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三辊行星式轧机的发展,是由于用低投资轧制圆棒(半成品或成品)这一轧机概念而引起的。这种轧机仅配备有三个连续动作的轧辊,在一道次中可获得和八机架连续轧机(如连续式钢坯轧机或在一般线材和条钢轧机面前的荒轧机)相同的延伸量。这种新轧制方法的特点是在单一道次中产生高压缩量,而且三辊行星式轧机具有连续过程,它仅靠轧制作用来压缩工件的横断面。它连续动作,因而仅包括等速旋转的部件。
The development of the three-roller planetary mill is due to the concept of rolling mills with a low investment in round rods (semi-finished or finished). This mill is equipped with only three rollers that operate continuously, achieving the same extension in one pass as an eight-stand continuous mill, such as a continuous billet mill or a bar-mill in the face of normal wire and bar mills. This new rolling method features high compression in a single pass, and the three-roll planetary mill has a continuous process that compresses the cross-section of the workpiece by rolling only. It operates continuously and therefore includes only parts that rotate at constant speed.