CN104842068B - A kind of method manufacturing micro convex point in metal surface - Google Patents

A kind of method manufacturing micro convex point in metal surface Download PDF

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Publication number
CN104842068B
CN104842068B CN201510167452.3A CN201510167452A CN104842068B CN 104842068 B CN104842068 B CN 104842068B CN 201510167452 A CN201510167452 A CN 201510167452A CN 104842068 B CN104842068 B CN 104842068B
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convex point
tack coat
micro convex
metal surface
shock wave
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CN104842068A (en
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叶云霞
宣婷
左慧
王峰
何海宾
陶斯思
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Jiangyin Delong Energy Equipment Co.,Ltd.
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Jiangsu University
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Priority to CN201510167452.3A priority Critical patent/CN104842068B/en
Priority to PCT/CN2015/078916 priority patent/WO2016161692A1/en
Priority to GB1717482.2A priority patent/GB2555250B/en
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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
    • B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
    • 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
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • 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
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
    • 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
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/355—Texturing
    • 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
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/356—Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/20—Tools
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof

Abstract

The invention provides a kind of method manufacturing micro convex point in metal surface, belong to Laser Micro-Machining field；Coat tack coat successively in metal surface, tack coat punches, paste absorbed layer and cover transparent restraint layer, irradiated by laser, absorbed layer absorbs laser energy and produces plasma, plasma produces high-amplitude shock wave, high-amplitude shock wave forms penetrating shock wave through described tack coat, shock wave, in described surface of workpiece, forms the micro convex point corresponding with described void shape, size and distribution at described surface of workpiece；The method of the invention is simple, can reliably cash metal surface protrusion angle, the salient point of available arbitrary shape, and be simultaneously achieved and manufacture protruding pattern and metal-surface strengthening in metal surface.

Description

A kind of method manufacturing micro convex point in metal surface
Technical field
The invention belongs to Laser Micro-Machining field, a kind of method manufacturing micro convex point in metal surface.
Background technology
The metal surface with micro convex point pattern industrially has application widely.Such as, height is manufactured at roller surface hard The texturing salient point pattern of degree, not only can improve the service life of roll, and can produce corresponding pit on rolled plate surface Pattern, improves the stamping formabilily of rolled plate, surface map definition and paintability etc.；Corresponding on diel surface Position Design also manufactures texturing salient point pattern, contributes to improving metal material flow uniformity in forming process, improves forming technology Performance and product quality.At present, the method at metal material surface processing micro convex point pattern mainly has: Mechanical Method, chemical etching Art, electric spark texturing etc., said method has a common shortcoming: the distribution of processed micromorphology is random, it is impossible to realize actively setting Meter and control.In recent years, along with the development of laser technology, it is possible to the laser roughening technology realizing active designs and manufacture obtains fast Hail exhibition.Laser roughening know-why, with high-energy-density (104-106W/cm2) pulse laser beam focusing illumination is to metal watch Face, forms some small molten baths, then under the kickback pressure effect that external world's auxiliary gas pressure or own material gasification are formed, Make the fused mass in molten bath by specifying requirement to be stacked into melt tank edge formation arc cam, ultimately form the surface topography of projection.
The technical advantage of laser roughening is: can controllably process micro convex point in metal surface according to tribology Optimum Design Results Pattern.But, in order to ensure to form micro convex point pattern, it is necessary to carefully control the air blowing side of external world's auxiliary gas in process To and pressure, or carefully select effect laser pulse width, in order to obtain suitable gasified reverse stamping press, Protruding pattern can be obtained.Therefore, from being reliably achieved metal surface protrusion angle, traditional laser roughening technique, have certain Process complexity and uncertainty.On the other hand, traditional laser roughening technique, the contour shape of metal surface texturing point by In laser beam, light distribution contour shape determines, typical laser output facula is generally circular in cross section, so, conventional laser texturing work Texturing salient point manufactured by skill is typically only circle, it is impossible to obtain other shapes of texturing salient point, such as square, herringbone, circle Annular etc., therefore, in this sense, traditional laser roughening technique cannot realize tribology optimization thoroughly design and Manufacture.Additionally, reiforcing laser impact technology, can only metal-surface strengthening, it is impossible to manufacture protruding pattern in metal surface；And swash Light texturing technology, can only manufacture protruding pattern, but can not strengthen whole surface in metal surface.
Chinese patent CN201410439453.4 discloses a kind of laser-impact and manufactures the apparatus and method of surface microprotrusion pattern, with Time achieve laser-impact surface modification and laser surface micro-moulding, but the projection of required form, size and distribution cannot be obtained.
In mechanical engineering journal, " experimental study of Investigation of Laser-texterued On Roller With Micro-convex Topography " literary composition discloses by controlling Laser parameter Study of Laser device processing roll surface microprotrusion pattern, but need to control external world's auxiliary gas and realize, have certain Process complexity and uncertainty.
China Mechanical Engineering " the tribological property experimental study on a laser roughening surface " literary composition discloses and tries at multifunction friction wear The tribology contrast experiment testing the laser roughening pattern and Specimens surface that have carried out different size and distribution on machine studies, but On the one hand need during laser roughening to apply auxiliary gas, on the other hand can only obtain single spherical crown shape texturing pattern.
Summary of the invention
For Shortcomings in prior art, the invention provides a kind of method manufacturing micro convex point in metal surface, method is simple, Can reliably cash metal surface protrusion angle, the salient point of available arbitrary shape, and be simultaneously achieved and manufacture projection in metal surface Pattern and metal-surface strengthening.
The present invention realizes above-mentioned technical purpose by techniques below means.
A kind of method manufacturing micro convex point in metal surface, it is characterised in that include
S1, surface of workpiece coat tack coat, described tack coat is processed multiple penetrating hole, at described tack coat On paste absorbed layer, cover transparent restraint layer above described absorbed layer；
S2, hardness according to metal works choose laser beam, and described laser beam passes through transparent restraint layer irradiation absorption layer, institute Stating absorbed layer and absorb laser energy, produce plasma, described plasma produces high-amplitude shock wave, described high-amplitude shock wave warp Crossing described tack coat and form penetrating shock wave, described shock wave is in described surface of workpiece, at described surface of workpiece Form the micro convex point corresponding with described void shape, size and distribution.
In such scheme, described metal works is copper, aluminum or aluminum alloy.
In such scheme, the method for described coating tack coat is spraying, brushes or paste.
In such scheme, described tack coat is high temperature resistant silica gel, pitch-dark, vaseline, paper, double faced adhesive tape, described tack coat Thickness is 20 μm～100 μm.
In such scheme, the method processing hole on described tack coat is laser ablation.
In such scheme, described absorbed layer is aluminium foil, and the thickness of described absorbed layer is 50 μm～200 μm.
In such scheme, described transparent restraint layer is water white water or glass, and the thickness of described transparent restraint layer is 1 Mm～5mm.
In such scheme, the pulse width of described laser beam is 1ns～100ns, and pulse energy is at least 1J, described laser Produce a diameter of 1mm～5mm of hot spot.
Beneficial effects of the present invention:
(1) method manufacturing micro convex point in metal surface of the present invention, it is not necessary to extra applying assists gas, it is not required that Carefully controlling pulse width, principle is directly perceived, and technique is simple；
(2) of the present invention metal surface manufacture micro convex point method, in that context it may be convenient to adhered layer arrange hole shape, Size and distribution, the contour shape of micro convex point pattern, lateral dimension and the distributing position that are manufactured by the method are completely by hole Shape, size and distribution determine, such that it is able to carry out actively setting up hill and dale to the texturing micro convex point array pattern of surface of workpiece Meter and actively setting；
(3) method manufacturing micro convex point in metal surface of the present invention, while metal surface forms micro convex point pattern, Also strengthened at laser-impact effect layer material, and then improved the comprehensive mechanical property of whole metal surface.
Accompanying drawing explanation
Fig. 1 is the process structure schematic diagram manufacturing micro convex point in metal surface of the present invention.
Fig. 2 is the schematic diagram that laser gasification of the present invention ionization produces high-amplitude shock wave.
Fig. 3 is that transmitted wave of the present invention forms schematic diagram.
Fig. 4 is the process schematic that transmitted wave of the present invention acts on metal surface formation micro convex point.
Fig. 5 is the pattern schematic diagram of metal surface of the present invention micro convex point.
Fig. 6 is point-like nick chamber array schematic diagram on tack coat of the present invention.
Fig. 7 is the point-like micro convex point array shape appearance figure that metal surface of the present invention manufactures.
Fig. 8 is V-type nick chamber array schematic diagram on tack coat of the present invention.
Fig. 9 is the V-type micro convex point array shape appearance figure that metal surface of the present invention manufactures.
Figure 10 is intersecting parallels nick chamber array schematic diagram on tack coat of the present invention.
Figure 11 is the intersecting parallels micro convex point array shape appearance figure that metal surface of the present invention manufactures.
Figure 12 is points hardness's distribution curve of the point-like micro convex point array that metal surface manufactures in Fig. 7.
Description of reference numerals is as follows: 1. metal works；2. tack coat；3. hole；4. absorbed layer；The most transparent restraint layer；6. swash Light light beam；7. plasma；8. high-amplitude shock wave；9. penetrating shock wave；10. micro convex point.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is not limited to This.
Such as Fig. 1, coat tack coat 2 on metal works 1 surface, in the multiple penetrating hole 3 of tack coat 2 Surface Machining, will inhale Receive layer 4 to be covered on tack coat 2, on absorbed layer 4, then cover transparent restraint layer 5, obtain the metal work after surface processes Part.
Such as Fig. 2, the metal works after laser beam 6 treatment with irradiation, laser beam 6 is irradiated in absorption through transparent restraint layer 5 Layer 4, absorbed layer 4 absorbs laser energy, and within the extremely short time, gasification ionization forms HTHP plasma 7, plasma 7 restrained layers 5 retrain, and produce high-amplitude shock wave 8.
Such as Fig. 3, owing to having multiple penetrating hole 3 on tack coat 2, i.e. tack coat 2 is made up of with hole 3 binding material, High-amplitude shock wave 8 reaches absorbed layer tack coat cross section, and the penetrating shock wave amplitude at absorbed layer binding material interface approximatesPenetrating shock wave amplitude at interface, absorbed layer hole approximatesWherein P0For laser The crude shock wave amplitude that induction produces, absorbed layer impedance is Z1, binding material impedance is Z2, in hole, air impedance is Z3, Z2>Z3, it can thus be appreciated that P1>P2；Owing to the impedance of binding material is more than the impedance of air in hole 3 so that high-amplitude shock wave 8 After tack coat 2, its amplitude is spatially modulated, and forms penetrating shock wave 9, and the shock wave amplitude being transmitted into hole 3 is remote It is less than the shock wave amplitude being transmitted into binding material 2, shown in amplitude distribution schematic diagram such as Fig. 3 (b) of high-amplitude shock wave 8, Shown in amplitude such as Fig. 3 (c) of the penetrating shock wave 9 of modulation gained.
As shown in Figure 4, the different penetrating shock wave 9 of spatial magnitude is ultimately applied to the surface of metal works 1, big in amplitude Position, surface of workpiece material is gone out pit by impact extruded；In amplitude smaller part position, owing to being affected by overall stress balance, Surface of workpiece material is extruded and flows into gap, hole and form projection.
Being illustrated in figure 5 the micro convex point 10 formed at surface of workpiece, the shape of micro convex point 10, size, pattern are all with empty Cave 3 one_to_one corresponding.
Embodiment 1
Choosing of laser: laser-impact energy source is Nd3+: the laser of the 1064nm of YAG output, its pulse width is 10ns, Energy is 9J, and spot size is 2mm, and in laser output spot, light distribution is flat-top distribution, and laser frequency is 1Hz.
Water is as restraint layer, and aluminium foil is as absorbed layer, pitch-dark as binding material, and metal works is the copper billet that 1cm is thick, copper billet Impedance be 3.6852 × 106g/(cm2S), pitch-dark impedance is 0.315 × 106g/(cm2S), the impedance of aluminium foil is 1.5058 ×106g/(cm2S), the impedance of air is 43.96g/ (cm2S).
Spray 50 μm at the copper block surface that thickness is 1cm pitch-dark, until pitch-dark dry completely time, with laser marking machine at pitch-dark table Shape nick chamber array is got in face ready, as shown in Figure 6, carefully selects the single pulse energy of laser marking machine, to ensure that copper block surface is not Ablated, the diameter in the hole beaten on pitch-dark is about 80 μm, with holes pitch-dark for tack coat, fits one layer on pitch-dark surface The aluminium foil of 100 μm, as absorbed layer, will be covered with aluminium foil and pitch-dark copper billet is positioned in tank, adjusts copper billet and is submerged in the water surface Following height so that the water layer thickness of copper billet specimen surface is about 2mm, this water layer is as restraint layer.
Opening laser instrument, set by above-mentioned parameter, laser pulse acts on metal works through water layer, first laser with Aluminium foil interacts to gasify and produces plasma, and the expansion of plasma, by the effect of contraction of water layer, can produce a shock wave Through aluminium foil absorbed layer and tack coat, when shock wave is through tack coat, due to impedance pitch-dark in tack coat and air impedance not With.Shock wave is spatially modulated；By the pitch-dark interface of aluminium foil, it is transmitted into pitch-dark, and is ultimately applied to rushing of copper block surface Hitting wave amplitude isBy interface, aluminium foil hole, it is transmitted into hole, and finally acts on Shock wave amplitude in copper block surface isWherein P0The crude shock wave amplitude produced for induced with laser Value, the impedance of absorbed layer aluminium foil is ZAluminium foil, the pitch-dark impedance of binding material is ZPitch-dark, in hole, air impedance is ZAir, ZBlack Paint>ZAir, it can thus be appreciated that P1>P2.It is uneven that this allows for being ultimately applied to copper block surface shock wave spatially intensity distribution, VOID POSITIONS shock wave is almost nil, and in pitch-dark position, shock wave is bigger.Therefore, in pitch-dark position, metal material is impacted Extruding forms pit, and in VOID POSITIONS, under overall stress balance effect, material is extruded and flows into hole and form projection, Finally form protruding pattern at copper block surface.The lateral dimension of this projection pattern and lateral contour shape are completely by the hole processed Shape determines, Fig. 7 is the point-like micro convex point array shape appearance figure that copper block surface manufactures.
At the zone line of micro convex point, under laser impact intensified effect, the hardness of material is also obviously improved, i.e. material obtains by force Changing, as shown in hardness profile in Figure 12, before impact, the original hardness of metal material is 58HV, after impact, and salient point top The hardness of end is up to 80HV, and the centre of two salient points is that the hardness of material can closely 90HV.Therefore, by this manufacture method not Only manufacture micro convex point pattern in metal surface, and enhance metal surface.
Embodiment 2
Choosing of laser: laser-impact energy source is Nd3+: the laser of the 1064nm of YAG output, its pulse width is 1ns, Energy is 1J, and spot size is 1mm, and in laser output spot, light distribution is flat-top distribution, and laser frequency is 1Hz.
Water is as restraint layer, and aluminium foil is as absorbed layer, and high temperature resistant silica gel is as binding material, and metal works is the aluminium block that 1cm is thick, The impedance of aluminium block is 1.5058 × 106g/(cm2S), the impedance of high temperature resistant silica gel is 0.1 × 106g/(cm2S), the resistance of aluminium foil Resist is 1.5058 × 106g/(cm2S), the impedance of air is 43.96g/ (cm2S).
Brush the 20 high temperature resistant silica gel of μm on the aluminium block surface that thickness is 1cm, when high temperature resistant silica gel dries completely, beat with laser Marking machine beats V-type nick chamber array on high temperature resistant silica gel, as shown in Figure 8, carefully selects the single pulse energy of laser marking machine, The most ablated to ensure aluminium block surface, the high temperature resistant silica gel of band V-type nick chamber array is tack coat, pastes at high temperature resistant Silica Surface The aluminium foil of unification layer 50 μm is positioned in tank as absorbed layer, the aluminium block that will be covered with aluminium foil and high temperature resistant silica gel, adjusts aluminium Block is submerged in the height of below the water surface so that the water layer thickness of aluminium block specimen surface is about 1mm, and this water layer is as restraint layer.
Opening laser instrument, set by above-mentioned parameter, a laser pulse acts on aluminium block surface, first laser and aluminium through water layer Paper tinsel interacts to gasify and produces plasma, and the expansion of plasma, by the effect of contraction of water layer, can produce a shock wave and wear Cross aluminium foil absorbed layer and tack coat, when shock wave is through tack coat, due to impedance and the air resistance of silica gel high temperature resistant in tack coat Anti-difference.Shock wave is spatially modulated；By aluminium foil high temperature resistant silica gel interface, it is transmitted into high temperature resistant silica gel, and finally makees Shock wave amplitude for aluminium block surface isBy interface, aluminium foil hole, transmission Enter hole, and the shock wave amplitude being ultimately applied to aluminium block surface isWherein P0Lure for laser The crude shock wave amplitude that artificial delivery is raw, the impedance of absorbed layer aluminium foil is ZAluminium foil, the impedance of binding material is high temperature resistant silica gel is ZHigh temperature resistant Silica gel, in hole, air impedance is ZAir, ZHigh temperature resistant silica gel>ZAir, it can thus be appreciated that P1>P2.This allows for being ultimately applied to aluminium block Surface shock wave spatially intensity distribution is uneven, almost nil at VOID POSITIONS shock wave, at high temperature resistant silica gel position shock wave Bigger.Therefore, in high temperature resistant silica gel position, metal material is formed pit by impact extruded, in VOID POSITIONS, is subject in entirety Under dynamic balance effect, material is extruded and flows into hole and form projection, finally forms protruding pattern on aluminium block surface.This projection The lateral dimension of pattern and lateral contour shape are determined by the void shape processed completely, and Fig. 9 is the V-type that aluminium block surface manufactures Micro convex point array shape appearance figure.
At the zone line of micro convex point, under laser impact intensified effect, the hardness of material is also obviously improved, i.e. material obtains by force Changing, the original hardness of metal material is 40HV, and after impact, the hardness on salient point top is up to 48HV, the centre of two salient points Hardness for material can closely 50HV.Therefore, not only manufactured micro convex point pattern in metal surface by this manufacture method, and Enhance metal surface.
Embodiment 3
Choosing of laser: laser-impact energy source is Nd3+: the laser of the 1064nm of YAG output, its pulse width is 100 Ns, energy is, 50J, and spot size is 5mm, and in laser output spot, light distribution is flat-top distribution, laser frequency For 1Hz.
Glass is as restraint layer, and aluminium foil is as absorbed layer, and vaseline is as binding material, and metal works is the block aluminium that 1cm is thick Alloy, the impedance of aluminium alloy is 1.71 × 106g/(cm2S), the impedance of vaseline is 0.3 × 106g/(cm2S), aluminium foil Impedance is 1.5058 × 106g/(cm2S), the impedance of air is 43.96g/ (cm2S).
Brush 100 μm vaseline in the aluminum alloy surface that thickness is 1cm, when vaseline dries completely, use laser marking machine On vaseline, well-digging font nick chamber array, as shown in Figure 10, carefully selects the single pulse energy of laser marking machine, to ensure Aluminum alloy surface is the most ablated, and the vaseline of band intersecting parallels nick chamber array is tack coat, fits one layer 200 on vaseline surface The aluminium foil of μm puts, as absorbed layer, the aluminium alloy that will be covered with aluminium foil and vaseline, the colourless transparent glass placing 5mm, should Colourless transparent glass is as restraint layer.
Opening laser instrument, set by above-mentioned parameter, laser pulse acts on aluminum alloy surface through glass, first laser with Aluminium foil interacts to gasify and produces plasma, and the expansion of plasma, by the effect of contraction of glassy layer, can produce an impact Ripple passes aluminium foil absorbed layer and tack coat, when shock wave is through tack coat, owing in tack coat, impedance and the air of vaseline hinder Anti-difference.Shock wave is spatially modulated；By aluminium foil vaseline interface, it is transmitted into vaseline, and is ultimately applied to aluminium conjunction The shock wave amplitude of gold surface isBy interface, aluminium foil hole, it is transmitted into Hole, and the shock wave amplitude being ultimately applied to aluminum alloy surface isWherein P0For induced with laser The crude shock wave amplitude produced, the impedance of absorbed layer aluminium foil is ZAluminium foil, the impedance of binding material vaseline is ZVaseline, hole Middle air impedance is ZAir, ZVaseline>ZAir, it can thus be appreciated that P1>P2.This allows for being ultimately applied to aluminum alloy surface shock wave Spatially intensity distribution is uneven, and almost nil at VOID POSITIONS shock wave, in vaseline position, shock wave is bigger.Therefore, exist Vaseline position, metal material is formed pit by impact extruded, in VOID POSITIONS, under overall stress balance effect, material It is extruded and flows into hole and form projection, finally form protruding pattern in aluminum alloy surface.The lateral dimension of this projection pattern and Lateral contour shape is determined by the void shape processed completely, and Figure 11 is the intersecting parallels micro convex point array shape that aluminum alloy surface manufactures Looks figure.
At the zone line of micro convex point, under laser impact intensified effect, the hardness of material is also obviously improved, i.e. material obtains by force Change, before impact, the original hardness of metal material is 160HV, after impact, the hardness on salient point top up to 200HV, two The centre of salient point is that the hardness of material can closely 210HV.Therefore, not only micro convex point has been manufactured in metal surface by this manufacture method Pattern, and enhance metal surface.
Described embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, without departing substantially from this In the case of the flesh and blood of invention, any conspicuously improved, replacement or modification that those skilled in the art can make are equal Belong to protection scope of the present invention.

Claims (8)

1. the method manufacturing micro convex point in metal surface, it is characterised in that include
S1, on metal works (1) surface coating tack coat (2), process multiple penetrating holes described tack coat (2) is upper (3), pasting absorbed layer (4) on described tack coat (2), described absorbed layer (4) top covers transparent restraint layer (5)；
S2, hardness according to metal works (1) choose laser beam (6), and described laser beam (6) passes through transparent restraint layer (5) irradiation absorption layer (4), described absorbed layer (4) absorbs laser energy, produces plasma (7), described plasma (7) producing high-amplitude shock wave (8), described high-amplitude shock wave (8) forms penetrating shock wave (9) through described tack coat (2), Described penetrating shock wave (9) acts on described metal works (1) surface, is formed with described on described metal works (1) surface The micro convex point (10) that the shape in hole, size are corresponding with pattern.
2. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described metal works (1) For copper, aluminum or aluminum alloy.
3. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described coating tack coat (2) Method for spraying, brush or paste.
4. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described tack coat (2) For high temperature resistant silica gel, pitch-dark, vaseline, paper, double faced adhesive tape, the thickness of described tack coat (2) is 20 μm～100 μm.
5. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that in described tack coat (2) The method of upper processing hole (3) is laser ablation.
6. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described absorbed layer (4) For aluminium foil, the thickness of described absorbed layer (4) is 50 μm～200 μm.
7. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described transparent restraint layer (5) For water white water or glass, the thickness of described transparent restraint layer (5) is 1mm～5mm.
8. the method manufacturing micro convex point as claimed in claim 1 in metal surface, it is characterised in that described laser beam (6) Pulse width be 1ns～100ns, pulse energy is at least 1J, produce hot spot a diameter of 1mm～5mm.
CN201510167452.3A 2015-04-09 2015-04-09 A kind of method manufacturing micro convex point in metal surface Active CN104842068B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201510167452.3A CN104842068B (en) 2015-04-09 2015-04-09 A kind of method manufacturing micro convex point in metal surface
PCT/CN2015/078916 WO2016161692A1 (en) 2015-04-09 2015-05-14 Method for forming micro-bump on metal surface
GB1717482.2A GB2555250B (en) 2015-04-09 2015-05-14 Method for forming micro-bump on metal surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510167452.3A CN104842068B (en) 2015-04-09 2015-04-09 A kind of method manufacturing micro convex point in metal surface

Publications (2)

Publication Number Publication Date
CN104842068A CN104842068A (en) 2015-08-19
CN104842068B true CN104842068B (en) 2016-08-24

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