鍍黑鎳剪力螺栓

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

Black nickel-plated shear bolts are specialized fasteners designed to provide both corrosion resistance and a controlled breaking point under specific torque or shear stress. Here’s a detailed description:

1. Material & Construction:

• 基底金屬： Typically made from high-strength steel or alloy to ensure durability.

• Plating: Coated with black nickel, a dark, matte or semi-gloss finish that offers:

  • 耐腐蝕性： Protects against rust and environmental damage.

  • 美學吸引力： Provides a sleek, non-reflective black finish.

  • Moderate Lubricity: Helps in tightening but is less slippery than zinc or chrome.

2. Shear Bolt Design:

• Purpose: Designed to 剪断 at a predetermined torque or load, acting as a mechanical fuse to protect machinery from overload damage.

• Weak Point: Often has a notched or reduced shank diameter to ensure controlled breaking.

• 鍍黑鎳剪力螺栓

• 常見應用： Used in agricultural equipment (e.g., rotary cutters, augers), automotive safety systems, and industrial machinery.

3. Key Features:

• Controlled Failure: Prevents costly damage by shearing before excessive force harms other components.

• 線路類型： May have fine or coarse threads depending on application (e.g., metric or SAE standards).

• 頭部風格： Hex head, flange head, or specialty heads for specific torque requirements.

4. Advantages of Black Nickel Plating:

• 增強耐用性： More wear-resistant than plain or zinc-plated bolts.

• Decorative Finish: Often used in visible applications where aesthetics matter.

• Better Adhesion: Paint or coatings adhere better than to bright nickel.

• 鍍黑鎳剪力螺栓

5. Common Uses:

• Agriculture: Shear bolts in PTO shafts, mower decks, and harvesters.

• 汽車： Safety-critical shear points in seat belts or drivetrains.

• 工業機械： Overload protection in conveyors or gearboxes.