地毯簇绒过程针梁受力测试与工艺分析

为分析地毯簇绒机主轴执行机构的受载情况,提出一种间接测试主轴系统末端执行机构受力的方法,完成主轴1转内针梁推杆的受力和不同主轴转速下针梁的受力测试。测试结果表明,随着主轴转速的提高,针梁推杆受到的冲击越加明显,针梁推杆受到的拉力随之变大,并且拉力的变化也趋于激烈,而针梁受到的最大压力随主轴转速变化不大。为此,提出在工艺上采用将喂纱时刻逐次提前、适当减小底布张紧程度的方法来改善主轴系统的受载情况。测试结果也为进一步计算分析主轴等效力矩提供实验依据。

Force measurement of needle bar in process of carpet tufting and related process analysis

In order to analyze the load distribution on the main shaft,a testing method is proposed to indirectly measure the resultant force acting upon the needle bar which is the terminal actuator of the main-shaft system in a carpet tufting machine.Most testing experiments are performed in the following cases: measuring forces upon the needle bar in a single period and forces in different revolutions. This study has shown that with the increase of the speed of the main shaft the impulse on the needle bar become obvious,and the pull force upon the bar increases and varies sharply,but the maximum press force varies insignificant.The process analysis has been carried on by using the experimental data,and then methods of gradually advancing the yarn feed time or properly decreasing the base fabric′s tension are proposed to improve the load distribution.The experiments above and the related process analysis will also provide technological basis for further analysis of the equivalent force moment on the main shaft.