CN103990799A - Selective laser melting rapid forming device - Google Patents

Selective laser melting rapid forming device Download PDF

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Publication number
CN103990799A
CN103990799A CN201410190602.8A CN201410190602A CN103990799A CN 103990799 A CN103990799 A CN 103990799A CN 201410190602 A CN201410190602 A CN 201410190602A CN 103990799 A CN103990799 A CN 103990799A
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laser
station
scanning
powder
moulding cylinder
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CN201410190602.8A
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CN103990799B (en
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曾晓雁
关凯
朱海红
王泽敏
李祥友
胡乾午
蒋明
段军
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华中科技大学
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    • Y02P10/295

Abstract

The invention discloses an efficient multi-station selective laser melting rapid forming device. The device comprises a control system, laser devices, a light guide system and stations, one or more laser devices are arranged, each laser device corresponds to at least two stations, the control system is used for controlling movement of components in the stations and laser output states of the laser devices, each station comprises a laser forming module, a scanning system and an auxiliary device, the scanning systems and the auxiliary devices correspond to the laser forming modules, the laser forming modules are forming cavities in an SLM device, each scanning system is composed of at least one galvanometric scanning system, and the auxiliary devices are used for achieving preheating or/and gas purifying circulation required by SLM forming. Lasers emitted by the laser devices pass through the light guide system and then reach the scanning systems of the corresponding stations respectively, then, laser melting is performed on powder through the corresponding laser forming modules, the stations alternatively perform powder feeding, powder laying, scanning and lifting, uninterrupted work of the laser devices is achieved, efficient utilization of the lasers is achieved, and the manufacturing cost of the formed part is reduced.

Description

A kind of precinct laser fusion rapid molding equipment

Technical field

The invention belongs to and increase material manufacture field, be specifically related to a kind of multi-station high efficient precinct laser fusion rapid molding equipment.

Background technology

The general principle of selective laser melting (SLM) molding technology (Selective laser melting, SLM) is to make 3 d part based on layering manufacture, the mode that is layering.Its technological process is as follows: (1) first carries out hierarchy slicing to the three-dimensional CAD model of part, obtains the profile information of every layer of part; (2) control system is planned technique and scanning pattern; (3) dust feeder powder feeding, power spreading device is laid the powder that one deck and slice thickness are equally thick in moulding cylinder; (4) laser is according to optionally melting powder of control system instruction; (5) height of a bed thickness of moulding cylinder piston decline; (6) repeat (3)~(5), until complete the manufacture of part.SLM technology is directly to have without mould near-net-shape the part of the features such as labyrinth, materials with high melting point or difficult-to-machine material compared with the advantage of classical production process, institute's forming part dimensional accuracy is high and mechanical property is excellent.

About SLM equipment and process, have at present some patents both at home and abroad, can be divided into two kinds according to equipment configuration and process: Yi Zhongshi: cover galvanometer+1,1 laser instrument+1 moulding cylinder, typical example is as United States Patent (USP) " PROCESS AND DEVICE FOR PRODUCING ASHAPED BODY BY SELECTIVE LASERMELTING " (patent No.: US7047098).This SLM equipment only contains a set of galvanometer and a station, decline and give at the piston of moulding cylinder/spread powder during, laser is idle, namely " leaves unused ".This equipment is the major product of current SLM, and each company is only slightly different on powder feeding structure and power spreading device.This type of SLM equipment is limited to field sweep scope and the required precision of galvanometer system, and processing breadth is generally no more than 250mm × 250mm, cannot moulding large-scale part, and the utilization rate of laser and the deposition efficiency of equipment are all lower.

Another kind is: (N is integer to N platform laser instrument+N cover galvanometer+1 moulding cylinder, N>1), as domestic patent documentation " is directly manufactured the precinct laser fusion rapid molding equipment of large parts " (publication number: CN102266942A).The main feature of this class device is to adopt one or several and even tens of laser instruments, every corresponding a set of galvanometer of laser instrument, and all galvanometer system splicings, realize the shaping of large format.This apparatus and method, can prepare large-scale part, also can manufacture the small size part of multiple same material simultaneously.This class equipment, owing to having adopted multi-station laser, therefore deposition efficiency can increase substantially.While making at the same time multiple small size part, also owing to having reduced the clear powder time, thereby deposition efficiency improves more.But such equipment is still single station, decline and send/spread in the powder period at the piston of moulding cylinder, laser is still " leaving unused ", and therefore the utilization rate of laser instrument is still not high, and usefulness does not obtain maximum performance.

Laser instrument is a critical component that price is high in SLM equipment, is the chief component of device fabrication cost.In process of production, the running cost of laser instrument and depreciation cost are all the important component parts of SLM forming part manufacturing cost.For single station, decline or send/spread in the powder time at moulding cylinder inner carrier, laser instrument must be " leaving unused ", causes the waste of resource.If particularly adopt high power laser light, multilayer, repeatedly continuous sweep be shaped after, because powder bed accumulation of heat is large, easily cause bath temperature too high, make part setting rate reduce.For this reason, must cooling a period of time, after being cooled down, molten bath carries out again the scanning of lower a time, and make " leaving unused " time of laser instrument longer.Therefore, the laser instrument that in SLM forming process, moulding cylinder piston declines, send/spread powder time and molten bath to cause cool time time of " leaving unused " is considerable.

Summary of the invention

The invention provides efficient a kind of precinct laser fusion rapid molding equipment, object is to improve the utilization rate of laser instrument and the deposition efficiency of SLM equipment.

A kind of precinct laser fusion rapid molding equipment provided by the invention, is characterized in that, this equipment comprises control system, laser instrument, light-conducting system and station, and laser instrument is one or more, at least two stations of every laser instrument correspondence;

Control system is for controlling the motion of each station inner assembly and the output state of described laser device laser.

Each station all comprises a set of laser formation module and corresponding scanning system and servicing unit thereof.

Laser formation module is the forming cavity in SLM device, and scanning system is made up of at least a set of galvanometer system; Servicing unit is used for realizing the required preheating of SLM moulding or/and gas purification circulation.

The laser being sent by laser instrument arrives respectively the scanning system of each corresponding station after light-conducting system, by corresponding laser formation module, powder is carried out to laser fusion again, each station hocket powder feeding, paving powder, scanning and lifting, realize the non-stop run of laser instrument, to improve the utilization rate of laser.

As the improvement of technique scheme, described laser formation module includes optical window, powder feeding mechanism, power spreading device, moulding cylinder, recovery cylinder, substrate and piston; Optical window is positioned at the top of moulding cylinder, and lifting piston is installed in moulding cylinder, and substrate level is arranged on piston, and powder feeding mechanism is arranged on a side of moulding cylinder top, and power spreading device is positioned at a side of moulding cylinder, and recovery cylinder is positioned at the opposite side of moulding cylinder.Laser beam after scanning system focuses on arrives the powder bed surface of moulding cylinder via optical window, and the upper surface of moulding cylinder casing wall is the benchmark of paving powder, and power spreading device can be in the upper surface motion of moulding cylinder, and taking the upper surface of moulding cylinder as benchmark paving powder.Substrate is the growth substrate of forming part; Before paving powder, first decline under the control system control height of a slice thickness of piston, then powder feeding mechanism powder feeding, power spreading device paving powder, unnecessary powder reclaims by reclaiming cylinder.

The present invention proposes the thinking of a multistation SLM equipment, that is: the SLM lathe of employing multistation, share a lasing light emitter, decline or give at the moulding cylinder piston of a station/while spreading powder, laser is processed processing at other station, thereby the utilization rate of laser instrument is increased substantially, greatly reduce the manufacturing cost of forming part.This multistation is shaped not only can solve " leaving unused " problem of laser instrument in forming process, preparation when can also carrying out the even multiple different materials part of multiple parts, this will improve the deposition efficiency of SLM greatly, reduce the manufacturing cost of forming part, the complicated hardware that is particularly suitable for small lot, many kinds is produced.

Compare with method with existing SLM equipment, the present invention has following characteristics:

(1) 1 of adopting of the present invention or several laser instruments mate multiple stations, and according to service condition, the station number of laser instrument coupling is greater than 1, i.e. a laser instrument coupling multistation;

(2) the corresponding galvanometer of each station can be a set of can be also many covers;

(3) adopt the present invention, can make laser instrument always in use state, decline and send/spread in the powder time at the moulding cylinder of a station, laser instrument no longer " leaves unused ", but scan at other station, therefore the utilization rate of laser improves greatly, can be even full-time;

(4) the present invention can increase interlayer trace interval by increasing station, adopting high power and not reducing under the condition of laser instrument utilization rate and reduce the thermal accumlation in forming part process, avoids the generation of various related defects.

Brief description of the drawings

Fig. 1 is the structural representation sketch of multistation precinct laser fusion rapid molding equipment of the present invention.

Fig. 2 is the structural representation sketch of the combined a kind of concrete mode of laser instrument of the present invention, light-conducting system and galvanometer system.

Fig. 3 is a kind of instantiation of multistation precinct laser fusion rapid molding equipment laser formation module of the present invention.

Fig. 4 is the control flow chart of precinct laser fusion rapid molding equipment of the present invention.

Detailed description of the invention

Existing SLM equipment is all single station, and its production procedure mainly comprises degradation operation under powder feeding, paving powder, laser scanning and moulding cylinder piston, these operations successively repetitive cycling until whole part complete.During this period, laser instrument only uses in laser scanning link, all leaves unused At All Other Times.And difference of the present invention, laser instrument is all the time in scanning mode.For a certain station, still powder feeding of its production procedure, paving powder, laser scanning and moulding cylinder piston under degradation operation repetitive cycling successively until whole part complete.But between several stations, there is certain hour difference in each production procedure.Taking four stations as example, at a time, the powder feeding of A station, B station paving powder, the laser scanning of C station, D station moulding cylinder piston declines.In the next moment, A station paving powder, the laser scanning of B station, C station moulding cylinder piston declines, the powder feeding of D station.So one after the other, until the part of four stations all moulding is complete.Therefore laser will be all the time in use state---scanning.Laser is used in turn by several stations, and therefore the utilization rate of laser instrument is very high, or even full-time.Another advantage of this invention is, when laser beam is in several station mixed sweep, makes the powder bed of each station cooling if having time, can, because of adopting high power laser light scan frequency too not high and overheated, not cause metallurgical imperfection.

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.It should be noted that at this, be used for helping to understand the present invention for the explanation of these embodiments, but do not form limitation of the invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.

The present invention, by the manufacturing procedure of the each station of control system control, makes the light beam timesharing of laser instrument act on different stations, makes laser instrument in running order all the time, until the part of all stations machines.

Equipment building process of the present invention is by the judgement of conventional part material to be processed, size, structure etc. is carried out to choose relevant parameter, and then estimates and design best equipment assembled scheme.

As shown in Figure 1, a kind of detailed description of the invention of precinct laser fusion rapid molding equipment involved in the present invention comprises control system 1, laser instrument 2, light-conducting system 3 and at least two stations 4, and each station comprises a set of laser formation module 5 and corresponding scanning system 6 and servicing unit 7 thereof.Servicing unit 7 is for realizing one or more functions of required such as preheating, gas purification, circulation etc. of SLM moulding.

Control system 1 contains and station 4 some motion control cards one to one, and motion control card receives the motion of each station 4 inner assemblies of signal controlling and the output state of each laser device laser.Laser instrument 2 can be one or many, can be identical or different kind and model.

As shown in Figure 2, scanning system 6 is made up of galvanometer system 8, a set of scanning system 6 can be made up of a set of galvanometer system, also can be that number cover galvanometer system is assemblied to form, the laser that laser instrument 2 sends arrives the laser entrance of each galvanometer in scanning system 6 after light-conducting system 3, and control system 1 is controlled every bundle Laser Time Sharing and entered on different station corresponding with it galvanometer system 8.

Light-conducting system 3 can be optical fiber group, the reflection light-conducting system that also can be formed by optical mirror slip, or even both combinations, or any one can import laser the optical texture of station.

Whole equipment must comprise at least two stations 4, and each station is the part after removal laser instrument and the light-conducting system of conventional SLM equipment, and each station comprises laser formation module 5 and scanning system 6, and laser formation module 5 is corresponding one by one with scanning system 6.

As shown in Figure 3, laser formation module 5 is the forming cavity in conventional SLM device, generally includes optical window 9, powder feeding mechanism 10, power spreading device 11, moulding cylinder 12, reclaims cylinder 13, substrate 14 and piston 15.If contain preheating device in servicing unit 7, preheating device is arranged on the bottom of moulding cylinder 12 or around.

The laser that laser instrument 2 sends arrives scanning system 6 after light-conducting system 3; after scanning system 6 focuses on, warp is arrived the powder bed surface of the moulding cylinder that is confined to die cavity 12 with atmosphere protection function by optical window 9; the upper surface of moulding cylinder 12 casing walls is the benchmark of paving powder; power spreading device 11 can be in the upper surface motion of moulding cylinder, and taking the upper surface of moulding cylinder 12 as benchmark paving powder.In moulding cylinder 12, have a piston that can accurately move up and down 15, substrate 14 levels are arranged on piston 15, and substrate 14 is growth substrate of forming part.Before paving powder, first decline under the control system control height of a slice thickness of piston 15, then powder feeding mechanism 10 powder feedings, power spreading device 11 spreads powder.In this process, unnecessary powder reclaims by reclaiming cylinder 13.Should be noted that, above-mentioned laser formation module 5 can be the structure of any one forming cavity in existing SLM equipment.

The structure of the quantity of laser instrument 2, station 4 of should making rational planning for before precinct laser fusion rapid molding involved in the present invention is equipped in and establishes and light-conducting system 3, laser formation module 5, scanning system 6.Taking into full account under the size and efficiency of conventional forming part, reducing as far as possible the quantity of laser instrument 2; And under and the prerequisite of production efficiency that requires the highest in laser utilization rate, reducing as far as possible the quantity of station 4 or galvanometer system 8, optimum organization module, avoids occurring that various device quantity is not mated and too idle situation appears in some device.In precinct laser fusion rapid molding involved in the present invention equipment the structure of the quantity of station, laser formation module and with the selection of the integrated mode of laser instrument can be according to following steps:

(1) material, size and the structure of clearly conventional part to be processed, in technological parameter storehouse, select rational machined parameters according to material category, select the size of the molding cavity of laser formation module according to accessory size, according to the volume ratio of design of part estimation part and molding space.

(2) calculate the ratio A of non-laser scanning time and laser scanning time.Being set as die cavity is that the length of side is the square of a, and adopting unidirectional paving powder and paving powder speed is V, the forming cavity length of side that paving powder stroke is twice; Laser scanning speed is υ, and distance between centers of tracks is d, and the volume ratio of part and molding space is η, and the processing breadth that single scanning system limits is S.Paving powder time T pFwith laser scanning time T sMavailable formula (1), (2) estimation respectively.

T PF = 4 a V - - - ( 1 )

T SM = S · η υ · d - - - ( 2 )

If piston fall time be t 1, the powder feeding time is t 2, the non-laser scanning time can be estimated by formula (3) with the ratio A of laser scanning time.

A = T PF + t 1 + t 2 T SM - - - ( 3 )

For ensureing the making full use of of laser instrument, all stations should exceed the paving powder time of twice laser scanning total time, therefore the quantity of station should be [2A+1].There is the next volume ratio η that need to suitably improve according to the structure of part part and molding space of situation of multiple galvanometer systems at single station, to reduce the laser scanning time estimation error causing because of the high volume ratio of regional area.Do not equip and also can estimate according to corresponding computation schema for foursquare precinct laser fusion rapid molding for processing breadth.In process, cause amount of localized heat to concentrate for fear of laser and produce as the manufacturing deficiency such as pore, distortion, and the heat accumulation producing causes stress to concentrate reduction rapid solidification effect and reduces mechanical property, also can suitably increase the quantity of station, increase the time interval of adjacent layer laser scanning.

(3) the individual station of reasonable Arrangement [2A+1], makes it not interfere with each other in operation, process.

(4) laser that all laser instruments send is along light-conducting system timesharing input [2A+1] individual station.This can adopt the method for laser instrument band multi-channel optical fibre, also can adopt hard light path or spectroscopical method to realize.If the scanning system layout of each station is identical, should avoid the galvanometer system of same laser instrument correspondence in different station in similar position as far as possible, can in the small lot batch manufacture of part, increase like this utilization rate of laser instrument by making rational planning for of control system.

In the process of precinct laser fusion rapid molding equipment, the optimization of the optimization of each station process sequence and each laser instrument leaded light output order is in the present invention, to improve one of important method of laser instrument effective rate of utilization.In each station forming process, mainly comprise powder feeding, paving powder, laser scanning and four operations of piston decline, and laser device laser leaded light order mainly refers to that each laser arrives the sequencing of each galvanometer system.In precinct laser fusion rapid molding equipment, each operation and laser leaded light order are by control system 1 unified planning, for avoiding occurring that operation confusion must abide by the principle:

(1) in the station under powder feeding, paving powder, piston decline operation, can not carry out laser scanning operation.

(2) station that first completes paving powder operation has the priority of carrying out laser scanning operation.

(3) the laser scanning operation of all galvanometer systems of a certain station can be carried out the next operation of this station after finishing.

(4) a certain station galvanometer system completes after laser scanning operation, and its corresponding laser instrument switches to the light-conducting system in other station, carries out laser scanning operation, without waiting for all scanning system end-of-jobs of current station.

(5) the laser scanning operation of each station can be carried out simultaneously, but has at least the laser scanning operation of a station to stagger the time, to ensure the high usage of laser.

The control flow of control system as shown in Figure 4.Be mainly:

Laser instrument numbering is represented with L, and station is numbered and is represented with N, and N station uses the galvanometer system of L platform laser instrument Output of laser to be expressed as (N, L).

Send, spread after powder operation when N station completes, the all galvanometer systems of this station send request signal to control system, galvanometer system (N, 1), (N, 2) ... (N, L) ... wait control system response, in equipment, the request signal of all galvanometer systems distributes according to request time and is arranged in affiliated laser instrument separately and treats in response stack.

Control system is treated putting in order of request signal in response stack according to L platform laser instrument, adopts the selection strategy of first in first out to make response to the request signal of each station galvanometer system, and controls the galvanometer system that sends this request signal and complete laser scanning operation.L platform laser instrument sends request signal after completing current task, and control system is distributed to it by the laser scanning operation of the next request signal in storehouse.

Galvanometer system (N, L) send request signal to control system immediately after executing laser scanning operation, request signal is assigned in the paving powder signal set of the each station of N, collect after the request signal of all galvanometer systems on N station when this set, this station of control system control send, spreads powder operation and completes.

If the paving powder signal set of all stations is not all collected and complete and currently carried out without paving powder operation, control system is adjusted stacking order, preferentially spreads station that in powder signal set, signal is maximum and remain the laser scanning operation of waiting galvanometer system.

Control system constantly receives request signal and is delivered to each laser instrument and treats response stack and each station paving powder signal set, and according to the feedback signal of laser instrument and station, each executing agency is sent to instruction and complete laser scanning operation and send, spread powder operation.

The present invention is not only confined to above-mentioned detailed description of the invention; persons skilled in the art are according to content disclosed by the invention; can adopt other multiple detailed description of the invention to implement the present invention; therefore; every employing project organization of the present invention and thinking; do some simple designs that change or change, all fall into the scope of protection of the invention.

Claims (4)

1. a precinct laser fusion rapid molding equipment, is characterized in that, this equipment comprises control system, laser instrument, light-conducting system and station, and laser instrument is one or more, at least two stations of every laser instrument correspondence;
Control system is for controlling the motion of each station inner assembly and the output state of described laser device laser;
Each station all comprises a set of laser formation module and corresponding scanning system and servicing unit thereof;
Laser formation module is the forming cavity in SLM device, and scanning system is made up of at least a set of galvanometer system; Servicing unit is used for realizing the required preheating of SLM moulding or/and gas purification circulation;
The laser being sent by laser instrument arrives respectively the scanning system of each corresponding station after light-conducting system, by corresponding laser formation module, powder is carried out to laser fusion again, each station hocket powder feeding, paving powder, scanning and lifting, realize the non-stop run of laser instrument, to improve the utilization rate of laser.
2. precinct laser fusion rapid molding equipment according to claim 1, is characterized in that, described laser formation module includes optical window, powder feeding mechanism, power spreading device, moulding cylinder, recovery cylinder, substrate and piston;
Optical window is positioned at the top of moulding cylinder, and lifting piston is installed in moulding cylinder, and substrate level is arranged on piston, and powder feeding mechanism is arranged on a side of moulding cylinder top, and power spreading device is positioned at a side of moulding cylinder, and recovery cylinder is positioned at the opposite side of moulding cylinder;
Laser beam after scanning system focuses on arrives the powder bed surface of moulding cylinder via optical window, and the upper surface of moulding cylinder casing wall is the benchmark of paving powder, and power spreading device can be in the upper surface motion of moulding cylinder, and taking the upper surface of moulding cylinder as benchmark paving powder; Substrate is the growth substrate of forming part; Before paving powder, first decline under the control system control height of a slice thickness of piston, then powder feeding mechanism powder feeding, power spreading device paving powder, unnecessary powder reclaims by reclaiming cylinder.
3. precinct laser fusion rapid molding according to claim 1 and 2 equipment, is characterized in that, the quantity of described station is 2A+1, and wherein, A is the non-laser scanning time and the ratio of laser scanning time,
A = T PF + t 1 + t 2 T SM
T 1for piston is fall time, t 2for the powder feeding time of single station; T pFfor the paving powder time of single station, T sMfor the laser scanning time of single station.
4. precinct laser fusion rapid molding equipment according to claim 1 and 2, is characterized in that, the forming process of each station mainly comprises powder feeding, paving powder, laser scanning and four operations of piston decline, and each operation is carried out according to following rule:
One: can not carry out laser scanning operation in the station under powder feeding, paving powder, piston decline operation;
Its two: the station that first completes paving powder operation has the priority of carrying out laser scanning operation;
Its three: the next operation that can carry out this station after the laser scanning operation of all galvanometer systems of a certain station finishes;
Its four: a galvanometer system of a certain station completes after laser scanning operation, and its corresponding laser instrument switches to the light-conducting system in other station, carries out laser scanning operation, without waiting for current station all scanning system end-of-jobs;
Its five: the laser scanning operation of each station can be carried out simultaneously, but have at least the laser scanning operation of a station to stagger the time, to ensure the high usage of laser.
CN201410190602.8A 2014-05-07 2014-05-07 A kind of precinct laser fusion rapid molding equipment CN103990799B (en)

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Cited By (9)

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CN104668563A (en) * 2015-02-13 2015-06-03 华中科技大学 High-energy beam additive manufacturing method and equipment with high powder raw material utilization rate
CN104827664A (en) * 2015-01-28 2015-08-12 江汉大学 3D printer
CN104923786A (en) * 2015-06-11 2015-09-23 广东奥基德信机电有限公司 Dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system
CN105537590A (en) * 2016-02-01 2016-05-04 合肥中加激光技术有限公司 Method for reducing hot stack influences of metal SLM three-dimensional printing
CN105665701A (en) * 2015-06-03 2016-06-15 哈尔滨福沃德多维智能装备有限公司 Method for conducting melting forming through laser powder scanning
CN106346006A (en) * 2016-10-26 2017-01-25 华中科技大学 Laser additive manufacturing equipment and method of metal part
CN106944715A (en) * 2017-04-17 2017-07-14 北京航星机器制造有限公司 A kind of method of highly efficient multi-position electric arc increasing material manufacturing aluminum alloy junction component
CN107971488A (en) * 2016-10-24 2018-05-01 湖南尚亿达科技有限责任公司 A kind of laser 3D printing device
CN110523987A (en) * 2019-09-27 2019-12-03 华中科技大学 A kind of laser sintered synchronous compacting increasing material manufacturing system for dense material preparation

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CN102717185A (en) * 2012-04-23 2012-10-10 吴周令 Full-automatic semiconductor wafer laser processing device and processing method thereof
CN103658647A (en) * 2013-12-10 2014-03-26 华南理工大学 SLM device based on four lasers and two stations and machining method
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US20020152002A1 (en) * 2001-02-21 2002-10-17 Markus Lindemann Process and device for producing a shaped body by selective laser melting
CN102266942A (en) * 2011-07-15 2011-12-07 华中科技大学 Selective laser melting rapid forming device for directly manufacturing large-size parts
CN102717185A (en) * 2012-04-23 2012-10-10 吴周令 Full-automatic semiconductor wafer laser processing device and processing method thereof
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827664A (en) * 2015-01-28 2015-08-12 江汉大学 3D printer
CN104827664B (en) * 2015-01-28 2017-07-21 江汉大学 A kind of 3D printer
CN104668563A (en) * 2015-02-13 2015-06-03 华中科技大学 High-energy beam additive manufacturing method and equipment with high powder raw material utilization rate
CN105665701A (en) * 2015-06-03 2016-06-15 哈尔滨福沃德多维智能装备有限公司 Method for conducting melting forming through laser powder scanning
CN104923786B (en) * 2015-06-11 2017-01-11 广东奥基德信机电有限公司 Dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system
CN104923786A (en) * 2015-06-11 2015-09-23 广东奥基德信机电有限公司 Dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system
CN105537590A (en) * 2016-02-01 2016-05-04 合肥中加激光技术有限公司 Method for reducing hot stack influences of metal SLM three-dimensional printing
CN107971488A (en) * 2016-10-24 2018-05-01 湖南尚亿达科技有限责任公司 A kind of laser 3D printing device
CN106346006A (en) * 2016-10-26 2017-01-25 华中科技大学 Laser additive manufacturing equipment and method of metal part
CN106944715A (en) * 2017-04-17 2017-07-14 北京航星机器制造有限公司 A kind of method of highly efficient multi-position electric arc increasing material manufacturing aluminum alloy junction component
CN110523987A (en) * 2019-09-27 2019-12-03 华中科技大学 A kind of laser sintered synchronous compacting increasing material manufacturing system for dense material preparation

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