Electrode extension
Easiest to measure is the contact tip distance from the joint surface, A
rule of thumb says that a normal distance is 10-15 x diameter of the electrode. Too small
stick-out increases the risk of burn-back, where the arc will weld the electrode together
with the contact tip. Too long a distance to the workpiece will increase the risk for stub-
bing, especially at the start.
The contact tip-to-work distance also has an influence on the current and penetration
profile. If the electrode extension is increased the current and heat input decreases while
the amount of deposited metal remains. This reduces the penetration, and if it was unin-
tentional a risk for lack of fusion appears. A good rule is therefore to keep the wire
out constant during the welding operation.
Supplied By RIHUI Ceramic Welding Backing
Date: 2023-04-10 hits: 674 Return
Spot welding ( Ceramic Backing) 2023-04-10
Ultrasonic welding( RIHUI Backing) 2023-04-10
Spot welding( RIHUI Ceramic Welding Backing) 2023-04-10