CN206298642U - It is a kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal - Google Patents
It is a kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal Download PDFInfo
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- CN206298642U CN206298642U CN201621212024.4U CN201621212024U CN206298642U CN 206298642 U CN206298642 U CN 206298642U CN 201621212024 U CN201621212024 U CN 201621212024U CN 206298642 U CN206298642 U CN 206298642U
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Abstract
The utility model discloses a kind of laser cladding equipment for being produced based on bifocal and preheating gentle cold light, the equipment includes：Laser, speculum, bifocal, powder feed system, workbench；Wherein, workpiece is positioned on workbench, and positioned at the lower section of bifocal；Laser level exports laser, laser is by after speculum reflection, impinge perpendicularly on bifocal, bifocal produces two focuses, wherein, lens centre region long-focus focus is located at workpiece surface, and short focus focus is located at more than workpiece surface, is irradiated on base material the hot spot formed centered on optical axis.Power density in the middle of so is high for melting substrate surface formation molten bath, and the power density of surrounding is low, is adapted to preheating and post-process treatment.Such layout forms rational preheating, cladding, the operation of heat treatment, increases substantially the utilization rate of laser energy, reduces the thermograde in cladding process, and reduce the residual stress in coating.
Description
Technical field
The utility model is related to laser melting coating processing technique field, and in particular to one kind produces preheating based on bifocal
The laser cladding equipment of gentle cold light.
Background technology
As the outstanding feature and one of the pillar of advanced information society's photoelectron technology of 20th century scientific technological advance, swash
The development of light technology and laser industry is paid much attention to by advanced country in the world.Laser Processing be in domestic and international laser application most
Big project, is also the important means to Transform of Traditional Industrial Equipment, the main cutting realized to various materials, welding, cladding, is beaten
Hole, engraving and heat treatment etc..Wherein laser melting coating processing is the multi-crossed disciplines application technology that grows up nearly ten years, be
Computer technology, material science, laser technology, Numeric Control Technology and detection technique it is full-blown on the basis of, the material of development
Cumulative " remanufacturing " method.
Laser melting coating is individual dynamic fusing and process of setting extremely fast, and cracking breakout is very high at room temperature.To matrix surface
Preheating slow cooling, it is possible to reduce in cladding process produce excessive thermograde so that reduce or Crack prevention generation.Matrix
Preheating slow cooling is actually to reduce cladding layer thermograde from outward appearance to inner essence by pre-heating, namely slow down the cold of coating
But speed, so that the reduction of coating cracking probability.Without the matrix of preheating slow cooling, material is low with the bond strength of matrix, and
The matrix of slow cooling is preheated by surface, good bond strength can occur.In the case of other conditions identical, base material is entered
Row preheating slow cooling treatment, is the effective measures for reducing tearing tendency.
The conventional preheating slow cooling method of current laser cladding process mainly includes that its exterior provides heating and utilizes laser
Heating.The high heat conductivity base laser cladding processing method and system for use in carrying of Application No. ' CN200710159310.8 '；2009
Year Wei Qingsong etc.《Big table top selective laser sintering Quick-forming preheating optimization design》Pre-heating system；Deodar high in 2012 etc.
《The microstructure and its antioxygenic property of high-frequency induction auxiliary laser cladding MCrAlY coatings》All it is to use external heat, obtains
The preferable coating of surface topography, but these methods all have capacity usage ratio relatively low, the deficiency such as complex structure.
One kind of Application No. ' CN201110352257.X ' has preheating and rear hot merit energy and efficient three beam laser
The method of cladding flawless coating；A kind of laser cladding process of Application No. ' CN201410480190.1 ' is using oval equal
The preheating slow cooling method of even light beam, is based on the arrangement mode of the cross direction profiles of working face using focus, and pre- hot-working eases up cold
All the time in a plane, cladding path can only be straight line to laser.But part crack is complex-shaped during reality processing, and length
Very short, trajectory of the laser beam must match with the crack shape moment, and this kind of method haves the shortcomings that practicality is not high.Application number
For the method that a kind of complex parts segmentation laser melting coating with preheating and heat treatment of ' CN201610144326.0 ' is remanufactured
Using laser segmented processing all the way, pre- hot-working being carried out respectively and being eased up cold technique, process is complicated, processing efficiency is not high.
Utility model content
The purpose of this utility model is to solve drawbacks described above of the prior art, there is provided one kind is based on bifocal
Produce the laser cladding equipment of the gentle cold light of preheating.
The purpose of this utility model can be reached by adopting the following technical scheme that：
A kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal, the equipment includes：Laser
1st, speculum 2, bifocal 3, powder feed system 5, workbench 7；
Wherein, workpiece 6 is positioned on the workbench 7, and positioned at the lower section of the bifocal 3；
The horizontal output laser of the laser 1, laser is by after the reflection of the speculum 2, impinging perpendicularly on the bifocal
On point lens 3, the bifocal 3 produces two focuses and two hot spots of same optical axis is formed on the surface of workpiece 6,
It is respectively used to cladding processing and preheating, slow cooling；
The powder feed system 5 adds alloy powder for described device in the molten bath when cladding is processed to the surface of workpiece 6.
Further, the bifocal 3 is made up of the focus lamp of two different curves, the focal length of median curved surface part
More long, the focal length of peripheral curvature portion is shorter.
Further, the bifocal 3 produces 2 focuses and 2 same optical axis of formation on the surface of workpiece
Hot spot, is the first light beam by the laser beam of median curved surface part, and its focus is located at the surface of workpiece 6, by peripheral curved face part
The laser beam for dividing is the second light beam, and its focus is located at the surface of workpiece 6.
Further, first light beam is processed for cladding, and second light beam is used for cladding preheating and slow cooling.
Further, the laser 1 is that gain media is Nd:YAG diode pumped solid state lasers, wavelength is
1064nm, spot diameter is 2mm, and peak power output is 10KW, for providing laser melting coating light source.
Further, the two sides of the bifocal 3 is coated with 1064nm anti-reflection films.
Further, the powder feed system 5 includes lateral feeding head 4, and the powder feed system 5 passes through the lateral feeding head
4 are blown into the molten bath on the surface of workpiece 6 alloy powder.
Further, the speculum 2 is set with the laser of the horizontal output of the laser 1 in 45 degree.
The utility model has the following advantages and effect relative to prior art：
1) it is a kind of disclosed in the utility model to produce the laser cladding equipment of the gentle cold light of preheating to adopt based on bifocal
With bifocal as cladding focus lamp, two diverse locations on optical axis obtain two focuses, are realized with a lens
One laser beam is changed into two beam laser.Add instead of the method that two laser commonly used produce two beam laser, or a laser
The method that upper complicated beam splitting system produces two beam laser, reduces the cost and profile of equipment, reduces the complexity of equipment.
2) it is a kind of disclosed in the utility model to produce the laser cladding equipment of the gentle cold light of preheating to adopt based on bifocal
Workpiece surface is located at lens centre region long-focus focus, short focus focus is located at more than workpiece surface, is irradiated on base material
Form the hot spot centered on optical axis.Power density in the middle of so is high for melting substrate surface formation molten bath, the work(of surrounding
Rate density is low, is adapted to preheating and post-process treatment.Such layout forms rational preheating, cladding, the operation of heat treatment, plus
As long as man-hour waits laser to start to act on workpiece with light spot edge, it is possible to realize that there is the laser of the gentle cold treatment of preheating to melt
Cover.
3) it is a kind of disclosed in the utility model to produce the laser cladding equipment of the gentle cold light of preheating to use based on bifocal
Central area is located in the laser of cladding, and is used to preheat the peripherally located part of device with slow cooling, both constitute one with light
Hot spot centered on axle, is no longer independent light beams of the three in same linear position, with the flexibility that single beam laser is processed,
Can only not be straight line cladding path is required.Before using single beam laser process in, preheating, cladding, be heat-treated three
Processing procedure is processed respectively, is repeatedly come and gone, and the equipment reduces processing link, reduces system complexity, simplifies manufacturing procedure, is improved
Processing efficiency and crudy.
4) it is a kind of disclosed in the utility model to produce the laser cladding equipment of the gentle cold light of preheating to adopt based on bifocal
The method being combined with coating slow cooling is preheated with base material, the utilization rate of laser energy can be increased substantially, reduce cladding process
In thermograde, and reduce coating in residual stress.Reduce the dilution rate of coating, it is ensured that coating is in metallurgical junction with base material
Close, reduce the heat affected area of base material, so as to efficiently obtain the high-performance coating without deformation, flawless.The cladding layer group of acquisition
Knit densification, crystal grain refinement, hence it is evident that improve the service life of workpiece and wear-resisting, corrosion-resistant, cracking resistance and thermal shock resistance.
Brief description of the drawings
Fig. 1 is a kind of laser cladding equipment based on the bifocal gentle cold light of generation preheating disclosed in the utility model
Composition structure chart；
Wherein, 1--- lasers, 2--- speculums, 3--- bifocals, the lateral feeding heads of 4---, 5--- powder feedings system
System, 6--- workpiece, 7--- workbench.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodiment
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
Embodiment
As shown in figure 1, a kind of disclosed in the present embodiment produce the laser melting coating for preheating gentle cold light based on bifocal
Equipment includes：Laser 1, speculum 2, bifocal 3, lateral feeding head 4, powder feed system 5, workpiece 6, workbench 7.
Wherein laser 1 is that gain media is Nd:YAG diode pumped solid state lasers, wavelength is 1064nm, and hot spot is straight
Footpath is 2mm, and peak power output is 10KW, for providing laser melting coating light source.
From the laser of the horizontal output of laser 1, after being reflected in 45 degree of speculums 2 of setting with horizontal laser light light path,
Impinge perpendicularly on bifocal 3.
Bifocal 3 is made up of two different curves, and the focal length of median curved surface part is more long, and its focus is located at workpiece
Surface, peripheral curvature portion focal length is shorter, and its focus is located at the surface of workpiece, thus realizes single incident light
Beam, obtains two different focuses in the propagation direction in different distance.By changing the diameter of median curved surface part, can change
Bifocal distance and then change Energy distribution of the laser energy on workpiece, thus change cladding laser and preheating slow cooling laser it
Between laser power ratio, it is ensured that processing effect.The two sides of bifocal 3 is coated with 1064nm anti-reflection films.
Second light beam of the peripheral curvature portion of short focus is short due to focus, focuses on the surface of workpiece, and with
Beam Propagation, finally forms a hot spot centered on optical axis on working face.Because focus point is not on cladding basal plane, institute
Center section is lower than with the power of unit area, less than substrate surface melting threshold, the first half of hot spot is used to preheat, and produces
Raw about 300 DEG C or so preheating temperature, for improving base material to the absorptivity of the laser beam of cladding and reducing cladding process
In thermograde.
First light beam of the median curved surface part of long-focus focuses on the surface of workpiece, Jiao of laser melting coating when use
Point presses close to substrate surface, forms the cladding laser of high power density, the molten bath of substrate surface formation is acted on, in powder feed system 5
Be blown into alloy powder in molten bath by lateral feeding head 4, and the alloy powder of fusing spreads out in substrate surface, when laser beam motion is removed
Afterwards, cladding layer rapid solidification and crystallization form coating.Sweep speed is 180-800mm/min, cladding thickness 1-2mm, powder feeding rate
30-260g/min。
After laser melting coating is machined, with the movement of laser beam, the second light beam of the peripheral curvature portion of short focus
Latter half is irradiated on coating, and the coating temperature after processing cladding is controlled at 300 DEG C or so.Cladding coating to being formed enters
Row slow cooling is processed, so as to reduce the residual stress in coating, eliminates the crackle in cladding layer.
In sum, it is a kind of disclosed in the utility model that the laser melting coating for preheating gentle cold light is produced based on bifocal
Using bifocal as cladding focus lamp, focusing long, lens periphery part reality are realized in the lens radius central area to equipment
Existing short focusing, forms two focuses in light path.Laser cladding equipment is located at the workpiece surface of workpiece using long-focus focus, short
Focal length focus is located at more than the workpiece surface of workpiece, and so peripheral laser action area is big, and the temperature for acting on matrix generation is low,
It is adapted to the slow cooling treatment after preheating and processing.Intermediate laser machining area is small, and power density is high, and high power density laser is locally molten
Change substrate surface and form molten bath.With single incident light, realize can laser melting coating processing, and can preheat cold treatment of easing up,
Reduce thermograde and thermal stress.And for process laser and for preheating, slow cooling laser be not it is mutually arranged be in line,
But the circle distribution centered on optical axis, the flexibility with single Laser Processing, have again many laser can and meanwhile preheat, it is cladding, slow
Cold advantage, and the laser for preheating or slow cooling function is saved, or be the complexity for obtaining the gentle cold shock light beam of preheating
Beam splitting system, reduces equipment cost and volume, improves process velocity and quality.
Above-described embodiment is the utility model preferably implementation method, but implementation method of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from the change made under Spirit Essence of the present utility model and principle, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (8)
1. it is a kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal, it is characterised in that the equipment bag
Include：Laser (1), speculum (2), bifocal (3), powder feed system (5), workbench (7)；
Wherein, workpiece (6) is positioned on the workbench (7), and positioned at the lower section of the bifocal (3)；
Laser (1) the horizontal output laser, laser is by after the speculum (2) reflection, impinging perpendicularly on the bifocal
On point lens (3), the bifocal (3) produces two focuses and two same optical axis is formed on the surface of workpiece (6)
Hot spot, be respectively used to cladding processing and preheating, slow cooling；
Alloy powder is added in molten bath of the powder feed system (5) for the equipment when cladding is processed to workpiece (6) surface.
2. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 1, its
It is characterised by,
The bifocal (3) is made up of the focus lamp of two different curves, and the focal length of median curved surface part is more long, and periphery is bent
The focal length of face part is shorter.
3. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 2, its
It is characterised by,
The bifocal (3) produces 2 focuses and 2 hot spots of same optical axis is formed on the surface of workpiece, in
Between curvature portion laser beam be the first light beam, its focus be located at workpiece (6) surface, by the laser beam of peripheral curvature portion
It is the second light beam, its focus is located at the surface of workpiece (6).
4. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 3, its
It is characterised by,
First light beam is processed for cladding, and second light beam is used for cladding preheating and slow cooling.
5. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 1, its
It is characterised by,
The laser (1) is Nd for gain media:YAG diode pumped solid state lasers, wavelength is 1064nm, spot diameter
It is 2mm, peak power output is 10KW, for providing laser melting coating light source.
6. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 5, its
It is characterised by,
The two sides of the bifocal (3) is coated with 1064nm anti-reflection films.
7. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 1, its
It is characterised by,
The powder feed system (5) includes lateral feeding head (4), and the powder feed system (5) will be closed by the lateral feeding head (4)
Bronze end is blown into the molten bath on workpiece (6) surface.
8. a kind of laser cladding equipment for producing the gentle cold light of preheating based on bifocal according to claim 1, its
It is characterised by,
The speculum (2) is set with the laser of the laser (1) horizontal output in 45 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621212024.4U CN206298642U (en) | 2016-11-10 | 2016-11-10 | It is a kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621212024.4U CN206298642U (en) | 2016-11-10 | 2016-11-10 | It is a kind of that the laser cladding equipment for preheating gentle cold light is produced based on bifocal |
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| CN206298642U true CN206298642U (en) | 2017-07-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671289A (en) * | 2017-11-01 | 2018-02-09 | 南京航空航天大学 | A kind of process control method of the rare earth modified enhancing aluminium alloy laser 3D printing of low melting loss of elements |
| CN107815685A (en) * | 2017-12-11 | 2018-03-20 | 李俐群 | A kind of bifocus high-rate laser cladding method |
| CN109702326A (en) * | 2019-01-16 | 2019-05-03 | 江苏大学 | A kind of devices and methods therefor improving laser boring depth |
| CN111005022A (en) * | 2019-12-31 | 2020-04-14 | 南京中科煜宸激光技术有限公司 | Method for preparing high-hardness iron-based coating on surface of beryllium bronze copper roller by utilizing three lasers in synergy mode |
| CN112159978A (en) * | 2020-08-27 | 2021-01-01 | 东南大学 | Center powder feeding type cladding head capable of preheating and tempering |
| CN112828304A (en) * | 2020-12-31 | 2021-05-25 | 中国人民解放军军事科学院国防科技创新研究院 | Optical inner coaxial powder feeding double-beam annular laser deposition processing method and processing head |
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2016
- 2016-11-10 CN CN201621212024.4U patent/CN206298642U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671289A (en) * | 2017-11-01 | 2018-02-09 | 南京航空航天大学 | A kind of process control method of the rare earth modified enhancing aluminium alloy laser 3D printing of low melting loss of elements |
| CN107671289B (en) * | 2017-11-01 | 2019-09-10 | 南京航空航天大学 | A kind of process control method of the rare earth modified enhancing aluminium alloy laser 3D printing of low melting loss of elements |
| CN107815685A (en) * | 2017-12-11 | 2018-03-20 | 李俐群 | A kind of bifocus high-rate laser cladding method |
| CN107815685B (en) * | 2017-12-11 | 2018-12-28 | 李俐群 | A kind of bifocus high-rate laser cladding method |
| CN109702326A (en) * | 2019-01-16 | 2019-05-03 | 江苏大学 | A kind of devices and methods therefor improving laser boring depth |
| CN111005022A (en) * | 2019-12-31 | 2020-04-14 | 南京中科煜宸激光技术有限公司 | Method for preparing high-hardness iron-based coating on surface of beryllium bronze copper roller by utilizing three lasers in synergy mode |
| CN111005022B (en) * | 2019-12-31 | 2020-10-20 | 南京中科煜宸激光技术有限公司 | Method for preparing high-hardness iron-based coating on surface of beryllium bronze copper roller by utilizing three lasers in synergy mode |
| CN112159978A (en) * | 2020-08-27 | 2021-01-01 | 东南大学 | Center powder feeding type cladding head capable of preheating and tempering |
| CN112159978B (en) * | 2020-08-27 | 2022-09-02 | 东南大学 | Center powder feeding type cladding head capable of preheating and tempering |
| CN112828304A (en) * | 2020-12-31 | 2021-05-25 | 中国人民解放军军事科学院国防科技创新研究院 | Optical inner coaxial powder feeding double-beam annular laser deposition processing method and processing head |
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