capacitor discharge welding percussion welding magnetic force (ac) stud welding
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Capacitor Discharge Welding
Percussion WeldingMagnetic Force (AC)
Stud Welding
Stud Welding
Lesson ObjectivesWhen you finish this lesson you will understand:• The three methods of stud welding• Typical Applications of this process
Learning Activities1. View Slides; 2. Read Notes, 3. Listen to lecture4. Do on-line
workbook
KeywordsStud Welding, Capacitor Discharge, Initial Contact Method, Initial Gap Method, Drawn Arc Method
Variations of Capacitor Discharge Stud Welding
Initial Contact Method
Initial Gap Method
Drawn Arc Method
AWS Welding Handbook
Initial Contact Methodis 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 Methodis 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 Methodis 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
TypicalParameters For the ThreeVariations
AWS Welding Handbook
Peak Welding CurrentsVary from 600 - 20,000 amps
Drawn Arc has lowerpeak current - longer time
AWS Welding Handbook
AWS Welding Handbook
Metals Handbook, ASM, 1983
Metals Handbook, ASM, 1983
Most oftenused, easilymachined
Used for criticalapplications andnonflanged Aluminum
Used for DrawnArc. Slightly pointedto facilitate arc start
Flange
AWS Welding Handbook
Metals Handbook, ASM, 1983
AWS Welding Handbook
Metals Handbook, ASM, 1983Spring Loaded Hand Gun
Metals Handbook, ASM, 1983
Gravity Drop
Metals Handbook, ASM, 1983
With Detergent Spray Without Detergent Spray
Automated Initial Gap Machines often have a detergent spraybetween gap before welding to reduce weld spatter.