CN103691950B - The 3D Method of printing of small aluminium alloy wave guide member - Google Patents
The 3D Method of printing of small aluminium alloy wave guide member Download PDFInfo
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- CN103691950B CN103691950B CN201310713251.XA CN201310713251A CN103691950B CN 103691950 B CN103691950 B CN 103691950B CN 201310713251 A CN201310713251 A CN 201310713251A CN 103691950 B CN103691950 B CN 103691950B
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Abstract
The invention discloses a kind of 3D Method of printing of small aluminium alloy wave guide member, for solving the technical problem of existing aluminium droplet 3D Method of printing poor accuracy.Technical scheme is according to small aluminium alloy wave guide member cavity shape and dimensional requirement, adopts soluble material to prepare small core; Control the pointwise in whose surfaces of even aluminium droplet, pile up layer by layer, print small aluminium alloy wave guide member profile; Then through integrally annealed, core dissolution and inner surface glossing, outer shape is met, the aluminium alloy wave guide member that cavity shape, dimensional accuracy and inside surface roughness require.The present invention is piled up layer by layer by the even aluminium molten drop pointwise that size is small, the size that is shaped is small, wall thickness is thin, the aluminium alloy wave guide member of complex contour, utilizes the shape of soluble core, dimensional accuracy effectively can ensure small aluminium alloy wave guide member cavity shape, dimensional accuracy.
Description
Technical field
The present invention relates to a kind of 3D Method of printing, particularly a kind of 3D Method of printing of small aluminium alloy wave guide member.
Background technology
Aluminium waveguide have lightweight, without the need to silver-plated, low cost and other advantages, in the radar antenna of the Aeronautics and Astronautics aircraft such as unmanned plane, lighter-than-air flight device, satellite, deep space probe, there is extensive use.Along with this type of radar system is towards " miniaturization ", " lightweight " and " Highgrade integration " future development, require radar antenna aluminium wave guide member, as twisted waveguide, the conversion of square square waveguide, loudspeaker etc., size is less, wall thickness is thinner and cavity shape is more complicated, and this proposes challenge to the preparation method of existing wave guide member.
Conventional aluminium wave guide member preparation technology has Plastic Forming, hot investment casting and accurate welding etc., there is larger difficulty for the preparation of during small aluminium alloy wave guide member.The aluminium alloy waveguide plastic forming process being representative with multi-pass drawing, is only applicable to the shaping of the tubular waveguide of single cross sectional shape, and the special-shaped thin wall wave guide member of inapplicable variable cross-section is shaped; Precision casting process is subject to the restriction of shaping dies, is difficult to cast the thin-wall aluminum alloy wave guide member that cavity shape is complicated, size is small; There is tiny thin-wall sheet material Set and Positioning difficulty, weld the problems such as yielding in accurate butt welding process, also more difficult for the small aluminium alloy wave guide member that is shaped.
The metal 3D printing technique of rising in recent years is that complex-shaped metal parts is shaped and provides a brand-new method.Document " Freeformfabricationofaluminumpartsbydirectdepositionofmo ltenaluminum.JournalofMaterialsProcessingTechnology173 (2006): 209 – 212 " discloses a kind of aluminium droplet 3D Method of printing, carry out pointwise successively pile up by spraying even aluminium droplet, can realize the free forming of Al-alloy parts, this provides a new way for preparing complicated shape alumiaum article fast.But the accessory size deviation that existing metallic aluminium molten drop printing technique is shaped and surface roughness are comparatively large, are difficult to the requirement meeting wave guide member cavity shape, dimensional accuracy and surface roughness.Up to now, a kind of 3D printing technique is not also had can to realize the quick preparation of small aluminium alloy wave guide member.
Summary of the invention
In order to overcome the deficiency of existing aluminium droplet 3D Method of printing poor accuracy, the invention provides a kind of 3D Method of printing of small aluminium alloy wave guide member.The method, according to small aluminium alloy wave guide member cavity shape and dimensional requirement, adopts soluble material to prepare small core; Control the pointwise in whose surfaces of even aluminium droplet, pile up layer by layer, print small aluminium alloy wave guide member profile; Then through integrally annealed, core dissolution and inner surface glossing, outer shape is met, the aluminium alloy wave guide member that cavity shape, dimensional accuracy and inside surface roughness require.The present invention is piled up layer by layer by the even aluminium molten drop pointwise that size is small, and the size that is shaped is small, wall thickness is thin, the aluminium alloy wave guide member of complex contour.Meanwhile, the shape of soluble core, dimensional accuracy is utilized effectively can to improve small aluminium alloy wave guide member cavity shape and dimensional accuracy.
The technical solution adopted for the present invention to solve the technical problems: a kind of 3D Method of printing of small aluminium alloy wave guide member, is characterized in comprising the following steps:
Step one, according to aluminium alloy wave guide member cavity shape and dimensional requirement, adopt soluble material prepare soluble core 8;
Step 2, soluble core 8 is arranged on the core support 6 of four axes motion platform, controls soluble core 8 by the X-axis 12 of motion platform, Y-axis 13, Z axis 14 and R axle 9 and move according to desired guiding trajectory;
Step 3, removal aluminum alloy blank oxide skin are placed in crucible 1, and in injection environment, fill inert gas, the oxygen content in guarantee low-oxygen environment 15 is lower than 1PPM;
Step 4, start up system heating schedule, be progressively heated to more than aluminum alloy melt phase line 100 ~ 150 DEG C by crucible 1 by induction heater 2;
Step 5, measure crucible 1 temperature by thermocouple 7, measured the surface temperature of soluble core 8 by infrared radiation thermometer 10, control the power of induction heater 2 and soluble core 8 and the distance of crucible 1, realize crucible 1 and control with soluble core 8 temperature;
The micro-droplet generating device of step 6, startup crucible 1 inside, sprays metal droplet 4 by nozzle 3;
Step 7, location spray crucible 1 and the relative position of soluble core 8, start print routine, make metal droplet 4 carry out pointwise by desired guiding trajectory on the surface at soluble core 8 and successively pile up forming shaped product 5;
Step 8, complete deposition after, take out molded part 5, entirety carries out temper, eliminates the thermal stress of molded part 5;
Step 9, dissolving soluble core 8, the inner surface of polished aluminum alloy wave guide member, is met the aluminium alloy wave guide member of outer shape, cavity shape, dimensional accuracy and surface roughness requirements.
The invention has the beneficial effects as follows: the method, according to small aluminium alloy wave guide member cavity shape and dimensional requirement, adopts soluble material to prepare small core; Control the pointwise in whose surfaces of even aluminium droplet, pile up layer by layer, print small aluminium alloy wave guide member profile; Then through integrally annealed, core dissolution and inner surface glossing, outer shape is met, the aluminium alloy wave guide member that cavity shape, dimensional accuracy and inside surface roughness require.The present invention is piled up layer by layer by the even aluminium molten drop pointwise that size is small, and the size that is shaped is small, wall thickness is thin, the aluminium alloy wave guide member of complex contour.Meanwhile, utilize the shape of soluble core, dimensional accuracy, effectively improve small aluminium alloy wave guide member cavity shape and dimensional accuracy.
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the 3D Method of printing device of the small aluminium alloy wave guide member of the present invention.
Fig. 2 is the print procedure schematic diagram of the 3D Method of printing of the small aluminium alloy wave guide member of the present invention.
Fig. 3 (a) is the inventive method embodiment 2 electromagnetic horn core used; Fig. 3 (b) is the small electromagnetic horn that the inventive method embodiment 2 is printed by 3D.
In figure, 1-crucible, 2-induction heater, 3-nozzle, 4-metal droplet, 5-molded part, 6-core support, 7-thermocouple, 8-soluble core, 9-R axle, 10-infrared radiation thermometer, 11-R axle rotary electric machine, 12-X axle, 13-Y axle, 14-Z axle, 15-low-oxygen environment, 16-initiation layer droplet, 17-side's square conversion waveguide finished parts, 18-electromagnetic horn core, the small electromagnetic horn of 19-.
Detailed description of the invention
The present invention is described in detail with reference to Fig. 1-3.
Embodiment 1: the printing speed of square square conversion waveguide.
According to wave guide member cavity shape, dimensional requirement, soluble material is adopted to prepare soluble core 8.Soluble core 8 is arranged on the core support 6 of four axes motion platform, in four axes motion platform, X-axis 12, Y-axis 13 realize the rectilinear motion of soluble core 8, and Z axis 14 realizes metal droplet 4 and piles up distance adjustment, and R axle 9 realizes the rotary motion of soluble core 8.
Prepare crucible 1, aluminum alloy materials and spray environment.Adopt chemicophysical method to remove the oxide skin of aluminum alloy material surface, drying is placed in crucible 1.Be filled with inert gas in crucible 1 and low-oxygen environment 15, and ensure that in low-oxygen environment 15, oxygen content is lower than 1PPM by the method for circulation deoxygenation.Start up system heating schedule, crucible 1 is progressively heated to more than aluminum alloy melt phase line 100 ~ 150 DEG C by induction heater 2, the temperature of crucible 1 is measured by thermocouple 7, the surface temperature of soluble core 8 is measured by infrared radiation thermometer 10, control the power of induction heater 2 and the distance of soluble core 8 and crucible 1, realize crucible 1 and control with soluble core 8 temperature.
According to the path that outer shape and the aluminium molten drop heat of shaping waveguide transmit, determine the track that droplet prints.The relative position of crucible 1 and core 8 is sprayed in location, start the micro-droplet generating device of crucible 1 inside, metal droplet 4 is ejected by nozzle 3, start deposition procedure, the metal droplet 4 of injection is made to be printed on soluble core 8 on the surface, by coordinating track, the temperature of metal droplet 4, ensure that the metal droplet 4 that pointwise is successively piled up accurately is located, fully sprawls and well merged each other on matrix; In print procedure, soluble core 8 is moved along Y-axis 13, after the horizontal plane of soluble core 8 deposits a line metal droplet 4, R axle rotary electric machine 11 rotates soluble core 8 makes its side horizontal, continue deposition a line, after completing initiation layer droplet 16 printing, mobile X-axis 12, carry out the accumulation of next week droplet, finally realize the pointwise of rectangular waveguide, print line by line.
After completing wave guide member printing-forming, carry out aftertreatment technology to ensure cavity shape, dimension precision requirement.Take out molded part 5, then carry out integrally annealed process, the thermal stress produced during to eliminate droplet rapid solidification; Dissolve soluble core 8, by inner surface glossing, to obtain the inside surface roughness met the demands, the finally side's of obtaining square conversion waveguide finished parts 17.
Embodiment 2: the printing speed of small aluminium alloy electromagnetic horn.
The present embodiment is substantially identical with the preparation technology being embodiment 1, different cavity shapes and profile.According to cavity shape, the dimensional requirement of electromagnetic horn, soluble material is adopted to make electromagnetic horn core 18.Electromagnetic horn core 18 is arranged on the support 6 of four axes motion platform, in four axes motion platform, X-axis 12, Y-axis 13 realize the rectilinear motion of electromagnetic horn core 8, and Z axis 14 realizes metal droplet 4 and piles up distance adjustment, and R axle 9 realizes the rotary motion of electromagnetic horn core 18.
Carry out droplet on electromagnetic horn core 18 surface to pile up line by line, after completing a row metal deposition, transfer next line to and print, finally print small electromagnetic horn 19, until whole product printing-forming.After completing processing, carry out integrally annealed process, the thermal stress produced when eliminating droplet rapid solidification, finally dissolve electromagnetic horn core 18, by inner surface glossing, to obtain small electromagnetic horn 19.
Claims (1)
1. a 3D Method of printing for small aluminium alloy wave guide member, is characterized in that comprising the following steps:
Step one, according to aluminium alloy wave guide member cavity shape and dimensional requirement, adopt soluble material prepare soluble core (8);
Step 2, soluble core (8) is arranged on the core support (6) of four axes motion platform, controls soluble core (8) by the X-axis (12) of motion platform, Y-axis (13), Z axis (14) and R axle (9) and move according to desired guiding trajectory;
Step 3, removal aluminum alloy blank oxide skin are placed in crucible (1), and in injection environment, fill inert gas, the oxygen content in guarantee low-oxygen environment (15) is lower than 1PPM;
Step 4, start up system heating schedule, be progressively heated to more than aluminum alloy melt phase line 100 ~ 150 DEG C by crucible (1) by induction heater (2);
Step 5, measure crucible (1) temperature by thermocouple 7, the surface temperature of soluble core (8) is measured by infrared radiation thermometer (10), control the power of induction heater (2) and the distance of soluble core (8) and crucible (1), realize crucible (1) and control with soluble core (8) temperature;
The micro-droplet generating device of step 6, startup crucible (1) inside, by nozzle (3) ejection metal droplet (4);
Step 7, location spray the relative position of crucible (1) and soluble core (8), start print routine, make metal droplet (4) carry out pointwise by desired guiding trajectory on the surface at soluble core (8) and successively pile up forming shaped product (5);
Step 8, complete deposition after, take out molded part (5), entirety carries out annealing in process, eliminate molded part (5) thermal stress;
Step 9, dissolving soluble core (8), the inner surface of polished aluminum alloy wave guide member, is met the aluminium alloy wave guide member of outer shape, cavity shape, dimensional accuracy and surface roughness requirements.
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| CN105014957B (en) * | 2014-04-15 | 2017-03-29 | 上海智位机器人股份有限公司 | The method of 3D printer and its controlling cashier power-cut-off contiuous printing |
| WO2017155683A1 (en) * | 2016-03-09 | 2017-09-14 | Commscope Technologies Llc | 3-d printing process for forming flat panel array antenna |
| WO2017203568A1 (en) * | 2016-05-23 | 2017-11-30 | 三菱電機株式会社 | Waveguide device |
| CN106159453B (en) * | 2016-06-20 | 2019-05-07 | 清华大学 | A kind of aluminium alloy electromagnetic horn and its manufacturing method towards low rail positioning load |
| CN106176000B (en) * | 2016-08-31 | 2018-03-23 | 杭州捷诺飞生物科技有限公司 | For preparing the 3D printing device and equipment of angiocarpy bracket |
| CN106180558B (en) * | 2016-09-21 | 2019-03-12 | 成都创慧科达科技有限公司 | A kind of 3D printing system and Method of printing based on titanium or titanium alloy casting graphite mould |
| CN106399898B (en) * | 2016-09-27 | 2018-08-17 | 西北工业大学 | Aircraft damages metal droplet and sprays 3D printing in-situ rapid renovation method |
| CN107351374A (en) * | 2017-07-17 | 2017-11-17 | 西安工业大学 | A kind of process for machining and manufacturing of high frequency antenna feed |
| CN108225859B (en) * | 2018-01-09 | 2020-09-01 | 上海理工大学 | Method for preparing single-fracture rock sample based on 3D printing technology |
| CN110026880A (en) * | 2019-04-15 | 2019-07-19 | 中国电子科技集团公司第二十研究所 | The inner surface abrasive Flow of 3D printing thin wall special-shaped electromagnetic horn polishes tooling |
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| JP2007001164A (en) * | 2005-06-24 | 2007-01-11 | Mimaki Engineering Co Ltd | Inkjet printer for solid medium printing and printing method using the same |
| US8246888B2 (en) * | 2008-10-17 | 2012-08-21 | Stratasys, Inc. | Support material for digital manufacturing systems |
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