钢管管端内外径测量系统的设计与实现

Abstract

To realize automatic non-contact measurement for the inside diameter,outside diameter and the out-of-round of a steel pipe end,a measurement system for inside and outside diameters of the steel pipe was designed.Two laser optical triangulation sensors were used to perform full scans of the inside and outside diameters as they rotated around the pipe ends.Then a fitting algorithm was taken to reduce errors brought by the misalignment between rotary axis and steel pipe axis.Moreover,the distance between measured cross section and pipe end was adjusted by motorized translation stages fixed on the sensor,the aligning height of pipe center was adjusted by a lifter and the measurable pipe diameter was controlled with a two-aim translation stage,so that the measurement of steel pipes with different specifications could be implemented by the non-contacted method.Experimental results indi-cate that the measurement accuracy of the system is less than 0.05mm;repeatability limit is less than or equal to 5μm.When 500points are sampled per pipe end,the measurement process lasts less than 25s.which can fully meet the requirements of seamless steel pipe production enterprises.With advantages of high precision,easy operation and rapid speed,the system has passed the off-line test in Tian Guan Yuan Tong pipe products Co.,Ltd.,Tianjin.