插铣工艺刀具失效机理分析
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摘要
为研究插铣过程中刀具的失效机理,建立了插铣刀具三维有限元仿真模型。以铝合金和钛合金为对象,对插铣过程中刀具的受力、温度和应力情况进行仿真和对比,分析刀具的失效机理,预测刀具的失效形式和失效区域,开展插铣试验验证刀具底刃是失效的高发区域,发现插铣铝合金刀具产生轻微涂层剥落、插铣钛合金底刃崩刃较多和局部区域被磨平等现象。针对不同工件材料的插铣加工,在刀具材料、几何参数、涂层选择以及冷却润滑等方面提出相应的建议措施,以降低刀具磨损和提高刀具耐用度。
In order to study the failure mechanism of the tool during the plunge milling process,a three-dimensional finite element simulation model of the plunge milling tool is established.The aluminum alloy and titanium alloy are used as the object to study the force,temperature and stress of the tool during the plunge milling process.Simulation and comparison,analyzing the failure mechanism of the tool,predicting the failure mode and failure area of the tool,and carrying out the plunge milling experiment,verifying that the tool bottom edge is the high-incidence area of the failure,and found that the insert milling aluminum tool produces a slight coating peeling,inserting The bottom edge of the milled titanium alloy has more chipping and localized areas are equalized.For the plunge milling of different workpiece materials,corresponding measures are proposed in terms of tool materials,geometric parameters,coating selection and cooling lubrication.The tool wear is reduced and the tool durability is increased.
In order to study the failure mechanism of the tool during the plunge milling process,a three-dimensional finite element simulation model of the plunge milling tool is established.The aluminum alloy and titanium alloy are used as the object to study the force,temperature and stress of the tool during the plunge milling process.Simulation and comparison,analyzing the failure mechanism of the tool,predicting the failure mode and failure area of the tool,and carrying out the plunge milling experiment,verifying that the tool bottom edge is the high-incidence area of the failure,and found that the insert milling aluminum tool produces a slight coating peeling,inserting The bottom edge of the milled titanium alloy has more chipping and localized areas are equalized.For the plunge milling of different workpiece materials,corresponding measures are proposed in terms of tool materials,geometric parameters,coating selection and cooling lubrication.The tool wear is reduced and the tool durability is increased.
引文
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[2]刘焕领.插铣过程刀具磨损检测技术研究[D].天津:天津大学,2007.
[3]李郁,田卫军,任学军,等.低温冷却GH4169高温合金插铣刀具磨损试验研究[J].现代制造工程,2017(8):87-92.
[4]冯之敬.机械制造工程原理[M].北京:清华大学出版社,2007.
[5]胡希川.硬质合金成型刀具刃磨加工失效分析[J].工具技术,2009,43(10):76-78.
[6]薛青萍.浅析高速钢刀具的失效[J].科学之友,2006(8):7-8.
[7]郭杰,徐看,刘利国,等.刀具涂层技术现状与发展趋势[J].工具技术,2014,48(3):3-7.
[8]李俊涛.切削刀具PVD涂层材料的研究进展[J].工具技术,2015,49(7):11-14.
[9]张啸尘.刃口钝化对涂层刀具切削性能的影响研究[D].贵州:贵州大学,2016.
[10]桂育鹏.可转位刀片刃口钝化机及钝化参数的推荐[J].机电产品市场,2005(9):66-67.
[11]陈明,安庆龙,刘志强.高速切削技术基础与应用[M].上海:上海科学技术出版社,2012:84-85.
[12]汤安民,张瑞平,王忠民,等.最大主应力与形状改变比能对断裂的影响[J].西安理工大学学报,1999,15(3):59-63.