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CN-121972837-A - Multi-row hole punching device for improving light path

CN121972837ACN 121972837 ACN121972837 ACN 121972837ACN-121972837-A

Abstract

The invention discloses a driver torque configuration method of a multi-row hole laser perforation device, which comprises a drum-shaped wheel and a scanning unit driven by an independent driver, wherein the scanning unit is of a coaxial revolving body structure and comprises a hollow shaft, a forming optical assembly and a focusing optical assembly. The method comprises the steps of S1, matching a rotational inertia calculation formula according to the structure of each part, establishing a single part model, wherein the total inertia is the sum of all parts, limiting the size, the material and the rotational inertia threshold value of all parts at the same time, S2, determining the operation parameters such as the maximum rotating speed of a scanning unit 8000rpm, and the like, S3, calculating the inertia torque according to a rigid body rotation law based on the model and the parameters, and combining the friction torque, the transmission coefficient and the safety coefficient, so that the rated torque of a driver is less than or equal to 5.8Nm and the motor power is less than or equal to 5.5KW. The method realizes accurate configuration of the torque of the driver, adapts to the low-torque and low-power driver, improves the installation adaptability of the device, and reduces the energy consumption and the cost.

Inventors

  • MEI LIN
  • MEI XIAOYU
  • HU JUNYING
  • HAN MEILING
  • HAN YONG
  • CHEN MINGMING
  • LI XIAOTIAN
  • ZHANG HENG
  • YANG ZHIGANG

Assignees

  • 江苏瑞驰机电科技有限公司
  • 南京智晟达自动化科技有限公司
  • 梅笑雨

Dates

Publication Date
20260505
Application Date
20260317

Claims (13)

  1. 1. A driver torque configuration method for a multi-row hole laser perforation device comprising a drum wheel and a scanning unit driven by an independent driver, the scanning unit comprising a hollow shaft and an optical assembly mounted on the hollow shaft, the method comprising the steps of: s1, determining a rotational inertia calculation model according to the structural constitution of a scanning unit, wherein the scanning unit is a coaxial revolving body structure rotating around a central axis, and specifically comprises the following steps: The hollow shaft is coaxially arranged with the drum-shaped wheel and is a hollow cylindrical revolving body with the outer diameter smaller than 80mm and the wall thickness larger than 5mm, the axial length of the hollow shaft is smaller than 1550mm, and the hollow shaft is made of high-strength rigid materials; and the forming optical assembly and the focusing optical assembly are sequentially arranged along the central axis of the scanning unit, wherein: The forming optical component is internally arranged in the hollow shaft or at the end part of the hollow shaft and is a light rigid hollow cylindrical component provided with one or more optical lenses, and the moment of inertia of the forming optical component is not more than that of a rigid hollow cylindrical component with the radial external dimension of 76mm, the wall thickness of 12mm and the axial length of 200 mm; the focusing optical component is fixedly assembled at the front end of the hollow shaft or the front end of the forming optical component, is a light rigid hollow cylindrical component internally provided with a beam splitter, a reflector and two focusing mirrors, has an axial length of less than 200mm and a maximum radial diameter of 150mm, is made of light high-strength rigid materials, and has a moment of inertia not greater than that of a hollow cylindrical component with a radial external dimension of 150mm, a wall thickness of 22mm and an axial length of 200 mm; respectively establishing a rotational inertia calculation model of a single component aiming at the structural form matching corresponding rotational inertia calculation formulas of all the components, wherein the total rotational inertia of the scanning unit is the sum of the rotational inertia of all the components; S2, determining operation parameters of the scanning unit, wherein the maximum scanning rotating speed of the scanning unit is 8000rpm, the starting acceleration time is 6-25S, the friction torque is 10-25% of the inertia torque, the effective transmission coefficient of a transmission system is 0.85-0.95, and the safety coefficient of device operation is 1.3-2.0 times; and step S3, calculating inertia torque in the operation process of the scanning unit by adopting a rigid body rotation law based on the rotational inertia calculation model established in the step S1 and the operation parameters determined in the step S2, and calculating to obtain the rated torque of the driver for driving the scanning unit to rotate by combining the friction torque, the effective transmission coefficient and the safety coefficient allowance, so that the rated torque of the driver is not more than 5.8Nm, and the power of a corresponding driver motor is not more than 5.5KW.
  2. 2. An improved optical path multi-row hole laser perforation apparatus configured by the method of claim 1, comprising a drum wheel provided with a plurality of rotary suction nozzles in the circumferential direction, said rotary suction nozzles being adapted to suction and convey double length thin rods, further comprising: The hollow shaft is coaxially arranged at the center of the drum-shaped wheel, and is used for driving the scanning unit to rotate and transmitting an incident light beam along a central through hole of the scanning unit; The scanning unit comprises a forming optical assembly and a focusing optical assembly which are sequentially arranged along a central axis, wherein the forming optical assembly is used for receiving an incident light beam and forming the incident light beam into two or more output light beams distributed in a preset angle, and the focusing optical assembly is used for converging the formed output light beams at preset positions on the surface of the thin rod respectively; The device comprises a drum wheel, a first driver, a second driver, a scanning unit, a first driving device, a second driving device and a control device, wherein the drum wheel is used for driving the drum wheel and the rotary suction nozzle to synchronously rotate; The shaping optical component is arranged between a transmission path of an incident light beam and the focusing optical component and is used for shaping the incident light beam into at least two light beams which are distributed at an equal differential angle with a central axis or have multiple fan-shaped contracted light beams with approximately equal power, and the light beams are positioned in the same first plane; The focusing optical assembly comprises a beam splitter, a first focusing lens arranged on a reflection light path of the beam splitter, and a reflecting lens and a second focusing lens arranged on a transmission light path of the beam splitter, wherein the central line of the reflection light path and the central line of the transmission light path form a second plane; the focusing optic employs any one of three configurations: the beam reflected by the beam splitter is focused on the first side surface of the double-length slim rod through a first focusing lens to form a plurality of holes with the axial distance H; The second configuration is that after the light beam transmitted by the beam splitter is reflected by the reflector, the light beam is focused on the second side surface of the same double-length slim rod by the second focusing mirror to form a plurality of holes with the axial distance H; And thirdly, emitting the light beam transmitted by the beam splitter along the direction opposite to the direction of 180 degrees of the reflected light beam, wherein the focal length of the first focusing mirror is the same as that of the second focusing mirror.
  3. 3. The multi-row hole laser perforation apparatus according to claim 2, wherein the molding optical component is a DOE diffraction spectroscopic device.
  4. 4. The multi-row hole laser perforation device according to claim 2, wherein the molding optical assembly comprises a beam splitting assembly and a molding assembly which are sequentially arranged along a central axis; The beam splitting assembly is used for splitting an incident beam into two beams which are symmetrically distributed on two sides of a central axis, have approximately equal power and are parallel to the central axis, and the two beams are positioned in a first plane; The forming assembly comprises a wedge-shaped lens group formed by two wedge-shaped lenses symmetrically arranged on two sides of a central axis, each wedge-shaped lens group is provided with a preset wedge angle alpha, the wedge-shaped lens group is used for converting two parallel light beams from the beam splitting assembly into light beams which shrink towards the central axis and are distributed with the central axis in an angle of + -alpha, and after the light beams in the angle of + -alpha are focused by a focusing lens with a focal length F, two holes with a distance of H are formed at a focal plane.
  5. 5. The multi-row hole laser perforation apparatus according to claim 4, wherein the beam splitting assembly is selected from any one of the following structures: the DOE diffraction device is used for dividing an incident light beam into two parallel light beams symmetrically distributed on two sides of a central axis; the second structure is that the beam splitter I is combined with the first reflecting mirror group and is used for splitting an incident light beam into two light beams parallel to the central axis; And the third structure is that the beam splitter I, the first reflecting mirror group, the first wedge-shaped reflecting mirror group and the second wedge-shaped reflecting mirror group are combined and used for reducing the distance between two light beams from parallel light beams of the beam splitter I and the first reflecting mirror group and then transmitting the light beams.
  6. 6. The multi-row hole laser perforation device according to claim 1 or 2, wherein the first driver drives the drum wheel and the rotary suction nozzle arranged on the inner side of the drum wheel to rotate through a built-in transmission pair, and the second driver drives the hollow shaft to rotate through a special scanning transmission pair so as to drive the scanning unit to synchronously rotate around the central axis.
  7. 7. The multi-row hole laser perforation apparatus according to claim 2, wherein the first plane and the second plane are configured to synchronously rotate around the central axis under the drive of the hollow shaft, and an included angle between the first plane and the second plane is not more than + -5 degrees.
  8. 8. The multi-row hole laser perforation apparatus according to claim 2, wherein in the beam splitting assembly, a distance L1 between two light beams satisfies L1 not less than 3d/1.414, wherein d is an effective lens diameter of a beam splitting mirror or a reflecting mirror, d is not less than 1.2D, and D is an actual spot diameter of an incident light beam.
  9. 9. The multi-row hole laser perforation device of claim 8, wherein the distance L between the two light beams transformed by the wedge-shaped lens group is more than or equal to 2D, and D is the actual spot diameter of the incident light beam.
  10. 10. The multi-row hole laser perforation apparatus of claim 2, wherein the apparatus is configured to define a perforation work area between the slim rod input assembly and the output assembly of the drum, the perforation work area having an angle ranging from 120 DEG to 275 DEG, wherein the dual length slim rod is rotated at least one revolution by the rotary suction nozzle, and wherein the drive shaft is disposed outside the angle range of the perforation work area when the drive shaft is disposed inside the drum.
  11. 11. The multi-row hole laser perforation device as set forth in claim 4, wherein the distance H between two axially distributed holes is 0.2 mm-5 mm.
  12. 12. The multi-row hole laser perforation apparatus according to any one of claims 2 to 5, wherein the beam splitter is a beam splitter that is insensitive to the polarization state of the incident beam.
  13. 13. The multi-row hole laser perforation device according to claim 1 or 2, wherein the first driver is a servo driver which is independently arranged or is an integrated structure of a driving gear and a driving shaft which are matched with a cigarette making machine.

Description

Multi-row hole punching device for improving light path Technical Field The invention relates to a thin rod processing device, and also relates to an optical design and a processing method of the punching device, belonging to the technical field of laser processing devices. Background At present, a poking and rolling mechanism is generally adopted to drive a thin rod to realize 360-degree spinning, and pulse laser emitted by a fixed focusing head is matched to complete uniform perforation of the circumferential surface of the thin rod. However, in the processing mode, the hard contact and the poking action of the poking and rolling mechanism and the thin rod inevitably cause the appearance damage and the extrusion deformation of the thin rod, and the appearance quality and the performance consistency of the finished product are directly affected. In order to solve the above-mentioned defect of contact processing, a non-contact drum-shaped wheel perforation scheme has appeared in the industry, for example, CN1041165C discloses a perforation device and method for producing ventilated objects, the scheme adsorbs and drives double-length thin rods to spin through rotary suction nozzles arranged on the circumference of the drum-shaped wheel, a laser rotary polygon mirror is arranged in the drum-shaped wheel, and after the beam incident along the central axis is split and turned by a spectroscope and a reflecting mirror, the scanning perforation on the inner side and the outer side of the double-length thin rods is completed through the reflection of the rotary polygon mirror. The technical scheme has realized industrialized application and is suitable for high-speed cigarette machine types such as GD121, GD121P and the like, but has obvious technical defects in practical application: First, the driving load is large, the power consumption and the volume exceed the standard, and the equipment adaptability is extremely poor. The core rotary execution part of the scheme is a metal rotary body with the far end diameter of 190mm, the integral mass is about 6kg after the rotary polygon mirror, the lens mounting seat, the focusing mechanism and the dustproof and dustproof mechanism are integrated, the moment of inertia is extremely large, under the conventional working conditions of the scanning rotating speed of 7500-8000rpm and the acceleration time of 12s, the rated torque of the driving motor is required to reach 7.7Nm-8.8Nm through measurement and calculation, the maximum torque of the actually matched driving motor reaches 17Nm and the power is 7.3KW, the large-torque and high-power motor inevitably brings larger mounting volume, the equipment transformation of the conventional cigarette making machine cannot provide sufficient mounting space, the running cost of equipment is also improved due to high energy consumption, and the popularization and application of the technical path are severely limited. Secondly, the requirement of a multi-row hole processing technology cannot be met, and the expansibility is poor. In the scheme, each beam of light splitting can only perforate the single-side surface of the double-length thin rod, a single thin rod single side can only form a single row of holes distributed circumferentially, the single-row thin rod single-side surface can not be adapted to the production process of double-row holes and multiple rows of holes of the current industry, if multiple light beam output is realized by replacing the double-focusing matrix lens, extremely high precision requirements are provided for the mounting angle of the lens and the coaxiality of incident light beams, light splitting deviation is extremely easy to occur, and the structural complexity, the assembly difficulty and the maintenance cost of equipment are greatly improved. In order to realize processing of multiple rows of holes of a thin rod, the patent number CN202011221234 of the prior application of the team discloses an on-line thin rod multiple row hole punching device. However, the technical short plates which cannot be avoided still exist in the scheme, in order to realize the transmission of the light beams with the included angles of the two belts, the diameter of the matched hollow shaft is required to reach 95mm, the large-size hollow shaft not only further increases the moment of inertia of the rotating part and the requirement of driving torque, but also causes extremely intense installation space inside the drum-shaped wheel, dust generated in the punching process is difficult to effectively disperse, optical lens pollution and damage are easily caused, and long-term operation stability and punching precision of equipment are affected. In summary, in the existing slim rod laser perforation technology, there are product quality defect of contact processing, high torque and high power consumption problem of non-contact scheme, problem of insufficient processing capability or high complexity of structure of mult