Button Bimetal Rivet Electrical Contact
Products Description
Compared to solid silver contacts, Button Bimetal Rivet Electrical Contacts employ a functional layered design concept.
During operation, the area truly involved in current conduction and arc bearing is limited to the contact head, while the supporting portion primarily handles mechanical connection and current transmission. Therefore, the combination of a silver alloy working layer and a copper substrate improves material utilization while ensuring key performance characteristics.
Its basic structure includes:
Silver alloy contact layer
Copper substrate
Precision composite bonding interface
Riveted mounting structure
This design allows precious metal materials to be concentrated in critical working areas, thereby improving product economy and engineering adaptability.
Manufacturing Process: Precision Refinement of Atomic-Level Solid-Phase Diffusion and Micron-Level Cold Forging
| High-Energy Ultrasonic Cleaning and Surface Activation | Absolute surface purity is a prerequisite for silver-copper bonding. Before bonding, we employ multiple ultrasonic and micro-etching processes to remove the oxide film on the copper surface and organic residues on the silver surface, exposing a highly active metal lattice, laying the foundation for subsequent atomic-level bonding. |
| Precision Multi-Station Cold Forging Composite Forming | Using a high-rigidity multi-station cold forging machine, the silver and copper wires undergo rigorous plastic extrusion within the mold cavity. The powerful hydrostatic pressure forces the pure surfaces of silver and copper to break through the atomic spacing, resulting in dislocation pile-up and grain intercalation, instantly forming a mechanically integrated body with extremely high interfacial shear strength. |
| Continuous Atmosphere-Protected Diffusion Annealing | This is the soul of the Composite Contact Rivets for Relay process. After cold heading, the composite rivets undergo precise diffusion annealing under a hydrogen-nitrogen protective atmosphere. Through strict temperature and time control, interdiffusion occurs at the silver-copper interface, forming a genuine metallurgical bonding zone. |
| Non-destructive screening of silver layer thickness | A high-precision X-ray fluorescence thickness gauge is used to perform 100% online scanning of the silver layer, ensuring that the thickness variation of the silver layer in each batch is controlled within the micrometer level. This prevents early copper exposure and burnout due to an insufficiently thin silver layer, or unnecessary cost waste due to an excessively thick silver layer. |
Detailed Showcase – A Quality Inspection Perspective from Engineering Procurement
Silver Layer Thickness Uniformity
Whether the silver alloy layer thickness is within the rated range and whether it is evenly distributed around the entire circumference of the rivet head determines the Silver Bimetal Rivet Contact's lifespan and the reliability of the contact surface quality after riveting.
01
Copper Foot Appearance and Dimensional Tolerances
The smoothness and roundness of the feet directly affect the smooth operation of the feeding mechanism and the perpendicularity and alignment of the riveting posture.
02
Silver Layer Coverage and Offset Control
The silver layer coverage on the rivet head must be complete, and the metal substrate must not be exposed. Any offset will expose the substrate in the electrical contact area, directly leading to uncontrollable high contact resistance.
03
Silver-copper interface bonding strength
In destructive testing, lateral shear force or axial tensile force is applied to the Bimetal Electric Rivet Contacts to determine the critical force value for silver layer separation or interface detachment, ensuring that occasional detachment issues will not occur in large-volume supply.
04
Surface cleanliness and rust prevention protection
All Electrical Contact Points for Switches undergo degreasing, cleaning, and drying before leaving the factory, and are packaged in vacuum-sealed plastic bags for moisture protection, with internal desiccant and outer cardboard box protection to ensure that surface oxidation or corrosion does not occur during long-term sea transport and humid storage.
05
Core Functions and Multi-Application Evolution: Bridging Frequent Dynamic Switching and Steady-State Static Contact
Industrial Control Contactors and Relays (Dynamic/Static Contacts)
In motor starting and factory automation control circuits, contacts need to withstand high-frequency closing impacts and spark arcs. Our composite contact maintains an extremely low material transfer rate, extending the overall lifespan of control components.
Automotive Electrical and Smart Cockpit Relays (Dynamic Contacts)
Automotive DC systems (especially high-voltage fast charging and battery management systems) have extremely high requirements for transient surge currents. The Electric Power's anti-arc welding properties effectively prevent contact adhesion, protecting vehicle driving safety.
Smart Home Thermostats and Precision Switches (Static Contacts)
Used in home appliances, snap-action thermostats, and high-end wall switches. Extremely sensitive to minute fluctuations in resistance, our products can provide stable current flow with "zero noise and zero temperature rise" for tens of thousands of cycles.
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If your Bimetal Silver Electrical Rivet requires matching specific current ratings, lifespan requirements, or automated assembly solutions, our engineering team can provide technical support throughout the entire process, from material selection and structural design to mass production, helping your products achieve reliable mass production faster.
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