Title:
METHOD FOR RAPIDLY MEASURING ROLLER PASS MAJOR SEMI-AXIS OF THREE-ROLLER REDUCING MILL
Document Type and Number:
WIPO Patent Application WO/2021/239148
Kind Code:
A1
Abstract:
A method for rapidly measuring a roller pass major semi-axis of a three-roller reducing mill, the method comprising the following steps: selecting a corresponding value of the average diameter of an elliptical pass, a value (a) of a first major semi-axis and a value (b) 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 (X) of a first line segment according to an elliptic equation, the obtained value (a) of the first major semi-axis, and the obtained value (b) of the minor semi-axis; calculating a value (M) of a second major semi-axis according to the right-angle triangle theorem and the value (X) 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 (40) opposite the roller gap to obtain a second size value. The roller pass major semi-axis of the three-roller reducing mill is measured, and the outer diameter precision and the surface quality of a steel pipe are improved.
Inventors:
CAO HUA (CN)
HUANGFU YOULI (CN)
ZHANG HOUSHENG (CN)
WU JUN (CN)
XIE FAN (CN)
HUANGFU YOULI (CN)
ZHANG HOUSHENG (CN)
WU JUN (CN)
XIE FAN (CN)
Application Number:
PCT/CN2021/097510
Publication Date:
December 02, 2021
Filing Date:
May 31, 2021
Export Citation:
Assignee:
DAYE SPECIAL STEEL CO LTD (CN)
International Classes:
G01B5/12; B21B19/10; B21B37/16; B21B38/04
Foreign References:
| CN111664772A | 2020-09-15 | |||
| CN105363783A | 2016-03-02 | |||
| CN104613869A | 2015-05-13 | |||
| CN105363782A | 2016-03-02 | |||
| CN103234423A | 2013-08-07 | |||
| CN103047922A | 2013-04-17 | |||
| CN110961470A | 2020-04-07 | |||
| JP2000094008A | 2000-04-04 |
Other References:
See also references of EP 4092375A4
Attorney, Agent or Firm:
BEIJING WUZHOUYANGHE & PARTNERS (CN)
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