| 摘要 |
<p>Production of a cooling channel piston comprises shaping a piston blank at least partly in a forging process. At least one peripheral collar and a recess (6) behind the collar are produced during the forging process. The collar is then reshaped so that the recess is closed by the collar to form the cooling channel. Preferred Features: The collar is reshaped by forging, swaging, driving through a hollow shape, and rolling pressure.</p> |
