CN106283044B - A kind of laser melting coating head - Google Patents

A kind of laser melting coating head Download PDF

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Publication number
CN106283044B
CN106283044B CN201610993126.2A CN201610993126A CN106283044B CN 106283044 B CN106283044 B CN 106283044B CN 201610993126 A CN201610993126 A CN 201610993126A CN 106283044 B CN106283044 B CN 106283044B
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Prior art keywords
gas
gas circuit
air
bellmouth
chamber
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CN106283044A (en
Inventor
郑雷
张春伟
张晨
戴峰泽
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Dongtai Chengdong Science And Technology Pioneer Park Management Co ltd
Dongtai Tepusong Machinery Equipment Co ltd
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Yangcheng Institute of Technology
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a kind of laser melting coating heads, it is vented gas circuit and compressed air gas circuit is respectively provided with gas flowmeter, by adjusting the exhaust velocity of exhaust system and the pressure of compressed air, make the gas flow that two gas flowmeters are shown equal, can ensure that the air flow condition outside processing head will not be interfered by the lens protection gas circuit that compressed air gas circuit and exhaust gas circuit form, so as to ensure in laser melting coating, what cladding mouth sprayed is influenced by the mixed airflow of protective gas and powder constituent is as few as possible by lens protection gas circuit, improve the quality of laser melting coating；In addition annular retaining ring endoporus is designed for bellmouth, can prevent the disturbance of cladding head lower chamber air-flow, so as to further prevent the mixed airflow of the air-flow of lens protection gas circuit interference protective gas and powder constituent, improves Laser Cladding Quality.

Description

A kind of laser melting coating head
Technical field
The present invention relates to special process field more particularly to a kind of laser melting coating heads.
Background technology
Laser melting coating can obtain one layer of protective layer with particular characteristic in surface of workpiece, increase substantially workpiece Wear-resisting property, corrosion resistance, hydrogen embrittlement can etc., the service life of key components and parts can be increased substantially.Laser melting coating Generally use coaxial powder-feeding mode, the automatic powder feeding system is flexible, can carry out laser melting coating to the parts with complex surface. When laser action of the powder by high power density, plasma, the mixture meeting of plasma and attritive powder can be generated It is moved with high speed to eyeglass direction, leads to the pollution of focus lamp, after the focus lamp after pollution continues through laser action, The ablation of eyeglass can be caused to damage.In general, protection eyeglass can be placed again below focus lamp to prevent the ablation of focus lamp, so And eyeglass is protected equally ablative degradation, Chinese patent " is used for the Coaxial nozzle (application number of laser melting coating 201210293222.8) " propose it is a kind of protect gas circuit to prevent the pollution of protection eyeglass, however, during using this kind of structure, by The protective gas that gas atmosphere inlet sprays can not be well from the other end discharge of protection gas circuit, wherein having greatly It can be sprayed from processing mouth, so as to interfere coaxial powder-feeding air-flow, lead to the unstable of powder feeding and influence cladding effect.
Invention content
The present invention seeks to：A kind of laser melting coating head is provided, with weight feed protective gas and quantitative discharge protection gas The mode of body ensure that protection air-flow will not interfere powder feeding air-flow, ensure that the stability of laser melting coating to the full extent.
The present invention a kind of technical solution be：A kind of laser melting coating head, including exhaust gas circuit, sleeve, focus lamp, protection Mirror, processing head, compressed air gas circuit, gas center, mixed powder gas circuit, signal transmission system and industrial personal computer, the focus lamp, protection Mirror and processing head are sequentially arranged in sleeve from top to bottom, and the processing head center offers perforative centre gangway up and down, institute The side wall for stating processing head offers the air nozzle hole being connected respectively with centre gangway, bellmouth and multiple powder channels, center Channel is equipped with annular retaining ring below bellmouth, and the lower end of processing head is equipped with cladding mouth, is equipped with therewith at the air nozzle hole The gas nozzle of cooperation, above-mentioned compressed air gas circuit are connected between the gas nozzle and above-mentioned gas center, and compressed air gas circuit upper edge Gas center is sequentially installed with the first air valve and first gas flowmeter to the direction of gas nozzle；Above-mentioned mixed powder gas circuit is connected in above-mentioned Between powder channel and above-mentioned gas center, and mixed powder gas circuit is sequentially installed with third along gas center to the direction of powder channel Air valve and meal mixer；Above-mentioned exhaust gas circuit is connected at bellmouth, and is vented gas circuit and is installed successively along bellmouth outwardly direction There are the second air valve, second gas flowmeter and exhaust system, above-mentioned exhaust system, second gas flowmeter, the second air valve, first Gas flowmeter, the first air valve, gas center, meal mixer and third air valve are connected by signal transmission system with industrial personal computer.
Further, the axis of the air nozzle hole is overlapped with the axis of bellmouth, diameter and the taper outer wall of hole of air nozzle hole The diameter in portion is equal, and the diameter of bellmouth inner wall part is 3~5 times of bellmouth outside wall portions diameter.It can ensure that gas nozzle sprays in this way After the compressed air diverging gone out, bellmouth inner wall hole is just flow to, so as to be discharged well by exhaust gas circuit.
Further, the endoporus of the annular retaining ring is the bellmouth of aperture upper big, lower small, can be prevented under cladding head The disturbance of cavity air-flow, so as to further prevent the gaseous mixture of the air-flow of lens protection gas circuit interference protective gas and powder constituent Stream improves Laser Cladding Quality.
Further, the centre gangway include the first chamber and be connected below the first chamber and with the first chamber the Two chambers, first chamber are cylinder, and second chamber is in infundibulate, and the bottom end bore of the first chamber is equal to the top of the second chamber Bore.Between the wall of multiple centrally located channels of powder channel and the outer wall of processing head, and around the central shaft of first cavity It is uniformly distributed, each powder channel is obliquely installed from top to bottom from the outer wall of processing head to the outer wall of centre gangway, and each powder leads to The angle of inclination in road is identical.Effectively prevent in this way powder be washed into centre gangway and caused by it is dangerous, be formed simultaneously Even symmetrical powder flow field.
In use, the center of laser beam face focus lamp, after laser beam transparent focus lamp and protective glass, across processing head The endoporus of centre gangway and its annular baffle ring, and the powder with being ejected from powder channel mixes, and is then passed through the arrival of cladding mouth Treat the workpiece surface of cladding.
It is an advantage of the invention that：
In a manner of 1. the present invention discharges protective gas by weight feed protective gas and quantitatively, ensure to the full extent Protection air-flow will not interfere powder feeding air-flow, ensure that the stability of laser melting coating.
2. the axis of air nozzle hole is overlapped with the axis of bellmouth in the present invention, diameter and the taper outer wall of hole hole of air nozzle hole Diameter is equal, while the diameter of bellmouth inner wall hole is 3~5 times of taper outer wall of hole bore dia, it is ensured that gas nozzle sprayed After compressed air diverging, bellmouth inner wall hole is just flow to, so as to be discharged well by exhaust gas circuit.
3. it is vented gas circuit in the present invention and compressed air gas circuit is respectively provided with gas flowmeter, by the row for adjusting exhaust system The pressure of gas velocity degree and compressed air makes the gas flow that two gas flowmeters are shown equal, it is ensured that by compressed air Gas circuit and the lens protection gas circuit of exhaust gas circuit composition will not interfere the air flow condition outside processing head, so as to ensure to swash During light cladding, cladding mouth sprays as few by lens protection gas circuit as possible by the mixed airflow of protective gas and powder constituent Influence, improve the quality of laser melting coating.
4. the endoporus of annular retaining ring is bellmouth in the present invention, the disturbance of cladding head lower chamber air-flow can be prevented, so as to The air-flow of lens protection gas circuit is further prevented to interfere the mixed airflow of protective gas and powder constituent, improves laser melting coating matter Amount.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is structure diagram in the present invention；
Fig. 2 is the structure diagram of processing head in the present invention；
Fig. 3 is the structure diagram of annular retaining ring in the present invention.
Wherein：1 exhaust system；2 gas flowmeters；3 air valves；4 exhaust gas circuits；5 sleeves；6 laser beams；7 focus lamps；8 protect Goggle；9 processing heads；91 air nozzle holes；92 bellmouths；93 air flues；94 bellmouth outside wall portions；95 bellmouth inner wall parts；96 centers are logical Road；97 first cavitys；98 second cavitys；10 gas nozzles；11 gas flowmeters；12 air valves；13 compressed air gas circuits；In 14 gases The heart；15 annular retaining rings；151 endoporus；16 cladding mouths；17 workpiece；18 meal mixers；19 air valves；20 mixed powder gas circuits；21 signal transmission systems System；22 industrial personal computers.
Specific embodiment
Embodiment：As shown in Figure 1, a kind of laser melting coating head, including exhaust gas circuit 4, sleeve 5, focus lamp 7, protective glass 8, Processing head 9, compressed air gas circuit 13, gas center 14, mixed powder gas circuit 20, signal transmission system 21 and industrial personal computer 22, it is described poly- Burnt mirror 7, protective glass 8 and processing head 9 are sequentially arranged at from top to bottom in sleeve 5, and 9 center of processing head offers to be run through up and down Centre gangway 96, the side wall of the processing head 9 offers the air nozzle hole 91, the bellmouth that are connected respectively with centre gangway 96 92 and multiple powder channels 93, centre gangway 96 is equipped with annular retaining ring 15 in 91 lower section of bellmouth, and the lower end of processing head 9 is installed There is cladding mouth 16, be equipped with matched gas nozzle 10 at the air nozzle hole 91, above-mentioned compressed air gas circuit 13 is connected in the gas nozzle Between 91 and above-mentioned gas center 14, and 13 upper edge gas center of compressed air gas circuit is sequentially installed with first to the direction of gas nozzle Air valve 12 and first gas flowmeter 11；Above-mentioned mixed powder gas circuit 20 be connected in above-mentioned powder channel 3 and above-mentioned gas center 14 it Between, and mixed powder gas circuit 20 is sequentially installed with third air valve 19 and meal mixer 18 along the direction of gas center to powder channel 3；It is above-mentioned Exhaust gas circuit 4 be connected at bellmouth 92, and be vented gas circuit 4 along 92 outwardly direction of bellmouth be sequentially installed with the second air valve 3, Second gas flowmeter 2 and exhaust system 1, above-mentioned exhaust system 1, second gas flowmeter 2, the second air valve 3, first gas stream Gauge 11, the first air valve 12, gas center 14, meal mixer 18 and third air valve 19 pass through signal transmission system 21 and industrial personal computer 22 It is connected.
In the present embodiment, the axis of the air nozzle hole 91 is overlapped with the axis of bellmouth 92, the diameter and cone of air nozzle hole 91 The diameter in shape outer wall of hole portion 94 is equal, and the diameter of bellmouth inner wall part 95 is 3~5 times of 94 diameter of bellmouth outside wall portions.In this way After can ensureing the compressed air diverging that gas nozzle sprays, bellmouth inner wall hole is just flow to, so as to good by exhaust gas circuit Discharge.
In the present embodiment, the endoporus 151 of the annular retaining ring 15 is the bellmouth of aperture upper big, lower small, can prevent from melting A disturbance for lower chamber air-flow is covered, so as to further prevent the air-flow of lens protection gas circuit interference protective gas and powder constituent Mixed airflow improves Laser Cladding Quality.
In the present embodiment, the centre gangway 96 include the first chamber 97 and positioned at the lower section of the first chamber 97 and with 97 phase of the first chamber Second chamber 98 of connection, first chamber 97 are cylinder, and second chamber 98 is in infundibulate, and the bottom end bore of the first chamber 97 Equal to the top bore of the second chamber 98.Between the wall of multiple 93 centrally located channels 96 of powder channel and the outer wall of processing head 9, and Central shaft around first cavity 97 is uniformly distributed, and each powder channel 3 is from top to bottom from the outer wall of processing head 9 to centre gangway 96 outer wall is obliquely installed, and the angle of inclination of each powder channel 3 is identical.Powder is effectively prevented in this way is washed into central lead to Road and caused by it is dangerous, be formed simultaneously powder flow field symmetrically.
The present invention specific implementation process be：Third air valve 19 is opened using industrial personal computer, so as to connect mixed powder gas circuit 20；It beats The second air valve 3 is opened, so as to connect exhaust gas circuit 4；The first air valve 12 is opened, so as to connect compressed air gas circuit 13；Control industry control Machine 22 provides compressed air to compressed air gas circuit 13, while starts exhaust system 1, adjusts supply gas pressure and exhaust system 1 Power is vented, makes the gas flow that 4 and gas flow meter 11 of gas flowmeter is shown equal；Industrial personal computer 22 is controlled to mixed powder gas circuit 23 provide protective gas, and make meal mixer 18 in running order.Opening laser, the center of 6 face focus lamp 7 of laser beam, Laser beam 6 is through after focus lamp 7 and protective glass 8, across the centre gangway of processing head 9 and its endoporus 151 of annular baffle ring 15, And the powder with being ejected from powder channel mixes, and is then passed through cladding mouth 16 and reaches 17 surface of workpiece for treating cladding.
The present invention by compressed air gas circuit 13, exhaust gas circuit 4 and offer the annular retaining ring 15 of bellmouth form it is anti- Lens protection system is sputtered, eyeglass can be protected to the full extent, interference in air flow powder feeding air-flow is prevented, ensure that laser melting coating Stability.In addition, after laser melting coating head using the present invention, the service life of focus lamp and protection eyeglass is significantly carried It is high.
The present invention can be used for coaxial powder-feeding laser melting coating system, can be used for laser 3D printing.The laser beam 6 can Think optical-fiber laser, CO2 laser or YAG laser.
It the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.Except above-mentioned Outside embodiment, the present invention can also have other embodiment.All technical solutions formed using equivalent substitution or equivalent transformation, It falls within scope of the present invention.

Claims (5)

1. a kind of laser melting coating head, it is characterised in that：Including exhaust gas circuit (4), sleeve (5), focus lamp (7), protective glass (8), Processing head (9), compressed air gas circuit (13), gas center (14), mixed powder gas circuit (20), signal transmission system (21) and industrial personal computer (22), the focus lamp (7), protective glass (8) and processing head (9) are sequentially arranged at from top to bottom in sleeve (5), the processing head (9) center offers perforative centre gangway (96) up and down, the side wall of the processing head (9) offer respectively with centre gangway (96) air nozzle hole (91), bellmouth (92) and the multiple powder channels (93) being connected, centre gangway (96) is in bellmouth (91) lower section is equipped with annular retaining ring (15), and the lower end of processing head (9) is equipped with cladding mouth (16), is set at the air nozzle hole (91) Have a matched gas nozzle (10), above-mentioned compressed air gas circuit (13) be connected in the gas nozzle (91) and above-mentioned gas center (14) it Between, and compressed air gas circuit (13) upper edge gas center is sequentially installed with the first air valve (12) and first gas to the direction of gas nozzle Flowmeter (11)；Above-mentioned mixed powder gas circuit (20) is connected between above-mentioned powder channel (3) and above-mentioned gas center (14), and mixed powder The direction of gas circuit (20) along gas center to powder channel (3) is sequentially installed with third air valve (19) and meal mixer (18)；It is above-mentioned Exhaust gas circuit (4) is connected at bellmouth (92), and is vented gas circuit (4) and is sequentially installed with the along bellmouth (92) outwardly direction Two air valves (3), second gas flowmeter (2) and exhaust system (1), above-mentioned exhaust system (1), second gas flowmeter (2), Two air valves (3), first gas flowmeter (11), the first air valve (12), gas center (14), meal mixer (18) and third air valve (19) it is connected by signal transmission system (21) with industrial personal computer (22).
2. a kind of laser melting coating head according to claim 1, it is characterised in that：The axis and taper of the air nozzle hole (91) The axis in hole (92) overlaps, and the diameter of air nozzle hole (91) is equal with the diameter of bellmouth outside wall portions (94), bellmouth inner wall part (95) diameter is 3~5 times of bellmouth outside wall portions (94) diameter.
3. a kind of laser melting coating head according to claim 1, it is characterised in that：The endoporus of the annular retaining ring (15) (151) it is the bellmouth of aperture upper big, lower small.
4. a kind of laser melting coating head according to claims 1 or 2 or 3, it is characterised in that：The centre gangway (96) includes First chamber (97) and below the first chamber (97) and the second chamber (98) for being connected with the first chamber (97), first chamber (97) For cylinder, second chamber (98) is in infundibulate, and the bottom end bore of the first chamber (97) is equal to the top ports of the second chamber (98) Diameter.
5. a kind of laser melting coating head according to claim 4, it is characterised in that：Multiple powder channels (93) are centrally located logical Between the wall in road (96) and the outer wall of processing head (9), and it is uniformly distributed around the central shaft of first chamber (97), each powder channel (3) it is obliquely installed from top to bottom from the outer wall of outer wall to the centre gangway (96) of processing head (9), and each powder channel (3) incline Rake angle is identical.
CN201610993126.2A 2016-11-11 2016-11-11 A kind of laser melting coating head Active CN106283044B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108165987B (en) * 2018-01-08 2021-01-12 沈阳工业大学 Repairing device and repairing method for inner hole of machine tool spindle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1570190A (en) * 2004-04-28 2005-01-26 华中科技大学 Built-in type jet nozzle for laser melting and coating
CN101100747A (en) * 2007-08-03 2008-01-09 北京工业大学 Laser cladding working head adapted for cladding layer capability gradient change
CN201574192U (en) * 2010-01-09 2010-09-08 苏州大学 Light, powder and gas coaxial conveying device for laser cladding formation
CN202297780U (en) * 2011-10-24 2012-07-04 苏州大学 Inside-beam coaxial powder feeding device for laser cladding
CN102828178A (en) * 2012-08-16 2012-12-19 张家港市和昊激光科技有限公司 Coaxial nozzle for laser cladding
CN102828177A (en) * 2012-08-16 2012-12-19 张家港市和昊激光科技有限公司 Integrated coaxial nozzle for laser cladding
CN206359613U (en) * 2016-11-11 2017-07-28 盐城工学院 A kind of laser melting coating head

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1570190A (en) * 2004-04-28 2005-01-26 华中科技大学 Built-in type jet nozzle for laser melting and coating
CN101100747A (en) * 2007-08-03 2008-01-09 北京工业大学 Laser cladding working head adapted for cladding layer capability gradient change
CN201574192U (en) * 2010-01-09 2010-09-08 苏州大学 Light, powder and gas coaxial conveying device for laser cladding formation
CN202297780U (en) * 2011-10-24 2012-07-04 苏州大学 Inside-beam coaxial powder feeding device for laser cladding
CN102828178A (en) * 2012-08-16 2012-12-19 张家港市和昊激光科技有限公司 Coaxial nozzle for laser cladding
CN102828177A (en) * 2012-08-16 2012-12-19 张家港市和昊激光科技有限公司 Integrated coaxial nozzle for laser cladding
CN206359613U (en) * 2016-11-11 2017-07-28 盐城工学院 A kind of laser melting coating head

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