CN202877726U - Solid laser texturing machining device - Google Patents
Solid laser texturing machining device Download PDFInfo
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- CN202877726U CN202877726U CN 201220467357 CN201220467357U CN202877726U CN 202877726 U CN202877726 U CN 202877726U CN 201220467357 CN201220467357 CN 201220467357 CN 201220467357 U CN201220467357 U CN 201220467357U CN 202877726 U CN202877726 U CN 202877726U
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Abstract
The utility model relates to a novel solid laser texturing machining device which solves the problems that an existing solid-state laser is limited in texturing roughness, production efficiency is low and pits formed in the surface of a roller has a low pit structure caused by low single pulse energy and low average power. The solid laser texturing machining device comprises a laser system and a texturing machine tool, wherein the laser system comprises a solid laser set and a reflector path system of the solid laser set. A beam expanding collimation system, a light guiding mechanism and a laser texturing focusing head are sequentially arranged on the reflector path system. The solid laser comprises a total reflection mirror, an output mirror and a continuous pumping unit. The continuous pumping unit is arranged in a resonant cavity which is formed by the total reflection mirror and the output mirror. An engine-driven mechanical chopper which is driven by a motor is further arranged between the continuous pumping unit and the output mirror. At least one light through hole is formed in the mechanical chopper. The novel solid laser texturing machining device not only can produce deeper texturing dots and deepen surface roughness, but also can acquire higher texturing frequency and texturing machining efficiency.
Description
Technical field
The utility model relates to a kind of laser processing device, and concrete is to say a kind of Solid State Laser rough processing device.
Background technology
Textured steel sheet has good punching performance and Coating performance, it is the important raw and processed materials of extensive use in automobile, household electrical appliances, electronics and the production in light industry, the key technology of textured steel sheet production is the roller surface texturing, and laser roller texturing technology is practical in several texturing technology (comprising shot-peening texturing, electric spark texturing and electron beam texturing) of using now and advanced a kind of texturing technology.
Laser roller texturing technology mainly is divided into two large classes at present: a class is to adopt the gas laser texturing of gas laser, for example CO
2Laser roughening, another kind of is the Solid State Laser texturing of adopting solid state laser, for example YAG laser roughening.
Solid state laser mainly comprises: YAG laser instrument, YVO
4Laser instrument, YLF Lasers device, LiSAF laser instrument etc.Compare with gas laser texturing technology with domestic and international electric spark, Solid State Laser texturing technology has the advantages such as texturing point distribution two dimension is controlled, equipment integrated level height, good stability, the equipment cost performance is high, it is generally applicable to be particularly suitable for medium and small steel mill, wherein, using is YAG laser roller texturing technology more widely.
It is several that the YAG laser instrument mainly contains Nd:YAG laser instrument, Yb:YAG laser instrument, Er:YAG laser instrument, Tm:YAG laser instrument etc., the basic principle of conventional solid laser roughening device is: adopt the YAG laser instrument of acousto-optic Q modulation as the pulse laser generating source, the pulse laser beam of being launched by laser instrument directly acts on processed roller surface and carries out texturing after light path system focuses on; By the rotating speed of control q-frequency and roll, realize that desired surface roughness and texturing hole distributes.For example: Inst. of Mechanics, CAS adopts the Nd:YAG laser instrument of acousto-optic Q modulation as light source for processing at " laser processing device with controlled distribution texturing point that is used for the surface of roller texturing " (patent No. ZL00264774.5) of the nineties research and development.
The advantage of conventional solid laser roughening device is: laser instrument is directly exported pulse laser, does not need outer optical path modulation, and utilization ratio of laser energy is high; Laser wave length (1.06 μ m), the roller surface laser absorption rate is high, brings equally high utilization ratio of laser energy.But its shortcoming is: although employed A-O Q-switch device has higher pulse frequency, its diffraction efficiency is limited; Therefore, when laser gain was very high, A-O Q-switch device can't provide sufficiently high loss that the vibration of laser instrument is effectively turn-offed.The above-mentioned restriction of A-O Q-switch device so that, the single pulse energy of acousto-optic Q modulation pulsed solid stale laser is lower, mean power is also low, thereby cause the texturing roughness limited, production efficiency is low, and particularly production efficiency is lower under higher roughness requires, and is difficult to satisfy the need of production of heavy steel rolling mill.
Another shortcoming of conventional solid laser roughening is acousto-optic Q modulation pulse very narrow (general standard acousto-optic Q modulation pulse width is 100-300ns), peak power very high (megawatt magnitude), so laser pulse reaches very high peak power density (10 after focusing on
7W/cm
2More than), roller surface directly is vaporized under high like this power density irradiation.Because pulse width is very narrow, so the result of laser pulses irradiate forms very shallow pit, facts have proved such bowl configurations and the roughness that is not suitable for when cold rolling shifts.
Desirable roller texturing pulse width should be in tens microsecond magnitudes, and the peak power of pulse is in a kilowatt magnitude.When shining roller surface after such pulse concentration, roller surface is melted, and the surface metal of fusing is blown the texturing hole by side-blown gas, forms a boss when result forms a pit.The hardness of this boss is very high, is particularly suitable for forming pit in surface of cold-rolled steel plate, and such pit is highly beneficial for lubricated oil storage.And with present Solid State Laser texturing device, can't process the texturing effect of above-mentioned requirements.
Summary of the invention
The purpose of this utility model is in order to address the above problem, provide a kind of simple in structure, reliability is high, can realize the Solid State Laser rough processing device of two or more train of pulse solid state laser parallel connections, described laser roughening processing unit (plant) not only can produce darker texturing point and surface roughness, and obtains higher texturing frequency and texturing process efficient.
Described laser system comprises solid state laser group and corresponding outside optical system, and described outside optical system is beam-expanding collimation system, light-guiding mechanism and the laser roughening focus head that sets gradually, and described solid state laser group is comprised of K solid state laser, K 〉=2; The laser roughening focus head has one at least.
Described solid state laser comprises total reflective mirror, outgoing mirror and is positioned at the continuous pump unit of the resonator of the two formation, it is characterized in that, also be provided with motor-driven mechanical chopper between described continuous pump unit and the outgoing mirror, have at least one light hole on the described mechanical chopper.
Described solid state laser is YAG solid state laser or other solid state lasers.
Any two solid state lasers in the described solid state laser group both can adopt same mechanical chopper to modulate, and also can adopt respectively two separate machine chopper wheels to modulate.
Described laser system all is installed on the planker of haired machine tool, or part is installed on the planker of haired machine tool.
Described light hole is with the otch of tapering or the through hole of other geometry.
The main operation principle of solid state laser is as follows in the utility model: in the process of machinery modulation disc spins, when the non-logical light position on it rotates on the laser beam axis, be equivalent to insert at laser beam axis the object of an obstructed light, thereby cause laser instrument to vibrate; If provide energy by continuous pump unit this moment, so will be in the solid excitable media of continuous pump unit accumulation energy gradually; Rotation along with mechanical chopper, when logical light position rotates on the laser beam axis, the obstructed smooth object that is equivalent to insert on the laser beam axis shifts out fast, form fast vibration under gain effect corresponding to laser instrument institute's stored energy in the solid excitable media, and realize the output of high-peak power short pulse.In the process of machinery modulation disc spins, non-logical light position and logical light position are alternately blocked and are passed through laser beam axis, so laser instrument is by periodic switching; If provide continuous laser energy by continuous pump unit this moment, laser instrument will be exported high repetition frequency, high-octane laser pulse so.
The Q modulator approach of solid state laser is particularly suitable for laser roughening in the utility model.This method can be turn-offed any high-power laser generation on the one hand, therefore can be fit to the high-average power laser pulse; The speed of opening by control laser on the other hand, thus the burst blocks Laser output obtained, forming the desirable laser pulse that is suitable for laser roughening, the pulsewidth of typical burst blocks laser is tens microsecond magnitudes, peak power is a kilowatt magnitude.
In the utility model, when the light hole on the described mechanical chopper during greater than, these logical light positions can be circumference and be equally distributed on the mechanical chopper, this moment is when the invariablenes turning speed of mechanical chopper, the time interval of adjacent laser pulse is on all four, and the repetition rate of laser instrument output pulse is constant.When described light hole during greater than, also can be the circumference non-equidistance is distributed on the mechanical chopper, even this moment mechanical chopper invariablenes turning speed, the pulse spacing of the adjacent pulse of laser instrument output also is inconsistent, i.e. the repetition rate of Laser output pulse is not constant.
The Solid State Laser rough processing device that the utility model provides is when concrete texturing process, and as the prior art, roll to be processed is by the roll rotating shaft on the haired machine tool and top clamping, and by roll rotating shaft driven rotary, its rotating speed is controlled by haired machine tool.Planker on the haired machine tool can be done the two-dimension translational motion, and its translational speed is controlled by haired machine tool.K(K in the solid state laser group 〉=2) the K road pulse laser beam of individual solid state laser output is through collimating and beam expanding system, light-guiding mechanism, behind the laser roughening focus head, focus on respectively simultaneously roller surface, and the enforcement texturing process of breaker roll surface, thereby process the texturing dot matrix that K bar helix distributes at roller surface.Under the centralized Control of the Q modulating frequency of haired machine tool breaker roll rotating speed, each solid state laser and planker translational speed, the focal spot that described each solid state laser is corresponding is processed to form helical scanning line lattice texturing hole at roller surface and distributes, can control by well-designed each optical element and to each solid state laser power output, Q modulating frequency simultaneously, thereby process the texturing hole degree of depth and the controlled texturing dot matrix distribution of texturing dot matrix shape at roller surface.
The utility model has the advantages that:
1. the utility model Solid State Laser rough processing device can adopt two or more solid state laser parallel operations, but the laser output power of each solid state laser, Q modulating frequency and burst blocks form are controlled by haired machine tool.And, when two or more solid state lasers are worked simultaneously, not only the power output of each solid state laser can be controlled according to actual needs, and their Q modulating frequency and burst blocks formal output can be controlled.Simultaneously, can make focal spot process needed texturing dot matrix at roller surface by well-designed outside optical system distributes.Two or more solid state lasers can significantly improve operating efficiency during with identical Laser output parallel operation.
2. the shutoff of the utility model solid state laser is owing to be to realize by the non-logical light position of mechanical chopper, in fact just be equal to when laser is turned off and directly inserted a mechanical switch in laser instrument, therefore corresponding turn-off capacity almost is unlimited.This shutoff mode without any restriction, goes for superpower laser to laser power, thereby forms sufficiently high laser pulse power and pulse frequency.
3. the utility model solid state laser not only has the high repetitive frequency pulsed output the same with the acousto-optic pulse tuning Q laser, and can produce simultaneously with tilting mirror and transfer Q, electric-optically Q-switched and high-peak power giant-pulse output that dye Q isopulse laser instrument is the same.Moreover, this burst blocks Q modulated laser has solved the intrinsic difficulty of present acousto-optic Q-switched pulse laser when realizing that high stable, high repetition frequency, high-peak power and high pulse energy laser pulse are exported.In sum, the utility model is high by the stability that burst blocks Q modulated laser provides, repetition rate is high, peak power is high and pulse energy is high and the short pulse laser output of pulsewidth, can process the more roller class material of deep thickness, darker texturing point and surface roughness be can produce when being applied to laser roughening, higher texturing frequency and texturing process efficient obtained.
4. the Q-switch of each solid state laser belongs to slow switch in the utility model solid state laser group, its output Q comprises the burst blocks that is comprised of a succession of small-pulse effect in modulation period, therefore Laser output pulse energy height and peak power does not have acousto-optic Q modulation and electric-optically Q-switched so high, therefore be very beneficial for forming some small molten baths at roller surface, thereby overcome acousto-optic Q modulation and electric-optically Q-switched too high and the shortcoming that roller surface is gasified of Laser output pulse peak power that waits.
5. the utility model solid state laser group overall structure is simple, and volume is little, can be positioned over easily on the two-dimensional movement planker of haired machine tool, so the solid state laser parallel system is largely simplified.
6. the utility model Solid State Laser rough processing device overall structure is simple, and cost is low, and working (machining) efficiency is high, long service life, and working stability, production maintenance is easy, is highly suitable for industrial production and uses.
Description of drawings
Fig. 1 is Solid State Laser rough processing device integral outer structural representation;
Fig. 2 is two luminous point (a Laser Focusing texturing head, two solid state lasers) the laser roughening machining sketch charts of the single head of two solid state laser parallel connections;
Fig. 3 is the structure principle chart of the solid state laser group (solid state laser shares a mechanical chopper) of the utility model embodiment 1;
Fig. 4 is the structure principle chart of the solid state laser group (solid state laser is a private mechanical chopper separately) of the utility model embodiment 2;
Fig. 5 is mechanical chopper 104 schematic diagrames, and wherein the light hole 106 of Fig. 5 a is the circular hole with tapering, and Fig. 5 b is the A-A profile of Fig. 5 a; The light hole 106 of Fig. 5 c is the otch with tapering, and Fig. 5 d is the B-B profile of Fig. 5 c.
Fig. 6 is the burst blocks output map of solid state laser Q modulation in the utility model;
Fig. 7 is the texturing hole distribution schematic diagram that produces at roller surface when the solid state laser group is provided with two solid state laser parallel operations in the utility model.
Wherein, 1-solid state laser group, the 111-total reflective mirror, the 121-total reflective mirror, the continuous pump unit of 112-, the continuous pump unit of 122-, the 103-high-speed electric expreess locomotive, the 113-high-speed electric expreess locomotive, the 123-high-speed electric expreess locomotive, the 104-mechanical chopper, the 114-mechanical chopper, the 124-mechanical chopper, the 115-outgoing mirror, the 125-outgoing mirror, the 106-light hole, the 116-light hole, the 126-light hole, the 201-beam-expanding collimation system, the 202-beam-expanding collimation system, the 301-light-guiding mechanism, the 302-light-guiding mechanism, 5-laser roughening focus head, the 6-roll, the 7-haired machine tool, the rotating shaft of 701-roll, 702-is top, the 703-planker.
The specific embodiment
Embodiment 1: such as Fig. 1, in the utility model laser roughening processing unit (plant), comprise laser system and haired machine tool 7, the planker 703 that drives by the translation guide rail and the roll rotating shaft 701 and top 702 that is used for installing roll 6 are housed on the lathe bed of described haired machine tool 7; Described laser system is installed on the planker 703, comprise that solid state laser group 1(is provided with two solid state lasers), light-guiding mechanism 301,302, beam-expanding collimation system 201,202 and laser roughening focus head 5, solid state laser group 1 output two bundle of pulsed laser in the present embodiment, and only have a laser roughening focus head 5, the structure chart of laser system is as shown in Figure 2.
Solid state laser is the YAG laser instrument in the present embodiment.
Referring to Fig. 3, a YAG laser instrument in the solid state laser group 1 comprises the total reflective mirror 111 that sets gradually, mechanical chopper 104 and the outgoing mirror 115 of continuously pump unit 112, high-speed electric expreess locomotive 103 drivings; Another YAG laser instrument comprises mechanical chopper 104 and the outgoing mirror 125 of total reflective mirror 122, continuously pump unit 122, high-speed electric expreess locomotive 103 drivings.Described in the present embodiment continuously pump unit 112,122 all adopt the semiconductor light pump unit, described mechanical chopper 104 is made by aluminum; Mechanical chopper 104 places continuous pump unit 112(122) and outgoing mirror 115(125) between.The rotating shaft of mechanical chopper 104 is positioned at continuous pump unit 112(122) the laser beam axis top of output, and link to each other with the output shaft of high-speed electric expreess locomotive 103, thereby can be under the drive of high-speed electric expreess locomotive 103 High Rotation Speed, be circularly and evenly distributed with the otch of tapering and be four at the light hole 106 that mechanical chopper 104 is offered, its tapering is that 1:2(is referring to Fig. 5 c and Fig. 5 d, in addition, also can be the circular light hole 106 with tapering, referring to Fig. 5 a and Fig. 5 b), these four light holes 106 can replace by the rotation of mechanical chopper 104 for the laser beam axis in the two YAG laser instruments and pass through.Sum up: two YAG laser instruments share a mechanical chopper 104 in the present embodiment, and other assembly except mechanical chopper 104 and high-speed electric expreess locomotive 103 then has a cover separately.As long as mechanical chopper 104 is enough large, can set up on this basis in theory N YAG laser instrument and corresponding N group outside optical system, N 〉=1.Thereby realize output two bundles or the above pulse laser beam of two bundles, more save the space on the structure fabric, to dwindle the volume of YAG laser instrument.
Embodiment 2: referring to Fig. 4, as different from Example 1: first comprises the total reflective mirror 111 that sets gradually, mechanical chopper 114 and the outgoing mirror 115 of continuously pump unit 112, high-speed electric expreess locomotive 113 drivings in two YAG laser instruments; Second mechanical chopper 124 and outgoing mirror 125 that comprises total reflective mirror 122, continuously pump unit 122, high-speed electric expreess locomotive 123 drivings, each mechanical chopper 114(or 124) the light hole 116(or 126 that offers on) is four taper otch that are circularly and evenly distributed, its tapering is 1:4, and these four logical light cone shapes are cut the hole can be by mechanical chopper 114(124) rotation replace for the laser beam axis in each self-corresponding YAG laser instrument and pass through.Sum up: two YAG laser instruments of solid state laser group setting are furnished with mechanical chopper 114(or 124 separately in the present embodiment),, cloth low in designing requirement is set up more simple and flexible, can set up on this basis N YAG laser instrument and corresponding N group outside optical system (N 〉=1).Thereby realize output two bundles or the above pulse laser beam of two bundles.
Shown in Figure 6 is burst blocks YAG Q-switched laser burst blocks output marshalling figure in the utility model, and a YAG laser instrument is set as example take solid state laser group 1: haired machine tool 7 is controlled the string group output of laser Q modulating frequency, Q modulation depth and pulse by the rotating speed of control high-speed electric expreess locomotive 103; Described burst blocks form for the laser in modulation period T by the Q modulation be compressed in output in the time Δ t (Δ t＜＜T), output time Δ t inner laser forms output with a succession of small-pulse effect.That give among the figure is the Laser output figure that each burst blocks comprises 3 small-pulse effects.The shape of different small-pulse effects and the power concrete control by the rotary speed of high-speed electric expreess locomotive 103 control mechanical choppers 104 in the described burst blocks.The power output of YAG laser instrument, Q modulating frequency, Q modulation depth and burst blocks output are by according to actual needs and in real time control of haired machine tool.
The course of work: as shown in Figure 1, when concrete texturing process, as the prior art, roll 6 to be processed is by the roll rotating shaft 701 on the haired machine tool 7 and top 702 clampings, and by roll rotating shaft 701 driven rotary, its rotating speed is by haired machine tool 7 controls.Planker 703 on the haired machine tool 7 can be done the two-dimension translational motion, and its translational speed is by haired machine tool 7 controls; Simultaneously, haired machine tool can be controlled solid state laser group 1 interior two YAG laser instruments Q modulating frequency, Q modulation depth and burst blocks form separately.Described haired machine tool 7 adopts existing equipment, for example XL9 type numerically controlled lathe.The two bundle of pulsed laser bundle that solid state laser group 1 is sent is respectively hung oneself behind beam-expanding collimation system 201,202 beam-expanding collimations, pass through again light-guiding mechanism 301,302, then focus on roller surface by laser roughening focus head 5 and form 2 very little focal spots, and then texturing process is implemented on the surface of breaker roll 6.At haired machine tool 7 breaker rolls 6 rotating speeds, under the centralized Control of mechanical chopper 104 rotating speeds and planker 703 positions and point-to-point speed, described focal spot distributes at the texturing dot matrix that roll 6 Surface Machining form 2 linear formulas of helical scanning, specifically in conjunction with shown in Figure 7, laser instrument is respectively b at vertical dot spacing of the helical scanning line lattice of roller surface, b ', mainly be that the q-frequency of controlling respectively the roll speed of mainshaft and laser instrument according to the requirement of roll 6 surface roughnesses can get, wherein b ' is the texturing point longitudinal pitch of same focal spot processing, b is the texturing point longitudinal pitch of different focal spot processing, has generally speaking: b, b '=50-500 μ m; The two bundle of pulsed laser bundle that laser instrument sends is △ X through two helixes (different focal spot generation) horizontal spacing that laser roughening focus head 5 focuses on the roller surface generation, and helical scanning line (same focal spot generation) pitch is △ X ', △ X and △ X ' can control according to the requirement of actual roll surface roughness in the real system, △ X=50-500 μ m generally, △ X '=100-1000 μ m
Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the Spirit Essence of the utility model main technical schemes all should be encompassed within the protection domain of the present utility model.
Claims (4)
1. Solid State Laser rough processing device, comprise laser system and haired machine tool, it is characterized in that, described laser system comprises solid state laser group and corresponding outside optical system, described solid state laser group is comprised of K solid state laser, K 〉=2, described outside optical system are beam-expanding collimation system, light-guiding mechanism and the laser roughening focus head that sets gradually.
2. Solid State Laser rough processing device as claimed in claim 1, it is characterized in that, described solid state laser comprises total reflective mirror, outgoing mirror and is positioned at the continuous pump unit of the resonator of the two formation, also be provided with motor-driven mechanical chopper between described continuous pump unit and the outgoing mirror, have at least one light hole on the described mechanical chopper.
3. Solid State Laser rough processing device as claimed in claim 1 or 2, it is characterized in that, any two solid state lasers in the described solid state laser group both can share same mechanical chopper and carry out the Q modulation, also can adopt respectively two separate machine chopper wheels to carry out the Q modulation.
4. Solid State Laser rough processing device as claimed in claim 1 is characterized in that, the laser roughening focus head has one at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220467357 CN202877726U (en) | 2012-09-14 | 2012-09-14 | Solid laser texturing machining device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220467357 CN202877726U (en) | 2012-09-14 | 2012-09-14 | Solid laser texturing machining device |
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| CN202877726U true CN202877726U (en) | 2013-04-17 |
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| CN 201220467357 Expired - Fee Related CN202877726U (en) | 2012-09-14 | 2012-09-14 | Solid laser texturing machining device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551387A (en) * | 2014-12-23 | 2015-04-29 | 中国科学院力学研究所 | Multi-beam synthesizing and focusing device |
| CN104625397A (en) * | 2014-12-23 | 2015-05-20 | 中国科学院力学研究所 | Multi-beam photosynthesis focusing control system and method |
| CN106425085A (en) * | 2016-10-13 | 2017-02-22 | 武汉市凯瑞迪激光技术有限公司 | Laser roughening machining device |
| 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 |
-
2012
- 2012-09-14 CN CN 201220467357 patent/CN202877726U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104551387A (en) * | 2014-12-23 | 2015-04-29 | 中国科学院力学研究所 | Multi-beam synthesizing and focusing device |
| CN104625397A (en) * | 2014-12-23 | 2015-05-20 | 中国科学院力学研究所 | Multi-beam photosynthesis focusing control system and method |
| CN104551387B (en) * | 2014-12-23 | 2016-08-24 | 中国科学院力学研究所 | Multi-beam synthetic focusing device |
| CN106425085A (en) * | 2016-10-13 | 2017-02-22 | 武汉市凯瑞迪激光技术有限公司 | Laser roughening machining device |
| 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 |
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