screw rolling

Based on discussion of the screw hoist with moving screw pair and the screw hoist with rolling screw pait, a new type of ball screw hoist is introduced in the paper.

讨论了滑动螺旋副和滚动螺旋副螺杆式启闭机的特点及不足，介绍了一种新型滚珠螺杆式启闭机。

Using self-boring grouted rock external screw bolt to build geotechnical anchor, is the key technique by which resolve the difficulty of the construction in complex geologic circumstances. And external screw steel tube rolling is the key equipment to manufacture finish rolling external screw steel tube.

使用自钻注浆式外螺纹锚杆进行岩土锚固施工，是解决复杂地质条件施工难题的关键技术，而外螺纹钢管轧机则是生产精轧外螺纹钢管的关键设备。

Computer Aided Design of Screw Rolling Drum of Coal Mining Machine

采煤机螺旋滚筒的力学分析与设计

The paper puts forward a new method of three-roller mill producing steel tube with cold screw rolling, investigates its figuration in theory, oversees its implement in practice The technology application will benefits a lot of enterprises

提出了采用冷斜轧方法生产冷轧钢管的新工艺，对其理论成型的特点进行了研究，对实践该新工艺进行了探讨。冷斜轧技术的应用将会给企业带来好的经济效益

Study on the Thread Profile of Self-tapping Screw and the Design of Round Thread Rolling Die

自攻螺钉用螺纹牙型及圆滚模设计探讨