China Fasteners Company successfully developed self-locking nuts and anti-loosening self-tightening bolts, breaking the monopoly of Hard Lock, Spiralock, and Nord Lock technologies
"Our core anti-loosening indexes of anti-loosening nuts and anti-loosening self-tightening bolts have surpassed first-class foreign products, but the cost is very low." On December 3, Hay Think learned from YZGY Fastener Technology Group that YZGY R&D team The invention of the "lock nut" broke the foreign technology monopoly and market monopoly.
"Anti-loosening nuts and anti-loosening self-tightening bolts are widely used in important occasions such as aerospace, high-speed railways, ships, offshore oil drilling platforms and military products, but thread anti-loosing technology is a long-existing industry problem. At present, the technology and The market has long been monopolized by foreign companies such as Hard Lock in Japan, Spiralock in the United States and Nord Lock in Sweden.
The research and development of "locknuts and self-tightening bolts" stems from the "demand bottleneck" of the enterprise. China's leading hot die forging machine tool technology group, the 4000 ton hot die forging produced by YZYL Group is a high-end product in machine tools, but due to large vibrations and large temperature differences, it often works continuously for 24 hours, and small screws have become a difficult problem to solve "It is often necessary to check and maintain to prevent the screws from loosening." In 2015, the YZGY R&D team began to develop lock nuts to help YZYL solve corporate problems.
anti-loosening nuts and anti-loosing self-tightening bolts model
"Although it looks like a small nut, it is really difficult to make locknuts that meet various conditions." According to Zhao Donghong, CTO of YZGY, the company lasted 5 years and tested more than 100 technical solutions. "Finally, we decided on the plan of using wedge nuts, floating wedge sleeves and special disc springs. "This plan was formed in 2019, and we have been experimenting and modifying since then. Finally, after nearly 2,000 experiments, the YZGY R&D team finally developed the "anti-loose nut and anti-loose self-tightening bolt".
"After the anti-loosening nut and anti-loosening self-tightening bolt were subjected to 7000 destructive vibration tests, the core anti-loosing index value still reached the excellent standard, while the number of vibrations tested by the international standard was only 1500." Shi Jin, one of the main team leaders The company told us that the project has obtained 7 invention patents and is applied on the 4000-ton hot die forging machine tool of YZYL Group. According to Nie Yuhai, a senior engineer of YZYL Group, "Currently, the anti-loosening nut has been used very well, exceeding expectations."