CN1789439A - High frequency pulse laser induced electrode directional discharging apparatus for roughing roller surface - Google Patents
High frequency pulse laser induced electrode directional discharging apparatus for roughing roller surface Download PDFInfo
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- CN1789439A CN1789439A CN 200510132765 CN200510132765A CN1789439A CN 1789439 A CN1789439 A CN 1789439A CN 200510132765 CN200510132765 CN 200510132765 CN 200510132765 A CN200510132765 A CN 200510132765A CN 1789439 A CN1789439 A CN 1789439A
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Abstract
The invention discloses the roller surface high-frequency impulse laser induced directional discharging hair device, comprising impulsing power source, high frequency pulse laser generator, discharged electrode and control device. The device comprises the following characteristics: the bipolar of impulsing power source connected with roller and discharged electrode, the discharged electrode placed on the laser focal point of laser generator, the control device controlling the impulsing power source and high frequency pulse laser generator. The device has good directionality, high working frequency, big power, and good hair controllability and homogeneity.
Description
Technical field
The present invention relates to a kind of film forming system of metallic substance.
Background technology
Fine Cold Rolled Sheet Steel surface requirements has certain roughness pattern, with processability and the coating performance of improving steel plate.Production high-quality cold rolled sheet at first will carry out texturing appearance to the operation roll of mill surface, and milling train uses the texturing roll to roll out the cold rolling texturing thin plate of required roughness pattern then.At present, the texturing technology of roll comprises shot-peening texturing (SBT), electrical spark texturing (EDT), laser roughening (LT) and electron beam texturing (EBT), the shot-peening texturing is with pressurized air hard steel sand high-velocity jet to be arrived roller surface, relies on the kinetic energy impact of steel sand to make the roller surface viscous deformation and change surface topography; The electrical spark texturing is to use many counter electrode, breaker roll surface-discharge consolidation appearance in dielectric medium fluid; The laser roughening technology is divided into two kinds again, CO
2Laser roughening is to adopt the laser beam of the mechanical chopper blocking-up focusing of high speed rotating to form pulse laser, and the consolidation texturing is carried out on the breaker roll surface.The YAG laser roughening is by the gain in the sound one smooth Q-switch control laser cavity, realizes texturing thereby form high repeat frequency pulsed laser bundle breaker roll surface, as the patent application of the applicant proposition in 1992; The electron beam texturing is to produce electron beam with electron beam gun, focuses on through magnetic lens roll surface is carried out texturing, and texturing system and roll must be processed under vacuum environment.Above roughing method is from the rough morphology of roller surface texturing, its surface topography is divided into two classes again: stochastic distribution texturing and controlled distribution texturing, shot-peening texturing and electrical spark texturing belong to uncontrollable stochastic distribution texturing, and laser roughening and electron beam texturing belong to the controlled distribution texturing.
The stochastic distribution texturing of roll, be to clash into roll surface repeatedly or in medium oil, form to the consolidation of roll surface multiple discharge repeatedly by many counter electrode by high-velocity jet sand ball, because the texturing process is uncontrollable, the effect strengthening point of roll surface often has overlapping, and the roughness homogeneity is relatively poor, and has a large amount of minute grooves that are communicated with between the strengthening point, be unfavorable for the storage of lubricating oil under the force-bearing situation, liquid, when plate forming, be unfavorable for that material deformation flows, and has influenced deep drawability to a certain extent.
Adopt the controlled texturing on laser beam and electron beam breaker roll surface, because laser and very aerial electron beam all are rectilinear propagation, directivity is splendid, under computer control, the active position of each texturing point on roll surface can accurately be controlled, so the good uniformity of texturing roughness.Simultaneously, texturing point exists for uniform isolated little hole, and lubricated difficult loss of each little hole oil storage can effectively be reduced frictional coefficient when sheet material forming, improve deep-draw and coating performance.Therefore when Development and Production high quality cold-rolled thin sheet paper tinsel, controlled distribution texturing technology more and more demonstrates advantage.But the controlled distribution texturing all is to adopt single beam (or electron beam) texturing, and its texturing speed is not so good as the shot-peening texturing and electrical spark texturing (often adopting many counter electrode discharges) is fast.The necessary sound of particularly solid-state YAG laser roughening modulation high repetition frequency one smooth Q-switch is limited by driving power, and difficulty further improves the laser roughening laser power, to satisfy the more needs of high speed texturing and high roughness texturing of roll.
Summary of the invention
The object of the present invention is to provide the texturing device of the roller surface high recurrent frequency pulse laser induction electrode directional discharge that a kind of speed is fast, directive property good, operating frequency is high, power is big, the homogeneity controllability of texturing distribution is good.
For achieving the above object, technical solution of the present invention is:
A kind of texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge, this device comprises the pulse power, high recurrent frequency pulse laser producer, discharge electrode, control device, the two poles of the earth of the described pulse power connect described roll to be processed and discharge electrode respectively, described discharge electrode is arranged at the laser spot place near described laser generator, and leave spacing between described discharge electrode and the roll to be processed, described control device is controlled the work of the described pulse power and described high recurrent frequency pulse laser producer.
Further, described high recurrent frequency pulse laser producer comprises acousto-optic drive power, laser apparatus, speculum, the condenser lens that connects successively, and described acousto-optic drive power is connected with described control device.
Further, described laser apparatus is the YAG laser apparatus of sound-optical accent Q.
Further, the described pulse power is for discharging and recharging power supply, and this discharges and recharges electric power loop is that a high tension loop and a low tension loop are formed in parallel.
Further, described pulse power negative pole connects described discharge electrode, the described roll to be processed of anodal connection.
Further, described discharge electrode is a needle electrode.
Further, described discharge electrode is a rotating electrode, and this rotating electrode comprises disk electrode and the drive unit that is connected with disk electrode, and described disk electrode arc edge section is an angular shape.
Further, described wedge angle is the 20-30 degree.
Further, be coated with the optical coating that can make visible light transmissive on the described speculum, be provided with stylus below described speculum, this stylus connects described control device.
Further, this device also comprises the roll clamping device, this roll clamping device comprises turning axle, guide rail, slide carriage, turning axle is fixed in guide rail one end, slide carriage is complementary with guide rail and can slides by relative guide rail, described speculum, condenser lens, discharge electrode all are fixed on the slide carriage, and roll to be processed is fixed on the turning axle.
After adopting said structure, because this roller surface texturing device comprises the pulse power, high recurrent frequency pulse laser generating unit, discharge electrode and control device, control device control under, the pulse laser beam of pulse laser generating unit output focuses on the roll surface of roll to be processed, make and produce plasma plume on the roll surface, the induced discharge electrode discharges to roller surface to be processed, forms the consolidation spot.The directive property that the present invention has kept laser is good, texturing distribution and the homogeneity controllability is good, operating frequency is high, the advantage that can improve as required with the discharge power of discharge power supply, therefore this device has reached the effect that texturing power is big, frequency is high, overcome simultaneously the problem of poor controllability again, and simple YAG laser roughening effciency of energy transfer is low, power is difficult to shortcomings such as raising.Experiment shows that roll surface roughness Ra is difficult to reach 5.0 μ m after independent laser roughening, the electrical spark texturing, and high repetition YAG induced with laser directional discharge roughing method of the present invention can make roll surface texturing roughness Ra controlled at 1.5-14.0 μ m on a large scale.In addition, include speculum in the described high recurrent frequency pulse laser producer, below speculum, be provided with the CCD stylus, the CCD stylus connects control device, therefore the CCD stylus is with the image input computer of the roller surface that collects, but the shape characteristic on breaker roll surface shows observation, also can be used for simultaneously observing regulating the position of condenser lens with respect to the roll roll surface, makes whole texturing process more controlled; After discharge electrode adopts rotating electrode, in the high recurrent frequency pulse laser induction discharge process, because the not stall of disk is moving, each discharge process is on the difference of disk border, this has just reduced the overheated ablation phenomen of the eletrode tip that continuous discharge causes greatly, in addition, replace the tip of needle electrode with the circumference of disk, electrode discharge o'clock is expanded on the whole circumference line by a point, be equivalent to increase number of electrodes, reduced the heat accumulative total on the electrode, simultaneously, because disk thermal capacity is big, the rotation of disk makes heat radiation accelerate again, thereby significantly improve the work-ing life of discharge electrode, make roller texturing more even.In addition, discharging and recharging electric power loop is that a high tension loop and a low tension loop are formed in parallel, and high tension loop has guaranteed that two inter-electrode voltages are enough high, and induced discharge punctures, and low tension loop then provides and punctures the required big electric current in back.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the circuit structure diagram of the pulse power of the present invention;
The design sketch of the consolidation spot that Fig. 3 A obtains during for positive discharge;
The design sketch of the consolidation spot that Fig. 3 B obtains during for negative discharge;
Fig. 4 A is the roll surface figure that simple YAG laser roughening obtains under the atmospheric environment;
Fig. 4 B is the roll surface figure that texturing of the present invention obtains under the atmospheric environment;
Fig. 5 is the structural representation of rotating electrode.
Embodiment:
As shown in Figure 1, a kind of texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge, this device comprise the pulse power 1, high recurrent frequency pulse laser producer 2, discharge electrode 3, control device 4 and roll to be processed 5, roll clamping device 6;
The pulse power 1 is the fast charging and discharging power supply, negative pole connects discharge electrode 3, anodal connection roll 5 to be processed, leave the spacing that is not more than 1mm between discharge electrode 3 and the roll to be processed 5, be full of air in this spacing, voltage breakdown between discharge electrode 3 and the roll to be processed 5 is more than 3000 volts, and the pulse voltage across poles of the pulse power 1 is up to 500 volts, thereby guarantees not disruptive discharge automatically between discharge electrode 3 and the roll to be processed 5.Described discharge electrode 3 is a needle electrode.
The pulse power 1 is the fast charging and discharging power supply, its circuit structure as shown in Figure 2, for guaranteeing the reliable induced discharge of laser energy under high repetition working condition, this discharges and recharges electric power loop is that a high tension loop and a low tension loop are formed in parallel, the effect of high tension loop is easily to make induced discharge puncture between two electrodes, low tension loop then provides and punctures the required big electric current in back, among Fig. 2, m, n is an input terminus behind the two-phase power supply lower pressure rectifier, input voltage is the 100-500 volt, p, q is an input terminus behind the two-phase electricity high-voltage rectifying, input voltage is the 300-1000 volt, C1, IGBT1, R1 connects mutually and constitutes the low pressure charge circuit to capacitor C 2 chargings, and C2 passes through IGBT2, under the induced with laser situation, through discharge electrode to roll 5 surface-discharges to be processed.C4, IGBT4, R2 connect mutually and constitute the high-voltage charging loop to capacitor C 3 chargings, and C3, discharges to roller surface to be processed through discharge electrode under the induced with laser situation by IGBT3.D3 is an isolating diode, and D1 is a fly-wheel diode, and R1 is a current-limiting resistance.Control module IGBT1, IGBT2, IGBT3, IGBT4 connect control device 4 respectively, trigger open-minded by control device 4 controls, service time has determined that the discharge pulse width can be adjustable in 10 microseconds-1 millisecond scope, since IGBT can 20KHZ frequency to capacitor C 2, C3 charging, therefore can satisfy the high repetition frequency job requirement.
High recurrent frequency pulse laser producer 2 comprises the acousto-optic drive power 21 that connects successively, YAG laser apparatus 22, speculum 23, the condenser lens 24 of sound-optical accent Q; Discharge electrode 3 is located at the place, focal position near condenser lens 24.
In the present embodiment, control device 4 adopts computer, and an end of computer connects acousto-optic drive power 21, YAG laser apparatus 22 successively, under computer control, acousto-optic drive power 21 makes laser apparatus 22 send the high repetition frequency laser pulse for the acoustooptic switch of 22 li in laser apparatus provides switch signal; The output terminal downstream of laser apparatus 22 is provided with speculum 23, condenser lens 24 successively, speculum 23 is a completely reflecting mirror, the pulse laser beam of the wavelength 1.06 μ m of laser apparatus 4 outputs is after completely reflecting mirror 23 reflections, focus on by condenser lens 24 on the roll surface of roll 5 to be processed, make illuminated position generation plasma plume 7 on the roll surface, plasma plume 7 plays the effect of induced discharge switch; In addition, also be coated with optical coating on the speculum 23, can make the light transmission of visible wavelength, below speculum 23, be provided with CCD stylus 8, CCD stylus 8 connects computer, therefore CCD stylus 8 is the image input computer of the roller surface that collects, but the shape characteristic on breaker roll surface shows observation, also can be used for simultaneously observing regulating the position of condenser lens 24 with respect to the roll roll surface; The other end of computer connects the pulse power 1, the fast charging and discharging process of control power supply 1;
After thousands of times of the discharge electrode discharge, eletrode tip will be because of the overheated serious distortion of ablating, so that can't carry out laser induced discharge effectively, for avoiding this situation, discharge electrode 3 adopts rotating electrode as shown in Figure 5, comprise disk electrode 31, turning axle 32, electric motor 34, described disk electrode 31 is the disk of the about 100-160mm of a diameter, thick 5-10mm, and disk electrode arc edge section is the angular shape of 20-30 degree.Described disk electrode 31 is processed by the conductive metallic material of steel, copper and alloy thereof or other anti-ablation, the center drilling of disk electrode 31, be installed on the turning axle 32 by this hole, closely cooperate with turning axle 32, turning axle 32 is made by conductive metallic material, one end is equipped with trough belt wheel 35, disk electrode 31, turning axle 32, electric motor 34, belt pulley 35 are installed on the support 36 that insulating material makes by bearing, electric motor 34 drives disk electrode 31 rotations by the pulley belt on the belt pulley 35 37, and the rotating speed of disk electrode 31 can be regulated and control by power supply; The other end of turning axle 32 connects a brush plate 38, brush plate 38 is installed on the support 6, brush plate 38 is used for being connected with the pulse power 1, brush plate 38, turning axle 32, disk electrode 31 are formed the output stage that conductive channel connects the pulse power 1, and another output stage of the pulse power 1 connects roll 5 to be processed, keeps minim gap between the edge of disk electrode 31 and the roll to be processed 5.
In addition, turning axle 32 also can connect electric motor 34 by other transmission mechanism, drives disk electrode 31 rotations by electric motor 34.
Roll clamping device 6 is a machining tool, lathe comprises turning axle 61, guide rail 62, slide carriage 63, turning axle 61 is fixed in guide rail 62 1 ends, slide carriage 63 is complementary with guide rail 62, and can slide along guide rail, described speculum 23, condenser lens 24, discharge electrode 3 all is fixed on the slide carriage 63, roll 5 to be processed is fixed on the turning axle 61, can be with turning axle 61 rotations, and speculum 23, condenser lens 24, discharge electrode 3 all is fixed on the slide carriage 63, by the axis translation of slide carriage 63, at the rotation and the condenser lens 24 of roll 5 to be processed with respect to roll 5 to be processed, under the translational movement of discharge electrode 3, finish the processing for the treatment of processing roll 5 surfaces.
When under atmospheric environment, discharging between discharge electrode and the roller surface, prolongation along with the discharge current pulse width, the discharge channel diameter will expand owing to heat effect, cause roller surface consolidation spot diameter to become big, the slickness variation of profile, for reducing this influence, in apparatus of the present invention, adopt negative discharge, even discharge electrode 3 connects the negative pole of the pulse power 1, roll 5 to be processed connects positive source, the design sketch of the consolidation spot that Fig. 3 A obtains when being depicted as positive discharge, the design sketch of the consolidation spot that Fig. 3 B obtains when being depicted as negative discharge.
Fig. 4 A, 4B have shown respectively under atmospheric environment, the roll surface figure that simple YAG laser roughening and the texturing of the high repetition YAG of the present invention induced with laser directional discharge obtain.Under same laser parameter condition, the surface roughness Ra=2.0 μ m of simple laser roughening, and the surface roughness Ra=10 μ m of high Repetition Frequency Laser induced orientation discharge texturing.
Technologies such as said apparatus not only can be used for the roller surface texturing, is applied to iron and steel, nonferrous metallurgy cold rolled sheet, also can be applicable to working conditions abominable hot roll surface texturing, reinforcement, also can be used in group's hole processing, welding, thermal treatment or other process for treating surface of metal.
Claims (10)
1, a kind of texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge, it is characterized in that: this device comprises the pulse power, high recurrent frequency pulse laser producer, discharge electrode, control device, the two poles of the earth of the described pulse power connect described roll to be processed and discharge electrode respectively, described discharge electrode is arranged at the laser spot place near described laser generator, and leave spacing between described discharge electrode and the roll to be processed, described control device is controlled the work of the described pulse power and described high recurrent frequency pulse laser producer.
2, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 1, it is characterized in that: described high recurrent frequency pulse laser producer comprises acousto-optic drive power, laser apparatus, speculum, the condenser lens that connects successively, and described acousto-optic drive power is connected with described control device.
3, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 2 is characterized in that: described laser apparatus is the YAG laser apparatus of sound-optical accent Q.
4, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 1 is characterized in that: the described pulse power is for discharging and recharging power supply, and this discharges and recharges electric power loop is that a high tension loop and a low tension loop are formed in parallel.
5, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 1 is characterized in that: described pulse power negative pole connects described discharge electrode, the described roll to be processed of anodal connection.
6, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 1 is characterized in that: described discharge electrode is a needle electrode.
7, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 1, it is characterized in that: described discharge electrode is a rotating electrode, this rotating electrode comprises disk electrode and the drive unit that is connected with disk electrode, and described disk electrode arc edge section is an angular shape.
8, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 7 is characterized in that: described wedge angle is the 20-30 degree.
9, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 2, it is characterized in that: be coated with the optical coating that can make visible light transmissive on the described speculum, be provided with stylus below described speculum, this stylus connects described control device.
10, the texturing device of roller surface high recurrent frequency pulse laser induction electrode directional discharge as claimed in claim 2, it is characterized in that: this device also comprises the roll clamping device, this roll clamping device comprises turning axle, guide rail, slide carriage, turning axle is fixed in guide rail one end, slide carriage is complementary with guide rail and can slides by relative guide rail, described speculum, condenser lens, discharge electrode all are fixed on the slide carriage, and roll to be processed is fixed on the turning axle.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101327651A CN1311945C (en) | 2005-12-26 | 2005-12-26 | High frequency pulse laser induced electrode directional discharging apparatus for roughing roller surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101327651A CN1311945C (en) | 2005-12-26 | 2005-12-26 | High frequency pulse laser induced electrode directional discharging apparatus for roughing roller surface |
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| CN1789439A true CN1789439A (en) | 2006-06-21 |
| CN1311945C CN1311945C (en) | 2007-04-25 |
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Cited By (7)
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| CN101966626A (en) * | 2010-09-01 | 2011-02-09 | 王荫森 | Electric spray machine for roughening grinding roller |
| CN102035126A (en) * | 2010-11-10 | 2011-04-27 | 中国科学院力学研究所 | All-solid-state laser for laser texturing of metal |
| CN102131607A (en) * | 2008-08-04 | 2011-07-20 | 沙克拉德有限责任公司 | Method and apparatus for improving roll texturing using electrical discharge machines |
| CN103192147A (en) * | 2013-03-22 | 2013-07-10 | 中国科学院力学研究所 | Mobile laser focus-induced pulse micro arc discharge method and application thereof |
| CN103419137A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Roller surface strengthening and roughness controlling method |
| CN104625255A (en) * | 2014-12-12 | 2015-05-20 | 武汉宝德机电股份有限公司 | All-digital control steel roller electric spark texturing test method and device |
| CN108927595A (en) * | 2017-05-24 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of reconditioning and fulguration system of processing for line cutting electrode wheel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2209008Y (en) * | 1994-09-10 | 1995-10-04 | 中国科学院力学研究所 | Laser working equipment for roller surface roughening |
| CN2413812Y (en) * | 1999-12-27 | 2001-01-10 | 林子光 | Laser roughened fishnet roller |
| CN1151907C (en) * | 2000-12-13 | 2004-06-02 | 中国科学院力学研究所 | Roller surface roughening laser processing system to form controllable distributed roughened spots |
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2005
- 2005-12-26 CN CNB2005101327651A patent/CN1311945C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102131607A (en) * | 2008-08-04 | 2011-07-20 | 沙克拉德有限责任公司 | Method and apparatus for improving roll texturing using electrical discharge machines |
| CN102131607B (en) * | 2008-08-04 | 2015-09-02 | 沙克拉德有限责任公司 | Electrical discharge machine is used to improve the method and apparatus of roller texturing |
| CN101966626A (en) * | 2010-09-01 | 2011-02-09 | 王荫森 | Electric spray machine for roughening grinding roller |
| CN102035126A (en) * | 2010-11-10 | 2011-04-27 | 中国科学院力学研究所 | All-solid-state laser for laser texturing of metal |
| CN103419137A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Roller surface strengthening and roughness controlling method |
| CN103419137B (en) * | 2012-05-25 | 2015-10-28 | 宝山钢铁股份有限公司 | A kind of roller surface hardening and roughness control method |
| CN103192147A (en) * | 2013-03-22 | 2013-07-10 | 中国科学院力学研究所 | Mobile laser focus-induced pulse micro arc discharge method and application thereof |
| CN103192147B (en) * | 2013-03-22 | 2015-08-19 | 中国科学院力学研究所 | The pulse micro arc discharge method of mobile laser spot induction |
| CN104625255A (en) * | 2014-12-12 | 2015-05-20 | 武汉宝德机电股份有限公司 | All-digital control steel roller electric spark texturing test method and device |
| CN108927595A (en) * | 2017-05-24 | 2018-12-04 | 宝山钢铁股份有限公司 | A kind of reconditioning and fulguration system of processing for line cutting electrode wheel |
| CN108927595B (en) * | 2017-05-24 | 2020-09-25 | 宝山钢铁股份有限公司 | Grinding and electrocautery processing system for wire cutting electrode wheel |
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