Ti-6Al-4V螺旋铣孔切屑力模型综述

A Review of Cutting Force Models for Ti–6Al–4V Helical Milling

钛合金螺旋铣孔在飞机制造中已经得到越来越广泛的应用,然而切屑力作为体现刀具与工件相互作用本质的重要物理量之一,却因螺旋铣偏心加工的特殊方式难以准确预测。以试验为基础的传统经验模型效率低、适用性差,已经不能满足实际工况切屑力预测的需求。随着数值计算方法及有限元技术不断发展,基于金属切削理论构建切屑力模型体现出优势,成为螺旋铣孔切屑力研究的焦点之一。在阐述二维切削理论的基础上,分析了解析模型的独特优势;重点围绕有限元模型与热力耦合模型两个方面,概述钛合金螺旋铣孔切屑力模型的发展现状及趋势。

Widespread applications of titanium alloy material in helical milling have been significantly increasing in the aircraft manufacturing process.As one of the most important physical quantity,the cutting force can reflect the essence of interaction between tool and workpiece.However,it is difficult to predict the cutting force accurately due to the special eccentric machining method of helical drilling.The traditional experience model based on experiment has low efficiency and poor applicability,which can’t meet the demand of cutting force prediction in actual working condition.With the development of numerical calculation method and finite element technique,the modeling of cutting force based on metal cutting theory has reflected many advantages and became one of the focuses of the research on the cutting force of holemaking by helical milling.In this paper,the unique advantages of analytical model are analyzed based on the illustration of two-dimensional cutting theory,and the development status and trend of cutting force model for helical milling of titanium alloy are summarized,focusing both on the finite element model and the thermo-mechanical coupling model.