CN106583722A - 一种激光选区熔化成形设备 - Google Patents
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Abstract
本发明提供了一种激光选区熔化成形设备,其包括:成型舱和补粉装置,所述成型舱设置于补粉的下方,所述补粉装置包括补粉仓、控制系统、进气阀、清洗阀、氧传感器、压力传感器和出粉开关阀,所述进气阀和清洗阀分别设置于补粉仓的两侧,所述氧传感器和压力传感器均设置于补粉仓的顶部,所述出粉开关阀设置于补粉仓的底部。与现有技术相比,本发明具有如下的有益效果:1、实现了在不开启成形舱门的情况,即可补粉,不会使成形舱室内部氧含量超标,确保成形零件的质量;2、在补粉后,不需要清洗成形舱室内部的气氛,省去了大量时间,提高了效率。
Description
技术领域
本发明涉及一种激光选区熔化成形设备,属于激光选区成形技术领域。
背景技术
目前,在激光选区熔化成形设备工作前,要将其料缸内填加成形零件所需要的粉末。但是由于部分零件过大,往往料缸内的粉末不足以成形完零件,这样就需要给激光选区熔化成形设备的料缸补粉。
现有主要的补粉方法是打开成形舱门,操作人员使用上料铲,一铲一铲地向料缸内填加粉末。但是这样的方式就使成形零件长时间暴露在空气中,不能避免零件发生氧化,不能保证成形零件的质量,而且补粉后,需要清洗成形舱室内部的气体,使其氧含量达标后方可开始成形,降低了生产效率。
针对现有激光选区熔化成形设备补粉过程中零件容易氧化和补粉效率低的缺点,采用在全新补粉方法,在需要补粉时,能避免零件发生氧化问题,确保零件成形的质量,提高生产效率。
发明内容
本发明的目的是克服现有技术的不足,提供一种激光选区熔化成形设备。
本发明是通过以下技术方案实现的:
一种激光选区熔化成形设备,其包括:成型舱和补粉装置,所述成型舱设置于补粉的下方,所述补粉装置包括补粉仓、控制系统、进气阀、清洗阀、氧传感器、压力传感器和出粉开关阀,所述进气阀和清洗阀分别设置于补粉仓的两侧,所述氧传感器和压力传感器均设置于补粉仓的顶部,所述出粉开关阀设置于补粉仓的底部。
作为优选方案,所述控制系统分别与进气阀、氧传感器、压力传感器、清洗阀和出粉开关阀电连接。
作为优选方案,所述成型舱内设置有回收缸、成形缸和料缸,所述料缸位于补粉装置的补粉仓的正下方。
一种基于前述的激光选区熔化成形设备的补粉方法,其包括如下步骤:
S1:预设补粉仓内的压力为5~6mbar,在压力超过6mbar时,清洗阀自动打开,通过置换方式使补粉仓内的氧含量一直低于1000ppm;
S2:当需要补粉时,暂停激光熔化选区成形的操作,降低料缸的高度,打开出料开关阀,使料粉在重力及补粉仓内压力的作用下落入料缸内;在此过程中,确保补粉仓内氧含量控制在1000ppm以下和压力在5~6mbar之间,保证在补粉过程中不会造成成形舱室内部氧含量超标,确保成形零件不会发生氧化,从而保证成形零件的质量;
S3:补粉结束后,关闭出粉开关阀,在确保成形舱的氧含量不超标的情况下,继续进行激光熔化选区成形的操作;通过控制系统关闭气动开关阀,由于成形舱室内部氧含量没有超标,激光选区熔化成形设备可以马上开始工作,节省了时间,提高了生产效率;
如果一次补粉不足以满足成形使用,可以重复上述过程,继续补粉。
与现有技术相比,本发明具有如下的有益效果:
1、实现了在不开启成形舱门的情况,即可补粉,不会使成形舱室内部氧含量超标,确保成形零件的质量;
2、在补粉后,不需要清洗成形舱室内部的气氛,省去了大量时间,提高了效率。
附图说明
通过阅读参照以下附图对非限制性实施例所作的详细描述,本发明的其它特征、目的和优点将会变得更明显:
图1为本发明的激光选区熔化成形设备的结构示意图;
图中:1、成型舱;11、回收缸;12、成型缸;13、料缸;14、惰性气体入口;15、辅粉系统;2、补粉仓;21、进气阀;22、氧传感器;23、压力传感器;24、清洗阀;25、出粉开关阀;26、控制系统;3、保护镜;4、激光器;5、扩束镜;6、扫描系统。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明,但不以任何形式限制本发明。应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进。这些都属于本发明的保护范围。
本发明的一种激光选区熔化成形设备的结构如图1所示,包括:成型舱1和补粉装置,所述成型舱1设置于补粉装置的下方,补粉装置包括补粉仓2、控制系统26、进气阀21、清洗阀24、氧传感器22、压力传感器23和出粉开关阀25,进气阀21和清洗阀24分别设置于补粉仓2的两侧,氧传感器和22压力传感器23均设置于补粉仓2的顶部,出粉开关阀25设置于补粉仓2的底部。
控制系统26分别与进气阀21、氧传感器22、压力传感器23、清洗阀24和出粉开关阀25电连接。
成型舱1内设置有回收缸11、成形缸12和料缸13,料缸13位于补粉装置的补粉仓2的正下方。
除此之外,本发明中还包括保护镜3、激光器4、扩束镜5和扫描系统6,保护镜3设置于成型缸12的正上方,扫描系统6设置于保护镜3的正上方,扩束镜5设置于激光器4和扫描系统6之间。
一种基于前述的激光选区熔化成形设备的补粉方法,其包括如下步骤:
S1:预设补粉仓内的压力为5~6mbar,在压力超过6mbar时,清洗阀自动打开,通过置换方式使补粉仓内的氧含量一直低于1000ppm;
S2:当需要补粉时,暂停激光熔化选区成形的操作,降低料缸的高度,打开出料开关阀,使料粉在重力及补粉仓内压力的作用下落入料缸内;
S3:补粉结束后,关闭出粉开关阀,在确保成形舱的氧含量不超标的情况下,继续进行激光熔化选区成形的操作。
以上对本发明的具体实施例进行了描述。需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变形或修改,这并不影响本发明的实质内容。
Claims (3)
1.一种激光选区熔化成形设备,其特征在于,包括:成型舱和补粉装置,所述成型舱设置于补粉的下方,所述补粉装置包括补粉仓、控制系统、进气阀、清洗阀、氧传感器、压力传感器和出粉开关阀,所述进气阀和清洗阀分别设置于补粉仓的两侧,所述氧传感器和压力传感器均设置于补粉仓的顶部,所述出粉开关阀设置于补粉仓的底部。
2.如权利要求1所述的激光选区熔化成形设备,其特征在于,所述控制系统分别与进气阀、氧传感器、压力传感器、清洗阀和出粉开关阀电连接。
3.如权利要求1所述的激光选区熔化成形设备,其特征在于,所述成型舱内设置有回收缸、成形缸和料缸,所述料缸位于补粉装置的补粉仓的正下方。
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