Laser cutting head and laser cutter

Abstract

The utility model discloses a laser cutting head and a laser cutter, and belongs to the technical field of laser cutting. The device comprises a base body, a lens barrel, a sliding assembly and a moving assembly, the lens barrel comprises a detachable lens and a contact sensing unit, the contact sensing unit is connected with the lens barrel and arranged opposite to the lens, and the contact sensing unit can identify whether the lens exists or not; the lens barrel is slidably connected with the seat body through the sliding assembly. The moving assembly comprises a rotatable screwing piece and a spiral telescopic piece, and the screwing piece is rotationally connected with the seat body; the spiral telescopic piece is in threaded connection with the screwing piece, one end of the spiral telescopic piece is connected with the sliding assembly, and the screwing piece can drive the spiral telescopic piece to drive the lens cone to linearly move relative to the base. According to the laser cutter, the movement of the lens cone relative to the seat body can be adjusted by utilizing a lead screw nut pair which is reversely applied, the focus of laser relative to an object to be cut is changed, the transmission structure of the laser cutter is optimized, and more convenient operation is realized.

Description

Technical Field

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

[0002] Laser processing technology is a new cutting technology that uses the characteristics of the interaction between a laser beam and a substance to cut, punch, micro-machine, etc. materials. Laser processing technology has the characteristics of fast speed, no extrusion, and few burrs, so it has been more and more widely used.

[0003] The utility model patent with the publication number of CN103358019B discloses a laser cutting head. The laser cutting head controls the up and down movement of a telescopic column through a first cylinder, controls the horizontal movement of a slider through a second cylinder, controls the rotation of a base in a vertical plane through a first motor, and controls the rotation of a nozzle in a vertical plane through a second motor, so that the nozzle can finally face a specified workpiece position.

[0004] However, the up and down movement structure of the existing laser cutting head can adjust the distance between the entire lens and the cutting material, so as to adjust the laser cutting focus. However, the existing movement structure is too simple, with low precision and inconvenient adjustment. Summary of the Utility Model

[0005] In view of this, it is necessary to provide a laser cutting head to solve the problem that it is difficult to focus the existing laser cutting head.

[0006] In a first aspect, the utility model provides a laser cutting head, comprising:

[0007] A base body;

[0008] A lens barrel, the lens barrel includes a detachable lens and a contact sensing unit, the contact sensing unit is connected to the lens barrel and is arranged opposite to the lens, and the contact sensing unit can identify the presence or absence of the lens;

[0009] A sliding component, the lens barrel is slidably connected to the base body through the sliding component;

[0010] A moving component, the moving component includes a rotatable screwing member and a screw telescopic member, the screwing member is rotatably connected to the base body; the screw telescopic member is threadedly connected to the screwing member, one end of the screw telescopic member is connected to the sliding component, and the screwing member can drive the screw telescopic member to drive the lens barrel to move linearly relative to the base body.

[0011] Further, the sliding assembly includes a first U-shaped clamping member and a sliding unit. The first U-shaped clamping member is sleeved on the seat body. The seat body is slidably connected to the first U-shaped clamping member through the sliding unit. The closed end of the first U-shaped clamping member is fixedly connected to the lens barrel, and the open end of the first U-shaped clamping member is connected to the spiral telescopic member.

[0012] Further, the sliding unit includes a guide rail and a slider. The guide rail is fixedly connected to the seat body. The slider is fixedly connected to the first U-shaped clamping member. The slider is slidably clamped in the guide rail.

[0013] Further, the moving assembly further includes a second U-shaped clamping member. The open end of the second U-shaped clamping member faces the open end of the first U-shaped clamping member. The two ends of the second U-shaped clamping member are respectively connected to the two ends of the first U-shaped clamping member. The second U-shaped clamping member and the first U-shaped clamping member together form an installation space for accommodating the rotating shaft of the cutting head.

[0014] Further, the moving assembly further includes a housing and a driving member. The housing is fixedly connected to the seat body. The rotating connector is arranged in the housing. The driving member is rotatably connected to the rotating connector.

[0015] Further, the contact sensing unit includes at least one first elastic contact. The lens is arranged opposite to the first elastic contact. The first elastic contact abuts against the lens.

[0016] Further, it further includes an anti-collision alarm assembly. The anti-collision alarm assembly further includes a plurality of anti-collision alarm units. The lens barrel further includes a lens base and a lens. The lens is flexibly connected to the lens base. The anti-collision alarm units are arranged between the lens base and the lens. The plurality of anti-collision alarm units are equidistantly arranged around the central axis of the lens.

[0017] Further, the anti-collision alarm unit includes a second elastic contact. The second elastic contact is fixedly connected to the lens. The lens base abuts against the second elastic contacts of a plurality of the anti-collision alarm units at the same time.

[0018] In a second aspect, the present utility model provides a laser cutter, including the above-mentioned laser cutting head.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] (1) A laser cutting head and a laser cutter of the present utility model are provided with a lens barrel. The lens barrel includes a lens and a contact sensing unit. The lens is detachably connected to the lens barrel, and the lens can be disassembled and assembled according to actual processing needs and maintenance needs to replace lenses of different specifications. The contact sensing unit is connected to the lens barrel and is arranged opposite to the lens. The contact sensing unit can identify the presence or absence of the lens to prevent the laser cutting head from being started when the lens is missing, causing serious damage to the equipment. The lens barrel is slidably connected to the base body through a sliding component, and the lens barrel can move relative to the base body along a straight line by means of the sliding component, realizing the overall lifting of the lens barrel. The sliding component can provide support for the lens barrel and limit the lens barrel to perform precise and smooth displacement, thereby ensuring the accuracy of focus adjustment.

[0021] (2) A laser cutting head and a laser cutter of the present utility model are provided with a moving component. The moving component includes a rotatable screwing member and a screw telescopic member. The screwing member is rotatably connected to the base body, and the screw telescopic member is threadedly connected to the screwing member. One end of the screw telescopic member is connected to the sliding component. The screwing member can rotate relative to the base body as an active member. The screw telescopic member threadedly connected to the screwing member is blocked by the sliding component and can only move along a straight line, realizing the overall lifting of the lens barrel, changing the distance between the lens and the cutting material, and thus adjusting the laser focus. The linear movement achieved through screw transmission can precisely control the position of the lens barrel, thereby precisely adjusting the laser focus and improving the cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0023] Figure 1 is a schematic structural view of the whole of the present utility model Figure 1 ;

[0024] Figure 2 is a schematic structural view of the sliding component and the moving component in the present utility model;

[0025] Figure 3 is a schematic structural view of the base body and the lens barrel in the present utility model;

[0026] Figure 4 is a schematic structural view of the whole of the present utility model Figure 2 ;

[0027] Figure 5 is Figure 4 a cross-sectional view of A - A' in

[0028] Figure 6 is Figure 4 a cross-sectional view of B - B' in

[0029] Figure 7 is a schematic diagram of the structure of the lens in the present utility model Figure 1 ;

[0030] Figure 8 is Figure 8 a schematic cross-sectional view of C-C' in

[0031] Figure 9 is a schematic diagram of the structure of the lens in the present utility model Figure 2 。

[0032] In the figure, 100 is the base body;

[0033] 200 is the lens barrel; 210 is the lens; 220 is the contact sensing unit; 221 is the first elastic contact; 230 is the lens holder; 240 is the lens;

[0034] 300 is the sliding assembly; 310 is the first U-shaped clamping member; 320 is the sliding unit; 321 is the guide rail; 322 is the slider;

[0035] 400 is the moving assembly; 410 is the rotary joint; 420 is the screw telescopic member; 430 is the second U-shaped clamping member; 440 is the housing; 450 is the driving member;

[0036] 500 is the anti-collision alarm assembly; 510 is the anti-collision alarm unit; 511 is the second elastic contact. Detailed implementation manners

[0037] The following will specifically describe the preferred embodiments of the present utility model in conjunction with the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present utility model to explain the principle of the present utility model, rather than to limit the scope of the present utility model.

[0038] A laser cutting head and a laser cutter in this embodiment relate to the technical field of laser cutting. By arranging a moving assembly 400 between the lens barrel 200 and the base body 100, the movement of the lens barrel 200 relative to the base body 100 is adjusted by using the reverse-applied screw-nut pair, the focus of the laser relative to the object to be cut is changed, the transmission structure of the laser cutter is optimized, and more convenient operation is achieved.

[0039] Please refer to Figures 1 to 9 , a laser cutting head in this embodiment includes: a base body 100, a lens barrel 200, a sliding assembly 300, and a moving assembly 400. Among them,

[0040] The base body 100 is the basic framework of the entire laser cutting head, supports and connects other components, and ensures the structural stability and accuracy of the cutting head.

[0041] The lens barrel 200 includes a lens 210 and a contact sensing unit 220. The lens 210 is detachably connected to the lens barrel 200. According to actual processing and maintenance needs, the lens 210 can be disassembled and assembled to replace lenses 210 of different specifications. The contact sensing unit 220 is connected to the lens barrel 200 and is arranged relative to the lens 210. The contact sensing unit 220 can identify the presence or absence of the lens 210, preventing the laser cutting head from being activated when the lens 210 is missing and causing serious damage to the equipment.

[0042] The lens barrel 200 is slidably connected to the base body 100 through a sliding component 300. The lens barrel 200 can move relative to the base body 100 along a straight line direction by means of the sliding component 300, realizing the overall lifting of the lens barrel 200. The sliding component 300 can provide support for the lens barrel 200 and limit the lens barrel 200 to perform precise and smooth displacement, thereby ensuring the accuracy of focus adjustment.

[0043] The moving component 400 includes a rotatable screwing member 410 and a screw telescopic member 420. The screwing member 410 is rotatably connected to the base body 100, the screw telescopic member 420 is threadedly connected to the screwing member 410, and one end of the screw telescopic member 420 is connected to the sliding component 300. The screwing member 410 can rotate relative to the base body 100 as the driving member. The screw telescopic member 420 threadedly connected to the screwing member 410 is blocked by the sliding component 300 and can only move along a straight line direction, realizing the overall lifting of the lens barrel 200, changing the distance between the lens 210 and the cutting material, and thus adjusting the laser focus. The linear movement achieved through screw drive can precisely control the position of the lens barrel 200, thereby precisely adjusting the laser focus and improving the cutting quality.

[0044] It should be particularly noted that: different from the general screw-nut transmission structure, the screw telescopic member 420 is restricted by the sliding component 300 and can only move axially and cannot rotate. The screwing member 410 rotates relative to the screw telescopic member 420 under the drive of an external force. There is no need to set a screw seat, which can effectively reduce the required space of the transmission structure and realize the high integration of the laser cutting head.

[0045] In the specific implementation process, the screw telescopic member 420 is a lead screw, the screwing member 410 is a nut sleeve. The outer ring of the nut sleeve is connected to the base body 100 through a bearing, and the inner ring of the nut sleeve is threadedly connected to the lead screw. The nut sleeve rotating relative to the base body 100 can drive the lead screw to move linearly, thereby pushing the lens barrel 200 to move linearly and maintaining self-locking.

[0046] In some embodiments, please refer to Figure 2 and Figure 3, the sliding assembly 300 includes a first U-shaped clamping member 310 and a sliding unit 320. Through the cooperation of the first U-shaped clamping member 310 and the sliding unit 320, stable linear sliding and precise adjustment of the laser cutting focus can be achieved.

[0047] The first U-shaped clamping member 310 is sleeved on the base body 100. The first U-shaped clamping member 310 includes two side portions and a connecting portion. The two ends of the connecting portion are respectively connected to the two side portions, forming a semi-enclosed space that is recessed inward. The entire base body 100 is located in the semi-enclosed space. The two sides of the base body 100 are slidably connected to the side portions through the sliding unit 320. The U-shaped clamping member has strong structural rigidity, providing strong mechanical support, and can effectively resist external force interference caused by the movement of the cutting head, thereby ensuring the stability and precision during laser cutting.

[0048] The closed end (connecting portion) of the first U-shaped clamping member 310 is fixedly connected to the lens barrel 200. The displacement brought by the screw telescopic member 420 is transmitted to the U-shaped clamping member and then to the lens barrel 200. Through this linear transmission structure, precise adjustment of the laser focus is achieved. Due to the strong structural rigidity of the U-shaped clamping member, it can effectively ensure that the linear movement direction of the lens barrel 200 remains unchanged, thereby improving the accuracy of focus adjustment.

[0049] As a further implementation manner, the sliding unit 320 includes a guide rail 321 and a slider 322. The two guide rails 321 are fixedly connected to the base body 100, forming a sliding channel between the two guide rails 321. The slider 322 is fixedly connected to the first U-shaped clamping member 310. The slider 322 is slidably inserted into the sliding channel. The two sides of the slider 322 are respectively slidably clamped to the guide rail 321, providing a defined sliding path, avoiding the situation of offset, tilt or non-linear movement of the lens barrel 200 during adjustment, and ensuring the high accuracy of laser focus adjustment.

[0050] The close cooperation between the guide rail 321 and the slider 322 provides a stable sliding connection. The slider 322 is firmly clamped in the guide rail 321 without loosening or shaking, improving the stability of the sliding process and ensuring that the laser cutting head is not interfered by external factors (such as vibration or external force) when adjusting the focus.

[0051] Generally, the guide rail 321 and the slider 322 are relatively smooth and lubricated to ensure a smooth and fluent sliding process, which can effectively reduce the frictional resistance during the sliding process, avoid jamming phenomena, enable the laser cutting head to be adjusted quickly and without obstacles, and improve the efficiency and experience of the operation.

[0052] In the specific implementation process, notches are provided on both sides of the slider 322 to cooperate with the guide rail 321. The notches can expand the contact area between the slider 322 and the guide rail 321. The large contact area makes the contact between the slider 322 and the guide rail 321 closer, reducing the wobbling or loosening of the slider 322 in the guide rail 321, enhancing the stability during the sliding process, and ensuring the laser cutting head remains stable during movement.

[0053] The larger contact area enables the slider 322 to run more firmly in the guide rail 321, helping to avoid changes in the focal position caused by mechanical fatigue or external interference, thereby improving the accuracy of laser cutting.

[0054] In some embodiments, please continue to refer to Figure 2 and Figure 3 , the moving component 400 further includes a second U-shaped clamping member 430.

[0055] The open end of the second U-shaped clamping member 430 faces the open end of the first U-shaped clamping member 310. The two ends of the second U-shaped clamping member 430 are respectively connected to the two ends of the first U-shaped clamping member 310, forming an installation space for accommodating the rotating shaft of the cutting head. The setting of the installation space allows the cutting head to rotate and adjust around the rotating shaft, enabling the laser cutting head to not only perform linear movement (achieved through the sliding component 300) but also rotate within a certain range, providing additional degrees of freedom.

[0056] It should be added that the combined structure of the double U-shaped clamping members creates a stable and flexible support system, which not only provides the necessary structural rigidity to fix the cutting head but also allows the cutting head to rotate within a controlled range. The combined structure of the double U-shaped clamping members provides a flexible way to adjust the cutting head, expanding the application range of the device, enabling it to not only perform planar cutting but also adapt to the processing of complex workpieces such as curved surfaces and inclined surfaces.

[0057] The combination of the second U-shaped clamping member 430 and the first U-shaped clamping member 310 forms a double-layer support structure, significantly enhancing the mechanical strength of the overall device. The double-layer support structure makes the cutting head more stable during rotation and movement, reducing the deviation or instability caused by mechanical vibration or external impact.

[0058] In some embodiments, please refer to Figures 1 to 3 , the moving component 400 further includes a housing 440 and a driving member 450. The housing 440 is fixedly connected to the base body 100. The rotary joint 410 is disposed in the housing 440, enclosing the rotary joint 410 within the housing 440, which can prevent external factors such as dust, debris, and moisture from causing wear or damage to mechanical components and affecting their operating stability.

[0059] The housing 440 encapsulates the rotary connector 410 and the driving member 450 in an independent structure, which not only improves the modular design of the entire device, but also makes it more convenient to disassemble or replace this module when equipment maintenance or replacement is required, shortening the maintenance time and enhancing the convenience of maintenance.

[0060] The driving member 450 is rotatably connected to the rotary connector 410. The driving member 450 can drive the entire cutting head to move through the rotary connector 410, enabling the cutting head to move smoothly without jamming during the movement, thus improving the movement efficiency. This is particularly important for laser cutting that requires rapid and precise adjustment of the focus position.

[0061] In the specific implementation process, the driving member 450 is a servo motor, and the servo motor can accurately adjust the rotation angle and number of turns according to pulses to achieve precise control of the rotary connector 410.

[0062] In some embodiments, please refer to Figure 7 and Figure 8 , the contact sensing unit 220 includes at least one first elastic contact 221. The lens 210 is disposed opposite to the first elastic contact 221 and the two are in mutual abutment. Through the minute displacement change of the elastic contact, the presence or absence of the lens 210 can be detected in real time. When the lens 210 is installed or removed, the elastic contact will generate corresponding feedback to provide a reliable signal to indicate whether the lens 210 is in the correct position. This detection mechanism ensures that the lens 210 has been correctly installed before the laser cutting head operates, avoiding cutting errors caused by the absence or improper installation of the lens 210.

[0063] The first elastic contact 221 has elastic characteristics and can be finely adjusted to adapt to different pressure changes. The first elastic contact 221 can sensitively detect the presence of the lens 210 and accurately feedback signals. Compared with hard contact sensors, elastic contacts can provide higher sensitivity and accuracy, especially in the case of small displacements or minute state changes.

[0064] In some embodiments, please refer to Figure 9 , a laser cutting head further includes an anti-collision alarm assembly 500. The anti-collision alarm assembly 500 further includes a plurality of anti-collision alarm units 510. The lens barrel 200 further includes a lens seat 230 and a lens 240. The lens 240 is flexibly connected to the lens seat 230. The anti-collision alarm units 510 are disposed between the lens seat 230 and the lens 240, and the plurality of anti-collision alarm units 510 are equidistantly arranged around the central axis of the lens 240. The anti-collision alarm units 510 can achieve 360-degree omnidirectional monitoring of the lens 240. When the laser cutting head approaches the workpiece surface or other obstacles during operation, the anti-collision alarm units 510 can quickly detect a slight collision to avoid a direct rigid collision between the cutting head and an object, causing serious damage.

[0065] When the anti-collision alarm unit 510 detects a potential collision, it can give an alarm in time to remind the operator or the device to automatically adjust the moving path of the cutting head or stop the operation, so as to avoid accidental injury to the workpiece by the laser cutting head or damage to the device itself without affecting the cutting accuracy.

[0066] As a further implementation manner, the anti-collision alarm unit 510 includes a second elastic contact 511. The second elastic contact 511 is fixedly connected to the lens 240. The lens holder 230 abuts against the second elastic contacts 511 of multiple anti-collision alarm units 510 at the same time. When the cutting head approaches the workpiece or has a slight collision during the processing, the elastic contact can play a role in absorbing vibration, thereby reducing the risk of damage to the device caused by the collision.

[0067] It should be added that both the second elastic contact 511 and the first elastic contact 221 are normally closed contacts. When the lens 210 is missing, the first elastic contact 221 can be triggered. When the lens 240 has a slight collision, the lens 240 is slightly displaced, and the second elastic contact 511 can be triggered. The second elastic contact 511 and the first elastic contact 221 are electrically connected to the controller. When the second elastic contact 511 and the first elastic contact 221 are triggered, the controller can control the laser cutting head to stop urgently and automatically retract.

[0068] A laser cutter in this embodiment includes a laser cutting head. The laser cutting head is installed on a multi-axis machine tool, and the machine tool can perform cutting processing on parts.

[0069] Working process: The laser cutter first moves the laser cutting head to the position to be cut of the part through the multi-axis moving mechanism, starts the moving component 400, the servo motor drives the rotary connector 410 to rotate and connect, and the driving component 450 can drive the entire lens barrel 200 to move through the rotary connector 410, changing the distance between the lens barrel 200 and the part to be processed, and roughly changing the focus of the laser beam. Finally, the focusing device is used to precisely adjust the focus of the laser beam to ensure that the energy of the laser is concentrated. The transmission structure of the laser cutter is effectively optimized to achieve more convenient operation.

[0070] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the present invention.

Claims

1. A laser cutting head, characterized in that, Comprising: A base body; A lens barrel, the lens barrel including detachable lenses and a contact sensing unit, the contact sensing unit being connected to the lens barrel and disposed opposite the lenses, the contact sensing unit being capable of identifying the presence or absence of the lenses; A sliding assembly, the lens barrel being slidably connected to the base body through the sliding assembly; A moving assembly, the moving assembly including a rotatable screwed joint and a screw telescopic member, the screwed joint being rotatably connected to the base body; the screw telescopic member being threadedly connected to the screwed joint, one end of the screw telescopic member being connected to the sliding assembly, the screwed joint being capable of driving the screw telescopic member to drive the lens barrel to linearly move relative to the base body.

2. The laser cutting head according to claim 1, characterized in that, The sliding assembly includes a first U-shaped clamping member and a sliding unit, the first U-shaped clamping member being sleeved on the base body, the base body being slidably connected to the first U-shaped clamping member through the sliding unit, the closed end of the first U-shaped clamping member being fixedly connected to the lens barrel, and the open end of the first U-shaped clamping member being connected to the screw telescopic member.

3. A laser cutting head according to claim 2, wherein, The sliding unit includes a guide rail and a slider, the guide rail being fixedly connected to the base body, the slider being fixedly connected to the first U-shaped clamping member, and the slider being slidably clamped in the guide rail.

4. A laser cutting head according to claim 3, wherein, The moving assembly further includes a second U-shaped clamping member, the open end of the second U-shaped clamping member being arranged facing the open end of the first U-shaped clamping member, both ends of the second U-shaped clamping member being respectively connected to both ends of the first U-shaped clamping member, and the second U-shaped clamping member and the first U-shaped clamping member jointly form an installation space for accommodating the rotating shaft of the cutting head.

5. A laser cutting head according to claim 1, characterized in that, The moving assembly further includes a housing and a driving member, the housing being fixedly connected to the base body, the screwed joint being arranged in the housing, and the driving member being rotatably connected to the screwed joint.

6. A laser cutting head according to claim 1, characterized in that, The contact sensing unit includes at least one first elastic contact, the lens being disposed opposite the first elastic contact, and the first elastic contact being in contact with the lens.

7. A laser cutting head according to claim 1, characterized in that, Further comprising an anti-collision alarm assembly, the anti-collision alarm assembly further including a plurality of anti-collision alarm units, the lens barrel further including a lens base and a lens, the lens being flexibly connected to the lens base, the anti-collision alarm units being arranged between the lens base and the lens, and the plurality of anti-collision alarm units being equidistantly arranged around the central axis of the lens.

8. A laser cutting head according to claim 7, characterized in that, The anti-collision alarm unit includes a second elastic contact, the second elastic contact being fixedly connected to the lens, and the lens base being in contact with the second elastic contacts of the plurality of anti-collision alarm units simultaneously.

9. A laser cutter, characterized in that, Including a laser cutting head according to any one of claims 1-8.

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