CN205635771U - A octuple is coaxial send whitewashed nozzle for double -deck gradient laser vibration material disk - Google Patents
A octuple is coaxial send whitewashed nozzle for double -deck gradient laser vibration material disk Download PDFInfo
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- CN205635771U CN205635771U CN201620272078.3U CN201620272078U CN205635771U CN 205635771 U CN205635771 U CN 205635771U CN 201620272078 U CN201620272078 U CN 201620272078U CN 205635771 U CN205635771 U CN 205635771U
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Abstract
The utility model provides a double -deck gradient laser vibration material disk octuple is coaxial send whitewashed nozzle, at the laser cladding in -process, adopts that this octuple is coaxial send whitewashed nozzle to send the powder, realizes once scanning double -deck shaping. It is the same basically that the octuple send powder mouthful distribution and the coaxial four ways of sending whitewashed nozzle of traditional four ways to send the powder mouth to distribute, has nevertheless adopted the allocation schema of interior four ways, outer four ways to guarantee that the convergent point top of the interior four ways pulverized powder of this nozzle and the convergent point of outer four ways pulverized powder border on, send the powder in step through inside and outside way, melt the coating at the laser cladding in -process with the bilayer and once scan the shaping, solved traditional adoption four ways and sent whitewashed nozzle to carry out the loaded down with trivial details problem of gradient laser cladding technology, and effectively avoided the layering shaping to lead to melting the problem of defects such as the coating cracks.
Description
Technical field
This utility model belongs to technical field of laser processing, is specifically related to a kind of eight road coaxial powder-feeding nozzles, it is adaptable to double-deck gradient laser gain material manufacturing process.
Background technology
Laser Melting Deposition (Laser Melting Deposition, LMD) it is that a kind of metal developed from laser melting coating (Laser Cladding) technology increases material manufacturing technology process, 3D is printed " lamination adds up " principle and laser melting and coating technique organically combines, with metal dust for processing raw material, by " laser fusion-rapid solidification " process layer by layer deposition, thus form the manufacturing technology of metal parts.Basic step is to utilize the high-energy of laser that metal dust and base material are melted, and forms molten bath on base material, and the powder of fusing, at molten bath disposed thereon, forms cladding layer at substrate surface after cooled and solidified.WC(tungsten carbide is prepared for oil drilling rod surface as disclosed in Chinese patent literature CN102453901B) method of hard alloy wear resistance band, synchronize while high-power laser beam irradiation surface of the work to send into alloy powder for laser melting coating, there is rapid melting and solidification in alloy powder in molten bath, forms wear-resisting erosion resistance cladding layer.LMD high-performance special part in new automobile manufacture, space flight, aviation, new-type weapon and equipment and the manufacture field of the high-grade, precision and advanced part in civilian industry, the especially part at the most unmanageable function-graded material of conventional method, superhard material and inter-metallic compound material quickly manufacture and the Directly rapid fabrication field of large mold has fabulous application prospect.
General LMD technique is commonly used four traditional road coaxial powder-feeding nozzles and is carried out monolayer laser melting coating, processing technique existing defects.As the equipment requirements surface of the oil drilling of petroleum industry have good wearability can, need to carry out twice laser melting coating and form two-layer, ground floor uses Ni based powders, and the second layer uses Ni+WC mixed-powder.Existing LMD technique is limited by tradition four road powder-feeding nozzle used, and powder once can only converge at one, and forming two layers of surface needs successively to carry out respectively the laser melting coating of ground floor and the second layer, and technical process is loaded down with trivial details；When face carries out the laser melting coating of the second layer on the first layer, the cladding layer of ground floor can be produced drawing effect；It addition, have time interval between twice laser melting coating, when carrying out second layer laser melting coating, surface temperature can decline, and clad layer surface is easily generated crackle, affects quality of cladding layer.Therefore, a kind of new powder-feeding nozzle being suitable to double-deck gradient laser melting coating of research and development exploitation is the task of top priority.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, the eight road coaxial powder-feeding nozzles for double-deck gradient laser gain material manufacture method are provided, use this powder-feeding nozzle can in laser melting coating single pass two-layered, formed, simplify gradient laser melting and coating process, and avoid the generation of the defects such as re-melt deposit welding.
In order to solve above-mentioned technical problem, the technical solution of the utility model is:
A kind of eight road coaxial powder-feeding nozzles, including the laser beam passway being distributed on nozzle body and eight powder feeding mouths, the through hole that described laser beam passway and powder feeding mouth are on nozzle body, described powder feeding mouth is uniformly and symmetrically distributed around laser beam passway central shaft, described eight powder feeding mouths are divided into four Ge Nei road powder feeding mouths and four from outside powder feeding mouths, described interior road powder feeding mouth to be less than from outside powder feeding mouth with the distance of laser beam passway central shaft；The extended line in described four Ge Nei road powder feeding opening's edge powder delivery directions converges at powder convergent point one, the extended line in described four from outside powder feeding opening's edge powder delivery directions converges at powder convergent point two, described powder convergent point one is adjacent with powder convergent point two and distance nozzle body is nearer than powder convergent point two, the general eight downward powder feedings of road coaxial powder-feeding nozzle, now powder convergent point one is positioned at above powder convergent point two.
Preferably, described laser beam passway is truncated cone-shaped hole or cylindrical hole.
Technical solutions of the utility model provide the powder-feeding nozzle supporting inside and outside road powder feeding mouth synchronous powder feeding system, make from outside powder convergent point adjacent with interior road powder convergent point, in laser cladding process, single pass is two-layered, formed, solve the problem that tradition gradient laser melting and coating process is loaded down with trivial details, and the problem being prevented effectively from the defects such as layering molding causes that cladding layer cracks.
Accompanying drawing explanation
Fig. 1 a is this utility model eight road coaxial powder-feeding nozzle structural perspective；
Fig. 1 b is this utility model eight road coaxial powder-feeding nozzle structure front view；
Fig. 1 c is this utility model eight road coaxial powder-feeding nozzle structure top view；
Fig. 2 is this utility model eight road coaxial powder-feeding nozzle operation principle schematic diagram.
Wherein: 1: nozzle body；2: laser beam passway；31: interior road powder feeding mouth；32: from outside powder feeding mouth；P1: powder convergent point one；P2: powder convergent point two；4: powder feeding pipe.
Detailed description of the invention
This utility model is described further by embodiment below in conjunction with accompanying drawing, in order to be more fully understood that this utility model.
The present embodiment eight road coaxial powder-feeding nozzle structure is as shown in Fig. 1 a, 1b and 1c, laser beam passway 2 and eight powder feeding mouths of truncated cone-shaped are the through hole outputed on nozzle body 1, when this eight roads coaxial powder-feeding nozzle is assemblied on laser Machining head, laser beam passes through along the central shaft of laser beam passway 2；From Fig. 1 c in terms of the top of nozzle body 1, described eight powder feeding mouths are evenly distributed on two circumference with the central shaft of laser beam passway 2 as the center of circle, wherein four for being distributed in small radii circumference Shang Nei road powder feeding mouth 31, and remaining four is the from outside powder feeding mouth 32 being distributed on relatively large radius circumference；As seen in figure la and lb, all powder feeding mouth equal nozzle body 1 top-to-bottom be completely through, and powder feeding opening's edge powder feeding direction to inclined assemble.
Use the working method of eight road coaxial powder-feeding nozzles of the present embodiment as shown in Figure 2, interior road powder feeding mouth 31 converges at powder convergent point one P1 along the extended line in powder delivery direction, from outside powder feeding mouth 32 converges at powder convergent point two P2 along the extended line in powder delivery direction, powder convergent point one P1 is positioned at above powder convergent point two P2, in the actual course of processing, powder convergent point can be approximately ball, then powder convergent point one P1 lower semisphere is tangent with powder convergent point two P2 episphere or approximates tangent.In the usual course of processing, laser beam is along the central shaft of laser beam passway 2 by eight road coaxial powder-feeding nozzles, and powder convergent point one P1 and powder convergent point two P2 is positioned in laser beam light path.Before starting manufacture process, inserting powder feeding pipe 4 in eight powder feeding mouths, described powder feeding pipe 4 internal diameter can select as required, and external diameter is consistent with powder feeding mouth, is arranged on laser Machining head by eight road coaxial powder-feeding nozzles afterwards；When manufacturing beginning, regulation laser beam passes through laser beam passway 2 irradiation of eight road coaxial powder-feeding nozzles and is treating cladding substrate surface and be scanned according to processing request, synchronize to send into metal dust to laser beam irradiation position by the powder feeding pipe 4 in eight powder feeding mouths simultaneously, the powder that interior road powder feeding mouth 31 and from outside powder feeding mouth 32 are sent into converges in respectively and is positioned at powder convergent point one P1 at laser beam foucing and powder convergent point two P2, powder convergent point one P1 is above powder convergent point two P2 and is adjacent, the powder hardness that interior road powder feeding mouth 31 is sent into is higher, in order to form outer layer cladding layer, the powder hardness that from outside powder feeding mouth 32 is sent into is relatively low, in order to form internal layer cladding layer；Utilize metal dust and base material that the high heat fusing that laser beam produces sends into, molten bath is formed at irradiation position, molten metal powder is at molten bath disposed thereon, form cladding layer after metal dust cooled and solidified at powder convergent point one P1 and powder convergent point two P2 respectively, then can treat that cladding substrate surface concurrently forms double-deck cladding layer through primary laser beam scanning.Four traditional road powder-feeding nozzle only one of which powder convergent points, use monolayer molding mode, and laser melting coating efficiency is low, uses the automatic powder feeding system of above-mentioned eight road powder-feeding nozzles, and a laser scanning can realize double-deck cladding layer molding, substantially increases manufacture efficiency.Double-deck molding simultaneously also avoid the drawing effect of internal layer cladding layer, it is to avoid outer layer cladding layer cracks in the course of processing.
The proprietary material of the oil products such as stone oil drill collar, drilling rod, probing use eight road coaxial powder-feeding nozzles of the present utility model carry out double-deck cladding so that processing effect to be described.Metal dust uses imported from America alloy powder, and internal layer selects Ni base alloy powder, and outer layer selects Ni+WC mixed-powder.First carry out powder drying, then experimental piece surface is processed, with sand papering surface to light；Using the present embodiment eight road coaxial powder-feeding nozzle to carry out the increasing material manufacture of double-deck gradient laser melting coating, experimental piece material selects magnetism-free stainless steel, 718 mould steel and 17-4 rustless steel respectively；Experimental piece material is to use eight traditional road coaxial powder-feeding nozzles to carry out monolayer cladding processing, with as a comparison during magnetism-free stainless steel；After laser cladding equipment is ready to complete, determine the technological parameters such as laser power, scanning speed, powder feeding rate, overlapping rate；After double-deck cladding terminates, use the method for dye penetrant inspection that laser cladding layer is carried out flaw detection process.It was found that the clad layer surface using traditional four road coaxial powder-feeding nozzles to process at magnetism-free stainless steel cracks, and using the cladding layer of the eight road coaxial powder-feeding nozzle processing of the present embodiment, the equal flawless in surface produces.
It should be understood that; above-described embodiment is only for illustrating technology of the present utility model design and feature; its object is to for skilled in the art realises that content of the present utility model and implementing according to this, not detailed description of the invention is exhaustive, can not limit protection domain of the present utility model with this.All modifying according to the technical solution of the utility model or equivalent, without deviating from objective and the scope of technical solutions of the utility model, it all should be contained in the middle of right of the present utility model.
Claims (2)
1. the eight road coaxial powder-feeding nozzles manufactured for double-deck gradient laser gain material, laser beam passway (2) and some powder feeding mouths including the upper distribution of nozzle body (1), described laser beam passway (2) and powder feeding mouth are the through hole on nozzle body (1), described powder feeding mouth is uniformly and symmetrically distributed around laser beam passway (2) central shaft, it is characterised in that:
Described powder feeding mouth quantity is eight, it is divided into four Ge Nei road powder feedings mouth (31) and four from outside powder feeding mouths (32), described interior road powder feeding mouth (31) to be less than from outside powder feeding mouth (32) with the distance of laser beam passway (2) central shaft；Described four Ge Nei road powder feedings mouth (31) converge at powder convergent point one (P1) along the extended line in powder delivery direction, described four from outside powder feeding mouths (32) converge at powder convergent point two (P2) along the extended line in powder delivery direction, and described powder convergent point one (P1) is adjacent with powder convergent point two (P2) and distance nozzle body (1) is nearer than powder convergent point two (P2).
Eight road coaxial powder-feeding nozzles the most according to claim 1, it is characterised in that: described laser beam passway (2) is truncated cone-shaped hole or cylindrical hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272078.3U CN205635771U (en) | 2016-04-05 | 2016-04-05 | A octuple is coaxial send whitewashed nozzle for double -deck gradient laser vibration material disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620272078.3U CN205635771U (en) | 2016-04-05 | 2016-04-05 | A octuple is coaxial send whitewashed nozzle for double -deck gradient laser vibration material disk |
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| CN205635771U true CN205635771U (en) | 2016-10-12 |
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| CN201620272078.3U Withdrawn - After Issue CN205635771U (en) | 2016-04-05 | 2016-04-05 | A octuple is coaxial send whitewashed nozzle for double -deck gradient laser vibration material disk |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734560A (en) * | 2016-04-05 | 2016-07-06 | 南京先进激光技术研究院 | Eight-way coaxial powder feeding nozzle for double-layer gradient laser material increase manufacturing |
-
2016
- 2016-04-05 CN CN201620272078.3U patent/CN205635771U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734560A (en) * | 2016-04-05 | 2016-07-06 | 南京先进激光技术研究院 | Eight-way coaxial powder feeding nozzle for double-layer gradient laser material increase manufacturing |
| CN105734560B (en) * | 2016-04-05 | 2018-04-06 | 南京先进激光技术研究院 | The eight road coaxial powder-feeding nozzles for the manufacture of double-deck gradient laser gain material |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20180406 |
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| AV01 | Patent right actively abandoned |