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Capacitor Discharge Welding Percussion Welding Magnetic Force (AC) Stud Welding

Capacitor Discharge Welding Percussion Welding Magnetic Force (AC) Stud Welding. Stud Welding. Learning Activities View Slides; Read Notes, Listen to lecture Do on-line workbook. Lesson Objectives When you finish this lesson you will understand: The three methods of stud welding

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Capacitor Discharge Welding Percussion Welding Magnetic Force (AC) Stud Welding

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  1. Capacitor Discharge Welding Percussion Welding Magnetic Force (AC) Stud Welding

  2. Stud Welding • Learning Activities • View Slides; • Read Notes, • Listen to lecture • Do on-line workbook • Lesson Objectives • When you finish this lesson you will understand: • The three methods of stud welding • Typical Applications of this process Keywords Stud Welding, Capacitor Discharge, Initial Contact Method, Initial Gap Method, Drawn Arc Method

  3. Variations of Capacitor Discharge Stud Welding Initial Contact Method Initial Gap Method Drawn Arc Method AWS Welding Handbook

  4. Initial Contact Method is used only with portable quipment, principally for welding mild steel studs. Equipment simplicity makes it ideal for welding mild steel insulation pins to galvanized duct work. Initial Gap Method is used with portable and fixed equipment for welding mild steel, stainless steel, and aluminum. Generally, it is superior to both the drawn arc and initial contact methods for welding dissimilar metals and aluminum. Inert gas is not needed for welding aluminum. Drawn Arc Method is ideally suited for high speed production applications involving automatic feed systems with either portable equipment or fixed position. Inert gas is required for aluminum. AWS Welding Handbook

  5. Typical Parameters For the Three Variations Peak Welding Currents Vary from 600 - 20,000 amps Drawn Arc has lower peak current - longer time AWS Welding Handbook

  6. AWS Welding Handbook

  7. AWS Welding Handbook

  8. Metals Handbook, ASM, 1983

  9. Flange Used for Drawn Arc. Slightly pointed to facilitate arc start Most often used, easily machined Used for critical applications and nonflanged Aluminum Metals Handbook, ASM, 1983

  10. AWS Welding Handbook

  11. Metals Handbook, ASM, 1983

  12. AWS Welding Handbook

  13. Spring Loaded Hand Gun Metals Handbook, ASM, 1983

  14. Gravity Drop Metals Handbook, ASM, 1983

  15. With Detergent Spray Without Detergent Spray Automated Initial Gap Machines often have a detergent spray between gap before welding to reduce weld spatter. Metals Handbook, ASM, 1983

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