Closing device for closing pressure fluid conveying channels in a housing

A Method of closing pressure fluid conveying channels in a housing by a closing member that is to be press fitted into a channel, of the closing member having an outside periphery including at least one indentation into which basic material of the housing is deformed during press fitting the closing member into the channel to provide a form lock,

• wherein the channel is configured as a stepped bore having an outside bore portion of large diameter that is remote from a pressure fluid side, the outside bore being followed by an inside bore portion of smaller diameter that is close to the pressure fluid side,
• wherein the closing member has two piston portions of diameters that respectively correspond to the diameters of the inside and outside bore portions, and the indentation provided between the piston portions is undercut relative to the inside bore portion, and the basic material is press fitted by plastic deformation into the indentation to provide the form lock, the method comprising:
• continuously measuring an amount of press-in force applied to the closing member using a force control arrangement;
• measuring a distance traveled by the closing member;
• and
• using the force control arrangement to adjust the amount of press-in force applied to the closing member as a function of the measured distance traveled.