In the Zhoushan Islands on the coast of the East China Sea, a manufacturing company focusing on the "millimeter battle" is quietly rewriting the precision standards of Chinese electronic components. Recently, the fully automatic production line of crystal oscillator metal shells independently developed by Zhoushan Jinqiu Machinery Co., Ltd. was officially put into production. These button-like delicate metal cavities are about to protect the "time pulse" of billions of electronic devices around the world.
Small shell, big mission
Walking into the constant temperature workshop of Jinqiu Machinery, precision stamping equipment is "carving" crystal oscillator shells at a speed of 5 pieces per second. These metal parts with a diameter of less than 5mm may seem inconspicuous, but they are the core armor of quartz crystal resonators - they isolate dust and moisture, resist electromagnetic interference, and ensure the precise beats of mobile phone communications, car navigation, and aerospace instruments every second. "It's like building armor for the heart of the electronic world," said Li Ming, technical director, holding the silver-light-flowing shell. "Our error control reaches 0.001 mm, which is equivalent to one-seventieth of a hair."
Zhoushan solution to break the "bottleneck"
For a long time, the high-end crystal shell market has been monopolized by Japanese and German companies. Jinqiu Machinery spent three years to tackle the problem and innovatively developed the "five-dimensional precision molding process":
- Micro-carving stamping: original step-type hedging technology to eliminate metal stress deformation
- Molecular sealing: vacuum welding chamber achieves helium leakage rate <10⁻⁸ Pa·m³/s
- Intelligent cloud quality control: each batch of products generates a three-dimensional digital twin, which can be traced throughout the life cycle
"In the past, customers always worried about the sealing of domestic shells," said Chen Jing, sales director, showing the latest test report. "Now we have passed the ISO9001 quality system certification, and even European customers give us a thumbs up."
The temperature of green intelligent manufacturing
Unlike traditional electroplating processes, Jinqiu Machinery's nano alloy plating production line achieves zero wastewater discharge. The photovoltaic panels on the top of the workshop provide 30% clean energy for the production line, and all the scraps are recycled and melted into raw material bars. What makes the workers even more proud is that after the intelligent transformation, the craftsmanship of the old masters has been transformed into a digital process library, and young technicians can get real-time operation guidance through AR glasses. "The robotic arm completes repetitive labor, and humans focus on creating value." The summary of the factory director Zhang Weirong is full of philosophy.
"Zhoushan Core" connecting the world
At present, Jinqiu Machinery's monthly production capacity has exceeded 80 million pieces, and its products are used in high-end fields such as Huawei 5G base stations, Tesla vehicle systems, and SpaceX satellite payloads. With the completion of the second phase of the digital factory at the end of the year, this "hidden champion" production line will meet 15% of global demand. "We make not only metal shells," General Manager Li Qiuyuan looked at the cargo ships shipped abroad at the dock, "but also China's precision manufacturing ticket to the world."
