CN109476086A - 形成3d物体的装置 - Google Patents
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Abstract
本发明涉及一种用于由金属粉末形成3D物体的装置,其包括:递送装置,适于以足够高的速度发射出金属粉末流,使其能够在基体上形成固体;及定位装置,适于当粉末在所述基体上堆积起来时设置或调整所述递送装置与基体间的距离和/或角度;及控制装置,适于在物体成形时接收测得的表示物体状态的几何数据并响应于所述数据控制所述定位装置的调整以准确形成所述物体。
Description
技术领域
本发明涉及由金属粉末流形成3D物体的装置。
背景技术
以500-1000ms-1的速率将金属粉末冷喷涂至物体上以赋予其保护层是众所周知的。然而,就所有功能性目的而言,这些只是2D表面涂层,并不用于提供3D特征。已知的用于涂覆2D涂层的装置不能够控制粉末路径与其所充分接触的物体之间的关系进而实现3D特征的生成。本领域技术人员尚未开发出一种基于喷涂的金属粉末的3D生产技术。这可能是因为在粉末流中,位于粉末流中心的粒子的运动速度往往比位于边缘处的要大,结果导致颗粒沉积得不均匀。虽然对于2D涂层而言这并不是所关心的问题,但是用于形成3D物体的话确是不切实际的。
具体而言,由于位于射流横截面中心的粒子速度较高,而位于射流横截面外围处的粒子速度较低,从而会在基体与粉末流之间的界面上形成锥状结构。由于被沉积材料和粉末流所呈现的表面角被认为是影响沉积速率的关键因素,因此,这种锥形布置可能会减慢或阻碍有效沉积。结果,将射流保持在基体的单个点之上静止不动的行为可能会导致形成锥形形状,这种锥形形状会短暂地形成,然后在剩余粉末粒子从锥的倾斜面弹出时停止。申请人发现,通过适当地控制基体相对于粉末流的布置方式,可以方便地形成目标3D物体。
在本文中结合各种特征或步骤使用的“包括”一词不应排除存在其它特征或步骤。该术语不应以限制的方式来解释。
发明内容
根据本发明的一个方面,提供一种用于由金属粉末形成3D物体的装置,包括:
·递送装置,适于以足够高的速度发射出金属粉末流,使其能够在基体上形成固体;及
·定位装置,适于当粉末在所述基体上堆积起来时设置或调整所述递送装置与基体间的距离和/或角度;及
·控制装置,适于在物体成形时控制所述定位装置的调整。
所述基体可以也可以不构成所述装置的一部分,然而,在其不构成装置的一部分的情况下,为便于定义其它组件,还是会对其提及。所述基体可以是物体形成所在的基底、新物体的3D模板、或已经形成但需要修改或修复的3D物体。
可选地,所述递送装置和定位装置可以是同一组件的不同部分或方面。进一步可选的,它们可以是单独的组件。
可选地,所述粉末以大约200-2000m/s的速度从所述递送装置移动至所述基体。
可选地,所述粉末包括纯金属粉末或合金金属粉末,被雾化为平均粒径(直径)为5-50微米。
可选地,所述粉末包括市场上可获得的金属粉末,诸如例如325目并经水雾化的铜粉或铝粉。来自Alcoa公司的123级纯铝粉被认为适合于本发明的至少一些优选实施例。
可选地,所述粉末在0℃-500℃之间(例如,0℃-300℃之间)供给所述递送装置。
可选地,所述粉末在室温(例如,25℃)与500℃之间(例如,0℃-300℃之间)供给所述递送装置。
可选地,所述定位装置能够相对于所述递送装置移动所述基体。在一些实施例中,所述定位装置可以相对于所述基体移动所述递送装置。
可选地,所述定位装置能够保持或调整所述递送装置和所述基体间的垂直和水平间距。.
可选地,所述定位装置能够在至少两个轴上保持或调整所述递送装置与所述基体之间的角度关系。
可选地,所述装置适于通过涂覆一系列层来形成所述3D物体,其中,每一层都是由所述金属粉末形成。
可选地,所述递送装置包括喷嘴。
可选地,所述定位装置包括具有夹持所述基体的装置的臂。
可选地,所述控制装置包括适于依据要形成的3D物体向所述递送装置和所述定位装置发送控制信号的计算机化系统。
可选地,所述递送装置包括冷喷涂喷嘴。
可选地,所述装置包括壳体,适于防止或最大限度减少粉末从该装置出去。
可选地,所述装置包含3D扫描仪,以向所述控制装置提供几何数据,并且,基于所述数据,所述控制装置使所述递送装置和所述定位装置调整以准确形成所述物体。
可选地,所述定位装置包含在完成时便于所述物体自动弹出(ejection)的基体夹持器。
可选地,所述定位装置包括安装在线性导轨上的螺杆或皮带传动的运动轴,也被称为计算机数控(CNC)轴,其安装在所述基体上或所述递送装置上,另一者则保持静止不动;或者,所述基体和金属粉末供给装置都安装至单独的CNC运动控制轴。
附图说明
现将参照附图通过示例的方式对本发明的优选实施例进行描述,附图中:
图1是3D打印机的等距视图;
图2是等距视图,示出了所述打印机的某些内部部件;
图3是等距视图,示出了所述打印机一些部件的细节;及
图4说明了通过所述打印机形成物体的方式。
具体实施方式
参照图1-图3,特别是图3,3D打印机1具有机械臂2和喷嘴4,机械臂2具有夹具3,用于保持基体(未示出)。当打印机正在使用时,夹具3保持基体,从喷嘴4发射出经加热的高速增压空气流。给料器将金属粉末送至该空气中,使其也以高速度离开喷嘴,与基体接触。臂2可调节,以便金属粉末以所需距离和角度的矢量移动,使其以适于形成所需产品的方式与基体接触。当各层粉末在基体上堆积起来时,臂2重新定向以保持或调节与基体间的所需距离和角度。
参照图1,打印机置于易于管理的壳体5中。图2示出了不具有该壳体的打印机,特别是位于成形室(build chamber)6内的打印机。该成形室支持具有界面7的计算机化系统,界面7用于设置并向机械臂2和喷嘴4提供手动生成或自动计算机化的控制命令。成形室6具有用于在使用时方便观察打印机的窗口8和允许热空气逸出的上通风口9。
所述计算机化系统可适于解释CAD图,并利用这些图来确定发送到机械臂2和喷嘴4的控制信号的类型和数量。
图4示意性地示出了基体10,在基体10上形成有绕轴6的圆柱体。该圆柱体是以粉末沉积步骤或层11-15形成的。如图所示,该圆柱体不是以直接线性的方式形成的,而是以“鼓起(inflated)”的方式生成的,在这种方式中,每一层结合在一起就产生了整体的线性竖直维度。
所述3D打印机优选形成为在高速下工作,以便其能够准确地从粉末打印金属物体,并且对物体的几何形状具有最小的限制。
优选地,机械臂2使金属粉末束在基体表面上移动,以便金属粉末束保持与其与基体的接触点或形成在基体上的部分基本垂直。这可以通过打印机的计算机化系统的控制功能得以实现。如果需要,例如为了形成所需要的3D形状,打印机还可以将金属粉末束的角度重新定向成小于垂直方向。
在本发明的一些实施例中,机械臂2可包括五轴CNC坐标系(CNC frame)或六轴工业型手臂。选择其中一种或另一种可能取决于速度或准确度是否是最重要的考量因素。
在优选实施例中,成形室6用于物理上包含多余的粉末,以使其能够被收集和重新使用或回收。成形室6还使粉末远离附近的设备,当这类设备暴露于这些粉末中时会造成损坏。
在本发明的一些实施例中,对多余粉末的量进行感测,并调整控制参数来减少多余粉末的量,并由此降低相关危害的风险。
在本发明的一些实施例中,打印机具有位于成形室6内的3D表面扫描仪。其优选位于机械臂2可及范围内,并允许打印机在粉末沉积中断期间检查物体的成形级别。
在本发明的优选实施例中,将基体或喷嘴4或其二者附接至能够持续将粉末束的攻击角度重新定向并保持为基本垂直的运动控制系统是理想的。此外,精密数字控制系统可处理目标3D物体的几何结构,并生成合适的促进沉积的工具路径,从而生成与目标几何结构最匹配的3D项目。
虽然通过示例对一些优选实施例进行了描述,但应理解的是,在不脱离本发明范围的情况下可进行各种修改和改进。
Claims (18)
1.一种用于由金属粉末形成3D物体的装置,其特征在于其包括:
·递送装置,适于以足够高的速度发射出金属粉末流,使其能够在基体上形成固体;及
·定位装置,适于当粉末在所述基体上堆积起来时设置或调整所述递送装置与基体间的距离和/或角度;及
·控制装置,适于在物体成形时控制所述定位装置的调整。
2.根据权利要求1所述的装置,其特征在于所述粉末以200m/s-2000m/s的速度从所述递送装置移动至所述基体。
3.根据权利要求1或2所述的装置,其特征在于所述粉末包括纯金属粉末或合金金属粉末,被雾化为平均粒径为5-50微米。
4.根据权利要求1、2或3所述的装置,其特征在于所述粉末的温度为0℃-500℃之间。
5.根据前述任一权利要求所述的装置,其特征在于所述粉末的温度为0℃-300℃之间。
6.根据前述任一权利要求所述的装置,其特征在于所述定位装置能够相对于所述递送装置移动所述基体。
7.根据前述任一权利要求所述的装置,其特征在于所述定位装置能够相对于所述基体移动所述递送装置。
8.根据前述任一权利要求所述的装置,其特征在于所述定位装置能够保持或调整所述递送装置和所述基体间的垂直和水平间距。
9.根据前述任一权利要求所述的装置,其特征在于所述定位装置能够在至少两个轴上保持或调整所述递送装置与所述基体之间的角度关系。
10.根据前述任一权利要求所述的装置,其特征在于其适于通过涂覆一系列层来形成所述3D物体,其中,每一层都是由所述金属粉末形成。
11.根据前述任一权利要求所述的装置,其特征在于所述递送装置包括喷嘴。
12.根据前述任一权利要求所述的装置,其特征在于所述定位装置包括具有夹持所述基体的装置的臂。
13.根据前述任一权利要求所述的装置,其特征在于所述控制装置包括适于依据要形成的3D物体向所述递送装置和所述定位装置发送控制信号的计算机化系统。
14.根据前述任一权利要求所述的装置,其特征在于所述递送装置包括冷喷涂喷嘴。
15.根据前述任一权利要求所述的装置,其特征在于其包括壳体,适于防止或最大限度减少粉末从该装置出去。
16.根据前述任一权利要求所述的装置,其特征在于其包含3D扫描仪,以向所述控制装置提供几何数据,并且,基于所述数据,所述控制装置使所述递送装置和所述定位装置调整以准确形成所述物体。
17.根据前述任一权利要求所述的装置,其特征在于所述定位装置包含在完成时便于所述物体自动弹出的基体夹持器。
18.根据前述任一权利要求所述的装置,其特征在于所述定位装置包括安装在线性导轨上的螺杆或皮带传动的运动轴,其安装在所述基体上或所述递送装置上,其中一者或另一者则保持静止不动;或者,所述基体和金属粉末供给装置都安装至单独的轴。
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AU2016902183A AU2016902183A0 (en) | 2016-06-06 | Apparatus for forming 3D objects | |
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PCT/AU2017/050442 WO2017210718A1 (en) | 2016-06-06 | 2017-05-15 | Apparatus for forming 3d objects |
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CN109476086B CN109476086B (zh) | 2022-03-15 |
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EP (1) | EP3463812B1 (zh) |
JP (1) | JP6938624B2 (zh) |
CN (1) | CN109476086B (zh) |
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WO2019033156A1 (en) * | 2017-08-15 | 2019-02-21 | Effusiontech Pty Ltd | 3D PRINTER |
JP7472678B2 (ja) * | 2020-06-29 | 2024-04-23 | セイコーエプソン株式会社 | 立体物印刷装置および立体物印刷方法 |
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WO2002007952A2 (en) * | 2000-07-25 | 2002-01-31 | The Research Foundation Of State University Of New York | Method and apparatus for fine feature spray deposition |
US20100143700A1 (en) * | 2008-12-08 | 2010-06-10 | Victor K Champagne | Cold spray impact deposition system and coating process |
WO2013149291A1 (en) * | 2012-04-04 | 2013-10-10 | Commonwealth Scientific And Industrial Research Organisation | A process for producing a titanium load-bearing structure |
DE102013216439A1 (de) * | 2013-05-22 | 2014-11-27 | Siemens Aktiengesellschaft | Verfahren zum Erzeugen eines schalenförmigen Bauteils sowie zur Anwendung dieses Verfahrens geeignete Herstellungsanlage |
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WO2015157816A1 (en) * | 2014-04-15 | 2015-10-22 | Commonwealth Scientific And Industrial Research Organisation | Process for producing a preform using cold spray |
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ES2815048T3 (es) * | 2013-11-13 | 2021-03-29 | Abb Schweiz Ag | Sistema de impresión robótico en 3D |
KR101459284B1 (ko) * | 2014-04-18 | 2014-11-07 | 주식회사 스맥 | 삼차원 물체 제조장치 및 제조방법 |
BR112017025844A2 (pt) * | 2015-06-11 | 2018-08-14 | Effusiontech Pty Ltd | aparelho para formação de um objeto 3d a partir de pó e seu uso |
WO2017180314A1 (en) * | 2016-04-14 | 2017-10-19 | Desktop Metal, Inc. | Additive fabrication with support structures |
CN109476086B (zh) | 2016-06-06 | 2022-03-15 | 易福仁科技知产私人有限公司 | 形成3d物体的装置 |
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WO2002007952A2 (en) * | 2000-07-25 | 2002-01-31 | The Research Foundation Of State University Of New York | Method and apparatus for fine feature spray deposition |
US20100143700A1 (en) * | 2008-12-08 | 2010-06-10 | Victor K Champagne | Cold spray impact deposition system and coating process |
WO2013149291A1 (en) * | 2012-04-04 | 2013-10-10 | Commonwealth Scientific And Industrial Research Organisation | A process for producing a titanium load-bearing structure |
DE102013216439A1 (de) * | 2013-05-22 | 2014-11-27 | Siemens Aktiengesellschaft | Verfahren zum Erzeugen eines schalenförmigen Bauteils sowie zur Anwendung dieses Verfahrens geeignete Herstellungsanlage |
WO2015157816A1 (en) * | 2014-04-15 | 2015-10-22 | Commonwealth Scientific And Industrial Research Organisation | Process for producing a preform using cold spray |
CN104985813A (zh) * | 2015-06-23 | 2015-10-21 | 同济大学 | 一种基于冷喷涂的3d打印方法及系统 |
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JP6938624B2 (ja) | 2021-09-22 |
US20190344343A1 (en) | 2019-11-14 |
EP3463812B1 (en) | 2023-07-05 |
EP3463812C0 (en) | 2023-07-05 |
JP2019523830A (ja) | 2019-08-29 |
WO2017210718A1 (en) | 2017-12-14 |
BR112018074073A2 (pt) | 2019-03-06 |
EP3463812A1 (en) | 2019-04-10 |
US11344951B2 (en) | 2022-05-31 |
EP3463812A4 (en) | 2019-05-22 |
CN109476086B (zh) | 2022-03-15 |
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