Press

A press comprising:

• two crossheads spaced some distance apart one from another;
• uprights adapted to interconnect said crossheads;
• said crossheads and uprights forming a frame of said press;
• a first ram mounted for translatory movement between said crossheads and along said uprights;
• a nut with a non-self-stopping thread carried in said first ram;
• a second ram mounted for translatory movement between said crossheads and along said uprights;
• a die holder rotatably mounted in said second ram for translatory motion therewith and for rotation relative thereto;
• a screw rigidly connected to said die holder and operatively connected with said nut thereby forming therewith a kinematic couple;
• drive means including a main hydraulic cylinder for translatory motion of said die holder jointly with said second ram;
• auxiliary drive means including at least one auxiliary hydraulic cylinder for translatory motion of said first ram and said nut, said main hydraulic cylinder including a movable rod connected to said first ram;
• a pressurized fluid source;
• pressure line means adapted to communicate said main hydraulic cylinder and said at least one auxiliary hydraulic cylinder with said pressurized fluid source;
• said at least one auxiliary hydraulic cylinder being controlled from said main hydraulic cylinder for translatory motion of said die holder;
• said first and second rams being initially in spaced relationship with a clearance formed therebetween of sufficient size to permit a specified angle of rotation of said die holder during translatory motion of said first ram relative to said second ram.