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Design and Analysis of a Hybrid Subtractive and Additive Manufacturing Unit

机译：减法与加法混合制造单元的设计与分析

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摘要

Automation in production of 3D printed parts, hybrid additive and subtractive machines, and post-processing of 3D printed parts are rapidly growing fields. Given the numerous advancements in the 3D printing industry as reported in this thesis, the lack of availability of a Do It Yourself (DIY) and low-cost hybrid additive and subtractive unit is identified and tackled. This thesis covers the mechanical design of a low-cost DIY, hybrid additive and subtractive unit using a robot arm to remove the 3D printing support structures. Since the removal of printed support structures has not been investigated in the scientific literature, in a first step, different cutting tools and speeds were analyzed with a hand-held Dremel 4000 power tool with regard to cut quality and cutting forces. An off-the-shelf tool bit, a High-Speed steel cutter, at 15000 rpm yielded the best results. Furthermore, a hybrid machine was conceptualized, consisting of additive and subtractive subsystems. The constraints are a working volume of 6 cubic inches and costs below $5000. The additive system is based on following components: X, Y and Z Motor Holders, Filament Holder, and 3D Printing Arm, which can be printed by the DIY user, and off-the-shelf hardware like NEMA 17 stepper motors. The subtractive system is based on the following components: Motor Holder, Linkbot Mounting Interface, and Connector Arm, which are also designed to be 3D printed by the DIY users. For both subsystems, the off-the-shelf parts are specified, and technical drawings for 3D printing and assembly are provided. The critical 3D printed parts are analyzed with regard to their maximum distortion and strength during operation.
机译：3D打印零件，混合加减法机器的自动化生产以及3D打印零件的后处理是快速增长的领域。考虑到本论文中报道的3D打印行业的众多进步，发现并解决了自己动手做（DIY）和低成本的混合增减单元的问题。本论文涵盖了使用机械臂去除3D打印支撑结构的低成本DIY，混合加减单元的机械设计。由于科学文献中尚未研究去除印刷支撑结构的问题，因此第一步，使用手持式Dremel 4000电动工具对不同的切割工具和速度进行了分析，以评估切割质量和切割力。使用现成的工具高速钢刀具，转速为15000 rpm，效果最佳。此外，概念化了一种混合机器，它由加法和减法子系统组成。限制条件是工作体积为6立方英寸，成本低于5000美元。添加剂系统基于以下组件：可由DIY用户打印的X，Y和Z电机支架，灯丝支架和3D打印臂，以及像NEMA 17步进电机这样的现成硬件。减法系统基于以下组件：电机支架，Linkbot安装接口和连接器臂，它们也设计为由DIY用户进行3D打印。对于这两个子系统，都指定了现成的零件，并提供了用于3D打印和组装的技术图纸。分析关键的3D打印部件在运行过程中的最大变形和强度。

著录项

  • 作者

    Ghadamli, Farhad.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Mechanical engineering.
  • 学位 M.S.
  • 年度 2017
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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