CUTTING DEVICE OF PIPE END INTERNAL FACE AND CUTTING METHOD

• Main Authors: OYAMA TAKAFUMI, ASHITACHI AKIRA, MASUOKA HIRONOBU, KUROKAWA YASUHARU, SUGANO KOJI
• Format: Patent
• Language: English; Japanese
• Published: 08.09.2016
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

PROBLEM TO BE SOLVED: To provide a cutting device 1 of a pipe end internal face which can perform cutting following a shape of an internal face in order to remove a scratch of a pipe internal face (in particular, a scratch of the pipe end internal face), and a cutting method.SOLUTION: A cutting edge 4, a first copying roller 11 and a second copying roller 12 are arranged at a cutting head 3, a first copying roller 11 is arranged ahead of the cutting edge 4 in a progressing direction, the second copying roller 12 is arranged reward of the cutting edge 4 in the progressing direction, the first copying roller 11 contacts with a pipe end internal face while extruding the cutting head 3 to a vertical direction with respect to a pipe axis of a steel pipe 2 by the hydraulic pressure of a working fluid, the cutting edges 4 cuts the pipe end internal face by copying the first copying roller 11 while moving in the steel pipe 2, and after the first copying roller 11 is extruded to the outside of the pipe from a pipe end opening part, the cutting edge 4 cuts the pipe end internal face while copying the second copying roller 12.SELECTED DRAWING: Figure 1 【課題】管の内面疵（とりわけ管端部の内面疵）を除去するために内面の形状に追随して切削加工を行なうことが可能な管端部内面の切削装置１および切削方法を提供する。【解決手段】切削ヘッド３に切削刃４と第１倣いローラ１１と第２倣いローラ１２とを配設するとともに、切削刃４の進行方向前方に第１倣いローラ１１を配置し、切削刃４の進行方向後方に前記第２倣いローラ１２を配置し、作動油の油圧で切削ヘッド３を鋼管２の管軸に対して垂直方向に押し出しながら、第１倣いローラ１１が管端部内面に接触して鋼管２内を移動する間は、第１倣いローラ１１に倣って切削刃４が管端部内面を切削し、第１倣いローラ１１が管端開口部から管外へ出た後は、第２倣いローラ１２に倣って切削刃４が管端部内面を切削する。【選択図】図１