航空发动机薄壁环形件装夹布局优化分析

薄壁环形结构广泛应用于航空发动机零件,大径厚比的薄壁环形工件在装夹、加工过程中极易产生变形,导致零件质量一致性差。以带周向特征的薄壁环形件作为研究对象,主要从装夹方案和装夹布局方面分析变形机理。通过建立有限元分析模型,对不同装夹布局下工件的变形情况进行预测,实现薄壁环形件装夹布局的最优化。最后,通过切削试验,验证了优化后的装夹布局对薄壁环形工件加工质量的提升效果。上下端面平行度和内外环同心度有效控制在0.02 mm以内,所提出的薄壁环形件装夹布局设计方案可以在各类薄壁环形件加工中应用。

Analysis of clamping layout optimization of aeroengine thin-walled circular parts

Thin-walled circular structure are widely used in aeroengine parts,the thin-walled circular parts with large diameter-thickness ratio are easily deformed during clamping and machining,resulting in low quality consistency.In this paper,the deformation mechanism of thin-walled circular parts with features is analyzed mainly from the aspects of clamping method and clamping layout.By establishing finite element model,the deformation of parts under different clamping layout is predicted,and the optimization of clamping layout of thin-walled circular parts is realized.Finally,through the cutting test,the improvement effect of the optimization clamping layout on the machining quality of thin-walled circular parts is verified,he parallelism of the upper and lower end faces and the concentric degree of the inner and outer rings are effectively controlled within 0.02 mm,and the proposed clamping layout design scheme can be applied to the processing of various thin-walled circular parts.