| 摘要 |
PURPOSE: A press die for regulating lubricating oil supply for improving the moldability of a sheet is provided to block the supply of lubricating oil in the initial stage of forming a sheet blank and start supplying lubricating oil after the middle forming stage when a frictional force is generated, thereby simultaneously controlling a blank holding force and a frictional force. CONSTITUTION: A press die for regulating lubricating oil supply for improving the moldability of a sheet comprises a die upper surface lubricating hole(102) and a die wall lubricating hole. The die upper surface lubricating hole includes a plurality of fine holes punched on the upper side of the die in order to supply lubricating oil between a sheet blank and the upper side of the die. The die wall lubricating hole includes a plurality of fine holes punched on a wall of the die in order to supply lubricating oil between the sheet blank and the wall of the die. |
