发明申请
- 专利标题: Drill and drilling method for workpiece
- 专利标题(中): 钻孔和钻孔方法
-
申请号: US12318249申请日: 2008-12-23
-
公开(公告)号: US20100158626A1公开(公告)日: 2010-06-24
- 发明人: Tatsuo Nakahata , Manabu Saito , Masanori Hosoi , Hideharu Takahashi
- 申请人: Tatsuo Nakahata , Manabu Saito , Masanori Hosoi , Hideharu Takahashi
- 主分类号: B23B51/02
- IPC分类号: B23B51/02 ; B23B35/00
摘要:
A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0°
公开/授权文献
- US09180531B2 Drill and drilling method for workpiece 公开/授权日:2015-11-10
信息查询