CN102699525B - A kind of processing method of laser disordered texturing roller surface and process equipment - Google Patents
A kind of processing method of laser disordered texturing roller surface and process equipment Download PDFInfo
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Abstract
The present invention relates to a kind of processing method and process equipment of laser disordered texturing roller surface, described random signal generator control impuls laser instrument produces unordered pulse laser beam, after focusing, process the helix of a zero lap track at roller surface, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value; The stochastic variable that random signal generator sends followed by described pulse laser, random dutycycle and the frequency changing laser pulse bundle; Process equipment, comprise numerical control roll lathe, laser instrument and laser Machining head, described laser Machining head is done axially at the uniform velocity to move along the side bus of roll, pass through the technical program, the roll really meeting disordering and require can be produced, and produce the steel plate meeting disordering and require, adopt laser to carry out processing roll interface disorder hair side hardness high, production cost is low, pollution-free, substantially increase the steel transportation amount of roll.
Description
Technical field
The present invention relates to a kind of processing method and process equipment of Texturing Surface of Roll surface, particularly relate to processing method and the process equipment of a kind of laser disordered texturing roller surface that can produce various different disordered texturing " point ".
Background technology
In the industrial production such as current iron and steel and non-ferrous metal, the conventional method having three class production texturing flat cold-rolled sheets, the first kind, adopts blasting technology Texturing Surface of Roll, then by its chrome-faced, is used for being rolled strip; Equations of The Second Kind, adopts spark technology Texturing Surface of Roll, then by its chrome-faced, is used for being rolled strip; 3rd class, adopts laser technology Texturing Surface of Roll, is directly used in rolling strip.
Because chromium plating is very large to the pollution of environment, most of producer eliminates chrome-faced technique, directly employing shot-peening or spark technology Texturing Surface of Roll, and is directly used for rolling strip, but the method for this half intercept form makes the steel transportation amount of roll greatly reduce.
The structure adopting the first kind and Equations of The Second Kind technology to come production texturing plate surface is in the prior art really unordered pitted skin, and adopt three types of technology, no matter be CO2 laser roughening, or the structure on YAG Solid State Laser texturing production texturing plate surface is all orderly pitted skins, the refraction of product to light of producing for orderly pitted skin mode has directionality, and this is because the uniformity of texturing point determines.
In the prior art, first kind blasting technology is due to dust pollution, unhealthful, and the repeatability of texturing is difficult to reproduce, and is difficult to grasp; It is very high and have certain oil pollution to environment that Equations of The Second Kind onElectrical Discharge Texturing makes price; For the roll of the 3rd class laser technology texturing, steel transportation amount is higher than the roll of first, second class half intercept form method texturing, and the steel plate of rolling, deep drawing quality, percentage elongation are also higher than the first kind and Equations of The Second Kind.
In the prior art, the result that current laser texturing equipment texturing goes out is all orderly, no matter be utilize CO2 laser, still YAG laser is utilized, no matter be pulse laser, still mechanically continuous laser be transformed into pulse laser or convert pulse laser to by acoustooptic switch, no matter be single processing head, still add foreman's, the size of its texturing point, pattern, arrangement is consistent substantially, and be orderly, therefore, roller surface is a uniform array arranged in order by the effect that texturing goes out, when roll rolling strip, pass through transfer printing, plate face texture structure is also ordered arrangement.And the panel of present car panel and high-grade household appliances, not only there is requirement to the mechanical performance of steel plate, and also have requirement to the outward appearance of surface of steel plate, laser orderly texturing plate due to the pattern of texturing " point " consistent with marshalling, plate is under the photograph of light is thanked, there is certain several angle reflection strong, finally cause there is different reflecting effects in different angle views plate faces.
Summary of the invention
The present invention is intended to the processing problems solving disordered texturing roller surface, thus the structure making roll shut out the surface of steel plate come is unordered pitted skin, by the processing method in the present invention and process equipment, the roll that surface texture is unordered pitted skin can be produced easily.And improve the steel transportation amount of roll.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of processing method of laser disordered texturing roller surface, described random signal generator control impuls laser instrument produces unordered pulse laser beam, after focusing, process the helix of a zero lap track at roller surface, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value; The stochastic variable that random signal generator sends followed by described pulse laser, the random dutycycle changing laser pulse bundle.
The stochastic variable that random signal generator sends followed by described pulse laser, the random pulse frequency changing pulse laser and send.Described pulse laser can be optical fiber laser or YAG solid state laser or semiconductor laser or gas laser or liquid laser.
The spacing of described texturing " point " in the circumference of roll changes with the frequency of pulse and the random change of dutycycle, texturing " point " density in roll circumference be by the linear velocity on rotary roller surface and the pattern of required texturing " point " set random signal generator the frequency separation produced without sequential signal determine, when the constant interval of frequency is wider, the topographical difference of texturing " point " is larger, when the constant interval of frequency is narrower, the topographical difference of texturing " point " is less; Frequency separation is narrower, and frequency band is higher, then texturing " point " density in roll circumference is then higher; Frequency separation is wider, and frequency band is lower, then texturing " point " density in roll circumference is then lower.
A kind of process equipment of laser disordered texturing roller surface, include numerical control roll lathe, described roll utilizes numerical control roll lathe to make roll under the overhead in opposite directions that lathe is top, central axis round self does rotary motion at the uniform velocity, include laser instrument and laser Machining head, described laser Machining head is arranged on the upper slide rest of numerical control roll lathe, described laser Machining head is done axially at the uniform velocity to move along the side bus of roll, the helix of a zero lap track is processed at roller surface, on the axial direction of roll, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value.
The rotating speed of described machine tool chief axis is rotating speed per minute is that 5-300 turns.
Described laser Machining head is equipped with range tracking element and roller diameter measurement mechanism, after being measured by roller diameter measurement mechanism, realizes auto-focusing.
Described random signal generator controls the pulse laser that laser instrument sends, make its random change frequency and dutycycle disorderly, thus make the LASER SPECKLE that the laser Machining head after by the focusing of focus lamp processes, time but round dot, time and elliptical point, time but short point, time but long point, dot spacing on roll circumference direction, Shi Erchang, time and short, spacing is also unordered, thus the place making laser roughening on roll cross becomes texturing " point ", the place excessively of non-texturing becomes " sky ", unordered texturing " point " and " sky " arrangement pattern out are also unordered.
Be 10 in the energy density of LASER SPECKLE
4~ 10
6w/cm
2time, gasify in top layer, bottom melts, and under the effect of centrifugal force and assist gas, forms micro-boss and pit, because the pattern of " point " is inconsistent, so the pattern of boss and pit is also inconsistent, boss and pit also inconsistent to the refraction of light.
Beneficial effect after employing technique scheme is: the processing method of a kind of laser disordered texturing roller surface of the present invention and process equipment, pass through the technical program, the roll directly just meeting disordering and requiring can be produced, and produce the steel plate meeting disordering and require, laser is adopted to carry out processing roll interface disorder hair side hardness high, production cost is low, pollution-free, substantially increases the steel transportation amount of transfer roller.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of process equipment of the present invention.
Fig. 2 is that after processing of the present invention, roller surface disordered texturing has " point " and has the design sketch of " sky ".
Fig. 3 is that after processing of the present invention, roller surface disordered texturing has " point " and the design sketch without " sky ".
Fig. 4 is perspective view of the present invention.
In figure, 1 roll, 2 laser Machining heads, 3 laser beams, 4 pulse lasers, 5 random signal generators, 6 lathes are top, 7 head of a bed, 8-chuck, 9 rolls, 10 tailstocks, 11 numerical control roll lathes.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described further.
The present invention relates to a kind of processing method of laser disordered texturing roller surface, unordered pulse laser beam 3 is produced with random signal generator 5 control impuls laser instrument 4, after focusing, go out the helix of a zero lap track in roll 1 Surface Machining, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value; The stochastic variable that random signal generator 5 sends followed by described pulse laser 4, the random dutycycle changing laser beam 3; Described pulse laser 4 changes by the stochastic variable that random signal generator 5 sends the pulse frequency that pulse laser 4 sends at random.
The pulse laser beam 3 of random signal generator 5 control impuls laser instrument 4, through laser Machining head 2 processing roll 1 surface, roll 1 surface is made to produce " point " of different-shape in the place being subject to laser action, obtain in the place not being subject to laser action " sky " of different-shape, and control the density of these " points " and " sky ", form unordered roll 1 surface texture structure by these " points " and " sky ", thus make roll 1 surface obtain unordered texturing effect; Random signal generator 5 utilizes one-chip computer to produce the signal of telecommunication unordered at random, the pulse of control impuls laser instrument 4, the pulse laser beam 3 that pulse laser 4 is sent not only pulse frequency changes at random, and the dutycycle of pulse also changes at random, described random signal generator 5 frequency upper and lower limit can be arranged, and described pulse laser 4 can be optical fiber laser or YAG solid state laser or semiconductor laser or gas laser or liquid laser.
The spacing of described texturing " point " in the circumference of roll 1 changes with the random change of pulse frequency and dutycycle, texturing " point " density in roll 1 circumference be by the linear velocity on rotary roller 1 surface and the pattern of required texturing " point " set random signal generator 5 the frequency separation produced without sequential signal determine, when the constant interval of frequency is wider, the topographical difference of texturing " point " is larger, when the constant interval of frequency is narrower, the topographical difference of texturing " point " is less; Frequency separation is narrower, and frequency band is higher, then texturing " point " density in roll 1 circumference is then higher; Frequency separation is wider, and frequency band is lower, then texturing " point " density in roll 1 circumference is then lower.
The present invention relates to a kind of process equipment of laser disordered texturing roller surface, include numerical control roll lathe 11, described roll 1 utilizes numerical control roll lathe 11 to make roll 1 under the overhead in opposite directions of lathe top 6, central axis round self does rotary motion at the uniform velocity, include pulse laser 4 and laser Machining head 2, described laser Machining head 2 is arranged on the upper slide rest of numerical control roll lathe 11, described laser Machining head 2 is connected with pulse laser phase 4 by optical fiber, described laser Machining head 2 is done axially at the uniform velocity to move along the side bus of roll 1, the helix of a zero lap track is gone out in roll 1 Surface Machining, on the axial direction of roll 1, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value.
It is that 5-300 turns that described machine tool chief axis drives the rotating speed of roll 1 to be rotating speed per minute.
Described laser Machining head 2 is equipped with range tracking element and roller diameter measurement mechanism, after being measured by roller diameter measurement mechanism, realizes auto-focusing.
Operationally, described laser Machining head 2 is arranged on the upper slide rest of numerical control roll lathe 11, the saddle of numerical control roll lathe 11 is done axially at the uniform velocity to move along the side bus of roll 4 with upper slide rest and laser Machining head 2, laser Machining head 2 is equipped with range tracking element, after being measured by roller diameter measurement mechanism, realize auto-focusing.
Described pulse laser 4 is connected with random signal generator 5, described random signal generator 5 controls the pulse laser beam 3 that laser instrument sends, make its random change frequency and dutycycle disorderly, thus after making to be focused on by focus lamp, the LASER SPECKLE that laser Machining head 2 processes, time but round dot, time and elliptical point, time but short point, time but long point, at roll 1 dot spacing circumferentially, Shi Erchang, time and short, spacing is also unordered, thus make the place that laser roughening is crossed on roll 1 become texturing " point ", the place excessively of non-texturing becomes " sky ", unordered texturing " point " and " sky " arrangement pattern out are also unordered.
Be 10 in the energy density of LASER SPECKLE
4-10
6w/cm
2time, gasify in top layer, bottom melts, and under the effect of centrifugal force and assist gas, forms micro-boss and pit, because the pattern of " point " is inconsistent, so the pattern of boss and pit is also inconsistent, boss and pit also inconsistent to the refraction of light.
As shown in Figure 1 and Figure 4, the present invention relates to a kind of embodiment of process equipment of laser disordered texturing roller surface, be made up of numerical control roll lathe 11, fiber pulse laser 4, cooling-water machine, random signal generator 5, laser Machining head 2, range tracking element, roller diameter checkout gear, control system, voltage stabilizing electricity etc.
The described Texturing Surface of Roll 1 that needs adopts centre bore to locate.With the head of a bed 7 and tailstock 10 two lathes top 6, the suitable power of roll 1 is held out against, and with chuck 8, the spindle nose of roll 1 is clamped.Clamping roll 1, under the drive of the turning moment of machine tool chief axis, in the range of speeds of lathe license, does the rotary motion of average rate.Rotating speed is 180-250 rev/min of scope.
Described laser Machining head 2 is arranged on lathe upper slide rest, under the transmission of Z axis leading screw or rack-and-pinion, the side bus along roll 1 is done axially at the uniform velocity to move, and laser Machining head 2 is equipped with range tracking element, after being measured by roller diameter measurement mechanism, realize auto-focusing; The translational speed of institute's art laser Machining head 2 should meet on the axial direction of roll 1, and the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value; , when the speed of mainshaft of numerical control roll lathe 11 is 250 revs/min, when LASER SPECKLE diameter is 0.08 millimeter, translational speed should 20 milli m/min near or be less than this value.
Described random signal generator 5, it can be arranged the upper and lower limit of controlled frequency; It send the aperiodic signal of telecommunication unordered at random, the pulse laser beam 3 that control impuls laser instrument 4 sends, makes its random frequency and dutycycle changing pulse laser beam 3 disorderly, thus makes " point " that formed at roll 1 upper surface by the focusing illumination of focus lamp, time but round dot, time and elliptical point, time but short point, time but long point, " point " spacing in roll circumference, Shi Erchang, time and short, spacing is also unordered.; The circumferential density of " point " be according to the linear velocity on rotary roller 1 surface and the pattern of required " point " set random signal generator 5 the frequency separation produced without sequential signal determine, the upper frequency limit of this routine random signal generator is set to 100KHz, lower limit arranges 10KHz, the power 200W of laser instrument.
As shown in Figures 2 and 3, described on roll 1 roll surface, the place that laser roughening is crossed is called texturing " point ", the place excessively of non-texturing is called " sky ", and unordered texturing " point " and " sky " arrangement pattern out are also unordered, even if strengthen laser roughening density, by whole for whole roll surface texturing, do not have " sky " left, the texturing " point " of its texturing is also unordered; Be 10 in the energy density of pulse laser spot
4~ 10
6w/cm
2time, gasify in top layer, bottom melts, and under the effect of centrifugal force and assist gas, forms micro-boss and pit, because the pattern of texturing " point " is inconsistent, so the pattern of boss and pit is also inconsistent, boss and pit also inconsistent to the refraction of light.By unordered texturing " point " and the arrangement of " sky " and the inconsistent of texturing " point " pattern, thus realize the laser disordered texturing on roll 1 surface.Due to the effect of boss, improve the steel transportation amount of Texturing Surface of Roll simultaneously.
By constantly testing and summing up, the texture structure obtained after the texturing of described roll 1 interface disorder and roughness, by following conditional decision: the linear velocity of 1 roller surface; The pitch of 2 laser Machining heads point along roll mandrel to texturing; 3 unordered signal generator operating frequency upper and lower limits; The watt level of 4 laser instruments..
By the statistical testing of business cycles of a large amount of experiments and every data, texture structure and the roughness of the roller surface of expection be expected, above-mentioned condition must be combined and do a large amount of experiments to obtain.
The above, be only the better possible embodiments of patent of the present invention, and be not used to the protection domain limiting patent of the present invention.
Claims (3)
1. the processing method of a laser disordered texturing roller surface, it is characterized in that, unordered pulse laser beam is produced with random signal generator control impuls laser instrument, after focusing, process the helix of a zero lap track at roller surface, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value; The stochastic variable that random signal generator sends followed by described pulse laser, the random dutycycle changing laser pulse bundle; The stochastic variable that random signal generator sends followed by described pulse laser, the pulse frequency that random change pulse laser sends, described pulse laser is optical fiber laser or YAG solid state laser or semiconductor laser or gas laser or liquid laser; The spacing of texturing " point " in the circumference of roll is changed by the random change of pulse duty factor and frequency, texturing " point " density in roll circumference is according to the linear velocity on rotary roller surface and the pattern of required texturing " point ", on random signal generator, setting is determined without the frequency separation of sequential signal, when the constant interval of frequency is wider, the topographical difference of texturing " point " is larger, when the constant interval of frequency is narrower, the topographical difference of texturing " point " is less; Frequency separation is narrower, and frequency band is higher, then texturing " point " density in roll circumference is then higher; Frequency separation is wider, and frequency band is lower, then texturing " point " density in roll circumference is then lower.
2. the process equipment of a laser disordered texturing roller surface, include numerical control roll lathe, described roll utilizes numerical control roll lathe to make roll under the overhead in opposite directions that lathe is top, central axis round self does rotary motion at the uniform velocity, it is characterized in that, include laser instrument and laser Machining head, described laser Machining head is arranged on the upper slide rest of numerical control roll lathe, described laser Machining head is done axially at the uniform velocity to move along the side bus of roll, the helix of a zero lap track is processed at roller surface, on the axial direction of roll, the helical pitch of described helix is less than 150% of LASER SPECKLE diameter value, the rotating speed of described machine tool chief axis is rotating speed per minute is that 5-300 turns, described laser Machining head is equipped with range tracking element and roller diameter measurement mechanism, after being measured by roller diameter measurement mechanism, realizes auto-focusing, random signal generator controls the pulse laser that laser instrument sends, make its random change frequency and dutycycle disorderly, thus after making to be focused on by focus lamp, the LASER SPECKLE that laser Machining head processes, time but round dot, time but elliptical point, time but short point, time but long point, dot spacing on roll circumference direction, Shi Erchang, time and short, spacing is also unordered, thus the place making laser roughening on roll cross becomes texturing " point ", the place of non-texturing becomes " sky ", unordered texturing " point " and " sky " arrangement pattern out are also unordered.
3. the process equipment of a kind of laser disordered texturing roller surface according to claim 2, is characterized in that: be 10 in the energy density of LASER SPECKLE
4~ 10
6w/cm
2time, gasify in top layer, bottom melts, and under the effect of centrifugal force and assist gas, forms micro-boss and pit, because the pattern of " point " is inconsistent, so the pattern of boss and pit is also inconsistent, boss and pit also inconsistent to the refraction of light.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104551407B (en) * | 2014-12-19 | 2016-07-06 | 武汉钢铁(集团)公司 | A kind of method in roller surface texturing and indicia patterns |
| 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 |
| CN113732064A (en) * | 2020-05-27 | 2021-12-03 | 宝山钢铁股份有限公司 | Roller with pit structure on surface and preparation method thereof |
| CN114952008A (en) * | 2022-05-12 | 2022-08-30 | 哈尔滨工业大学 | Laser disordered texturing method and texturing device |
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