| 摘要 |
PROBLEM TO BE SOLVED: To provide a resistance welded tube manufacturing device in which the voltage generated between terminals of a work coil is dropped even when a large high frequency power is applied to the work coil by reducing the reactance between the terminals of the work coil. SOLUTION: The voltage generated between terminals of a work coil can be suppressed to a low level even when a large power is applied to the work coil by reducing the reactance between the terminals of a coil group using the work coil comprising the coil group in which a plurality of coils 21 formed by bending a copper square pipe in a circle are arranged along the common axis, both end parts of each coil 21 are respectively welded to two terminal plates 23, 23, and a plurality of coils 21 are continuously connected to each other.
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