| 摘要 |
An apparatus ( 10 ) and method for preheating welds uses a centered induction plate ( 12 ) having preferably a plurality of induction coils ( 30, 32 ) to impart the generation of heat in the materials to be welded ( 14 ), being interactively controlled by at least a temperature sensor ( 90, 92 ) and power supply control loop ( 16 ) so that even preheating can be obtained for a selected length of time given the parameters of the weld desired.
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