Method and apparatus for forming a steel pressure container, such steel pressure container and a preform therefor

摘要

The invention relates to a method for forming a steel container having a curled open end, comprising the steps of i) providing a steel cup; ii) deep drawing the steel cup into a drawn container preform; iii) thin drawing the body of the drawn container preform; and iv) curling an open end of the drawn container preform by forming a precurl and by curling the precurl into an elongated curl, to an apparatus for forming a steel container, and to such steel container and its preform.