手术缝合线涂层工艺中张力自稳定系统的设计

为保持手术缝合线涂层工艺过程中丝线张力的稳定性，通过分析传统张力的控制方式及其局限性，提出了一种基于速度跟随原理的张力自稳定系统。该系统采用主动放线方式，从动力学角度建立放线系统张力控制模型，设计弹簧-张力杆机构。通过实时检测走线过程中张力的波动，改变主动放线速度，从而减小走线过程中丝线张力的波动幅度，提高系统稳定性。构建了虚拟样机，在ADAMS中进行动力学仿真，仿真结果表明该弹簧-张力杆机构能将张力的波动幅度减小70%。最终以与强生（中国）医疗器材有限公司共同研制的四头上蜡机作为测试对象，与传统设备相比，该方案可将张力的波动幅度减小53%。

Design of Tension Self-stabilization System for Surgical Suture Coating Processes

In the coating processes of surgical sutures, to stabilize the tension, a self-stable system was raised depending on the speed-following principles, and was aimed to solve the limitation of traditional tensions through analyzing the control mode. The tension-controlling system was designed on dynamics and feeds the suture actively. Meanwhile, a spring, served as a tension rod to change the feed speeds through testing the undulation of the tension in the processes, thereby, the undulation ranges might be decreased, in like manner, the stability was improved. With a virtual model, dynamics simulation may draw the spring through ADAMS. This tension rod mechanism may decrease the undulation ranges by 70%. Finally, a waxing machine was used as a test object which was developed with Johnson & Johnson medical(China) Ltd..Comparing with the traditional equipment, this one proves to decrease the undulation ranges by 53%.