Cutters – for shaping – Rotary cutting tool – Including holder having seat for inserted tool
Patent
1987-12-02
1992-03-24
Briggs, William
Cutters, for shaping
Rotary cutting tool
Including holder having seat for inserted tool
407 24, 407 48, B23G 518, B23D 7702
Patent
active
050982320
ABSTRACT:
A thread-cutting tool comprises a shank 10 for attachment to the spindle of a milling machine, the forward end portion of which shank is formed with a flat 12 recessed to provide a pocket for a flat cutting insert 11. The insert, which is triangular in this instance, has one edge formed with a line of threadform teeth of identical profile. The teeth project laterally for cutting engagement with a work-piece. The surface of the work-piece which is to be formed with a thread is mounted on a fixed work-table of the machine. The tool is rotated about the spindle axis and is simultaneously moved by the spindle in a path centered on the axis of the surface of the work-piece to bring the teeth of the insert into engagement with the surface and the spindle and tool are moved axially continuously by a distance equal to one thread pitch for each revolution of the tool in the circular path, so in one revolution of the tool in the path a number of complete turns of the screw-thread are formed equal to the number of teeth of the insert in engagement with the work-piece.
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Briggs William
Stellram Limited
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