Trimetal Round Copper Electrical Contact Rivet
Products Description
In industrial control relays, changeover switches, and similar components that rely on switching functions, the moving contact is typically required to travel back and forth between two fixed contacts. The conventional approach has been to use a contact, which inevitably leads to inefficient use of precious metals. By applying our proprietary cold‑heading composite process, we have achieved high‑volume production of the Trimetal Round Copper Electrical Contact Rivet. In this design, both the head and the tail are made of a silver alloy, while the central body consists of copper. This asymmetrical three‑layer configuration is precisely tailored to the electrical demands of switching contacts, and it cuts material costs by 30% to 65% compared to solid silver alternatives.
Core Selling Points
Asymmetrical Three-Compound Design
The head and feet are made of a silver alloy, which guarantees high conductivity and robust arc resistance, while the middle section is copper to provide excellent thermal conductivity and structural strength. This configuration follows the classic Three Compound Rivet design philosophy and is specifically optimized for applications involving bidirectional switching.
Replacing solid silver contacts reduces costs by 30-65%
Tri Metal Contact Rivets use silver alloy only in areas where arc breaking is truly required, replacing the rest with copper, significantly optimizing material costs.
One of the few domestic factories mastering this technology
This manufacturing process presents significant technical difficulties, particularly in maintaining uniform silver layer thickness and consistent bond strength at both ends of the contact. To overcome this, we utilize proprietary multi-station cold heading equipment, which guarantees the reliable high-volume production of AgCuAg Composite Rivet Contacts.
Product Details and Features
Three-layer precise composite structure
Featuring a high-conductivity copper substrate positioned between high-purity silver alloy layers at the head and feet, the AgCuAg Composite Rivet Contacts achieve a fully metallurgically bonded three‑layer structure. This design eliminates internal gaps and prevents delamination under operational stress.
One-stop SolutionPrecise dimensional control
The head diameter and rod diameter tolerances are controlled within ±0.02mm, allowing for precise assembly of relays. Trimetal Rivets achieve maximum installation accuracy and contact consistency.
Standardized Silver Layer Control
Three Compound Contacts' silver layer thickness is precisely matched to customer needs, down to a minimum of 0.05mm, and the adhesion between the silver layer and the substrate is ≥100MPa, eliminating the problem of silver layer peeling off during use.
Surface Process Optimization
The silver layer surface finish Ra≤0.4μm reduces arc erosion points, and the copper substrate undergoes anti-oxidation treatment, improving storage and usage reliability.
Manufacturing Process
| Simultaneous Feeding of Three Wires | Silver alloy wire, copper wire, and silver alloy wire are fed into the mold according to predetermined lengths and sequences. |
| One-Step Cold Forging | Within a closed mold cavity, a huge impact force causes the three metals to simultaneously plastically flow and form a metallurgical bond, creating Three Compound Contacts. |
| Step-by-Step Shaping | The head and foot shapes of the Trimetal Composite Rivet Terminals are refined separately. |
| Ultrasonic Cleaning and Drying | Removes oil and dirt, ensuring the surface cleanliness of the Trimetal Rivets. |
| Optical full inspection | 100% inspection of head and foot dimensions and surface defects to ensure consistency of every Tri Metal Contact Rivet. |
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If you are looking for a technologically mature and cost-effective Trimetal Round Copper Electrical Contact Rivet, or require customized metal parts for your entire relay series, please contact us for free samples and customized technical solutions.
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