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公开(公告)号：US09682435B2
公开(公告)日：2017-06-20
申请号：US14471798
申请日：2014-08-28
Applicant: Kennametal Inc.
Inventor： Yan Yan , Emmanuel Puviland
CPC classification number: B23G5/06 , B23G5/005 , B23G7/02 , B23G2200/30 , B23G2200/34 , B23G2240/12 , Y10T408/90467 , Y10T408/9048
Abstract: In one aspect, thread forming taps are described herein. In some embodiments a thread forming tap comprises a shank disposed at a first end adapted to engage a tool holder and an elongated working portion disposed at a second end. The working portion comprises at least one helical thread and a plurality of longitudinally-extending linear grooves. The longitudinally-extending linear grooves intersect the helical thread forming a plurality of lobes, wherein adjacent lobes differ from one another in relief type and/or relief rate.
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公开(公告)号：US10766083B2
公开(公告)日：2020-09-08
申请号：US15609222
申请日：2017-05-31
Applicant: Kennametal Inc.
Inventor： Yan Yan , Stephen Michael George
Abstract: A spiral flute tap includes a body having an axial forward end and an axial rearward end. The body has a cylindrical shank portion adjacent the axial rearward end, a threaded fluted portion adjacent the axial forward end, a non-threaded fluted portion between the cylindrical shank portion and the threaded fluted portion, and a central, longitudinal axis. The spiral flute tap further includes a plurality of helical flutes formed at a helix angle, HA, with respect to the central, longitudinal axis of the tap that continuously increases in magnitude in the threaded fluted portion. In other words, the lead of the plurality of helical flutes continuously decreases in magnitude in a rearward direction for a predetermined distance. In one example, the helix angle, HA, varies at a rate of between 0.5 degrees/mm to 4.0 degrees/mm. A method of making the spiral flute tap is also disclosed.
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公开(公告)号：US20160059334A1
公开(公告)日：2016-03-03
申请号：US14471798
申请日：2014-08-28
Applicant: Kennametal Inc.
Inventor： Yan Yan , Emmanuel Puviland
IPC: B23G5/06
CPC classification number: B23G5/06 , B23G5/005 , B23G7/02 , B23G2200/30 , B23G2200/34 , B23G2240/12 , Y10T408/90467 , Y10T408/9048
Abstract: In one aspect, thread forming taps are described herein. In some embodiments a thread forming tap comprises a shank disposed at a first end adapted to engage a tool holder and an elongated working portion disposed at a second end. The working portion comprises at least one helical thread and a plurality of longitudinally-extending linear grooves. The longitudinally-extending linear grooves intersect the helical thread forming a plurality of lobes, wherein adjacent lobes differ from one another in relief type and/or relief rate.
Abstract translation: 在一个方面，这里描述了螺纹成形抽头。 在一些实施例中，螺纹成型丝锥包括设置在适于接合工具保持器的第一端和设置在第二端的细长工作部分的柄。 工作部分包括至少一个螺旋螺纹和多个纵向延伸的直线槽。 纵向延伸的线性槽与形成多个凸角的螺旋形螺纹相交，其中相邻的凸角在浮雕型和/或释放速率方面彼此不同。
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公开(公告)号：US20180345394A1
公开(公告)日：2018-12-06
申请号：US15609222
申请日：2017-05-31
Applicant: Kennametal Inc.
Inventor： Yan Yan , Stephen Michael George
Abstract: A spiral flute tap includes a body having an axial forward end and an axial rearward end. The body has a cylindrical shank portion adjacent the axial rearward end, a threaded fluted portion adjacent the axial forward end, a non-threaded fluted portion between the cylindrical shank portion and the threaded fluted portion, and a central, longitudinal axis. The spiral flute tap further includes a plurality of helical flutes formed at a helix angle, HA, with respect to the central, longitudinal axis of the tap that continuously increases in magnitude in the threaded fluted portion. In other words, the lead of the plurality of helical flutes continuously decreases in magnitude in a rearward direction for a predetermined distance. In one example, the helix angle, HA, varies at a rate of between 0.5 degrees/mm to 4.0 degrees/mm. A method of making the spiral flute tap is also disclosed.
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