A coaxial on-line observation and blowing device suitable for laser processing machine tool

Abstract

The application discloses a coaxial on-line observation and blowing device suitable for a laser processing machine tool and relates to the field of laser processing equipment.The coaxial on-line observation and blowing device suitable for the laser processing machine tool comprises an on-line observation assembly, an illumination light source is arranged on the on-line observation assembly, and the illumination light source is used for realizing real-time observation on a laser beam focus point; a dichroic mirror assembly is arranged at the bottom of the on-line observation assembly, a galvanometer assembly is arranged on the side surface of the dichroic mirror assembly, and the side of the dichroic mirror assembly, which is far away from the galvanometer assembly, is used for connecting a machine tool laser beam outlet, so that the laser beam and the illumination light can be coaxially injected into the galvanometer assembly; and a light transmission assembly is arranged on the galvanometer assembly, so that the laser beam and the illumination light can be irradiated onto a workpiece. The application can realize real-time observation on the processing focus point of the laser beam on the workpiece, can timely adjust the processing focus point when deviation or ablation radius exceeds a threshold value, and thus the processing precision and the processing quality of the laser processing machine tool are improved.

Description

Technical Field

[0001] This invention relates to the field of laser processing equipment, and in particular to a coaxial online observation and air blowing device suitable for laser processing machine tools. Background Technology

[0002] A laser processing machine tool is a special type of machine tool that uses a laser beam to process materials. It uses a high-intensity laser beam to perform operations such as cutting, drilling, and welding on materials, and features high precision and high efficiency.

[0003] Currently, laser processing machine tools suffer from optical errors during workpiece processing. If the quality of optical path components is poor—for example, scratches on optical lenses or poor reflectivity of mirrors—it can lead to laser beam deflection or a poor focal point on the workpiece, thus affecting the quality of laser processing. Simultaneously, machine tool errors also exist. If, after prolonged operation, mechanical parts become loose or unbalanced, horizontal movement of the machine tool can cause a poor focal point for the laser beam on the workpiece, resulting in errors in laser processing. Therefore, existing laser processing machine tools suffer from reduced processing accuracy and quality due to both optical and machine tool errors. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the technical problem solved by the present invention is: how to improve the processing accuracy and processing quality of laser processing machine tools.

[0005] To achieve the above objectives, the present invention provides a coaxial online observation and air blowing device suitable for laser processing machine tools, comprising:

[0006] An online observation component is equipped with an illumination source to enable real-time observation of the laser beam focusing point;

[0007] The dichroic mirror assembly is located at the bottom of the online observation assembly, and a galvanometer assembly is located on its side. The side of the dichroic mirror assembly away from the galvanometer assembly is used to connect to the machine tool laser beam outlet so as to achieve coaxial input of the laser beam and illumination light into the galvanometer assembly.

[0008] An optical transmission component, which is mounted on the galvanometer assembly, enables the laser beam and illumination light to irradiate the workpiece.

[0009] By adopting the above technical solution, the illumination source is reflected to the galvanometer assembly through the dichroic mirror assembly, and the laser beam is transmitted to the galvanometer assembly through the dichroic mirror assembly. The laser beam and the illumination light are coaxial. After being reflected by the mirror in the galvanometer assembly, the light is transmitted from the light transmission assembly to the workpiece. The reflected light from the workpiece passes through the light transmission assembly, the galvanometer assembly, and the dichroic mirror assembly, and is finally imaged by the online observation assembly. The focal point of the laser beam on the workpiece can be observed in real time. If a deviation occurs or the ablation radius exceeds the threshold, timely adjustments can be made, thereby improving the processing accuracy and processing quality of the laser processing machine tool.

[0010] In one embodiment, the online observation component includes a zoom lens and a CCD camera from bottom to top. The zoom lens is equipped with a zoom knob, a magnification knob, and a light transmission adjustment knob. The zoom lens is detachably connected to the dichroic mirror component.

[0011] By adopting the above technical solution, the imaging can be made clearer, and the processing focus point of the laser beam on the workpiece and the shape of the workpiece during laser processing can be displayed in the computer software.

[0012] In one embodiment, a combined cubic frame is provided between the zoom lens and the dichroic mirror assembly. An illumination source is provided on the side of the combined cubic frame, and a beam splitter is provided inside the combined cubic frame to reflect the illumination light into the dichroic mirror assembly.

[0013] By adopting the above technical solution, it is easy to provide a good lighting source, so that the lighting light is coaxial with the laser beam when it shines on the workpiece; at the same time, this design will not affect the imaging of the returned light.

[0014] In one embodiment, a coaxial mirror frame is provided between the combined cubic frame and the dichroic mirror assembly. A filter is provided inside the coaxial mirror frame. The coaxial mirror frame is mounted on top of the dichroic mirror assembly via a coaxial bracket, so that the illumination light passing through the coaxial mirror frame is perpendicular to the illumination light reflected by the dichroic mirror assembly.

[0015] By adopting the above technical solution, unwanted spectral components in the illumination light are filtered out, allowing only light of specific wavelengths to pass through, thereby improving the imaging effect.

[0016] In one embodiment, the dichroic mirror assembly includes a frame housing, a frame cover plate, a 45° frame, and a dichroic mirror. The frame cover plate is located on the top of the frame housing and is detachably connected to the bottom of the online observation assembly. The 45° frame is fixed inside the frame housing by a fastener, and the dichroic mirror is mounted on the 45° frame. A galvanometer assembly is mounted on one side of the frame housing via a first connecting plate, and the side of the frame housing away from the galvanometer is connected to the machine tool laser beam outlet via a second connecting plate. Holes are provided on the frame housing, the first connecting plate, and the second connecting plate to allow the laser beam and illumination light to enter the galvanometer assembly.

[0017] By adopting the above technical solution, the illumination light can be reflected to the galvanometer assembly through the dichroic mirror, and the laser beam can be transmitted to the galvanometer assembly through the dichroic mirror, while simultaneously ensuring that the illumination light and the laser beam are coaxial.

[0018] In one embodiment, the optical transmission assembly includes an adapter tube, an adapter ring, and a field lens. The adapter tube is threadedly connected to the bottom of the galvanometer assembly, and the field lens is detachably connected to the adapter tube via the adapter ring.

[0019] By adopting the above technical solution, field lenses with different focal lengths can be replaced to meet more laser processing needs, thereby improving the applicability of the coaxial online observation and blowing device.

[0020] In one embodiment, the bottom of the adapter tube is provided with an air blowing assembly via an adapter ring.

[0021] By adopting the above technical solution, the adapter ring can not only connect to the field lens, but also to the air blowing assembly to meet the air blowing requirements of the workpiece during laser processing.

[0022] In one embodiment, the air blowing assembly includes an air blowing cylinder, an air blowing nozzle, and an air pipe connector. The air blowing cylinder is disposed at the bottom of the adapter cylinder via an adapter ring, and the air blowing cylinder is sleeved around the field lens. The air blowing nozzle is disposed at the bottom of the air blowing cylinder, and the air pipe connector is disposed on the air blowing cylinder, so that the gas, laser beam, and illumination light can all reach the workpiece being processed.

[0023] By adopting the above technical solution, gas, laser beam and illumination light are emitted together from the nozzle, while avoiding the influence of external light on the laser beam and illumination light.

[0024] In one embodiment, a flow guiding assembly is provided between the air blowing cylinder and the air blowing nozzle. The flow guiding assembly includes a flow guiding plate and a flow guiding cover plate. The flow guiding cover plate is located on the top of the flow guiding plate. The air pipe connector is connected to the flow guiding groove opened on the flow guiding plate. Light-transmitting holes are opened at the center of both the flow guiding plate and the flow guiding cover plate to allow the laser beam and the illumination light to pass through the flow guiding plate and the flow guiding cover plate. The laser beam, the illumination light and the blowing direction are coaxial.

[0025] By adopting the above technical solution, the laser beam, illumination light and air blowing direction are made coaxial, which improves the timeliness of the air blowing component in removing the debris generated after laser ablation, thereby increasing the efficiency of further downward laser ablation and thus improving the processing efficiency of laser processing machine tools.

[0026] In one embodiment, the mouthpiece has a conical chamber inside, and the inner wall of the conical chamber is parallel to the flow direction of the guide groove.

[0027] By adopting the above technical solution, the effect of the air blowing component in discharging debris is further enhanced.

[0028] In summary, the present invention has at least one of the following beneficial technical effects:

[0029] 1. The illumination source is reflected by the dichroic mirror assembly to the galvanometer assembly, and the laser beam is transmitted through the dichroic mirror assembly to the galvanometer assembly. The laser beam and the illumination light are coaxial. After being reflected by the mirror in the galvanometer assembly, the laser beam is transmitted from the light transmission assembly to the workpiece. The reflected light from the workpiece passes through the light transmission assembly, the galvanometer assembly, and the dichroic mirror assembly, and is finally imaged by the online observation assembly. The focal point of the laser beam on the workpiece can be observed in real time. If a deviation occurs or the ablation radius exceeds the threshold, timely adjustments can be made, thereby improving the processing accuracy and processing quality of the laser processing machine tool.

[0030] 2. While observing the processing focus point of the laser beam on the workpiece in real time, the dynamic changes of the workpiece processing can be observed in real time through the online observation component, and the corresponding processing parameters can be changed to improve the processing quality of the laser processing machine tool.

[0031] 3. By designing the air blowing assembly, the laser beam, illumination beam, and air blowing direction are made coaxial, improving the timeliness of the air blowing assembly in removing debris generated after laser ablation, thereby increasing the efficiency of further downward laser ablation and thus improving the processing efficiency of laser processing machine tools. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the coaxial online observation and air blowing device applicable to laser processing machine tools according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 The front view;

[0034] Figure 3 for Figure 2 Partial perspective view;

[0035] Figure 4 This is a schematic diagram of the structure of the guide plate in an embodiment of the present invention.

[0036] In the diagram: 1-Online observation component, 101-CCD camera, 102-Zoom lens, 2-Diachromatic mirror component, 201-Frame cover plate, 202-Frame housing, 203-First connecting plate, 204-Second connecting plate, 205-45° frame, 206-Diachromatic mirror, 207-Fixing component, 3-Galvanometer component, 4-Light transmission component, 5-Illumination source, 6-Combined cubic frame, 7-Coaxial frame, 8-Air blower, 9-Air nozzle, 10-Air pipe connector, 11-Guide cover plate, 12-Guide plate, 13-Conical chamber, 14-Guide groove, 15-Guide hole, 16-Light transmission hole. Detailed Implementation

[0037] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] The coaxial online observation and air blowing device suitable for laser processing machine tools in this embodiment of the invention is described in [reference needed]. Figure 1 , 2 As shown, the coaxial online observation and air blowing device suitable for laser processing machine tools includes an online observation component 1, on which an illumination source 5 is provided to realize real-time observation of the laser beam focusing point; a dichroic mirror component 2 is provided at the bottom of the online observation component 1, and a galvanometer component 3 is provided on the side of the dichroic mirror component 2. The side of the dichroic mirror component 2 away from the galvanometer component 3 is used to connect to the laser beam outlet of the machine tool. The illumination light is reflected to the galvanometer component 3 by the dichroic mirror 206 in the dichroic mirror component 2, and the laser beam is transmitted to the galvanometer component 3 by the dichroic mirror 206 in the dichroic mirror component 2, so as to realize that the laser beam and the illumination light are coaxially incident into the galvanometer component 3; a light transmission component 4 is provided on the galvanometer component 3. The laser beam and the illumination light are incident into the light transmission component 4 through the reflector in the galvanometer component 3, and are incident onto the workpiece from the light transmission component 4.

[0039] Therefore, the present invention sets the online observation component 1 on top of the dichroic mirror component 2. The illumination light (limiting the wavelength of the light) emitted by the illumination source 5 is reflected by the dichroic mirror 206 in the dichroic mirror component 2 to the galvanometer component 3. The machine tool laser beam outlet is set on the side of the dichroic mirror component 2. The laser beam (limiting the wavelength of the light) is transmitted through the dichroic mirror 206 in the dichroic mirror component 2 to the galvanometer component 3. The laser beam and the illumination light are coaxial. After being reflected by the reflector in the galvanometer component 3, they are emitted from the light transmission component 4 to the workpiece. The reflected light from the workpiece then passes through the path from the illumination light, i.e., the emission component, the galvanometer component 3, and the dichroic mirror component 2, and finally forms an image on the online observation component 1. The processing focus point of the laser beam on the workpiece can be observed in real time. If a deviation occurs or the ablation radius (related to the laser beam power, workpiece material, etc.) exceeds the threshold, timely adjustment can be made to avoid processing the workpiece with a laser beam under deviation conditions, thereby improving the processing accuracy and processing quality of the laser processing machine tool.

[0040] Preferably, a specific structure for the online observation component 1 is provided:

[0041] The online observation component 1 includes, from bottom to top, a zoom lens 102 and a CCD camera 101. The zoom lens 102 is equipped with a zoom knob, a magnification knob and a light transmission adjustment knob. The zoom lens 102 is detachably connected to the dichroic mirror component 2.

[0042] Specifically, the reflected light from the workpiece passes through the light transmission component 4, the galvanometer component 3, and the dichroic mirror component 2, and enters the zoom lens 102. By adjusting the zoom knob, magnification knob, and light transmission adjustment knob of the zoom lens 102, the reflected light can be collected by the CCD camera 101. The CCD camera 101 presents the collected signal in the form of an image on the software on the computer, thereby allowing real-time observation of the laser beam's focal point on the workpiece and the workpiece's morphology during laser processing.

[0043] Furthermore, a combined cubic frame 6 is provided between the zoom lens 102 and the dichroic mirror assembly 2. An illumination source 5 is provided on the side of the combined cubic frame 6, and a beam splitter is provided inside the combined cubic frame 6 to reflect the illumination light into the dichroic mirror assembly 2.

[0044] Specifically, the illumination light emitted by the illumination source 5 enters the interior of the combined cube frame 6. By adjusting the tilt angle of the beam splitter inside the combined cube frame 6, the illumination light of the preset wavelength is reflected downwards and enters the interior of the dichroic mirror assembly 2. Therefore, it is convenient to control the wavelength of the illumination light and the angle at which it enters the dichroic mirror assembly 2 so that the illumination light is coaxial with the laser beam. At the same time, the setting of the illumination source 5 will not block the reflection light of the processed workpiece from being imaged on the online observation assembly 1. The reflected light will be transmitted to the online observation assembly 1 through the beam splitter.

[0045] Furthermore, a coaxial mirror frame 7 is provided between the combined cubic frame 6 and the dichroic mirror assembly 2. A filter is provided inside the coaxial mirror frame 7. The coaxial mirror frame 7 is set on the top of the dichroic mirror assembly 2 through a coaxial bracket so that the illumination light passing through the coaxial mirror frame 7 is perpendicular to the illumination light reflected by the dichroic mirror assembly 2.

[0046] Specifically, after being reflected by the beam splitter inside the combined cubic frame 6, the light is further filtered by the filter inside the coaxial frame 7, thereby controlling the wavelength of the illumination light more precisely. At the same time, the coaxial frame 7 is set on top of the dichroic mirror assembly 2 via a coaxial bracket to ensure that the illumination light is coaxial with the laser beam after being reflected by the dichroic mirror 206.

[0047] Preferably, a specific structure for a dichroic mirror assembly 2 is provided:

[0048] The dichroic mirror assembly 2 includes a mirror frame housing 202, a mirror frame cover plate 201, a 45° mirror frame 205, and a dichroic mirror 206. The mirror frame cover plate 201 is located on the top of the mirror frame housing 202 and is detachably connected to the bottom of the online observation assembly 1. The 45° mirror frame 205 is fixed inside the mirror frame housing 202 by a fastener 207, and the dichroic mirror 206 is mounted on the 45° mirror frame 205. A galvanometer assembly 3 is mounted on one side of the mirror frame housing 202 via a first connecting plate 203, and the side of the mirror frame housing 202 away from the galvanometer is connected to the machine tool laser beam outlet via a second connecting plate 204. Holes are provided on the mirror frame housing 202, the first connecting plate 203, and the second connecting plate 204 to allow the laser beam and illumination light to enter the galvanometer assembly 3.

[0049] Specifically, a lens frame cover plate 201 is installed on the top of the lens frame housing 202, and a 45° lens frame 205 is placed inside the lens frame housing 202. A dichroic mirror 206 is fixed on the 45° lens frame 205 so that the clamping angle between the dichroic mirror 206 and the bottom surface of the lens frame housing 202 is 45°, preventing external light from passing through the dichroic mirror 206 and thus affecting the normal operation of the coaxial online observation and air blowing device. The 45° lens frame 205 is fixed inside the lens frame housing 202 by a fastener 207, thereby preventing the 45° lens frame 205 from shifting due to the movement of the machine tool during laser processing, which would reduce the quality of the workpiece processing. One side of the lens frame housing 202 is secured with bolts. The assembly is fixed with a first connecting plate 203, and the lens frame housing 202 is connected to the galvanometer assembly 3 through the first connecting plate 203. The side of the lens frame housing 202 away from the galvanometer is fixed with a second connecting plate 204 through a bolt assembly, and the lens frame housing 202 is connected to the machine tool laser beam outlet through the second connecting plate 204. The laser beam emitted from the machine tool laser beam outlet enters the interior of the lens frame housing 202 through the hole on the second connecting plate 204, is transmitted through the dichroic mirror 206, and then enters the galvanometer assembly 3 through the hole on the first connecting plate 203. At the same time, the illumination light is reflected by the dichroic mirror 206 and enters the galvanometer assembly 3 through the hole on the first connecting plate 203, so as to achieve coaxiality between the illumination light and the laser beam.

[0050] Preferably, a specific structure for the optical transmission component 4 is provided:

[0051] The optical transmission assembly 4 includes an adapter tube 401, an adapter ring 402, and a field lens 403. The adapter tube 401 is threadedly connected to the bottom of the galvanometer assembly 3, and the field lens 403 is detachably connected to the adapter tube 401 via the adapter ring 402.

[0052] Specifically, an adapter tube 401 is provided at the bottom of the galvanometer assembly 3, and the adapter tube 401 is threadedly connected to the galvanometer assembly 3 for easy installation and disassembly. According to different laser processing requirements, a field lens 403 with a suitable focal length is selected and installed on the adapter tube 401 through an adapter ring 402, thereby improving the applicability of the coaxial online observation and blowing device.

[0053] Furthermore, the bottom of the adapter tube 401 is provided with an air blowing assembly via an adapter ring 402.

[0054] Specifically, the adapter ring 402 not only connects to the field lens 403, but can also connect to an air blowing assembly. The specific structure can be such that the connection point between the adapter ring 402 and the field lens 403 is a first ring, and the connection point between the adapter ring 402 and the air blowing assembly is a second ring. The first and second rings are concentric circles, but the diameter of the first ring is smaller than the diameter of the second ring, and there must be no spatial conflict between the field lens 403 and the air blowing assembly. Therefore, the adapter ring 402 not only connects to the field lens 403, but can also connect to an air blowing assembly to meet the air blowing requirements of the workpiece during laser processing.

[0055] Preferably, a specific structure for an air blowing assembly is provided:

[0056] The air blowing assembly includes an air blowing cylinder 8, an air blowing nozzle 9, and an air pipe connector 10. The air blowing cylinder 8 is set at the bottom of the adapter cylinder 401 via an adapter ring 402, and the air blowing cylinder 8 is sleeved around the field lens 403. The air blowing nozzle 9 is set at the bottom of the air blowing cylinder 8, and the air pipe connector 10 is set on the air blowing cylinder 8, so that the gas, laser beam, and illumination light can all reach the workpiece being processed.

[0057] Specifically, the top of the air blower 8 is connected to the bottom of the adapter tube 401 via an adapter ring 402, and the field lens 403 is located inside the air blower 8 to avoid spatial conflict between the field lens 403 and the air blowing assembly. An air nozzle 9 is installed at the bottom of the air blower 8, and several air pipe connectors 10 are connected to the air blower 8 to blow air into the air blower 8 and out of the air nozzle 9. At the same time, the laser beam and illumination light focused by the field lens 403 can also be emitted through the outlet of the air nozzle 9, so that the gas, laser beam and illumination light all reach the workpiece being processed, and external light is avoided from affecting the laser beam and illumination light.

[0058] Furthermore, a flow guiding assembly is provided between the air blower 8 and the air nozzle 9. The flow guiding assembly includes a flow guiding plate 12 and a flow guiding cover plate 11. The flow guiding cover plate 11 is located on the top of the flow guiding plate 12. The air pipe connector 10 is connected to the flow guiding groove 14 opened on the flow guiding plate 12. A light-transmitting hole 16 is opened at the center of both the flow guiding plate 12 and the flow guiding cover plate 11 to allow the laser beam and the illumination light to pass through the flow guiding plate 12 and the flow guiding cover plate 11. The laser beam, the illumination light and the blowing direction are coaxial.

[0059] Specifically, the flow guiding assembly is a device with a flow guiding plate 12 at the bottom and a flow guiding cover plate 11 at the top. The flow guiding plate 12 has several layers of flow guiding grooves 14. If the flow guiding grooves 14 are multi-layered, flow guiding holes 15 are opened between adjacent layers. The outermost flow guiding groove 14 is connected to the air pipe connector 10 so that the gas can directly enter the flow guiding groove 14. The gas blown into the flow guiding groove 14 flows along the trajectory of the flow guiding groove 14 and blows downward along the inner wall of the flow guiding groove 14 (the top of the flow guiding groove 14 is sealed by the flow guiding cover plate 11). The center of the flow guiding plate 12 and the flow guiding cover plate 11 are both provided with light-transmitting holes 16. The light-transmitting holes 16 and the flow guiding grooves 14 cannot be connected to prevent the blown air from being blown out of the light-transmitting holes 16. This makes the laser beam, the illumination light and the blowing direction coaxial, improves the timeliness of the blown air assembly in removing the debris generated after laser ablation, and thus improves the efficiency of the laser further ablation downward, thereby improving the processing efficiency of the laser processing machine tool.

[0060] Furthermore, the inside of the air nozzle 9 is provided with a conical chamber 13, and the inner wall of the conical chamber 13 is parallel to the flow direction of the guide groove 14.

[0061] Specifically, the gas guided by the guide groove 14 is blown into the air nozzle 9. To further enhance the effect of the air blowing assembly in expelling debris, a conical chamber 13 is provided inside the air nozzle 9. The conical chamber 13 has a structure that is wider at the top and narrower at the bottom. At the same time, the inner wall of the conical chamber 13 is parallel to the guiding direction of the guide groove 14, which reduces wind resistance and makes the gas blown out from the air outlet of the air nozzle 9 more concentrated.

[0062] The workflow of the coaxial online observation and air blowing device for laser processing machine tools in this embodiment of the invention is shown in the figure, and specifically includes:

[0063] The coaxial online observation and air blowing device is installed at the beam output port of a laser processing machine tool. The laser source is turned on, and the emitted 1064nm laser light enters the lens frame housing 202 through the hole on the second connecting plate 204. It passes through the dichroic mirror 206 (cutoff wavelength 980nm) installed on the 45° lens frame 205, enters the galvanometer assembly 3 through the hole on the first connecting plate 203, is reflected by the two mirrors in the galvanometer assembly 3, and propagates vertically downward. It is focused by the field lens 403 with a focal length of 160mm, passes through the guide cover plate 11 and the guide plate 12, and finally irradiates the workpiece surface from the circular outlet at the lower end of the air blowing nozzle 9, ablating the workpiece in the laser focusing area.

[0064] During the laser ablation process, the external air pipe sends the airflow into the guide plate 12 through the air pipe joints 10 on both sides of the air blower 8. The airflow enters the conical chamber 13 of the air blower 9 through the guide groove 14 and guide hole 15 in the guide plate 12, and finally blows air vertically to the laser ablation area through the circular outlet at the lower end of the air blower 9.

[0065] During laser processing and air blowing, the illumination source 5 emits white illumination light, which propagates vertically downward through the beam splitter (wavelength 400-700nm) in the combined cubic frame 6. After passing through the filter (wavelength 400-740nm) inside the coaxial mirror frame 7, it is reflected by the dichroic mirror 206 in the 45° mirror frame 205, and then enters the galvanometer assembly 3 through the hole on the first connecting plate 203. It is reflected by the two mirrors in the galvanometer assembly 3 and propagates vertically downward. Then it is focused by the field lens 403 with a focal length of 160mm, passes through the guide cover plate 11 and the guide plate 12, and illuminates the workpiece surface through the circular outlet at the lower end of the air blowing nozzle 9. After being reflected by the workpiece, the illumination light returns along the same path. When it passes through the beam splitter in the combined cubic frame 6, it passes directly through the beam splitter and enters the zoom lens 102. Finally, it is captured by the CCD camera 101, and the workpiece shape and the processing focus point of the laser beam on the workpiece are displayed in the software on the computer.

[0066] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A coaxial online observation and air blowing device suitable for laser processing machine tools, characterized in that, It includes: An online observation component (1) is provided with an illumination source (5) to enable real-time observation of the laser beam focusing point; The dichroic mirror assembly (2) is located at the bottom of the online observation assembly (1), and a galvanometer assembly (3) is provided on its side. The side of the dichroic mirror assembly (2) away from the galvanometer assembly (3) is used to connect to the machine tool laser beam outlet so as to realize that the laser beam and the illumination light are coaxially incident into the galvanometer assembly (3). The optical transmission component (4) is disposed on the galvanometer component (3) to enable the laser beam and illumination light to irradiate the workpiece. The online observation component (1) includes a zoom lens (102) and a CCD camera (101) from bottom to top. The zoom lens (102) is equipped with a zoom knob, a magnification knob and a light transmission adjustment knob. The zoom lens (102) is detachably connected to the dichroic mirror component (2). A combined cubic frame (6) is provided between the zoom lens (102) and the dichroic mirror assembly (2). An illumination source (5) is provided on the side of the combined cubic frame (6), and a beam splitter is provided inside the combined cubic frame (6) to reflect the illumination light into the dichroic mirror assembly (2). A coaxial mirror frame (7) is provided between the combined cubic frame (6) and the dichroic mirror assembly (2). A filter is provided inside the coaxial mirror frame (7). The coaxial mirror frame (7) is set on the top of the dichroic mirror assembly (2) through a coaxial bracket so that the illumination light passing through the coaxial mirror frame (7) is perpendicular to the illumination light reflected by the dichroic mirror assembly (2). The optical transmission component (4) includes an adapter tube (401), an adapter ring (402), and a field lens (403). The adapter tube (401) is threadedly connected to the bottom of the galvanometer assembly (3). The field lens (403) is detachably connected to the adapter tube (401) through the adapter ring (402). The bottom of the adapter tube (401) is provided with an air blowing component through the adapter ring (402). The air blowing component includes an air blowing cylinder (8), an air blowing nozzle (9), and an air pipe connector (10). The air blowing cylinder (8) is provided at the bottom of the adapter tube (401) through the adapter ring (402), and the air blowing cylinder (8) is sleeved around the field lens (403). The air blowing nozzle (9) is provided at the bottom of the air blowing cylinder (8), and the air pipe connector (10) is provided on the air blowing cylinder (8) so that the gas, laser beam, and illumination light can all reach the workpiece.

2. The coaxial online observation and air blowing device for laser processing machine tools as described in claim 1, characterized in that: The dichroic mirror assembly (2) includes a frame housing (202), a frame cover plate (201), a 45° frame (205), and a dichroic mirror (206). The frame cover plate (201) is located on the top of the frame housing (202) and is detachably connected to the bottom of the online observation assembly (1). The 45° frame (205) is fixed inside the frame housing (202) by a fastener (207), and the dichroic mirror (206) is... The mirror is mounted on a 45° frame (205). A galvanometer assembly (3) is mounted on one side of the frame housing (202) via a first connecting plate (203). The side of the frame housing (202) away from the galvanometer assembly (3) is connected to the machine tool laser beam outlet via a second connecting plate (204). Holes are provided on the frame housing (202), the first connecting plate (203), and the second connecting plate (204) to allow the laser beam and illumination light to enter the galvanometer assembly (3).

3. The coaxial online observation and air blowing device for laser processing machine tools as described in claim 1, characterized in that: A flow guiding assembly is provided between the air blowing cylinder (8) and the air blowing nozzle (9). The flow guiding assembly includes a flow guiding plate (12) and a flow guiding cover plate (11). The flow guiding cover plate (11) is located on the top of the flow guiding plate (12). The air pipe connector (10) is connected to the flow guiding groove (14) opened on the flow guiding plate (12). A light-transmitting hole (16) is opened at the center of both the flow guiding plate (12) and the flow guiding cover plate (11) so that the laser beam and the illumination light can pass through the flow guiding plate (12) and the flow guiding cover plate (11), and the laser beam, the illumination light and the blowing direction are coaxial.

4. The coaxial online observation and air blowing device for laser processing machine tools as described in claim 3, characterized in that: The air nozzle (9) has a conical chamber (13) inside, and the inner wall of the conical chamber (13) is parallel to the flow direction of the guide groove (14).

Images