宽厚板轧机的新型平面二包蜗杆副.pdfVIP

宽厚板轧机的新型平面二包蜗杆副 周良墉1 （湖南华菱集团湘潭钢铁有限公司，湘潭 411101 ） 摘 要 宽厚板轧机上的压下装置由于传递功率高、传动比大，进口轧机都是采用圆柱蜗杆传动。平面包络环面蜗 杆的承载能力大，传动效率高，成为轧机压下传动中的佼佼者。但由于其设计和制造的难度很大，在大型宽厚板轧 机上的应用还不是很多。除了制造过程复杂外，如何保证蜗杆副的啮合性能也是关键。湘钢 3800mm 宽厚板轧机的 压下装置中心距大、头数多，为保证性能，决定采用先进的曲率齿形平面二次包络蜗杆副。齿面形状决定蜗杆的性 能，曲率齿形是根据曲率修型原理提出的一种新型的环面蜗杆齿长方向的齿形，它是所有环面蜗杆的最佳齿形。在 开发中，应用了计算机优化和仿真技术、法向镶齿滚刀 CAD 技术和计算机辅助制造技术，最终实现了预期的目标。 关键词 宽厚板轧机 曲率齿形 平面二次包络 环面蜗杆副 New Type Plane Enveloping Toroid Worm for Wide Heavy Plate Mill Zhou Liangyong （Hunan Vanlin Xiangtan Iron Steel Co., Ltd., Xiangtan, 411101 ） Abstract ：Since its transmitting power is higher and the transmitting ratio is greater, the worm gear set is always adopted in the screw down system of Wide Heavy Plate Mill. The plane enveloping toroid worm is very good at power and efficiency. So it becomes the outstanding one in this field. But on count of its difficulty in design and manufacture, this kind of worm is used so little in heavy plate mill. Besides of this factor, how to keep its meshing quality nice is an essential problem. For the worm set in the screw down system of 3800 mm wide heavy plate mill of Xiangtan, its center distance is greater, threads are multitudinous. In order to raise its capacity, the advanced Curvature Profile will be applied on the worm. The surface determines the capability of the worm. According to the Curvature Modification Principle, the curvature profile is a new profile, and an optimum one, for toroid worm helicoids. In the process of manufacturing, such unprecedented techniques, as computer optimization and simulation, CAD for normal inlaying cutter hob, CAM, was applied. Fi