MEASURING APPARATUS FOR WELDED PIPE GEOMETRY

• Main Authors: MATSUFUJI YASUHIRO, TOKUHARA TETSUYA
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2018
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide an apparatus for measuring welded pipe geometry capable of measuring a shape dimension of a pipe end portion with reference to a position of a welded portion in the circumferential direction of the pipe end portion including a weld bead grinding part by accurately specifying a position of the welded portion.SOLUTION: In a geometry measurement apparatus 1, a calculation unit 14 specifies positions of weld bead non-ground portions 23a and 23b in the circumferential direction of a welded pipe to be measured S on the basis of position data of at least one of the outer peripheral surface and the inner peripheral surface of the welded pipe to be measured S including the weld bead non-ground portions 23a and 23b obtained from second displacement gauges 11a and 11b and rotation angle data of a measuring arm 7 obtained from a rotation angle detector 6. The calculation unit 14 calculates shape and dimensions of a pipe end portion 22 with reference to the position of the welded portion 21 on the basis of specified position data of the weld bead non-ground portions 23a and 23b of the welded pipe to be measured S and calculated shape dimension of the pipe end portion 22 with reference to a predetermined position at the pipe end portion 22 of the welded pipe to be measured S.SELECTED DRAWING: Figure 2 【課題】溶接ビード研削部を含む管端部の円周方向における溶接部の位置を正確に特定することで、当該溶接部の位置を基準とした管端部の形状寸法を測定することができる溶接管の形状寸法測定装置を提供する。【解決手段】形状寸法測定装置１において、演算部１４は、第２変位計１１ａ，１１ｂから得られる溶接ビード非研削部２３ａ，２３ｂを含む被測定溶接管Ｓの外周面及び内周面の少なくとも一方の位置データと、回転角度検出器６から得られる測定アーム７の回転角度データとに基づいて、被測定溶接管Ｓの円周方向における溶接ビード非研削部２３ａ，２３ｂの位置を特定する。また、演算部１４は、特定された被測定溶接管Ｓの溶接ビード非研削部２３ａ，２３ｂの位置データと、演算された被測定溶接管Ｓの管端部２２における所定位置を基準とした管端部２２の形状寸法とに基づいて、溶接部２１の位置を基準とした管端部２２の形状寸法を演算する。【選択図】図２