CN105904732B - A kind of guider and implementation for being used for fiber-wall-element model in fiber composite powder selective laser sintering - Google Patents

A kind of guider and implementation for being used for fiber-wall-element model in fiber composite powder selective laser sintering Download PDF

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Publication number
CN105904732B
CN105904732B CN201610354604.5A CN201610354604A CN105904732B CN 105904732 B CN105904732 B CN 105904732B CN 201610354604 A CN201610354604 A CN 201610354604A CN 105904732 B CN105904732 B CN 105904732B
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China
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fiber
pectinate
powdering
guide rod
rotation platform
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CN105904732A (en
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姜胜强
张黎
叶璇
叶一璇
谭援强
刘思思
胡聪芳
高伟
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Xiangtan University
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Xiangtan University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention discloses a kind of guider and implementation for being used for fiber-wall-element model in fiber composite powder selective laser sintering, the guider of fiber-wall-element model of the invention includes powdering roller, horizontal tray, multistage pectinate fibers guide rod and rotation platform；The multistage pectinate fibers guide rod is fixed on the horizontal tray and adjacent with the powdering roller；The rotation platform is arranged in moulding cylinder.Its implementation is：In powdering, by the collective effect of pectinate fibers guide rod and powdering roller, the effective direction for guiding fiber to be moved along powdering roller is arranged；After one layer of sintering, rotation platform drives sintered specimen to rotate a certain angle, again powdering, and then rotation platform resets and carries out next layer of sintering, and constantly repeats said process.The present invention is simple in construction, can effectively control arrangement of the fiber along different directions in sample sinter layer, effectively solve the problems, such as current fiber composite dusty material sintered specimen anisotropy.

Description

A kind of guiding dress for being used for fiber-wall-element model in fiber composite powder selective laser sintering Put and implementation
Technical field
The invention belongs to selective laser sintering field, and in particular to one kind is used for fiber composite powder selective laser and burnt The guider and implementation of fiber-wall-element model in knot.
Background technology
Selective laser sintering（Selective Laser Sintering, abbreviation SLS）Be be widely used at present it is fast Fast forming technique, its moulding process principle are：During processing, powder is preheating to the temperature of slightly less than its fusing point, Ran Hou first Powder is paved in the presence of roller；Laser beam is selectively sintered according to layering cross section information under the control of the computer, Next layer of sintering is carried out after the completion of one layer again, removes unnecessary powder after all having sintered, then obtains printed part.The skill Art has the features such as manufacturing process is simple, and degree of flexibility is high, and material selection range is wide, utilization rate is high, and cost is low, and shaping speed is fast, By more and more extensive attention.
The selection of SLS technologies is relatively broad at present, including：Nylon, wax, ABS, resin wrap sand, polycarbonate, metal and pottery Porcelain powder etc..By taking most widely used nylon powder material as an example, after laser sintered, the intensity of molding part is relatively low, main It is that its quality is loose, density is relatively low to want reason.To improve the intensity of molding part, researcher, which uses, adds linear fiber etc. in powder Reinforcement improves the intensity of molding part.But prior art and method still can not effectively control the orientation of fibrous material in the powder Arrangement.As shown in Figure 1, under the horizontal movement effect of roller, fiber causes big portion by gradually in being paved in powdering layer The fiber-wall-element model divided is arranged along roller horizontal movement direction, and the fiber orientation distribution of other method is then less, so as to directly lead Cause mechanical property of the sample after sintering in roller horizontal movement direction best, and be much larger than the mechanical property in other directions, So as to limit fibre reinforced materials further applying in selective laser sintering.
The content of the invention
In order to solve the above problems, the present invention provides one kind and taken for fiber in fiber composite powder selective laser sintering To guider and implementation.
The technical scheme that patent of the present invention uses is：One kind is used for fiber in fiber composite powder selective laser sintering and taken To guider, it is characterised in that including powdering roller, horizontal tray, multistage pectinate fibers guide rod and rotation platform；Institute Multistage pectinate fibers guide rod is stated to be fixed on the horizontal tray and adjacent with the powdering roller；The rotation platform arrangement In moulding cylinder.
Above-mentioned is used in fiber composite powder selective laser sintering in the guider of fiber-wall-element model, the multistage comb Shape fibre guide bar is divided into three-level, including prerotation vane and connecting rod：Prerotation vane described in first order pectinate fibers guide rod it Between spacing be about 20 times of avarage fiber diameters and be fixed in the connecting rod；Described in the pectinate fibers guide rod of the second level Spacing between prerotation vane is about 10 times of avarage fiber diameters and is fixed in the connecting rod；Third level pectinate fibers is oriented to Spacing described in bar between prerotation vane is about 5 times of avarage fiber diameters and is fixed in the connecting rod.
Above-mentioned is used in fiber composite powder selective laser sintering in the guider of fiber-wall-element model, the horizontal support Along carriage rail horizontal movement, three square openings are provided with horizontal tray under the migration of the powdering roller for frame, are used To assemble the multistage pectinate fibers guide rod, and positioned by holding screw.
Above-mentioned is used in fiber composite powder selective laser sintering in the guider of fiber-wall-element model, the rotary flat Platform is arranged in moulding cylinder, and rotation platform is rotated by motor driven worm-and-wheel gear；Wherein, the worm and gear machine The worm gear of structure is connected with the push rod of the rotation platform by spline pair, and worm screw is connected with the electric machine main shaft.
A kind of to be used for the implementation that fiber-wall-element model is oriented in fiber composite powder selective laser sintering, specific steps are such as Under：
（1）Lay fiber composite powder in advance in powder feeding cylinder, composite powder is ejected, in powdering, it is fine to pass through pectination The collective effect of guide rod and powdering roller is tieed up, the effective direction for guiding fiber to be moved along powdering roller is arranged；
（2）After one layer of sintering, the worm-and-wheel gear immediately below motor driving moulding cylinder drives rotation platform to rotate, together When rotation platform drive sintered specimen to rotate a certain angle, powdering again, then rotation platform reset, realize in sintered powder Fiber into different directions ordered arrangement, carry out next layer of sintering；
（3）Continuous repeat step（2）, until all layers are completed to sinter, finally obtain sintered specimen.
Brief description of the drawings
Fig. 1 is the fiber orientation distribution schematic diagram of prior art.
Fig. 2 is the structural representation of apparatus of the present invention.
Fig. 3 is the structural representation of multistage pectinate fibers guide rod in Fig. 2.
Fig. 4 is the structural representation of rotation platform and worm-and-wheel gear in Fig. 2.
Embodiment
Referring to Fig. 2, the guiding dress disclosed by the invention for being used for fiber-wall-element model in fiber composite powder selective laser sintering Put mainly by powdering roller 4, horizontal tray 3, carriage rail 13, multistage pectinate fibers guide rod（First order pectinate fibers is oriented to Bar 7, second level pectinate fibers guide rod 6, third level pectinate fibers guide rod 5）, rotation platform 9, worm-and-wheel gear 10 and electricity Machine 11 is formed.
Referring to Fig. 2, Fig. 3 and Fig. 4, the fiber-wall-element model in fiber composite powder selective laser sintering that is used for of the invention is oriented to Implementation, it is specific as follows：
（1）Three square openings are provided with described horizontal tray 3, for assembling the multistage pectinate fibers guide rod, And positioned by holding screw 2, horizontal tray 3 is under the migration of the powdering roller 4 along the horizontal movement of carriage rail 13. Powder feeding cylinder 8 rises certain distance, and moulding cylinder 12 declines certain distance, powder sent out, multistage pectinate fibers guide rod and powdering Roller 4 moves together along X-direction, and multistage pectinate fibers guide rod is unified by the fiber-wall-element model being laid in advance in sintered powder And after ordered arrangement, powder is compacted by powdering roller 4, the laser beam 14 then sent using laser aid 1 is entered to above-mentioned powder Row first layer sinters；
（2）The worm gear of the worm-and-wheel gear 10 is combined with the bottom push rod of rotation platform 9 by spline pair, worm screw and electricity The main shaft of machine 11 connects, and powder feeding cylinder 8 rises certain distance again, and moulding cylinder 12 declines certain distance, and rotation platform 9 is along Y direction Simultaneously, motor 11 drives worm-and-wheel gear 10 to move, and rotation platform 9 is rotated into a certain angle for motion, again after powdering, electricity Machine 11 is inverted, and rotation platform 9 is resetted, and realizes that the fiber that will be laid in advance in sintered powder arranges into different directions, then Next layer of sintering is carried out to above-mentioned powder using the laser beam 14 that laser aid 1 is sent；
（3）Constantly repeat the above steps（2）, until all sinter layers are completed to sinter, finally obtain sintered specimen.

Claims (2)

  1. A kind of 1. guider for being used for fiber-wall-element model in fiber composite powder selective laser sintering, it is characterised in that including Powdering roller, horizontal tray, multistage pectinate fibers guide rod and rotation platform；The multistage pectinate fibers guide rod is fixed on institute State on horizontal tray and adjacent with the powdering roller；The rotation platform is arranged in moulding cylinder；The multistage pectinate fibers Guide rod is divided into three-level, including prerotation vane and connecting rod：Described in first order pectinate fibers guide rod between prerotation vane between Away from about 20 times of avarage fiber diameters and it is fixed in the connecting rod；Prerotation vane described in the pectinate fibers guide rod of the second level Between spacing be about 10 times of avarage fiber diameters and be fixed in the connecting rod；Institute in third level pectinate fibers guide rod The spacing between prerotation vane is stated to be about 5 times of avarage fiber diameters and be fixed in the connecting rod.
  2. 2. a kind of be used for the implementation that fiber-wall-element model is oriented in fiber composite powder selective laser sintering, specific steps are such as Under：
    （1）Lay fiber composite powder in advance in powder feeding cylinder, composite powder is ejected, in powdering, led by pectinate fibers To the collective effect of bar and powdering roller, the effective direction for guiding fiber to be moved along powdering roller is arranged.
    （2）After one layer of sintering, the worm-and-wheel gear immediately below motor driving moulding cylinder drives rotation platform to rotate, and revolves simultaneously Turning platform drives sintered specimen to rotate a certain angle, again powdering, and then rotation platform resets, and realizes the fibre in sintered powder Different directions ordered arrangement is tieed up into, carries out next layer of sintering.
    （3）Continuous repeat step（2）, until all sinter layers are completed to sinter, finally obtain sintered specimen.
CN201610354604.5A 2016-05-26 2016-05-26 A kind of guider and implementation for being used for fiber-wall-element model in fiber composite powder selective laser sintering Expired - Fee Related CN105904732B (en)

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US10919286B2 (en) * 2017-01-13 2021-02-16 GM Global Technology Operations LLC Powder bed fusion system with point and area scanning laser beams
EP3444099A1 (en) * 2017-08-16 2019-02-20 CL Schutzrechtsverwaltungs GmbH Method for additively manufacturing of three-dimensional objects
CN108327257B (en) * 2018-05-03 2020-02-18 湘潭大学 Roller device for directional arrangement of fibers in selective laser sintering powder paving and implementation method
CN112810136A (en) * 2020-12-31 2021-05-18 湖南华曙高科技有限责任公司 Powder laying device for selective laser sintering, forming equipment and forming method thereof

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CN203470903U (en) * 2013-07-31 2014-03-12 济南大学 Quick forming powder spreading device
CN203635913U (en) * 2013-12-10 2014-06-11 华南理工大学 Powder spreading device of SLM equipment
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CN104498863A (en) * 2015-01-09 2015-04-08 北京工业大学 Fiber hairbrush scraper

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DE3011173A1 (en) * 1980-03-22 1981-10-01 Bühler-Miag GmbH, 3300 Braunschweig SCREENING MACHINE FOR CEREALS AND OTHERS GRAIN GOODS
CN1911638A (en) * 2006-08-25 2007-02-14 哈尔滨工业大学 Speading head device of fiber spreading equipment
CN102442546A (en) * 2011-09-09 2012-05-09 西北有色金属研究院 Powder spreading device for rapid forming equipment
CN203470903U (en) * 2013-07-31 2014-03-12 济南大学 Quick forming powder spreading device
CN203635913U (en) * 2013-12-10 2014-06-11 华南理工大学 Powder spreading device of SLM equipment
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