CN103212854B - Laser scribe processing method - Google PatentsLaser scribe processing method Download PDF
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- CN103212854B CN103212854B CN201210015851.4A CN201210015851A CN103212854B CN 103212854 B CN103212854 B CN 103212854B CN 201210015851 A CN201210015851 A CN 201210015851A CN 103212854 B CN103212854 B CN 103212854B
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The laser that the present invention relates to a kind of thin-wall pipes wets cutting process method, has to relate to a kind of laser with preposition spray water guiding system and to wet cutting process method.
Laser cutting technique, owing to having minimizing process time, cuts down finished cost, and improves the advantage of workpiece quality, is widely used in the processing of metal and nonmetallic materials, and Laser cutting also has the trend replacing conventional tool gradually.
Laser Micro-Machining, because working (machining) efficiency is high, cutting residue is few, the features such as the automation of process are processed, easily realized in noncontact, thus becomes the main method of thin-wall pipes processing.The laser cutting of thin-wall pipes is moved along line of cut on tubing by overlapped laser pulse point, inputs the auxiliary fusing cutting of hyperbaric oxygen simultaneously.The material molten gasification of Laser Focusing point place, slag is blown out by gas, and metal pipe-wall forms cutting track.Originally melting gas and slag are outwards launched, but finally, most steam all becomes chip, are dispersed in ablation pattern surface surrounding and cutting.The formation of chip destroys outward appearance and the performance of part.It also reduces ablation efficiency, due to the front chip once stayed may block next time scanning time laser beam propagation path.
When the tubing of laser cutting Large Diameter Pipeline, the overheated impact brought in zonule is little.But need the tubing cutting small caliber in a lot of application, (caliber is generally less than 5mm) can produce heat fast in laser processing procedure, the thermal diffusion of part can produce fire damage, no matter be heat affected area, melt region, double teeming, or dregs, all change micro-structural.Part heat-affected zone compromises the integrality of part, and then significantly reduces processing output.
General laser micro process have dry cut and wet cut two kinds of techniques, dry cutting process is blown by assist gas in laser and the material zone of action, for removing the disintegrating slag of otch and cooling laser active region.Wet cutting has superiority usually in finding cutting, because little metal parts can produce heat fast in cutting process, wet cutting has important function in maintenance heat affected area temperature is minimum, especially because the special temperature caused that spreads increases, wet cutting can help to maintain heat management best in workpiece.Simultaneously because the material after fusing and condensation still remains in otch and cutting surfaces.In order to eliminate them, the secondary air of limited air pressure is generated usually near laser beam.But this air-flow is very ineffective, because only there is a fraction of gas penetration to enter otch.Except the chip near otch, also have fusing particle and the deposition of evaporating materials on surface.And introduce water under high pressure to cut point, the very thin moisture film of one deck can be produced at surface of the work.The particle dropped on film cools very soon and there is no the surface that method is bonded in workpiece.The specific implementation of water guide mode: compared to dry cutting process, water guide link that wet cutting process is many, needs to import cooling water to cut point position.
CN202006338U discloses a kind of high power laser light cutting machine and light-conducting system field; especially water-cooled laser cutting head; it comprises water-cooled focus lamp inner core, water-cooled focus lamp overcoat; cooling water is connected with between water-cooled focus lamp inner core, water-cooled focus lamp overcoat; condensing lens and screening glass thereof are arranged in water-cooled focus lamp inner core; it is biconial air blowing cover small in ends, broad in the middle that the laser output of described water-cooled focus lamp inner core is provided with longitudinal cross-section, and the upper tapering outer surface of cover of blowing is provided with inlet suction port.
CN1827282 discloses a kind of for CO 2the digital-control laser cutting head of numerical control laser cutter and manufacture method thereof.Digital-control laser cutting head comprises water-cooled assembly, and the upper and lower part of described water-cooled assembly is all integral annular cooling water channel structures, and its annular cooling water groove is disposable machine uniformly machine-shaping; The loss of digital-control laser cutting head air pressure and light energy is in use little, focusing effect good, good airproof performance, cut sheet metal thickness are larger, availability ratio of the armor plate is high to adopt above technology to make, and has high strength, high resistance to pressure and high-termal conductivity.
Rearmounted water guide water inlet, from the water inlet of tubing afterbody, flexible pipe is deep into interior of rotating shaft, when rotating shaft is along linear axis feeding, rubber hose needs and then feeding together, and this water guide mode flexible pipe is long, add the risk that water is revealed, require high to rotation axis seal.The not compact whole equipment of structure takes up space and is also unfavorable for greatly the control of equipment cost simultaneously.
Laser cutting machine water guiding system of the prior art is for water unstable, and structure is not compact, and whole equipment takes up space greatly, is also unfavorable for the control of equipment cost, and also no report does not control prior art automatically, supply water stable automatic water supply system.
Summary of the invention
Technical problem to be solved by this invention is in the process of Laser Processing microtubules diameter pipes, the heat produced causes fire damage to part, the problem of chip not easy-clear, a kind of laser scribe processing method is provided, it is little that the method has the fire damage caused part, the advantage of the chip easy-clear simultaneously produced in cutting process.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of laser scribe processing method, comprises following several step:
A) tubing to be cut is fixed on the rotating shaft of cutting machine;
B) aqueduct of the water guiding system of cutting machine one end from thin-wall pipes to be cut is inserted;
C) start the rotating shaft of laser cutting machine, tubing to be cut is rotated;
D) start the water guiding system of laser cutting machine, aqueduct is rotated;
E) the water circulation module of laser cutting machine is started;
F) the cutting head incising pipes of laser cutting machine is started;
Wherein, described laser cutting machine, the coaxial water fluidics module I comprised, splicing module II, two-dimension moving platform III, dust extractor IV and water circulation module V; Two-dimension moving platform III comprises linear axis 1 and rotating shaft 2, rotating shaft 2 is arranged on the slide rail of linear axis 1, and rotating shaft 2 clamps tubing 3 High Rotation Speed by pipe material clamp 4, moves along linear axis 2 simultaneously, rotating shaft 2 is hollow structure, and rotating shaft 2 is put in tubing 3 one end; Coaxial water fluidics module I is positioned at rotating shaft 2 top, comprises the coaxial water fluidic device with laser generator 5 and nozzle 6; Splicing module II is positioned at below nozzle 6, and be made up of annular seal space 7 and blanking box 9, dust extractor IV is made up of dust catcher and sweep-up pipe, and sweep-up pipe is connected with the sweep-up pipe installing hole 8 on annular seal space 7 by flange; Water circulation module V comprises collector pipe 10, sewage filter device 11, pressure pump 12, water distributor 13, collector pipe 10 one end connects blanking box 9, the other end connects sewage filter device 11, sewage filter device 11 connects pressure pump 12, water distributor water inlet is connected with pressure pump 12, and aqueduct is connected with tubing 3.
In technique scheme, the sweep-up pipe installing hole 8 of preferred technical scheme splicing module afterbody is furnished with seal plug,
There is waterproof seal rotating shaft 2 inside; Rotating shaft shell adopts waterproof material to make.Water distributor comprises motor, shaft coupling, lining, aqueduct, water inlet, delivery port, motor is connected with aqueduct by shaft coupling, lining, lining one end is positioned at shaft coupling, the other end and aqueduct are tightly connected, aqueduct has water inlet near lining one end, the external diameter of aqueduct is less than the internal diameter of tubing to be processed, and the inside of tubing to be processed is inserted in aqueduct one end.
Preferred technical scheme aqueduct has the water jet of long trough, water under high pressure sprays from water jet after entering aqueduct.In tubing cutting process to be processed, aqueduct does rotation reciprocal with tubing to be processed under the drive of motor.
Water guiding system can also comprise automatic water supply system, and this automatic water supply system comprises water tank, liquid level sensor, water inlet, magnetic valve, delivery port, centrifugal pump, water pipe and liquid level line; Liquid level sensor is positioned at the liquid level line position, middle and upper part of water tank, and one end of water inlet is connected to water tank upper, and the other end is connected with water source by magnetic valve; One end of water pipe is positioned at bottom or the side of water tank, and is positioned at below liquid level line; The other end of water pipe is connected with centrifugal pump, and one end of delivery port is positioned on centrifugal pump, and the other end is connected with the aqueduct of laser cutting machine.Water tank is made up of transparent material; Preferred technical scheme liquid level sensor, magnetic valve, centrifugal pump are controlled by programmable controller PLC.
Coaxial water fluidic device, in hollow cylindrical, there is photoelectric sensor installation seat 43 upper end, photoelectric sensor 41 and photoelectric sensor focusing knob 42 are located at above photoelectric sensor installation seat 43, below photoelectric sensor installation seat 43, coaxial water fluidic device inside is provided with 45 ° of speculums 44, in the cylindrical sidewall corresponding with 45 ° of speculums 44, be provided with lighting source 411, laser generator 45 is provided with below lighting source 411, 45 ° of speculums 44 are provided with focus lamp 47 below, the cylindrical sidewall of focus lamp 47 correspondence is provided with focus lamp focusing differential head 48, protective glass 49 is provided with below focus lamp 47, for having double-deck nozzle 46 below protective glass 49, water jet 412 passes through between nozzle 46 double-decker, nozzle 46 is connected with high service unit 410 by the water inlet 413 on sidewall.
In technique scheme, preferred technical scheme laser generator 45 is optical-fiber laser generator.Preferred technical scheme nozzle 46 is in annular, and water jet 412 is in column.Focus lamp focusing differential head 48 is for level or vertical adjusting focus lamp 47.
The present invention adopts state-of-the-art optical fiber laser, obtains sufficiently high peak power.Water under high pressure feed unit.For providing water under high pressure.Adopt circular nozzle, water jet is substantially in column.The chip that protective glass 49 avoids melting to splash in process and current are on the impact of focus lamp and laser generator.
The coaxial water fluidic device of processing is cut in wetting for thin-walled microtubules diameter pipes that the present invention proposes, in the scope that water column remains stable, product to be processed is processed, the heat that laser energy buildup and conduction are produced is walked by water-band, the heat waste of laser when cutting thin-wall pipes can being avoided to injure scorching hot, removing the chip produced in cutting process simultaneously.Because water jet is very thin, its active force is very little on workpiece, also little to the consumption of water, owing to not producing any fire damage, can process polytype material better than dry laser.Compared to the high cost of additional high pressure gas, the high flow rate in process, water can be gathered materials on the spot, and loss is few, and cost is low, and the evaporant in process or slag are substantially all taken away by current, protect environment.
Compared to dry cutting process, water guide link that wet cutting process is many, needs to import cooling water to cut point position.In the preposition spray water distributor that the present invention proposes: aqueduct adopts the tubing thinner than pipe internal diameter, water delivered to cut end, it has the water jet of long trough, can spray after water under high pressure injects aqueduct from water jet.In tubing cutting process, pipe material clamp drives tubing High Rotation Speed, and aqueduct does with tubing reciprocal rotation under the drive of motor, and water jet rotates, thus can realize the cooling of whole tubing.Be matched in clearance between aqueduct and tubing, prevent aqueduct wearing and tearing tubing in relative movement.Lining is arranged on aqueduct end, protects aqueduct first, if when second cutting microtubules diameter pipes, the external diameter of aqueduct is less, aqueduct end mounting bush, is conveniently connected with shaft coupling.
The compatible thin wall tube material that the present invention proposes is done, the laser cutting machine of wet processing technology, and its feature has:
Adding man-hour, workpiece two ends are clamped, and one end is cut, and cutting nozzles is deep in inside retaining ring, defines an annular seal space, and water smoke, gas etc. are in this annular seal space, can not expand in whole machining area and go.Machining area adopts waterproof sealing to design completely, uses same set of splicing module, does not need to carry out special switching between two kinds of processing technologys.
Dryly processing technology is cut as adopted, dust can be full of in splicing module, in order to avoid these dust have an impact to crudy, or these dust are retained in tubing and cause partial cut bad, need in time by dust catcher by these dust or soot dust granule sucking-off splicing module.Dust suction tube screw and annular seal space are coupled together by sweep-up pipe adpting flange when dry cutting.The position of suction port can not face the nozzle of cutting head, like this when dust extractor work time, can affect the normal work of the laser beam of outgoing in nozzle.If the size of pipe and tubing after laser cutting is small, tubing can be siphoned away when dust suction, therefore design mesh, prevent from siphoning away tubing.
Sweep-up pipe is connected on dust catcher interface that thin-wall pipes laser machining machine rear board configures, just sweep-up pipe can be connected with configured dust catcher by dust catcher interface.
Two-dimension moving platform comprises rotating shaft and the linear axis of high-accuracy motion, is arranged on by rotating shaft on linear axis slide rail, and rotating shaft clamping tubing High Rotation Speed, can move along linear axis simultaneously.Rotating shaft hollow, tubing can pass through.In order to prevent wet cutting from adding water leakage in man-hour, interior of rotating shaft has strict waterproof seal, prevents current from revealing, and affects the normal work of motor, and rotating shaft shell also adopts waterproof material to make simultaneously.
When machine adopt wet cut processing technology time, owing to having water smoke in process in splicing module, for preventing these water smokes from splashing everywhere, splicing module plays the function that waterproof is splashed.Add man-hour wet cutting, the sweep-up pipe installing hole plug of splicing module afterbody is blocked, prevents water smoke to be emitted to working space.
The sewage water filtration recycling module that man-hour, water circulation module produced after comprising water distributor and processing is added wet cutting.Wherein water distributor is that the cooling water of high pressure is imported to cut point, and water jet is full of the internal diameter of whole tubing, and sewage water filtration recycling module is the sewage collecting producing in process, through filtration devices.
Whole water cycle process is: water distributor imports to cut point clean high-pressure cooling water, the sewage produced in process is collected by each collector pipe, be pooled to sewage filter device to filter, after multistage filtering except the clean water of the solid residue in decontaminated water and greasy dirt pressurizeed by water pump after be transported to cut point by water distributor again.Thus realize water circulation use, reduce the sewage discharge in process, energy-conserving and environment-protective.
In laser cutting, the cooling water effect of importing: 1. cool tubing when laser cutting.2. remove chip.Motlten metal and metallic vapour are in the deposition of tube surfaces, and the cooling water of importing can produce the very thin moisture film of one deck at surface of the work, and the particle dropped on film cools very soon and there is no the surface that method is bonded in workpiece.The additional high pressure gas coaxial with laser beam blows out cutting area the chip cooled, and chip is pooled to sewage filter device together in company with current and filters.Centrifugal pump in the present invention pressurizes to cooling water, can play the effect of removing chip better.
The water distributor of laser cutting machine, introduces water under high pressure in the process for Laser Processing microtubules diameter pipes and cools fast, prevents the excessive calcination of tubing, reduces the pollution in cutting process.Water supply installation used, overcome the existing water system that supplies water for water unstable, structure is not compact, and whole equipment takes up space greatly, the drawback that equipment cost is high, and having supplies water stablizes, and compact conformation, whole equipment takes up space little, the advantage that equipment cost is low.
What the present invention proposed is applicable to the miniature tubing Laser Processing of thin-walled, can simultaneously compatible dry cut and wet cut the device of two kinds of processing technologys, and switch simple and convenient between two kinds of processing technologys, do not need other equipment and device, moreover cooling water can recycle, save production cost, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is laser cutting machine structure schematic diagram.
Fig. 2 is the structural representation of water distributor.
Fig. 3 is automatic water-supply structural representation.
Fig. 4 is coaxial water fluidic device structural representation.
In Fig. 1,1 is linear axis, and 2 is rotating shaft, and 3 is tubing, and 4 is pipe material clamp, and 5 is laser generator, and 6 is nozzle, and 7 is annular seal space, and 8 is sweep-up pipe installing hole, and 9 is blanking box, and 10 is collector pipe, and 11 is sewage filter device, and 12 is pressure pump, and 13 is water distributor.
In Fig. 2,21 is motor, and 22 is shaft coupling, and 23 is lining, and 24 is aqueduct, and 25 is automatic water supply system, and 26 is water inlet, and 27 is sealed bearing, and 28 is tubing to be processed.
In Fig. 3,31 is water tank, 32 liquid level sensors, 33 water inlets, and 34 is magnetic valve, 35 be delivery port, 36 for centrifugal pump, 37 is water pipe, and 38 is liquid level line.
In Fig. 4,41 is photoelectric sensor; 42 is photoelectric sensor focusing knob, and 43 is photoelectric sensor installation seat, and 44 is 45 ° of speculums; 45 is laser generator, and 46 is nozzle, and 47 is focus lamp; 48 is focus lamp focusing differential head; 49 is protective glass, and 410 is high service unit, and 411 is lighting source; 412 is water jet; 413 is water inlet, and 414 is workpiece to be processed, and 415 is workbench.
The illumination light that lighting source 411 is launched and the laser that optical fiber laser 45 is launched incide 45 simultaneously 0speculum 44,45 0speculum 44 pairs of laser are all-trans; and it is anti-reflection to illumination light 45 degree; beam orthogonal incides on focus lamp 47; the Energy distribution of focal beam spot can be adjusted by the distance controlled between focus lamp and processing work; laser after focusing on through focus lamp 47, by getting to processing work surface after protective glass 49.Introduce High-Pressure Water from water under high pressure feed unit 410, workpiece in process is dipped in the water jet of high-pressure water jet 412 formation.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
The present embodiment provides a kind of laser scribe processing method, comprises following several step: be fixed on the rotating shaft of cutting machine by tubing to be cut; The aqueduct of the water guiding system of cutting machine one end from thin-wall pipes to be cut is inserted; Start the rotating shaft of laser cutting machine, tubing to be cut is rotated; Start the water guiding system of laser cutting machine, aqueduct is rotated; Start the water circulation module of laser cutting machine; Start the cutting head incising pipes of laser cutting machine; Wherein, described laser cutting machine, as shown in Figure 1, the coaxial water fluidics module I comprised, splicing module II, two-dimension moving platform III, dust extractor IV and water circulation module V; Two-dimension moving platform III comprises linear axis 1 and rotating shaft 2, rotating shaft 2 is arranged on the slide rail of linear axis 1, and rotating shaft 2 clamps tubing 3 High Rotation Speed by pipe material clamp 4, moves along linear axis 2 simultaneously, rotating shaft 2 is hollow structure, and rotating shaft 2 is put in tubing 3 one end; Coaxial water fluidics module I is positioned at rotating shaft 2 top, comprises the coaxial water fluidic device with laser generator 5 and nozzle 6; Splicing module II is positioned at below nozzle 6, and be made up of annular seal space 7 and blanking box 9, dust extractor IV is made up of dust catcher and sweep-up pipe, and sweep-up pipe is connected with the sweep-up pipe installing hole 8 on annular seal space 7 by flange; Water circulation module V comprises collector pipe 10, sewage filter device 11, pressure pump 12, water distributor 13, collector pipe 10 one end connects blanking box 9, the other end connects sewage filter device 11, sewage filter device 11 connects pressure pump 12, water distributor water inlet is connected with pressure pump 12, and aqueduct is connected with tubing 3.
Water distributor contains automatic water supply system; As shown in Figure 2, described water distributor comprises motor 21, shaft coupling 22, lining 23, aqueduct 24, automatic water supply system 25 and water inlet 26, motor 21 is connected with aqueduct 24 by shaft coupling 22, lining 23, lining 23 one end is positioned at shaft coupling 22, the other end and aqueduct 24 are tightly connected, aqueduct 24 has water inlet 26 near lining 23 one end, water inlet 26 is connected with automatic water supply system 25 sealed bearing 27, the external diameter of aqueduct 24 is less than the internal diameter of tubing 28 to be processed, and aqueduct 24 gos deep into the inside of tubing to be processed away from lining 23 end.
Described automatic water supply device, as shown in Figure 3, comprises water tank 31, liquid level sensor 32, water inlet 33, magnetic valve 34, delivery port 35, centrifugal pump 36, water pipe 37 and liquid level line 38; Liquid level sensor 32 is positioned at middle and upper part liquid level line 38 position of water tank 31, and one end of water inlet 33 is connected to water tank 31 top, and the other end is connected with water source by magnetic valve 34; One end of water pipe 37 is positioned at bottom or the side of water tank 31, and is positioned at liquid level line less than 38; The other end of water pipe 37 is connected with centrifugal pump 36, and one end of delivery port 35 is positioned on centrifugal pump 36, and the other end is connected with the aqueduct of laser cutting machine.Water tank 1 is made up of transparent material, and liquid level sensor, magnetic valve 34, centrifugal pump 36 are by Controlled by Programmable Controller.
Coaxial water fluidic device, as shown in Figure 4, in hollow cylindrical, there is photoelectric sensor installation seat 43 upper end, photoelectric sensor 41 and photoelectric sensor focusing knob 42 are located at above photoelectric sensor installation seat 43, below photoelectric sensor installation seat 43, coaxial water fluidic device inside is provided with 45 ° of speculums 44, in the cylindrical sidewall corresponding with 45 ° of speculums 44, be provided with lighting source 411, laser generator 45 is provided with below lighting source 411, 45 ° of speculums 44 are provided with focus lamp 47 below, the cylindrical sidewall of focus lamp 47 correspondence is provided with focus lamp focusing differential head 48, protective glass 49 is provided with below focus lamp 47, for having double-deck nozzle 46 below protective glass 49, water jet 412 passes through between nozzle 46 double-decker, nozzle 46 is connected with high service unit 410 by the water inlet 413 on sidewall.
This device can simultaneously compatible dry cut and wet cut two kinds of processing technologys, and switch simple and convenient between two kinds of processing technologys, do not need other equipment and device, moreover cooling water can recycle, save production cost.
Priority Applications (1)
|Application Number||Priority Date||Filing Date||Title|
|CN201210015851.4A CN103212854B (en)||2012-01-19||2012-01-19||Laser scribe processing method|
Applications Claiming Priority (1)
|Application Number||Priority Date||Filing Date||Title|
|CN201210015851.4A CN103212854B (en)||2012-01-19||2012-01-19||Laser scribe processing method|
|Publication Number||Publication Date|
|CN103212854A CN103212854A (en)||2013-07-24|
|CN103212854B true CN103212854B (en)||2016-04-27|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CN201210015851.4A CN103212854B (en)||2012-01-19||2012-01-19||Laser scribe processing method|
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|CN (1)||CN103212854B (en)|
Families Citing this family (5)
|Publication number||Priority date||Publication date||Assignee||Title|
|CN103769753B (en) *||2014-02-10||2016-08-31||苏州领创激光科技有限公司||Explosion-proof perforation system|
|CN103949778B (en) *||2014-05-08||2016-02-17||湖州优刻光电科技有限公司||The cutting method of hollow out fluorescent tube|
|CN103962732B (en) *||2014-05-08||2016-03-02||湖州优刻光电科技有限公司||A kind of cutting method of hollow out fluorescent tube|
|CN105880841A (en) *||2014-12-26||2016-08-24||无锡龙舜实业有限公司||Stable cutting machine for single-wall corrugated pipe|
|CN106312326A (en) *||2015-07-07||2017-01-11||王爱华||Laser cutting device for pipe cutting|
Family Cites Families (6)
|Publication number||Priority date||Publication date||Assignee||Title|
|US6927359B2 (en) *||2001-06-14||2005-08-09||Advanced Cardiovascular Systems, Inc.||Pulsed fiber laser cutting system for medical implants|
|US20070228023A1 (en) *||2006-03-30||2007-10-04||Klaus Kleine||Pulsed Synchronized Laser Cutting of Stents|
|US7932479B2 (en) *||2007-05-31||2011-04-26||Abbott Cardiovascular Systems Inc.||Method for laser cutting tubing using inert gas and a disposable mask|
|US8333897B2 (en) *||2007-05-31||2012-12-18||Advanced Cardiovascular Systems, Inc.||Methods for laser cutting and processing tubing to make medical devices|
|EP2393627B1 (en) *||2009-02-03||2018-05-09||Abbott Cardiovascular Systems Inc.||Multiple beam laser system for forming stents|
|US8530783B2 (en) *||2009-02-03||2013-09-10||Abbott Cardiovascular Systems Inc.||Laser cutting system|
- 2012-01-19 CN CN201210015851.4A patent/CN103212854B/en active IP Right Grant
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