| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain always normal fusion weld connection by removing an aging-like error generated in electro-fusion welding operation. SOLUTION: This electro-fusion welder supplies fusion weld energy En to an electro-fusion weld joint 1 having a heating wire 2 buried in a fusion weld part of a joint main body 6, and connecter pins 4, 4 connected to both ends of the heating wire 2 by connecting mechanically terminals to the connecter pins 4, 4. In this case, a means is provided wherein a current value determining the fusion weld energy En is classified into a plurality of steps (11, 12, 13...), and constant current control En =I<2> Rt (I=11, 12, 13...) by a plurality of constant current values is carried out.</p> |
