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无缝钢管生产中用作轧管的斜轧机,目前有两种型式:一是阿塞尔轧机,这是一种三辊斜轧机,最近出现的德朗斯威尔轧机也属比类,后者可生产外径与壁厚比大于12的薄壁管材;二是狄塞尔轧机,这是一种以主动导盘为导板的二辊斜轧机,可生产外径与壁厚比达30以上的薄壁管材。它们都存在一个共同缺陷,就是在管材内表面有顺轧件旋转方向的螺旋道,实质是螺旋分布的壁厚不均。随着这类轧机生产规格范围向薄壁管方向扩大,和轧机送进角日益增加,这一缺陷也就愈来愈显著地影响管壁精度和一级品率。如某φ150三辊斜轧轧管机,在辗轧角为7°、送进角
There are two types of cross-rolling mills for seamless tube production in the production of tubes. One is the Assel rolling mill, which is a three-roller cross-rolling mill. The recent Delaware rolling mill is also a category, Can produce thin-walled pipe with an outer diameter to wall thickness ratio greater than 12; second is a Diesel rolling mill, which is a two-roller cross-rolling mill with an active guide plate as a guide, which can produce an outer diameter to wall thickness ratio of over 30 Thin-walled pipe. They all have a common flaw, that is, in the pipe surface along the rolling direction of rotation of the spiral, the spiral distribution of the actual wall thickness. As the range of production specifications for such rolling mills expands toward thin-walled tubes and the angle at which the mills are fed increases, this defect more and more significantly affects tube wall accuracy and first-grade yield. If a φ150 three-roll oblique rolling mill, rolling angle of 7 °, into the corner