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刀片和刀杆连接是高性能刀具制造的重要技术之一,螺钉夹紧是常见和重要的一种方式。本研究通过分析可转位车刀螺钉夹紧方式的结构和受力状况,结合数学-物理模型,提出了一种计算螺钉变形量的数学模型,该数学模型比以前模型计算精度高,采用Marc有限元软件对螺钉模型的变形量进行了仿真,仿真时螺钉预紧力选择范围为4 500~5 500 N,结果显示:利用本文提出的模型得到的螺钉变形量误差在17%以内,而传统模型的误差可达276%,侧面应证了采用此模型计算可转位车刀螺钉夹紧中螺钉变形量是基本可行的,可以为螺钉夹紧机构设计及螺钉夹紧数控车刀切削应用提供参考。
Blade and arbor connection is one of the important technologies for high-performance tool making. Screw clamping is a common and important way. In this paper, by analyzing the structure and stress conditions of screwdriving tool of indexable turning lathe, a mathematical model for calculating the amount of screw deformation is put forward based on mathematical-physical model. The mathematical model is more accurate than the previous model. Finite element software was used to simulate the deformation of the screw model. The selection range of screw pre-stress was 4 500 ~ 5 500 N during the simulation. The results show that the error of the screw deformation obtained by this model is less than 17% The error of the model is up to 276%. It should be verified that the model can be used to calculate the amount of deformation of the screw in the indexable lathe screw clamping. It can be provided for screw clamping mechanism design and screw clamping CNC lathe cutting application reference.