CN103212805A - Laser cutting machine comprising front spraying and water guiding structure - Google Patents
Laser cutting machine comprising front spraying and water guiding structure Download PDFInfo
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- CN103212805A CN103212805A CN2012100158976A CN201210015897A CN103212805A CN 103212805 A CN103212805 A CN 103212805A CN 2012100158976 A CN2012100158976 A CN 2012100158976A CN 201210015897 A CN201210015897 A CN 201210015897A CN 103212805 A CN103212805 A CN 103212805A
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Abstract
The invention relates to a laser cutting machine, mainly solving the problems that during the process of machining a tube with a miniature diameter by a laser cutting machine in the prior art, thermal damage is brought to a spare part by generated heat, and scraps are not easily cleaned. The invention adopts the technical scheme that the laser cutting machine comprises a coaxial water jet-flowing device system and a front water guiding system, wherein the motor (1) of the front water guiding system is connected with a water guiding pipe (4) through a coupling (2) and a bushing (3), one end of the bushing (3) is arranged in the coupling (2), the other end of the bushing (3) is connected with the water guiding pipe (4) in a sealing way, a water inlet (6) is arranged on the end of the water guiding pipe (4) close to the bushing (3), the water inlet (6) is connected with the sealed bearing (7) of an automatic water supply system (5), the outer diameter of the water guiding pipe (4) is smaller than the inner diameter of a to-be-processed tube (8), and the end, far away from the bushing (3), of the water guiding pipe (4) is embedded into the inside of the to-be-processed tube. According to the invention, the problems are better solved, and the laser cutting machine can be applied to the industrial production of laser wet cutting processing.
Description
Technical field
The present invention relates to the wet cutting machine of a kind of laser that contains preposition spray water guide structure, have and relate to a kind of laser cutting machine with preposition spray water distributor and coaxial water jet device.
Background technology
Laser cutting technique cuts down finished cost owing to have minimizing process time, improves the advantage of workpiece quality, be widely used in the processing of metal and nonmetallic materials, and Laser cutting also has the trend that replaces conventional tool gradually.
Laser Micro-Machining is owing to working (machining) efficiency height, few, the noncontact of cutting residue processing, easily realize the characteristics such as automation of process, thereby becomes the main method of thin-wall pipes processing.The laser cutting of thin-wall pipes is to be moved at tubing upper edge line of cut by overlapped laser pulse point, imports the auxiliary fusing cutting of hyperbaric oxygen simultaneously.Laser focal spot material fusion and gasification, slag is blown out by gas, forms cutting track on metal pipe-wall.Fusion gas and slag be outwards emission originally, but last, most steam has all become chip, is dispersed in around the ablation pattern surface and in the cutting.The formation of chip has destroyed the outward appearance and the performance of part.It has also reduced ablation efficiency, because the preceding chip that once stays may block the path that laser beam is propagated when scanning next time.
When the tubing of the big caliber of laser cutting, the overheated influence that brings in zonule is little.But, need to cut the tubing of small caliber in a lot of the application, (caliber is generally less than 5mm) can produce heat fast in laser processing procedure, the thermal diffusion meeting of part produces fire damage, no matter be the heat affected area, melt zone, double teeming, or dregs, micro-structural all changed.The integrality of part has been endangered in the part heat-affected zone, and then has obviously reduced processing output.
General Laser Micro-Machining technology has driedly cuts and wets and cut two kinds of technologies, and dried cutting process is that assist gas is blown in the laser and the material zone of action, is used to remove the disintegrating slag and the cooling laser active region of otch.Wet cutting usually has superiority in the finding cutting, because little metal parts can produce heat fast in cutting process, wet cutting keeping having important function aspect the temperature minimum of heat affected area, especially because the temperature that special diffusion causes increases, wet cutting can help to keep heat management best in the workpiece.While is owing to fusing and the material after condensing still remains in otch and cutting is surperficial.In order to eliminate them, the secondary air of limited air pressure is generated near laser beam usually.But this air-flow is very ineffective, because only there is a fraction of gas penetration to enter otch.Except near the chip the otch, melt particle and evaporating materials deposition in addition on the surface.And introduce water under high pressure to cut point, can produce the very thin moisture film of one deck at surface of the work.Drop on the very fast cooling of particle on the film and can't be bonded in the surface of workpiece.The specific implementation of water guide mode: than dried cutting process, water guide link that wet cutting process is many need import cooling water to the 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; be connected with cooling water between water-cooled focus lamp inner core, the water-cooled focus lamp overcoat; condensing lens and screening glass thereof are installed in the water-cooled focus lamp inner core; the laser output of described water-cooled focus lamp inner core is equipped with the longitudinal cross-section and is biconial air blowing cover small in ends, broad in the middle, and the tapering outer surface is provided with inlet suction port on the cover of blowing.
CN1827282 discloses a kind of CO of being used for
2The digital-control laser cutting head of numerical control laser cutter and manufacture method thereof.Digital-control laser cutting head comprises the water-cooled assembly, and the upper and lower part of described water-cooled assembly all is integral annular cooling water channel structures, and its annular cooling water groove is disposable machining moulding; The loss of air pressure and light energy is little in use, focusing effect good, good airproof performance, bigger, the sheet material utilization rate height of sheet metal thickness that is cut to adopt above technology to make digital-control laser cutting head, and has high strength, high resistance to pressure and high-termal conductivity.
Laser cutting machine water guide system water supply instability of the prior art, structure is not compact, and entire equipment takes up space greatly, also is unfavorable for the control of equipment cost, and prior art there is not report control automatically yet, stable automatic water supply system supplies water.
Summary of the invention
Technical problem to be solved by this invention is in the process of Laser Processing microtubules diameter pipes, the heat that produces causes fire damage to part, chip is the problem of easy-clear not, a kind of laser cutting machine is provided, it is little to adopt this laser cutting machine to have the fire damage that part is caused, simultaneously the advantage of the chip easy-clear that produces in the 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 cutting machine, comprise coaxial water jet device 9, anchor clamps 10, seal plug 11 and preposition spray water distributor, and preposition spray water distributor contains automatic water supply system; Described preposition spray water distributor, comprise motor 1, shaft coupling 2, lining 3, aqueduct 4, automatic water supply system 5 and water inlet 6, motor 1 links to each other with aqueduct 4 by shaft coupling 2, lining 3, lining 3 one ends are positioned at shaft coupling 2, the other end and aqueduct 4 are tightly connected, aqueduct 4 has water inlet 6 near lining 3 one ends, water inlet 6 is connected with automatic water supply system 5 sealed bearings 7, the external diameter of aqueduct 4 is less than the internal diameter of tubing 8 to be processed, and aqueduct 4 gos deep into the inside of tubing to be processed away from lining 3 ends.
In the technique scheme, the water jet of long trough is arranged on the optimized technical scheme aqueduct, water under high pressure sprays from water jet after entering aqueduct.In tubing cutting process to be processed, aqueduct 4 is done under the drive of motor 1 and tubing 8 reciprocal rotations to be processed.
Automatic water supply system 5 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 an end of water inlet is connected water tank upper, and the other end links to each other with the water source by magnetic valve; One end of water pipe is positioned at the bottom or the side of water tank, and is positioned at below the liquid level line; The other end of water pipe links to each other with centrifugal pump, and an end of delivery port is positioned on the centrifugal pump, and the aqueduct of the other end and laser cutting machine links to each other.
In the technique scheme, the optimized technical scheme water tank is made by transparent material; Optimized technical scheme liquid level sensor, magnetic valve, centrifugal pump are controlled by Programmable Logic Controller (PLC).
Coaxial water jet device is hollow cylindrical, and there is photoelectric sensor mount pad 3 upper end, photoelectric sensor 1 and photoelectric sensor focusing knob 2 be located at photoelectric sensor mount pad 3 above, below the photoelectric sensor mount pad 3, coaxial water jet device inside is provided with 45
0Speculum 4 is with 45
0On the cylindrical sidewall of speculum 4 correspondences, be provided with lighting source 5, be provided with laser generator 6,45 below the lighting source 5
0Be provided with focus lamp 7 below the speculum 4; the cylindrical sidewall of focus lamp 7 correspondences is provided with focus lamp focusing differential head 8; be provided with protective glass 9 below the focus lamp 7; protective glass 9 following for having double-deck nozzle 11; water jet 12 passes through between nozzle 11 double-deckers, and nozzle 11 is connected with high service unit 10 by the water inlet on the sidewall 13.
In the technique scheme, the coaxial water jet device of optimized technical scheme comprises that also work top places tubing 14 to be processed, and tubing 14 to be processed is positioned at nozzle 11 belows.Optimized technical scheme laser generator 6 is the optical-fiber laser generator.Optimized technical scheme nozzle 11 is annular, and water jet 12 is column.Focus lamp focusing differential head 8 is used for level or vertical adjusting focus lamp 7.
The present invention adopts state-of-the-art optical fiber laser, obtains sufficiently high peak power.The water under high pressure feed unit.Be used to provide water under high pressure.Adopt circular nozzle, water jet is column basically.Protective glass 9 is avoided the influence to focus lamp and laser generator of chip that fusion splashes and current in process.
The principle of the coaxial water jet device that is applicable to the thin-wall pipes Laser Micro-Machining that the present invention proposes is: introduce the cooling water auxiliary cutting coaxial with laser beam in laser processing procedure, employing focuses on the back in water column is kept stable scope with laser beam, workpiece is dipped in wherein workpiece to be processed is processed, the heat that makes laser energy accumulation and conduction produce is taken away by water, can avoid the heat waste of laser when thin-wall pipes is cut to injure scorching hot.The current of coaxial incident can effectively reduce the heat affected area, reduce thermal stress and produce to suppress the surface of the work crackle.In workpiece process, introduce simultaneously can the better guarantee follow-up processing of fracture strength that coaxial water jet can improve material and the service life of device.The high temperature of laser rises water temperature simultaneously, and the bubble of generation and the activity of heating liquid help the discharge of slag, improves crudy.Washing away of current makes the material of great majority fusing be taken away by water jet, has only the small part chip to stay.Can produce the very thin moisture film of one deck at surface of the work, drop on the very fast cooling of particle on the film and can't be bonded in the surface of workpiece.High-pressure water jet can replace auxiliary gases at high pressure, and workpiece is cooled off and takes away slag and the chip that produces in the process.
Than dried cutting process, water guide link that wet cutting process is many need import cooling water to the cut point position.In the preposition spray water distributor that the present invention proposes: aqueduct is to adopt the tubing thinner than pipe internal diameter, and water is delivered to cut end, and the water jet of long trough is arranged on it, and water under high pressure can spray from water jet after injecting aqueduct.In the tubing cutting process, the tubing anchor clamps drive tubing and rotate at a high speed, and aqueduct is done under the drive of motor and the reciprocal rotation of tubing, and water jet rotates, thereby can realize the cooling of whole tubing.Be matched in clearance between aqueduct and the tubing, prevent aqueduct wearing and tearing tubing in the relative motion process.Lining is installed in the aqueduct end, protects aqueduct first, if second during cutting microtubules diameter pipes, the external diameter of aqueduct is littler, and the terminal mounting bush of aqueduct conveniently is connected with shaft coupling.
The output shaft of motor is connected with shaft coupling, and the other end of shaft coupling is connected with the lining that installs aqueduct, thereby rotatablely moving of motor output shaft is delivered to aqueduct.Water tank is made by transparent material, can observe the variation of water level at any time.Liquid level sensor is installed in water tank, preestablishes the numerical value of liquid level sensor, as long as water level is lower than the registration of liquid level sensor, liquid level sensor sends signal, and magnetic valve is opened, water filling in water tank.Magnetic valve is in normally closed state.Centrifugal pump has water inlet and delivery port, and water inlet is connected with water tank by water pipe, and the current of process centrifugal pump become water under high pressure and penetrated by delivery port, and delivery port is connected with aqueduct.Whole process is controlled by PLC, and it is stable to supply water.
In the laser cutting, the cooling water effect of importing: 1. when laser cutting, cool off tubing.2. removing 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, drop on the very fast cooling of particle on the film and can't be bonded in the surface of workpiece.The auxiliary gases at high pressure coaxial with laser beam blow out cutting area to the chip of cooling, and chip is pooled to sewage filter device together in company with current and filters.Centrifugal pump among the present invention pressurizes to cooling water, can play the effect of removing chip better.
The present invention proposes is applicable to that thin-wall pipes is wet and cuts the laser cutting machine with preposition water distributor of processing, and the process that is used for Laser Processing microtubules diameter pipes is introduced water under high pressure and cooled off fast, prevents the excessive calcination of tubing, reduces the pollution in the cutting process.Overcome the drawback that rearmounted water guide exists simultaneously.Used water supply installation, it is unstable to have overcome existing water system water supply, and structure is not compact, and entire equipment takes up space greatly, the drawback that equipment cost is high, having supplies water stablizes compact conformation, entire equipment takes up space little, and the advantage that equipment cost is low has obtained better technical effect.
Description of drawings
Fig. 1 is the laser cutting machine structure schematic diagram.
Fig. 2 is the wet laser cutting machine supply equipment schematic diagram of processing of cutting.
Fig. 3 is coaxial water jet device structural representation.
Among Fig. 1,1 is motor, and 2 is shaft coupling, and 3 is lining, and 4 is aqueduct, and 5 is automatic water supply system, and 6 is water inlet, and 7 is sealed bearing, and 8 is tubing to be processed, and 9 is coaxial water jet device, and 10 is anchor clamps, and 11 is seal plug.I is processing district; II is district to be processed.
Among Fig. 2,1 is water tank, 2 liquid level sensors, and 3 water inlets, 4 is magnetic valve, and 5 is that delivery port, 6 is centrifugal pump, and 7 is water pipe, and 8 is liquid level line.
Among Fig. 3,1 is photoelectric sensor; 2 is the photoelectric sensor focusing knob, and 3 is that photoelectric sensor mount pad 3,4 is 45
0Speculum, 5 is lighting source, and 6 is laser generator, and 7 is focus lamp, and 8 are focus lamp focusing differential head, and 9 is protective glass, and 10 is the high service unit, and 11 is nozzle, and 12 is water jet, and 13 is water inlet, and 14 is tubing to be processed.
The invention will be further elaborated below by embodiment, but be not limited only to present embodiment.
Specific embodiment
[embodiment 1]
This example provides a kind of laser cutting machine, as shown in Figure 1, comprises coaxial water jet device 9, anchor clamps 10, seal plug 11 and preposition spray water distributor, and preposition spray water distributor contains automatic water supply system; Described preposition spray water distributor, comprise motor 1, shaft coupling 2, lining 3, aqueduct 4, automatic water supply system 5 and water inlet 6, motor 1 links to each other with aqueduct 4 by shaft coupling 2, lining 3, lining 3 one ends are positioned at shaft coupling 2, the other end and aqueduct 4 are tightly connected, aqueduct 4 has water inlet 6 near lining 3 one ends, water inlet 6 is connected with automatic water supply system 5 sealed bearings 7, the external diameter of aqueduct 4 is less than the internal diameter of tubing 8 to be processed, and aqueduct 4 gos deep into the inside of tubing to be processed away from lining 3 ends.
Described automatic water supply device as shown in Figure 2, comprises water tank 1, liquid level sensor 2, water inlet 3, magnetic valve 4, delivery port 5, centrifugal pump 6, water pipe 7 and liquid level line 8; Liquid level sensor 2 is positioned at middle and upper part liquid level line 8 positions of water tank 1, and an end of water inlet 3 is connected water tank 1 top, and the other end links to each other with the water source by magnetic valve 4; One end of water pipe 7 is positioned at the bottom or the side of water tank 1, and is positioned at liquid level line below 8; The other end of water pipe 7 links to each other with centrifugal pump 6, and an end of delivery port 5 is positioned on the centrifugal pump 6, and the aqueduct of the other end and laser cutting machine links to each other.Water tank 1 is made by transparent material, and liquid level sensor, magnetic valve 4, centrifugal pump 6 are by Controlled by Programmable Controller.
Coaxial water jet device as shown in Figure 3, is hollow cylindrical, there is photoelectric sensor mount pad 3 upper end, photoelectric sensor 1 and photoelectric sensor focusing knob 2 be located at photoelectric sensor mount pad 3 above, below the photoelectric sensor mount pad 3, coaxial water jet device inside is provided with 45
0Speculum 4 is with 45
0On the cylindrical sidewall of speculum 4 correspondences, be provided with lighting source 5, be provided with laser generator 6,45 below the lighting source 5
0Be provided with focus lamp 7 below the speculum 4; the cylindrical sidewall of focus lamp 7 correspondences is provided with focus lamp focusing differential head 8; be provided with protective glass 9 below the focus lamp 7; protective glass 9 following for having double-deck nozzle 11; water jet 12 passes through between nozzle 11 double-deckers, and nozzle 11 is connected with high service unit 10 by the water inlet on the sidewall 13.
Adopt this device to supply water to laser cutting machine, preestablish the numerical value of liquid level sensor, as long as water level is lower than the registration of liquid level sensor, liquid level sensor sends signal, and magnetic valve is opened, water filling in water tank.Magnetic valve is in normally closed state.
This embodiment provides is applicable to the wet method for processing of cutting of thin-wall pipes, the process introducing water under high pressure that is used for Laser Processing microtubules diameter pipes cools off fast, prevent the excessive calcination of tubing, reduce the pollution in the cutting process, overcome the drawback that rearmounted water guide exists simultaneously.The automatic water supply device of the wet cutting processing of used laser have supply water stable, compact conformation, equipment takes up space little, the advantage that equipment cost is low.
Claims (6)
1. a laser cutting machine comprises coaxial water jet device (9), anchor clamps (10), seal plug (11) and preposition spray water distributor, and preposition spray water distributor contains automatic water supply system; Described preposition spray water distributor, comprise motor (1), shaft coupling (2), lining (3), aqueduct (4), automatic water supply system (5) and water inlet (6), motor (1) is by shaft coupling (2), lining (3) links to each other with aqueduct (4), lining (3) one ends are positioned at shaft coupling (2), the other end and aqueduct (4) are tightly connected, aqueduct (4) has water inlet (6) near lining (3) one ends, water inlet (6) is connected with automatic water supply system (5) by sealed bearing (7), the external diameter of aqueduct (4) is less than the internal diameter of tubing to be processed (8), and aqueduct (4) is away from the inside of lining (3) end insertion tubing to be processed.
2. laser cutting machine according to claim 1 is characterized in that having on the aqueduct (4) water jet of long trough, and water under high pressure sprays from water jet after entering aqueduct.
3. laser cutting machine according to claim 1 is characterized in that in tubing cutting process to be processed, and aqueduct (4) is done under the drive of motor (1) and the reciprocal rotation of tubing to be processed (8).
4. laser cutting machine according to claim 1 is characterized in that 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 an end of water inlet is connected water tank upper, and the other end links to each other with the water source by magnetic valve; One end of water pipe is positioned at the bottom or the side of water tank, and is positioned at below the liquid level line; The other end of water pipe links to each other with centrifugal pump, and an end of delivery port is positioned on the centrifugal pump, and the other end links to each other with the aqueduct of the preposition spray water distributor of laser cutting machine, and liquid level sensor, magnetic valve, centrifugal pump are by Controlled by Programmable Controller.
5. laser cutting machine according to claim 1, it is characterized in that described coaxial water jet device is hollow cylindrical, there is photoelectric sensor mount pad (3) upper end, photoelectric sensor (1) and photoelectric sensor focusing knob (2) be located at photoelectric sensor mount pad (3) above, below the photoelectric sensor mount pad (3), coaxial water jet device inside is provided with 45
0Speculum (4) is with 45
0On the corresponding cylindrical sidewall of speculum (4), be provided with lighting source (5), be provided with laser generator (6), 45 below the lighting source (5)
0Be provided with focus lamp (7) below the speculum (4); the cylindrical sidewall that focus lamp (7) is corresponding is provided with focus lamp focusing differential head (8); be provided with protective glass (9) below the focus lamp (7); protective glass (9) following for having double-deck nozzle (11); water jet (12) passes through between nozzle (11) double-decker, and nozzle (11) is connected with high service unit (10) by the water inlet on the sidewall (13).
6. laser cutting machine according to claim 5 is characterized in that laser generator (6) is the optical-fiber laser generator; Nozzle (11) is annular, and water jet (12) is column; Focus lamp focusing differential head (8) is used for level or vertical adjusting focus lamp (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015897.6A CN103212805B (en) | 2012-01-19 | 2012-01-19 | Containing the laser cutting machine of preposition spray water guide structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015897.6A CN103212805B (en) | 2012-01-19 | 2012-01-19 | Containing the laser cutting machine of preposition spray water guide structure |
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| CN103212805A true CN103212805A (en) | 2013-07-24 |
| CN103212805B CN103212805B (en) | 2015-12-02 |
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Citations (7)
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|---|---|---|---|---|
| GB2252933A (en) * | 1991-02-21 | 1992-08-26 | Synthes | Method and apparatus for laser cutting a hollow metal workpiece. |
| JPH1190661A (en) * | 1997-09-24 | 1999-04-06 | Olympus Optical Co Ltd | Method and device for laser beam machining |
| JP2001129685A (en) * | 1999-11-02 | 2001-05-15 | Nisshin Steel Co Ltd | Inner surface shield jig for manufacturing metal welded pipe |
| JP2010110775A (en) * | 2008-11-05 | 2010-05-20 | Amada Co Ltd | Thermal cutting apparatus |
| KR20100071577A (en) * | 2008-12-19 | 2010-06-29 | 재단법인 포항산업과학연구원 | Apparatus for welding a pipe and method of welding a pipe by using the same |
| CN201856036U (en) * | 2007-11-07 | 2011-06-08 | 通快机床两合公司 | Laser processing equipment with mechanism for spraying and/or cooling inner wall of pipe fitting |
| CN202506965U (en) * | 2012-01-19 | 2012-10-31 | 昆山思拓机器有限公司 | Laser cutting machine with front spray water guide structure |
-
2012
- 2012-01-19 CN CN201210015897.6A patent/CN103212805B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252933A (en) * | 1991-02-21 | 1992-08-26 | Synthes | Method and apparatus for laser cutting a hollow metal workpiece. |
| JPH1190661A (en) * | 1997-09-24 | 1999-04-06 | Olympus Optical Co Ltd | Method and device for laser beam machining |
| JP2001129685A (en) * | 1999-11-02 | 2001-05-15 | Nisshin Steel Co Ltd | Inner surface shield jig for manufacturing metal welded pipe |
| CN201856036U (en) * | 2007-11-07 | 2011-06-08 | 通快机床两合公司 | Laser processing equipment with mechanism for spraying and/or cooling inner wall of pipe fitting |
| JP2010110775A (en) * | 2008-11-05 | 2010-05-20 | Amada Co Ltd | Thermal cutting apparatus |
| KR20100071577A (en) * | 2008-12-19 | 2010-06-29 | 재단법인 포항산업과학연구원 | Apparatus for welding a pipe and method of welding a pipe by using the same |
| CN202506965U (en) * | 2012-01-19 | 2012-10-31 | 昆山思拓机器有限公司 | Laser cutting machine with front spray water guide structure |
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