Laser cutting device for cigarette strips

Abstract

The utility model provides a cigarette carton laser cutting device. The cigarette carton laser cutting device comprises a picosecond ultraviolet laser, a beam expander, a light path adjusting mechanism, a scanning galvanometer and a field lens, wherein the picosecond ultraviolet laser is used for emitting a laser beam; the beam expander is used for adjusting the diameter and divergence angle of the laser beam; the light path adjusting mechanism comprises a plurality of reflection lenses which are sequentially arranged in the direction of the output light path and telescopic light guide pipes which are sequentially connected among the reflection lenses, the telescopic light guide pipes are connected between the two reflection lenses in a length-adjustable mode, and the reflection lens located at the tail end in the direction of the output light path is connected with the scanning galvanometer through the telescopic light guide pipes; the cutting positions of the laser beams emitted by the field lens are adjusted in the X-axis direction, the Y-axis direction and the Z-axis direction in the three-dimensional space. The cigarette bar laser cutting device has the remarkable advantages of being high in cutting precision, convenient and fast to adjust, good in dynamic cutting effect, compact in structure, easy to maintain and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco rod cutting, in particular to a tobacco rod laser cutting device. Background Art

[0002] At present, in the tobacco industry, tobacco rods are cut by mechanical cutter discs. Although this method can meet the production requirements, it still has many shortcomings.

[0003] Existing mechanical disc cutting systems are plagued by complex mechanical structures and energy consumption. First, the production process generates significant vibration, noise, and debris, causing minor environmental pollution on-site. Second, the commonly used consumables are blades with a thickness of 0.15 to 0.20 mm, which need to be replaced every 8 hours during each shift, taking 3 to 5 minutes. This high maintenance frequency increases maintenance costs and reduces production capacity and utilization. Utility Model Content

[0004] In view of the above, the present invention provides a tobacco rod laser cutting device, which can improve cutting accuracy and cutting efficiency, and has the advantages of low energy consumption, low noise, and less debris.

[0005] The technical solution of this utility model:

[0006] The utility model provides a tobacco rod laser cutting device, comprising a picosecond ultraviolet laser for emitting a laser beam, a beam expander for adjusting the diameter and divergence angle of the laser beam, an optical path adjustment mechanism, a scanning galvanometer for positioning and scanning, and a field mirror for improving the collimation of the laser beam, which are sequentially arranged along the output optical path; the optical path adjustment mechanism comprises a plurality of reflective lenses sequentially arranged along the output optical path, and a telescopic light guide sequentially connected between the plurality of reflective lenses, the telescopic light guide being connected between two reflective lenses in an adjustable length, and the reflective lens located at the very end in the output optical path being connected to the scanning galvanometer via the telescopic light guide, so as to adjust the cutting position of the laser beam emitted by the field mirror along the X-axis, Y-axis, and Z-axis directions in three-dimensional space.

[0007] Furthermore, there are five reflecting lenses, namely the first reflecting lens, the second reflecting lens, the third reflecting lens, the fourth reflecting lens and the fifth reflecting lens, which are arranged in sequence along the output light path direction; the first reflecting lens is arranged at the emission end of the beam expander, and the second reflecting lens is arranged directly below the first reflecting lens, so that the telescopic light guide connected between the first reflecting lens and the second reflecting lens is arranged perpendicular to the horizontal plane; the third reflecting lens and the second reflecting lens are arranged horizontally, so that the telescopic light guide connected between the third reflecting lens and the second reflecting lens is arranged horizontally; the fourth reflecting lens and the third reflecting lens are arranged horizontally, so that the telescopic light guide between the fourth reflecting lens and the third reflecting lens is perpendicular to the telescopic light guide between the third reflecting lens and the second reflecting lens; the fifth reflecting lens is arranged directly below the fourth reflecting lens, so that the telescopic light guide connected between the fifth reflecting lens and the fourth reflecting lens is arranged perpendicular to the horizontal plane; a telescopic light guide is horizontally connected between the fifth reflecting lens and the scanning galvanometer.

[0008] Furthermore, the telescopic light guide between the third reflective lens and the second reflective lens is provided with a first fixing bracket.

[0009] Furthermore, the telescopic light guide between the fifth reflective lens and the fourth reflective lens is provided with a second fixing bracket.

[0010] Furthermore, the reflective lens includes a mirror housing and a reflective lens mounted on the mirror housing, the reflective lens is arranged at a 45-degree angle, and the mirror housing is provided with an incident port and an exit port for the laser beam to pass through.

[0011] Furthermore, both ends of the telescopic light guide are connected to the corresponding incident port and exit port respectively.

[0012] Furthermore, the telescopic light guide includes a first light guide and a second light guide slidably connected to the first light guide.

[0013] Furthermore, a sealing ring is connected between the first light guide pipe and the second light guide pipe.

[0014] Furthermore, the scanning galvanometer includes a first reflector, a first motor for driving the first reflector to swing, a second reflector, and a second motor for driving the second reflector to swing. The first reflector and the second reflector are driven to swing by the first motor and the second motor respectively, so as to change the reflection angle to control the moving position of the laser beam.

[0015] Furthermore, a visual camera for calibration and positioning is installed at one end of the telescopic light guide tube close to the scanning galvanometer.

[0016] Compared with traditional cutting methods, the tobacco rod laser cutting device provided by this utility model has significant beneficial effects:

[0017] 1. High cutting precision: The laser beam emitted by the picosecond UV laser, combined with the adjustment of the laser beam diameter and divergence angle by the beam expander, and the improvement of the laser beam collimation by the field lens, enables the laser beam to be focused on the tobacco rod with extremely high precision, thereby achieving precise cutting. At the same time, the positioning and scanning functions of the scanning galvanometer further ensure the accuracy of the cutting position and the flatness of the cut end face. Picosecond UV lasers can directly destroy the chemical bonds connecting the atomic components of a substance. This method, known as cold processing, does not produce a thermal effect, but directly separates the substance into atoms, which can replace traditional mechanical cutting methods. The tobacco rod cutting completed by this new laser cutting technology has a small kerf, a flat cross-section, no bevels, and no burrs.

[0018] 2. Easy adjustment: The design of multiple reflective lenses and adjustable-length telescopic light guides in the optical path adjustment mechanism allows the laser beam to be adjusted along the X-axis, Y-axis, and Z-axis in three-dimensional space, thereby adapting to cutting requirements at different positions and angles, and is easy to upgrade and transform on existing cutting equipment.

[0019] 3. Excellent dynamic cutting performance: This device is particularly suitable for cutting tobacco rods in motion. By precisely controlling the laser beam's emission and scanning path, it can achieve continuous and stable cutting of moving tobacco rods, and the cutting quality is not affected by the rod's movement speed. This feature makes this device have broad application prospects in industries such as tobacco processing.

[0020] 4. Compact structure and easy maintenance: The entire device is arranged in sequence along the output light path, with a compact structure and reasonable layout. The connections between the various components are stable and reliable, and easy to disassemble and repair.

[0021] 5. Energy saving and environmental protection: As a new way of cutting tobacco rods, laser tobacco rod cutting has multiple advantages such as no dust, no noise, low energy consumption, low loss, high yield, no consumables, intelligent manufacturing, and continuous production.

[0022] In summary, the tobacco rod laser cutting device provided by the utility model has significant beneficial effects such as high cutting accuracy, convenient adjustment, good dynamic cutting effect, compact structure, and easy maintenance, providing a new solution for cutting operations in industries such as tobacco processing.

[0023] The preferred embodiments of the present invention and their beneficial effects will be further described in detail in conjunction with specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but should not be construed as limiting the present invention. In the accompanying drawings:

[0025] Figure 1 This is a three-dimensional diagram of the tobacco rod laser cutting device of the present invention;

[0026] Figure 2 This is a front view of the tobacco rod laser cutting device of the utility model;

[0027] Figure 3 This is a structural diagram of the optical path adjustment mechanism of the tobacco rod laser cutting device of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the tobacco rod laser cutting device of the utility model;

[0029] Figure 5 A three-dimensional diagram of the reflective lens of the tobacco rod laser cutting device of the present invention;

[0030] Figure 6 This is a cross-sectional view of the reflective lens of the tobacco rod laser cutting device of the present invention;

[0031] Figure 7 A three-dimensional diagram of the telescopic light guide of the tobacco rod laser cutting device of the present invention;

[0032] Figure 8 This is a cross-sectional view of the telescopic light guide of the tobacco rod laser cutting device of the present invention;

[0033] Figure 9 This is a schematic structural diagram of the scanning galvanometer of the tobacco rod laser cutting device of the present invention.

[0034] Description of the accompanying drawings: picosecond ultraviolet laser 1, beam expander 2, optical path adjustment mechanism 3, scanning galvanometer 4, field mirror 5, reflecting lens 31, telescopic light guide 32, first fixed bracket 33, second fixed bracket 34, third fixed bracket 35, mirror housing 311, reflecting lens 312, incident port 313, exit port 314, first light guide 321, second light guide 322, first reflector 41, first motor 42, second reflector 43, second motor 44, visual camera 6, control center 7, fixing plate 8. DETAILED DESCRIPTION

[0035] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0036] See also Figures 1 to 3The utility model provides a tobacco rod laser cutting device, comprising a picosecond ultraviolet laser 1, a beam expander 2, an optical path adjustment mechanism 3, a scanning galvanometer 4, and a field lens 5 arranged in sequence along the output optical path. The picosecond ultraviolet laser 1 is used to emit a laser beam. The beam expander is used to adjust the diameter and divergence angle of the laser beam. The optical path adjustment mechanism 3 comprises a plurality of reflective lenses 31 arranged in sequence along the output optical path, and a telescopic light pipe 32 connected in sequence between the plurality of reflective lenses 31. The telescopic light pipe 32 is connected between two reflective lenses 31 in an adjustable length. The reflective lens 31 located at the end of the output optical path is connected to the scanning galvanometer 4 via the telescopic light pipe 32, so as to adjust the cutting position of the laser beam emitted by the field lens 5 in three-dimensional space along the X-axis (front-back direction), the Y-axis (left-right direction), and the Z-axis (up-down direction). The scanning galvanometer 4 is used for positioning and scanning. The field lens 5 is used to improve the collimation of the laser beam, making it a parallel beam for focusing and cutting.

[0037] Compared with traditional cutting methods, the tobacco rod laser cutting device provided by this utility model has significant beneficial effects:

[0038] 1. High cutting precision: The laser beam emitted by the picosecond UV laser 1, combined with the adjustment of the laser beam diameter and divergence angle by the beam expander 2, and the improvement of the laser beam collimation by the field lens 5, enables the laser beam to be focused on the tobacco rod with extremely high precision, thereby achieving precise cutting. At the same time, the positioning and scanning functions of the scanning galvanometer 4 further ensure the accuracy of the cutting position and the flatness of the cut end face. Picosecond UV lasers can directly destroy the chemical bonds connecting the atomic components of a substance. This method, known as cold processing, does not produce a thermal effect, but directly separates the substance into atoms, which can replace traditional mechanical cutting methods. The tobacco rod cutting completed by this new laser cutting technology has a small kerf, a flat cross-section, no bevels, and no burrs.

[0039] 2. Easy adjustment: The design of multiple reflective lenses and adjustable-length telescopic light guides in the optical path adjustment mechanism allows the laser beam to be adjusted along the X-axis, Y-axis, and Z-axis in three-dimensional space, thereby adapting to cutting requirements at different positions and angles, and is easy to upgrade and transform on existing cutting equipment.

[0040] 3. Excellent dynamic cutting performance: This device is particularly suitable for cutting tobacco rods in motion. By precisely controlling the laser beam's emission and scanning path, it can achieve continuous and stable cutting of moving tobacco rods, and the cutting quality is not affected by the rod's movement speed. This feature makes this device have broad application prospects in industries such as tobacco processing.

[0041] 4. Compact structure and easy maintenance: The entire device is arranged in sequence along the output light path, with a compact structure and reasonable layout. The connections between the various components are stable and reliable, and easy to disassemble and repair.

[0042] 5. Energy saving and environmental protection: As a new way of cutting tobacco rods, laser tobacco rod cutting has multiple advantages such as no dust, no noise, low energy consumption, low loss, high yield, no consumables, intelligent manufacturing, and continuous production.

[0043] In summary, the tobacco rod laser cutting device provided by the utility model has significant beneficial effects such as high cutting accuracy, convenient adjustment, good dynamic cutting effect, compact structure, and easy maintenance, providing a new solution for cutting operations in industries such as tobacco processing.

[0044] In this embodiment, five reflective lenses 31 are provided: a first reflective lens, a second reflective lens, a third reflective lens, a fourth reflective lens, and a fifth reflective lens, arranged sequentially along the output light path. The first reflective lens is positioned at the output end of the beam expander 2, and the second reflective lens is positioned directly below the first reflective lens, such that the telescopic light pipe 32 connecting the first and second reflective lenses is arranged perpendicular to the horizontal plane. The third reflective lens is positioned horizontally with the second reflective lens, such that the telescopic light pipe 32 connecting the third and second reflective lenses is arranged horizontally. The fourth reflective lens is positioned horizontally with the third reflective lens, such that the telescopic light pipe 32 connecting the fourth and third reflective lenses is perpendicular to the telescopic light pipe 32 connecting the third and second reflective lenses. The telescopic light pipe 32 between the fourth and third reflective lenses can be telescopic or fixed. The fifth reflective lens is positioned directly below the fourth reflective lens, such that the telescopic light pipe 32 connecting the fifth and fourth reflective lenses is arranged perpendicular to the horizontal plane. A telescopic light pipe 32 is horizontally connected between the fifth reflective lens and the scanning galvanometer 4.

[0045] The telescopic light pipe 32 between the third and second reflective lenses is provided with a first fixing bracket 33, and the telescopic light pipe 32 between the fifth and fourth reflective lenses is provided with a second fixing bracket 34. The telescopic light pipe 32 horizontally connected between the fifth reflective lens and the scanning galvanometer 4 is provided with a third fixing bracket 35.

[0046] By installing five reflective lenses and connecting them with vertical and horizontal telescopic light guides, the laser beam can be adjusted at multiple angles and positions within three dimensions. This design not only increases the flexibility of optical path adjustment but also enables the laser beam to precisely reach the designated cutting position, meeting diverse cutting requirements.

[0047] The rational layout of the reflective lens and the precise connection of the telescopic light guide effectively reduce the energy loss of the laser beam during transmission and improve the efficiency of the optical transmission path. This helps to ensure that the laser beam has sufficient energy density when it reaches the cutting position, thus achieving high-quality cutting results.

[0048] The carefully designed connection between the reflective lens and the telescopic light guide enhances the structural stability of the entire device, ensuring stable laser beam transmission and precise cutting even in complex working environments, thereby improving the reliability and durability of the device.

[0049] The angle of the laser beam emitted by the field lens 5 is changed accordingly according to the cutting speed to make the cross section smooth.

[0050] In this embodiment, the reflective lens 31 includes a housing 311 and a reflective lens 312 mounted on the housing 311. The reflective lens 312 is arranged at a 45-degree angle. The housing 311 is provided with an inlet 313 and an outlet 314 for the laser beam to pass through. The ends of the telescopic light pipe 32 are connected to the corresponding inlet 313 and outlet 314, respectively.

[0051] In this embodiment, the telescopic light guide 32 includes a first light guide 321 and a second light guide 322 slidably connected to the first light guide 321. A sealing ring is connected between the first light guide 321 and the second light guide 322. Both the first light guide 321 and the second light guide 322 are made of stainless steel tubes.

[0052] In this embodiment, the scanning galvanometer 4 includes a first reflector 41, a first motor 42 for driving the first reflector 41 to oscillate, a second reflector 43, and a second motor 44 for driving the second reflector 43 to oscillate. The first motor 42 and the second motor 44 respectively drive the first reflector 41 and the second reflector 43 to oscillate, thereby changing the reflection angle to precisely control the movement position of the laser beam, achieving high-precision positioning and rapid scanning, with a maximum processing speed of 5000 mm per second.

[0053] In this embodiment, a visual camera 6 for calibration and positioning is installed at one end of the telescopic light guide 32 close to the scanning galvanometer 4 .

[0054] The tobacco rod laser cutting device of the present invention further comprises a control center 7 for the laser cutting working state.

[0055] The tobacco rod laser cutting device of the present invention further comprises a fixing plate 8 mounted on the bottom of the picosecond ultraviolet laser 1 , and a beam expander 2 and a first reflective lens are mounted on one end of the fixing plate 8 .

[0056] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying importance. The terms "bottom" and "top," as well as "inner" and "outer," refer to directions toward or away from a specific component, respectively.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tobacco rod laser cutting device, characterized in that: The invention comprises a picosecond ultraviolet laser (1) for emitting a laser beam, which is sequentially arranged along an output light path, a beam expander (2) for adjusting the diameter and divergence angle of the laser beam, an optical path adjustment mechanism (3), a scanning galvanometer (4) for positioning and scanning, and a field lens (5) for improving the collimation of the laser beam; the optical path adjustment mechanism (3) comprises a plurality of reflective lenses (31) sequentially arranged along the output light path, and a telescopic light pipe (32) sequentially connected between the plurality of reflective lenses (31); the telescopic light pipe (32) is connected between two reflective lenses (31) in an adjustable length; the reflective lens (31) located at the end of the output light path is connected to the scanning galvanometer (4) via the telescopic light pipe (32), so as to adjust the cutting position of the laser beam emitted by the field lens (5) along the X-axis, Y-axis, and Z-axis directions in three-dimensional space.

2. The tobacco rod laser cutting device according to claim 1, characterized in that: The reflective lenses (31) are provided with five, namely a first reflective lens, a second reflective lens, a third reflective lens, a fourth reflective lens, and a fifth reflective lens, which are arranged in sequence along the output light path direction; the first reflective lens is provided at the emission end of the beam expander (2), and the second reflective lens is provided directly below the first reflective lens, so that the telescopic light guide (32) connected between the first reflective lens and the second reflective lens is arranged perpendicular to the horizontal plane; The third reflective lens and the second reflective lens are arranged horizontally, so that the telescopic light guide (32) connected between the third reflective lens and the second reflective lens is arranged horizontally; the fourth reflective lens and the third reflective lens are arranged horizontally, so that the telescopic light guide (32) between the fourth reflective lens and the third reflective lens is perpendicular to the telescopic light guide (32) between the third reflective lens and the second reflective lens; the fifth reflective lens is arranged directly below the fourth reflective lens, so that the telescopic light guide (32) connected between the fifth reflective lens and the fourth reflective lens is arranged perpendicular to the horizontal plane; and the telescopic light guide (32) is horizontally connected between the fifth reflective lens and the scanning galvanometer (4).

3. The tobacco rod laser cutting device according to claim 2, characterized in that: The telescopic light guide (32) between the third reflecting lens and the second reflecting lens is provided with a first fixing bracket (33).

4. The tobacco rod laser cutting device according to claim 3, characterized in that: The telescopic light guide tube (32) between the fifth reflecting lens and the fourth reflecting lens is provided with a second fixing bracket (34).

5. The tobacco rod laser cutting device according to claim 1, characterized in that: The reflective lens (31) comprises a mirror housing (311) and a reflective lens (312) mounted on the mirror housing (311). The reflective lens (312) is arranged at a 45-degree angle. The mirror housing (311) is provided with an incident port (313) and an exit port (314) for the laser beam to pass through.

6. The tobacco rod laser cutting device according to claim 5, characterized in that: The two ends of the telescopic light guide tube (32) are respectively connected to the corresponding incident port (313) and the exit port (314).

7. The tobacco rod laser cutting device according to claim 1, characterized in that: The telescopic light guide tube (32) comprises a first light guide tube (321) and a second light guide tube (322) slidably connected to the first light guide tube (321).

8. The tobacco rod laser cutting device according to claim 7, characterized in that: A sealing ring is connected between the first light guide tube (321) and the second light guide tube (322).

9. The tobacco rod laser cutting device according to claim 1, characterized in that: The scanning galvanometer (4) comprises a first reflecting mirror (41), a first motor (42) for driving the first reflecting mirror (41) to swing, a second reflecting mirror (43), and a second motor (44) for driving the second reflecting mirror (43) to swing. The first reflecting mirror (41) and the second reflecting mirror (43) are driven to swing by the first motor (42) and the second motor (44) respectively, so as to change the reflection angle and thereby control the moving position of the laser beam.

10. The tobacco rod laser cutting device according to claim 1, characterized in that: A visual camera (6) for calibration and positioning is installed at one end of the telescopic light guide (32) close to the scanning galvanometer (4).

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