CN203049038U - Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels - Google Patents
Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels Download PDFInfo
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- CN203049038U CN203049038U CN 201320005547 CN201320005547U CN203049038U CN 203049038 U CN203049038 U CN 203049038U CN 201320005547 CN201320005547 CN 201320005547 CN 201320005547 U CN201320005547 U CN 201320005547U CN 203049038 U CN203049038 U CN 203049038U
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- gas
- powder
- shower nozzle
- spiral
- passage
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- 239000000843 powder Substances 0.000 title claims abstract description 88
- 238000002844 melting Methods 0.000 title claims abstract description 22
- 230000008018 melting Effects 0.000 title claims abstract description 22
- 239000011248 coating agent Substances 0.000 title claims abstract description 19
- 238000000576 coating method Methods 0.000 title claims abstract description 19
- 230000001681 protective effect Effects 0.000 title abstract 5
- 239000007789 gas Substances 0.000 claims description 122
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 abstract description 16
- 230000005465 channeling Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Laser Beam Processing (AREA)
Abstract
The utility model discloses a nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels. The nozzle is provided with a central channel which is formed at the center of the nozzle and runs through the nozzle up and down, wherein the bottom of the central channel is hopper-shaped, the nozzle is provided with a plurality of gas inlets, one ends of the gas inlets are communicated with the central channel, the other ends of the gas inlets are connected with a first protective gas feeding device, a plurality of powder channels and a plurality of gas channels are formed between the wall of the central channel and the outer wall of the nozzle, the upper ends of the powder channels are connected with a powder feeding device, the lower ends of the powder channels penetrate through the bottom of the nozzle, the upper ends of the gas channels are connected with a second protective gas feeding device, the lower ends of the gas channels penetrate through the bottom of the nozzle, both the powder channels and the gas channels are spiral, the powder channels and the gas channels are distributed at intervals and are uniformly distributed around the central axis of the central channel, and a plurality of gas inlets are located under protective eyeglasses. By adopting the nozzle disclosed by the utility model, a series of cladding results of the tension, melting rate, cladding height and the like of a laser molten pool are improved.
Description
Technical field
the utility model relates to a kind of spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle, belongs to field of laser cladding.
Background technology
laser melting coating is the superlaser surface cladding, its physical process is that, under the irradiation of High energy laser beam, substrate surface is melted rapidly, liquid metal forms a small-scale molten bath, in this molten bath, metallic substance originally mixes mutually with the powder be added, and forms the new liquid-metal layer of one deck, treat laser beam through after, the temperature in molten bath reduces, and liquid metal is cooling rapidly, forms the new solid-state cladding layer of one deck in metallic surface.Laser melting coating can change the metallicity of this key position greatly, as hardness, wear resistance, thermotolerance, erosion resistance etc.
the main powder feeding technology of current industry member in the laser melting coating application is that paraxonic dusts, but belongs to split type shower nozzle because paraxonic dusts, and needs two shower nozzles to cooperate simultaneously, is unfavorable for very much the processing of complex surface, therefore with axiation, dusts and becomes new developing direction.In recent years, on the basis of dusting in same axiation, shielding gas also is added into the design of same axiation, has produced the technology of powderject, shielding gas integrated coaxial.As accompanying drawing 1 has shown, a kind ofly dust, the shower nozzle of shielding gas integrated coaxial.Yet in the world,, because the design of integrated coaxial shower nozzle is not yet perfect, so this technology also has one period very long evolution period.
as the integrated coaxial shower nozzle in accompanying drawing 1, it have the central authorities that are opened in this shower nozzle laser channeling 2, be opened in a plurality of powder channels 3 around laser channeling 2, be opened in the gas passage 4 of powder channel 3 peripheries, laser channeling 2, powder channel 3 and gas passage 4 are all relative independent, are not communicated with mutually.Laser, powder, shielding gas are gathered together and carry out cladding in the work piece surface for the treatment of cladding from channel injection goes out shower nozzle separately.In order to improve the cladding effect, can use duplicate protection gas in cladding process, and existing shower nozzle can't meet and uses two kinds of shielding gas simultaneously.In addition; as shown in Figure 1; powder channel 3 of the prior art and gas passage 4 are straight channel; central shaft around laser channeling 2 is uniformly distributed; due to the restriction that is subject to the shower nozzle size; the angle of inclination of straight channel is limited; therefore cause distant to the shower nozzle bottom of the minimum convergent point of flow of powder and gas stream; the mixed flow of powder field density of powder and shielding gas is little, inhomogeneous; thereby affect the cladding effect, a series of cladding results such as the tension force of laser molten pool, melting ratio, cladding height all are difficult to controlled.
Summary of the invention
in order to address the above problem, the purpose of this utility model is to provide a kind of spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle.
in order to reach above purpose, the technical solution adopted in the utility model is: a kind of spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle, it has the centre gangway that runs through up and down shower nozzle that is opened in these shower nozzle central authorities, the bottom of centre gangway is doline, offer a plurality of ends and the centre gangway gas inlet that the other end is connected with the first shielding gas adding set that is connected on shower nozzle, offer the lower end that is connected with the powder adding set, a plurality of upper ends and run through the powder channel of shower nozzle bottom surface between the outer wall of the wall of centre gangway and shower nozzle, the gas passage powder channel of shower nozzle bottom surface and gas passage are run through all twist in the lower end that is connected with the second shielding gas adding set, a plurality of upper ends, and the two each interval is arranged and be uniformly distributed around the central shaft of centre gangway, a plurality of gas inletes are positioned at the below of protection eyeglass.
further, the entrance that the upper port of powder channel is powder channel, the entrance that the upper port of gas passage is gas passage, the central point of the entrance of a plurality of powder channels is on same level, be made as the first plane, the central point of the entrance of a plurality of gas passages, on same level, is made as the second plane, the first plane can overlap with the second plane, also can not overlap.
further, when the entrance of the entrance of powder channel and gas passage is measure-alike, the diameter of establishing entrance is d
1
, the spacing of the entrance center point of adjacent powder channel and gas passage is more than or equal to 4d
1
; When the entrance size of the entrance of powder channel and gas passage is different, the diameter of establishing wherein larger entrance is d, and the spacing of the entrance center point of adjacent powder channel and gas passage is more than or equal to 4d.
further, the rotation angle displacement of powder channel and gas passage is 170 °～280 °.
further, the size of the ingress of powder channel and gas passage is greater than the size in exit.
further, a plurality of gas inletes are uniformly distributed around the central shaft of centre gangway.
further, the distance of the junction of gas inlet and centre gangway and shower nozzle bottom in the vertical direction is more than or equal to 5cm.
the utility model, for the double shielding gases spiral gas powder passage shower nozzle of laser melting coating, compared with prior art, has the following advantages:
1, set up gas inlet, pass into the first shielding gas from gas inlet, pass into the second shielding gas from gas passage, when having realized two kinds of shielding gas, use, to improve the cladding effect, the shielding gas that passes into centre gangway from gas inlet can first form the stable mobile wind of wind direction in centre gangway, after the ejection shower nozzle, with powder, mixes more abundant simultaneously;
2, traditional linear pattern powder channel is become to the multiple tracks helical channel with the shielding gas channels designs, powder and shielding gas are spouting from the multiple tracks helical channel, make the angle angle between flow of powder and shielding gas stream and laser beam central shaft become large;
3, the whole homogeneity in flow field improves greatly, concentrate more in the powder flow field, density increases, and the minimum convergent point in the powder flow field that pools of the flow of powder shortened and gas stream and the distance of shower nozzle bottom, the density uniformity that makes powder flow field interalloy powder improves more than 30% than previous generation shower nozzle, and then has improved a series of cladding results such as tension force, melting ratio, cladding height of laser molten pool.
The accompanying drawing explanation
the cross-sectional view that accompanying drawing 1 is shower nozzle of the prior art;
accompanying drawing 2 is the cross-sectional view of the utility model for the double shielding gases spiral gas powder passage shower nozzle of laser melting coating.
number in the figure is:
1, shower nozzle; 2, laser channeling; 3, powder channel; 4, gas passage; 5, laser head; 6, laser beam; 7, workpiece base material; 8, cladding layer; 9, protection eyeglass; 10, the first chamber; 11, the second chamber; 12, focusing lens; 13, gas inlet.
Embodiment
below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection domain of the present utility model is made to more explicit defining.
from the structural representation of accompanying drawing 2, can find out, this enforcement example provides a kind of spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle, it has the centre gangway that runs through up and down shower nozzle 1 that is opened in these shower nozzle 1 central authorities, the bottom of centre gangway is doline, offer a plurality of ends and the centre gangway gas inlet 13 that the other end is connected with the first shielding gas adding set that is connected on shower nozzle 1, offer the lower end that is connected with the powder adding set, a plurality of upper ends and run through the powder channel 3 of shower nozzle 1 bottom surface between the outer wall of the wall of centre gangway and shower nozzle 1, gas passage 4 powder channels 3 of shower nozzle 1 bottom surface and gas passage 4 are run through all twist in the lower end that is connected with the second shielding gas adding set, a plurality of upper ends, and the two each interval is arranged and be uniformly distributed around the central shaft of centre gangway, a plurality of gas inletes 13 are positioned at the below of protection eyeglass 9.
from gas inlet, 13 pass into the first shielding gas, from gas passage 4, pass into the second shielding gas.
the entrance of the entrance of powder channel 3 and gas passage 4 is positioned at the below of protection eyeglass 9.The central point of the entrance of a plurality of powder channels 3 is on same level, be made as the first plane, the central point of the entrance of a plurality of gas passages 4 is on same level, be made as the second plane, if shower nozzle 1 diameter is larger, the first plane and the second plane can overlap, in the situation that shower nozzle 1 diameter is less, the first plane and the second plane can not overlap.
when the entrance of the entrance of powder channel 3 and gas passage 4 is measure-alike, the diameter of establishing entrance is d
1
, adjacent powder channel 3 is more than or equal to 4d with the spacing of the entrance center point of gas passage 4
1
; When the entrance size of the entrance of powder channel 3 and gas passage 4 is different, the diameter of establishing wherein larger entrance is d
2
, adjacent powder channel 3 is more than or equal to 4d with the spacing of the entrance center point of gas passage 4
2
.
the rotation angle displacement of powder channel 3 and gas passage 4 is 170 °～280 °; the angular travel size depends on the vertical length of the entrance of passage to the shower nozzle low side; angular travel is crossed conference and is caused powder and shielding gas mobile not smooth in passage; especially powder; may result in blockage, angular travel is too small improves DeGrain to prior art.
the size of the ingress of powder channel 3 and gas passage 4 is greater than the size in exit, the pressure while to increase powder and the second shielding gas, ejecting shower nozzle.
centre gangway comprises the second chamber 11 that is positioned at the first chamber 10 and is positioned at 10 belows, the first chamber and is connected with the first chamber 10, the first chamber 10 of centre gangway and the axial line in the second chamber 11 coincide, the first chamber 10 be cylindrical or doline, and the first 10 bottom, chamber bore is less than or equal to the second 11 top, chamber bore.The second chamber 11 is doline, prevents that powder from entering centre gangway from the second chamber 11 bottom nozzles on the one hand, the spray regime while dwindling on the other hand the shielding gas ejection.
one end of gas inlet 13 is connected with the first shielding gas tamping unit, and the other end is connected with the first chamber 10.The quantity of gas inlet 13 is preferably 3 or 4, and gas inlet 13 is positioned at the below of protection eyeglass 9, to prevent powder pollution protection eyeglass 9.The central shaft of a plurality of gas inletes 13 around the first chamber 10 is uniformly distributed, so that shielding gas forms the stable mobile wind of wind direction in centre gangway.
above-described embodiment is only explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (7)
1. the spiral of the double shielding gases for a laser melting coating gas powder passage shower nozzle, it is characterized in that: it has the centre gangway that runs through up and down shower nozzle (1) that is opened in this shower nozzle (1) central authorities, the bottom of described centre gangway is doline, offer a plurality of ends and the described centre gangway gas inlet (13) that the other end is connected with the first shielding gas adding set that is connected on described shower nozzle (1), offer the lower end that is connected with the powder adding set, a plurality of upper ends and run through the powder channel (3) of shower nozzle (1) bottom surface between the outer wall of the wall of centre gangway and shower nozzle (1), the described powder channel of gas passage (4) (3) of shower nozzle (1) bottom surface and gas passage (4) are run through all twist in the lower end that is connected with the second shielding gas adding set, a plurality of upper ends, and the two each interval is arranged and be uniformly distributed around the central shaft of centre gangway, described a plurality of gas inlet (13) is positioned at the below of protection eyeglass (9).
2. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1; it is characterized in that: the central point of the entrance of described a plurality of powder channels (3) is on same level, and the central point of the entrance of described a plurality of gas passages (4) is on same level.
3. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1 is characterized in that: when the entrance of the entrance of described powder channel (3) and gas passage (4) is measure-alike, the diameter of establishing entrance is d
1, described adjacent powder channel (3) is more than or equal to 4d with the spacing of the entrance center point of gas passage (4)
1; When the entrance size of the entrance of described powder channel (3) and gas passage (4) is different, the diameter of establishing wherein larger entrance is d
2, described adjacent powder channel (3) is more than or equal to 4d with the spacing of the entrance center point of gas passage (4)
2.
4. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1, it is characterized in that: the rotation angle displacement of described powder channel (3) and gas passage (4) is 170 °～280 °.
5. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1, it is characterized in that: the size of the ingress of described powder channel (3) and gas passage (4) is greater than the size in exit.
6. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1, it is characterized in that: described a plurality of gas inletes (13) are uniformly distributed around the central shaft of described centre gangway.
7. the spiral of the double shielding gases for laser melting coating gas powder passage shower nozzle according to claim 1 is characterized in that: the junction of described gas inlet (13) and centre gangway and shower nozzle (1) bottom in the vertical direction apart from being more than or equal to 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005547 CN203049038U (en) | 2013-01-07 | 2013-01-07 | Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320005547 CN203049038U (en) | 2013-01-07 | 2013-01-07 | Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203049038U true CN203049038U (en) | 2013-07-10 |
Family
ID=48732015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320005547 Expired - Lifetime CN203049038U (en) | 2013-01-07 | 2013-01-07 | Nozzle for laser melting coating and using double protective gas, spiral gas channels and spiral powder channels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203049038U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046046A (en) * | 2013-01-07 | 2013-04-17 | 张翀昊 | Double shielding gas spray head with spiral gas and powder channels for laser cladding |
| CN103952696A (en) * | 2014-04-14 | 2014-07-30 | 北京工业大学 | Rapid forming method used for direct preparation of titanium alloy parts in air |
-
2013
- 2013-01-07 CN CN 201320005547 patent/CN203049038U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046046A (en) * | 2013-01-07 | 2013-04-17 | 张翀昊 | Double shielding gas spray head with spiral gas and powder channels for laser cladding |
| CN103952696A (en) * | 2014-04-14 | 2014-07-30 | 北京工业大学 | Rapid forming method used for direct preparation of titanium alloy parts in air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160608 Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: Changzhou Tengen Industry Development Co.,Ltd. Address before: 215636, Suzhou, Jiangsu, Zhangjiagang Daxin Town, 888 Hai Lu Road, Jiangsu Hao Ho Laser Technology Co., Ltd. Patentee before: Zhang Lihao |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee after: CHANGZHOU TIANZHENG INDUSTRIAL DEVELOPMENT CO.,LTD. Address before: Wujin District of Jiangsu city in Changzhou province 213164 Chang Wu Road No. 801, Changzhou science and Technology City Tianhong building A block 8 Building Patentee before: Changzhou Tengen Industry Development Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |