基于虚拟控制面约束的机匣类零件工序模型建立方法

doi:10.7527/S1000-6893.2015.0218

材料工程与机械制造

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基于虚拟控制面约束的机匣类零件工序模型建立方法

韩飞燕, 张定华, 张莹, 吴宝海

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

收稿日期:2015-07-10 修回日期:2015-08-02 出版日期:2015-10-15 发布日期:2015-08-04
通讯作者: 张定华, Tel.: 029-88493232-411 E-mail: dhzhang@nwpu.edu.cn E-mail:dhzhang@nwpu.edu.cn
作者简介:韩飞燕女, 博士研究生。主要研究方向: 复杂曲面的计算机辅助几何设计及多坐标数控加工理论。 E-mail: hanfeiyan@126.com;张定华男, 博士, 教授, 博士生导师。主要研究方向: 高速切削工艺、多坐标数控加工理论、叶片叶盘类零件的高效精密数控加工及无损检测。 Tel: 029-88493232-411 E-mail: dhzhang@nwpu.edu.cn;张莹女, 博士, 助理研究员。主要研究方向: 自由曲面多轴加工、智能加工。 E-mail: 47635964@qq.com;吴宝海男, 博士, 副教授, 硕士生导师。主要研究方向: 自由曲面多轴加工、智能加工。 E-mail: wubaohai@nwpu.edu.cn
基金资助:
国家“973”计划 (2013CB035802); 国家自然科学基金 (51305353)

A method of generate intermediate process models for casing parts based on virtual control surface constraints

HAN Feiyan, ZHANG Dinghua, ZHANG Ying, WU Baohai

The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi'an 710072

Received:2015-07-10 Revised:2015-08-02 Online:2015-10-15 Published:2015-08-04
Supported by:
National Basic Research Program of China (2013CB035802); National Natural Science Foundation of China (51305353)

摘要/Abstract

摘要：

在多岛屿特征机匣类零件的数控加工中,建立准确的加工工序模型是实现该类零件智能加工的关键技术。为了获得多岛屿特征机匣类零件准确的加工工序模型,提出了一种基于虚拟控制面约束的机匣类零件工序模型建立方法。首先,根据多岛屿特征机匣类零件的加工特征对建模过程中虚拟控制面约束的引入进行了分析,并结合虚拟控制面约束思想给出了拉格朗日超限插值的建模理论;然后,结合机匣类零件的几何特征确定了虚拟控制面的分布位置和几何形状的计算方法,在此基础上根据虚拟控制面建模理论构造了中间变形曲面,依据切削深度约束确定了工序模型,并对其进行了轨迹规划;最后,在一类多岛屿特征的机匣零件上对算法进行了验证,结果表明,本文方法能够根据机匣零件加工特征分布情况有效地控制工序模型的几何形状,避免了同时处理多个加工特征所导致的工序曲面过早趋于复杂现象,为多岛屿特征机匣类零件的数控加工提供有效的工序模型,一定程度上降低了该类零件数控加工的工艺规划难度。

关键词: 机匣类零件, 超限插值, 虚拟控制面, 工序模型, 工艺规划

Abstract:

In numerical control (NC) machining of a multi-island casing part, establishing accurate machining process model is a key technology to realize intelligent processing of such parts. In order to obtain accurate machining process model of a multi-island casing parts, a method based on virtual control surface constraints to structure process models of a casing part is proposed. Firstly, the introduction of virtual control surface constraints in modeling process is analyzed according to machining characteristics of the multi-island casing parts, and the Lagrange transfinite interpolation modeling theory is given by combining the idea of virtual control surface constraints. Then according to geometrical characteristics of the casing parts, the algorithm for calculating the distribution position and geometric shape of the virtual control surfaces is determined; on this basis, according to the modeling theory of virtual control surface to structure the middle surface, the process model according to cutting depth constraint and plan the tool path for it is determined. Finally, a validation is conducted on a multi-island casing part. The result shows that the proposed method is able to control the geometry of process model effectively according to the distribution of machining characteristics, avoid the geometry of process surface prematurely tending to be complicated caused by handling multiple processing characteristics simultaneously and provide some effective process models for multi-island casing parts in NC machining; to some extent, the difficulty of the process planning for a multi-island casing parts is reduced.

Key words: casing parts, transfinite interpolation, virtual control surface, process model, process planning

中图分类号:

V261

韩飞燕, 张定华, 张莹, 吴宝海. 基于虚拟控制面约束的机匣类零件工序模型建立方法[J]. 航空学报, 2015, 36(10): 3465-3474.

HAN Feiyan, ZHANG Dinghua, ZHANG Ying, WU Baohai. A method of generate intermediate process models for casing parts based on virtual control surface constraints[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(10): 3465-3474.

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E-mail：hkxb@buaa.edu.cn

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基于虚拟控制面约束的机匣类零件工序模型建立方法

A method of generate intermediate process models for casing parts based on virtual control surface constraints

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