MAGNETIC PARTICLE FLAW INSPECTION DEVICE AND MAGNETIC PARTICLE FLAW INSPECTION METHOD

To provide a magnetic particle flaw inspection device and magnetic particle flaw inspection method which can perform magnetic particle inspection of a threaded steel pipe regardless of the shape of a screw part and an inspection portion.SOLUTION: A magnetic particle flaw inspection device 1 comprises: a magnetization unit 20 which magnetizes a screw part 2b of a threaded steel pipe 2; a magnetic particle supply unit 16 which supplies magnetic particles to the screw part 2b; imaging devices 14a to 14h which are arranged side by side in the axial direction of the threaded steel pipe 2 to image the screw part 2b; and an image processing unit 33 which combines photographed images Img-a to Img-h photographed by the imaging devices 14a to 14h. The imaging devices 14a to 14h are arranged such that the screw part 2b is continuously imaged by an imaging end region in the axial direction in each of the photographed images Img-a to Img-h. The image processing unit 33 connects the imaging end regions by the imaging devices 14a to 14h to combine the photographed images Img-a to Img-h.SELECTED DRAWING: Figure 1 【課題】ネジ部の形状及び検査部分によらずネジ切り鋼管の磁粉探傷が可能な磁粉探傷装置及び磁粉探傷方法を提供すること。【解決手段】磁粉探傷装置１は、ネジ切り鋼管２のネジ部２ｂを磁化する磁化部２０と、ネジ部２ｂに磁粉を供給する磁粉供給部１６と、ネジ切り鋼管２の軸方向に並設され、ネジ部２ｂを撮像する撮像装置１４ａ〜１４ｈと、撮像装置１４ａ〜１４ｈにより撮像された撮像画像Ｉｍｇ−ａ乃至Ｉｍｇ−ｈを合成する画像処理部３３と、を備え、撮像装置１４ａ〜１４ｈは、それぞれの撮像画像Ｉｍｇ−ａ乃至Ｉｍｇ−ｈにおける軸方向の撮像端部領域によりネジ部２ｂが連続的に撮像されるように配置され、画像処理部３３は、撮像装置１４ａ〜１４ｈによる撮像端部領域を繋ぎ合わせて撮像画像Ｉｍｇ−ａ乃至Ｉｍｇ−ｈを合成する。【選択図】図１