What is "cabbling"

Cabbling \Cab"bling\ (-bl[i^]ng), n. (Metal.) The process of breaking up the flat masses into which wrought iron is first hammered, in order that the pieces may be reheated and wrought into bar iron. [1913 Webster] ||

n. The process of breaking up the flat masses into which wrought iron is first hammered, so that the pieces can be reheated and wrought into bar iron.