Method for the production of piston-type accumulators

A method for producing a piston accumulator, comprising the steps of:

• mounting a piston in an accumulator housing for movement along a longitudinal axis of the housing with the piston separating an interior of the housing into two working chambers between first and second longitudinal ends of the housing;
• providing at least a first shoulder in the interior of the housing adjacent to but spaced from the first longitudinal end of the housing to form a first end portion of the housing with a reduced wall thickness relative to an adjacent portion of the housing, with a transition part between different wall thicknesses forming the first shoulder;
• inserting a first cover component at least partially within the housing through the first longitudinal end when open until an inner surface portion of the first cover component engages the first shoulder preventing further insertion of the first cover component;
• deforming the first end portion of the housing to form a bend between the first shoulder and the first longitudinal end through an acute angle relative to the longitudinal axis against an axially facing outer circumferential contact surface of the first cover component extending at a corresponding acute angle relative to the longitudinal axis and about an axially facing outer surface portion of the first cover component radially within the outer circumferential contact surface to secure the first cover component in the housing with the first cover component sealing the first longitudinal end of the housing closed by moving a first shaping tool only axially along the longitudinal axis, the first shaping tool being unitary without any relatively movable parts;
• and
• sealing the second longitudinal end of the housing closed.