초록 ▼

A system for the automatic adjustment of the pressure pad holding force in accordance with the thickness of the workpiece and the forming tool stroke includes a force transducer and a displacement transducer. The force transducer is used to monitor the force between the pressure pad and the workpiec

A system for the automatic adjustment of the pressure pad holding force in accordance with the thickness of the workpiece and the forming tool stroke includes a force transducer and a displacement transducer. The force transducer is used to monitor the force between the pressure pad and the workpiece. The output of the displacement transducer is continually read as the part is being formed. The workpiece thickness and forming tool stroke are used to calculate the optimum holding force. The pressure of a fluid system is adjusted to change the holding force to the optimum value.

대표청구항 ▼

A method of optimizing the holding force on the pressure pad of a press in accordance with the formed dimension of a part and in accordance with the thickness of a workpiece to be formed into said part by said press, said press having a forming tool and a die which cooperate to form said part, a for

A method of optimizing the holding force on the pressure pad of a press in accordance with the formed dimension of a part and in accordance with the thickness of a workpiece to be formed into said part by said press, said press having a forming tool and a die which cooperate to form said part, a force transducer and a displacement transducer comprising the steps of: applying an initial holding force to said pressure pad and continuously monitoring said holding force with said force transducer; providing the thickness of said workpiece from said displacement transducer and also providing a correlation of optimum holding forces for a variety of workpiece thicknesses; moving said forming tool to form said workpiece into said part while monitoring said force transducer and said displacement transducer; and calculating said optimum holding force in accordance with said workpiece thickness and the output of said displacement transducer; and adjusting said holding force to one of said optimum forces.