عملية الرأس على البارد هي واحدة من العمليات الجديدة للتشغيل الآلي بالضغط ذات القطع الأقل أو بدون قطع
المعدن. وهي طريقة معالجة تستخدم التشوه البلاستيكي للمعدن تحت تأثير
قوى خارجية، وبمساعدة القوالب، تقوم بإعادة توزيع ونقل حجم المعدن لتشكيل
الأجزاء أو الفراغات المطلوبة. عملية الخراطة على البارد هي الأكثر ملاءمة لإنتاج الأجزاء القياسية
أدوات التثبيت مثل البراغي والبراغي والصواميل والمسامير والمسامير والدبابيس وغيرها
1. Definition & Primary Function
A Chicago Screws with tooth is a specialized variant of Chicago fastener featuring:
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Serrated flange teeth (typically 8-16 teeth)
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Two-piece threaded assembly (male screw + female barrel)
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Permanent-lock design that bites into materials when tightened
Primarily used for vibration-proof fastening in high-stress applications where standard Chicago screws might loosen.
2. Key Components
A. Male Component
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Slotted or hex drive head
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Machine threads (usually #10-24 or 1/4″-20)
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Hardened steel construction
B. Female Barrel
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Toothed flange (teeth angle: 30-45°)
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Internal matching threads
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Barrel length options: 1/4″ to 1″
3. Unique Features
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Self-locking teeth: Cut into material surface when torqued
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Anti-rotation design: Prevents barrel spinning
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Material-gripping capability: Works with:
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Leather (8oz+ recommended)
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Wood (hardwoods preferred)
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Plastic (ABS, polycarbonate)
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Composite materials
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6. Industrial Applications
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Motorcycle/ATV components (vibration-prone areas)
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Industrial equipment panels
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Heavy-duty leather goods (saddles, tactical gear)
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Outdoor signage (wind-resistant mounting)
7. Installation Guide
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Drill pilot hole (match barrel diameter)
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Press barrel teeth into material surface
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Thread screw until teeth fully engage
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Final torque: 1/8 turn past firm resistance
8. Removal Considerations
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Requires destructive extraction in most cases
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May leave permanent tooth marks
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Replacement barrels often needed
9. Industry Standards
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ASME B18.6.4 (dimensional compliance)
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MIL-F-18866 (military binding barrels)
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ASTM F468 (nonferrous fasteners)
10. Purchasing Specifications
When ordering, specify:
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Thread size (e.g., #10-24)
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Barrel length
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Tooth configuration
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Material grade
Chicago Screws with tooth provide superior holding power for critical applications where vibration-induced loosening cannot be tolerated. Their semi-permanent nature makes them ideal for final assembly situations.
المراجعات
لا توجد مراجعات بعد.