A laser processing equipment

Abstract

This utility model discloses a laser processing device, comprising: a housing with a beam transmission channel formed inside and ventilation holes on its outer wall; a focusing lens assembly and a protective lens assembly, both disposed inside the housing; a first air blowing assembly communicating with the interior of the housing for outputting a first protective gas flow into the housing; and a coaxial air blowing assembly connected to the housing and having an internal cavity communicating with the beam transmission channel. The laser beam passes through the beam transmission channel and the internal cavity, and is output from the coaxial air blowing assembly, which also outputs the protective gas flow to the workpiece. This utility model, through the first and second air blowing assemblies, outputs the first and second protective gas flows between the protective lens assembly and the coaxial air blowing assembly, preventing impurities generated during laser processing from entering the housing through the coaxial air blowing assembly and causing damage or contamination to the protective lens assembly and other structures within the housing.

Description

Technical Field

[0001] This utility model relates to the field of laser welding, specifically to a laser processing equipment. Background Technology

[0002] Existing technologies often employ various coaxial air blowing devices to output protective gas, thereby blowing away impurities in the laser processing area (such as laser cutting, laser processing, laser cleaning, etc.), such as spattered welding slag and fumes, to ensure the quality of laser processing.

[0003] For example, in the patent application No. 202411522713.4, entitled "A Laser Head Gas Path Structure for Improving Cutting Quality", protective gas is output through the first and second gas channels. However, in this technical solution, the protective gas flow can only protect the external laser cutting area. In the actual laser processing, impurities such as spattered welding slag and large particles of dust may still enter the equipment and cause damage or contamination to internal components such as the protective mirror and focusing lens group. The above-mentioned prior art solution that only outputs protective gas to the outside cannot avoid damage or contamination to the internal structure such as the protective mirror and focusing lens group. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a laser processing device that outputs a first protective airflow and a second protective airflow between the protective mirror assembly and the coaxial airflow assembly via a first airflow assembly and a second airflow assembly. This prevents impurities generated during laser processing from entering the housing through the coaxial airflow assembly and causing damage or contamination to the protective mirror assembly and other structures within the housing.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A laser processing apparatus is provided, comprising:

[0007] The housing has an internal beam transmission channel for laser beam transmission and vent holes on its outer wall.

[0008] The focusing lens assembly and the protective lens assembly are both located inside the housing and are situated on the transmission path of the laser beam.

[0009] The first air blowing assembly is connected to the interior of the housing and is used to output a first protective airflow into the interior of the housing;

[0010] In addition, a coaxial air blowing assembly is connected to the housing and has an internal cavity communicating with the beam transmission channel. The laser beam output by the laser passes through the beam transmission channel and the internal cavity and is output from the coaxial air blowing assembly to act on the workpiece. The coaxial air blowing assembly is used to output a protective airflow to the workpiece.

[0011] Preferably, the first air blowing assembly includes:

[0012] The first connector is connected to the housing;

[0013] A tapered member is disposed in the housing and connected to the inner wall of the housing, with the small end of the tapered member facing downwards;

[0014] A first flow channel is formed between the tapered member and the inner wall of the housing, respectively communicating with the interior of the first connector and the interior of the housing.

[0015] Preferably, the first protective gas flows through the first flow channel and enters the interior of the housing along the axial direction of the housing.

[0016] Preferably, the laser processing equipment further includes: a second air blowing component, which is connected to the interior of the housing, for outputting a second protective airflow into the interior of the housing, and causing the first protective airflow and the second protective airflow to converge and flow out from the vent.

[0017] Preferably, the second air blowing assembly includes:

[0018] Adapter that connects to the housing;

[0019] The second connector connects to the adapter.

[0020] The adapter has a longitudinal flow channel that communicates with the interior of the second connector and transverse flow channels at both ends that communicate with the longitudinal flow channel and the interior of the housing, respectively.

[0021] Preferably, the inner diameter of the end of the transverse flow channel that connects to the interior of the shell is smaller than the inner diameter of the end that connects to the longitudinal flow channel.

[0022] Preferably, the second protective gas flows through the longitudinal flow channel and the transverse flow channel in sequence, and enters the interior of the shell along the radial direction of the shell.

[0023] Preferably, there are two transverse flow channels, which are arranged sequentially in the height direction, and one end of each transverse flow channel is connected to the same longitudinal flow channel.

[0024] Preferably, the focusing lens group, protective lens assembly, first air blowing assembly, second air blowing assembly, and coaxial air blowing assembly are arranged sequentially from bottom to top in the height direction, and the first protective air flow and the second protective air flow are both located below the protective lens assembly.

[0025] Preferably, the laser processing equipment further includes a swing shaft assembly, which is detachably connected to the housing and used to drive the housing to rotate.

[0026] Preferably, the coaxial air blowing assembly includes:

[0027] A cylindrical component connected to the housing, with a through hole on its outer wall and an inner cavity;

[0028] A sleeve, which is fitted around the cylindrical member and has an airflow channel communicating with the through hole of the cylindrical member;

[0029] The third connector is connected to the sleeve and communicates with the airflow channel of the sleeve;

[0030] And a nozzle, which is connected to the sleeve and has a nozzle cavity; the inner cavity of the cylindrical member and the inner cavity of the nozzle constitute the internal cavity.

[0031] Preferably, the third connector is coaxially arranged with the sleeve airflow channel connected to it, and the acute angle α formed by the central axis of the third connector and the sleeve airflow channel connected to it and the horizontal plane is in the range of 55°-85°.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This invention utilizes a first air blowing assembly and a second air blowing assembly to output a first protective airflow and a second protective airflow between the protective mirror assembly and the coaxial air blowing assembly. This prevents impurities generated during laser processing from entering the housing through the coaxial air blowing assembly and causing damage or contamination to the protective mirror assembly and other structures within the housing. Simultaneously, a third protective airflow can be output through the coaxial air blowing assembly, ensuring that the third protective airflow reaches the workpiece surface and guarantees the laser processing effect.

[0034] Furthermore, this utility model enables quick replacement of other structures outside the swing shaft assembly through the detachable connection between the swing shaft assembly and the housing, without the need to replace the swing shaft assembly and the air pipes, water pipes, and wires connected to the swing shaft assembly, thereby increasing the versatility of the structure and reducing the cost of use. Attached Figure Description

[0035] Figure 1 This is an overall structural diagram of the laser processing equipment of this utility model;

[0036] Figure 2 This is a cross-sectional view of the laser processing equipment (excluding the swing shaft assembly) of this utility model;

[0037] Figure 3 This is a cross-sectional view of the second air blowing component in this utility model;

[0038] Figure 4a This is a schematic diagram of the gas flow path for the first protective gas flow, the second protective gas flow, and the third protective gas flow in this utility model;

[0039] Figure 4bThis is a schematic diagram of the acute angle α formed by the axis of the third connector and the airflow channel of the sleeve with the horizontal plane in this utility model;

[0040] Figure 5 This is a schematic diagram showing the state of different laser processing modules during quick switching in this utility model. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Example 1:

[0043] like Figure 1-2 As shown, this embodiment provides a laser processing device, which includes:

[0044] The housing 1 has a beam transmission channel 100 for laser beam transmission inside, and a vent hole 200 is provided on the outer wall surface.

[0045] The focusing lens group 2 and the protective lens assembly 3 are both disposed inside the housing 1 and are located on the transmission path of the laser beam;

[0046] The first air blowing component 4 is connected to the interior of the housing 1 and is used to output a first protective airflow S1 into the housing 1 under positive pressure.

[0047] The second air blowing component 5 is connected to the interior of the housing 1 and is used to output a second protective airflow S2 into the interior of the housing 1, so that the first protective airflow S1 and the second protective airflow S2 converge and flow out from the vent 200.

[0048] In addition, there is a coaxial air blowing assembly 6, which is connected to the housing 1 and has an internal cavity 61 that communicates with the beam transmission channel 100. The laser beam output by the laser passes through the beam transmission channel 100 and the internal cavity 61 and is output from the coaxial air blowing assembly 6 to act on the workpiece. At the same time, the coaxial air blowing assembly 6 is used to output a third protective gas flow S3 to the workpiece.

[0049] The focusing lens group 2, the protective lens assembly 3, and the coaxial air blowing assembly 6 are coaxially arranged, and the airflow outlet position of the second air blowing assembly 5 corresponds to the vent 200. Meanwhile, the focusing lens group 2, the protective lens assembly 3, the first air blowing assembly 4, the second air blowing assembly 5, and the coaxial air blowing assembly 6 are arranged sequentially from bottom to top in the height direction, with the first protective airflow S1 and the second protective airflow S2 both located below the protective lens assembly 3.

[0050] In this embodiment, the first protective gas flow S1, the second protective gas flow S2, and the third protective gas flow S3 all include inert gases such as compressed air or nitrogen.

[0051] Therefore, the laser beam output by the laser can be transmitted in the beam transmission channel 100, and after passing through the focusing component 2 and the protective lens component 3 in sequence, it is output by the coaxial air blowing component 6 to act on the workpiece for laser processing (such as laser cutting, laser processing, laser cleaning, etc.). If impurities such as spattered welding slag and large particles of dust generated during the processing enter the interior of the housing 1 through the coaxial air blowing component 6 (e.g., Figure 4a When (as shown), the first air blowing component 4 and the second air blowing component 5 below the protective mirror assembly 3 continuously output the first protective air flow S1 and the second protective air flow S2, so that the first protective air flow S1 and the second protective air flow S2 can carry away the spattered welding slag, large particles of dust and other impurities, and discharge them from the vent 200, so as to prevent the impurities from rising further to the protective mirror assembly 3 and causing damage or contamination to the protective mirror assembly 3.

[0052] At the same time, the coaxial air blowing assembly 6 outputs a third protective gas flow S3, which reaches the surface of the workpiece to prevent oxidation of the weld pool, reduce liquid metal splashing during welding, optimize weld formation, disperse plasma shielding, and reduce porosity, thereby ensuring the laser processing effect.

[0053] Furthermore, such as Figure 2 As shown, the first air blowing assembly 4 includes:

[0054] The first connector 41 is connected to the housing 1 and is also connected to the protective gas source;

[0055] A conical member 42 is disposed on the housing 1 and is connected to the inner wall of the housing 1 by a non-removable connection method such as welding or bonding or a detachable connection method. The small end of the conical member 42 faces downward, and a first flow channel 43 is formed between the conical member 42 and the inner wall of the housing 1. The first flow channel 43 is connected to the inside of the first connector 41 and the inside of the housing 1.

[0056] like Figure 4aAs shown, the first protective gas flow S1 output from the protective gas source enters the first connector 41. After flowing through the first connector 41, it enters the interior of the housing 1 through the first flow channel 43 along the axial direction of the housing 1. Preferably, there can be multiple first connectors 41 in this embodiment, which are evenly spaced along the circumferential direction of the housing 1. The first flow channel 43 can be a complete annular flow channel, and the interior of each first connector 41 is connected to the first flow channel 43. Alternatively, there can be multiple first flow channels 43, which are not connected to each other. At the same time, the interior of each first connector 41 is connected to a corresponding first flow channel 43.

[0057] like Figure 3 As shown, the second air blowing assembly 5 includes:

[0058] Adapter 51, which connects to the housing 1;

[0059] The second connector 52 connects the adapter 51 and the protective gas source;

[0060] The adapter 51 is provided with a longitudinal flow channel 511 that communicates with the interior of the second connector 52 and a transverse flow channel 512 that communicates with the longitudinal flow channel 511 and the interior of the housing 1 at both ends respectively.

[0061] The second protective gas flow S2 output from the protective gas source enters the second connector 52. After passing through the second connector 52, it passes through the longitudinal flow channel 511 and the transverse flow channel 512 in sequence, and enters the interior of the housing 1 along the radial direction of the housing 1. Preferably, the extension direction of the transverse flow channel 512 is perpendicular to the axial direction of the housing 1, and the inner diameter of the end 5121 of the transverse flow channel 512 that connects to the interior of the housing 1 is smaller than the inner diameter of the end 5122 that connects to the longitudinal flow channel 511.

[0062] Since the inner diameter of the end 5121 of the transverse flow channel 512 connected to the inside of the housing 1 is smaller than the inner diameter of the end 5122 connected to the longitudinal flow channel 511, the flow velocity of the second protective gas flow S2 increases at the end 5121 of the transverse flow channel 512 connected to the inside of the housing 1 when it is blown out, forming an "air knife". This effectively prevents impurities such as smoke and spatter from rising further. At the same time, due to the increased airflow velocity, the pressure at the end 5121 of the transverse flow channel 512 connected to the inside of the housing 1 decreases, forming a negative pressure zone. Therefore, based on Bernoulli's principle, the first protective gas flow S1 above the second protective gas flow S2 can flow further downward under the negative pressure. After merging with the second protective gas flow S2, it carries away impurities such as spattered welding slag and large particles of smoke. Under the continuous blowing of the second protective gas flow S2, it is discharged from the vent 200, so as to fully avoid damage to the internal protective mirror assembly 3 caused by spattered welding slag, large particles of smoke and other impurities.

[0063] Preferably, there are two transverse flow channels 512 in this embodiment, which are arranged sequentially in the height direction, and one end of the two transverse flow channels 512 is connected to the same longitudinal flow channel 511. Thus, the second protective airflow S2 output by the second connector 52 can flow out through the upper and lower transverse flow channels 512 to form a "double-layer air curtain" to enhance the removal effect of internal impurities.

[0064] Therefore, in this embodiment, the first air blowing assembly 4 and the second air blowing assembly 5 output a first protective airflow S1 and a second protective airflow S2 between the protective mirror assembly 3 and the coaxial air blowing assembly 6 to form a protective air curtain. This prevents impurities generated during laser processing from entering the housing 1 through the coaxial air blowing assembly 6 and causing damage or contamination to the protective mirror assembly 3 and other structures inside the housing 1. This further avoids laser processing quality defects caused by damage or contamination to the internal structures of the protective mirror assembly 3 and other structures, and ensures the quality of laser processing.

[0065] Example 2:

[0066] The only difference between this embodiment and Embodiment 1 is that, Figure 1 As shown, the laser processing equipment also includes:

[0067] The swing shaft assembly 7 is detachably connected to the housing 1 and is used to drive the housing 1 to rotate.

[0068] For example, in this embodiment, the balance shaft assembly 7 and the housing 1 can be detachably connected by screws / bolts, thus, as Figure 5 As shown, when replacing functional modules, it is only necessary to disassemble and reassemble the entire assembly consisting of housing 1, focusing lens group 2, protective lens assembly 3, first air blowing assembly 4, second air blowing assembly 5, and coaxial air blowing assembly 6 to achieve different laser processing functions. For example, if the current assembly consisting of housing 1, focusing lens group 2, protective lens assembly 3, first air blowing assembly 4, second air blowing assembly 5, and coaxial air blowing assembly 6 is a laser cutting head, and needs to be replaced, separate housing 1 of the laser cutting head from the swing shaft assembly 7, and then disassemble and reassemble the entire assembly consisting of housing 1, focusing lens group 2, protective lens assembly 3, first air blowing assembly 4, second air blowing assembly 5, and coaxial air blowing assembly 6. The housing 1 of the laser welding head, which is composed of component 6, can be connected to the swing shaft assembly 7. The parameters, specifications, and corresponding welding process parameters of the focusing lens group 2 and the protective lens assembly 3 of the laser cutting head and the laser welding head can be set differently, thereby enabling different laser processing functions. Alternatively, if one or more of the following components malfunction and need to be repaired or replaced: housing 1, focusing lens group 2, protective lens assembly 3, first air blowing assembly 4, second air blowing assembly 5, or coaxial air blowing assembly 6, the entire assembly of the above components can be disassembled, and the fault-free structure can be reinstalled through the connection between housing 1 and swing shaft assembly 7.

[0069] Therefore, this embodiment can realize quick replacement of other structures except for the swing shaft assembly, without replacing the swing shaft assembly and the air pipes, water pipes and wires connected to the swing shaft assembly.

[0070] Example 3:

[0071] The only difference between this embodiment and Embodiment 1 is that, Figure 2 As shown, the coaxial air blowing assembly 6 includes:

[0072] A cylindrical member 62 is detachably connected to the bottom of the housing 1 (e.g., by a threaded connection), and has a through hole (not shown) on its outer wall surface. The cylindrical member 62 also has a cylindrical inner cavity 621.

[0073] A sleeve 63 is sleeved around the cylindrical member 62 and has a sleeve airflow channel 631 communicating with the through hole of the cylindrical member 62; in this embodiment, the sleeve 63 and the cylindrical member 62 can be integrally formed.

[0074] The third connector 64 connects the sleeve 63 and the protective gas source, and is in communication with the airflow channel 631 of the sleeve.

[0075] And, a nozzle 65, which is connected to the bottom of the sleeve 63 and has a nozzle cavity 651; the cylindrical cavity 621 and the nozzle cavity 651 constitute the internal cavity 61;

[0076] The cylindrical component 62, sleeve 63, nozzle 65, focusing lens group 2, and protective lens assembly 3 are coaxially arranged.

[0077] like Figure 4a As shown, the third protective gas flow S3 output from the protective gas source enters the third connector 64. After flowing through the third connector 64, it enters the interior of the cylindrical component 62 through the sleeve airflow channel 631 of the sleeve 63 and the through hole of the cylindrical component 62, and is output from the nozzle 65 to the workpiece located below the coaxial blowing assembly 6. At the same time, the laser beam passes through the beam transmission channel 100 and the internal cavity 61 in sequence, and is output from the nozzle 65.

[0078] Preferably, there can be multiple sleeve airflow channels 631 and third connectors 64, and they are all evenly spaced along the circumferential direction. At the same time, each third connector 64 is connected to a corresponding sleeve airflow channel 631.

[0079] At the same time, such as Figure 4b As shown, the third connector 64 is coaxially arranged with the sleeve airflow channel 631 connected to it, and the acute angle α formed by the central axis Y of the third connector 64 and the sleeve airflow channel 631 connected to it and the horizontal plane is in the range of 55°-85°. This ensures that the third protective gas flow S3 can be sprayed downward onto the workpiece through the nozzle 65.

[0080] In summary, this invention can output a first protective airflow and a second protective airflow between the protective mirror assembly and the coaxial airflow assembly through the first and second airflow components to form a protective air curtain. This prevents impurities generated during laser processing from entering the housing through the coaxial airflow component and causing damage or contamination to the protective mirror assembly and other structures within the housing. Simultaneously, a third protective airflow can be output through the coaxial airflow component, ensuring that the third protective airflow reaches the workpiece surface and guarantees the laser processing effect.

[0081] Furthermore, this utility model enables quick replacement of other structures outside the swing shaft assembly through the detachable connection between the swing shaft assembly and the housing, without the need to replace the swing shaft assembly and the air pipes, water pipes, and wires connected to the swing shaft assembly, thereby increasing the versatility of the structure and reducing the cost of use.

[0082] It should be noted that the technical features in embodiments 1 to 3 above can be combined arbitrarily, and the resulting technical solutions all fall within the protection scope of this application. Furthermore, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser processing device, characterized in that, include: The housing has an internal beam transmission channel for laser beam transmission and vent holes on its outer wall. The focusing lens assembly and the protective lens assembly are both located inside the housing and are situated on the transmission path of the laser beam. The first air blowing assembly is connected to the interior of the housing and is used to output a first protective airflow into the interior of the housing; In addition, a coaxial air blowing assembly is connected to the housing and has an internal cavity communicating with the beam transmission channel. The laser beam output by the laser passes through the beam transmission channel and the internal cavity and is output from the coaxial air blowing assembly to act on the workpiece. The coaxial air blowing assembly is used to output a protective airflow to the workpiece.

2. The laser processing equipment as described in claim 1, characterized in that, The first air blowing assembly includes: The first connector is connected to the housing; A tapered member is disposed in the housing and connected to the inner wall of the housing, with the small end of the tapered member facing downwards; A first flow channel is formed between the tapered member and the inner wall of the housing, respectively communicating with the interior of the first connector and the interior of the housing.

3. The laser processing equipment as described in claim 1, characterized in that, The first protective gas flows through the first flow channel and enters the interior of the shell along the axial direction of the shell.

4. The laser processing equipment as described in claim 1, characterized in that, The laser processing equipment further includes a second air blowing component, which is connected to the interior of the housing and is used to output a second protective airflow into the housing, such that the first protective airflow and the second protective airflow converge and flow out from the vent.

5. The laser processing equipment as described in claim 4, characterized in that, The second air blowing assembly includes: Adapter that connects to the housing; The second connector connects to the adapter. The adapter has a longitudinal flow channel that communicates with the interior of the second connector and transverse flow channels at both ends that communicate with the longitudinal flow channel and the interior of the housing, respectively.

6. The laser processing equipment as described in claim 5, characterized in that, The inner diameter of the end of the transverse flow channel that connects to the inside of the shell is smaller than the inner diameter of the end that connects to the longitudinal flow channel.

7. The laser processing equipment as described in claim 5, characterized in that, The second protective gas flows sequentially through the longitudinal flow channel and the transverse flow channel, entering the interior of the shell along the radial direction of the shell.

8. The laser processing equipment as described in claim 5, characterized in that, There are two transverse flow channels, which are arranged sequentially in the height direction, and one end of each transverse flow channel is connected to the same longitudinal flow channel.

9. The laser processing equipment as described in claim 4, characterized in that, The focusing lens group, protective lens assembly, first air blowing assembly, second air blowing assembly, and coaxial air blowing assembly are arranged sequentially from bottom to top in the height direction, with the first protective air flow and the second protective air flow both located below the protective lens assembly.

10. The laser processing equipment as described in claim 1, characterized in that, The laser processing equipment also includes a swing shaft assembly, which is detachably connected to the housing and used to drive the housing to rotate.

11. The laser processing equipment as described in claim 1, characterized in that, The coaxial air blowing assembly includes: A cylindrical component connected to the housing, with a through hole on its outer wall and an inner cavity; A sleeve, which is fitted around the cylindrical member and has an airflow channel communicating with the through hole of the cylindrical member; The third connector is connected to the sleeve and communicates with the airflow channel of the sleeve; And a nozzle, which is connected to the sleeve and has a nozzle cavity; the inner cavity of the cylindrical member and the inner cavity of the nozzle constitute the internal cavity.

12. The laser processing equipment as described in claim 11, characterized in that, The third connector is coaxially arranged with the sleeve airflow channel connected to it, and the acute angle α formed by the central axis of the third connector and the sleeve airflow channel connected to it and the horizontal plane ranges from 55° to 85°.

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