Invention Grant
- Patent Title: Hole drilling process, and drilling tool
- Patent Title (中): 钻孔工艺和钻孔工具
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Application No.: US13990639Application Date: 2012-02-09
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Publication No.: US09321110B2Publication Date: 2016-04-26
- Inventor: Yoshitake Kasubata , Shigeru Okamoto , Yuichi Sasaki
- Applicant: Yoshitake Kasubata , Shigeru Okamoto , Yuichi Sasaki
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
- Current Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2011031383 20110216
- International Application: PCT/JP2012/052987 WO 20120209
- International Announcement: WO2012/111526 WO 20120823
- Main IPC: B23B35/00
- IPC: B23B35/00 ; B23B39/04 ; B23B39/08 ; B23Q17/22 ; B23Q15/24 ; B23B41/02 ; B23B51/04

Abstract:
The hole drilling process is for drilling a hole on a supported tube sheet by using a first drilling tool that can drill a hole with a diameter smaller than that of a mounting hole that is to become a target hole, and a second drilling tool that can drill a hole with a diameter equal to the diameter of the target hole, the process including: a temporary hole drilling step in which a temporary hole with a predetermined depth set beforehand is drilled by moving the first drilling tool to a drilled position set beforehand; a hole measuring step in which a distance (S) between an existing mounting hole and the temporary hole; a drilled position correcting step in which the drilled position is corrected based upon the distance (S) between the mounting hole and the temporary hole.
Public/Granted literature
- US20130259588A1 HOLE DRILLING PROCESS, AND DRILLING TOOL Public/Granted day:2013-10-03
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