公开(公告)号：US20220297204A1

公开(公告)日：2022-09-22

申请号：US17692428

申请日：2022-03-11

申请人： BLACK & DECKER INC.

发明人： Juri SCHATZ ,  Alexander STANGL ,  Florian PROBST ,  Christoph GASTINGER

IPC分类号： B23B51/02 ,  B28D1/14

摘要： A one-piece cutting head for a drill bit includes a main cutting edge that extends between radial extremities of the cutting head. The main cutting edge is disposed between main rake surfaces and main relief surfaces. Each main rake surface includes one or more rake facets, and each main relief surface includes one or more relief facets. Adjacent rake facets and relief facets define a primary transverse edge therebetween that extends away from the main cutting edge. The cutting head further includes a plurality of side cutters that are transverse to the main cutting edge and that propagate from the primary transverse edge to a radial extremity of the cutting head. Each side cutter includes a side cutting edge between a side cutting rake facet and a side cutting relief facet.

公开(公告)号：US20240342808A1

公开(公告)日：2024-10-17

申请号：US18754709

申请日：2024-06-26

申请人： BLACK & DECKER INC.

发明人： Juri SCHATZ ,  Alexander STANGL ,  Florian PROBST ,  Christoph GASTINGER

IPC分类号： B23B51/02 ,  B28D1/14 ,  E21B10/42 ,  E21B10/43 ,  E21B10/54

CPC分类号： B23B51/02 ,  B28D1/146 ,  E21B10/42 ,  E21B10/43 ,  E21B10/54 ,  B23B2226/75 ,  B23B2251/14 ,  B23B2251/204

摘要： A one-piece cutting head for a drill bit includes a main cutting edge that extends between radial extremities of the cutting head. The main cutting edge is disposed between main rake surfaces and main relief surfaces. Each main rake surface includes one or more rake facets, and each main relief surface includes one or more relief facets. Adjacent rake facets and relief facets define a primary transverse edge therebetween that extends away from the main cutting edge. The cutting head further includes a plurality of side cutters that are transverse to the main cutting edge and that propagate from the primary transverse edge to a radial extremity of the cutting head. Each side cutter includes a side cutting edge between a side cutting rake facet and a side cutting relief facet.

公开(公告)号：US20190381582A1

公开(公告)日：2019-12-19

申请号：US16435907

申请日：2019-06-10

申请人： BLACK & DECKER INC.

发明人： Juri SCHATZ

IPC分类号： B23B51/02

摘要： A drill bit for drilling into masonry or rock includes a drilling head at its forward end, a clamping shank at its rearward end, and a helical conveying portion extending between the drilling head and the shank. The helical conveying portion includes at least two helically extending flutes separated by at least two helically extending webs. The helical conveying portion has a changeover portion, a pre-changeover portion between the drilling head and the changeover portion, and a post-changeover portion between the changeover portion and the shank. In the pre-changeover portion, the flutes have a pre-changeover pitch, the first web has a first pre-changeover web width α, and the second web has a second pre-changeover web width α′. In the post-changeover portion, the flutes have a post-changeover pitch, the first web has a first post-changeover web width β, and the second web has a second post-changeover web width β′. The post-changeover pitch is greater than the pre-changeover pitch, the first post-changeover web width β is less than the first pre-changeover web width α, and the second post-changeover web width β′ is greater than the second pre-changeover web width α′.