Journal of Zhejiang University

Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.3 P.157-171

A morphing machining strategy for artificial bone*

Author(s): Wen-feng Gan,Jian-zhong Fu,Hong-yao Shen,Zhi-wei Lin
Affiliation(s): 1. . State Key Laboratory of Fluid Power Transmission and Control, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Corresponding email(s): fjz@zju.edu.cn
Key Words: Morphing machining strategy (MMS), Energy-based morphing, Tool path generation, T-spline surface, Artificial bone

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Wen-feng Gan, Jian-zhong Fu, Hong-yao Shen, Zhi-wei Lin. A morphing machining strategy for artificial bone[J]. Journal of Zhejiang University Science A, 2014, 15(3): 157-171.

@article{title="A morphing machining strategy for artificial bone",
author="Wen-feng Gan, Jian-zhong Fu, Hong-yao Shen, Zhi-wei Lin",
journal="Journal of Zhejiang University Science A",
volume="15",
number="3",
pages="157-171",
year="2014",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1300274"
}

%0 Journal Article
%T A morphing machining strategy for artificial bone
%A Wen-feng Gan
%A Jian-zhong Fu
%A Hong-yao Shen
%A Zhi-wei Lin
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 3
%P 157-171
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300274

TY - JOUR
T1 - A morphing machining strategy for artificial bone
A1 - Wen-feng Gan
A1 - Jian-zhong Fu
A1 - Hong-yao Shen
A1 - Zhi-wei Lin
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 3
SP - 157
EP - 171
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300274

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: In this work, a novel morphing machining strategy (MMS) is proposed. In the method, the workpiece is progressively carved out from the stock. Pitfalls in conventional iso-height strategy, such as sharp edges and unevenly distributed left-over materials, are overcome. Moreover, to calculate different levels in the MMS, an energy-based morphing algorithm is proposed. Finally, the proposed strategy is employed in the machining of artificial bone represented by a t-spline surface. The excellent properties of T-spline, such as expressing complex shapes with a single surface, have been well adopted to artificial bone fabrication. Computer simulation and the actual machining of the middle finger bone show the feasibility of the proposed strategy.

一种基于曲面变形的人工骨骼渐进式加工方法

研究目的：研究人工骨骼等细长工件的无弯折加工方法。
创新要点：1.提出了一种基于曲面变形的渐进式加工方法，该方法保证加工余量在全曲面均匀分布，防止工件弯折；2.利用能量最小化实现T样条曲面的渐进变形；3.将该方法应用于以T样条曲面表示的人工指骨加工中。
研究方法：1.算法总体分为生成多层变形曲面和层内刀具路径规划两部分（见图5）；2.对T样条曲面采用基于能量最小化的变形方法，以加工切深作为变形约束条件，生成多层变形曲面作为每刀的加工目标形状（见图10）；3.每层变形曲面内按限残高标准生成刀具路径（见图12）。
重要结论：采用该加工方法可以提高细长形工件的加工质量，保证加工后形状误差不超限。

关键词：渐进式加工；能量最小化曲面变形；T样条曲面；人工骨骼