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公开(公告)号：EP3529006A1
公开(公告)日：2019-08-28
申请号：EP17781134.6
申请日：2017-10-12
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2.发明公开
公开(公告)号：EP4387811A1
公开(公告)日：2024-06-26
申请号：EP22760932.8
申请日：2022-08-03
CPC分类号： B25D17/02 , B25D2250/14120130101 , B25D2222/7220130101 , B28D1/146 , B28D1/14 , B28D7/02
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公开(公告)号：EP3515640A1
公开(公告)日：2019-07-31
申请号：EP17764611.4
申请日：2017-09-12
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公开(公告)号：EP2994255B1
公开(公告)日：2019-03-20
申请号：EP14720592.6
申请日：2014-04-29
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公开(公告)号：EP3645229A1
公开(公告)日：2020-05-06
申请号：EP18731458.8
申请日：2018-06-19
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公开(公告)号：EP3310513A1
公开(公告)日：2018-04-25
申请号：EP16730794.1
申请日：2016-06-14
CPC分类号： E21B10/445 , B21H3/10 , B21K5/04 , B23B51/02 , B23B2224/00 , B23B2226/75 , B23B2251/406 , B23B2251/408 , B23P15/32 , B28D1/146
摘要： A drill bit (1) has, along a drill-bit axis (6), a drilling head (2), a multi-start helix (3), made of two or more helical coils (12), and an insertion end (4). The helix (3) has a helix slope (19) and a pitch (20) in a delivery region (15). In an outlet region (17) of the helix (3), said outlet region being directed towards the insertion end (4), the helical coils (12) merge continuously, within a first portion (26), from orientation in alignment with the helix slope (19) into orientation parallel to the drill-bit axis (6). A length (30) of the portion (26) is at least quarter the pitch (20) of the delivery region (15). The helical coils (12), in a second portion (27), are oriented parallel to the drill-bit axis (6).
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7.发明授权BOHRER UND HERSTELLUNGSVERFAHREN FÜR EINEN BOHRER 有权BOHRER UND HERSTELLUNGSVERFAHRENFÜREINEN BOHRER
公开(公告)号：EP2771143B1
公开(公告)日：2017-08-30
申请号：EP12737786.9
申请日：2012-07-18
CPC分类号： B23B51/02 , B21H3/10 , B23B51/00 , B23B2226/75 , B23B2251/40 , B23B2251/406 , B23B2251/408 , B23P15/32 , B28D1/146 , E21B10/445 , Y10T408/907
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公开(公告)号：EP2994255A1
公开(公告)日：2016-03-16
申请号：EP14720592.6
申请日：2014-04-29
CPC分类号： B23B51/02 , B21H3/10 , B23B2251/406 , B23P15/32 , E21B10/445
摘要： The twist drill (1) of the invention has a drill head (3), a continuous two-fluted to six-fluted helix (4), and an insertion end (5), said parts being successively arranged along a drill axis (2). The helix (4) has a radial outer dimension (18) that varies periodically, three to six times per revolution about the drill axis (2). The invention also relates to a method for manufacturing a drill of this type.
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9.发明公开BOHRER UND HERSTELLUNGSVERFAHREN FÜR EINEN BOHRER 有权BOHRER UND HERSTELLUNGSVERFAHRENFÜREINEN BOHRER
公开(公告)号：EP2771143A1
公开(公告)日：2014-09-03
申请号：EP12737786.9
申请日：2012-07-18
CPC分类号： B23B51/02 , B21H3/10 , B23B51/00 , B23B2226/75 , B23B2251/40 , B23B2251/406 , B23B2251/408 , B23P15/32 , B28D1/146 , E21B10/445 , Y10T408/907
摘要： The invention relates to a drill (1) having a shaft (4) along an axis (2) between a drill head (3) and an insertion end (5). The shaft (4) is provided with at least two first grooves (34) extending along the axis (2) and at least one second helical groove (31). The first grooves (34) and the second groove (31) cross one another at several intersections (41). A groove width (35) of the first groove (34) continuously decreases in the course between two adjacent intersections (41) from one of the intersections (41) to a narrowest point (42). After the narrowest point (42), the groove width (35) continuously increases to the other of the intersections (41).
摘要翻译： 钻头在沿着轴线（2）的钻头（3）和可插入端（5）之间具有柄（4）。 杆（4）设置有沿轴线（2）和至少第二螺旋槽（31）延伸的至少两个第一凹槽（34）。 第一凹槽（34）和第二凹槽（31）在几个交叉点（41）处彼此交叉。第一凹槽34的宽度（35）从两个交叉点之一的两个相邻交叉点（41）之间的区域稳定地减小 （41）一直到最狭窄的地方（42），随后一直稳步增加到另一个过境点（41）。
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