Weld-Dor (also spelt as Wel-Dor, Wel'Dor or Weldor) was the name given to three different robots from a team from Northern Ireland that fought across Robot Wars history, competing in Series 3, 4 and 6, plus the second series of Extreme. Weld-Dor had no huge deal of success, losing three times in the first round of several competitions, but was a seasoned competitor nonetheless, receiving a low seeding in Series 4. It was best known for representing Northern Ireland in The First World Championship.