文献类型：期刊文献

中文题名：曲轴车-车拉加工系统刀夹寿命分析研究

英文题名：Research on the Tool Holder Life of Turn-turn Broaching Cutting System

作者：徐友钱[1];何云[1];陈龙[1];桂松[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2014

卷号：31

期号：3

起止页码：173

中文期刊名：硬质合金

外文期刊名：Cemented Carbides

收录：CSTPCD

基金：国家重大科技专项"高档数控机床与基础制造装备";编号(2012ZX04003041)

语种：中文

中文关键词：单元切削刀夹;Ansys有限元;刀夹寿命;刀夹侧壁厚度

外文关键词：turn-turn broaching cutting unit tool holder; ansys finite element; tool holder life; tool holder sidewallthickness

摘要：一个完整的切削加工系统不仅仅包括切削刀片,还包括机床与刀具连接系统。车-车拉是目前曲轴加工主要加工工艺,其刀具系统包括刀片与刀夹,而车-车单元切削刀夹往往由于侧壁容易在交变载荷的作用下引起疲劳断裂而失效。本文围绕刀夹寿命的影响因素为研究对象,通过金属材料的疲劳寿命与应力的数学关系式,测得实际切削时刀夹所受的切削力,应用三维造型软件建立刀夹模型,然后利用ANSYS有限元加载切削力,模拟仿真实际切削过程中刀夹侧壁所受到的应力随侧壁厚度的变化情况,最后利用MATLAB拟合建立刀夹寿命与侧壁厚度的关系式。鉴于实际加工中刀夹侧壁厚度与切削刃有效切削长度的关系,为了平衡切削效率与刀夹寿命之间的矛盾,因此选择最佳的刀夹侧壁厚度为3～3.5 mm。
A complete cutting system not only includes the cutting blade, but also includes tool connection system. Turn-turn broaching cutting is the main crankshaft machining process, and its tool system includes blade and tool holder. This paper focuses on the factors affecting the life of the too] holder. By using the mathematical relationship between the fatigue life and stress of metallic materials, the actual cutting force of the tool holder was measured. By using 3D modeling software tool holder model was established, and ANSYS finite element was utilized to load cutting force to simulate the realistic tool holder sidewall stress force conditions with sidewall thickness variation when it is in the actual cutting process. Finally MATLAB was used for fitting to establish the tool holder life relationship with the sidewall thickness. In consideration of the relationship between tool holder sidewall thickness and effective cutting length of the cutting edge in the actual cutting, to balance the conflict between the life of the cutting efficiency and tool holder sidewall thickness, the best tool holder thickness for 3-3.5 mm is choosen.