公开(公告)号：US20190232454A1

公开(公告)日：2019-08-01

申请号：US16192855

申请日：2018-11-16

申请人： SANSHIN CO., LTD.

发明人： Koji HOSOKAI ,  Takayuki ADACHI

IPC分类号： B24B21/00 ,  B24B41/06 ,  B24B21/02 ,  B24B21/16

CPC分类号： B24B21/002 ,  B24B21/006 ,  B24B21/02 ,  B24B21/16 ,  B24B21/18 ,  B24B41/061

摘要： Loopback rolls which can transfer and guide a polishing tape (T) in a tangential direction of a pressure contact roll (R) is provided, a top edge face (RG1) and a tapered peripheral edge (RG) having a pair of slant edge faces (RG2) are formed on a periphery of the pressure contact roll, by both of which the polishing tape can be bent into a substantially V-shape in cross section, and a switchable pressure contact mechanism (7) is switchably provided which pressure contacts each of bent portions (T) of the polishing tape, which is bent into the substantially V-shape in cross section by the tapered peripheral edge to one tooth face (B1) or the other tooth face of a bottom land (B) of a worm (W).