| 摘要 |
<p>The invention relates to a method for producing a rotationally symmetrical hollow metal part, particularly a shaft. According to said method, bar-shaped ductile solid material is provided, the solid material is heated from about 300°C below the forging temperature to the forging temperature, the solid material is transversally spline-rolled until weakenings are created in the core zone (3) of the solid material and the sold material is torn open. Two mandrels (5, 6) are guidingly introduced into the center of the bar-shaped solid material during the rolling process, and one mandrel is retracted while the second mandrel continues advancing so as to produce a tubular part. Also disclosed is a transversally spline-rolled rotationally symmetrical hollow part, especially a shaft, which is produced according to said method and can be embodied as a transmission shaft, camshaft, drive shaft, output shaft, starter shaft, hollow shaft, or a preform for molded parts and similar.</p> |
