CN206768218U - Remove the laser cladding apparatus of laser cladding layer stomata/field trash - Google Patents
Remove the laser cladding apparatus of laser cladding layer stomata/field trash Download PDFInfo
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- CN206768218U CN206768218U CN201720447662.2U CN201720447662U CN206768218U CN 206768218 U CN206768218 U CN 206768218U CN 201720447662 U CN201720447662 U CN 201720447662U CN 206768218 U CN206768218 U CN 206768218U
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Abstract
The utility model belongs to Materialbearbeitung mit Laserlicht technical field, more particularly to a kind of laser cladding apparatus for removing laser cladding layer stomata/field trash, it includes workbench, the laser cladding powder sending device being arranged in front of workbench and the laser Compound Machining head above workbench, laser Compound Machining head includes electrode, induction coil, laser light conducting cylinder, magnet, work magnetic pole I and work magnetic pole II, magnet is that action of alternating magnetic field is provided between work magnetic pole I and work magnetic pole II in the surface of workpiece, laser cladding powder sending device is that workpiece surface adds laser cladding of material, laser output laser beam carries out laser melting coating in workpiece surface.The invention also discloses a kind of laser cladding method for removing laser cladding layer stomata/field trash.The utility model can reduce stomata and non-metallic inclusion in aluminium alloy laser cladding layer, significantly improve the quality of laser cladding layer, have important application value.
Description
Technical field
The utility model belongs to Materialbearbeitung mit Laserlicht technical field, and laser cladding layer gas is removed more particularly, to one kind
The laser cladding apparatus of hole/field trash.
Background technology
Stomata in laser cladding layer is common deficiency, has the reason for considerable influence, generation stomata to the quality of cladding layer
It is more, for example, during using mull technique preset coating material, if binding agent selection is improper, it is easy to produce laser melting coating stomata.
In the case of automatic powder feeding, for the laser melting coating of high carbon alloy, copper alloy, aluminium alloy etc., also easily there is cladding
Layer stomata.
At present, avoiding the method for laser cladding layer stomata has two kinds, and the first is to make the certainly molten of deoxidier using B, Si etc.
Alloy, its advantage are that alloy is produced from protective effect, and slag making is few, effect is good；Its shortcoming is that B, Si have certain side effect.The
Two kinds are inert gas shieldings, are not change the normal alloying component of cladding layer the advantages of this method；Shortcoming is protecting effect
It is limited.
The method of above two prevention cladding layer stomata is primarily adapted for use in conventional steel alloy, higher for thermal conductivity
Copper, aluminium alloy, the stomata problem in its laser cladding layer is difficult to solve always, because the gas in copper, aluminium alloy laser cladding layer
Hole is mainly as caused by hydrogen；And the thermal conductivity of this kind of alloy is good, setting rate is fast, and the gas in molten bath is difficult to escape, so
Stomata is more readily formed.By taking aluminium alloy as an example, its forming reason of porosity is：Be dissolved in during high temperature hydrogen concentration in liquid metals compared with
High (0.69ml/g), the hydrogen concentration dissolved in solids during low temperature drastically declines (0.036ml/g), under poised state, aluminium alloy
About 20 times are reduced in the front and rear solubility of solidification, this is one of easy the main reason for producing stomata in welded seam of aluminium alloy.
Non-metallic inclusion in aluminum melt is with Al2O3Based on, influence of the field trash to aluminium alloy capability is embodied in following several
Individual aspect：1. significantly reduce the mechanical property and stress corrosion resistant ability of material；2. form slag inclusion, oxide-film etc. in the material to lack
Fall into, reduce product quality；3. adsorbed gas, and the diffusion and precipitation of retardation gases, cause loose and stomata.Due in aluminum melt
Al2O3It is strong Deng non-metallic inclusion hydrogen-absorbing ability, when the hydrogen atom increase of absorption, bubble will be accumulated on field trash surface.
Non-metallic inclusion Al2O3(density 3.96g/cm3), MgO (density 3.58g/cm3)、SiO2(density 2.65g/cm3) etc. attached
After bubble hydrogen, its density and aluminum melt (2.3~2.4g/cm of density3) quite, the diverse location of melt can be suspended in.
Therefore, must removal of inclusions while dehydrogenation in aluminium alloy.
At present, in addition to laser melting coating, laser fast forming manufacture are carried out in vacuum tank or inert gas cavity room, greatly
Stomata under compression ring border in aluminium alloy automatic powder feeding laser cladding layer is still difficult to avoid that, and situation is than more serious.
In addition, on influence of the magnetic field to metallicity in laser action molten bath, domestic and foreign scholars have also carried out beneficial
Research, O.Velde etc. have studied in aluminum alloy surface alloying process, and the Lorentz force of static magnetic field is in molten bath
Marangoni convection current and the influence of solute Distribution state.M.Bachmann etc. have studied permanent magnet static magnetic field and electromagnet is handed over
Varying magnetic field is to improving the splashing effect in welded seam of aluminium alloy section and surface topography, and suppression welding process.2013 open
Utility model patent " static magnetic field-laser coaxial composite cladding method and device (application number 201310755461.5) ", lead to
Cross static magnetic field device and realize the leveling flowed to molten bath caused by laser, so as to reach regulation and control solidified structure, improve cladding
Layer surface pattern, optimizing stress distribution, reduce the purpose of splash phenomena in cladding process；Utility model disclosed in 2014
Patent " a kind of method and device (application number 201410392196.3) of the compound field coordination laser melting coating of electricity-magnetic ", by outer power-up
Field and externally-applied magnetic field couple within the workpiece simultaneously, the conductor fluid of molten bath zone is acted synergistically by electricity-magnetic Composite Field, adjust
The heat and mass behavior in laser cladding process is controlled, the taxis control of molten bath convection current can be achieved, reach regulation and control solidified structure, excellent
Chemical industry part mechanical property, adjust solute element or additional hard distributed mutually, improve the purpose of clad layer surface pattern；Public affairs in 2012
Utility model patent " a kind of method and its device (application number of alternating magnetic field refining laser cladding layer solidified structure opened：
201210225593.2) ", by placing coil device in workpiece surface, cladding layer solidified structure shape is changed using alternating magnetic field
State, and crystal grain thinning.But the studies above is to improve the surface topography of cladding layer itself and tissue morphology using magnetic field, subtracting
Few splashing etc. is studied, and does not relate to remove the stomata and field trash in laser cladding layer.
Due to drawbacks described above and deficiency be present, this area is needed badly to make and further improved, and designs a kind of remove
The apparatus and method for removing laser cladding layer stomata/field trash, meet removal of impurities needs of all kinds of melts in laser melting coating.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, the utility model provides a kind of removal laser cladding layer gas
The laser cladding apparatus in hole/be mingled with, it uses the alternating magnetic field based on particular design to carry out laser-induction composite cladding, passed through
Induct electromagnetic force of the charged particle in alternating magnetic field, aid in removing the stomata in cladding layer, be mingled with, aluminium conjunction can be significantly reduced
Stomata and non-metallic inclusion in golden laser cladding layer, the quality of laser cladding layer is significantly improved, meets different types of work
The needs of part laser melting coating.
To achieve the above object, according to the utility model, there is provided a kind of stomata and field trash for removing laser cladding layer
Laser cladding apparatus, it is characterised in that it include workbench, the laser cladding powder sending device being arranged in front of the workbench and
Laser Compound Machining head above the workbench, wherein：
Workpiece (8) is placed on the workbench (9), and the laser Compound Machining head includes electrode (3), induction coil
(4), laser light conducting cylinder (5), magnet (7), work magnetic pole I (7.1) and work magnetic pole II (7.2), wherein the work magnetic pole I
(7.1) and the work magnetic pole II (7.2) is oppositely arranged on the magnet (7) one end, and has certain interval between each other；Institute
Laser light conducting cylinder (5) and the workpiece (8) is stated respectively to be located between the work magnetic pole I (7.1) and work magnetic pole II (7.2)
The bottom of the surface and underface in gap, the work magnetic pole I (7.1) and the work magnetic pole II (7.2) and the workpiece
(8) surface is spaced apart；The induction coil (4), and the sensing are coated with the crossbeam of magnet (7) other end
The both ends of coil (4) are stretched out to be connected with the electrode (3), and laser (1) is additionally provided with front of the electrode (3), described to swash
Light device (1) passes through the work by light path system and the laser light conducting cylinder (5) outgoing laser beam (6), this laser beam (6)
Gap between magnetic pole I (7.1) and the work magnetic pole II (7.2) is radiated at the workpiece (8) surface and carries out laser melting coating.
Specifically, laser cladding powder sending device by powder-feeding mouth to matrix surface automatic transport laser cladding of material, in cladding
While supplemented, material can be made progressively cladding and gas and field trash can be made to be easier to discharge from deposited metals.
Laser carries out laser melting coating by light path system to matrix surface outgoing laser beam, and induction power supply is by the magnetic pole that works to matrix
And cladding layer applies alternating magnetic field, open and close and its work of control system control laser, laser cladding powder sending device and induction power supply
Related process parameters when making.
It is further preferred that the laser cladding apparatus also includes digital control system and the induction power supply being connected with the electrode,
The digital control system controls laser, the laser cladding powder sending device, the induction power supply and the workbench, the sense
Power supply is answered then to control the alternating magnetic field between the work magnetic pole I and the work magnetic pole II.Using digital control system and induced electricity
Source is controlled, and can be precisely controlled parameter, powder feeding time and the powder sending quantity of laser beam, is made the change of alternating magnetic field expire
Foot removal of impurities and the needs for removing gas.
Preferably, the material of the magnet is silicon steel sheet, ferrite, permalloy or Pure iron, the work magnetic pole I
Work magnetic pole II and magnet between structure be same material formed integral structure, or different materials formed separation
Structure.More comparative test shows that above-mentioned material is respectively provided with higher saturation magnetization, and easy magnetization, easy degaussing, is adapted to
Used under alternating magnetic field.And magnet and magnetic pole are subjected to integrated design or isolating construction design as needed, then it can expire
The use of sufficient different situations needs.
Preferably, spacing a scope is 5mm~30mm between the work magnetic pole I and work magnetic pole II；The work magnetic
Pole I and the work bottom surface of magnetic pole II and workpiece surface spacing h scope are 0.5mm~15mm.More comparative test shows, incites somebody to action
Above-mentioned spacing a and h control can pass through in suitable scope in the nozzle for ensureing laser and laser cladding powder sending device
Under the premise of, workpiece surface is in alternating magnetic field as much as possible, make gas and field trash be easier to discharge.
Preferably, the induction coil is the coil of enamel-covered wire, the coil of cable winding or copper pipe coiling, induction coil
It is electrically insulated per between circle coil.
The utility model additionally provides a kind of laser cladding method for removing laser cladding layer stomata/field trash, its feature
It is, it uses the laser cladding apparatus of the stomata and field trash as described above for removing laser cladding layer, specifically includes following
Step：
S1. cleaned up after ready workpiece being carried out into mechanical grinding, fixation is stand-by on the table, while will swash
Light cladding material carries out high temperature drying dewater treatment, is put into after cooling stand-by in laser cladding powder sending device；
S2. the laser in laser cladding apparatus is opened, will in workpiece surface, laser cladding powder sending device by laser beam focus
Laser cladding of material is delivered at the laser facula of work-piece surface, while opens induction power supply, in the laser melting coating of workpiece surface
Apply alternating magnetic field on material；
S3. the technological parameter of laser beam and alternating magnetic field is set, starts laser melting coating, while laser melting coating, laser
Laser cladding of material is synchronously delivered at the laser facula of workpiece surface and supplemented by cladding powder feeder, is produced using alternating magnetic field
Electromagnetic force the stomata in laser cladding layer and non-metallic inclusion are removed；
S4. after laser cladding process terminates, laser and induction power supply are turned off at once.
It is further preferred that in step sl, the laser cladding of material is dusty material, filamentary material or sheet material
Material；Its chemical composition is alumina-base material, copper-based material, iron-based material, nickel-base material, cobalt-based material or metal with good conductivity
Between compound substrate material.Suitable laser cladding of material is selected in the laser cladding of material of above-mentioned shape and composition as needed,
It disclosure satisfy that the cladding needs of different type workpiece.
Preferably, in step s3, it is special in the way of Fig. 3 and Fig. 4 when laser melting coating is carried out in alternating magnetic field
Alternating magnetic field is set, the laser cladding of material of workpiece surface forms molten bath, produces induced current in molten bath, charged metal liquid because
Electromagnetic field effect is by electromagnetic force F vertically downwardEMOr F 'EM,
FEM=J0×B0, F 'EM=J '0×B′0,
Wherein, B0Or B '0To carry out magnetic induction intensity during laser melting coating, J in alternating magnetic field0Or J'0For workpiece surface
Induced current is produced in molten bath.
Preferably, in step S3, in laser cladding process, caused bubble is formed after the completion of laser melting coating in molten bath
Stomata, bubble and non-metallic inclusion in molten bath produce and electromagnetic force climbing power F in opposite direction in molten bathP, bubble or
The maximum effusion speed V of non-metallic inclusionmaxWith bubble or the diameter d of non-metallic inclusionp, magnetic induction density B0And alternation magnetic
The frequency f of field is directly proportional；It is inversely proportional with the viscosities il of metal bath, with the depth value residing for bubble or non-metallic inclusion by finger
Number relation is successively decreased.
Specifically, the alternating magnetic field is horizontally through molten bath, and produces downward electromagnetism to the liquid metal in molten bath and push away
Power (Lorentz force)；At the same time, bubble in molten bath and non-metallic inclusion and difference of the metal liquid in terms of conductance are utilized
Different, bubble and non-metallic inclusion in molten bath produce opposite climbing power F because conductance is low in molten bathP, this rising
Power FPThem can be promoted to be separated from molten bath, so as to improve the quality of laser cladding layer.
Preferably, in step s3, in laser melting coating, the technological parameter of the laser beam and alternating magnetic field is：Laser
Power P=300~12000W, scan velocity V=2~3500mm/s, laser spot diameter are D=0.3~25mm；The alternation
Magnetic field intensity B=5~650mT, electric current I=3~330A, frequency f=2~124kHz；Entered during laser melting coating using inert gas
Row protection.More comparative test shows, by the process parameter control of laser beam and alternating magnetic field within the above range, Neng Gouyou
Effect ground carries out laser melting coating, while the magnetic field with sufficient intensity produces Lorentz force, gas and field trash is smoothly discharged.And
Atmosphere protection is carried out using inert gas, can avoid cladding layer that oxidation occurs and produce new field trash, so as to improve device
Dust removal rate.
In general, by the contemplated above technical scheme of the utility model compared with prior art, have following excellent
Point and beneficial effect：
(1) laser cladding apparatus of the present utility model is multiple using alternating magnetic field progress laser-sensing based on particular design
Cladding is closed, is horizontally through molten bath by applying alternating magnetic field, and downward electromagnetic push (Lip river is produced to the liquid metal in molten bath
Lun Zili)；At the same time, using bubble in molten bath and non-metallic inclusion and difference of the metal liquid in terms of conductance, melt
Bubble and non-metallic inclusion in pond produce opposite climbing power F because conductance is low in molten bathP, this climbing power FPCan
To promote them to be separated from molten bath, so as to improve the quality of laser cladding layer.
(2) the utility model device employs the laser Compound Machining head of integral structure, and the laser Compound Machining head will
Electrode, induction coil, work magnetic pole and laser light conducting cylinder etc. integrate, compact-sized；By the magnet of particular design and
For two work magnetic poles by the laser melting coating molten bath of action of alternating magnetic field to workpiece surface, described device is easy to operate, practical,
It can be used for the laser melting coating of metalwork, laser melting, laser alloying or laser fast forming etc..And laser melting coating is sent
Powder device, to matrix surface automatic transport laser cladding of material, is supplemented while cladding by powder-feeding mouth, can make material
Progressively cladding and gas and field trash is set to be easier to discharge from deposited metals.
(3) the utility model selects suitable magnet material, and by the spacing a between the magnetic pole that works and work magnetic pole and work
The spacing h on part surface is controlled in suitable scope, can be on the premise of guarantee laser and powder feeder nozzle pass through, to the greatest extent
Workpiece surface is in sufficiently strong alternating magnetic field, make gas and field trash be easier to discharge.
(4) method of the present utility model by the process parameter control of laser beam and alternating magnetic field within the specific limits, so as to
Laser melting coating is effectively carried out, while produces sufficiently strong magnetic field and Lorentz force, gas and field trash is smoothly discharged.And adopt
Atmosphere protection is carried out with inert gas, can avoid cladding layer that oxidation occurs and produce new field trash, so as to improve removing for device
Miscellaneous efficiency；And suitable laser cladding of material is selected then to disclosure satisfy that the welding needs of different type workpiece as needed；And should
Method is only with several steps, you can completes the cladding and impurity elimination of cladding layer, step is simple to operation, and cost is cheap.
(5) apparatus and method of the present utility model simply easily obtain, and can significantly reduce in aluminium alloy laser cladding layer
Stomata and non-metallic inclusion, the quality of laser cladding layer is significantly improved, there is important application value.
Brief description of the drawings
Fig. 1 is the structural representation of the laser cladding apparatus of the stomata for removing laser cladding layer and field trash of the present utility model
Figure；
The laser Compound Machining head schematic diagram of Fig. 2 laser cladding apparatus of the present utility model；
Fig. 3 is the electromagnetic force direction schematic diagram in molten bath under the utility model forward direction alternating magnetic field；
Fig. 4 is the electromagnetic force direction schematic diagram in molten bath under the reverse alternating magnetic field of the utility model；
Fig. 5 is the cross-section morphology of the laser cladding layer of the present embodiment 1；
Fig. 6 is the cross-section morphology of the laser cladding layer of the present embodiment 2；
Fig. 7 is the cross-section morphology of the laser cladding layer of the present embodiment 3；
Fig. 8 is the cross-section morphology of the laser cladding layer of the present embodiment 4；
Fig. 9 is the cross-section morphology of the laser cladding layer of the present embodiment 5；
Figure 10 is stomata/inclusion rates change curve of aluminium alloy powder-feeding laser melting coating under alternating magnetic field.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not form conflict each other, can is mutually combined.
Fig. 1 is the structural representation of the laser cladding apparatus of the stomata for removing laser cladding layer and field trash of the present utility model
Figure, as illustrated, it includes workbench 9, the laser cladding powder sending device 11 for being arranged on the front of workbench 9 and positioned at workbench 9
The laser Compound Machining head of top,
Wherein, the workpiece 8 is placed on workbench 9, the laser Compound Machining head include electrode 3, induction coil 4,
Laser light conducting cylinder 5, magnet 7, work magnetic pole I 7.1 and work magnetic pole II 7.2, the work magnetic pole I 7.1 and work magnetic pole II 7.2
Described one end of magnet 7 is oppositely arranged on, and has certain interval between each other, the laser light conducting cylinder 5 and workpiece 8 are located at work respectively
Make the surface and underface in gap between magnetic pole I 7.1 and work magnetic pole II 7.2, the work magnetic pole I 7.1 and work magnetic pole
II 7.2 bottom and the surface of workpiece 8 are spaced apart, and induction coil 4, institute are coated with the crossbeam of the other end of magnet 7
State both ends on induction coil 4 and stretch out and be connected with electrode 3, the magnet 7 be work magnetic pole I 7.1 and work magnetic pole II 7.2 it
Between provide action of alternating magnetic field in the surface of workpiece 8,
The laser cladding powder sending device 11 is that laser cladding of material is added on the surface of workpiece 8, and the laser cladding apparatus also wraps
Laser 1 is included, the laser 1 passes through work by light path system and the outgoing laser beam 6 of laser light conducting cylinder 5, the laser beam 6
Gap between magnetic pole I 7.1 and work magnetic pole II 7.2 is radiated at the surface of workpiece 8 and carries out laser melting coating.
In a preferred embodiment of the present utility model, the laser cladding apparatus also include digital control system 10 and with electricity
The connected induction power supply 2 in pole 3, the digital control system 10 control laser 1, laser cladding powder sending device 11, induction power supply 2 and work
Platform 9, the induction power supply 2 control the alternating magnetic field between work magnetic pole I and work magnetic pole II.
In another preferred embodiment of the present utility model, the material of the magnet 7 is silicon steel sheet, ferrite, perm
Alloy or Pure iron, the structure between the work magnetic pole I 7.1 and work magnetic pole II 7.2 and magnet 7 is that same material is formed
Integral structure, or different materials formed isolating construction.
In another preferred embodiment of the present utility model, between the work magnetic pole I 7.1 and work magnetic pole II 7.2
Spacing a scope is 5~30mm；The work magnetic pole I 7.1 and the work bottom surface of magnetic pole II 7.2 and the surface spacing h of workpiece 8 model
Enclose for 0.5~15mm.
In another preferred embodiment of the present utility model, the induction coil 4 is the coil of enamel-covered wire, cable winding
Or the coil of copper pipe coiling, it is electrically insulated between every circle coil of induction coil.
According to another aspect of the present utility model, there is provided a kind of laser for removing laser cladding layer stomata/field trash melts
Coating method, it is characterised in that it uses the laser cladding apparatus of the stomata and field trash as described above for removing laser cladding layer,
Specifically include following steps：
S1. cleaned up after ready workpiece being carried out into mechanical grinding, fixation is stand-by on the table, while will swash
Light cladding material carries out high temperature drying dewater treatment, is put into after cooling stand-by in laser cladding powder sending device；
S2. the laser in laser cladding apparatus is opened, will in workpiece surface, laser cladding powder sending device by laser beam focus
Laser cladding of material is delivered at the laser facula of work-piece surface, while opens induction power supply, in the laser melting coating of workpiece surface
Apply alternating magnetic field on material；
S3. the technological parameter of laser beam and alternating magnetic field is adjusted, starts laser melting coating, while laser melting coating, laser
Laser cladding of material is synchronously delivered at the laser facula of work-piece surface and supplemented by cladding powder feeder, will be swashed using electromagnetic force
Stomata and non-metallic inclusion in light cladding layer remove；
S4. after laser cladding process terminates, laser and induction power supply are turned off at once.
In a preferred embodiment of the present utility model, in step sl, the laser cladding of material be dusty material,
Filamentary material or flaky material；Its chemical composition be alumina-base material, copper-based material, iron-based material, nickel-base material, cobalt-based material or
Intermetallic compound base material with good conductivity.
In another preferred embodiment of the present utility model, in step s3, laser melting coating is carried out in alternating magnetic field
When, the laser cladding of material of workpiece surface forms molten bath, produces induced current in molten bath, charged metal liquid is because of electromagnetic field effect
By electromagnetic force F vertically downwardEMOr F 'EM,
FEM=J0×B0, F 'EM=J '0×B′0,
Wherein, B0Or B '0To carry out magnetic induction intensity during laser melting coating, J in alternating magnetic field0Or J '0For workpiece surface
Induced current is produced in molten bath.
In another preferred embodiment of the present utility model, in step S3, in laser cladding process, produced in molten bath
Bubble form stomata after the completion of laser melting coating, bubble in molten bath and non-metallic inclusion is produced in molten bath and electromagnetic force
Climbing power F in opposite directionP, bubble or the maximum of non-metallic inclusion escape speed VmaxWith bubble or folder nonmetal impurities
Diameter dp, magnetic induction density B0And the frequency f of alternating magnetic field is directly proportional；It is inversely proportional with the viscosities il of metal bath, with bubble or non-
Depth value residing for metallic inclusion successively decreases by exponential relationship.
In another preferred embodiment of the present utility model, in step s3, in laser melting coating, the laser beam and
The technological parameter of alternating magnetic field is：Laser power P=300~12000W, scan velocity V=2~3500mm/s, laser facula are straight
Footpath is D=0.3~25mm；The alternating magnetic field intensity B=5~650mT, electric current I=3~330A, frequency f=2~
124kHz；Protected during laser melting coating using inert gas.
It is given below to lift a specific embodiment preferably to explain the utility model：
Embodiment 1
100mm × 10mm × 10mm aluminum alloy base material surface is subjected to mechanical grinding, and with washes of absolute alcohol aluminum component
Surface, then it is fixed on workbench；The Al alloy powder for having configured composition is subjected to 350 DEG C of insulations 2 in a vacuum furnace
The drying and dehydrating processing of hour, it is stand-by after cooling；After laser beam focus, carried out using synchronous powder feeding system mode at laser melting coating
Reason, while logical argon gas protection.Using optical fiber laser, laser power density 1.5 × 103W/cm2, spot diameter 5mm, scanning speed
Spend 1m/m I n, the spacing a between two work magnetic poles be 20mm, and the spacing h of work magnetic pole bottom surface and workpiece surface is 3mm, magnetic
Induction B=0mT, electric current I=20A, frequency f=50kHz, the magnetic induction intensity in alternating magnetic field are measured using tesla
Amount.
Cladding layer Cross Section Morphology is obtained after laser melting coating as shown in figure 5, its cladding layer stomata/inclusion rates is 7.5%.
Embodiment 2
In addition to magnetic induction density B, other technological parameters of embodiment 2 are same as Example 1, and magnetic induction density B=
11mT, cladding layer Cross Section Morphology is obtained after laser melting coating as shown in fig. 6, its cladding layer stomata/inclusion rates is 5.84%.
Embodiment 3
In addition to magnetic induction density B, other technological parameters of embodiment 3 are same as Example 1, and magnetic induction density B=
24mT, cladding layer Cross Section Morphology is obtained after laser melting coating as shown in fig. 7, its cladding layer stomata/inclusion rates is 4.00%.
Embodiment 4
In addition to magnetic induction density B, other technological parameters of embodiment 4 are same as Example 1, and magnetic induction density B=
35mT, cladding layer Cross Section Morphology is obtained after laser melting coating as shown in figure 8, its cladding layer stomata/inclusion rates is 0.66%.
Embodiment 5
In addition to magnetic induction density B, other technological parameters of embodiment 5 are same as Example 1, and magnetic induction density B=
50mT, cladding layer Cross Section Morphology is obtained after laser melting coating as shown in figure 9, its cladding layer stomata/inclusion rates is 0.33%.
Embodiment 6
100mm × 10mm × 10mm aluminum alloy base material surface is subjected to mechanical grinding, and with washes of absolute alcohol aluminum component
Surface, then it is fixed on workbench；The Al alloy powder for having configured composition is subjected to 350 DEG C of insulations 2 in a vacuum furnace
The drying and dehydrating processing of hour, it is stand-by after cooling；After laser beam focus, carried out using synchronous powder feeding system mode at laser melting coating
Reason, while logical argon gas protection.Using optical fiber laser, laser power density 1.2 × 104W/cm2, spot diameter 25mm, scanning speed
Spend 3500mm/s, the spacing a between two work magnetic poles be 30mm, and work magnetic pole bottom surface and the spacing h of workpiece surface are
15mm, magnetic induction density B=5mT, electric current I=3A, frequency 2kHz, the magnetic induction intensity in alternating magnetic field are measured using tesla
Amount.Cladding layer stomata/the inclusion rates obtained after laser melting coating are 6.5%.
Embodiment 7
100mm × 10mm × 10mm aluminum alloy base material surface is subjected to mechanical grinding, and with washes of absolute alcohol aluminum component
Surface, then it is fixed on workbench；The Al alloy powder for having configured composition is subjected to 350 DEG C of insulations 2 in a vacuum furnace
The drying and dehydrating processing of hour, it is stand-by after cooling；After laser beam focus, carried out using synchronous powder feeding system mode at laser melting coating
Reason, while logical argon gas protection.Using optical fiber laser, laser power density 300W/cm2, spot diameter 0.3mm, sweep speed
2mm/s, the spacing a between two work magnetic poles be 5mm, and the spacing h of work magnetic pole bottom surface and workpiece surface is 0.5mm, magnetic strength
Answer intensity B=650mT, electric current I=330A, frequency 124kHz, the magnetic induction intensity in alternating magnetic field is measured using Tesla meter.
Cladding layer stomata/the inclusion rates obtained after laser melting coating are 0.35%.
Figure 10 is stomata/inclusion rates change curve of the lower aluminium alloy powder-feeding laser melting coating of different magnetic induction intensity effect
Figure.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit the utility model, any modification of all made within spirit of the present utility model and principle, equivalent substitution and change
Enter, should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of laser cladding apparatus for removing stomata/field trash in laser cladding layer, it is characterised in that it includes workbench
(9) laser cladding powder sending device (11) and the laser above the workbench (9), being arranged in front of the workbench (9) are answered
Processing head is closed, wherein：
Workpiece (8) is placed on the workbench (9), the laser Compound Machining head include electrode (3), induction coil (4),
Laser light conducting cylinder (5), magnet (7), work magnetic pole I (7.1) and work magnetic pole II (7.2), wherein the work magnetic pole I (7.1)
The magnet (7) one end is oppositely arranged on the work magnetic pole II (7.2), and has certain interval between each other；The laser
Gap is being just between the work magnetic pole I (7.1) and work magnetic pole II (7.2) respectively for light conducting cylinder (5) and the workpiece (8)
Between the bottom and the workpiece (8) surface of top and underface, the work magnetic pole I (7.1) and the work magnetic pole II (7.2)
At a certain distance；It is coated with the induction coil (4) on the crossbeam of magnet (7) other end, and the induction coil (4)
Both ends are stretched out to be connected with the electrode (3), and laser (1) is additionally provided with front of the electrode (3), and the laser (1) is logical
Light path system and the laser light conducting cylinder (5) outgoing laser beam (6) are crossed, this laser beam (6) passes through the work magnetic pole I (7.1)
Gap between the work magnetic pole II (7.2) is radiated at the workpiece (8) surface and carries out laser melting coating.
2. laser cladding apparatus as claimed in claim 1, it is characterised in that the laser cladding apparatus also includes digital control system
(10) induction power supply (2) and with the electrode (3) being connected, the wherein digital control system (10) control the laser (1), described
Laser cladding powder sending device (11), the induction power supply (2) and the workbench (9), the induction power supply (2) then control the work
Make the alternating magnetic field between magnetic pole I and the work magnetic pole II.
3. laser cladding apparatus as claimed in claim 1 or 2, it is characterised in that the work magnetic pole I (7.1) and the work
Make the integral structure that the structure between magnetic pole II (7.2) and the magnet (7) is same material formation, or different materials shape
Into isolating construction.
4. laser cladding apparatus as claimed in claim 3, it is characterised in that the work magnetic pole I (7.1) and the work magnetic
Spacing a scope is 5mm~30mm between pole II (7.2)；The work magnetic pole I (7.1) and (7.2) bottom of the work magnetic pole II
Face and workpiece (8) surface spacing h scope are 0.5mm~15mm.
5. laser cladding apparatus as claimed in claim 4, it is characterised in that between every circle coil of the induction coil (4)
Electric insulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720447662.2U CN206768218U (en) | 2017-04-26 | 2017-04-26 | Remove the laser cladding apparatus of laser cladding layer stomata/field trash |
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| CN201720447662.2U CN206768218U (en) | 2017-04-26 | 2017-04-26 | Remove the laser cladding apparatus of laser cladding layer stomata/field trash |
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| CN206768218U true CN206768218U (en) | 2017-12-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987838A (en) * | 2017-04-26 | 2017-07-28 | 华中科技大学 | Remove the laser cladding apparatus and method of laser cladding layer stomata/field trash |
| CN108421976A (en) * | 2018-03-01 | 2018-08-21 | 武汉大学 | A kind of pyromagnetic coupled field collaboration selective laser melting device and its heating means |
| RU2689272C1 (en) * | 2018-05-28 | 2019-05-24 | Общество с ограниченной ответственностью "Открытые технологии" | Method of arc welding of wear-resistant layer |
-
2017
- 2017-04-26 CN CN201720447662.2U patent/CN206768218U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106987838A (en) * | 2017-04-26 | 2017-07-28 | 华中科技大学 | Remove the laser cladding apparatus and method of laser cladding layer stomata/field trash |
| CN108421976A (en) * | 2018-03-01 | 2018-08-21 | 武汉大学 | A kind of pyromagnetic coupled field collaboration selective laser melting device and its heating means |
| CN108421976B (en) * | 2018-03-01 | 2019-09-17 | 武汉大学 | A kind of pyromagnetic coupled field collaboration selective laser melting device and its heating means |
| RU2689272C1 (en) * | 2018-05-28 | 2019-05-24 | Общество с ограниченной ответственностью "Открытые технологии" | Method of arc welding of wear-resistant layer |
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