Press brake control device, press brake control method, tool, and data structure of tool information

A press brake control device, comprising:

• a stroke calculation unit configured to calculate, when a sheet metal is sandwiched between a punch held by a punch holder and a die held by a die holder and the punch is moved toward the die to bend the sheet metal at a set bending angle, a stroke of the punch for bending the sheet metal at the bending angle in consideration of a spring back amount of the bent sheet metal;
• a bending load calculation unit configured to calculate a bending load required to bend the sheet metal at the bending angle;
• a punch deflection amount calculation unit configured to calculate a punch deflection amount that is a deflection amount of the punch according to the bending load;
• a punch holder deflection amount calculation unit configured to calculate a punch holder deflection amount that is a deflection amount of the punch holder according to the bending load;
• and
• a depth value calculation unit configured to calculate a depth value by adding at least the punch deflection amount and the punch holder deflection amount to the stroke, the depth value being a distance by which the punch is moved toward the die.