CN109421260A - 用于添加式地制造三维物体的设备 - Google Patents

用于添加式地制造三维物体的设备 Download PDF

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CN109421260A
CN109421260A CN201711128301.2A CN201711128301A CN109421260A CN 109421260 A CN109421260 A CN 109421260A CN 201711128301 A CN201711128301 A CN 201711128301A CN 109421260 A CN109421260 A CN 109421260A
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B·莫里茨
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CL Schutzrechtsverwaltung GmbH
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Abstract

本发明涉及一种用于通过依次逐层地选择性地照射和固化由能够借助能量束固化的建造材料构成的层来添加式地制造三维物体的设备(1),所述设备具有承载装置(2),所述承载装置具有用于承载建造材料和/或待被建造的至少一个物体的至少一个承载元件(3)和配置为驱动所述至少一个承载元件(3)的驱动单元(4),其中,所述驱动单元(4)借助至少一个联接装置(5)与所述承载元件(3)联接,其中提供配置为紧固所述承载元件(3)与所述至少一个联接装置(5)的联接的至少一个紧固单元(10),其中,所述紧固单元(10)配置为在所述联接装置(5)上施加一轴向地指向的紧固力。

Description

用于添加式地制造三维物体的设备
技术领域
本发明涉及用于通过依次逐层地选择性地照射和固化由可借助能量束固化的建造材料构成的层来添加式地制造三维物体的设备,所述设备具有承载装置,所述承载装置具有用于承载建造材料和/或待被建造的至少一个物体的至少一个承载元件以及配置为驱动所述至少一个承载元件的驱动单元,其中,所述驱动单元借助至少一个联接装置与所述承载元件联接。
背景技术
这类设备在现有技术中是已知的,包括配置为产生能量束以选择性地照射并由此固化建造材料的照射装置。建造材料典型地通过配属于承载装置的承载元件运送,其中,形成可被能量束选择性地照射的建造平面。在制造过程中,依次对多个建造材料层进行照射,其中,在每个照射步骤之后,将新的建造材料层施加在建造平面上,且施加在之前所施加的和/或经照射的建造材料层上。
因此,在完成对层的照射之后,承载元件沿Z方向——即,向下——运动,从而提供用于新的建造材料层的空间。为了允许承载元件的可运动布置,承载装置包括借助至少一个联接装置——例如主轴(spindle)——与承载元件联接的驱动单元。借助驱动单元,可驱动联接装置,并且由此使与联接装置连接的承载元件运动。
此外,在现有技术中已知的是,通过将联接装置夹紧在承载元件的对应凹部中来使联接装置与承载元件联接。不利的是,联接装置会脱接/脱开,即,从凹部中被拉出,例如由于承载元件与设备的壳体之间的摩擦,其中,承载元件上的对应摩擦力可能超过夹紧力,从而导致联接装置从承载元件上脱接。联接装置与承载元件的脱接导致承载元件的运动性能损失。从而可能出现设备的故障。
发明内容
因此,目标在于提供一种故障安全性得以提高的设备。
该目标通过根据权利要求1所述的设备创造性地实现。本发明的有利实施例取决于从属权利要求。
本文所描述的设备为一种用于借助依次逐层地选择性地照射和固化由可借助能量束固化的粉末建造材料(“建造材料”)构成的层来添加式地制造三维物体——例如技术结构件——的设备。相应的建造材料可以是金属、陶瓷或聚合物粉末。相应的能量束可以为激光束或电子束。相应的设备可以为例如选择性激光烧结设备、选择性激光熔化设备或选择性电子束熔化设备。
所述设备包括可在其运行期间操作的多个功能单元。示例性的功能单元为过程室、照射装置以及流产生装置,所述照射装置配置为利用至少一个能量束来选择性地照射布置在过程室中的建造材料层,所述流产生装置适配为产生以给定的流动特性——例如,给定的流动轮廓、流速等——至少部分地流经过程室的气态流体流。所述气态流体流在流经过程室的同时能够运载/携带/夹带未固化的建造材料微粒,尤其是在设备运行期间产生的烟雾或烟雾残留物。所述气态流体流典型地为惰性的,即典型地为惰性气体——例如氩气、氮气、二氧化碳等——的流。
本发明基于如下构思:提供至少一个配置为紧固承载元件与至少一个联接装置的联接的紧固单元,其中,所述紧固单元配置为在联接装置上施加一轴向地定向的紧固力。与现有技术不同,本发明提出在联接装置上施加一轴向地指向的紧固力,而不是将联接装置夹紧至承载元件——在这种情况下,夹紧力典型地施加在径向方向上。
因此,轴向地作用在联接装置上的紧固力与例如由于摩擦而施加在联接装置上并且定向为将联接装置从承载元件、例如承载元件中的凹部中拉出的力相抵消。因此,由于提供了紧固单元来施加紧固力,所述紧固力直接抵消导致联接装置从承载元件脱接的力,从而使得联接装置与承载元件的联接得以加强。因此,所述紧固单元确保了联接装置不会从承载元件中被拉出,因此确保了联接装置与承载元件之间的联接。承载装置可被配属给如前文所述用于添加式制造过程的不同类型的设备,例如,承载装置可被配属给建造模块,其中,承载装置承载建造材料和当前被建造的物体,尤其是承载装置可承载建造板,在该建造板上施加待被能量束选择性地照射的建造材料层。还可将承载装置配属给计量模块,所述计量模块为添加式制造过程提供建造材料。此外,紧固单元可提供密封功能,其中,紧固单元密封毗邻紧固单元的两个空间。
根据所述设备的有利实施例,所述联接装置包括驱动部和保持部,其中,所述联接装置配置为在驱动部与驱动单元相互作用,并且在保持部与承载元件相互作用。换而言之,驱动单元在驱动部与联接装置相互作用,即,在驱动部处在联接装置上施加一驱动力。保持部被看作是联接元件与承载元件联接的区域,例如,联接装置的接纳在承载元件的凹部处的区域。尤其是,驱动部和保持部布置在联接装置的不同位置,例如,驱动部布置在联接装置的底端周围,而保持部布置在联接装置的顶端周围。
所述设备还可在如下方面被改进:即,所述紧固单元配置为机械地紧固联接元件相对于承载元件的位置。因此,所述紧固单元使联接元件和承载元件相对于彼此固定,并且由此确保施加在联接装置上的驱动力借助联接元件与承载元件的联接而传输到承载元件上。因此,由于承载元件可连同联接装置一起被驱动,从而可确保与承载装置联接或包含在联接装置中的建造板的位置可以以预定的方式设置。
有利地,联接装置部分地布置在承载元件的开口中。根据该实施例,联接装置的一部分布置在承载元件的开口中,尤其是联接装置的保持部接纳在承载元件的开口中。因此,承载元件设置有联接装置可被插入其中的开口。所述开口还提供联接装置的引导并且固定横向相对位置(尤其是X方向和Y方向)。
所述设备还可在如下方面被改进:所述联接装置突出至承载元件的开口中,其中,紧固单元毗邻开口布置在联接装置的保持部中,其中,驱动部布置在所述开口的另一侧,并且紧固单元配置为防止联接装置沿驱动部的方向从所述开口被拉出。
因此,驱动部和保持部布置在联接装置的不同位置处,其中,联接装置利用保持部突出至承载元件的开口中。所述紧固单元毗邻所述开口布置在联接装置的保持部中,其中,所述紧固单元关于驱动部布置在所述开口的相对侧。从而,所述紧固单元确保所述联接装置不能从开口被拉出。
有利地,所述紧固单元的物理和/或几何尺寸、尤其是直径比所述开口更大。该实施例有利地防止了联接装置从承载元件的开口被拉出,因为紧固单元的物理和/或几何尺寸比开口更大,从而防止了紧固单元穿过开口,并且由此确保联接装置相对于承载元件的开口的相对位置。
借助所述设备的另一实施例,所述紧固单元和所述开口配置成形锁合/形状配合连接机构。从而,通过开口和紧固单元相互配合——尤其是紧固单元与开口接合——而形成形锁合连接机构。因此,即使在不施加力的状态下也能防止联接装置从承载元件上脱接。
根据所述设备的一个有利实施例,所述紧固单元建造成紧固盘。从而,紧固盘配置为由于紧固盘保持与承载元件的开口周围的至少一部分接触而防止联接装置从开口中被拉出。
所述紧固单元可以借助锁定装置——尤其是螺钉和/或螺栓——连接至所述联接装置,其中,锁定装置将紧固单元锁定至保持部,尤其是锁定至联接装置的顶部。例如,所述紧固单元可以被拧入至联接装置的保持部,其中,所述保持部位于联接装置的顶部。所述锁定装置(即,螺钉)提供一轴向紧固力,以抵消趋于使联接装置从开口拉出的力。
根据所述设备的另一实施例,可提供两个紧固单元,其中,毗邻开口的两侧各就位有一个紧固单元。因此,两个紧固单元彼此相对地就位,其中,承载元件布置在两个紧固单元之间。通过在开口的两侧分别设置紧固单元,不仅在趋于使联接装置从开口拉出的力方面,而且在趋于使联接装置从开口推出的力方面,确保了联接装置相对于承载元件的相对位置。换而言之,通过提供布置在开口的相对侧的两个紧固单元,可加强联接装置与承载元件之间的联接。
有利地,联接装置可建造为主轴。因此,驱动单元可用于驱动主轴螺母,所述主轴螺母驱动主轴并且由此使主轴以及使所联接的承载元件随主轴一起向上和/或向下运动。
此外,所述设备可包括配置为将联接装置夹紧在开口中的夹紧装置。从而,所述夹紧装置配置为在联接装置上施加一夹紧力,以使联接装置相对于开口固定。
附图说明
参考附图来描述本发明的示例性实施例。唯一的附图(图1)为示出创造性的设备的示意图。
具体实施方式
唯一的附图(图1)示出了用于通过依次逐层地选择性地照射和固化由可借助能量束固化的建造材料构成的层来添加式地制造三维物体的设备1的细节。设备1包括具有承载元件3的承载装置2,例如在制造过程期间,所述承载元件3承载携带有建造材料和待被建造的物体的建造板。还可能的是,承载元件直接承载建造材料。
承载装置2还包括配置为驱动承载元件3的驱动单元4,例如马达。为了驱动承载元件3,驱动单元4配置为与联接装置5——所述联接装置5与承载元件3联接——相互作用。根据该示例性实施例,联接装置5被建造成带螺纹的主轴,所述主轴与被驱动单元4驱动的主轴螺母6相互作用。主轴螺母6还可被当作是驱动单元4的一部分,尤其是驱动单元4、联接装置5以及主轴螺母6可形成主轴驱动机构。随着主轴螺母6例如关于设备1的壳体固定就位,驱动主轴螺母6导致联接装置5的横向运动。换而言之,驱动主轴螺母6会在联接装置5的驱动部7施加一驱动力,从而引起联接装置5向上或向下(与主轴螺母6的旋转方向对应)运动。联接装置5还包括基本上布置在联接装置5的顶部的保持部8。联接装置5利用保持部8突出至承载元件3的开口9中。
为了确保联接装置5与承载元件3的联接,提供第一紧固单元10,所述第一紧固单元10借助锁定装置11——例如螺钉——锁定至联接装置5。紧固单元10接合开口9,从而与承载元件3形成形锁合连接机构。
如图中可得知,紧固单元10的直径12大于开口9的直径13。因此,紧固单元10防止联接装置5由于施加在联接装置5上的驱动力和承载元件3与设备1的壳体(未示出)之间的摩擦而从开口9被拉出,即穿过开口9被拉出。
第一紧固单元10、14确保联接装置5无法由于驱动力以及承载元件3与设备1的壳体之间的摩擦而从开口9中被拉出。
此外,设备1包括夹紧装置14,所述夹紧装置14配置为在联接装置5上施加夹紧力,以将联接装置5夹紧在开口9中。附加的夹紧力相对于承载元件3固定联接装置5,并且尤其防止联接装置5在开口9中相对于承载元件3旋转。

Claims (12)

1.一种用于通过依次逐层地选择性地照射和固化由能够借助能量束固化的建造材料构成的层来添加式地制造三维物体的设备(1),所述设备具有承载装置(2),所述承载装置具有用于承载建造材料和/或待被建造的至少一个物体的至少一个承载元件(3)和被构造用于驱动所述至少一个承载元件(3)的驱动单元(4),其中,所述驱动单元(4)借助至少一个联接装置(5)与承载元件(3)联接,其特征在于,所述设备包括至少一个紧固单元(10),所述紧固单元被构造用于紧固承载元件(3)与所述至少一个联接装置(5)的联接,其中,所述紧固单元(10)被构造用于在联接装置(5)上施加一轴向指向的紧固力。
2.根据权利要求1所述的设备,其特征在于,联接装置(5)包括驱动部(7)和保持部(8),其中,联接装置(5)被构造为在所述驱动部(7)中与所述驱动单元(4)相互作用,而在所述保持部(8)中与承载元件(3)相互作用。
3.根据权利要求1或2所述的设备,其特征在于,所述紧固单元(10)被构造用于机械地固定联接装置(5)相对于承载元件(3)的位置。
4.根据前述权利要求中的一项所述的设备,其特征在于,联接装置(5)部分地布置在承载元件(3)的开口(9)中。
5.根据权利要求4所述的设备,其特征在于,联接装置(5)突出于承载元件(3)的开口(9),其中,所述紧固单元(10)毗邻所述开口(9)布置在联接装置(5)的保持部(8)中,其中,所述驱动部(7)布置在所述开口(9)的另一侧,并且所述紧固单元(10)被构造用于防止联接装置(5)朝所述驱动部(7)的方向从所述开口(9)被拉出。
6.根据权利要求4或5所述的设备,其特征在于,所述紧固单元(10)的物理和/或几何尺寸(12)、尤其是直径比所述开口(9)更大。
7.根据权利要求4至6中的一项所述的设备,其特征在于,所述紧固单元(10)和所述开口(9)被构造成形锁合连接机构。
8.根据权利要求4至7中的一项所述的设备,其特征在于,保持部(8)位于联接装置(5)的面向承载元件(3)的上部区域中。
9.根据前述权利要求中的一项所述的设备,其特征在于,所述紧固单元(10)被构造为紧固盘。
10.根据前述权利要求中的一项所述的设备,其特征在于,所述紧固单元(10)借助锁定装置(11)——尤其是螺钉和/或螺栓——连接至联接装置(5),其中,所述锁定装置(11)将所述紧固单元(10)锁定至保持部(8),尤其是锁定至联接装置(5)的顶部。
11.根据前述权利要求中的一项所述的设备,其特征在于,联接装置(5)为主轴。
12.根据权利要求4至11中的一项所述的设备,其特征在于,所述设备包括被构造为将联接装置(5)夹紧在开口(9)中的夹紧装置(14)。
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