To meet the requirement of high speed and presicion in straightening a steel tube or bar, a two roll straightener must be in full contact with the steel tube of bar when they are straightened.

• 摘要为满足高速、高精度地矫直棒、管材的要求，二棍矫直机在矫直棒、管材时，棒、管材与矫直辊应全部接触。