21.矫直机调整的主要工艺参数有哪些?斜辊矫直机调整的主要工艺参数有:(1)矫直速度的选择;(2)矫直辊倾斜角的选择;(3)矫直辊上下辊间距(压下量)的选择;(4)第二对辊座下辊位置的选择; 21. What are the main process parameters of straightening machine adjustment? The main process parameters for the adjustment of skew roll straightening machine are: (1) the choice of straightening speed, (2) the choice of straightening roll inclination angle, (3) straightening The choice of the distance between the upper and lower rolls of the roll (reduction); (4) the choice of the position of the lower roll of the second pair of rolls;