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

Abstract

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

CLC Number:

V261

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

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