基于布尔运算的球头铣刀瞬时切削厚度建模及分析
2019-06-19
作者：孙正坤1，2，冯丰3，周宏根1，2，戴磊1，2，李国超1，2
单位：1江苏科技大学；2江苏省船海机械先进制造及工艺重点实验室；3陕西柴油机重工有限公司
摘要：在五轴球头铣刀的铣削加工中，瞬时切削厚度模型的建立是准确预测切削力的关键步骤之一。目前大部分模型注重刀具和工件接触区域的建模，仅考虑了参与切削的刀刃切削厚度，而忽略了刀刃对工件的影响。本文提出一种基于布尔运算理论的瞬时切削厚度建模方法，从瞬时切削厚度的理论出发，考虑了所有刀刃对工件切削厚度的影响，并引入根据球刃曲线创建的辅助实体模型对瞬时切削厚度进行提取，并经铣削力试验验证了该模型的有效性。
关键词：五轴加工；瞬时切削厚度；球头铣刀；铣削力
中图分类号：TG54；TH161文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.06.009
Modeling and Analysis of Instantaneous Cutting Thickness of
Ball Head Milling Cutter Based on Boolean Operation
Sun Zhengkun，Feng Feng，Zhou Honggen，Dai Lei，Li Guochao
Abstract:The establishment of instantaneous cutting thickness model is one of the keys to accurately predict the cutting force in the fiveaxis milling of ball head cutters.At present，most models proposed by scholars pay more attention to the modeling of the contact area between the cutter and the workpiece.These models only consider the cutting thickness of the teeth currently involved in cutting，but ignore the influence of the teeth on the workpiece before cutting.This paper puts forward a kind of instantaneous cutting thickness based on the theory of Boolean operation modeling method which starts from the theory of instantaneous cutting thickness and considers the influence of all the teeth on cutting thickness.And the auxiliary entity model created by the tooth curve of the ballend cutter to extract the instantaneous cutting thickness is introduced.Finally，the validity of the model is verified by milling force experiments.
Keywords:fiveaxis machining；instantaneous cutting thickness；ballend milling cutter；milling forces