| 摘要 |
An insert element comprising a carrier and an expandable material carried on the carrier, and a method for fitting said insert element into a conductive hollow body, the method comprising the following steps: the insert element is introduced into the hollow body; the insert element is positioned in the hollow body, the contact surface of the insert element coming into contact with the inner wall of the hollow body; a biasing current is applied between the insert element and the hollow body; the insert element and the hollow body are separated, forming an electric arc between the contact surface and the inner wall of the hollow body; a welding current is activated in order to form at least one melted mass on at least one side of the electric arc; the insert element and the hollow body are put together; and the insert element and the hollow body are connected by means of the melted mass located at least on one side.
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