CN104907710A - Method and device for cutting casting blank through laser - Google Patents
Method and device for cutting casting blank through laser Download PDFInfo
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- CN104907710A CN104907710A CN201510342275.8A CN201510342275A CN104907710A CN 104907710 A CN104907710 A CN 104907710A CN 201510342275 A CN201510342275 A CN 201510342275A CN 104907710 A CN104907710 A CN 104907710A
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- laser
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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
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
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- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a cutting process of metallurgy continuous casting, in particular to a method and device for cutting a casting blank through laser. The method includes the steps that laser illuminates the casting blank through focused high-power density laser beams, so that the illuminated casting blank is rapidly melted, vaporized and eroded or reaches the ignition point; meanwhile, fusion materials are blown away through high-speed air flow coaxial with the light beams, so that the casting blank is cut open. The method and device for cutting the casting blank through laser have the advantages that in the laser cutting process, a work surface is not scratched; the laser cutting speed is high, a cut is smooth and flat, and subsequent machining is usually not needed; a cutting heat affecting area is small, a plate deforms slightly, and a cut seam is narrow; the cut has no mechanical stress or shearing burrs; the machining accuracy is high, the repeatability is good, and the surface of materials is not damaged.
Description
Technical field
The present invention relates to the cutting technique of metallurgical continuous casting, particularly relate to method and the device of the cutting of a kind of casting process strand.
Background technology
In continuous casting is produced, strand cutting is a very important link, and it is directly connected to the lumber recovery of strand, the continuity of production and energy resource consumption, and the precision of cutting scale directly has influence on the normal operation of next process.
The task of strand cutting is to solidify completely and strand after aligning is cut into required scale or multiple lengths.Because the cutting process in continuous casting steel machine completes in strand moves continuously, strict being synchronized with the movement must be carried out with strand with cutter sweep.In addition in multimachine multiple-strand caster, the lateral contour size of cutter sweep is limited to some extent.The main class of existing strand cutting method: gas flame cuttiug and mechanical shearing.
Flame cutting machine oxygen and combusted gas generant flame cut strand.Fuel gas has acetylene, two propane, natural gas, hydrogen and coke-stove gas etc.The Main Function of flame in cutting process is by METAL HEATING PROCESS to burning-point, then utilizes high pressure oxygen and metal burning to release amount of heat, forms metal oxide by metal cutting.
The advantage of flame-cutting plant is that equipment is light, and processing and manufacturing is easy, and is not subject to the restriction of strand temperature and section size; The appearance and size of equipment is less, particularly applicable to multiple-strand caster.At present, slab thickness is at the nearly all employing gas flame cuttiug of more than 200mm.Shortcoming is that metal loss is large, is about 1% ~ 1.5% of slab quality; Speed of cutting is slower; The transmission producing iron oxide, waste gas and heat when cutting needs necessary equipment of mucking haulage and ventilation unit; Need when cutting short scale to increase secondary cut, oxygen consumed and combustion gas, cut surface need carry out deburring process simultaneously.Therefore " flame cutting machine " noise of the prior art is large, oxygen consumption is high, useless combustion gas, slot are large, waste raw material and the energy, and cause enterprise profit to reduce, effectiveness of operation is greatly affected.
The mechanical shearing mode of strand has been come by mechanical shear, and mechanical shear is divided into motor and the large type of hydraulic press two by its power resources.The mode be synchronized with the movement by cutter and strand divides, then have swing type and parallel movable two type.The direction of moving by its shear blade divides, and has up cut and lower cut two kinds of modes, divides, then have horizontal and vertical two types by the direction of motion of cut strand.
Mechanical shearing shear time is short, is convenient to shear short scale; During shearing, metal loss is few; Handling safety is reliable; Good work environment.Its shortcoming is that equipment is heavy, manufacture is more difficult, consumed power is larger, and maintenance cost is higher, and equipment failure rate is high and shear ability is limited, at present the domestic conticaster being also limited to shearing slab thickness and being less than below 200mm.
Along with the development of high-efficient continuous casting technology, need under the prerequisite ensureing slab quality, comprehensive raising of caster work rate, poring rate, existing strand cutting method gas flame cuttiug or mechanical shearing all have some limitations, and the blank boosting productivity and/or optimize being difficult to simultaneously meet continuous casting production is produced.
Summary of the invention
In order to overcome the deficiency of background technology, the invention provides method and the device of a kind of casting process strand cutting.The present invention utilizes the high power density laser bundle of laser line focus to irradiate strand, irradiated strand is melted rapidly, vaporize, ablation or reach burning-point, blow down melt substance, thus strand is cut open by realization by the high velocity air coaxial with light beam simultaneously.The energy consumption that the invention solves existing strand cutting existence is high, complicated operation, stability is not enough, cutting accuracy is low, need the technical problem of following process, be applicable to arc or vertical, the conticaster such as square billet, circle base, slab, shaped blank of single current and multithread, can meet the high efficiency continuous casting production requirement of different type of machines, different section, different fluxion and different cut lengths simultaneously.The present invention simultaneously also has in laser cutting process and can not cause scuffing to working surface; Laser cutting speed is fast, and smooth cut is smooth, generally without the need to following process; Cutting heat affected area is little, and sheet deformation is little, and joint-cutting is narrow; Otch does not have mechanical stress, without shear burr; Machining accuracy is high, reproducible, not attacking material surface etc. advantage.
Technical scheme of the present invention is: a kind of method utilizing laser cutting strand, comprises the following steps: cutting travel mechanism (1) longitudinally keeps synchronized in the same way with strand (4) and moves in relative synchronization; Laser cutting protection mechanism (2) and laser cutting machine (3) do transverse movement according to split requirement along strand (4) mobile vertical direction simultaneously, laser cutter is to strand (4) top desired location, and start cutting according to the cutoff signal that scale system provides, blow down melt substance with the high velocity air of laser beams coaxial simultaneously; Cutting travel mechanism (1) drives laser cutting machine (3) mobile along strand (4) motion in the other direction, return to cutting operation start position next time, laser cutter starts to return cutting starting point in the other direction along cutting, and is parked in cutting gun original position.
According to the method utilizing laser cutting strand as above, it is characterized in that: described laser cutting protection mechanism (2) adopts the air-cooled mode combined with water-cooled to guarantee the stable operation of laser cutting machine (3).
According to the method utilizing laser cutting strand as above, it is characterized in that: nozzle and strand (4) surface spacing of described high velocity air ejiction opening are not less than 0.5mm, laser beam focal position is under strand (4) surface and is not less than 5mm.
According to the method utilizing laser cutting strand as above, it is characterized in that: described high velocity air adopts compressed air or inert gas.
According to the method utilizing laser cutting strand as above, it is characterized in that: described high velocity air adopts active gases.
According to the method utilizing laser cutting strand as above, it is characterized in that: described active gases is oxygen.
A kind of device utilizing laser cutting strand, comprise cutting travel mechanism (1), laser cutting protection mechanism (2), laser cutting machine (3), laser cutting protection mechanism (2) and laser cutting machine (3) are arranged in cutting travel mechanism (1), and laser cutting protection mechanism (2) and laser cutting machine (3) are arranged on strand (4) top, it is characterized in that: described laser cutting protection mechanism (2) and laser cutting machine (3) can do transverse movement according to split requirement along strand (4) mobile vertical direction, and cut travel mechanism (1) simultaneously and longitudinally keep synchronized in the same way with strand (4) and move in relative synchronization.
According to the device utilizing laser cutting strand as above, it is characterized in that: described laser cutting machine (3) comprises laser body, laser controlling mechanism, laser cutting machine main body three part; At least a branch of laser beam cutting strand (4) that laser body sends, laser controlling mechanism, according to being cut the material of strand and cross dimensions, adjusts laser power size, focal length and focal position, lasing beam diameter, blowing gas pressure and flow parameter; Laser cutting machine main body is equipped with laser cutter, laser cutter is equipped with and highly follows sensor.
According to the device utilizing laser cutting strand as above, it is characterized in that: described blowing gas and laser beams coaxial.
According to the device utilizing laser cutting strand as above, it is characterized in that: described laser cutting protection mechanism (2) and laser cutting machine (3) are set together, laser cutting protection mechanism (2) adopts the air-cooled mode combined with water-cooled to guarantee the stable operation of laser cutting machine (3).
The invention has the beneficial effects as follows: 1, cutting speed of the present invention is fast, maintenance cost is few, simple to operate, good stability, can meet the requirement of high casting speed continuous casting rhythm of production; 2, good cutting effect of the present invention, otch is narrow, and cutting surfaces roughness is good, without the need to following process, can improve strand cut quality, improves metal pick-up rate, reduce iron oxide slag, reach energy-saving and cost-reducing object; 3, to cut the precision of scale high in the present invention, can guarantee the normal operation of next process, be conducive to production direct motion.
Accompanying drawing explanation
Fig. 1 is method and the device schematic diagram that the present invention utilizes laser cutting strand.
Detailed description of the invention
Name Resolution:
Nozzle: be the exit of assist gas ejection on laser cutting machine, i.e. high velocity air ejiction opening.
High velocity air: gas outlet diameter is at below 3mm, and air pressure is at more than 3bar.
Description of reference numerals: 1-cutting travel mechanism, 2-laser cutting protection mechanism, 3-laser cutting machine, 4-strand
As shown in Figure 1, the device utilizing laser cutting strand of the present invention, comprise cutting travel mechanism 1, laser cutting protection mechanism 2, laser cutting machine 3, laser cutting protection mechanism 2 and laser cutting machine 3 are arranged on above strand 4, laser cutting protection mechanism 2 and laser cutting machine 3 can move vertical direction according to split requirement along strand 4 and do transverse movement, and the longitudinal maintenance of the travel mechanism 1 of cutting is simultaneously moved in relative synchronization with strand 4 is synchronized in the same way.
Laser cutting machine 3 of the present invention comprises laser body, laser controlling mechanism, laser cutting machine main body three part; At least a branch of laser beam cutting strand 4 that laser body sends, laser controlling mechanism is according to being cut the material of strand and cross dimensions, the parameters such as adjustment laser power size, focal length and focal position, lasing beam diameter, blowing gas pressure and flow, the laser cutter of laser cutting machine main body is equipped with and highly follows sensor, for cutting according to the automatic mobile laser cutter of the actual height of strand.Laser cutting machine 3 is contained in cutting travel mechanism 1, realizes being synchronized with the movement with strand during cutting.
Laser cutting protection mechanism 2 of the present invention is set together with laser cutting machine 3, and laser cutting protection mechanism 2 adopts the air-cooled mode combined with water-cooled to guarantee the stable operation of laser cutting machine 3.Because the working environment that strand 4 cuts is very severe, as high in environment temperature, dust is many, billet surface oxide skin, dust, impurity are large.When laser cutting machine 3 works, continuous casting blank temperature is all more than 800 DEG C, and laser cutting machine trigger mechanism and laser cutting machine main body, be subject to high-temperature baking repeatedly even for a long time, very easily damage, laser cutting protection mechanism 2 can ensure laser cutting machine 3 work reliably and with long-term.
Cutting travel mechanism 1 of the present invention can ensure laser cutting machine 3 being synchronized with the movement along throwing direction and strand 4.Meanwhile, vertical with throwing within direction linear guide is housed, can make laser cutting machine 3 vertically and throwing direction move reciprocatingly, realize repeatedly the cutting of strand 4.
The course of work of this device is that laser cutter starts to carry out cutting operation, and laser cutter moves vertical direction along strand 4 and does transverse movement, cuts travel mechanism 1 simultaneously and longitudinally keeps the synchronized in the same way movement in relative synchronization with strand 4.After strand 4 is cut-off, laser cutter starts to return cutting starting point in the other direction along cutting, and is parked in cutting gun original position; Simultaneously laser cutting machine 3 fast return, to move high-speed mobile in the other direction along strand 4, returns to cutting operation start position next time, then repeat said process as scale system provides signal again.
The method of laser cutting strand that utilizes of the present invention is: when strand 4 run to required cut lengths also poor 100mm to 500mm time, provide a signal, height now on laser cutting machine 3 follows sensor, according to desired location above the actual height of strand 4 automatic mobile laser cutter to strand 4.When after arrival strand cut lengths, scale system provides cutoff signal; Cutting travel mechanism 1 longitudinally keeps synchronized in the same way with strand 4 and moves in relative synchronization, makes laser cutting machine 3 being synchronized with the movement along throwing direction and strand 4; Laser cutter, then starts to carry out laser cutting to strand 4 along the linear guide in vertical and throwing direction at a slow speed near strand 4 edge; Cutting process is that laser cutting machine 3 moves vertical direction along strand and does transverse movement, and laser cutting machine 3 pairs of strands 4 carry out cutting operation; Blow down melt substance by the high velocity air coaxial with light beam simultaneously, thus realize strand to cut open.
Because working environment of the present invention is very severe, the mode that laser cutting machine 3 combines preferably by air-cooled and water-cooled is guaranteed to cool, to guarantee the stable operation of system.
Laser cutting utilizes the high power density laser bundle of line focus to irradiate workpiece, irradiated material melted rapidly, vaporize, ablation or reach burning-point, blow down melt substance, thus workpiece cut open by realization by the high velocity air coaxial with light beam simultaneously.When laser cutting machine 3 of the present invention works, strand 4 surface temperature is all more than 800 DEG C, strand central temperature can reach more than 1000 DEG C, working environment and cut material are all different from common metal laser cutting, and after laser beam irradiation to strand, strand can melt sooner or reach burning-point, simultaneously in conjunction with continuous casting rhythm of production and product quality requirement, so its running parameter mainly contains cutting speed, need be actual according to produced on-site, carry out conservative control in conjunction with Casting speed, cut lengths.
Specifically, laser cutting major parameter comprises: laser output power, focal position, nozzle and the manometric selection of casting billet surface spacing, assist gas and assist gas,
During practical operation, peak power is usually set to obtain high cutting speed or in order to cut thicker material, to be generally 3000 ~ 15000W.When focus is in optimum position, slot is minimum, most effective, and optimum Cutting speed can obtain optimum Cutting result.Under most of applicable cases, under beam focus is adjusted to and is just in nozzle, nozzle and casting billet surface spacing are generally about 0.5mm ~ 2.5mm, and during cutting, focal position has just been in about 5 ~ 100mm under casting billet surface.
Assist gas of the present invention and laser beams coaxial spray place, protection lens are from polluting and blowing away molten slag bottom cutting area, and assist gas can use compressed air or inert gas, remove the material dissolved, and suppress cutting area overfire simultaneously.
When high-speed cutting strand, assist gas also can use active gases (oxygen), formed and scorching hot strand generation exothermic oxidation reaction, this part additional heat can improve cutting speed, higher gas pressure is needed to prevent the otch back side to be stained with slag, oxygen gas flow rate is higher, and the speed of combustion chemistry reaction and removal slag is also faster, and oxygen pneumatic is at 20 ~ 100bar.
Such as: section is 200 × 200mm square billet, pulling rate 2m/min, cut lengths 9m, laser cutting speed is 1200mm/min, laser output power 6000W, and nozzle and casting billet surface spacing are generally 1 ~ 2mm, during cutting, focal position has just been in about 2 ~ 10mm under casting billet surface, and assist gas adopts oxygen, and air pressure is 0.1 ~ 2Mpa.
Assist gas is that the laser cutting process of oxygen also exists two thermals source, and namely laser irradiates the heat energy that energy and oxygen and strand chemical reaction produce.During cutting strand, surface temperature is all more than 800 DEG C, strand central temperature can reach 1000 DEG C, oxidation reaction liberated heat accounts for the ratio of the required all energy of cutting, higher than conventional cutting metal, in laser cutting process, by improving gas velocity, combustion chemistry reaction and remove the speed of slag and also accelerate, can cutting thickness also larger.
Method of the present invention utilizes the high power density laser bundle of laser line focus to irradiate strand, irradiated strand is melted rapidly, vaporize, ablation or reach burning-point, blow down melt substance, thus strand is cut open by realization by the high velocity air coaxial with light beam simultaneously.Adopt the method to carry out cutting to have the following advantages: scuffing can not be caused to casting billet surface; Laser cutting speed is fast, and smooth cut is smooth, generally without the need to following process; Cutting heat affected area is little, and sheet deformation is little, and joint-cutting is narrow; Otch does not have mechanical stress, without shear burr; Machining accuracy is high, reproducible, not attacking material surface.
Embodiment 1
Continuous casting produces the small billet of section 150mm × 150mm, when cut lengths is 12m, when strand 4 run to required cut lengths also poor 300mm time, provide a signal, height now on laser cutter follows sensor, according to 1mm position above the actual height colonel automatic mobile cutter to strand of strand.When after arrival strand cut lengths 12m, scale system provides cutoff signal, cutting travel mechanism 1 action keeps synchronous with strand 4, simultaneously laser cutter along vertically and the linear guide in throwing direction at a slow speed near strand edge, start to carry out laser cutting to strand 4.
Laser cutter starts to carry out cutting operation, and laser cutter moves vertical direction along strand 4 and does transverse movement, cuts travel mechanism 1 simultaneously and longitudinally keeps the synchronized in the same way movement in relative synchronization with strand.After strand 4 is cut-off, laser cutter starts to return cutting starting point in the other direction along cutting, and is parked in cutting gun original position; Simultaneously laser cutting machine 3 fast return, to move high-speed mobile in the other direction along steel billet, returns to cutting operation start position next time, then repeat said process as scale system provides signal again.
During cutting step, laser cutting protection mechanism 2 remains duty, and according to the temperature of laser cutting machine 3, the mode adopting air-cooled water-cooled to combine is to guarantee the stable operation of laser cutting machine 3.
Claims (10)
1. utilize a method for laser cutting strand, it is characterized in that: comprise the following steps:
Cutting travel mechanism (1) longitudinally keeps synchronized in the same way with strand (4) and moves in relative synchronization; Laser cutting protection mechanism (2) and laser cutting machine (3) do transverse movement according to split requirement along strand (4) mobile vertical direction simultaneously;
Laser cutter to strand (4) top desired location, and starts cutting according to the cutoff signal that scale system provides, and blows down melt substance with the high velocity air of laser beams coaxial simultaneously;
Cutting travel mechanism (1) drives laser cutting machine (3) mobile along strand (4) motion in the other direction, return to cutting operation start position next time, laser cutter starts to return cutting starting point in the other direction along cutting, and is parked in cutting gun original position.
2. the method utilizing laser cutting strand according to claim 1, is characterized in that: described laser cutting protection mechanism (2) adopts the air-cooled mode combined with water-cooled to guarantee the stable operation of laser cutting machine (3).
3. the method utilizing laser cutting strand according to claim 1 and 2, it is characterized in that: nozzle and strand (4) surface spacing of described high velocity air ejiction opening are not less than 0.5mm, laser beam focal position is under strand (4) surface and is not less than 5mm.
4. the method utilizing laser cutting strand according to claim 1 and 2, is characterized in that: described high velocity air adopts compressed air or inert gas.
5. the method utilizing laser cutting strand according to claim 1 and 2, is characterized in that: described high velocity air adopts active gases.
6. the method utilizing laser cutting strand according to claim 5, is characterized in that: described active gases is oxygen.
7. one kind utilizes the device of laser cutting strand, comprise cutting travel mechanism (1), laser cutting protection mechanism (2), laser cutting machine (3), laser cutting protection mechanism (2) and laser cutting machine (3) are arranged in cutting travel mechanism (1), and laser cutting protection mechanism (2) and laser cutting machine (3) are arranged on strand (4) top, it is characterized in that: described laser cutting protection mechanism (2) and laser cutting machine (3) can do transverse movement according to split requirement along strand (4) mobile vertical direction, and cut travel mechanism (1) simultaneously and longitudinally keep synchronized in the same way with strand (4) and move in relative synchronization.
8. the device utilizing laser cutting strand according to claim 7, is characterized in that: described laser cutting machine (3) comprises laser body, laser controlling mechanism, laser cutting machine main body three part; At least a branch of laser beam cutting strand (4) that laser body sends, laser controlling mechanism, according to being cut the material of strand and cross dimensions, adjusts laser power size, focal length and focal position, lasing beam diameter, blowing gas pressure and flow parameter; Laser cutting machine main body is equipped with laser cutter, laser cutter is equipped with and highly follows sensor.
9. the device utilizing laser cutting strand according to claim 8, is characterized in that: described blowing gas and laser beams coaxial.
10. the device utilizing laser cutting strand according to claim 7, it is characterized in that: described laser cutting protection mechanism (2) and laser cutting machine (3) are set together, laser cutting protection mechanism (2) adopts the air-cooled mode combined with water-cooled to guarantee the stable operation of laser cutting machine (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510342275.8A CN104907710A (en) | 2015-06-19 | 2015-06-19 | Method and device for cutting casting blank through laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342275.8A CN104907710A (en) | 2015-06-19 | 2015-06-19 | Method and device for cutting casting blank through laser |
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| CN104907710A true CN104907710A (en) | 2015-09-16 |
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| CN201510342275.8A Pending CN104907710A (en) | 2015-06-19 | 2015-06-19 | Method and device for cutting casting blank through laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108515254A (en) * | 2018-06-28 | 2018-09-11 | 河北科技大学 | Continuous casting billet automatic fixed-length cutter |
| CN111916760A (en) * | 2020-07-09 | 2020-11-10 | 界首市南都华宇电源有限公司 | Energy-saving and environment-friendly continuous casting and slicing production equipment for lead storage battery grid |
| CN114905019A (en) * | 2021-02-10 | 2022-08-16 | 上海梅山钢铁股份有限公司 | Intelligent control method for cutting machine gun speed based on online blank temperature detection |
| CN117583730A (en) * | 2023-12-01 | 2024-02-23 | 海目星激光科技集团股份有限公司 | welding equipment |
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| CN2551878Y (en) * | 2002-07-11 | 2003-05-21 | 刘继明 | Flame cutting machine |
| JP2006245498A (en) * | 2005-03-07 | 2006-09-14 | Sharp Corp | Process and apparatus for producing substrate |
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| CN108515254A (en) * | 2018-06-28 | 2018-09-11 | 河北科技大学 | Continuous casting billet automatic fixed-length cutter |
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| CN111916760A (en) * | 2020-07-09 | 2020-11-10 | 界首市南都华宇电源有限公司 | Energy-saving and environment-friendly continuous casting and slicing production equipment for lead storage battery grid |
| CN111916760B (en) * | 2020-07-09 | 2021-08-10 | 界首市南都华宇电源有限公司 | Energy-saving and environment-friendly continuous casting and slicing production equipment for lead storage battery grid |
| CN114905019A (en) * | 2021-02-10 | 2022-08-16 | 上海梅山钢铁股份有限公司 | Intelligent control method for cutting machine gun speed based on online blank temperature detection |
| CN117583730A (en) * | 2023-12-01 | 2024-02-23 | 海目星激光科技集团股份有限公司 | welding equipment |
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Application publication date: 20150916 |
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