面向自适应加工的精锻叶片前后缘模型重构

doi:10.7527/S1000-6893.2014.0171

材料工程与机械制造

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面向自适应加工的精锻叶片前后缘模型重构

蔺小军¹, 陈悦¹, 王志伟¹, 郭研², 高源¹, 张新鸽¹

1. 西北工业大学现代设计与集成制造技术教育部重点实验室, 西安 710072;
2. 西安航天发动机厂, 西安 710100

收稿日期:2014-06-11 修回日期:2014-07-28 出版日期:2015-05-15 发布日期:2014-08-25
通讯作者: 蔺小军Tel.: 029-88460426 E-mail: linxj@nwpu.edu.cn E-mail:linxj@nwpu.edu.cn
作者简介:蔺小军男,博士,高级工程师。主要研究方向:精密几何测量、CAD/CAM。 Tel: 029-88460426 E-mail: linxj@nwpu.edu.cn;陈悦女,硕士研究生。主要研究方向:精密几何测量、CAD/CAM。 E-mail: 335227807@qq.com;王志伟男,博士研究生。主要研究方向:集成制造技术、CAD/CAM。 E-mail: zwwang1987@126.com
基金资助:
国家科技重大专项(2013ZX04011031)

Model restructuring about leading edge and tailing edge of precision forging blade for adaptive machining

LIN Xiaojun¹, CHEN Yue¹, WANG Zhiwei¹, GUO Yan², GAO Yuan¹, ZHANG Xin'ge¹

1. The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China;
2. Xi'an Aerospace Engine Factory, Xi'an 710100, China

Received:2014-06-11 Revised:2014-07-28 Online:2015-05-15 Published:2014-08-25
Supported by:
National Science and Technology Major Project(2013ZX04011031)

摘要/Abstract

摘要：

针对精锻叶片前后缘数控加工在加工边界出现"台阶"等问题,提出面向自适应加工的模型重构方法。首先,根据精锻叶片的特点给出前后缘加工工艺方案。其次,根据工艺方案建立在机测量模型并进行路径规划。在此基础上,依据前后缘实际几何型面参数以及理论模型各截面前后缘圆弧圆心和半径允差,提出重构模型圆弧圆心及半径搜索算法;根据各截面的测量点拟合线、理论截面线以及搜索的圆弧圆心和半径,建立重构前后缘模型。最后,通过对比重构模型与理论模型的偏差以及数控加工试验证明该方法能够有效地减小锻造叶片叶身实际型面与前后缘在衔接处的"台阶"缺陷问题,为复合制造工艺背景下精锻叶片前后缘加工成型提供依据。

关键词: 精锻叶片, 前后缘, 自适应加工, 路径规划, 模型重构, 搜索算法

Abstract:

In order to solve the problems such as "steps" which are caused by precision forging NC machining of the leading edge and the tailing edge in machining boundary, the model reconstruction method of adaptive machining is proposed. Firstly, according to the characteristics of precision forging blades, the machining program of leading edge and tailing edge is put forward. Secondly, according to the machining program, on-machine measurement model and the path planning are proposed. On this basis, according to the actual geometrical parameters of the leading edge and the tailing edge, as well as the tolerance of the center of circle and arc radius in the leading edge and the tailing edge of the theoretical models, a search algorithm is put forward to ascertain a new arc radius and center of the circle of the reconstruction model. Besides, according to the fitting line of the measurement points in each cross section line, theoretical cross section line and the circular arc of the search center and radius,models of the leading edge and the tailing edge are reconstructed. Finally, by comparing the deviation between the reconstruction model and the theoretical model, and the NC machining test, the proposed method is proved to be efficient in weakening the adverse effect of the "steps" between the actual type surface of the forging blade and the leading edge and tailing edge. In addition, this method can also provide evidence for the machining forming in the leading edge and tailing edge of precision forging blade under the background of the composite manufacturing process.

Key words: precision forging blade, leading edge and tailing edge, adaptive machining, path planning, model restructuring, search algorithm

中图分类号:

V261

蔺小军, 陈悦, 王志伟, 郭研, 高源, 张新鸽. 面向自适应加工的精锻叶片前后缘模型重构[J]. 航空学报, 2015, 36(5): 1695-1703.

LIN Xiaojun, CHEN Yue, WANG Zhiwei, GUO Yan, GAO Yuan, ZHANG Xin'ge. Model restructuring about leading edge and tailing edge of precision forging blade for adaptive machining[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(5): 1695-1703.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

面向自适应加工的精锻叶片前后缘模型重构

Model restructuring about leading edge and tailing edge of precision forging blade for adaptive machining

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