CN112171067B - A kind of laser disorder and uniform texturing processing method of roll surface - Google Patents
A kind of laser disorder and uniform texturing processing method of roll surface Download PDFInfo
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- CN112171067B CN112171067B CN202010855511.7A CN202010855511A CN112171067B CN 112171067 B CN112171067 B CN 112171067B CN 202010855511 A CN202010855511 A CN 202010855511A CN 112171067 B CN112171067 B CN 112171067B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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Abstract
本发明提供了一种轧辊表面激光无序均匀毛化加工方法，包括如下步骤：根据毛化点参数和轧辊参数，确定毛化点分布坐标集；根据毛化点参数确定激光功率P和激光脉宽λ；根据轧辊转动角度RA和激光光束到轧辊端面的距离Dx，确定激光毛化加工的区域；根据激光毛化加工区域内需要加工的毛化点，确定激光触发时刻tk和激光光束偏摆角度η；对轧辊表面毛化点加工。本发明通过将轧辊展开表面二维无序均匀的毛化点分布坐标集作为激光毛化设备加工输入参数，简化控制系统硬件设备，同时输入的坐标点阵坐标参数经控制系统处理后，转化成设备各运动和执行部件的控制信号，对轧辊表面进行激光毛化处理，达到无序均匀分布的技术要求。
The invention provides a laser disordered and uniform texturing processing method on the surface of a roll, which comprises the following steps: determining a coordinate set of texturing point distribution according to texturing point parameters and roll parameters; determining a laser power P and a laser pulse according to the texturing point parameters Width λ; according to the roll rotation angle RA and the distance Dx from the laser beam to the end face of the roll, determine the laser texturing area; according to the texturing points to be processed in the laser texturing area, determine the laser trigger time t k and the laser beam deflection Swing angle η; process the textured point on the surface of the roll. The invention simplifies the hardware equipment of the control system by using the two-dimensional disordered and uniform distribution coordinate set of texturing points on the unrolled surface of the roll as the processing input parameters of the laser texturing equipment, and the input coordinate lattice coordinate parameters are processed by the control system and converted into The control signal of each moving and executing part of the equipment is used to carry out laser texturing treatment on the surface of the roll to meet the technical requirements of disordered and uniform distribution.
Description
Technical Field
The invention relates to the field of roller surface processing, in particular to a roller surface laser disordered uniform texturing processing method.
Background
The cold-rolled plate strip has the advantages of accurate size, flat and straight plate shape, good surface quality, high production efficiency and the like, and is widely applied to various fields. The surface roughening of the cold roller is a surface pretreatment technology for producing high-quality sheets, and the roughened appearance is transferred to the surface of a sheet in the rolling process, so that the surface roughening method is of great importance to the improvement of the stamping formability, the distinctness of image, the corrosion resistance, the wear resistance and the like of the cold-rolled sheet.
At present, the roughening technology of the roller surface comprises laser roughening, electric spark roughening, shot blasting roughening, electron beam roughening and the like. The shot blasting texturing appearance has poor quality and repeatability, and the dust pollution is serious, so the shot blasting texturing appearance is basically eliminated. When the electron beam is roughened, the roller needs to rotate in high vacuum, the technical difficulty is high, the process cost is high, and the method is not suitable for industrial mass production. The electric spark texturing appearance has poor retentivity, excessive steel fluctuation is easy to cause in the rolling process, manufacturing equipment mainly depends on import, and the operation cost is high. Moreover, equipment manufacturers monopolize key core technologies, and the expansion of the application level of the cold rolling technology and the process in China is severely restricted. Laser texturing is highly favored by the industry because of its high topography quality, environmental friendliness, moderate operating costs, and the like.
The laser texturing method is different from the randomness and the turbulence of electric spark texturing, and the laser texturing has the characteristics of regularity and consistency. The regular distribution of the texturing points can cause the defects of moire fringes, uneven oiling, local cracking, vibration lines and the like of the plate. When the roll rolls the strip, the plate surface has evenly distributed straight lines along the length direction by transfer printing. Therefore, the plate has strong reflection at a plurality of angles under the irradiation of light, and finally the plate surface has different reflection effects when observed at different angles, thereby affecting the appearance of the surface of the steel plate and becoming a prominent problem which hinders the large-scale engineering popularization and application of the roller laser texturing technology for many years.
Aiming at the technical requirement of irregular distribution of micro pits of a roughened plate in engineering application, a large number of experts and scholars develop a large amount of work around improving the surface appearance quality of the roller after laser roughening treatment, and starting from laser roughening equipment, a random factor is added through a random signal generating source, the action mode of pulse laser and the roller is controlled, and the technical requirement of irregular distribution is realized.
For example, the patent discloses a method and equipment for processing the surface of a laser disordered textured roller, wherein a random signal generator is used for controlling the duty ratio and frequency of pulse laser to change the spot shape of processed light, and meanwhile, the random interval of textured points in the circumferential direction of the roller is realized. The method has the advantages that controllable and random texturing points in the circumferential direction of the roller are realized, and the defect that the surface texturing appearance has directionality is overcome.
For another example, the patent discloses a roller surface roughening laser processing system and method with irregular image roughening micro-pits, wherein a random image switch device receives 1 and 0 information switches of an irregular black-and-white image, and drives a laser processing device to process the surface of the roller, so that irregularly distributed roughening micro-pits are realized. The method has the advantages that the irregular roughened micro-pits on the surface of the roller are visualized through images, and the method has the defects that the density degree of roughened points is low, the axial roughened distribution still has strong regularity, and the surface stripe-shaped color difference defect is easy to generate after the plate is coated.
For another example, a laser texturing method for realizing uniform random distribution of textured points is disclosed, wherein a random signal generator is used for generating a pseudo-random signal, and random delay and random deflection of laser pulses are controlled to generate uniformly and randomly distributed textured points. The method has the advantages of realizing two-dimensional disordered distribution in the circumferential direction and the axial direction, solving the problem that the surface texturing appearance has directionality, and having the defect that the laser texturing treatment effect cannot be predicted and adjusted.
In summary, although many experts and scholars do a lot of work on the random distribution of laser texturing points, the technology system for solving the disordered distribution of the laser texturing points is not completely formed from design to processing. The prior art directly starts from laser texturing equipment, a pseudo-random signal is added through a random signal generator, light is emitted from a laser, a generated textured point is difficult to control and adjust, and meanwhile, the processing efficiency of the textured point is limited by the rotating frequency of a vibrating mirror. In addition, a random image switch device is adopted to receive black-and-white image information generated in advance for lighting, the density of the textured points is closely related to the image pixels, and the density of the textured points is lower. The two technical schemes also have problems in engineering application, and the disordered uniform distribution of the roller surface roughening morphology cannot be completely realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a laser disordered uniform texturing processing method for the surface of a roller, which is characterized in that a two-dimensional disordered uniform texturing point distribution coordinate set of the unfolded surface of the roller is used as a processing input parameter of laser texturing equipment, hardware equipment of a control system is simplified, simultaneously, an input coordinate lattice coordinate parameter is processed by the control system and then converted into control signals of each movement and execution part of the equipment, and the surface of the roller is subjected to laser texturing processing, so that the technical requirement of disordered uniform distribution is met.
The present invention achieves the above-described object by the following technical means.
A roller surface laser disorder uniform texturing processing method comprises the following steps:
determining a distribution coordinate set (x, y) of the textured points according to the textured point parameters and the roller parameters;
determining laser power P and laser pulse width lambda according to the texturing point parameters;
determining a laser texturing processing area according to the roller rotation angle RA and the distance Dx from the laser beam to the roller end face;
determining laser trigger time t according to the textured points to be processed in the laser texturing processing areakAnd a laser beam deflection angle η;
and (5) processing the roller surface roughening points.
Further, the determining the distribution coordinate set (x, y) of the textured points specifically includes the following steps:
randomly determining a positive NUM edge grid;
according to the area occupancy rate beta of the textured points0And the excircle diameter D of the texturing point, and determining the size of the grid unit;
using the size of the regular NUM edge grid and grid unit to perform grid division on the roller spreading plane, obtaining the coordinate of the grid center point as the coordinate value (X) of regular uniform distributioni0，Yi0)；
Generating a pair of random number sequences by a true random number generator, the pair of random number sequences being scaled to generate random offset coordinate values (Δ x)i，Δyi)；
And (4) superposing the random offset coordinate values and the regular uniformly distributed coordinate values to obtain a textured point distribution coordinate set (x, y).
Further, the area occupancy ratio beta according to the textured points0And the excircle diameter D of the textured point, and determining the size of a grid unit as follows:
determining the area A of the grid unit circumscribed with the texturing points according to the excircle diameter D of the texturing points0；
Calculating the actual area occupancy beta:
wherein: alpha is a set area as an amplification factor;
comparison of area occupancy of textured spots0And actual area occupancy β: when it is actualOccupancy ratio beta<β0Then readjust the area amplification factor until beta is larger than or equal to beta0；
When beta is not less than beta0While passing through the area A of the grid cell0The grid cell size is obtained.
Further, the random number sequence pair generates a random offset coordinate value after being scaled, specifically:
a pair of random numbers are extracted from the random number sequence pair, and the random offset coordinate (delta x) is obtained by processing the random numbers in a scaling operation modei,Δyi) And the random offset coordinates (Δ x)i,Δyi) Within the grid cell.
Further, according to the roll rotation angle RA and the distance Dx between the laser beam and the roll end face, determining the laser texturing area, specifically as follows:
dividing the length L of the roller into M equal parts, and dividing the unfolded roller into N equal parts in one rotation period of the roller for dividing the motion track of the laser beam;
an upper boundary line Y parallel to the radial direction of the roller is constructed by taking the equal division point as the center and taking L/2M as the intervalupAnd a lower boundary line YdownI.e. by
Yup＝R×{[round(RA)/360°]+2π/N}
Ydown＝R×{[round(RA)/360°]-2π/N}；
The right boundary line X is constructed by the bisector of F-1, F +1 in the axial direction of the rollerrightAnd the left boundary line XliftI.e. by
Xright＝Dx+L/2M
Xlift＝Dx-L/2M；
Wherein R is the roller radius; l is the length of the roller; the roller rotation angle RA is the rotation angle of each equal part of rollers; dx is the distance from the laser beam to the end face of the roller;
the boundary line forms a laser texturing region.
Further, the method comprises the following specific steps of determining textured points needing to be processed in the laser texturing processing area:
in the distribution coordinate set (x, y) of the texturing points, the texturing points which satisfy the condition that | x-Dx | ≦ L/2M, and | y-Rx [ Round (RA)/360 | ≦ 2 π R/N are the texturing points to be processed in the laser texturing processing area.
Further, according to the textured points to be processed in the laser texturing processing area, determining the laser trigger time tkAnd a laser beam deflection angle eta, specifically:
measuring the shortest distance D _ laser _ roll from a light outlet of a laser beam to the surface of the roller when the laser is focused on the surface of the roller;
determining the triggering time t of the texturing point processing in the laser texturing processing areakAnd laser beam deflection angle η:
tk＝y/(2Rot*πR)
η＝arctan[(x-V×tk)/D_laser_roll]
wherein Rot is the rotating speed of the roller; v is the translation speed of the laser beam along the axis of the roller, and is Rot L/M.
The invention has the beneficial effects that:
1. according to the laser disordered and uniform texturing processing method for the surface of the roller, the designed texturing point distribution coordinate set is adopted and directly converted into the processing parameters of the laser texturing equipment, a random signal generator is not required to be added, the disordered and uniform distribution closed-loop processing of the texturing appearance of the surface of the roller is realized, and the visual processing effect is achieved.
2. According to the roller surface laser disordered uniform texturing processing method, the processing efficiency of the laser texturing points can reach 100K/s, and is far higher than that of the laser texturing points in the prior art.
3. According to the laser disordered uniform texturing processing method for the surface of the roller, provided by the invention, the geometric parameters of texturing points can be accurately regulated and controlled by changing laser parameters, and the mapping relation between the geometric parameters of the laser texturing points and the laser parameters is established on the basis of process parameter data, so that the technical requirements of different cold-rolled sheet production processes on the texturing points can be met.
Drawings
FIG. 1 is a flow chart of the laser disordered uniform texturing processing method for the surface of the roller.
FIG. 2 is a flow chart of a method for designing a distribution coordinate set of textured points according to the present invention.
Fig. 3 is a schematic view of a roll filling grid according to the present invention.
Fig. 4 is a flowchart of the mesh size determination according to the present invention.
FIG. 5 is a schematic diagram of the superposition of regular coordinates and offset coordinates according to the present invention.
FIG. 6 is a schematic structural view of the laser texturing apparatus for a roll according to the present invention.
Fig. 7 is a schematic drawing showing the spreading of the roller in a plane after one rotation.
FIG. 8 shows t according to the present inventionfA schematic view of a beam spot machining area at a time.
Fig. 9 is a schematic diagram illustrating the solution of the deflection angle of the laser beam according to the present invention.
FIG. 10 is a schematic control diagram of the laser texturing apparatus according to the present invention.
In the figure:
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
The laser texturing processing device shown in fig. 6 has a 5-axis movement function, and can realize the translation X in the height direction Z, the radial direction Y of the roller and the axial direction of the roller, the rotation along the central shaft psi of the roller and the deflection of the laser beam at an angle eta. The processing method provided by the invention can meet the technical requirement of quickly processing a large amount of dot matrix coordinate data to form processing parameters of the laser texturing device, ensures that the disordered and uniform texturing point on the surface of the roller is highly matched with the designed dot matrix coordinate, and completes texturing processing on the surface of the roller by controlling the rotation of a machine tool spindle and the translation of a laser through motion.
As shown in FIG. 1, the laser disordered uniform texturing processing method for the roller surface comprises the following steps:
s01: determining a motion parameter, a texturing point parameter and a roller parameter;
the motion parameters refer to the translation speed V of a laser beam along the X direction of a roller axis and the rotating speed Rot of a roller along a roller central axis psi, the length L of the roller is divided into M equal parts, and each equal part of the roller needs to rotate for one circle;
establishing a translation speed V in the X direction of the axis of the starting roller and a rotation speed Rot of a psi-axis:
Rot＝MV/L。
texturing point parameters: the shape of the textured point, the diameter D of the excircle of the textured point, the height H of the bulge of the textured point and the area occupancy rate beta of the textured point0。
Roll parameters: roll radius R and roll length L.
S02: determining a distribution coordinate set (x, y) of the textured points according to the textured point parameters and the roller parameters, as shown in FIG. 2:
s02.1: randomly determining a positive NUM polygonal grid; as shown in fig. 3, the regular numberedge mesh may be a regular triangle, a regular quadrangle, or a regular hexagon.
S02.2: as shown in fig. 4, the area occupancy of textured dots β0And the excircle diameter D of the textured point, and determining the size of a grid unit as follows:
the external circle diameter of the texturing point is measured, the average value is taken to determine the external circle diameter D of the texturing point. Determining the area A of the grid unit circumscribed with the texturing points according to the excircle diameter D of the texturing points0；
Calculating the actual area occupancy beta:
wherein: alpha is a set area as an amplification factor;
comparison of area occupancy of textured spots0And actual area occupancy β: when actual area occupancy rate beta<β0Then readjust the area amplification factor until beta is larger than or equal to beta0(ii) a Here, the area occupancy of the textured dots is β0The area occupancy rate of the textured points is specified for the technical requirements to be met.
When beta is not less than beta0While passing through the area A of the grid cell0The grid cell size is obtained.
S02.3: using the size of the regular NUM edge grid and grid unit to perform grid division on the roller spreading plane, obtaining the coordinate of the grid center point as the coordinate value (X) of regular uniform distributioni0,Yi0)；
The roller is unfolded, the long side of the texturing area is the roller perimeter L, and the wide side of the texturing area is the roller diameter phi. And adopting a square grid filling mode to perform grid division on the textured area.
S02.4: generating a pair of random number sequences by a true random number generator, the pair of random number sequences being scaled to generate random offset coordinate values (Δ x)i，Δyi)；
The sampling principle of the oscillator is adopted to design a true random number generator to generate a true random number, and meanwhile, the oscillator is influenced during working and fluctuates in a small range by utilizing the existence of circuit thermal noise. When the sampling signal is just sampled to a jitter interval, the data generated by sampling is ensured to have complete randomness.
The true random number generator is composed of a high-frequency oscillator, a low-frequency oscillator and a D trigger, wherein the output of the high-frequency oscillator is used as the input of the trigger, and the output of the low-frequency oscillator is used as the clock signal input of the trigger. When the rising edge of the output signal of the low-frequency oscillator arrives each time, the D flip-flop samples the high-frequency oscillator to generate one-bit data.
A pair of random numbers are extracted from the random number sequence pair, and the random offset coordinate (delta x) is obtained by processing the random numbers in a scaling operation modei,Δyi) (ii) a The random offset coordinate (Δ x)i,Δyi) Within the grid cell.
S02.5: as shown in FIG. 5, the random offset coordinate values and the regular uniformly distributed coordinate values are superimposed to obtain a two-dimensional lattice coordinate distribution data set (X)i,Yi) Wherein:
Xi＝Xi0+Δxi
Yi＝Yi0+Δyi。
here, the two-dimensional lattice coordinate distribution data set (X)i,Yi) Namely a distribution coordinate set (x, y) of the textured points.
S03: and determining laser processing parameters, namely laser power P and laser pulse width lambda according to the texturing point parameters.
The laser texturing method comprises the steps of obtaining texturing parameters, wherein the texturing parameters comprise texturing point types, texturing point diameters D and texturing point heights h, and laser power P and pulse width lambda are directly selected and output through the mapping relation between the laser texturing parameters and the laser parameters. The establishment of the mapping database of the laser texturing point geometric parameters and the laser parameters is based on the process parameter data, and a large number of laser texturing point processing process tests need to be developed.
S04: according to tfDetermining t according to the roller rotation angle RA and the distance Dx between the laser beam and the fixed end face of the roller fed back at any momentfThe laser texturing of the machined area is timed.
As shown in fig. 7, in each rotation period in the direction of the roll axis X, the X-direction position sensor and the Ψ -axis incremental encoder both feed back N signals;
spreading the rollers processed in one period, and dividing the motion trail of the laser beam according to N equal parts;
as shown in FIG. 8, an upper boundary line Y parallel to the radial direction of the rolls is constructed with the equal parts as the center and at an interval of L/2MupAnd a lower boundary line YdownI.e. by
Yup＝R×{[Round(RA)/360°]+2π/N}
Ydown＝R×{[round(RA)/360°]-2π/N}；
The right boundary line X is constructed by the bisector of F-1, F +1 in the axial direction of the rollerrightAnd the left boundary line XliftI.e. by
Xright＝Dx+L/2M
Xlift＝Dx-L/2M；
Wherein R is the roller radius; l is the length of the roller; the roller rotation angle RA is the rotation angle of each equal part of rollers; dx is the distance from the laser beam to the roll end face.
S05: calculating and determining tfThe specific calculation method of the textured points needing to be machined in the machining area at any moment is as follows:
distributing coordinate sets (x, y) and t to the textured pointsfThe position of the laser beam on the roller spreading plane is judged at the moment, and t is determinedfAnd the textured points to be processed are needed in the processing area at any time.
|x-Displacement_x|≤πL/M
|y-R×[round(Rotate-Angle)/360°]|≤2πR/N。
The textured points meeting the requirements are textured points needing to be processed in the laser texturing processing area.
S06: converting the coordinates of the textured points in the processing area into laser processing parameters, namely the laser trigger time tkAnd a laser beam deflection angle η.
As shown in fig. 9, the trigger time tkAt tfTime t andf+1during the time, the shortest distance D _ laser _ roll from the end face of the laser to the surface of the roller after the laser is focused on the surface of the roller, and the triggering time t of the texturing point processing in the output processing area is calculatedkAnd the laser beam deflection angle eta.
tk＝y/(2Rot*πR)
η＝arctan[(x-V×tk)/D_laser_roll]
Wherein Rot is the rotating speed of the roller; v is the translation speed of the laser beam along the axis of the roller, and is Rot L/M.
S07: and controlling the laser texturing processing device to realize the processing of the texturing points on the surface of the roller.
As shown in fig. 10, the servo drive motors in the height direction Z and the diameter direction Y of the roll of the laser texturing processing device are responsible for resetting and focusing adjustment according to a set translational velocity V, the translational motion X in the roll axis direction, the servo drive motor along the roll central axis Ψ according to the set translational velocity V in the X direction and the rotational speed Rot of the roll along the roll central axis Ψ.
Laser processing parameter triggering time tkControlling an acousto-optic Q-switch driver to switch on and off a pulse excitation signal of a laser at the moment, controlling the micro-deflection of the laser by a laser processing parameter deflection angle eta, and adding laserThe power P, and the pulse width λ, control the energy of the laser beam.
The laser outputs high-energy beams according to the requirements of laser processing parameters, and meanwhile, the laser translates and the roller rotates to achieve laser texturing processing on the surface of the roller.
The invention realizes the conversion of disordered uniformly distributed lattice coordinates and laser processing parameters on the basis of generating the disordered uniformly distributed lattice coordinates of the roughened morphology on the unfolded surface of the roller, does not need to add a random signal generating device in a control system, and realizes the closed-loop processing of laser roughened points on the surface of the roller.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (6)
1. The laser disordered and uniform texturing processing method for the surface of the roller is characterized by comprising the following steps of:
determining a distribution coordinate set (x, y) of the textured points according to the textured point parameters and the roller parameters, and specifically comprising the following steps:
randomly determining a positive NUM edge grid;
according to the area occupancy rate beta of the textured points0And the excircle diameter D of the texturing point, and determining the size of the grid unit;
using the size of the regular NUM edge grid and grid unit to perform grid division on the roller spreading plane, obtaining the coordinate of the grid center point as the coordinate value (X) of regular uniform distributioni0,Yi0)；
Generating a pair of random number sequences by a true random number generator, the pair of random number sequences being scaled to generate random offset coordinate values (Δ x)i,Δyi)；
Superposing the random offset coordinate values and the regular uniformly distributed coordinate values to obtain a textured point distribution coordinate set (x, y);
determining laser power P and laser pulse width lambda according to the texturing point parameters;
determining a laser texturing processing area according to the roller rotation angle RA and the distance Dx from the laser beam to the roller end face;
determining laser trigger time t according to the textured points to be processed in the laser texturing processing areakAnd a laser beam deflection angle η;
and (5) processing the roller surface roughening points.
2. The roller surface laser disorder uniform texturing method according to claim 1, characterized in that the area occupancy rate β according to textured points0And the excircle diameter D of the textured point, and determining the size of a grid unit as follows:
determining the area A of the grid unit circumscribed with the texturing points according to the excircle diameter D of the texturing points0；
Calculating the actual area occupancy beta:
wherein: alpha is a set area as an amplification factor;
comparison of area occupancy of textured spots0And actual area occupancy β: when actual area occupancy rate beta<β0Then readjust the area amplification factor until beta is larger than or equal to beta0；
When beta is not less than beta0While passing through the area A of the grid cell0The grid cell size is obtained.
3. The laser disordered uniform texturing processing method for the roller surface according to claim 1, characterized in that a random number sequence pair generates random offset coordinate values after scaling treatment, and specifically comprises:
a pair of random numbers are extracted from the random number sequence pair, and the random offset coordinate (delta x) is obtained by processing the random numbers in a scaling operation modei,Δyi) And is andthe random offset coordinate (Δ x)i,Δyi) Within the grid cell.
4. The roller surface laser disorder uniform texturing processing method according to claim 1, characterized in that the laser texturing processing area is determined according to the roller rotation angle RA and the distance Dx between the laser beam and the roller end surface, and specifically as follows:
dividing the length L of the roller into M equal parts, and dividing the unfolded roller into N equal parts in one rotation period of the roller for dividing the motion track of the laser beam;
an upper boundary line Y parallel to the radial direction of the roller is constructed by taking the equal division point as the center and taking L/2M as the intervalupAnd a lower boundary line YdownI.e. by
Yup＝R×{[round(RA)/360°]+2π/N}
Ydown＝R×{[round(RA)/360°]-2π/N}；
The right boundary line X is constructed by the bisector of F-1, F +1 in the axial direction of the rollerrightAnd the left boundary line XliftI.e. by
Xright＝Dx+L/2M
Xlift＝Dx-L/2M；
Wherein R is the roller radius; l is the length of the roller; the roller rotation angle RA is the rotation angle of each equal part of rollers; dx is the distance from the laser beam to the end face of the roller;
the boundary line forms a laser texturing region.
5. The roller surface laser disorder uniform texturing processing method according to claim 4, characterized in that the texturing points to be processed in the laser texturing processing area are determined as follows:
in the distribution coordinate set (x, y) of the texturing points, the texturing points which satisfy the condition that | x-Dx | ≦ L/2M, and | y-Rx [ Round (RA)/360 | ≦ 2 π R/N are the texturing points to be processed in the laser texturing processing area.
6. The roll surface of claim 4 having laser disorderThe uniform texturing method is characterized in that laser trigger time t is determined according to texturing points needing to be processed in a laser texturing processing areakAnd a laser beam deflection angle eta, specifically:
measuring the shortest distance D _ laser _ roll from a light outlet of a laser beam to the surface of the roller when the laser is focused on the surface of the roller;
determining the triggering time t of the texturing point processing in the laser texturing processing areakAnd laser beam deflection angle η:
tk＝y/(2Rot*πR)
η＝arctan[(x-V×tk)/D_laser_roll]
wherein Rot is the rotating speed of the roller; v is the translation speed of the laser beam along the axis of the roller, and is Rot L/M.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855511.7A CN112171067B (en) | 2020-08-24 | 2020-08-24 | A kind of laser disorder and uniform texturing processing method of roll surface |
| JP2021539050A JP7236771B2 (en) | 2020-08-24 | 2020-08-27 | Disorderly uniform roughening processing method of rolling roll surface by laser |
| PCT/CN2020/111698 WO2022041035A1 (en) | 2020-08-24 | 2020-08-27 | Roller surface laser disordered and uniform texturing processing method |
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| CN114833455B (en) * | 2022-05-23 | 2024-02-23 | 荣烯新材(北京)科技有限公司 | Method, device and application for carrying out unordered micro-modeling on roller surface of roller by femtosecond laser |
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| CN100462180C (en) * | 2005-10-28 | 2009-02-18 | 中国科学院力学研究所 | Laser processing system and method for surface texturing of rollers with random deflection of texturing points |
| CN100475412C (en) * | 2005-11-01 | 2009-04-08 | 中国科学院力学研究所 | Laser processing system and method for surface texturization of rollers with irregular texturized points on the circumference |
| CN101444874B (en) * | 2008-12-31 | 2011-06-08 | 东北轻合金有限责任公司 | Cold roll laser texturing method |
| CN107511588A (en) * | 2016-06-17 | 2017-12-26 | 宝山钢铁股份有限公司 | A kind of laser texturing method for realizing the uniformly random distribution of texturing point |
| CN105880839A (en) * | 2016-06-23 | 2016-08-24 | 华中科技大学 | Random control method for laser frequency energy of fiber laser for roll roughening |
| CN109175707B (en) * | 2018-09-10 | 2021-04-20 | 武汉武钢华工激光大型装备有限公司 | Method for laser disordered texturing roller surface |
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