| 摘要 |
<p>The method is for making a metal ring element within precise tolerances where an annular workpiece of metal plate is introduced between a ram and an external die. The workpiece is so pressed into the die by the ram that its outer diameter is reduced. One end of the workpiece lies against a stop which surrounds the inside of the outer die. The ram is driven axially within the annular workpiece and the outer die until it comes up against the other end of the workpiece and thus forms the workpiece into the desired annular element, which is determined by the shape of the ram and the outer die and stop. The workpiece, is pressed into the outer die until the one end comes into contact with a guide of the ram. This end obtains its final shape from the ram, when this is driven into the workpiece.</p> |
