The invention concerns a method and a coiler mandrel for coiling metal strip, wherein the coiler mandrel comprises a mandrel body, a plurality of radially expandable segments arranged around the mandrel body, and a plurality of hydraulic cylinders by which the segments can be moved in the radial direction. The frame comprises a housing open at a front and a rear to form a central passageway. This makes it possible to secure a larger volume of the fillet portion of the underfill, thereby helping improve the function of preventing the rising up of the excess underfill by providing a shelf in the semiconductor chip. Workflows and associated interfaces may be received from a variety of sources and integrated into the workflow framework for enhancing data analysis. A control unit in communication with the drive motor may be connected to a remote controller or an onboard manual controller. An electric motor coupled to the housing and the source for electric power.