MEASURING APPARATUS AND HOLE POSITION DETECTION METHOD

To provide a measuring apparatus and a hole position detecting method capable of detecting a position of a hole in a workpiece.SOLUTION: A measuring apparatus 1 includes: a table 20 on which a workpiece 9 is placed; a stylus 41 that can be displaced in a direction intersecting a hole forming surface...

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1. Verfasser: HIRANO KOTARO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a measuring apparatus and a hole position detecting method capable of detecting a position of a hole in a workpiece.SOLUTION: A measuring apparatus 1 includes: a table 20 on which a workpiece 9 is placed; a stylus 41 that can be displaced in a direction intersecting a hole forming surface 92 of the workpiece 9; a movement control unit that controls a relative movement mechanism so as to scan the hole forming surface 92 in a direction toward the hole 91 with the stylus 41 contacting the hole forming surface 92; a displacement detection unit that detects the displacement of the stylus 41 while the stylus 41 scans the hole forming surface 92; a measuring unit that generates shape data of the hole forming surface 92 based on the displacement of the stylus 41; an edge detection unit that detects edge points corresponding to an edge of the hole 91 from the shape data; an edge coordinate calculation unit that calculates edge coordinates that are coordinates of the edge points with respect to the table 20; and a center coordinate calculation unit that calculates the center coordinates of a virtual circle passing through at least three edge coordinates as the center coordinates of the hole 91.SELECTED DRAWING: Figure 5 【課題】ワークの穴の位置を検出できる測定装置および穴位置検出方法を提供する。【解決手段】測定装置1は、ワーク9が載置されるテーブル20と、ワーク9の穴形成面92に交差する方向に変位可能なスタイラス41と、スタイラス41が穴形成面92に当接して穴形成面92を穴91に向かう方向に走査するように相対移動機構を制御する移動制御部と、スタイラス41が穴形成面92を走査する間、スタイラス41の変位を検出する変位検出部と、スタイラス41の変位に基づいて、穴形成面92の形状データを生成する測定部と、形状データから穴91の縁に対応するエッジ点を検出するエッジ検出部と、テーブル20に対するエッジ点の座標であるエッジ座標を算出するエッジ座標算出部と、少なくとも3つのエッジ座標を通る仮想円の中心座標を、穴91の中心座標として算出する中心座標算出部と、を備える。【選択図】図5