O processo de encabeçamento a frio é um dos novos processos para a maquinagem sob pressão com menos ou nenhum corte
metal. É um método de processamento que utiliza a deformação plástica do metal sob a ação de
forças externas e, com a ajuda de moldes, redistribui e transfere o volume de metal para formar
as peças ou os espaços em branco necessários. O processo de encabeçamento a frio é o mais adequado para a produção de
elementos de fixação, tais como cavilhas, parafusos, porcas, rebites, cavilhas, etc.
Black Galvanized Parafusos de cisalhamento are specialized fasteners designed for applications where security and corrosion resistance are critical. Here’s a detailed description:
1. Material & Coating:
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Material: Typically made from high-strength steel for durability.
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Coating: Galvanized (zinc-coated) to provide corrosion resistance, with an additional black finish (often black oxide or another black protective layer) for aesthetics and extra protection.
- Shear bolts black zinc plated
2. Shear Feature:
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Shear Head Design: The bolt head is designed to shear off (break away) once a specific torque is reached during installation, leaving a smooth, tamper-resistant surface.
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Security Purpose: Prevents removal once installed, making them ideal for permanent or high-security applications (e.g., public infrastructure, electrical panels, traffic signs).
3. Thread & Drive Type:
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Thread: Usually fully threaded for a strong grip.
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Tipo de acionamento: May feature a special drive (e.g., hexagonal socket, one-way, or proprietary) to deter tampering.
- Shear bolts black zinc plated
4. Common Uses:
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Construction & Infrastructure: Highway guardrails, bridges, and fencing.
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Electrical & Utility: Streetlight poles, transformer boxes.
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Security Applications: Vandal-proof fixtures, machinery, and public installations.
5. Advantages:
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Resistência à corrosão: Zinc coating + black finish enhances longevity in harsh environments.
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Tamper-Proof: Sheared head prevents disassembly.
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High Strength: Suitable for structural applications.
- Shear bolts black zinc plated
6. Sizes & Standards:
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Available in various diameters (e.g., 1/4″, 5/16″, 3/8″) and lengths.
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Complies with industry standards like ASTM, DIN, or ISO for shear bolts.
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