Rod-shaped object laser drilling device

Abstract

The invention provides a rod-shaped object laser drilling device which comprises a wheel body, a laser drilling device and a laser drilling device. A polygon prism and a plurality of suction claw gear shafts are arranged on the wheel body, and the suction claw gear shafts are evenly distributed in the circumferential direction of the wheel body at intervals. The suction claw gear shaft is rotatably arranged in the wheel body, a through first negative pressure channel is formed in the suction claw gear shaft, and one end of the first negative pressure channel is communicated with a suction claw; the transmission mechanism is in transmission connection with a first driving source, the wheel body and the multiple suction claw gear shafts; a through laser channel is formed in the hollow shaft, and the hollow shaft is driven by a second driving source to rotate; the scanning lens is located on the inner sides of the multiple suction claws, and at least one lens group is arranged in the scanning lens; the beneficial effects of the invention are that: the polygon prism with the rotation axis coinciding with the rotation axis of the wheel body is arranged in the wheel body, and the lens group is arranged in the scanning lens, so that directional emission and focusing of laser beams are realized, the equipment structure is simplified, and the manufacturing and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco processing, and in particular to a laser punching device for a rod-shaped object. Background Art

[0002] Online laser punching of cigarettes refers to the process of using laser beams to punch tiny holes in the middle of the cigarette filter during the cigarette rolling process. These holes allow smokers to inhale a certain amount of ambient air while inhaling tobacco smoke, which can dilute the smoke on the one hand and reduce the temperature of the smoke on the other hand, thereby reducing the nicotine and tar content in the smoke. In addition, online laser punching can also improve the problem of large inhalation resistance of slim and medium cigarettes.

[0003] The Chinese invention patent application with publication number CN113996935A discloses an online laser punching device and punching method for rod-shaped articles. The application uses the protrusions on the rubbing rollers arranged on the outside of the receiving drum to rotate the cigarette around its longitudinal axis. While the cigarette is rotating, the laser head arranged on the upper side between the receiving drum and the rubbing rollers aims at the filter end of the cigarette and emits laser pulses. Since the minimum distance between the roller surface of the rubbing roller and the roller surface of the receiving drum is slightly smaller than the diameter of the cigarette, this will cause squeezing of the cigarette. At the same time, the high-speed rotation of the cigarette will cause defects such as loose cigarettes and punctures on the surface of the cigarette.

[0004] The Chinese invention patent application with the publication number CN1653976A discloses a device that attempts to avoid the above-mentioned loss, in which cigarettes are arranged in grooves on the outer circumference of a cylindrical drum. When the drum rotates, the self-rotating grooves drive the cigarettes to rotate together through negative pressure suction. A prism is arranged outside the axial direction of the drum, and the prism can rotate independently relative to the drum; a laser beam mechanism is arranged in a direction perpendicular to the axis of the prism, and the laser beam is focused on a line that basically passes through the rotation center of the prism through a lens arranged in front. The prism rotates opposite to the rotation direction of the drum, and is used to direct the laser beam outward from the rotation axis, and is used to swing the laser beam around the rotation axis. A group of first deflection mirrors and a group of second deflection mirrors are arranged outside the circumference of the drum to turn the laser beam reflected by the prism to point perpendicular to the rotation axis of the drum, that is, to the filter end of the cigarette in the groove of the drum, and a group of lenses are arranged near the circumference of the drum to focus the laser beam reflected by the second deflection mirror to the filter end of the cigarette. The rotation of the drum, the self-rotation of the cigarette in the groove of the drum, the rotation of the prism and the emission frequency of the laser beam must be coordinated to ensure that the cigarette can be punched by the laser beam when passing under each lens. However, the device has 5 sets of deflection mirrors and lenses within the 90° angle range. The overall size of the device is large, the effective working range is narrow, and the self-rotation speed of the cigarette in the groove is relatively high, which is not conducive to the stable operation of the machine. Summary of the invention

[0005] The object of the present invention is to provide a rod-shaped object laser drilling device, which has a relatively simplified device structure under the premise of completing the laser drilling without damaging the cigarette.

[0006] The present invention provides a rod-shaped object laser punching device, comprising: a wheel body, on which a polygonal mirror and a plurality of suction claw gear shafts evenly spaced and distributed along the circumference of the wheel body are arranged, the polygonal mirror is coaxially arranged with the wheel body, and comprises a plurality of mirror surfaces evenly distributed along the circumference, and the number of the mirror surfaces is the same as the number of the suction claw gear shafts; the suction claw gear shaft is rotatably arranged in the wheel body, wherein a first negative pressure channel is provided therethrough, and one end of the first negative pressure channel is connected to a suction claw for adsorbing cigarettes; a transmission mechanism, which is respectively connected to a first driving source, the wheel body, and the plurality of suction claw gear shafts in a transmission manner , which drives the wheel body and the suction claw gear shaft to rotate around their respective axes under the drive of the first driving source; a hollow shaft, which is coaxially arranged with the wheel body and penetrates the wheel body, a through laser channel is provided in the hollow shaft, and rotates around its own axis under the drive of the second driving source; a scanning lens, which is coaxially arranged with the wheel body and fixed at one end of the hollow shaft, the scanning lens is located on the inner side of the multiple suction claws, and at least one lens group is provided therein; the laser beam is projected onto the cigarette facing the mirror surface through the laser channel, the lens group, and a mirror surface of the multi-prism, and the cigarette is punched.

[0007] Preferably, it also includes a fixed position fixing mechanism, on which a plurality of second negative pressure channels evenly spaced along an arc line are provided, and the second negative pressure channels are used to connect the negative pressure extraction mechanism with the first negative pressure channel.

[0008] Preferably, the transmission mechanism includes a wheel driving gear, an internal gear fixedly connected to the wheel driving gear, and a driving gear shaft, the wheel driving gear is drivingly connected to the first driving source, one end of the driving gear shaft is provided with a first gear drivingly connected to the internal gear, and the other end is provided with a second gear and a third gear, the second gear is drivingly connected to the wheel body for driving the wheel body to rotate around its own axis; the third gear is drivingly connected to multiple suction claw gear shafts for driving each suction claw gear shaft to rotate around its own axis.

[0009] Preferably, the scanning lens is provided with a beam splitter, a central reflector and two lens groups, the beam splitter and the central reflector are coaxially arranged with the wheel body, and the two lens groups are distributed at intervals along the circumference of the scanning lens.

[0010] Preferably, the lens group includes a reflector and a condenser.

[0011] Preferably, the scanning lens is provided with a plurality of openings for the laser beam to pass through, and the number of the openings is the same as the number of the lens groups.

[0012] Preferably, the extension direction of the suction claw is parallel to the axial direction of the wheel body.

[0013] Preferably, the first driving source and the second driving source are both servo motors.

[0014] Preferably, the scanning lens and the wheel body rotate in opposite directions.

[0015] Preferably, the rod-shaped object laser drilling device is arranged between the conveying wheel and the output wheel.

[0016] The present invention is beneficial in that:

[0017] 1. Simplify the structure and reduce the cost: The present invention realizes the directional emission and focusing of the laser beam by arranging a prism whose rotation axis coincides with the rotation axis of the wheel body in the wheel body and arranging a lens group in the scanning lens, thereby simplifying the equipment structure and reducing the manufacturing and maintenance costs.

[0018] 2. Improve the appearance quality of cigarettes: The present invention arranges as many suction claws as possible on the wheel body, each of which can absorb the cigarette to achieve self-rotation. Laser drilling is performed during the rotation of the cigarette. The drilling process does not squeeze or rub the cigarette, thereby improving the appearance quality of the cigarette.

[0019] 3. Quickly change the diameter of cigarettes: The present invention can adapt to cigarettes of different diameters by replacing suction claws of different diameters and simply adjusting the focal length. The process is simple and convenient, and no mechanical adjustment is required after the replacement is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a rod-shaped object laser drilling device according to the present invention;

[0021] Figure 2 It is an exploded schematic diagram of the wheel body and the scanning lens;

[0022] Figure 3 It is a cross-sectional view of the rod-shaped object laser drilling device of the present invention;

[0023] Figure 4 Schematic diagram of the laser light path of the rod-shaped object laser drilling device of the present invention;

[0024] Figure 5 It is a schematic diagram of the cooperation between the wheel body, the conveying wheel and the output wheel;

[0025] Component number description:

[0026] 1 Hollow shaft

[0027] 2 Scanning lens

[0028] 3 Wheel drive gear

[0029] 31 Internal gear

[0030] 4 wheel body

[0031] 5 Suction claws

[0032] 6 Transmission mechanism

[0033] 61 First Gear

[0034] 62 Drive gear shaft

[0035] 63 Second gear

[0036] 64 Third gear

[0037] 65 Transmission gear

[0038] 7 Flange seat

[0039] 71 Second negative pressure channel

[0040] 8 Lens Group

[0041] 81 Reflector

[0042] 82 Condenser

[0043] 83 Opening

[0044] 9 Beam splitter

[0045] 10 Center reflector

[0046] 11 Prism

[0047] 12 Suction claw gear shaft

[0048] 13 Laser Beam

[0049] 14 cigarettes

[0050] 15 Conveyor wheel

[0051] 16 Output wheel DETAILED DESCRIPTION

[0052] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0053] In the description of the present invention, it should be noted that the terms "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0056] Figure 3 FIG. 1 is a cross-sectional view of a rod-shaped object laser drilling device according to the present invention. In the following description, Figure 3 The attached figure in the figure is used as a reference for the direction. Figure 3 In the figure, the right direction is toward the right along the drawing plane, and the left direction is toward the left along the drawing plane. The axis of the wheel body 4 is defined to extend along the left-right direction.

[0057] like Figure 1-4 As shown, the present invention provides a rod-shaped object laser drilling device, which includes a wheel body 4, a fixing mechanism 7, a transmission mechanism 6, a hollow shaft 1 and a scanning lens 2.

[0058] A multi-prism 11 and a plurality of suction claw gear shafts 12 evenly spaced and distributed along the circumference of the wheel body 4 are provided on the wheel body 4. The multi-prism 11 is coaxially arranged with the wheel body 4 and fixedly mounted at one end of the wheel body 4. It includes a plurality of mirrors evenly distributed along the circumference. The shapes, sizes and inclination angles of the plurality of mirrors are the same and can rotate around the axis of the wheel body 4. At the same time, the number of mirrors is the same as the number of suction claw gear shafts 12. The suction claw gear shafts 12 are rotatably arranged in the wheel body 4. The axis of each suction claw gear shaft 12 is parallel to the axis of the wheel body 4, and both extend in the left-right direction. A first negative pressure channel that runs through the left and right is provided in each suction claw gear shaft 12, and the right end of the first negative pressure channel is connected to a suction claw 5 for adsorbing cigarettes 14. The extension direction of the suction claw 5 is parallel to the axis of the wheel body 4, and a hollow negative pressure cavity is provided inside it, and a plurality of suction holes connected to the negative pressure cavity are opened on its outer wall.

[0059] The fixing mechanism 7 is fixed in position, and is coaxially arranged with the wheel body 4 and located at the left end of the wheel body 4. The fixing mechanism 7 is provided with a plurality of second negative pressure channels 71 evenly spaced along the arc line, and the second negative pressure channels 71 are used to connect the negative pressure extraction mechanism with the first negative pressure channel. When the negative pressure extraction mechanism is working, negative pressure can be formed at the suction holes of the suction claws 5 connected to the second negative pressure channels 71, and the cigarette 14 is adsorbed on the suction claws 5.

[0060] like Figure 3 As shown, the transmission mechanism 6 is respectively connected to the first driving source, the wheel body 4, and a plurality of suction claw gear shafts 12. Under the drive of the first driving source, the transmission mechanism 6 drives the wheel body 4 and the suction claw gear shafts 12 to rotate around their respective axes, that is, each suction claw gear shaft 12 will rotate around its own axis while revolving around the axis of the wheel body 4 with the wheel body 4.

[0061] In a specific embodiment of the present invention, the transmission mechanism 6 includes a wheel driving gear 3, an internal gear 31 fixedly connected to the wheel driving gear 3, and a driving gear shaft 62. The wheel driving gear 3 is rotatably sleeved on the outer side of the fixing mechanism 7, and is transmission-connected to the first driving source and rotates under the drive of the first driving source. The driving gear shaft 62 runs through the fixing mechanism 7, and a first gear 61 transmission-connected to the internal gear 31 is provided at the left end thereof, and a second gear 63 and a third gear 64 are provided at the right end from left to right in sequence, the second gear 63 is transmission-connected to the fourth gear arranged on the inner wall of the wheel body 4, and is used to drive the wheel body 4 to rotate around its own axis; the third gear 64 is transmission-connected to a plurality of suction claw gear shafts 12 through a transmission gear 65 rotatably arranged in the wheel body 4, and is used to drive each suction claw gear shaft 12 to rotate around its own axis. Those skilled in the art can change the number of teeth on the wheel driving gear 3, the internal gear 31, the first gear 61, the second gear 63, the third gear 64, the fourth gear, the transmission gear 65 and the suction claw gear shaft 12 as needed, and then change the rotation speed of the wheel body 4 and the rotation speed of the suction claw gear shaft 12 so that the two rotation speeds are different.

[0062] The hollow shaft 1 is coaxially arranged with the wheel body 4 and penetrates the fixing mechanism 7 and the wheel body 4 at the same time. A laser channel is provided in the hollow shaft 1 which passes through the left and right sides, and the hollow shaft 1 rotates around its own axis under the drive of the second driving source. The first driving source and the second driving source are both servo motors.

[0063] The scanning lens 2 is coaxially arranged with the wheel body 4 and fixed at the right end of the hollow shaft 1. The scanning lens 2 is located inside the plurality of suction claws 5, and is provided with an optical component and at least one lens group 8. The lens group 8 specifically includes a reflector 81 and a condenser 82. The scanning lens 2 is also provided with a plurality of openings 83 for the laser beam 13 to pass through. The number of the openings 83 is the same as the number of the lens group 8, and the opening positions thereof correspond one to one with the positions where the lens group 8 is provided.

[0064] In the first embodiment of the present invention, a lens group 8 is provided in the scanning lens 2, and the optical component includes a central reflector 10, which is coaxially arranged with the wheel body 4. When laser drilling is performed, the laser beam 13 passes through the laser channel to reach the central reflector 10, and the central reflector 10 reflects the laser beam 13 to the reflector 81. The laser beam 13 reflected by the reflector 81 is focused by the condenser 82 and then emitted to a mirror surface in the prism 11. The laser beam 13 reflected by the mirror surface is emitted from the opening 83 and emitted to the cigarette 14 facing the opening 83, and a hole is formed on the filter end of the cigarette 14.

[0065] In the second embodiment of the present invention, two lens groups 8 are provided in the scanning lens 2, and the optical components include a beam splitter 9 and a central reflector 1. The beam splitter 9 and the central reflector 10 are coaxially arranged with the wheel body 4, and the two lens groups 8 are spaced apart along the circumference of the scanning lens 2. When laser drilling is performed, Figure 4 As shown, the laser beam 13 passes through the laser channel to reach the beam splitter 9, the beam splitter 9 reflects 50% of the laser light to the reflector 81 of one of the lens groups 8, and the other 50% of the laser beam 13 passes through the beam splitter 9 and is emitted to the central reflector 10 located on the right side of the beam splitter 9, the central reflector 10 reflects the laser beam 13 to the reflector 81 of the other lens group 8, the laser beams 13 reflected by the reflectors 81 of the two lens groups 8 are focused by the condenser 82 in the lens group and are respectively emitted to the two mirror surfaces in the prism 11, and then are respectively emitted from the two openings 83, and a hole is opened on each of the filter ends of the two cigarettes 14 opposite to the two openings 83.

[0066] Specifically, the scanning lens 2 and the wheel body 4 rotate in opposite directions, and the rotation speed is greater than the rotation speed of the wheel body 4. The focal length of the condenser 82 is approximately equal to the sum of the distance from the condenser 82 to the mirror surface and the distance from the mirror surface to the filter end of the cigarette 14. The mirror surface is perpendicular to the plane formed by the axis of the suction claw 5 and the axis of the wheel body 4.

[0067] The following combination Figure 4 and Figure 5 The working principle of the rod-shaped object laser drilling device of the present invention is described as follows:

[0068] The rod-shaped object laser punching device of the present invention is arranged between the conveying wheel 15 and the output wheel 16. The conveying wheel 15 and the output wheel 16 are both provided with a plurality of suction grooves evenly spaced along their own circumferences, which are used to adsorb the cigarettes 14. The conveying wheel 15 and the output wheel 16 have the same rotation direction, and the wheel body 4 rotates in the opposite direction to the conveying wheel 15 and the output wheel 16. The conveying wheel 15 is used to convey the cigarettes 14 to the suction claw 5, and the cigarettes 14 are adsorbed on the suction claw 5. The wheel body 4 drives each cigarette 14 to revolve θ degrees, and conveys the cigarettes 14 from the output wheel 15 to the suction groove of the output wheel 16, and the cigarettes 14 are separated from the wheel body 4. During the revolution of each cigarette 14, the cigarette 14 will also rotate N times with the suction claw 5 / suction claw gear shaft 12, and the scanning lens 2 will rotate n times, where n>N; at the same time, the laser set at one end of the laser channel emits a pulsed laser, and the laser beam 13 is projected onto the cigarette 14 facing the mirror surface through the laser channel, optical components, lens group 8, and the mirror surface of the multi-prism 11, completing a punching of the cigarette 14. Finally, multiple openings (i.e., a circle of openings) are formed on the cigarette 14 at intervals along the circumference of the cigarette 14, and the cigarette 14 with a circle of openings is transported to the output wheel 16.

[0069] To ensure the accuracy of punching, the initial relative positions of the scanning lens 2 and the wheel body 4 are aligned, and the rotation speed of the scanning lens 2, the rotation speed of the wheel body 4, the number of suction claws 5, and the number of mirror surfaces of the prism 11 are coordinated with each other. At the same time, with the appropriate laser emission frequency, the lens group 8 and the opening 83 of the scanning lens 2 can punch different circumferential sections of the same cigarette 14 each time they pass through the same cigarette 14, ensuring that the circumferential punching of the cigarette 14 is finally completed.

[0070] In a specific embodiment of the present invention, a plurality of second negative pressure channels 71 provided on the fixing mechanism 7 are spaced apart along an arc line with a central angle of not less than θ degrees. Such a configuration can ensure the stability of the negative pressure in the suction claw 5 that adsorbs the cigarette 14, thereby preventing the cigarette 14 from falling off during the revolution of the wheel body 4.

[0071] Furthermore, in order to achieve uniform perforation on the cigarette 14 , during the revolution of the cigarette 14 , the cigarette 14 rotates twice along with the suction claw 5 / suction claw gear shaft 12 .

[0072] Furthermore, in order to adjust different focal positions, adapt to cigarettes 14 of different diameters or realize holes of different sizes under the same laser power, a beam focus adjustment mechanism needs to be provided between the laser and the laser channel. The beam focus adjustment mechanism is an existing technology, which includes one or more of a beam expander, a filter, a lens, a reflector, and a beam splitter.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rod-shaped object laser drilling device, characterized in that: include: A wheel body, on which a multi-prism and a plurality of suction claw gear shafts evenly spaced and distributed along the circumference of the wheel body are provided, the multi-prism is coaxially arranged with the wheel body, and comprises a plurality of mirror surfaces evenly distributed along the circumference, the number of the mirror surfaces being the same as the number of the suction claw gear shafts; the suction claw gear shaft is rotatably arranged in the wheel body, a first negative pressure channel is provided therethrough, and one end of the first negative pressure channel is connected with a suction claw for adsorbing cigarettes; A transmission mechanism, which is respectively connected to the first driving source, the wheel body, and the plurality of suction claw gear shafts, and which drives the wheel body and the suction claw gear shafts to rotate around their respective axes under the drive of the first driving source; A hollow shaft, which is coaxially arranged with the wheel body and passes through the wheel body, wherein a laser channel is provided through the hollow shaft and the hollow shaft rotates around its own axis under the drive of a second driving source; A scanning lens, which is coaxially arranged with the wheel body and fixed to one end of the hollow shaft, the scanning lens is located inside the plurality of suction claws, and is provided with at least one lens group; The laser beam is projected onto the cigarette facing the mirror surface through the laser channel, the lens group, and a mirror surface of the prism, thereby punching a hole in the cigarette.

2. The rod-shaped object laser drilling device according to claim 1, characterized in that: It also includes a fixed position fixing mechanism, on which a plurality of second negative pressure channels evenly spaced along an arc line are provided, and the second negative pressure channels are used to connect the negative pressure extraction mechanism with the first negative pressure channel.

3. The rod-shaped object laser drilling device according to claim 1, characterized in that: The transmission mechanism includes a wheel driving gear, an internal gear fixedly connected to the wheel driving gear, and a driving gear shaft. The wheel driving gear is drivingly connected to a first driving source. One end of the driving gear shaft is provided with a first gear drivingly connected to the internal gear, and the other end is provided with a second gear and a third gear. The second gear is drivingly connected to the wheel body for driving the wheel body to rotate around its own axis; the third gear is drivingly connected to a plurality of suction claw gear shafts for driving each suction claw gear shaft to rotate around its own axis.

4. The rod-shaped object laser drilling device according to claim 1, characterized in that: The scanning lens is provided with a beam splitter, a central reflector and two lens groups. The beam splitter and the central reflector are coaxially arranged with the wheel body, and the two lens groups are distributed at intervals along the circumference of the scanning lens.

5. The rod-shaped object laser drilling device according to claim 1 or 4, characterized in that: The lens group includes a reflecting mirror and a condensing mirror.

6. The rod-shaped object laser drilling device according to claim 1, characterized in that: The scanning lens is also provided with a plurality of openings for the laser beam to pass through, and the number of the openings is the same as the number of the lens groups.

7. The rod-shaped object laser drilling device according to claim 1, characterized in that: The extending direction of the suction claw is parallel to the axial direction of the wheel body.

8. The rod-shaped object laser drilling device according to claim 1, characterized in that: The first driving source and the second driving source are both servo motors.

9. The rod-shaped object laser drilling device according to claim 1, characterized in that: The scanning lens and the wheel body rotate in opposite directions.

10. The rod-shaped object laser drilling device according to claim 1, characterized in that: The rod-shaped object laser punching device is arranged between the conveying wheel and the output wheel.

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