公开(公告)号：US20230074692A1

公开(公告)日：2023-03-09

申请号：US17792496

申请日：2021-05-31

申请人： DAYE SPECIAL STEEL CO., LTD.

发明人： Hua CAO ,  Youli HUANGFU ,  Housheng ZHANG ,  Jun WU ,  Fan XIE

IPC分类号： G01B5/02 ,  G01B3/38 ,  G01B3/04

摘要： A method for rapidly measuring roller pass major semi-axis of three-roller reducing mill, the method comprising the following steps: selecting a corresponding value of the average diameter of an elliptical pass, a value of a first major semi-axis and a value of a minor semi-axis from a three-roller pass data table according to a rack station number of a special numerical control lathe; calculating a value of a first line segment according to an elliptic equation, the obtained value of the first major semi-axis, and the obtained value of the minor semi-axis; calculating a value of a second major semi-axis according to the right-angle triangle theorem and the value of the first line segment; measuring a first size value by attaching three claws of a three-claw internal micrometer to three roller gaps; or attaching one end of inner calipers to any roller gap, and attaching the other end to the bottom of a roller arc opposite the roller gap to obtain a second size value. The roller pass major semi-axis of the three-roller is reducing mill is measured, and the outer diameter precision and the surface quality of a steel pipe are improved.