Method, Apparatus and Program for Determining Construction Data of the Deep-Drawing Tool Geometry by Means of Hybrid Springback Compensation

A method for determining design data for producing a forming die provided for reshaping components, comprising:

• carrying out, using an electronic computing device, a first simulation, comprising:
• moving die parts of a die toward each other to a closed position,
• reshaping a workpiece from an initial state to a first deformed state due to the moving of the die parts to the closed position,
• keeping the die parts at least temporarily in the closed position to maintain the workpiece in the first deformed state,
• moving the die parts away from each other to an open position, and
• deforming the workpiece to a second deformed state from the first deformed state due to internal stresses of the workpiece and due to moving of the die parts to the open position;
• calculating, using the electronic computing device, a stress state that characterizes the internal stresses of the workpiece while in the first deformed state, wherein
• the deformation of the workpiece in the second deformed state is based on an inversion of the stress state;
• determining, using the electronic computing device, a geometry of a new die part that influences the reshaping;
• and
• carrying out, using the electronic computing device, a second simulation comprising:
• reshaping the workpiece using the new die part having the geometry from an initial state to a third deformed state,
• comparing the third deformed state with a target state,
• calculating a vector field that characterizes a difference between the third deformed state and the target state, and
• calculating the design data as a function of the geometry and an inversion of the vector field.