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Toolpath planning for multi-gantry additive manufacturing
IISE Transactions ( IF 2.6 ) Pub Date : 2020-07-14 , DOI: 10.1080/24725854.2020.1775915
Hieu Bui 1 , Harry A. Pierson 1 , Sarah Nurre Pinkley 1 , Kelly M. Sullivan 1
Affiliation  

Abstract

Additive Manufacturing (AM), specifically Fused Filament Fabrication (FFF) is revolutionizing the production of many products. FFF is one of the most popular AM processes because it is inexpensive, requires little maintenance, and has high material utilization. Unfortunately, long cycle times are a significant drawback that prevents FFF from being more widely implemented, especially for large-scale components. In response to this, printers that employ multiple independent FFF printheads simultaneously working on the same part have been developed, and multi-gantry configurations are now commercially available; however, there is a dearth of formal research on multi-gantry path planning, and current practices do not maximize printhead utilization or as-built mechanical properties. This article proposes a novel methodology for generating collision-free toolpaths for multi-gantry printers that yields shorter print times and superior mechanical properties compared with the state of the art. In this, a metaheuristic approach is used to seek near-optimal segmentation and scheduling of each layer while a collision checking and resolution algorithm enforces kinematic constraints to ensure collision-free solutions. Simulation is used to show the resulting makespan reduction for various layers, and the proposed methodology is physically implemented and verified. Tensile testing on samples printed via the current and proposed methods confirm that the proposed methodology results in superior mechanical properties.



中文翻译:

多机架增材制造的刀具路径规划

摘要

增材制造(AM),特别是熔融长丝制造(FFF)正在彻底改变许多产品的生产。FFF是最流行的增材制造工艺之一,因为它价格便宜,几乎不需要维护并且具有很高的材料利用率。不幸的是,较长的循环时间是一个严重的缺点,阻碍了FFF的广泛应用,尤其是对于大型组件。响应于此,已经开发出了在同一部件上同时使用多个独立FFF打印头的打印机,并且现在可以在市场上购买到多机架配置。但是,目前尚缺乏关于多机架路径规划的正式研究,并且当前的实践并未最大化打印头的利用率或建成后的机械性能。本文提出了一种用于为多机架打印机生成无碰撞刀具路径的新颖方法,与现有技术相比,该方法可缩短打印时间并具有出色的机械性能。在这种方法中,使用元启发式方法来寻找每个层的近乎最优的分割和调度,而冲突检查和解决算法则强制执行运动学约束以确保无冲突的解决方案。仿真用于显示各层的最终制造时间减少,并且所提出的方法已在物理上实施和验证。对通过当前和建议的方法打印的样品进行的拉伸测试证实,建议的方法可产生优异的机械性能。

更新日期:2020-07-14
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