Smart Home & Car Horn

Tungsten contact is a key component in switch electrical appliances, used to achieve reliable connection and disconnection of circuits. Due to its high melting point (3422℃), high hardness, excellent arc erosion resistance, and low contact resistance, tungsten contacts are widely used in smart home relays, car horns, motorcycle horns, and other scenarios.

Tungsten contacts are mainly divided into two categories:
1. Pure Tungsten Contact: Made of high-purity tungsten (≥99.95%), it has extremely high-temperature resistance and wear resistance.
2. Brazed Tungsten Contact: Made of tungsten discs (tungsten slices or tungsten powder sheets) and rivet substrates (copper or iron) through a high-temperature brazing process.

According to the different materials of the rivet base, brazed tungsten contacts are divided into:
1. Copper Rivet Tungsten Contact: used for mid-to-high-end applications, such as smart home relays and car horns.
2. Iron Rivet Tungsten Contact: used for mid-to-low-end applications, such as motorcycle horns.

(1) Smart Home Relay
Smart home relays are the core control components of smart switches, smart sockets, smart lighting, and other systems, responsible for switching high-power circuits under low-voltage signal control. Due to frequent switching, relay contacts need to withstand high current shocks and arc erosion, so highly durable tungsten contacts must be used.

(2) Car Horns & Motorcycle Horns
Car and motorcycle horns are important components of vehicle safety systems. Their working principle is to drive the diaphragm through an electromagnet to produce sound. Since the current of the speaker is relatively large (10-30A) and it is frequently switched on and off, ordinary metal contacts are prone to ablation and failure, so high temperature and arc-resistant tungsten contacts must be used to ensure long-term stable operation.

1. Raw material selection: 99.95% high-purity tungsten rod/tungsten powder provided by Xiamen Tungsten Industry Group (the world's largest tungsten company) to ensure stable material performance.
2. Tungsten disc preparation:
Tungsten slicing: Precision cutting of pure tungsten rods, suitable for high-end applications (smart home relays, car horns).
Tungsten powder sheets: Tungsten powder pressing and sintering, suitable for economical products (motorcycle horns).
3. Rivet matrix preparation: Cold heading of copper/iron rivets to ensure dimensional accuracy and mechanical strength.
4. High-temperature brazing: Brazing in a tunnel furnace to firmly bond the tungsten disc to the rivet matrix to ensure conductivity and mechanical strength.
5. Surface treatment: Nickel plating to improve oxidation resistance and corrosion resistance.
6. Quality inspection:
- Conductivity test (contact resistance ≤ 10mΩ)
- Arc resistance test (≥ 100,000 switching life)
- Hardness test (HV ≥ 350)

To ensure the high reliability of tungsten contacts, we implement a strict quality management system:
(1). Raw material control: Deep cooperation with the Xiamen Tungsten Industry to ensure the purity of tungsten rods/tungsten powder ≥ 99.95%.
(2). Process optimization: Adopt automatic brazing technology to reduce human errors and improve welding consistency.
(3). Full process inspection:
Dimension inspection (optical measuring instrument)
Electrical performance test (contact resistance, arc resistance)
Durability test (simulating actual working environment)
(4). Traceability: Each batch of products has a complete production record to ensure that problems can be traced.

1. High-purity raw materials: Strategic cooperation with the Xiamen Tungsten Industry to ensure the quality of tungsten materials.
2. Advanced technology: Precision brazing + automated production to ensure product consistency.
3. Strict quality control: Full-process testing to ensure that each tungsten contact meets industry standards.
4. Customized service: Tungsten contact size, rivet material (copper/iron), and other parameters can be adjusted according to customer needs.