内衬层生产线中浮杆对胶片张力控制的研究

Study on tensility control of film by floating pole of the inner liner product line

针对轮胎内衬层生产线胶片在传送过程中的张力控制仅凭实际经验而无理论分析的现状,分析了轮胎内衬层生产线上胶片从接取运输带传送至冷却鼓的过程中,浮杆倾角实际值α2和浮杆倾角给定值α*2与冷却鼓运输速度vi+1和接取运输带的运输速度vi之间的关系,得出:当α2>α*2时,vi>vi+1;当α2<α*2时,vi<vi+1;当α2=α*时,vi=vi+1的浮杆实际值和给定值与冷却鼓运输速度和接取运输带运输速度的关系.利用悬链线理论和迭代算法求出胶片跨距为2m,高差为0.4m和0m,胶片厚度为6m m,浮杆臂长为0.3m,浮杆横向单位长度重力为0.02N/cm、0.2N c/m、1.0N/cm和2.0N/cm时,浮杆倾角与胶片中最大张力和平均张力的关系曲线.计算表明:胶片张力随浮杆倾角α2变化时有一极小值的特点,并给出了浮杆对胶片中张力控制的最佳控制点(张力最小点).

There is no theory analysis but only practice for tensility control of film in tire inner liner product line during transmission. Based on this present condition, the paper analyzed the relationships between the actual inclination of the floating pole （α2）, the given inclination of the floating pole （α^＊2） and the transmission speed of cooling drum （vi＋1）, the transmission speed of take-away roller （vi） in the tire inner liner product line when the film conveyed from the take-away roller to the cooling drum. The relations between the actual inclination of the floating pole, the given inclination of the floating pole and the trans- mission speed of cooling drum, the transmission speed of take-away roller,such as vi〉 vi＋1 as α2〉 α＊2, vi 〈vi＋1 as α2 〈α^＊2 , vi = vi＋1 as α2 = α^＊2,were illustrated. Using the catenary theory and iterative algorithm the relationship between the actual inclination of the floating pole and the maximum, average tensility in the film were obtained when the span of the film were 2 m, the elevation difference of the film at both ends were 0.4 m and 0 m, the thickness of the film were 6 mm, the arm of force of the floating pole were 0. 3 m, the crisscross weight of unit length were 0. 02 N/m and 0. 2 N/m and 1.0 N/m and 2. 0 N/m. The minimum tensility of the film, according to the inclination of the floating pole （α2）, was obtained, and it showed the optimal control point of film tensility control by the floating pole （the point of minimum tensility）.