双路进线电脑袜机成圈机构的建模研究与运动仿真

Modeling and motion simulation of dual line computerized hosiery machine's knitting element

针对国内现有双路进线电脑袜机结构设计方法较传统,缺乏机构动力学分析和仿真研究,存在运动平稳性不高的问题,在对双路进线电脑袜机成圈机制和关键工艺点研究的基础上,分析了织针和三角瞬时受力状况,采用Solid Works三维建模技术创建了双路进线袜机成圈机构的三维模型,进行了机构动力学研究。运用ANSYS有限元分析技术,对主要成圈机件进行了运动模拟仿真,得到了织针位移、速度、加速度曲线,并根据仿真结果对成圈机件进行了设计优化。结果表明,在成圈编织0.19 s(转速为300 r/min)时,加速度最大值为0.75×102m/s2,此值比优化设计前有明显减小,提高了双路进线电脑袜机的运动平稳性。

The design methods of domestic dual input computerized hosiery machine was conventional. It was not only lack of appropriate analysis and simulation research for institutional dynamics, but also its stability needed to be improved. The instantaneous force status of needle and cams was analyzed based on the dual input computerized hosiery machine＇s knitting theory and key process points. 3-D model of knitting element was created with SolidWorks 3-D modeling technology, and then the research of mechanics dynamics was conducted. ANSYS finite-element analysis technology was employed to simulate the movement of main knitting element. The curve of needle＇s displacement, velocity and acceleration were acquired by the above analyses. According to the simulation parameters of needle＇s movement, the knitting element was optimized. The results reveal that acceleration reaches a maximum of 0.75 × 10^2 m/s^2 when knitting time is 0. 19 s. In comparison with the value before design optimization of knitting element, it reduces significantly, and the smoothness of dual input computerized hosiery machine improves.