Laser processing head and laser processing apparatus

Abstract

The utility model belongs to the field of laser processing technology discloses a kind of laser processing head and laser processing equipment, including shell, focusing structure and drive mechanism.Light passage is arranged in shell, collimating mirror and focusing mirror are sequentially arranged in light passage;Focusing structure can selectively intervene or remove light passage to adjust the magnification of laser processing head;Drive mechanism is arranged in shell, and drive mechanism is used to drive focusing structure linearly moves in the direction perpendicular to the axis of light passage, so that focusing structure intervenes or removes light passage.The laser processing head provided by the utility model has a first magnification and a second magnification, and the focusing position of the laser processing head is easy to adjust, the overall structure is simple, and the operation is simple.The laser processing equipment of the utility model comprises the above laser processing head.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a laser processing head and laser processing equipment. Background Technology

[0002] A laser cutting machine is a cutting machine that uses a fiber laser generator as its light source. A fiber laser is a new type of laser capable of outputting a high-energy-density laser beam. This beam can be focused onto the surface of a workpiece, causing the area irradiated by the ultra-fine focal spot to melt and vaporize instantly. Automatic cutting is achieved by moving the spot's irradiation position through a CNC mechanical system. Fiber laser cutting machines can perform both planar and bevel cutting, producing clean, smooth edges, making them suitable for high-precision cutting of metal plates and other materials.

[0003] The cutting head is a crucial component of a fiber laser cutting machine. When cutting different materials, the laser processing head often requires different powers and focusing lenses with varying magnifications. During focusing, the focusing lens needs to be changed.

[0004] The existing technology uses a bulky adjustment mechanism to adjust the position of the lens group, thereby switching between different lens groups and adjusting the focusing position of the cutting head. This adjustment method uses a large adjustment mechanism that occupies a lot of space and is difficult to install; secondly, the process of replacing the focusing lens is cumbersome, requiring the entire adjustment mechanism to be disassembled, which is not conducive to the daily maintenance of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a laser processing head and laser processing equipment, which aims to solve the problems of complicated adjustment process of the cutting head focus position, large space occupation of the adjustment mechanism, and high installation difficulty in the prior art. The laser processing head and laser processing equipment have simple focus position adjustment and the laser processing head occupies less space in the direction of the light output channel.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A laser processing head, comprising:

[0008] A housing, wherein a light-emitting channel is provided inside the housing, and a collimating lens and a focusing lens are arranged sequentially inside the light-emitting channel;

[0009] A focusing structure that can selectively intervene in or move out of the light output channel to adjust the magnification of the laser processing head;

[0010] A driving mechanism is disposed in the housing. The driving mechanism is used to drive the focusing structure to move linearly in a direction perpendicular to the axis of the light output channel, so that the focusing structure enters or exits the light output channel.

[0011] In some possible implementations, the focusing structure includes a lens barrel and a zoom lens assembly disposed within the lens barrel. The zoom lens assembly includes convex lenses and concave lenses arranged at intervals, with a spacer between the convex lenses and the concave lenses for support and positioning.

[0012] In some possible implementations, the drive mechanism includes a drive member mounted on the housing and a lead screw that is pulsatorically connected to the drive member, the lead screw being fixedly connected to the lens barrel via a connector.

[0013] In some possible implementations, the laser processing head further includes a mounting base, the lens barrel is detachably mounted on the mounting base, the connector has an electromagnetic chuck on the side near the lens barrel, and the mounting base is provided with an electromagnetic adsorption component corresponding to the electromagnetic chuck on the side near the connector.

[0014] In some possible implementations, the mounting base is configured as a cylindrical structure, the outer wall of the lens barrel is provided with an electromagnetic bonding member, and the inner wall of the mounting base is provided with an electromagnetic locking member corresponding to the electromagnetic bonding member.

[0015] In some possible implementations, the laser processing head further includes a guide structure comprising a guide rod and a guide rail, wherein the guide rod is disposed on the connector and the guide rail is disposed on the housing, or the guide rod is disposed on the housing and the guide rail is disposed on the connector.

[0016] In some possible implementations, an operation opening is provided on one side of the housing, and a first panel is detachably mounted on the operation opening. The first panel corresponds to the focusing structure and is used to replace the focusing structure.

[0017] In some possible implementations, the laser processing head further includes a back plate, the operation opening is disposed on the side of the housing away from the back plate, the housing or the back plate has a receiving cavity communicating with the light output channel, and the focusing structure has a first position and a second position. When in the first position, the focusing structure is disposed in the light output channel and located between the collimating lens and the focusing lens. When in the second position, the focusing structure is located in the receiving cavity.

[0018] In some possible implementations, sealing plates are provided on both sides of the lens barrel.

[0019] A laser processing device includes a laser and a laser processing head as described in any of the above embodiments, wherein the output head of the laser is connected to the laser processing head.

[0020] The beneficial effects of this utility model are:

[0021] The laser processing head provided by this utility model features a driving mechanism that linearly moves the focusing structure, allowing it to enter or exit the light output channel. When the focusing structure is in the light output channel, the light beam passes sequentially through a collimating lens, a zoom lens assembly, and a focusing lens, resulting in a first magnification for the laser processing head. When the focusing structure is pulled out of the light output channel, the light beam passes sequentially through the collimating lens and the focusing lens, resulting in a second magnification for the laser processing head. This allows for adjustment of the focusing position of the laser processing head. The overall structure is simple and easy to operate. By changing the position of the focusing structure through translation, the space occupied by the laser processing head in the light output channel direction can be reduced, providing convenience for use.

[0022] The laser processing equipment provided by this utility model uses the aforementioned laser processing head, which has a first magnification and a second magnification. The focusing position of the laser processing head is easy to adjust, and the laser processing head occupies a small space in the direction of the light output channel. Attached Figure Description

[0023] Figure 1 This is a three-dimensional view of the laser processing head from one perspective provided in this embodiment of the utility model;

[0024] Figure 2 This is a side view of the laser processing head provided in this embodiment of the utility model;

[0025] Figure 3 yes Figure 2 Cross-sectional view at point AA (when the focusing structure is located in the light output channel);

[0026] Figure 4 yes Figure 2 A cross-sectional view at point AA (when the focusing structure moves out of the light exit channel);

[0027] Figure 5 This is a three-dimensional view of the laser processing head from another perspective provided in this embodiment of the utility model;

[0028] Figure 6 This is a partial exploded view of the laser processing head provided in this embodiment of the present invention;

[0029] Figure 7 This is a top view of the laser processing head provided in this embodiment of the utility model;

[0030] Figure 8 yes Figure 7 A cross-sectional view at the middle EE (when the focusing structure is located in the light output channel);

[0031] Figure 9 yes Figure 7 A cross-sectional view at the middle EE (when the focusing structure moves out of the light exit channel);

[0032] Figure 10 yes Figure 7 A cross-sectional view at the middle EE (when the focusing structure is in the middle position);

[0033] Figure 11 This is a top view showing the installation distribution of the drive mechanism in two implementations provided by this utility model: the accommodating cavity is located inside the back plate and the housing.

[0034] Figure 12 This is a cross-sectional view showing the installation distribution of the drive mechanism in two implementations provided by this utility model: the accommodating cavity is located inside the back plate and the housing.

[0035] Figure 13 This is a schematic diagram of the structure of the first sealing plate and the second sealing plate provided in the embodiment of this utility model.

[0036] In the picture:

[0037] 100. Housing; 110. Light exit channel; 200. Protective lens; 300. Collimating lens; 400. Focusing structure; 410. Lens barrel; 420. Zoom lens assembly; 421. Convex lens; 422. Concave lens; 430. Spacer; 500. Focusing lens; 600. Back plate; 610. Receiving cavity; 700. Drive mechanism; 710. Drive component; 720. Lead screw; 800. Connector; 900. Electromagnetic chuck; 1010. First sealing plate; 1020. Second sealing plate; 1100. Mounting base; 1200. Panel assembly; 1310. Guide rod; 1320. Guide rail; 1400. First dust cover; 1500. Second dust cover; 1600. Third dust cover. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] This embodiment provides a laser processing head that can quickly adjust the magnification of the focusing lens. The overall structure is simple and easy to maintain.

[0043] like Figures 1 to 13 As shown, the laser processing head includes a housing 100, a focusing structure 400, and a driving mechanism 700. A light-emitting channel 110 is provided within the housing 100, and a protective mirror 200, a collimating mirror 300, a focusing mirror 500, and another protective mirror 200 are arranged sequentially within the light-emitting channel 110. An optical cavity is provided at the top of the housing 100, communicating with the light-emitting channel 110, and is used to connect a laser generating device. A nozzle is provided at the bottom of the housing 100, communicating with the light-emitting channel 110, and is used to output a laser beam. The focusing structure 400 can selectively engage or disengage from the light-emitting channel 110 to adjust the magnification of the laser processing head. The driving mechanism 700 is located within the housing 100 and is used to drive the focusing structure 400 to move linearly along a direction perpendicular to the axis of the light-emitting channel 110, thereby engaging or disengaging the focusing structure 400 from the light-emitting channel 110.

[0044] The laser processing head of this embodiment uses a driving mechanism 700 to drive the focusing structure 400 to move linearly, allowing the focusing structure 400 to enter or exit the light output channel 110. When the focusing structure 400 is in the light output channel 110, the light beam passes sequentially through the collimating lens 300, the zoom lens assembly 420, and the focusing lens 500, giving the laser processing head a first magnification. When the driving mechanism 700 pulls the focusing structure 400 out of the light output channel 110, the light beam passes sequentially through the collimating lens 300 and the focusing lens 500, giving the laser processing head a second magnification. This adjusts the focusing position of the laser processing head. The overall structure is simple and easy to operate. By changing the position of the focusing structure 400 through push-pull translation, the space occupied by the laser processing head in the direction perpendicular to translation can be reduced, providing convenience for use.

[0045] like Figure 3 and Figure 4 As shown, in this embodiment, the focusing structure 400 includes a lens barrel 410 and a zoom lens assembly 420 disposed within the lens barrel 410. The zoom lens assembly 420 includes convex lenses 421 and concave lenses 422 arranged at intervals, with a spacer 430 between the convex lenses 421 and concave lenses 422 for support and limitation. The superposition of the convex lenses 421, concave lenses 422, and focusing lens 500 can effectively change the magnification of the laser processing head; the spacer 430 can isolate the convex lenses 421 and concave lenses 422 and play a supporting and limiting role. It should be noted that when the focusing structure 400 is in the first position, the line connecting the convex lenses 421 and concave lenses 422 is a vertical line, which coincides with the center line of the beam; when the focusing structure 400 is in the second position, the line connecting the convex lenses 421 and concave lenses 422 is a horizontal line.

[0046] like Figure 5 As shown, optionally, the drive mechanism 700 includes a drive member 710 mounted on the housing 100 and a lead screw 720 that is pulsatorically connected to the drive member 710. The lead screw 720 is fixedly connected to the lens barrel 410 via a connector 800. The drive assembly includes the drive member 710 and the lead screw 720, has a simple structure, and does not require a large space. Optionally, the drive member 710 can be configured as a cylinder or a linear motor.

[0047] In one possible implementation, the lens barrel 410 can be directly mounted on the connector 800 using a threaded component such as a screw, simplifying the structure and making disassembly and assembly convenient.

[0048] like Figure 6As shown, optionally, an operation opening is provided on one side of the housing 100, and a panel assembly 1200 is detachably installed on the operation opening. The panel assembly 1200 includes a first panel and a second panel that are detachably connected. The second panel corresponds to the collimating lens 300, and the first panel corresponds to the focusing structure 400. By setting the first panel and the second panel, the collimating lens 300 and the upper protective lens 200 can be replaced by opening the second panel, and the focusing structure 400 can be replaced by opening the first panel. During replacement, only the zoom lens assembly 420 with a different magnification needs to be replaced to change the focusing distance of the laser processing head. During operation, the corresponding lens can be replaced by opening the corresponding panel in a dust-free environment without disassembling the back plate 600 or other components, reducing the complexity of operation and enabling a quick and convenient replacement process, thus improving replacement efficiency.

[0049] like Figure 3 , Figure 4 and Figure 6 As shown, the laser processing head further includes a back plate 600, with an operation opening located on the side of the housing 100 away from the back plate 600. The back plate 600 has a receiving cavity 610 communicating with the light output channel 110. The focusing structure 400 has a first position and a second position. In the first position, the focusing structure 400 is positioned in the light output channel 110 and between the collimating lens 300 and the focusing lens 500. In the second position, the focusing structure 400 is located in the receiving cavity 610. When the focusing structure 400 is moved out of the light output channel 110, it is wholly or mostly housed within the receiving cavity 610, avoiding interference with beam propagation. Simultaneously, the receiving cavity 610 protects the focusing structure 400 from external environmental influences. It is understood that, as Figures 7 to 10 As shown, the accommodating cavity 610 can also be disposed within the housing 100. The accommodating cavity 610 is located on one side of the light output channel 110, and the drive mechanism 700 is disposed within the back plate 600, thus avoiding the influence of the external environment. In addition, when the accommodating cavity 610 is disposed within the housing 100, the lens barrel 410 and the collimating lens 300 are processed on the same reference plane, which improves the accuracy of the optical system.

[0050] like Figure 9 , Figure 11 and Figure 12As shown in both figures, the installation distribution of the drive mechanism 700 is illustrated in two implementations: one where the accommodating cavity 610 is located within the back plate 600, and the other within the housing 100. When the accommodating cavity 610 is located within the back plate 600, the drive mechanism 700 is distributed along the thickness direction of the back plate 600; when the accommodating cavity 610 is located within the housing 100, the drive mechanism 700 is distributed along the length direction of the back plate 600. As can be seen from the figures, a second dust cover 1500 is provided on the outer side of the guide structure of the laser processing head, a first dust cover 1400 is provided on the outer side of the lead screw 720, and a third dust cover 1600 is provided on the outer side of the lens frame of the focusing structure 400, to prevent dust from entering the drive mechanism 700 or the lens frame and affecting the cleanliness of the focusing structure 400.

[0051] like Figure 13 As shown, optionally, sealing plates are provided on both sides of the lens barrel 410. The two sealing plates are a first sealing plate 1010 and a second sealing plate 1020. The first sealing plate 1010 is located on the side of the lens barrel 410 away from the light exit channel 110, and the second sealing plate 1020 is located on the side of the lens barrel 410 closer to the light exit channel 110. When the lens barrel 410 is located in the light exit channel 110, the first sealing plate 1010 seals the channel between the accommodating cavity 610 and the light exit channel 110, preventing dust in the accommodating cavity 610 from entering the light exit channel 110 and affecting the cleanliness of the optical components. When the lens barrel 410 is located in the accommodating cavity 610, the second sealing plate 1020 seals the channel between the accommodating cavity 610 and the light exit channel 110, preventing dust in the accommodating cavity 610 from entering the light exit channel 110 and affecting the cleanliness of the optical components.

[0052] Furthermore, a sealing ring is provided at the edge of the sealing plate. The sealing ring further improves the edge sealing effect and prevents dust from entering the light emission channel 110. For example, the sealing ring can be a rubber ring.

[0053] As a preferred option, such as Figure 1 and Figure 5 As shown, the laser processing head may further include a mounting base 1100, with the lens barrel 410 detachably mounted on the mounting base 1100. An electromagnetic chuck 900 is located on the side of the connector 800 near the lens barrel 410, and an electromagnetic adsorption component corresponding to the electromagnetic chuck 900 is provided on the side of the mounting base 1100 near the connector 800. When the electromagnetic chuck 900 is energized, it and the electromagnetic adsorption component are connected by an adsorption force, fixing the mounting base 1100 and the connector 800 together. When the electromagnetic chuck 900 is de-energized, its magnetic force disappears, and the mounting base 1100 can be removed from the connector 800. For example, the electromagnetic adsorption component may be made of stainless steel.

[0054] Optionally, the mounting base 1100 is configured as a cylindrical structure, with an electromagnetic bonding component on the outer wall of the lens barrel 410 and a corresponding electromagnetic locking component on the inner wall of the mounting base 1100. The lens barrel 410 and the mounting base 1100 are detachably connected through the cooperation of the electromagnetic bonding component and the electromagnetic locking component. The electromagnetic locking component can be configured with the same structure as the electromagnetic chuck 900, and the electromagnetic locking component is made of stainless steel.

[0055] like Figure 1 and Figure 12 As shown, preferably, the laser processing head also includes a guide structure, which includes a guide rod 1310 and a guide rail 1320. The guide rod 1310 is disposed on the connector 800, and the guide rail 1320 is disposed on the housing 100, or the guide rod 1310 is disposed on the housing 100, and the guide rail 1320 is disposed on the connector 800. By providing a guide structure, the movement stability of the connector 800 can be effectively improved.

[0056] Optionally, the laser processing head also includes a controller electrically connected to the drive unit 710, which is used to control the start and stop of the drive unit 710.

[0057] Preferably, a position sensor is also provided inside the housing 100 to detect the position of the lens barrel 410. For example, when the focusing structure 400 is in the first position, the focusing structure 400 is located in the light output channel 110 and between the collimating lens 300 and the focusing lens 500. The position sensor ensures that the zoom lens assembly 420 is positioned at the center of the light path of the beam within the light output channel 110 by detecting the position of the lens barrel 410. When the focusing structure 400 is in the second position, the focusing structure 400 is located within the accommodating cavity 610. The position sensor ensures that the focusing structure 400 does not obstruct the propagation of the light beam by detecting the position of the lens barrel 410.

[0058] This embodiment also provides a laser processing device, including a laser and the aforementioned laser processing head, with the output head of the laser connected to the laser processing head. By using the aforementioned laser processing head, the laser processing head has a first magnification and a second magnification, the focusing position of the laser processing head is easy to adjust, and the laser processing head occupies a small space in the direction of the light output channel 110.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A laser processing head, characterized in that, include: A housing (100) is provided inside the housing (100), and a light-emitting channel (110) is arranged in sequence inside the light-emitting channel (110) with a collimating lens (300) and a focusing lens (500); A focusing structure (400) is available to selectively engage or disengage from the light output channel (110) to adjust the magnification of the laser processing head. A drive mechanism (700) is disposed in the housing (100). The drive mechanism (700) is used to drive the focusing structure (400) to move linearly in a direction perpendicular to the axis of the light output channel (110), so that the focusing structure (400) enters or exits the light output channel (110).

2. The laser processing head according to claim 1, characterized in that, The focusing structure (400) includes a lens barrel (410) and a zoom lens assembly (420) disposed within the lens barrel (410). The zoom lens assembly (420) includes convex lenses (421) and concave lenses (422) arranged at intervals.

3. The laser processing head according to claim 2, characterized in that, The drive mechanism (700) includes a drive member (710) mounted on the housing (100) and a lead screw (720) that is driven by the drive member (710). The lead screw (720) is fixedly connected to the lens barrel (410) through a connector (800).

4. The laser processing head according to claim 3, characterized in that, The laser processing head also includes a mounting base (1100), the lens barrel (410) is detachably mounted on the mounting base (1100), the connector (800) has an electromagnetic chuck (900) on the side near the lens barrel (410), and the mounting base (1100) is provided with an electromagnetic adsorption component corresponding to the electromagnetic chuck (900) on the side near the connector (800).

5. The laser processing head according to claim 4, characterized in that, The mounting base (1100) is configured as a cylindrical structure, and an electromagnetic bonding component is provided on the outer wall of the lens barrel (410). An electromagnetic locking component corresponding to the electromagnetic bonding component is provided on the inner wall of the mounting base (1100).

6. The laser processing head according to claim 4, characterized in that, The laser processing head further includes a guide structure, which includes a guide rod (1310) and a guide rail (1320). The guide rod (1310) is disposed on the connector (800), and the guide rail (1320) is disposed on the housing (100), or the guide rod (1310) is disposed on the housing (100), and the guide rail (1320) is disposed on the connector (800).

7. The laser processing head according to claim 1, characterized in that, An operation opening is provided on one side of the housing (100), and a first panel is detachably installed on the operation opening. The first panel corresponds to the focusing structure (400) and is used to replace the focusing structure (400).

8. The laser processing head according to claim 7, characterized in that, The laser processing head also includes a back plate (600), and the operation opening is disposed on the side of the housing (100) away from the back plate (600). The housing (100) or the back plate (600) has a receiving cavity (610). The focusing structure (400) has a first position and a second position. When in the first position, the focusing structure (400) is disposed in the light output channel (110) and located between the collimating lens (300) and the focusing lens (500). When in the second position, the focusing structure (400) is located in the receiving cavity (610).

9. The laser processing head according to claim 2, characterized in that, Sealing plates are respectively provided on both sides of the lens tube (410) along the moving direction.

10. Laser processing equipment, characterized in that, It includes a laser and a laser processing head according to any one of claims 1-9, wherein the output head of the laser is connected to the laser processing head.

Images