Study on improving the winding forming uniformity of high-speed silk reeling machine with large package

Abstract

In silk reeling machine, traverse mechanism is the actuator to wind the silk yarn and form a silk package. However, the current traverse mechanisms are poor in forming uniformity: they are difficult to realize winding with constant speed in axial direction for a long time, and guarantee constant forming angle and winding tension in circumferential direction. In order to improve the winding forming uniformity of silk reeling machine, a new traverse mechanism which consists of an axial forming system and a circumferential forming control system is constructed. The feature of axial forming system is that it’s driven by non-circular gear pair with free pitch curve. Through establishing axial ideal kinematic model of traverse rod and axial theoretical kinematic model of traverse rod, the pitch curve of non-circular gear pair is solved in reverse by using stepwise search method. In circumferential forming control system, the traverse rod, controlled by STM32, will move in radial direction with increase of package thickness. Based on tension analysis and wrapping angle analysis, the radial kinematic model of traverse rod is deduced by using stepwise search method as well. Finally, the silk winding experiment verifies that the new traverse mechanism can effectively improve the winding forming uniformity.

Keywords

• traverse mechanism
• silk package
• forming uniformity
• non-circular gear
• free pitch curve
• stepwise search method