CN103817430A - Electromagnetically-assisted laser drilling method and device - Google Patents
Electromagnetically-assisted laser drilling method and device Download PDFInfo
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- CN103817430A CN103817430A CN201410050557.6A CN201410050557A CN103817430A CN 103817430 A CN103817430 A CN 103817430A CN 201410050557 A CN201410050557 A CN 201410050557A CN 103817430 A CN103817430 A CN 103817430A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005553 drilling Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 21
- 230000005284 excitation Effects 0.000 claims description 23
- 238000004080 punching Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
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- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 238000011017 operating method Methods 0.000 abstract 1
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- 238000005516 engineering process Methods 0.000 description 3
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- 230000005611 electricity Effects 0.000 description 2
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- 238000002309 gasification Methods 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
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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
- B23K26/0823—Devices involving rotation of the workpiece
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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
- B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
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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
- B23K26/382—Removing material by boring or cutting by boring
Abstract
The invention provides an electromagnetically-assisted laser drilling method. The method includes the steps of 1, clamping a workpiece to be processed onto an electromagnetically-assisted laser drilling device; 2, driving a fixture base to rotate by a motor so that a permanent magnet clamped on the fixture base rotates at high speed and forms a rotational magnetic field; meanwhile, allowing a mouse cage in the rotational magnetic field to produce electromagnetic force whereby the workpiece rotates in sync with the mouse cage; 3, after the speed of the motor stabilizes to a preset value, starting a laser, which generates a laser beam acting on the surface of the workpiece via a focusing lens so as to finish the electromagnetically-assisted laser drilling process. According to the method, the application of the operating method of rotating the workpiece enhances the assistance of the magnetic field in laser drilling; meanwhile, the rotational magnetic field can control motion of plasma and molten metal generated in the laser drilling process, so that laser drilling effect is optimized. The invention further provides the electromagnetically-assisted laser drilling device.
Description
Technical field
The invention belongs to field of laser processing, be specifically related to a kind of electromagnetism auxiliary laser drilling method and device.
Background technology
In machining, hole processing is one important manufacturing procedure that accounting is larger, along with the miniaturization of part, produce quantitatively, common machine drilling method is difficult to realize large batch of aperture, the manufacture of micropore, laser boring is one of the key technology in Modern Manufacturing Technology field, it is large that laser boring has punching aspect ratio compared with other drilling methods, contactless, without tool loss, process velocity is fast, areal deformation is little, can process the remarkable superiority such as various materials, can meet well the requirement of Modern Industry Products processing, be widely used, the for example processing of aircraft engine wormwheel blade louvre.
Existing laser boring method is generally that laser beam is focused on to following certain position of surface of the work or surface, with sufficiently high power density heating and melting material, material ejects and reaches the object that material is removed with liquid and gaseous form subsequently, in this process, conventionally punch position inject high pressure assist gas with improve perforating efficiency and punching effect.But existing laser boring method has following shortcoming: 1. laser drilling process ionic medium screen effect is serious, causes the loss of laser energy; 2. after processing there is the recast layer of uneven thickness and affect the quality in hole in hole wall; 3. the impulsive force that produces in the laser drilling process of high-energy long pulse is excessive causes the hole repeatable accuracy that processes low, and hole wall exists micro-crack, and the difficult quality in hole improves.
The method of existing magnetic field assistant laser welding and unit in prior art although (such as the patent No. Chinese invention patent " a kind of magnetic field assistant laser welding unit " that is 200410101556.6), but because laser weld is different from the feature of punching, can not be applicable to laser boring for the unit of laser weld.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of electromagnetism auxiliary laser drilling method is provided; The method has adopted the working method of workpiece rotation, and magnetic field is strengthened the auxiliaring effect of laser boring; Simultaneously rotating excitation field can also be controlled the plasma that produces in laser drilling process and the motion of motlten metal, has optimized laser boring effect; The present invention also provides a kind of electromagnetism auxiliary laser perforating device simultaneously.
The present invention is achieved through the following technical solutions:
A kind of electromagnetism auxiliary laser drilling method, comprises the following steps:
(1) by clamping workpiece to be processed on electromagnetism auxiliary laser perforating device;
Described electromagnetism auxiliary laser perforating device comprises laser generating unit, clamping workpiece unit, rotating excitation field generation unit and driver element; Described laser generating unit comprises laser instrument and condenser lens, acts on the surface of workpiece to be processed after the laser beam line focus lens focus of laser instrument output;
Described clamping workpiece unit comprises main shaft, base plate, clutch shaft bearing and mouse cage; Described main shaft is fixedly mounted on a side of base plate, and main shaft is multidiameter, and on main shaft, shaft part is provided with clutch shaft bearing, and mouse cage is arranged on clutch shaft bearing;
Described mouse cage is made up of the 3rd screw, mouse cage top board, copper post and mouse cage base plate, mouse cage top board is connected with mouse cage base plate by copper post, and copper post forms a circle, and is uniformly distributed, the 3rd screw is positioned on mouse cage top board, and workpiece to be processed is fixed on mouse cage by the 3rd screw;
Described rotating excitation field generation unit comprises the first screw, two magnet fixtures, paired permanent magnet, the second screw, clamp base, the second bearing, wherein, the second bearing is installed on the middle part shaft part of main shaft, on the second bearing, coordinate sectional fixture base, two magnet fixtures are symmetrically fixed in clamp base by the second screw, each permanent magnet all by the first screw in compression on magnet fixture; Paired permanent magnet is symmetrically distributed in clamp base; The centre position of described workpiece in magnet fixture, striking work not in magnet fixture rotary course;
Described driver element is made up of motor support base, motor, belt wheel and belt; Motor support base is fixed on base plate, and on motor support base, vertical mounted motor, installs belt wheel on electric machine main shaft, and the belt grooves of belt wheel and the belt grooves of clamp base are arranged on same level position, and belt is pressed in the belt grooves of belt wheel and the belt grooves of clamp base;
(2) drive clamp base rotation by motor, make the permanent magnet high-speed rotary of clamping in clamp base then formation rotating excitation field; Meanwhile, rotating excitation field produces electromagnetic force in mouse cage, and electromagnetic force makes workpiece follow mouse cage synchronous rotary;
(3) until the velocity-stabilization of motor after preset value, open laser instrument, the laser beam that laser instrument produces acts on the surface of workpiece by condenser lens, complete electromagnetism auxiliary laser punching process.
The present invention also provides a kind of electromagnetism auxiliary laser perforating device simultaneously, comprises laser generating unit, clamping workpiece unit, rotating excitation field generation unit and driver element;
Described laser generating unit comprises laser instrument and condenser lens, acts on the surface of workpiece to be processed after the laser beam line focus lens focus of laser instrument output;
Described clamping workpiece unit comprises main shaft, base plate, clutch shaft bearing and mouse cage; Described main shaft is fixedly mounted on a side of base plate, and main shaft is multidiameter, and on main shaft, shaft part is provided with clutch shaft bearing, and mouse cage is arranged on clutch shaft bearing;
Described mouse cage is made up of the 3rd screw, mouse cage top board, copper post and mouse cage base plate, mouse cage top board is connected with mouse cage base plate by copper post, and copper post forms a circle, and is uniformly distributed, the 3rd screw is positioned on mouse cage top board, and workpiece to be processed is fixed on mouse cage by the 3rd screw;
Described rotating excitation field generation unit comprises the first screw, magnet fixture, permanent magnet, the second screw, clamp base, the second bearing, wherein, the second bearing is installed on the middle part shaft part of main shaft, on the second bearing, coordinate sectional fixture base, two magnet fixtures are symmetrically fixed in clamp base by the second screw, and permanent magnet passes through the first screw in compression on magnet fixture;
Described driver element is made up of motor support base, motor, belt wheel and belt; Motor support base is fixed on base plate, and on motor support base, vertical mounted motor, installs belt wheel on electric machine main shaft, and the belt grooves of belt wheel and the belt grooves of clamp base are arranged on same level position, and belt is pressed in the belt grooves of belt wheel and the belt grooves of clamp base.
Further, described clamp base is disc-shaped structure.
Further, clamp base is provided with many row's screwed holes, for adjusting the distance of magnet clamp distance clamp base center.
Further, described permanent magnet can be selected required permanent magnet type according to processing request, and permanent magnet can be made up of the stack of polylith permanent magnet simultaneously.
Further, the motor that described motor is variable-ratio.
The present invention has following beneficial effect:
1, laser boring plasma density with respect to laser weld is much smaller, is mainly that speed and the flow of air-flow causes, and while punching, air-flow is very strong, has dispelled plasma.Therefore traditional electromagnetism householder method for welding can not simply be applicable to laser drilling process.The present invention adopts mouse cage type structure greatly to strengthen the effect in magnetic field, and electromagnetism householder method also can be suitable for for weak plasma situation.
2, the workpiece rotary work mode that the present invention adopts can be brought the centrifugal force effect of laser molten pool, makes molten metal liquid that strong splashing, then steam raising occur under the effect of centrifugal force; This evaporation has further strengthened the density of plasma; The principle of its enhancing is that laser irradiation is on the metal ion of gasification, make it plasma, with respect to only rotating the hole knockout that does not add magnetic field, the effect in magnetic field can be removed the plasma after this enhancing, thereby magnetic field is strengthened the auxiliaring effect of laser boring.On the other hand, metal liquid is under the effect of centrifugal force, and trend hole wall, makes centre, molten bath expose solid-state metal, is conducive to the energy of absorbing laser effect more fully, thereby strengthens the punching degree of depth.
3, the present invention controls the motion of the plasma producing in punching process by applying the magnetic field perpendicular with the direction of punching, and makes it avoid laser incident direction, has reduced the loss of laser energy, has improved perforating efficiency.Control the motion of plasma simultaneously, scatter rapidly after can making it depart from hole, reduced aperture pressure, molten metal in hole, plasma can more promptly be sprayed, acceleration punching process.Due to isoionic rapid ejection, hole internal pressure is declined, reduce the impulsive force that produces in punching process, reduce hole wall and produced the probability of micro-crack, improve drilling quality.
4, the present invention's stirring to motlten metal in hole by rotating excitation field, is evenly attached on hole wall it, repairs the micro-crack of hole wall, has reduced the randomness of punching process, has improved the circularity precision in punching repeatability precision and hole.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structure chart of electromagnetism auxiliary laser perforating device of the present invention;
Fig. 2 is the structure chart of mouse cage of the present invention;
Fig. 3 is the schematic diagram of the invention process process;
In figure, the implication of each label is as follows:
1, the first screw, 2, magnet fixture, 3, mouse cage, 4, condenser lens, 5, laser beam, 6, workpiece, 7, clutch shaft bearing, 8, permanent magnet, 9, clamp base, 10, motor, 11, base plate, 12, the second bearing, 13, main shaft, 14, the second screw, 15, belt, 16, belt wheel, 17, motor support base, 18, the 3rd screw, 19, mouse cage top board, 20, copper post, 21, mouse cage base plate, 22, magnetic field rotating direction, 23, magnetic field, 24, plasma, 25, motlten metal.
The specific embodiment
Describe the method for the present invention's proposition and details and the working condition of device in detail below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein, only for explaining the present invention, is not intended to limit the present invention.
The invention provides a kind of electromagnetism auxiliary laser perforating device (as depicted in figs. 1 and 2), comprise four parts, is respectively laser generating unit, clamping workpiece unit, rotating excitation field generation unit and driver element.
Described laser generating unit comprises laser instrument and condenser lens 4, acts on the surface of workpiece to be processed 6 after the laser beam line focus lens 4 of laser instrument output focus on;
Described clamping workpiece unit comprises main shaft 13, base plate 11, clutch shaft bearing 7 and mouse cage 3, and wherein, main shaft 13 is fixedly mounted on a side of base plate 11, and main shaft 13 is multidiameter, and on main shaft 13, shaft part is provided with clutch shaft bearing 7, and mouse cage 3 is arranged on clutch shaft bearing 7.
Described mouse cage 3 is made up of the 3rd screw 18, mouse cage top board 19, copper post 20 and mouse cage base plate 21, wherein, mouse cage top board 19 is connected with mouse cage base plate 21 by copper post 20, copper post 20 forms a circle, be uniformly distributed, the 3rd screw 18 is positioned on mouse cage top board 19, and workpiece 6 is fixed on mouse cage 3 by tightening the 3rd screw 18.
Described rotating excitation field generation unit comprises the first screw 1, two magnet fixtures 2, paired permanent magnet 8, the second screw 14, clamp base 9, the second bearing 12, wherein, the second bearing 12 is installed on the middle part shaft part of main shaft 13, on the second bearing 12, coordinate sectional fixture base 9, two magnet fixtures 2 are symmetrically fixed in clamp base 9 by the second screw 14, and each permanent magnet 8 is all pressed on magnet fixture 2 by the first screw 1; Wherein, permanent magnet 8 can be selected required permanent magnet type according to processing request, and the quantity of permanent magnet 8 also can be selected according to actual needs.
Described driver element is made up of motor support base 17, motor 10, belt wheel 16, belt 15; Motor support base 17 is fixed on base plate 11, vertical mounted motor 10 on motor support base 17, belt wheel 16 is installed on electric machine main shaft, and the belt grooves of the belt grooves of belt wheel 16 and clamp base 9 is arranged on same level position, and belt 15 is pressed in the belt grooves of belt wheel 16 and the belt grooves of clamp base 9.
Electromagnetism auxiliary laser drilling method provided by the invention specifically comprises the steps:
(1) workpiece 6 that is of a size of 50mm × 50mm × 10mm is clamped on the middle mouse cage 3 of rotating excitation field, guarantees not strike workpiece 6 in magnet fixture 2 rotary courses;
Selected magnetic field intensity parameter is respectively: single permanent magnet 8 Surface field intensity 8500G, and two symmetrical installations of permanent magnet 8, the distance between the permanent magnet 8 of symmetrical clamping is 60mm;
(2) rotating speed that presets motor 10 is 1500r/min, starter motor 10, motor 10 drives clamp base 9 by belt wheel 16, belt 15, make permanent magnet 8 high-speed rotaries of clamping in clamp base 9 then formation rotating excitation field, wherein the diameter ratio of clamp base 9 and belt wheel 16 is 1.5, and therefore the rotating speed of rotating excitation field is 1000r/min; Meanwhile, rotating excitation field produces electromagnetic force in mouse cage 3, and electromagnetic force makes workpiece 6 follow mouse cage 3 synchronous rotaries;
(3) until the velocity-stabilization of motor 10 after preset value (1500r/min), open laser instrument, the laser beam 5 that laser instrument produces acts on the surface of workpiece 6 by condenser lens 4, complete electromagnetism auxiliary laser punching process.Wherein, laser parameter respectively: laser power 2000W, laser pulse width 0.5ms, laser frequency 100Hz, laser defocusing amount 0.
Operation principle of the present invention as shown in Figure 3, according to charged particle laws of motion in magnetic field, when charged particle enters in a uniform magnetic field with speed v, it will receive that power F=qv × B(q is particle carried charge) effect, this power velocity attitude total and charged particle is perpendicular, to change therefore enter the direction of motion of the charged particle in magnetic field, charged particle will circle in perpendicular to H plane, and positive and negative particle is made rightabout circular motion.Due in punching process, plasma 24 sharply expands in hole, after making hole internal pressure reach extreme value, blast outside squit hole, the therefore moment outside plasma 24 squit holes, what the direction of motion of the charged particle in plasma 24 can be similar to regards identical with laser incident direction as.If exist one with the perpendicular magnetic field 23 of punching direction, positive and negative charged particle in plasma 24 will change the direction of motion, both sides to punching direction move in a circle, when magnetic direction is during as shown in Figure 3 perpendicular to paper incident, positive electricity particle in plasma 24 departs from center left, negative electricity particle in plasma 24 departs from center to the right, therefore, plasma 24 has been avoided laser incident direction, reduce absorbing again laser energy, also sharply reduced near the pressure in aperture simultaneously, make the motlten metal 25 in hole, plasma 24 can more efficient tap outside.
Simultaneously, magnetic field by rotation makes to produce induced-current in workpiece 6, thereby making has electric current to pass through in the motlten metal 25 in process, the electromagnetic force that electric current and magnetic field interaction produce forms stirring action to motlten metal 25, mixing direction is consistent with magnetic field rotating direction 22, make it spouting in the shape of a spiral, be attached to uniformly on hole wall.
In addition, rotating excitation field acts on rotatable mouse cage 3, in mouse cage 3, produce induced-current, induced-current and rotating excitation field interact and produce electromagnetic force, electromagnetic force makes mouse cage 3 can follow rotating excitation field to rotate together, mouse cage 3 and then drive workpiece rotate together, and the motlten metal 25 of the centrifugal action that the rotation of workpiece 6 produces in hole, is attached on hole wall it more uniformly.
It is apparent to one skilled in the art that the present invention can change into various ways, and such change is not thought and departed from the scope of the present invention.All so apparent modifications of the technical staff to described field, within being included in the scope of this claim.
Claims (6)
1. an electromagnetism auxiliary laser drilling method, is characterized in that, comprises the following steps:
(1) workpiece to be processed (6) is clamped on electromagnetism auxiliary laser perforating device;
Described electromagnetism auxiliary laser perforating device comprises laser generating unit, clamping workpiece unit, rotating excitation field generation unit and driver element; Described laser generating unit comprises laser instrument and condenser lens (4), acts on the surface of workpiece to be processed (6) after the laser beam line focus lens (4) of laser instrument output focus on;
Described clamping workpiece unit comprises main shaft (13), base plate (11), clutch shaft bearing (7) and mouse cage (3); Described main shaft (13) is fixedly mounted on a side of base plate (11), and main shaft (13) is multidiameter, at the upper shaft part of main shaft (13), clutch shaft bearing (7) is installed, and mouse cage (3) is arranged on clutch shaft bearing (7);
Described mouse cage (3) is made up of the 3rd screw (18), mouse cage top board (19), copper post (20) and mouse cage base plate (21), mouse cage top board (19) is connected with mouse cage base plate (21) by copper post (20), copper post (20) forms a circle, be uniformly distributed, it is upper that the 3rd screw (18) is positioned at mouse cage top board (19), and workpiece (6) to be processed is fixed on mouse cage (3) by the 3rd screw (18);
Described rotating excitation field generation unit comprises the first screw (1), two magnet fixtures (2), paired permanent magnet (8), the second screw (14), clamp base (9), the second bearing (12), wherein, the second bearing (12) is installed on the middle part shaft part of main shaft (13), the upper sectional fixture base (9) that coordinates of the second bearing (12), it is upper that two magnet fixtures (2) are symmetrically fixed on clamp base (9) by the second screw (14) respectively, and each permanent magnet (8) is all pressed on a magnet fixture (2) by the first screw (1); All permanent magnets (8) are symmetrically distributed in clamp base (9); The centre position of described workpiece (6) in magnet fixture (2), striking work (6) not in magnet fixture (2) rotary course;
Described driver element is made up of motor support base (17), motor (10), belt wheel (16) and belt (15); Motor support base (17) is fixed on base plate (11), the upper vertical mounted motor (10) of motor support base (17), belt wheel (16) is installed on electric machine main shaft, the belt grooves of the belt grooves of belt wheel (16) and clamp base (9) is arranged on same level position, and belt (15) is pressed in the belt grooves of belt wheel (16) and the belt grooves of clamp base (9);
(2) drive clamp base (9) rotation by motor (10), make permanent magnet (8) high-speed rotary of clamping in clamp base (9) then formation rotating excitation field; Meanwhile, rotating excitation field produces electromagnetic force in mouse cage (3), and electromagnetic force makes workpiece (6) follow mouse cage (3) synchronous rotary;
(3) until the velocity-stabilization of motor (10) after preset value, open laser instrument, the laser beam (5) that laser instrument produces acts on the surface of workpiece (6) by condenser lens (4), complete the electromagnetism auxiliary laser process of punching.
2. an electromagnetism auxiliary laser perforating device, is characterized in that, comprises laser generating unit, clamping workpiece unit, rotating excitation field generation unit and driver element;
Described laser generating unit comprises laser instrument and condenser lens (4), acts on the surface of workpiece to be processed (6) after the laser beam line focus lens (4) of laser instrument output focus on;
Described clamping workpiece unit comprises main shaft (13), base plate (11), clutch shaft bearing (7) and mouse cage (3); Described main shaft (13) is fixedly mounted on a side of base plate (11), and main shaft (13) is multidiameter, at the upper shaft part of main shaft (13), clutch shaft bearing (7) is installed, and mouse cage (3) is arranged on clutch shaft bearing (7);
Described mouse cage (3) is made up of the 3rd screw (18), mouse cage top board (19), copper post (20) and mouse cage base plate (21), mouse cage top board (19) is connected with mouse cage base plate (21) by copper post (20), copper post (20) forms a circle, be uniformly distributed, it is upper that the 3rd screw (18) is positioned at mouse cage top board (19), and workpiece (6) to be processed is fixed on mouse cage (3) by the 3rd screw (18);
Described rotating excitation field generation unit comprises the first screw (1), two magnet fixtures (2), paired permanent magnet (8), the second screw (14), clamp base (9), the second bearing (12), wherein, the second bearing (12) is installed on the middle part shaft part of main shaft (13), the upper sectional fixture base (9) that coordinates of the second bearing (12), it is upper that two magnet fixtures (2) are symmetrically fixed on clamp base (9) by the second screw (14) respectively, and each permanent magnet (8) is all pressed on a magnet fixture (2) by the first screw (1); All permanent magnets (8) are symmetrically distributed in clamp base (9);
Described driver element is made up of motor support base (17), motor (10), belt wheel (16) and belt (15); Motor support base (17) is fixed on base plate (11), the upper vertical mounted motor (10) of motor support base (17), belt wheel (16) is installed on electric machine main shaft, the belt grooves of the belt grooves of belt wheel (16) and clamp base (9) is arranged on same level position, and belt (15) is pressed in the belt grooves of belt wheel (16) and the belt grooves of clamp base (9).
3. electromagnetism auxiliary laser perforating device according to claim 2, is characterized in that, described clamp base (9) is disc-shaped structure.
4. electromagnetism auxiliary laser perforating device according to claim 2, is characterized in that, clamp base (9) is provided with many row's screwed holes, for adjusting the distance of magnet fixture (2) apart from clamp base (9) center.
5. electromagnetism auxiliary laser perforating device according to claim 2, is characterized in that, described permanent magnet (8) is made up of the stack of polylith permanent magnet.
6. electromagnetism auxiliary laser perforating device according to claim 2, is characterized in that, the motor that described motor (10) is variable-ratio.
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| CN201410050557.6A CN103817430B (en) | 2014-02-13 | 2014-02-13 | A kind of electromagnetism auxiliary laser drilling method and device |
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| CN201410050557.6A CN103817430B (en) | 2014-02-13 | 2014-02-13 | A kind of electromagnetism auxiliary laser drilling method and device |
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| CN103817430B CN103817430B (en) | 2015-08-12 |
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| CN112958923A (en) * | 2019-10-29 | 2021-06-15 | 江苏华源节水股份有限公司 | Laser hole making method for drip irrigation tape |
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| CN111112839A (en) * | 2020-01-06 | 2020-05-08 | 南京航空航天大学 | Double-laser-beam bilateral synchronous welding device and method assisted by external magnetic field |
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| CN112222549A (en) * | 2020-09-15 | 2021-01-15 | 江苏大学 | Device and method for laser-electrochemical composite drilling of inclined magnetic cathode plate |
| CN113172334A (en) * | 2021-04-27 | 2021-07-27 | 天津工业大学 | Rotating magnetic field and ultrasonic vibration assisted laser processing device |
| CN113172334B (en) * | 2021-04-27 | 2022-09-23 | 天津工业大学 | Rotating magnetic field and ultrasonic vibration assisted laser processing device |
| CN113857657A (en) * | 2021-09-07 | 2021-12-31 | 江苏大学 | Device and method for assisting femtosecond laser layer-feeding type spiral hole cutting by using water-based rotating magnetic field |
| CN113857657B (en) * | 2021-09-07 | 2024-03-19 | 江苏大学 | Device and method for assisting femtosecond laser layer progressive spiral hole cutting by using water-based rotating magnetic field |
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