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Recently, Dongguan Yisen Precision Hardware Spring Co., Ltd. has successfully completed mass production and delivery of a batch of 0.03mm ultra-precision spring assemblies. Custom-developed for core modules of high-end communications equipment, these products overcome industry pain points including difficult forming of micro springs, tight tolerance requirements and stringent operational stability standards through extreme process control, mature customized solutions and a reliable quality control system. The products fully meet the client’s specifications and have won high recognition, further consolidating the company’s technical advantages in customized ultra-precision hardware springs.
As 5G communications and smart terminals keep evolving toward miniaturization, lightweight design and higher precision, accuracy requirements for internal core structural components of communications equipment continue to rise. Compared with conventional springs, 0.03mm ultra-fine micro springs represent a highly challenging category in high-end precision hardware machining. They are widely adopted in communication RF modules, precision connection assemblies and micro sensing structures, directly affecting signal transmission stability, structural fitting accuracy and overall service life of communications devices. The communications equipment client in this project specializes in R&D and manufacturing of high-end communication terminal components, imposing extremely strict requirements on dimensional tolerance, elastic stability, fatigue resistance and consistency of matching springs — technical hurdles that many spring manufacturers struggle to overcome.
Three core technical challenges emerged at the initial stage of this customized project, which are also common pain points in micron-scale spring machining across the industry. First, forming is extremely difficult. The 0.03mm ultra-thin wire features low toughness and tricky hardness control. Conventional production equipment is prone to wire breakage, forming offset and uneven deformation, failing to maintain basic product geometry. Second, tolerance requirements are rigorous. The client specified overall dimensional tolerance within ±0.005mm, with flat burr-free end faces and uniform deformation. Minor deviations would cause poor fitting of equipment modules and impair communication signal transmission. Third, high operational stability is required. Operating under long-term high-frequency vibration and alternating temperature conditions, the micro springs must deliver outstanding fatigue resistance and corrosion resistance without slackening or failure, to guarantee stable long-term operation of equipment.
To address all technical difficulties of the project, Yisen Precision’s technical team quickly set up a dedicated task force. Drawing on years of experience in custom precision springs, the team developed tailor-made production and quality control schemes to break through technical barriers. For raw material selection, conventional wire was replaced with high-purity imported precision alloy wire. Pre-processing including wire softening and tension adjustment was carried out to improve wire toughness and forming stability, eliminating breakage and deformation at the source to accommodate ultra-fine 0.03mm forming. On the production equipment side, the company deployed high-precision CNC spring forming machines with customized production parameters for low-speed precision forming to avoid dimensional deviations caused by high-speed manufacturing.
For production process control, Yisen Precision established a refined full-process quality inspection system to safeguard product quality. Before mass production, first-article sampling and comprehensive testing were performed to verify dimensional accuracy, elastic coefficient and appearance. Mass production only commenced after samples fully satisfied client standards. During mass production, dedicated staff monitored equipment parameters and product forming status in real time. Samples from each batch underwent micron-level dimensional measurement, elastic fatigue testing and salt spray corrosion testing. Precision and performance of every product were strictly checked to ensure high consistency across the whole batch, solving the industry-wide issue of poor consistency in mass production of micro springs. Meanwhile, the technical team optimized spring force structure design according to the client’s equipment working conditions to enhance anti-fatigue and anti-deformation performance for long-term high-frequency operation of communications equipment.
After multiple rounds of sampling, commissioning, process optimization and strict quality inspection, all 0.03mm ultra-precision spring assemblies passed the client’s comprehensive acceptance check. All precision and performance indicators exceeded expectations, marking successful mass delivery. Post-delivery feedback from the client shows Yisen Precision’s custom ultra-precision springs perfectly fit assembly requirements of the equipment’s core modules, featuring tight fitting and reliable stability. The springs effectively improve operational accuracy and quality consistency of terminal equipment, providing strong component support for the client’s product iteration and upgrading.
The successful delivery of ultra-precision springs for this high-end communications project fully demonstrates Yisen Precision’s strong technical capability in micron-level custom springs, serving as solid proof of the company’s commitment to high-precision, high-difficulty custom hardware components. Moving forward, Dongguan Yisen Precision Hardware Spring Co., Ltd. will keep advancing precision hardware technology, continuously breaking technical barriers for micro and ultra-precision spring production, and optimizing customized service workflows. With stringent quality standards, mature solutions and efficient delivery capacity, the company will supply premium customized hardware springs and parts for high-end sectors including communications, medical treatment, smart wearables and precision electronics.