Measured data-driven shape-adaptive machining via spatial deformation of tool cutter positions

Measured data-driven shape-adaptive machining via spatial deformation of tool cutter positions
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通过刀具位置的空间变形进行测量数据驱动的形状自适应加工

DOI:
10.1016/j.measurement.2018.11.051
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发表时间:
2019-03
期刊:
影响因子:
5.6
通讯作者:
Jiuhua Xu
Jiuhua Xu
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhengcai Zhao;Dawei Ding;Yucan Fu;Jiuhua Xu

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混合加工工艺在提高复杂结构件的加工效率和精度方面具有很大的优势。自适应加工可以解决混合加工过程中形状精度差和尺寸一致性差的过渡挑战。提出了一种基于模板刀具位置直接空间变形的形状自适应加工方法,可高效、快速地解决该问题。说明了形状自适应方法的框架,其中包括机器测量、全局空间变形和局部空间变形。介绍了使用触摸探头进行机器上测量的细节。采用基于体积的自由变形方法对模板刀具刀具位置进行全局变形。建立了一个三度bsamizier曲面,在其上局部投影刀具位置。最后,以涡轮叶片自适应加工为例,验证了测量驱动形状自适应加工方法的可行性。
Hybrid machining processes have great advantages on enhancing the machining efficiency and accuracy of complex structural parts. Adaptive machining can answer the transition challenges of poor shape accuracy and bad dimensional consistency in hybrid machining processes. A novel shape-adaptive machining approach via direct spatial deformation of template tool cutter positions is developed, which can solve the problems efficiently and quickly. The framework for shape-adaptive approach is illustrated, in which on-machine measurement, globally spatial deformation and locally spatial deformation are involved. The details of on-machine measurement using a touching probe are present. A volume-based free-form deformation method was used to deform the template tool cutter positions globally. A 3rd-degree Bézier surface is built on which the tool cutter positions were locally projected. Finally, a case study of adaptive machining turbine blade was carried out, the results of which validate the feasibility of proposed measured-driven shape-adaptive machining approach.
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