This article discusses the mill products most often formed by the three-roll forming process. It schematically illustrates some of the shapes commonly produced from flat stock by the three-roll forming process. The article describes the two basic types of three-roll forming machines, namely, the pinch-roll type and the pyramid-roll type. It also lists the advantages of the pinch-roll machine, as compared to the pyramid-roll machine. The article analyzes the hot forming and cold forming processes for carbon or low alloy steel. It explains the procedure for forming truncated cones, bars, and bar sections by utilizing the pyramid-roll machine.
Three-Roll Forming, Metalworking: Sheet Forming, Vol 14B, ASM Handbook, Edited By S.L. Semiatin, ASM International, 2006, p 386–393, https://doi.org/10.31399/asm.hb.v14b.a0005125
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