GH536高温合金试验研究及切削用量优化

Experimental Study and Cutting Optimization of GH536 Superalloy

薄壁支撑环属于航空发动机燃烧室典型的薄壁环形件,但其零件结构刚性差,加工过程中极易变形。为更好地减少零件的加工变形,本文以铣削力为研究对象,采用单因素和正交试验相结合的方法,研究切削用量与切削力的影响规律,建立能有效预测GH536高温合金切削力的经验数学模型。并采用遗传算法,以切削力Fx最小为优化指标,通过MATLAB软件计算获取最优切削用量组合。实验结果表明:优化后的各项参数可有效减小薄壁支撑环加工过程中的切削力,进而减少零件变形量。

Thin-walled support rings belong to the typical thin-walled annular parts of aero-engine combustion chambers, but the structural rigidity of their parts is poor, and they are very easy to be deformed during the machining process.In order to better reduce the machining deformation of the parts, this paper takes the milling force as the research object, adopts a combination of single-factor and orthogonal tests to study the influence law of cutting dosage and cutting force, and establishes an empirical mathematical model to effectively predict the cutting force of GH536.And the genetic algorithm is used to obtain the best combination of cutting dosage by MATLAB calculation with the minimum cutting force F_(x) as the optimization index.The experimental results show that the optimized parameters effectively reduce the cutting forces during the machining of thin-walled support rings, and then reduce the deformation of the parts.