WORKING METHOD AND WORKING DEVICE FOR WORKPIECE

PROBLEM TO BE SOLVED: To provide a method for reducing the cost of a plurality of times of drawing work and ironing work, and forming a deep cylindrical shape container by one time of drawing work.SOLUTION: A process for reducing a thickness of a material of a flange part F between an opening side end surface 2a of a die 2 and a collar 3 by compressing the flange part F of a workpiece by the collar, and a process for pressurizing the material on an outer side than the flange part F to a direction for pushing in between the opening side end surface 2a of the die 2 and the collar 3 are alternately performed or performed in parallel together with a push-in process of the workpiece to the die 2 by a punch 4. Thus, the material extended by reducing the thickness of the flange part F is made to flow into the die 2 and the material on the outer side of the flange part F is made to newly flow into the flange part F at the same time, and a deeper container can be formed compared to the drawing process constant in the thickness.