CN103949638A - Light-split single-light source double-scanning electron microscope type selective laser melting molding device - Google Patents
Light-split single-light source double-scanning electron microscope type selective laser melting molding device Download PDFInfo
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- CN103949638A CN103949638A CN201410194084.7A CN201410194084A CN103949638A CN 103949638 A CN103949638 A CN 103949638A CN 201410194084 A CN201410194084 A CN 201410194084A CN 103949638 A CN103949638 A CN 103949638A
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Abstract
The invention belongs to the technical field of quick molding, and relates to a light-split single-light source double-scanning electron microscope type selective laser melting molding device. An inert gas curtain is arranged on the upper side surface of a molding cavity; a first scanning array mirror and a second scanning array mirror are arranged above the molding cavity and are correspondingly connected with a first laser beam expander and a second laser beam expander; a working platform is arranged below the first laser beam expander and the second laser beam expander; a stepping motor is arranged on the working platform; a heating system and a screw rod are fixed on the stepping motor; a powder loading device and a waste powder collecting device are respectively arranged on two sides of the working platform; a powder scraping plate is arranged on the powder loading device; one end of a laser light source is electrically connected with a numerical control system, and the other end of the laser light source is electrically connected with a light splitter; the molding cavity is connected with an oxygen content sensor through electrical information. The light-split single-light source double-scanning electron microscope type selective laser melting molding device is simple in structure, reliable in principle, flexible to use, convenient to operate, high in molding efficiency, scanning speed and positioning accuracy, and low in cost.
Description
Technical field:
The invention belongs to rapid shaping technique field, relate to a kind of selective laser melting former, particularly the two ESEM selective laser melting shaped devices of a kind of light splitting single light source.
Background technology:
Selective laser melting (SLM) is a kind of method of metalwork straight forming, it is the latest development of rapid shaping technique, the basic thought of this technology based on rapid shaping, " increment " manufacture of i.e. successively cladding, there is the part of geometry in particular according to three-dimensional CAD model straight forming, in forming process, technology powder melts completely, produces metallurgical binding.Adopt the metal parts of the shape and structure complexity that traditional mechanical processing tools cannot directly manufacture, it is one of main direction of rapid laser-shaping technique application, rapid laser-shaping technique has the following advantages: the one, can directly manufacture high-quality metal product, need not any aftertreatment technology or simple surface treatment, select directly to process the part that can directly use by simple CAD moulding and material, greatly shorten product development cycle; The 2nd, can obtain having the entity of nonequilibrium state supersaturated solid solution and even tiny metallographic structure, density almost can reach 100%, and part machinery performance is suitable with Forging Technology gained; The 3rd, use and there is the laser instrument of high power density, with the very little laser beam processing metal of hot spot, the metal parts that makes to process has good surface roughness of very high dimensional accuracy; The 4th, because laser spot diameter is very little, therefore can melt dystectic metal with lower power, making becomes possibility with the old finished parts of metal dust of single component, and the metal dust kind that can Gong select is widened greatly; The 5th, be applicable to the workpiece of various complicated shapes, being especially applicable to inside has complicated different in nature structure, as hollow, three-dimensional grid and the complex part that cannot manufacture by conventional method.But the SLM equipment of selling on market now, due to the frame for movement of single gust of mirror, the restriction of optical texture, makes its compact dimensions be difficult to become large, and shaping efficiency is low, and range of application is extremely restricted, and processing cost is high.
Summary of the invention:
The object of the invention is to overcome the shortcoming that prior art exists, seeking design provides a kind of two ESEM selective laser melting (SLM) shaped devices of light splitting single light source of large scale workbench, comprise the digital control scanning system of two scanning battle array mirrors with spectroscopy system, two scanning battle array mirrors and laser beam expanding lens group drive combination, two scanning battle array mirrors are arranged with rectangular shaping work district, in forming cavity, be full of inert gas, increase the shaping efficiency of selective laser melting, be applicable to manufacture large-sized precision part, the threedimensional model of realizing in two scanning battle array mirror situations is cut apart.
To achieve these goals, agent structure of the present invention comprises forming cavity, the first scanning battle array mirror, the second scanning battle array mirror, optical splitter, the first laser beam expanding lens, the second laser beam expanding lens, workbench, optical fiber, inert gas gas curtain, heating system, leading screw, stepper motor, powder charger, powder-wiping plate, useless powder collecting device, LASER Light Source, digital control system, oxygen level sensor and linear electric motors; The forming cavity upper side that is full of inert gas is provided with inert gas gas curtain and stops oxygen to enter, forming cavity top is provided with digital control system telecommunications and cease the first scanning battle array mirror and the second scanning battle array mirror that are connected, a first scanning battle array mirror, second scan gust mirror respectively with the first laser beam expanding lens, the second laser beam expanding lens is corresponding is connected; Between the first scanning battle array mirror and the second scanning battle array mirror, be connected with optical splitter the laser disperseing is imported to two battle array mirrors; The below of the first scanning battle array mirror and the second scanning battle array mirror is provided with the workbench of rectangle structure, is provided with stepper motor on workbench, is fixed with heating system and leading screw on stepper motor, and stepper motor drives workbench work by leading screw; The both sides of workbench are respectively arranged with powder charger and useless powder collecting device, are provided with the powder-wiping plate being driven by linear electric motors, for the lay of powder on powder charger; One end of LASER Light Source is electrically connected with digital control system, and the other end is connected with optical splitter photoelectricity by optical fiber; Forming cavity is connected with oxygen level sensor telecommunications breath, and oxygen level sensor can be measured the oxygen content in forming cavity.
Compared with prior art, its advantage is as follows in the present invention: the one, beam of laser is divided into respectively input scan battle array mirrors of two bundles, and its single light beam power is light source power 1/2; The 2nd, the sweep speed of scanning battle array mirror reaches 1.5m/s, and Scan orientation precision is less than 1 μ m/100mm; The 3rd, processing model data processing is simple, digital control system can Direct Recognition G code, and part model can, by system automatic segmentation, be offered respectively to the ESEM of different piece, scan respectively bisque by each scanning battle array mirror more simultaneously, thereby complete melting process; The 4th, forming part ability is strong, rectangle part that can moulding 1000X500X500mm, and forming parts efficiency improves 2 times than traditional SLM technique; It is simple in structure, and principle is reliable, uses flexibly, and easy to operate, shaping efficiency is high, and sweep speed is fast, and positioning precision is high, and cost is low.
Brief description of the drawings:
Fig. 1 is agent structure principle schematic of the present invention.
Detailed description of the invention:
Below by specific embodiment, also the present invention is described further by reference to the accompanying drawings.
Embodiment:
The agent structure of the present embodiment comprises forming cavity 1, the first scanning battle array mirror 2A, the second scanning battle array mirror 2B, optical splitter 3, the first laser beam expanding lens 4A, the second laser beam expanding lens 4B, workbench 5, optical fiber 6, inert gas gas curtain 7, heating system 8, leading screw 9, stepper motor 10, powder charger 11, powder-wiping plate 12, useless powder collecting device 13, LASER Light Source 14, digital control system 15, oxygen level sensor 16 and linear electric motors 17; Forming cavity 1 upper side that is full of inert gas is provided with inert gas gas curtain 7 and stops oxygen to enter, forming cavity 1 top is provided with digital control system 15 telecommunications and ceases the first scanning battle array mirror 2A and the second scanning battle array mirror 2B that are connected, a first scanning battle array mirror 2A, the second scanning battle array mirror 2B respectively with the first laser beam expanding lens 4A, second laser beam expanding lens 4B is corresponding is connected; Between the first scanning battle array mirror 2A and the second scanning battle array mirror 2B, be connected with optical splitter 3 laser disperseing is imported to two battle array mirrors; The below of the first scanning battle array mirror 2A and the second scanning battle array mirror 2B is provided with the workbench 5 of rectangle structure, on workbench 5, be provided with stepper motor 10, on stepper motor 10, be fixed with heating system 8 and leading screw 9, stepper motor 10 drives workbench 5 to work by leading screw 9; The both sides of workbench 5 are respectively arranged with powder charger 11 and useless powder collecting device 13, are provided with the powder-wiping plate 12 being driven by linear electric motors 17, for the lay of powder on powder charger 11; One end of LASER Light Source 14 is electrically connected with digital control system 15, and the other end is connected with optical splitter 3 photoelectricity by optical fiber 6; Forming cavity 1 is connected with oxygen level sensor 16 telecommunications breaths, and oxygen level sensor 16 can be measured the oxygen content in forming cavity 1.
The inert gas that the present embodiment relates to mainly comprises nitrogen and argon gas; The single beam laser that the optical splitter 3 relating to sends LASER Light Source 14 is divided into two bundles and passes to respectively the first scanning battle array mirror 2A and the second scanning battle array mirror 2B, and the sweep limits of the first scanning battle array mirror 2A and the second scanning battle array mirror 2B has coincidence; Part model, by installing automatic segmentation, offers respectively the ESEM of different piece, then scans respectively bisque by each scanning battle array mirror simultaneously, thereby completes melting process; The sweep speed of scanning battle array mirror is 1.5m/s, and Scan orientation precision is less than 1 μ m/100mm; The processing model data processing of the present embodiment is simple, digital control system can Direct Recognition G code, and by part model by system automatic segmentation, offer respectively the ESEM of different piece, scan respectively bisque by each scanning battle array mirror more simultaneously, thereby complete melting process, rectangle part that can moulding 1000X500X500mm, forming parts efficiency improves 2 times than traditional selective laser melting (SLM) technique.
The operation principle of the present embodiment is: digital control system 15 is processed into three-dimensional part model the file of STL form through software, this file is through supporting moulding, become G code according to corresponding technological parameter production and processing, start outside selective laser melting SLM forming machine, and start inert gas gas curtain protection 7, oxygen content in outside oxygen level sensor 16 is measured forming cavity 1 is lower than when setting value, start Composition, powder-wiping plate 12 is scraped metal dust to profiled member from powder charger 11 under the driving of linear electric motors 17, and as forming metal powder carrying platform, unnecessary powder enters useless powder collecting device 13, part model on workbench 5 is divided into two parts automatically, input respectively the first scanning battle array mirror 2A and the second scanning battle array mirror 2B and generate scanning pattern according to two region G codes, two-part intersection carries out multiple scanning by special algorithm, until All Ranges has been scanned, workbench 5 is under the drive of leading screw 9 and stepper motor 10, drop to level altitude, powder-wiping plate 12 repeats to scrape powder action, the first scanning battle array mirror 2A and the second scanning battle array mirror 2B multiple scanning action, until part machines.
Claims (1)
1. the two ESEM selective laser melting shaped devices of light splitting single light source, is characterized in that agent structure comprises forming cavity, the first scanning battle array mirror, the second scanning battle array mirror, optical splitter, the first laser beam expanding lens, the second laser beam expanding lens, workbench, optical fiber, inert gas gas curtain, heating system, leading screw, stepper motor, powder charger, powder-wiping plate, useless powder collecting device, LASER Light Source, digital control system, oxygen level sensor and linear electric motors; The forming cavity upper side that is full of inert gas is provided with inert gas gas curtain and stops oxygen to enter, forming cavity top is provided with digital control system telecommunications and cease the first scanning battle array mirror and the second scanning battle array mirror that are connected, a first scanning battle array mirror, second scan gust mirror respectively with the first laser beam expanding lens, the second laser beam expanding lens is corresponding is connected; Between the first scanning battle array mirror and the second scanning battle array mirror, be connected with optical splitter the laser disperseing is imported to two battle array mirrors; The below of the first scanning battle array mirror and the second scanning battle array mirror is provided with the workbench of rectangle structure, is provided with stepper motor on workbench, is fixed with heating system and leading screw on stepper motor, and stepper motor drives workbench work by leading screw; The both sides of workbench are respectively arranged with powder charger and useless powder collecting device, are provided with the powder-wiping plate being driven by linear electric motors, for the lay of powder on powder charger; One end of LASER Light Source is electrically connected with digital control system, and the other end is connected with optical splitter photoelectricity by optical fiber; Forming cavity is connected with oxygen level sensor telecommunications breath, and oxygen level sensor can be measured the oxygen content in forming cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410194084.7A CN103949638A (en) | 2014-05-09 | 2014-05-09 | Light-split single-light source double-scanning electron microscope type selective laser melting molding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410194084.7A CN103949638A (en) | 2014-05-09 | 2014-05-09 | Light-split single-light source double-scanning electron microscope type selective laser melting molding device |
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| CN103949638A true CN103949638A (en) | 2014-07-30 |
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| CN201410194084.7A Pending CN103949638A (en) | 2014-05-09 | 2014-05-09 | Light-split single-light source double-scanning electron microscope type selective laser melting molding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201901A1 (en) | 2018-02-07 | 2019-08-08 | Ford Global Technologies, Llc | Device and method for the additive production of three-dimensional structures |
Citations (6)
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| CN1363440A (en) * | 2001-11-22 | 2002-08-14 | 北京工业大学 | Selective laser evaporating-sintering technology and system for quickly shaping thin wall with powder material |
| EP1466718A2 (en) * | 2003-04-09 | 2004-10-13 | 3D Systems, Inc. | Sintering using thermal image feedback |
| CN201693175U (en) * | 2010-06-13 | 2011-01-05 | 华南理工大学 | Selective laser melting and forming device for medical magnesium alloy metal parts |
| CN102274968A (en) * | 2011-08-22 | 2011-12-14 | 华南理工大学 | Device for manufacturing nonlinear tree-shaped liquid suction core by selected region laser melting |
| CN103071797A (en) * | 2013-01-23 | 2013-05-01 | 西安铂力特激光成形技术有限公司 | Large-format selective laser melting (SLM) equipment of multi- galvanometer |
| WO2013092994A1 (en) * | 2011-12-23 | 2013-06-27 | Compagnie Generale Des Etablissements Michelin | Method and apparatus for producing three-dimensional objects |
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2014
- 2014-05-09 CN CN201410194084.7A patent/CN103949638A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363440A (en) * | 2001-11-22 | 2002-08-14 | 北京工业大学 | Selective laser evaporating-sintering technology and system for quickly shaping thin wall with powder material |
| EP1466718A2 (en) * | 2003-04-09 | 2004-10-13 | 3D Systems, Inc. | Sintering using thermal image feedback |
| CN201693175U (en) * | 2010-06-13 | 2011-01-05 | 华南理工大学 | Selective laser melting and forming device for medical magnesium alloy metal parts |
| CN102274968A (en) * | 2011-08-22 | 2011-12-14 | 华南理工大学 | Device for manufacturing nonlinear tree-shaped liquid suction core by selected region laser melting |
| WO2013092994A1 (en) * | 2011-12-23 | 2013-06-27 | Compagnie Generale Des Etablissements Michelin | Method and apparatus for producing three-dimensional objects |
| CN103071797A (en) * | 2013-01-23 | 2013-05-01 | 西安铂力特激光成形技术有限公司 | Large-format selective laser melting (SLM) equipment of multi- galvanometer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201901A1 (en) | 2018-02-07 | 2019-08-08 | Ford Global Technologies, Llc | Device and method for the additive production of three-dimensional structures |
| US11207735B2 (en) | 2018-02-07 | 2021-12-28 | Ford Global Technologies, Llc | Apparatus and method for the additive manufacturing of three-dimensional structures |
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Application publication date: 20140730 |