Flatness testing apparatus

The utility model discloses a flatness testing apparatus for in big planar flatness detection, detection device includes fixed platform, arrange the swivel work head on the fixed platform in and arrange the level form frock ruler on the swivel work head admittedly in, on fixed platform installed the supporting rack of big plane side in waiting to detect, the frock ruler is arranged in to be waitedto detect big planar top and rotates along with swivel work head, the utility model discloses a detection device adopts the horizontal frock ruler very little than long ruler, and through the rotation of installing the swivel work head on fixed platform, big planar surface during the cover of messenger's frock ruler is whole is aided with conventional clearance gauge and light gap method to reachhigh accuracy and direct flatness detection, the strong precision height that just detects of practicality. 本实用新型公开了种平面度检测装置，用于中大平面的平面度检测，检测装置包括固定平台、置于固定平台上的旋转工作台和固置于旋转工作台上的水平状工装直尺，固定平台安装在待检测中大平面侧边的支承架上，工装直尺位于待检测中大平面的上方且随旋转工作