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ROLLING METHOD OF PERFORATED SKELPS ON ASSEL ROLLING EQUIPMENT
ROLLING METHOD OF PERFORATED SKELPS ON ASSEL ROLLING EQUIPMENT
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机译：ASSEL轧制设备上的穿孔跳板的轧制方法
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摘要
The method is for the reduction of the OD and the wall thickness by rolling a cylindrical hollow block, which with its front part is inserted in a roller mechanism. In the run-in direction, in front of the roller mechanism a device is provided for reduction of the dia. and/or the wall thickness of the rear end part of the hollow block positioned on a mandrel bar. The pre-reduction roller reduces the hollow block end and is adjustable against the hollow block and can be guided away from it.The pre-reduction roller is adjusted slowly and continuously against the hollow block and with such a positioning speed that the axial path (LNEL) for the effect of the pre-reduction roller measured from the contact point of the roller on the hollow block surface as far as the hollow block end amounts to:- LNEL = 0.8 .. 2.0 DH and LNEL = 1.0 ..1.25 DH whereby DH is the OD of the hollow block before entry into the roller mechanism.
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