An investigation on adaptively machining the leading and tailing edges of an SPF/DB titanium hollow blade using free-form deformation
An investigation on adaptively machining the leading and tailing edges of an SPF/DB titanium hollow blade using free-form deformation
复制标题
利用自由变形自适应加工 SPF/DB 钛空心叶片前缘和后缘的研究
DOI：
10.1016/j.cja.2017.03.011
复制
发表时间：
2017-04
影响因子：
5.7
通讯作者：
Zhiqiang Li
中科院分区：
文献类型：
--
作者：
Zhengcai Zhao;Jiuhua Xu;Yucan Fu;Zhiqiang Li
钛合金空心叶片具有重量轻、结构强度高的特点，广泛应用于现代先进航空发动机。超塑成形/扩散连接（SPF/DB）结合数控（NC）铣削是制造钛空心叶片的主要解决方案。在SPF/DB工艺中，由于多次热压循环会导致形状偏差，因此很难通过铣削工艺来制造前缘和后缘。本文提出了一种新的自适应加工方法，利用自由变形来解决这个问题。采用在机测量方法对某空心叶片的实际SPF/DB外形进行了检测。然后采用改进的ICP算法将测量点数据与名义SPF/DB形状进行匹配，建立测量点与名义SPF/DB形状上对应点的点对，并约束最终名义形状的最大修改量。基于点对之间的位移，迭代计算精确的FFD体积。通过在变形空间中嵌入最终名义形状，构建了空心叶片的新的最终形状。最后，进行了一系列的测量和加工试验，其结果验证了所提出的自适应加工方法的可行性。
Titanium hollow blades are characterized with lightweight and high structural strength, which are widely used in advanced aircraft engines nowadays. Superplastic forming/diffusion bonding (SPF/DB) combined with numerical control (NC) milling is a major solution for manufacturing titanium hollow blades. Due to the shape deviation caused by multiple heat and pressure cycles in the SPF/DB process, it is hard to manufacture the leading and tailing edges by the milling process. This paper presents a new adaptive machining approach using free-form deformation to solve this problem. The actual SPF/DB shape of a hollow blade was firstly inspected by an on-machine measurement method. The measured point data were matched to the nominal SPF/DB shape with an improved ICP algorithm afterwards, by which the point-pairs between the measurement points and their corresponding points on the nominal SPF/DB shape were established, and the maximum modification amount of the final nominal shape was constrained. Based on the displacements between the point-pairs, an accurate FFD volume was iteratively calculated. By embedding the final nominal shape in the deformation space, a new final shape of the hollow blade was built. Finally, a series of measurement and machining tests was performed, the results of which validated the feasibility of the proposed adaptive machining approach.
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DOI：
10.1145/1409625.1409629
发表时间：
2008-10
期刊：
ACM Trans. Graph.
影响因子：
--
作者：
J. Gain;D. Bechmann
通讯作者：
J. Gain;D. Bechmann
影响因子：
2.5
作者：
Cowles, BA
通讯作者：
Cowles, BA
影响因子：
5.7
作者：
Rufeng Xu;Zhitong Chen;Chen Wu-yi;Xianzhen Wu;Jianjun Zhu
通讯作者：
Rufeng Xu;Zhitong Chen;Chen Wu-yi;Xianzhen Wu;Jianjun Zhu
DOI：
10.1145/15922.15903
发表时间：
1986-08
期刊：
Proceedings of the 13th annual conference on Computer graphics and interactive techniques
影响因子：
--
作者：
T. Sederberg;S. Parry
通讯作者：
T. Sederberg;S. Parry
影响因子：
2.3
作者：
D. Sanders;M. Ramulu;P. Edwards;A. Cantrell
通讯作者：
D. Sanders;M. Ramulu;P. Edwards;A. Cantrell