| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic working method by which a plastic working for drawing the end part of a hollow cylindrical workpiece into a semispherical shape or the like and also forming a hole part in the top part of a drawn part of the formed workpiece is performed at high accuracy and high working efficiency. SOLUTION: In the plastic working method for drawing the end part of the workpiece W by attaching the hollow cylindrical workpiece W to a spindle 2, arranging stepped rollers R provided with a stepped part having a prescribed shape for drawing the end part of the workpiece W around the axial center of the spindle 2 and pressing the stepped parts of the stepped rollers R against the end part of the work piece W while rotating the workpiece W, by pressing the stepped parts of the stepped rollers R against the end part of the workpiece W in the state where a prescribed clearance C is provided between the tip face W1 of the workpiece W and a plane Lo joining the mutual corner parts of the stepped parts of the stepped rollers R, the end part of the workpiece W is drawn and also the hole part A is formed in the top part of the drawn part of the formed workpiece W. COPYRIGHT: (C)2008,JPO&INPIT
|
