复杂薄壁构件自适应加工工艺几何模型重构

doi:10.7527/S1000-6893.2021.24820

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复杂薄壁构件自适应加工工艺几何模型重构

冯亚洲¹, 任军学², 刘战锋¹, 韩晓兰¹

1. 西安石油大学机械工程学院, 西安 710065;
2. 西北工业大学机电学院, 西安 710072

收稿日期:2020-09-30 修回日期:2020-10-28 发布日期:2021-04-29
通讯作者: 冯亚洲 E-mail:asian5921@126.com
基金资助:
航空发动机及燃气轮机重大专项基础研究项目（VII-0001-0141）；航空发动机高性能制造工信部重点实验室开放课题（HPM-2020-03）

Model construction of complex thin-wall structure parts for adaptive machining

FENG Yazhou¹, REN Junxue², LIU Zhanfeng¹, HAN Xiaolan¹

1. School of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China;
2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2020-09-30 Revised:2020-10-28 Published:2021-04-29
Supported by:
Major Basic Research Programs on Aero-Engine and Gas Turbine (VII-0001-0141); Open Project Fund of Key Laboratory of Aeroengine High Performance Manufacturing of Ministry of Industry and Information Technology (HPM-2020-03)

摘要/Abstract

摘要： 随着制造理念和制造水平的不断提高，大量复合制造工艺背景下的近净成形叶片被应用到现役或在研的航空发动机中。该类叶片是典型的复杂薄壁结构零件，无精确定位基准，且成形一致性差。采用传统叶身定位，加工后的前/后缘、榫齿形状和位置精度均难以保证，从而导致产品一致性差，易超差与合格率低。针对以上问题，提出一种面向自适应加工的复杂薄壁结构零件工艺几何模型重构方法。首先，建立复杂曲面的采样点分布模型，快速获取叶片精确成型区域的位置和形状；其次，提出基于特征曲线相似变形的模型重构算法，精确重构前/后缘非精确成型区域的工艺几何模型；最后，通过精锻叶片自适应加工试验进行验证。试验结果表明：该方法可有效满足以精锻叶片为代表的复杂薄壁构件自适应加工要求。

关键词: 自适应加工, 数字化测量, 模型重构, 精锻叶片, 前/后缘

Abstract: With continuous improvement of manufacturing concepts and levels, a large number of near-net-shape blades produced by multi-manufacturing technologies have been applied to in-service or in-development aero-engine. However, by the reason of typical complex thin-walled structure parts, no accurate positioning datum and poor forming consistency of the precision forging blade, the machined leading edge and trailing edge, blade tenon shape and the positional accuracy are generally difficult to be guaranteed using the pressure and suction surfaces with variant shapes as the positioning references, which leads to poor consistency, low pass rate, and easy out-of-tolerance of final productions. In order to solve the above problems, a model construction method of complex thin-wall structure parts for adaptive machining is proposed. Firstly, a distribution model of sampling points on complex surface is established to quickly obtain the position and shape of the precision forged blade. Secondly, a model reconstruction algorithm is proposed based on the similar deformation of the characteristic curve, in order to reconstruct the geometry model of the inexact molding area at the leading edge and trailing edge. Finally, this approach is verified by adaptive machining of precision forged blade. The results show that this method can effectively meet the requirements of the adaptive machining of complex thin-wall structure parts represented by precision forged blades.

Key words: adaptive machining, digital measurement, model construction, precision forged blade, leading/trailing edge

中图分类号:

V261

冯亚洲, 任军学, 刘战锋, 韩晓兰. 复杂薄壁构件自适应加工工艺几何模型重构[J]. 航空学报, 2021, 42(10): 524820-524820.

FENG Yazhou, REN Junxue, LIU Zhanfeng, HAN Xiaolan. Model construction of complex thin-wall structure parts for adaptive machining[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(10): 524820-524820.

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复杂薄壁构件自适应加工工艺几何模型重构

Model construction of complex thin-wall structure parts for adaptive machining

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