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System Performance and Process Capability in Additive Manufacturing: Quality Control for Polymer Jetting

机译:增材制造中的系统性能和过程能力:聚合物喷射的质量控制

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摘要

Polymer-based additive manufacturing (AM) gathers a great deal of interest with regard to standardization and implementation in mass production. A new methodology for the system and process capabilities analysis in additive manufacturing, using statistical quality tools for production management, is proposed. A large sample of small specimens of circular shape was manufactured of photopolymer resins using polymer jetting (PolyJet) technology. Two critical geometrical features of the specimen were investigated. The variability of the measurement system was determined by Gage repeatability and reproducibility (Gage R&R) methodology. Machine and process capabilities were performed in relation to the defined tolerance limits and the results were analyzed based on the requirements from the statistical process control. The results showed that the EDEN 350 system capability and PolyJet process capability enables obtaining capability indices over 1.67 within the capable tolerance interval of 0.22 mm. Furthermore, PolyJet technology depositing thin layers of resins droplets of 0.016 mm allows for manufacturing in a short time of a high volume of parts for mass production with a tolerance matching the ISO 286 IT9 grade for radial dimension and IT10 grade for linear dimensions on the Z-axis, respectively. Using microscopy analysis some results were explained and validated from the capability study.
机译:基于聚合物的增材制造(AM)在批量生产中的标准化和实施方面引起了广泛的关注。提出了一种使用统计质量工具进行生产管理的增材制造系统和过程能力分析的新方法。使用聚合物喷射(PolyJet)技术,用光敏聚合物树脂制造了一个大的圆形小样本样品。研究了样品的两个关键几何特征。测量系统的可变性由量具的可重复性和再现性(Gage R&R)方法确定。根据定义的公差极限执行机器和过程功能,并根据统计过程控制的要求对结果进行分析。结果表明,EDEN 350系统功能和PolyJet工艺功能可在0.22 mm的有效公差范围内获得超过1.67的性能指数。此外,PolyJet技术可沉积0.016 mm的树脂液滴薄层,可在短时间内制造大量零件以进行批量生产,其公差与径向尺寸的ISO 286 IT9级和Z线性尺寸的IT10级相匹配轴。使用显微镜分析,对一些结果进行了解释,并从能力研究中得到了验证。

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