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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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Presentation Transcript
slide1

Capacitor Discharge Welding

Percussion Welding

Magnetic Force (AC)

Stud Welding

slide2

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

slide3

Variations of Capacitor Discharge Stud Welding

Initial Contact Method

Initial Gap Method

Drawn Arc Method

AWS Welding Handbook

slide4

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

slide5

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

slide9

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

slide13

Spring Loaded Hand Gun

Metals Handbook, ASM, 1983

slide14

Gravity Drop

Metals Handbook, ASM, 1983

slide15

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