Dear S.Mahuri,
For arc generation in arc welding two electrodes are necessary. Now take example of SMAW welding. Normally electrode is +ve electrode and the work piece is -ve electode.
When high ampere current is applied through electrode and when welder brings welding electrode very near to work piece the current try to flow from negative to positve. But there is gap of air. When the electorde is in close proximity of the work piece the air gap is minimised. Currnet try to flow & air making resistance to current flow and great amount of heat is generated at welding spot by making the air ionisation and ionised air gases now become conductive and passes the current from / to work piece to electorde. With generation of high temparature the electrode starts melting and welding progresses.
Nilesh Pathare,
TCR Engineering Services, Inspection Engineer.
On Wed, May 21, 2008 at 4:37 AM, Mahuri Snehkumar (TIPO - QA/QC) <S.Mahuri@panipat.ticb.com> wrote:
Dear all,
Can any one tell me in welding how arc is generated.
Regards,
Snehkumar L. Mahuri
QA/QC
EPCC 2A, PANIPAT
9215989508
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