Breathable dustproof laser cutting head and laser cutting machine

Abstract

The utility model provides a breathable dustproof laser cutting head and a laser cutting machine, and relates to the technical field of laser cutting, the laser cutting head comprises a driving assembly, a follow-up assembly and a focusing assembly, the follow-up assembly comprises a flange, and the flange is connected with the driving assembly; the focusing assembly is connected with the follow-up assembly; a through hole is formed in a light guide cylinder shell of the follow-up assembly, a light path channel in the follow-up assembly is communicated with the outside through the through hole, the through hole is provided with a waterproof ventilation valve, the waterproof ventilation valve can prevent dust and liquid from entering the light path channel, and the light path channel can be prevented from being polluted by the outside through the structural design of the waterproof ventilation valve; and the gas pressure between the light path channel and the outside can be balanced, and the burden of the sealing structure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a breathable and dustproof laser cutting head and a laser cutting machine. Background Art

[0002] Laser cutting is a new type of thermal cutting technology. It uses a high-power density laser beam to irradiate the material to be cut, so that the material is quickly heated to the vaporization temperature and evaporates to form holes. As the beam moves on the material, the holes continuously form a very narrow slit to complete the cutting of the material. Laser cutting has the advantages of fast cutting speed and high production efficiency.

[0003] At present, the relevant laser cutting heads adopt the form of constant air blowing. Regardless of whether the laser cutting head is used or not, a separate branch needs to be introduced to blow air to the optical path to ensure that the air pressure inside the optical path is always higher than the external air pressure, so as to avoid external dust from entering the optical path and polluting the optical path. This method has a complex structure and also increases the maintenance cost of the equipment. Utility Model Content

[0004] The utility model provides a breathable and dustproof laser cutting head and a laser cutting machine, which solve the problem of how to prevent the light path from being polluted, and can simplify the structure and reduce the maintenance cost at the same time.

[0005] An embodiment of the utility model provides a breathable and dustproof laser cutting head, which includes a driving assembly; a follower assembly, including a flange, and the flange is connected to the driving assembly; a focusing assembly, which is connected to the follower assembly; wherein a through hole is provided on the light guide tube shell of the follower assembly, and the through hole connects the optical path channel in the follower assembly with the outside world, and the through hole is provided with a waterproof breathable valve, and the waterproof breathable valve can prevent dust and liquid from entering the optical path channel.

[0006] Furthermore, the through hole is a threaded hole, the waterproof breathable valve is fixed on the threaded hole by a threaded connection, and the waterproof breathable valve can balance pressure in both directions.

[0007] Furthermore, the extension direction of the through hole is perpendicular to the extension direction of the optical path channel in the follower assembly, and the waterproof breathable valve avoids the laser propagation route in the optical path channel.

[0008] Furthermore, the focusing assembly comprises a laser nozzle, and the laser nozzle is located at the end of the focusing assembly, and the opening direction of the through hole is the same as the opening direction of the laser nozzle.

[0009] Furthermore, the follower assembly also has a protective cover, which is directly opposite to the opening of the through hole, and both ends of the protective cover are fixedly connected to the light guide tube housing.

[0010] Furthermore, the driving assembly includes a roller and a gear ring that cooperate with each other, the gear ring is connected to the flange, and the roller rotates to drive the gear ring and the flange to rotate.

[0011] Furthermore, the laser cutting head includes a collimation assembly, and the drive assembly includes a first drive assembly and a second drive assembly, the first drive assembly is connected to the collimation assembly, and the second drive assembly is respectively connected to the first drive assembly and the follower assembly; the first drive assembly can drive the second drive assembly to rotate, and the second drive assembly can drive the follower assembly to rotate.

[0012] The utility model embodiment also provides a laser cutting machine, which includes: the above-mentioned laser cutting head; a cantilever beam, the laser cutting head is installed on the cantilever beam frame; a frame, one end of the cantilever beam is connected to the frame.

[0013] Furthermore, the cantilever beam has a receiving cavity, and a reinforcing component is arranged in the receiving cavity, and the reinforcing component is used to improve the structural strength of the cantilever beam.

[0014] Furthermore, the reinforcement components are all provided with weight-reducing holes.

[0015] The utility model provides a breathable dustproof laser cutting head and a laser cutting machine. The laser cutting head comprises a driving assembly, a follower assembly and a focusing assembly. The follower assembly comprises a flange, and the flange is connected to the driving assembly. The focusing assembly is connected to the follower assembly. The rotation of the driving assembly can drive the follower assembly and the focusing assembly to rotate, so that the laser emitted by the focusing assembly can be used for cutting. Considering that the follower of the laser cutting head will cause a change in the volume of an optical path during operation, thereby generating a pressure difference, when the pressure of the optical path is negative, dust and related impurities from the outside enter the optical path under the action of the pressure difference, thereby polluting the optical path. A through hole is provided on a light guide tube shell of the follower assembly, the optical path in the follower assembly is connected with the outside through the through hole, and a waterproof breathable valve is provided in the through hole. The waterproof breathable valve can prevent dust and liquid from entering the optical path. When a pressure difference is generated, gas can pass through the waterproof breathable valve to balance the pressure difference, reduce the burden of the sealing structure, and prevent the optical path from being polluted by the outside. At the same time, the waterproof breathable valve has a simple design, optimizes the overall structure, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of a laser cutting head provided in an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the enlarged local structure of part A;

[0018] Figure 3 A schematic diagram of the structure of a laser cutting head provided in an embodiment of the utility model;

[0019] Figure 4 A cross-sectional view of another laser cutting head provided in an embodiment of the utility model;

[0020] Figure 5 A schematic diagram of the structure of a laser cutting machine provided in an embodiment of the utility model;

[0021] Figure 6 A schematic structural diagram of the laser cutting machine from another perspective provided in an embodiment of the utility model.

[0022] Description of Reference Numerals

[0023] 10. Laser cutting machine; 100. Laser cutting head; 110. Collimation assembly; 111. Laser generator; 112. Collimation assembly light guide tube; 120. Drive assembly; 120A. First drive assembly; 120B. Second drive assembly; 121. Roller; 122. Gear ring; 123. Servo motor; 124. Reducer; 130. Follow-up assembly; 131. Flange; 132. Light guide tube housing; 1321. Through hole; 133. Optical path channel; 134. Waterproof breathable valve; 135. Protective cover; 140. Focusing assembly; 141. Focusing device; 142. Sleeve; 143. Laser nozzle; 144. Anti-collision device; 145. Protective mirror device; 200. Cantilever beam; 210. Accommodating cavity; 220. Strengthening component; 300. Frame. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the utility model will not be described separately.

[0026] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the corresponding schematic diagrams, which may or may not be the left and right directions in normal use.

[0027] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. The term "connected" includes both direct and indirect connections unless otherwise specified.

[0028] In a specific embodiment, the laser cutting head provided by the present application is applicable to any type of laser cutting machine. For example, the laser cutting head is applicable to a laser melting cutting type laser cutting machine; for example, the laser cutting head is applicable to a laser oxidation cutting type laser cutting machine; for example, the laser cutting head is applicable to a laser gasification cutting type laser cutting machine; the laser cutting head is also applicable to high-power laser cutting; the laser cutting head is also applicable to a three-dimensional five-axis laser cutting machine. For ease of explanation, the structure of the laser cutting head is exemplarily described by taking the laser cutting head applicable to a laser melting cutting type laser cutting machine as an example.

[0029] At present, the relevant laser cutting head adopts a constant air blowing method to ensure that the air pressure inside the optical path is always higher than the external air pressure, thereby preventing dust from entering the optical path. This structure requires a separate air blowing branch to be installed, which increases the complexity of the structure and the maintenance cost of the equipment. In response to this problem, the present application provides a laser cutting head to solve the above problem.

[0030] In some embodiments, Figures 1 to 3As shown, the laser cutting head 100 includes a collimation assembly 110, a driving assembly 120, a follower assembly 130 and a focusing assembly 140, the collimation assembly 110 includes a collimation assembly light guide tube 112, and the collimation assembly light guide tube 112 is used to conduct laser; the driving assembly 120 is connected to the collimation assembly 110, the follower assembly 130 includes a flange 131, and the flange 131 is connected to the driving assembly 120; the focusing assembly 140 is connected to the follower assembly 130; wherein, a through hole 1321 is provided on the light guide tube housing 132 of the follower assembly 130, and the through hole 1321 connects the optical path channel 133 in the follower assembly 130 with the outside world, and the through hole 1321 is provided with a waterproof breathable valve 134, and the waterproof breathable valve 134 can prevent dust and liquid from entering the optical path channel 133.

[0031] Specifically, the collimation assembly 110 uses the laser beam as a directionally emitted light beam to form a light beam in space as a collimation reference line, and includes a laser generator 111 and a collimation assembly light guide tube 112. The laser generator 111 is used to access the optical fiber, and the collimation assembly light guide tube 112 is used to conduct laser.

[0032] One end of the driving assembly 120 is connected to the collimating assembly 110 , and the other end is connected to the follower assembly 130 . The driving assembly 120 drives the follower assembly 130 and the focusing assembly 140 to rotate, so that the focusing assembly 140 emits laser for cutting.

[0033] The specific transmission form of the drive assembly 120 is not limited. For example, the drive assembly 120 can be transmitted by means of gears. For example, the drive assembly 120 can also be transmitted by means of a roller and a gear ring. A specific embodiment will be given later, which will not be repeated here. It should be noted that the drive assembly 120 may include one set of transmission structures, or two sets of transmission structures. For ease of understanding, a coordinate system is established for auxiliary explanation. The extension direction of the collimation assembly light guide tube 112 is defined as the vertical direction of the Z axis, and the X axis and the Y axis are perpendicular to the Z axis. The X axis and the Y axis form a horizontal plane. For example, when the drive assembly 120 includes only one set of transmission structures, the laser emitted by the focusing assembly 140 can only be cut on the XY plane. For example, when the drive assembly 120 includes two sets of transmission structures, cutting at any position in the XYZ three-dimensional space is achieved. The specific arrangement structure will be given later, and no further description will be given here.

[0034] During the laser cutting process, the follower assembly 130 allows the laser nozzle 143 to maintain a preset distance from the cutting surface, thereby efficiently completing the cutting of porous workpieces and various uneven curved surfaces.

[0035] The focusing assembly 140 includes a focusing device 141, a sleeve 142 and a laser nozzle 143. The laser is emitted through the laser nozzle 143 for cutting. In order to protect the laser nozzle 143, the focusing assembly 140 can also be provided with an anti-collision device 144 and a protective mirror device 145.

[0036] In order to prevent the laser cutting head from causing the volume change of the gas space in the optical path channel 133 during operation, thereby generating a pressure difference, a through hole 1321 is provided on the light guide tube housing 132 of the follower assembly 130, and the optical path channel 133 is connected to the outside through the through hole 1321. When the volume of the optical path channel 133 changes, the internal and external air pressures are balanced through the through hole 1321. At the same time, considering that dust and other related impurities may enter the optical path channel 133 and pollute the optical path, the through hole 1321 is provided with a waterproof breathable valve 134, which can balance the pressure in both directions. Figure 2 As shown by the arrow in the middle, the gas can flow from the optical path 133 through the waterproof breathable valve 134 to the outside, and can also flow from the outside to the optical path 133 through the waterproof breathable valve 134. The waterproof breathable valve 134 can also prevent dirt and liquid from entering the optical path 133. The dirt includes impurities such as dust and debris. The waterproof level of the waterproof breathable valve 134 is not limited. For example, the waterproof level of the waterproof breathable valve 134 is IP68. After the air pressure is balanced, condensation can be reduced and water mist can be eliminated. The waterproof breathable valve 134 also has a certain chemical corrosion resistance.

[0037] In some embodiments, the through hole 1321 can be set as a threaded hole, the waterproof breathable valve 134 has a bolt head, and the waterproof breathable valve 134 is fixed by connecting the bolt head and the threaded hole through threads. A sealing ring can also be added to improve the sealing performance.

[0038] The utility model provides a breathable dustproof laser cutting head and a laser cutting machine. The laser cutting head comprises a driving assembly, a follower assembly and a focusing assembly. The follower assembly comprises a flange, and the flange is connected to the driving assembly. The focusing assembly is connected to the follower assembly. The rotation of the driving assembly can drive the follower assembly and the focusing assembly to rotate, so that the laser emitted by the focusing assembly can be used for cutting. Considering that the follower of the laser cutting head will cause a change in the volume of an optical path during operation, thereby generating a pressure difference, when the pressure of the optical path is negative, dust and related impurities from the outside enter the optical path under the action of the pressure difference, thereby polluting the optical path. A through hole is provided on a light guide tube shell of the follower assembly, the optical path in the follower assembly is connected with the outside through the through hole, and a waterproof breathable valve is provided in the through hole. The waterproof breathable valve can prevent dust and liquid from entering the optical path. When a pressure difference is generated, gas can pass through the waterproof breathable valve to balance the pressure difference, reduce the burden of the sealing structure, and prevent the optical path from being polluted by the outside. At the same time, the waterproof breathable valve has a simple design, optimizes the overall structure, and reduces maintenance costs.

[0039] In some embodiments, Figure 2 As shown, in order to prevent the waterproof breathable valve 134 from affecting the propagation of the laser in the optical path channel 133, the extension direction of the through hole 1321 is perpendicular to the extension direction of the optical path channel 133 in the follower assembly 130. It can be simply understood that the laser light propagates in the horizontal direction in the optical path channel 133 in the follower assembly 130, and a hole 1321 is formed on the light guide tube shell 132 in the vertical direction.

[0040] In some embodiments, Figure 2 As shown, the focusing assembly 140 includes a laser nozzle 143, and the laser nozzle 143 is located at the end of the focusing assembly 140. The opening direction of the through hole 1321 is the same as the opening direction of the laser nozzle 143. Specifically, considering that dust moves downward under the action of gravity and then adsorbs on the surface of each object, in order to prevent dust from falling into the through hole 1321 area and blocking the waterproof breathable valve 134 as much as possible, the through hole 1321 should be opened downward. Since the follower assembly 130 may rotate, the swing of the follower assembly 130 during the operation of the laser cutting head 100 causes the direction of the through hole 1321 to be not fixed. Considering that the laser nozzle 143 is mostly cut downward in the vertical direction, the opening direction of the through hole 1321 is the same as the opening direction of the laser nozzle 143, so as to ensure that in most cases, the opening of the through hole 1321 faces downward.

[0041] In some embodiments, Figure 4As shown, in order to prevent dust from falling into the through hole 1321 area and clogging the waterproof breathable valve 134 as much as possible, the follower assembly 130 also has a protective cover 135, and the protective cover 135 is opposite to the opening of the through hole 1321. The opposite here can be understood as the protective cover 135 being arranged in the extension direction of the through hole 1321. Considering that when the air pressure in the optical path channel 133 becomes smaller, the external gas needs to enter the optical path channel 133 through the waterproof breathable valve 134 to balance the air pressure, and the flow of gas will inevitably drive the flow of dust. The existence of the protective cover 135 will change the flow path of the gas. When the gas passes through the protective cover 135, the dust carried by the gas will be adsorbed on the protective cover 135. The protective cover 135 will absorb as much dust as possible, thereby reducing the dust from falling into and clogging the waterproof breathable valve 134, thereby extending the service life of the waterproof breathable valve 134. In order to facilitate the fixation of the protective cover 135, the two ends of the protective cover 135 are fixedly connected to the light guide tube housing 132.

[0042] In some embodiments, Figure 1 As shown, the driving assembly 120 includes a roller 121 and a gear ring 122 that cooperate with each other, the gear ring 122 is connected to the flange 131, and the roller 121 rotates to drive the gear ring 122 and the flange 131 to rotate. Specifically, the roller 121 has a roller body and a roller column, the roller column is evenly arranged on the roller body along the circumferential direction, and the edge of the gear ring 122 has a meshing portion that cooperates with the roller column. The motor is connected to the roller 121, and the motor drives the roller 121 to rotate. The ring gear 122 is mounted on the sleeve of the optical path transmission, and the ring gear 122 is connected to the parts that need to be rotated. For example, the follower assembly 130 and the focusing assembly 140 need to rotate, and the ring gear 122 is connected to the flange 131 of the follower assembly 130. The roller 121 rotates under the action of the motor, thereby driving the ring gear 122 to rotate. The rotation of the ring gear 122 drives the flange 131 to rotate. The zero backlash transmission of the roller and ring gear is utilized to improve the transmission accuracy of the drive assembly 120. At the same time, the roller 121 and the ring gear 122 are matched, and the transmission accuracy is high. The drive assembly 120 can use a servo motor 123 and a reducer 124, and the servo motor 123 is connected to the roller 121 through the reducer 124. Compared with the traditional method of only using a DD motor (direct drive motor), the use of a servo motor 123 can reduce the weight of the drive assembly 120, improve the accuracy of the entire laser cutting head 100, and improve the stability of the laser cutting machine 10. At the same time, the laser cutting head 100 using the servo motor 123 is smaller in size, making the laser cutting head 100 more suitable for cutting complex parts.

[0043] In some embodiments, Figure 1As shown, when the drive assembly 120 includes two sets of transmission structures, it can be specifically understood that the drive assembly 120 includes a first drive assembly 120A and a second drive assembly 120B. The first drive assembly 120A can be understood as what is called a C-axis drive assembly in the art, and the second drive assembly 120B can be understood as what is called an A-axis drive assembly in the art. One end of the first drive assembly 120A is connected to the collimation assembly 110, and the other end of the first drive assembly 120A is connected to the second drive assembly 120B. The first drive assembly 120A can drive the second drive assembly 120B, the follower assembly 130 and the focusing assembly 1 40 rotates around the Z axis to meet the requirement that the laser emitted by the focusing assembly 140 can cut on the XY plane. One end of the second driving assembly 120B is connected to the first driving assembly 120A, and the other end of the second driving assembly 120B is connected to the follower assembly 130. The second driving assembly 120B can drive the follower assembly 130 and the focusing assembly 140 to rotate around the X axis to meet the requirement that the laser emitted by the focusing assembly 140 can cut on the XZ plane. Under the joint action of the first driving assembly 120A and the second driving assembly 120B, cutting can be achieved at any position in the XYZ three dimensions.

[0044] This embodiment also provides a laser cutting machine 10, such as Figure 5 and Figure 6As shown, the laser cutting machine 10 includes a laser cutting head 100 , a cantilever beam 200 and a frame 300 . The laser cutting head 100 is mounted on the cantilever beam 200 , and one end of the cantilever beam 200 is connected to the frame 300 . Specifically, one end of the cantilever beam 200 is connected to the frame 300. The connection here includes a fixed connection, in which one end of the cantilever beam 200 is fixed to the frame 300; it also includes a movable connection, in which the cantilever beam 200 can move relative to the frame 300. The movable connection method is not limited here. Any device or structure that can cause the cantilever beam 200 and the frame 300 to move relative to each other meets the requirements of this case. For example, a slide rail is provided on the frame 300, and a slide groove is provided at one end of the cantilever beam 200. The slide groove of the cantilever beam 200 wraps the slide rail of the frame 300, and the cantilever beam 200 can slide on the frame 300. At the same time, the cooperation between the slide groove and the slide rail can effectively prevent the cantilever beam 200 from falling off the frame 300. Similarly, the frame 300 can have a slide groove, and the cantilever beam 200 can have a slide rail. One end of the cantilever beam 200 can be connected to the frame 300 by a single slide rail. Specifically, it can be understood that the cantilever beam 200 is provided with a slide groove, and the frame 300 is provided with a slide rail. The cantilever beam 200 is connected to the frame 300 through the cooperation of the single slide groove and the slide rail. In order to improve safety and reduce the bearing capacity of the single slide rail at the same time, multiple slide rails can be provided, that is, the cantilever beam 200 is provided with multiple slide grooves, and the frame 300 is provided with multiple slide rails. Through the cooperation of multiple slide grooves and multiple slide rails, the bearing capacity of the connection position between the cantilever beam 200 and the frame 300 can be effectively dispersed. In order to further improve the overall stability of the cantilever beam 200 and the frame 300, two slide rails are arranged on the frame 300. The two slide rails are parallel and not in the same vertical plane. One slide rail is close to the top of the frame 300 to provide tension to the cantilever beam 200, and the other is located near the middle of the frame 300 to provide support for the cantilever beam. The stability of the cantilever beam 200 and the frame 300 is effectively improved through the inclined-stayed structure.

[0045] The laser cutting head 100 is installed on the cantilever beam 200. A slide groove can also be set on the cantilever beam 200. The slide groove is arranged along the extension direction of the cantilever beam 200. The laser cutting head 100 can move along the slide groove of the cantilever beam 200. At the same time, the laser cutting head 100 also moves in the up and down directions by transmission methods such as ball screws or transmission gears. The up and down directions are the Z-axis directions described in this field. Through the movement of the cantilever beam 200 along the frame 300, the movement of the laser cutting head 100 along the cantilever beam 200, and the up and down movement of the laser cutting head 100 itself, the laser cutting head 100 can meet the movement in the three-dimensional direction.

[0046] In some embodiments, Figure 6As shown, the cantilever beam 200 has a housing cavity 210, and a reinforcement component 220 is arranged in the housing cavity 210. The reinforcement component 220 is used to improve the structural strength of the cantilever beam 200. Specifically, the cantilever beam 200 has a hollow housing cavity 210. The hollow here refers to the space surrounded by the cantilever beam 200, and does not only represent that the interior of the entire cantilever beam 200 is hollow. The cantilever beam 200 may have a corresponding structure inside. The specific structure of the cantilever beam 200 is not limited. The cantilever beam 200 may include only an upper plate and a bottom plate, or only an upper plate and a side plate. The cantilever beam 200 satisfies that one end can be connected to the frame 300, and the cantilever beam 200 can be used to install and fix other devices, such as installing a laser cutting head 100. For the sake of convenience, the following takes the inclined cantilever beam 200 as an example, and the cantilever beam 200 is a trapezoidal body. In order to reduce the weight of the cantilever beam 200, the cantilever beam 200 has a hollow accommodating cavity 210, and a reinforcing component 220 is arranged in the accommodating cavity 210. The reinforcing component 220 is any device or structure that can improve the structural strength of the cantilever beam 200. It should be noted that the connection between the reinforcing component 220 and the cantilever beam 200 can be any form of connection, such as riveting, welding, and fixing by bolts and nuts. For the overall structural performance, welding can be selected for connection. Exemplarily, the reinforcing component 220 can be a reinforcing plate, and the rigidity of the cantilever beam 200 is increased by arranging the reinforcing plate inside the accommodating cavity 210. The specific arrangement of the reinforcing plate is not limited here. The reinforcing plate can be a flat plate or a plate with a bend. For example, the reinforcing plate can be arranged vertically inside the accommodating cavity 210; for example, it can also be arranged horizontally inside the accommodating cavity 210; at the same time, multiple reinforcing plates can be spliced ​​into a triangle to improve the stability of the structure and arranged inside the accommodating cavity 210. The arrangement of the reinforcing plate will be described in detail later, and no further description will be made here. Exemplarily, the reinforcing component 220 may also be a bearing platform. For example, a cylinder is arranged inside the accommodating cavity 210 to increase the rigidity of the cantilever beam 200. Furthermore, the interior of the accommodating cavity 210 may be a combination of a reinforcing plate and a bearing platform. Through the combination of the reinforcing plate and the bearing platform, a cage structure is formed in the accommodating cavity 210 through the reinforcing component 220, which effectively ensures the rigidity of the cantilever beam 200 while reducing the weight of the cantilever beam 200.

[0047] In some embodiments, in order to reduce the weight of the laser cutting machine 10 , the reinforcement components 220 are provided with weight-reducing holes.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A breathable and dustproof laser cutting head, characterized in that: include: Drive assembly; A follower assembly, comprising a flange, wherein the flange is connected to the driving assembly; A focusing assembly connected to the follower assembly; Among them, a through hole is arranged on the light guide tube shell of the follower assembly, and the through hole connects the optical path channel in the follower assembly with the outside world. The through hole is provided with a waterproof breathable valve, and the waterproof breathable valve can prevent dust and liquid from entering the optical path channel.

2. The laser cutting head according to claim 1, characterized in that: The through hole is a threaded hole, the waterproof breathable valve is fixed on the threaded hole by a threaded connection, and the waterproof breathable valve can balance the pressure in both directions.

3. The laser cutting head according to claim 1, characterized in that: The extension direction of the through hole is perpendicular to the extension direction of the optical path channel in the follower assembly, and the waterproof breathable valve avoids the laser propagation route in the optical path channel.

4. The laser cutting head according to claim 3, characterized in that: The focusing assembly comprises a laser nozzle, and the laser nozzle is located at the end of the focusing assembly. The opening direction of the through hole is the same as the opening direction of the laser nozzle.

5. The laser cutting head according to claim 4, characterized in that: The follower assembly also has a protective cover, which is directly opposite to the opening of the through hole, and both ends of the protective cover are fixedly connected to the light guide tube housing.

6. The laser cutting head according to claim 1, characterized in that: The driving assembly includes a roller and a gear ring that cooperate with each other. The gear ring is connected to the flange. The roller rotates to drive the gear ring and the flange to rotate.

7. The laser cutting head according to claim 6, characterized in that: The laser cutting head includes a collimation assembly, and the drive assembly includes a first drive assembly and a second drive assembly, the first drive assembly is connected to the collimation assembly, and the second drive assembly is respectively connected to the first drive assembly and the follower assembly; The first driving assembly can drive the second driving assembly to rotate, and the second driving assembly can drive the follower assembly to rotate.

8. A laser cutting machine, characterized in that: include: The laser cutting head according to any one of claims 1 to 7; a cantilever beam, the laser cutting head being mounted on the cantilever beam; A frame, one end of the cantilever beam is connected to the frame.

9. The laser cutting machine according to claim 8, characterized in that: The cantilever beam has a receiving cavity, and a reinforcing component is arranged in the receiving cavity. The reinforcing component is used to improve the structural strength of the cantilever beam.

10. The laser cutting machine according to claim 9, characterized in that: The reinforcement components are all provided with weight-reducing holes.

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