To provide a circular flange distortion amount measurement method and a circular flange distortion amount measurement apparatus for measuring the distortion amount of a circular flange without attaching neither devices nor members, etc. to the circular flange.
A circular flange distortion amount measurement apparatus includes: a laser measuring instrument 13 which is arranged in front of a circular flange 11 where a distortion is to be measured, emits a laser beam to be turned by a certain angle θ with respect to an axial center 17 from a specified position P so as to scan in a conical surface shape, irradiates a measurement surface 12 of the circular flange 11 with the laser beam, receives a reflection laser beam from the measurement surface 12, and then, measures a distance from the specified position P to the measurement surface 12; positioning means 15 for mounting the laser measuring instrument 13 so as to allow the axial center 17 of the laser measuring instrument 13 to be directed in a prescribed direction; and a calculation unit 19 which multiplies the value of the distance from the specified position P to the measurement surface 12, which is acquired from the laser measuring instrument 13, by cos θ so as to obtain distance data, calculates reference data with assumption that the measurement surface 12 is a perfect plane, based on the distance data, subtracts the reference data from the distance data, and calculates the distortion amount of the circular flange 11.
YAMADA NOBUO
| JP2008145156A | 2008-06-26 | |||
| JPH074910A | 1995-01-10 | |||
| JPH0238806A | 1990-02-08 | |||
| JP2009198241A | 2009-09-03 | |||
| JPS6416904A | 1989-01-20 | |||
| JPH10160455A | 1998-06-19 | |||
| JP2008145156A | 2008-06-26 | |||
| JPH074910A | 1995-01-10 | |||
| JPH0238806A | 1990-02-08 | |||
| JP2009198241A | 2009-09-03 | |||
| JPS6416904A | 1989-01-20 | |||
| JPH10160455A | 1998-06-19 |
Yoshihiro Kurita
Takayuki Imanaka
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