Electrical Fixed Contacts
Products Description
Electrical Fixed Contacts are fixed electrical contact elements that play the following key roles in electrical systems:
Providing a stable, low-contact-resistance conductive interface
Serving as a fixed mating end for moving contacts or conductive components
Maintaining structural stability over the long term, without participating in mechanical movement
Maintaining consistent performance under repeated switching and current surges
Unlike resilient or moving contacts, static contacts place greater emphasis on structural strength, surface quality, and material durability, making them particularly suitable for applications with extremely high reliability and lifespan requirements.
Core Production Process Analysis
Raw Material Pretreatment
The substrate undergoes precision cutting, surface degreasing, and pickling passivation to remove oxide layers, oil stains, and impurities, ensuring surface cleanliness and laying the foundation for subsequent forming and plating processes. Simultaneously, stress relief treatment is performed on the substrate to prevent deformation caused by stress release during processing, ensuring the flatness of the head.
01
Precision Forming Process
Utilizing integrated CNC stamping and milling technology, the head dimensions and flatness are precisely controlled. Dedicated positioning fixtures are used during forming to prevent head misalignment and deformation. For complex contact structures, powder metallurgy forming technology is employed to achieve uniform material density distribution, improving the overall mechanical properties and conductivity stability of the Silver Electrical Contacts.
02
Contact Surface Finishing
After forming, the contact surface is polished using a high-precision surface grinder, with real-time laser flatness detection for calibration, ensuring that the flatness and roughness of the Static Silver Contact surface meet standards. Polishing, cleaning, and drying are performed to remove surface grinding impurities, preventing any impact on contact performance and plating quality.
03
Surface Treatment Process
Utilizing high-precision surface treatment technologies such as vacuum sputtering and electroplating, the coating thickness and uniformity are precisely controlled. During the coating process, precise control of current and temperature enhances the adhesion between the coating and the substrate, preventing coating peeling and flaking during long-term use. Passivation and sealing are performed after treatment to strengthen corrosion resistance.
04
Full-Process Testing
Equipped with professional equipment such as contact resistance testers, flatness testers, tensile testing machines, and arc resistance test chambers, each batch of Flat Silver Contacts undergoes testing for contact performance, dimensional accuracy, coating adhesion, and arc resistance. Non-destructive testing techniques are used to identify internal structural defects, ensuring a 100% product qualification rate and excellent performance consistency between batches.
05
Key Technological Breakthroughs and Highlights
High-Precision Control Technology for Flat-Top Contact Surfaces
Integrating laser positioning, automated grinding, and real-time detection and calibration systems, this technology controls the flatness error of the contact surface to an industry-leading level. State Contact Rivet resistance stability is improved by more than 30% compared to traditional products, preventing equipment failures caused by poor contact.
Enhanced Coating Adhesion Technology
Through substrate surface activation treatment and optimized coating process parameters, this technology solves the problem of easy coating peeling in traditional coatings. Coating adhesion, as tested in tensile tests, reaches 1.5 times the industry standard, making Flat Silver Contacts suitable for harsh working conditions involving frequent vibration and impact.
Automated Integrated Production Technology
A fully automated production line is built, achieving integrated operations from molding, grinding, surface treatment, to inspection. This reduces manual intervention, improves production efficiency, and ensures batch consistency in Flat Bimetallic Rivet size and performance, meeting the needs of large-scale batch orders.
Application Advantages: Deep Adaptability to Multiple Scenarios
Molded Case Circuit Breakers (MCCBs)
In MCCBs, the stationary contacts typically carry enormous short-circuit currents. Our flat-head stationary contacts, combined with a large arc-extinguishing chamber, effectively control the arc, prevent phase-to-phase short circuits, and improve the circuit breaker's ultimate short-circuit breaking capacity (Icu).
Miniature Circuit Breakers (MCBs)
For MCBs used in residential or similar applications, space is limited. Our products feature high-precision dimensional control, perfectly fitting the confined internal space of MCBs, ensuring sensitive thermal and electromagnetic tripping.
New Energy Contactors
In PDUs (Power Distribution Units) or charging stations for electric vehicles, contactors operate frequently. The low contact resistance of Cold Forming Metals effectively reduces energy consumption, extends driving range, and their anti-welding properties ensure safe disconnection of high-voltage circuits.
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