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
1. Fundamental Definition
A carbon steel slotted Chicago screws is a specialized two-part mechanical fastener consisting of:
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A male-threaded post with a slotted drive head
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A female-threaded barrel with an integrated flange
These fasteners create secure, flush-mounted joints in applications requiring repeated assembly/disassembly while maintaining structural integrity.
2. Material Specifications
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Base Material: Low-to-medium carbon steel (typically 1008-1035 grades)
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Surface Treatments:
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Zinc plating (most common corrosion protection)
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Black oxide (for tooling and industrial applications)
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Nickel plating (enhanced wear resistance)
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Untreated (for temporary assemblies or painting)
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4. Mechanical Properties
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Tensile Strength: 45,000-70,000 psi (depending on carbon content)
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Shear Strength: Approximately 60% of tensile strength
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Torque Capacity: 5-25 in-lbs (0.56-2.82 Nm) for standard sizes
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Temperature Range: -20°F to +250°F (-29°C to +121°C) untreated
5. Functional Advantages
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抗震性: Thread-locking action prevents self-loosening
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Material Versatility: Compatible with:
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Serviceability: Allows non-destructive disassembly
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Aesthetic Finish: Provides clean, professional appearance
7. Specialized Variants
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Security Versions: Require custom driver bits
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Shoulder Screws: Unthreaded midsections for rotational applications
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O-Ring Equipped: Integrated sealing for waterproof joints
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Knurled Barrel: Tool-free hand tightening models
8. Installation Protocol
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Hole Preparation:
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Drill clearance hole (0.005″-0.010″ larger than barrel OD)
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Countersink if required (typically 82° for flat heads)
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Assembly Process:
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Insert barrel from reverse side
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Thread post through primary material
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Carbon Steel Slotted Chicago Screws
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10. Industry Applications
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Transportation: Aircraft interior panels, automotive trim
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Defense: Body armor assembly, weapon accessories
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Retail: Display fixture construction
11. Cost Analysis
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Unit Cost: $0.15-$2.50 depending on:
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Volume (breaks at 1,000+ units)
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Plating requirements
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Precision tolerances
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