Laser Sintering Process Analysis: Application to Chromium-Cobalt Alloys for Dental Prosthesis Production
Laser Sintering Process Analysis: Application to Chromium-Cobalt Alloys for Dental Prosthesis Production
复制标题
激光烧结工艺分析：在牙修复体生产铬钴合金中的应用
DOI：
10.1115/esda2012-82108
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发表时间：
2012
影响因子：
3.9
通讯作者：
F. Razan
中科院分区：
文献类型：
--
作者：
S. Faure;L. Mercier;P. Didier;R. Roux;J. Coulon;S. Garel;J. Trenit;H. Buard;F. Razan
快速原型是构建原型的有效方法。这种工艺，现在被称为AM（增材制造），适用于实现功能单一零件或小批量生产。增材制造的演变现在是在批量生产的方式。在医疗应用领域，更准确地说，牙科，增材制造是一种增加元素数量的方法，与传统的失蜡铸造生产相比。为了提高生产质量，有必要对生产过程和性能进行高度的监控。在采用直接金属激光烧结（DMLS: Direct Metal Laser Sintering）的增材制造中，粉末质量、激光行为、烧结时间等参数都会对元件的生产质量产生影响，本研究的目的是利用DMLS系统（Phenix system PM100）研究批量生产的质量。该系统用于生产牙科用钴铬元素。这项研究历时6个月，记录了近120个产品的结果，重点是生产了大约7000个牙齿元素。在第一部分中，记录了每次生产的元件数量，室温和湿度测量，粉末重新装填，维护，生产停止和新操作员。对所生产的一些元素的材料性能，如尺寸性能、密度、孔隙率和结晶相进行监测。材料分析有助于确保Phenix系统生产的元素质量，并对结果进行了讨论。在第二部分中，我们着重于使用记录数据进行生产分析。通过分析可以确定2个比值：生产比RP定义为[元件数]/[产品数]，生产效率PE定义为RP/[停止生产数]。通过在phoenix系统上计算RP和PE值，建立了PM 100效率生产模型。pm100生产模型可以帮助理解提高生产比RP值导致生产效率PE高变化。另一方面，采集生产参数可以提高生产效率。ASME版权所有©2012
Rapid prototyping is an effective way to build prototypes. This process, now called AM (Additive Manufacturing), is suited to realize functional single part or for small batch production. Evolution of AM is now in the way of serial production. In the field of medical applications and more precisely dentistry, AM is a way of increasing numbers of elements produced compared to classic production by lost wax casting. To increase production quality, it is necessary to have a high monitoring and control of process and properties of production. In the case of AM using (DMLS: Direct Metal Laser Sintering), a lot of parameters can have an influence on the elements production quality such as powders quality, laser behavior or sintering time… The goal of this work is to study the serial production quality using a DMLS system (Phenix System PM100). This system is used in production of cobalt-chromium elements for dental applications. The study was done on a period of 6 months with recording results of almost 120 productions and was focused on a quantity of around 7000 dental elements produced.In a first part, number of elements per production, room temperature and hygrometry, powder reloading, maintenance, production stops and new operators are recorded. Material properties of some elements produced such as dimensional properties, density, porosity and crystallographic phases are monitored. Materials analysis has led to ensure the elements quality produced by the Phenix system and results are discussed in this work.In a second part, we focused on the production analysis with the recorded data. Analysis leads to define 2 ratios: production ratio RP defined as [Elements Number]/ [Productions Number] and the efficiency production PE defined as the ratio RP/[Stopped production number]. By calculating RP and PE values with collected data on the Phenix system, a PM 100 efficiency production modeling has been established.The PM 100 production modeling can help to understand that increasing the production ratio RP value leads to have efficiency production PE high variation. On another hand, collecting production parameters leads to increase production efficiency.Copyright © 2012 by ASME