Laser cleaning head and laser cleaning machine

Abstract

The invention provides a laser cleaning head which comprises a cleaning body and a lens module, the cleaning body is provided with a laser inlet, a laser outlet, a mounting cavity, a mounting groove and a fixing part, and the laser inlet and the laser outlet both communicate with the mounting cavity; the fixing part comprises a first end and a second end which are oppositely arranged along a first direction, and the first end is connected with the groove wall of the mounting groove; in the second direction, a first groove is formed in the groove wall of one side of the mounting groove, a second groove is formed in the fixing part, the first groove and the second groove are correspondingly formed, and a mounting space is defined by the first groove and the second groove; the lens module comprises a collimating lens, and the collimating lens is arranged in the installation space and the laser inlet in a penetrating mode. The invention further provides a laser cleaning machine. The beneficial effects of the invention are that the fixing part and the installation groove are matched to install the collimating mirror, and the collimating mirror can be installed more stably and accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cleaning, and in particular to a laser cleaning head and a laser cleaning machine. Background Art

[0002] Laser cleaning technology has the advantages of no pollution, no noise and high cleaning efficiency, and has been widely used in industrial production. Laser cleaning technology generally uses a laser cleaning machine for cleaning work. The laser cleaning machine needs to use a laser cleaning head. The laser cleaning head includes a collimator. The collimator is used to compress the divergence angle of the laser, so that the laser is transformed from a divergent state to a parallel state for transmission. Therefore, the stability and accuracy of the collimator installation have a great influence on the transmission of the laser.

[0003] However, the existing laser cleaning head has the problem that when installing the collimating lens, installation errors such as offset and tilt are easily generated between the axis of the collimating lens and the axis of the laser inlet, which will affect the cleaning accuracy of the laser cleaning head.

[0004] Therefore, it is necessary to study a laser cleaning head and a laser cleaning machine to solve the above problems or alleviate the impact of the above problems. Summary of the invention

[0005] On one hand, the present invention provides a laser cleaning head, which can achieve more stable and accurate installation of the collimating mirror by cooperating with a fixing part and a mounting groove to effectively solve the above problems or alleviate the impact of the above problems.

[0006] The laser cleaning head of the present invention may include a cleaning body and a lens module, wherein the cleaning body is provided with a laser inlet, a laser outlet, a mounting cavity, a mounting groove and a fixing portion, and the laser inlet and the laser outlet are both connected to the mounting cavity;

[0007] The fixing portion includes a first end and a second end that are oppositely arranged along a first direction, and the first end is connected to a groove wall of the mounting groove; along the second direction, a first groove is provided on one side of the groove wall of the mounting groove, and the fixing portion is provided with a second groove, the first groove and the second groove are arranged correspondingly, and the first groove and the second groove enclose an installation space; along the third direction, the installation space is located on one side of the laser entrance and is connected to the laser entrance; the first direction, the second direction and the third direction are perpendicular to each other;

[0008] The lens module includes a collimator lens, which is inserted into the installation space and the laser inlet. The shapes of the first groove and the second groove are adapted to the shape of the outer peripheral wall of the collimator lens.

[0009] In one embodiment, the laser cleaning head further comprises a first through hole and a locking member;

[0010] Among them, the first through hole passes through the cleaning body along the second direction and is connected to the installation groove, the first through hole is located on the side of the fixing part away from the second groove, and the first through hole is arranged corresponding to the second end of the fixing part; the locking piece is configured to be penetrated in the first through hole and abut against the second end, and the locking piece can move relative to the cleaning body along the second direction to drive a part of the fixing part to approach or move away from the first groove.

[0011] In one embodiment, the lens module further comprises a reflector, a galvanometer and a focusing mirror, wherein the focusing mirror is disposed at the laser outlet, the reflector is located in the mounting cavity, and at least a portion of the galvanometer is located in the mounting cavity;

[0012] The collimating mirror, the reflecting mirror, the galvanometer mirror and the focusing mirror are configured to be arranged in sequence along the transmission direction of the laser to jointly define a laser path.

[0013] In one embodiment, the galvanometer includes a first lens and a driving unit, the first lens is connected to the driving unit, the cleaning body also includes a second through hole, the second through hole passes through the cleaning body, the galvanometer passes into the installation cavity through the second through hole, the first lens is located in the installation cavity, and the driving unit is located outside the installation cavity.

[0014] In one embodiment, the lens module further includes a protective mirror, which is installed at the laser outlet and is located on a side of the focusing mirror away from the installation cavity along the third direction.

[0015] In one embodiment, the laser cleaning head includes two laser inlets, and the lens module includes a continuous collimator and a pulse collimator. The continuous collimator is disposed in one of the laser inlets along the third direction, and the pulse collimator is disposed in the other laser inlet.

[0016] In one embodiment, the cleaning body is further provided with a cooling inlet, a cooling outlet and a first channel, the cooling inlet is connected to the first channel, the cooling outlet is connected to the first channel, the first channel is arranged adjacent to the installation cavity, and the first channel and the installation cavity are arranged independently of each other.

[0017] In one embodiment, the lens module further comprises a mounting seat, the mounting seat is located in the mounting cavity, and the mounting seat is provided with a second channel;

[0018] The first passage includes a first through section and a second through section, one end of the first through section is connected to the cooling inlet, the other end of the first through section is connected to the second passage, one end of the second through section is connected to the second passage, and the other end of the second through section is connected to the cooling outlet.

[0019] In one embodiment, the first channel further includes a third through section, one end of the third through section is connected to the first through section, and the other end of the third through section is connected to the second through section.

[0020] Another aspect of the present invention provides a laser cleaning machine, which includes a laser source and the laser cleaning head as described above, wherein the laser source transmits laser light to the laser cleaning head via an optical fiber.

[0021] Compared with the prior art, the laser cleaning head provided by the present invention has at least the following beneficial effects:

[0022] The laser cleaning head of the present invention forms an installation space that matches the shape of the outer peripheral wall of the collimator lens through the cooperation of the fixing part and the installation groove, so that the collimator lens can be installed on the cleaning body more stably and accurately to avoid installation errors such as offset and tilt between the axis of the collimator lens and the axis of the laser inlet. In this way, the laser cleaning head can achieve a higher precision cleaning operation, which is beneficial to improving the cleanliness and cleaning efficiency of laser cleaning.

[0023] A laser cleaning machine provided by the present invention also has the above-mentioned beneficial effects because it includes the above-mentioned laser cleaning head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0025] Figure 1 is a structural schematic diagram of a laser cleaning head according to an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of a laser cleaning head part of an embodiment of the present invention;

[0027] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0028] Figure 4 is a front view of a laser cleaning head according to an embodiment of the present invention;

[0029] Figure 5 It is a side view of a laser cleaning head according to an embodiment of the present invention;

[0030] Figure 6 A top view of a laser cleaning head according to an embodiment of the present invention;

[0031] Figure 7 This is a front view of the cleaning body according to an embodiment of the present invention;

[0032] Figure 8 for Figure 7 Sectional view at AA in the middle;

[0033] Fig. 9 It is a schematic structural diagram of a mounting base according to an embodiment of the present invention.

[0034] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0035] Reference numerals:

[0036] 100-cleaning body, 110-laser inlet, 120-laser outlet, 130-installation cavity, 140-installation groove, 141-first groove, 150-fixing part, 151-first end, 152-second end, 153-second groove,

[0037] 160 - first through hole, 170 - locking piece, 180 - second through hole, 191 - cooling inlet, 192 - cooling outlet, 193 - first channel, 1931 - first through section, 1932 - second through section, 1933 - third through section,

[0038] 200-lens module, 211-continuous collimator, 212-pulse collimator, 220-reflector, 221-second lens, 222-mounting seat, 2221-second channel, 230-galvanometer, 231-first lens, 232-driving unit,

[0039] 300 - air path module, 310 - air blowing member, 311 - first air hole. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] Example 1

[0042] refer to Figures 1 to 4 The laser cleaning head of the present invention comprises a cleaning body 100 and a lens module 200. The cleaning body 100 is provided with a laser inlet 110, a laser outlet 120 and a mounting cavity 130. The laser inlet 110 and the laser outlet 120 are both connected to the mounting cavity 130. The lens module 200 is used to define a laser path and is at least partially mounted in the mounting cavity 130, guiding the laser from the laser inlet 110 into the mounting cavity 130, and then transmitted from the mounting cavity 130 to the laser outlet 120 for emission.

[0043] The cleaning body 100 also includes a mounting groove 140 and a fixing part 150. The fixing part 150 includes a first end 151 and a second end 152 which are relatively set along the first direction, the first end 151 is connected to the side wall of the mounting groove 140, and the fixing part 150 is spaced apart from the groove wall of the mounting groove 140 at a portion other than the first end 151, so as to ensure that the fixing part 150 is connected to the groove wall of the mounting groove 140, and a part of the fixing part 150 can produce elastic deformation. Along the second direction, a first groove 141 is provided on one side of the groove wall of the mounting groove 140, and the fixing part 150 is provided with a second groove 153, the first groove 141 and the second groove 153 are correspondingly arranged, and the first groove 141 and the second groove 153 are enclosed to form an installation space. Along the third direction, the installation space is located on one side of the laser entrance 110, and the installation space is connected to the laser entrance 110. The first direction, the second direction and the third direction are perpendicular to each other.

[0044] The lens module 200 includes a collimator, which is arranged in the installation space and the laser entrance 110 along the third direction. For example, along the third direction, the installation space is located on the side of the laser entrance 110 away from the installation cavity 130, and the collimator needs to pass through the installation space and the laser entrance 110 in sequence when assembling the cleaning body 100. The shapes of the first groove 141 and the second groove 153 are adapted to the shape of the outer wall of the collimator, and the first groove 141 is used to provide a positioning reference for the installation of the collimator. For example, the outer wall of the collimator is cylindrical, and the groove walls of the first groove 141 and the second groove 153 are cylindrical surfaces adapted to the shape of the outer wall of the collimator, and the groove walls of the first groove 141 and the second groove 153 can fit the outer wall of the collimator, which is beneficial to improve the stability and accuracy of the installation of the collimator.

[0045] In general, the laser cleaning head of the present invention cooperates with the fixing portion 150 and the mounting groove 140 to form an installation space that matches the shape of the outer peripheral wall of the collimator lens, so that the collimator lens can be more stably and accurately installed on the cleaning body 100 to avoid installation errors such as offset and tilt between the axis of the collimator lens and the axis of the laser inlet. In this way, the laser cleaning head can achieve a higher precision cleaning operation, which is beneficial to improving the cleanliness and cleaning efficiency of laser cleaning.

[0046] refer to Figures 1 to 4In one example, the laser cleaning head further includes a first through hole 160 and a locking member 170. The first through hole 160 penetrates the cleaning body 100 along the second direction and communicates with the mounting groove 140. The first through hole 160 is located on the side of the fixing portion 150 away from the second groove 153, and the first through hole 160 is arranged toward the second end 152. The locking member 170 is configured to penetrate the first through hole 160 and abut against the second end 152, and the locking member 170 can move relative to the cleaning body 100 along the second direction to drive a part of the fixing portion 150 to approach or move away from the first groove 141.

[0047] In this way, through the driving of the locking member 170, a part of the fixing portion 150 is elastically deformed to be close to the first groove 141, and the groove walls of the first groove 141 and the second groove 153 abut against the outer peripheral wall of the collimator, so that the collimator is installed and fixed, and the collimator can be installed more stably and accurately. In addition, when installing the collimator, the size of the installation space can be adjusted by the locking member 170, so as to improve the adaptability of the installation of collimators of different diameters.

[0048] It should be noted that the locking member 170 can be a bolt, the first through hole 160 is a threaded hole, the locking member 170 is connected to the first through hole 160 of the cleaning body 100 by threads, and the two rotate relative to each other with the second direction as the axis, so that the locking member 170 moves relative to the cleaning body 100 along the second direction, thereby driving a part of the fixing part 150 to produce elastic deformation to cooperate with the first groove 141 to fix the collimator. In addition, the part passing through the laser outlet 120 represents the laser transmission direction.

[0049] refer to Figures 1 to 4 In one example, the cleaning body 100 includes a main body and an end cover, the main body and the end cover are detachably connected, the main body and the end cover together define an installation cavity 130, at least a portion of the lens module 200 is located in the installation cavity 130, the end cover is used to close the installation cavity 130 to prevent dust and other impurities from invading the installation cavity 130, and the separate setting of the main body and the end cover facilitates the installation of the lens module 200.

[0050] refer to Figures 1 to 4In one example, the lens module 200 further includes a reflector 220, a galvanometer 230 and a focusing mirror (not shown in the drawings), the focusing mirror being installed at the laser outlet 120, and the reflector 220 and the galvanometer 230 being both located in the mounting cavity 130. The collimator, the reflector 220, the galvanometer 230 and the focusing mirror are configured to be arranged in sequence along the transmission direction of the laser to jointly define a laser path. The collimator is used to convert the divergent laser beam into a parallel beam to ensure that the laser can be accurately transmitted to the reflector 220, the reflector 220 is used to reflect the laser from the collimator, change the transmission direction of the laser, and reflect the laser to the galvanometer 230, the galvanometer 230 is used to receive the laser reflected by the reflector 220, and can control the cleaning range of the laser by deflection vibration. The focusing mirror is used to receive the light reflected by the galvanometer 230, and is used to further focus the laser, so that the laser can produce a stronger thermal effect at the target position, which is beneficial to improving the laser cleaning efficiency. Thus, by setting the above-mentioned lens, the overall performance of the laser cleaning head can be improved.

[0051] refer to Figure 5 and Figure 6 In one example, the galvanometer 230 includes a first lens 231 and a driving unit 232, the first lens 231 is connected to the driving unit 232, and the cleaning body 100 also includes a second through hole 180, the second through hole 180 penetrates the cleaning body 100, that is, the second through hole 180 is connected to the mounting cavity 130. The galvanometer 230 penetrates the mounting cavity 130 through the second through hole 180, the first lens 231 is located in the mounting cavity 130, and the driving unit 232 is located outside the mounting cavity 130, which is convenient for heat dissipation of the driving unit 232. The driving unit 232 can be a motor, which is used to drive the first lens 231 to deflect and vibrate. The separation of the first lens 231 and the driving unit 232 can prevent the heat generated by the driving unit 232 from accumulating in the mounting cavity 130, so as to reduce the influence of temperature on the first lens 231 and ensure the performance of the first lens 231.

[0052] refer to Figure 1 and Figure 2 In one example, the lens module 200 further includes a protective mirror (not shown in the drawings), which is installed at the laser outlet 120, and along the third direction, the protective mirror is located on the side of the focusing mirror away from the mounting cavity 130. The protective mirror allows the laser to pass through, and can block dust and other debris to prevent the focusing mirror from becoming dirty. The protective mirror cooperates with the focusing mirror to achieve double sealing at the laser outlet 120, which is beneficial to improving the sealing of the mounting cavity 130, preventing the portion of the lens module 200 in the mounting cavity 130 from being contaminated, and is beneficial to ensuring the accuracy of laser transmission.

[0053] refer to Figures 1 to 4In one example, the laser cleaning head includes two laser inlets 110, and the lens module 200 includes a continuous collimator 211 and a pulse collimator 212. The continuous collimator 211 is disposed in one of the laser inlets 110 along the third direction, and the pulse collimator 212 is disposed in the other laser inlet 110. The continuous collimator 211 is used to connect a continuous laser light source through an optical fiber, and the pulse collimator 212 is used to connect a pulse laser light source through an optical fiber, so that the laser cleaning head has a continuous cleaning mode and a pulse cleaning mode. For example, in the continuous cleaning mode, a higher-power continuous laser can be used for large-area cleaning, and in the pulse cleaning mode, a lower-power pulse laser can be used to further clean a local area of ​​the workpiece. In this way, different cleaning modes can be selected according to different cleaning objects and cleaning conditions, which is beneficial to improving the flexibility and applicability of the cleaning operation of the laser cleaning head.

[0054] refer to Figures 1 to 8 In one example, the cleaning body 100 is further provided with a cooling inlet 191, a cooling outlet 192 and a first channel 193. The cooling inlet 191 is communicated with the first channel 193, and the cooling outlet 192 is communicated with the first channel 193. The cooling liquid can be introduced into the first channel 193 through the cooling inlet 191, and the cooling liquid flows along the extension direction of the first channel 193 until it flows out from the cooling outlet 192. The first channel 193 is arranged adjacent to the mounting cavity 130, and the first channel 193 and the mounting cavity 130 are arranged independently of each other. When the cooling liquid flows in the first channel 193, it can take away the heat accumulated in the mounting cavity 130 during the cleaning operation of the laser cleaning head, and prevent the cleaning liquid from invading the mounting cavity 130, which is beneficial to reduce the temperature of the laser cleaning head and prevent the performance of the laser cleaning head from being affected by excessive temperature.

[0055] refer to Figures 1 to 9 In one example, the lens module 200 further includes a mounting seat 222, which can be used to mount the second lens 221 of the reflector, and the mounting seat 222 is located in the mounting cavity 130. The mounting seat 222 is provided with a second channel 2221. The first channel 193 includes a first through section 1931 and a second through section 1932, one end of the first through section 1931 is connected to the cooling inlet 191, the other end of the first through section 1931 is connected to the second channel 2221, one end of the second through section 1932 is connected to the second channel 2221, and the other end of the second through section 1932 is connected to the cooling outlet 192. Thus, the coolant can flow through the cooling inlet 191, the first through section 1931, the second channel 2221, the second through section 1932 and the cooling outlet 192 in sequence. The cooling inlet 191 and the cooling outlet 192 are used to connect a water pump circulation device, and liquid cooling circulation can be achieved through the water pump circulation device. The circulation path passes through the mounting seat 222, which can improve the cooling effect of the laser cleaning head, directly take away the heat generated by the reflector, and further improve the cooling efficiency of the laser cleaning head.

[0056] refer to Figures 1 to 9 In one example, the first channel 193 further includes a third through section 1933, one end of the third through section 1933 is connected to the first through section 1931, and the other end of the third through section 1933 is connected to the second through section 1932. On the basis of the liquid cooling cycle, by adding the third through section 1933, a circulation path of the cooling inlet 191, the first through section 1931, the third through section 1933, the second through section 1932 and the cooling outlet 192 can be realized. Thus, the laser cleaning head has two cooling circulation paths at the same time. At one end of the first through section 1931 away from the cooling inlet 191, a part of the coolant flows to the second channel 2221 for cooling the mounting seat 222, and another part of the coolant flows to the third through section 1933 for increasing the cooling area, which can more quickly take away the heat generated by the laser cleaning head, and further improve the cooling efficiency of the laser cleaning head.

[0057] refer to Figures 1 to 9 In one example, the laser cleaning head further includes an air circuit module 300, which is connected to the cleaning body 100. The air circuit module 300 includes an air blowing member 310 and a dust extracting member (not shown in the figure). The air blowing member 310 is provided with a first air hole 311, and the dust extracting member is provided with a second air hole. The first air hole 311 and the second air hole are both arranged toward the side of the laser outlet 120 away from the installation cavity 130 along the third direction. The air blowing member 310 is used to blow away the debris generated by laser cleaning in time to prevent the debris from blocking the surface of the workpiece to be cleaned. The dust extracting member is used to suck the debris generated by laser cleaning, which is beneficial to ensure the cleanliness of the workpiece surface. The air blowing member 310 blows the debris and also facilitates the suction of the dust extracting member.

[0058] It should be noted that the laser is emitted from the laser outlet 120 along the third direction, and the workpiece to be cleaned is placed on the side of the laser outlet 120 away from the mounting cavity 130. Therefore, the first air hole 311 and the second air hole are both arranged toward the side of the laser outlet 120 away from the mounting cavity 130, which is beneficial for more timely processing of debris generated by laser cleaning, thereby improving the efficiency of laser cleaning.

[0059] Example 2

[0060] refer to Figures 1 to 9 The laser cleaning machine of the present invention includes a laser source and a laser cleaning head of any one of the examples in the above-mentioned embodiment 1. The laser source is used to emit laser and transmit the laser to the laser cleaning head through an optical fiber. The laser cleaning head is used to guide the laser to perform laser cleaning operations on the workpiece.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A laser cleaning head, characterized in that: The laser cleaning head comprises a cleaning body and a lens module, wherein the cleaning body is provided with a laser inlet, a laser outlet, a mounting cavity, a mounting groove and a fixing portion, and the laser inlet and the laser outlet are both connected to the mounting cavity; The fixing portion includes a first end and a second end that are oppositely arranged along a first direction, and the first end is connected to a groove wall of the mounting groove; along the second direction, a first groove is provided on one side of the groove wall of the mounting groove, and the fixing portion is provided with a second groove, the first groove and the second groove are arranged correspondingly, and the first groove and the second groove enclose an installation space; along the third direction, the installation space is located on one side of the laser entrance and is connected to the laser entrance; the first direction, the second direction and the third direction are perpendicular to each other; The lens module includes a collimator lens, which is inserted into the installation space and the laser inlet. The shapes of the first groove and the second groove are adapted to the shape of the outer peripheral wall of the collimator lens.

2. The laser cleaning head according to claim 1, characterized in that: The laser cleaning head also includes a first through hole and a locking member; Among them, the first through hole passes through the cleaning body along the second direction and is connected to the installation groove, the first through hole is located on the side of the fixing part away from the second groove, and the first through hole is arranged corresponding to the second end of the fixing part; the locking piece is configured to be penetrated in the first through hole and abut against the second end, and the locking piece can move relative to the cleaning body along the second direction to drive a part of the fixing part to approach or move away from the first groove.

3. The laser cleaning head according to claim 1, characterized in that: The lens module further includes a reflector, a galvanometer and a focusing mirror, wherein the focusing mirror is arranged at the laser outlet, the reflector is located in the mounting cavity, and at least a portion of the galvanometer is located in the mounting cavity; The collimating mirror, the reflecting mirror, the galvanometer mirror and the focusing mirror are configured to be arranged in sequence along the transmission direction of the laser to jointly define a laser path.

4. The laser cleaning head according to claim 3, characterized in that: The galvanometer includes a first lens and a driving unit, the first lens is connected to the driving unit, the cleaning body also includes a second through hole, the second through hole penetrates the cleaning body, the galvanometer passes through the second through hole into the installation cavity, the first lens is located in the installation cavity, and the driving unit is located outside the installation cavity.

5. The laser cleaning head according to claim 3, characterized in that: The lens module further comprises a protective mirror, which is installed at the laser outlet and is located on a side of the focusing mirror away from the installation cavity along the third direction.

6. The laser cleaning head according to claim 1, characterized in that: The laser cleaning head comprises two laser inlets, and the lens module comprises a continuous collimator and a pulse collimator. The continuous collimator is arranged in one of the laser inlets along the third direction, and the pulse collimator is arranged in the other laser inlet.

7. The laser cleaning head according to claim 1, characterized in that: The cleaning body is also provided with a cooling inlet, a cooling outlet and a first channel, the cooling inlet is communicated with the first channel, the cooling outlet is communicated with the first channel, the first channel is arranged adjacent to the installation cavity, and the first channel and the installation cavity are arranged independently of each other.

8. The laser cleaning head according to claim 7, characterized in that: The lens module further comprises a mounting seat, the mounting seat is located in the mounting cavity, and the mounting seat is provided with a second channel; The first passage includes a first through section and a second through section, one end of the first through section is connected to the cooling inlet, the other end of the first through section is connected to the second passage, one end of the second through section is connected to the second passage, and the other end of the second through section is connected to the cooling outlet.

9. The laser cleaning head according to claim 8, characterized in that: The first channel further includes a third through section, one end of the third through section is connected to the first through section, and the other end of the third through section is connected to the second through section.

10. A laser cleaning machine, characterized in that: The laser cleaning machine comprises a laser source and a laser cleaning head as claimed in any one of claims 1 to 9, wherein the laser source transmits laser light to the laser cleaning head via an optical fiber.

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