利用冷镦螺栓生产线生产双头螺柱新工艺

介绍了利用现有的冷锹螺栓生产线生产双头螺栓的新工艺，提出了双头搓丝的新概念。

Research on the mechanical property test of a new high-strength metal bolt

In order to study how to improve the overall performance of the operational metal bolt, based on the production process of an ordinary metal bolt used in understructure engineering, this paper focused on the existing problems of ordinary metal bolts identified by some survey and analysis. The results show that the structure of operational metal bolts is so unrea- sonable that the bolt tail is easily fractured by low load capacity. Furthermore, a new type of strong big-end metal bolt and its heat treatment and roughing processing technology were introduced. Through bolt tensile and metallographic tests, the property of the new big-end bolt was analyzed. The new findings indicate that after a special processing, the overall strength and plasticity of the bolt is greatly improved, and the grain of the bolt tail structure is refined, which would help build up favorable working conditions for bolt tails.

杭州民企擒“大鳄”

就因为同样生产一个小小的螺栓，杭州一家民营企业，被一个具有50多年历史、拥有24家子公司的德资跨国“大鳄”认定“专利侵权”。在强大的“专利打压”下，这家中资公司不得不同样擎起“专利”大旗，以20项具有自主知识产权的专利，反诉对方诽谤及不正当竞争。