The first stud is threadedly connected to the first threaded hole.

6. The laser cleaning head according to claim 3, characterized in that: The angle adjustment assembly also includes a third mounting seat rotatably connected to the second mounting seat, the second mounting seat is connected to the second light-emitting portion through the third mounting seat, the second mounting seat rotates around the first axis, and the third mounting seat rotates around the second axis, and the first axis and the second axis form an angle.

7. The laser cleaning head according to claim 6, characterized in that: A second damping member is provided between the second mounting seat and the third mounting seat, and the second damping member is clamped between the second mounting seat and the third mounting seat to increase the resistance to the mutual rotation of the second mounting seat and the third mounting seat.

8. The laser cleaning head according to any one of claims 1 to 7, characterized in that: The temperature measuring light is invisible light, and the temperature measuring unit further includes a third light emitting portion, the third light emitting portion being configured to emit visible temperature measuring indicator light to mark the light emitting direction of the temperature measuring light; and / or, The laser cleaning head also includes a focus indication unit, which includes a fourth light output portion and a fifth light output portion. The fourth light output portion is used to emit a first focus indication light, and the fifth light output portion is used to emit a second focus indication light. The first focus indication light and the second focus indication light form an angle, and the first focus indication light and the second focus indication light intersect with the focus of the laser.

9. The laser cleaning head according to any one of claims 1 to 7, characterized in that: The laser cleaning head also includes an air blowing unit for spraying gas onto the surface of the object, the air blowing unit includes an air outlet arranged on the cleaning head body and an air duct arranged inside the cleaning head body, the air outlet is arranged on the periphery of the first light output portion and faces the object, and the air duct is connected to the air outlet.

10. A laser cleaning device, comprising a device body, characterized in that: The laser cleaning device further comprises a laser cleaning head as described in any one of claims 1 to 9, and the laser cleaning head is mounted on the device body.

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