三辊轧管的几个工艺问题

SOME TECHNOLOGY ASPECTS IN THREE ROLL PIPE ROLLING

对三辊轧管的有关工艺问题进行了介绍。文章认为:正确选择产品品种和规格能充分发挥三辊轧管的特长;三辊轧管与三辊穿孔相匹配,可避免三辊轧管工艺自身造成的内折等表面缺陷,但不能避免管坯质量不良而造成的缺陷;采用三转角轧制法轧制厚壁管和相反的操作法轧制薄壁管可消除喇叭口与尾三角。

Some technology aspects in three-roll pipe roiling are described. The advantages of the threeroll rolling can be fully used if varieties and sizes of products are in proper ranges, Some surface defects such as inside wrinkle caused by the three-roll rolling process itself except for the defects caused by low quality raw materials can be avoid if a three-roll mill is matched with a three-roll piercer. The end trumpet and end triangle can be eliminated if a rolling process with three angles rotating is used for thick wall pipe rolling and other processes for thin wall pipe rolling.