注塑机拉杆螺纹的应力集中问题设计研究

Study on Design of Pull-rod Screw with Stress Concentration of Injection Machine

在AutoCAD图形环境中建立了注塑机拉杆的立体模型 ,通过stl格式转换为研究螺纹应力集中问题的有限元模型。讨论了不同牙形角拉杆螺纹的应力分布情况 ,发现齿形对拉杆螺纹牙根处的应力集中影响很大。设计了一种应力集中系数较小的牙形 ,前倾角为 3 0° ,后倾角为

The solid model of injection pull rod was established based on AutoCAD graphic studio,and the FEM model of stress concentration was then obtained by means of stl format conversion. The stress distribution of different pull rod screw was studied and a screw,which had low stress concentration coefficient,was designed,with a front dip angle of 30° and back dip angle of 0°。