公开(公告)号：US09802262B2

公开(公告)日：2017-10-31

申请号：US14401745

申请日：2012-06-22

申请人： Kazumitsu Harada ,  Hironori Yamamoto ,  Toshihiro Satoh

发明人： Kazumitsu Harada ,  Hironori Yamamoto ,  Toshihiro Satoh

IPC分类号： B23G5/06 ,  B23G7/02

CPC分类号： B23G5/06 ,  B23G7/02 ,  B23G2200/46

摘要： A thread forming tap includes a screw thread formed into a male thread shape with margin portions disposed to project in radial direction and relief portions having a diameter smaller than the margin portions, the margin portions and relief portions alternatively arranged and, thread forming tap causes the margin portions of the screw thread to cut into a surface layer portion of a prepared hole formed in a work to plastically deform the surface layer portion to form a female thread, margin portions are formed into a ridge line shape with a width dimension of zero at least at a thread bottom of the screw thread, and margin portions are formed into a ridge line shape with a width dimension of zero in a range from a thread bottom of the screw thread to a position between the thread bottom and an effective diameter position of the screw thread.

公开(公告)号：US20150158102A1

公开(公告)日：2015-06-11

申请号：US14401745

申请日：2012-06-22

申请人： Kazumitsu Harada ,  Hironori Yamamoto ,  Toshihiro Satoh

发明人： Kazumitsu Harada ,  Hironori Yamamoto ,  Toshihiro Satoh

IPC分类号： B23G5/06

CPC分类号： B23G5/06 ,  B23G7/02 ,  B23G2200/46

摘要： A thread forming tap includes a screw thread formed into a male thread shape with margin portions disposed to project in radial direction and relief portions having a diameter smaller than the margin portions, the margin portions and relief portions alternatively arranged and, thread forming tap causes the margin portions of the screw thread to cut into a surface layer portion of a prepared hole formed in a work to plastically deform the surface layer portion to form a female thread, margin portions are formed into a ridge line shape with a width dimension of zero at least at a thread bottom of the screw thread, and margin portions are formed into a ridge line shape with a width dimension of zero in a range from a thread bottom of the screw thread to a position between the thread bottom and an effective diameter position of the screw thread.

摘要翻译： 螺纹成型丝锥包括形成为阳螺纹形状的螺纹，其具有设置成沿径向突出的边缘部分和具有小于边缘部分的直径的凸出部分，边缘部分和释放部分交替布置，并且螺纹成形丝锥使得 螺纹的边缘部分切割成在工件中形成的预制孔的表面层部分，以使表面层部分塑性变形以形成阴螺纹，边缘部分形成为宽度尺寸为零的棱线形状 至少在螺纹的螺纹底部，并且边缘部分形成为从螺纹的螺纹底部到螺纹底部与螺纹底部与有效直径位置之间的位置的宽度尺寸为零的棱线形状 螺纹。