Rotary piercing mill. A piercing mill (Mannesmann mill) is used to turn a round piece of metal into a seamless thick-walled tube. The ingot is first preheated to approximately 1250 degrees Celsius and then it is fed between two specially-shaped rotating rolls. The mandrel between the rolls causes the ingot to hollow | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 3600 px × 2381 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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