Method and apparatus for cutting circumferential grooves on the

Details Method and apparatus for cutting circumferential grooves on the Method and apparatus for cutting circumferential grooves on the

1977-12-09

1979-02-27

Weidenfeld, Gil

90 20, 90DIG8, B23C 334

Patent

active

041412796

ABSTRACT:
A method and apparatus is disclosed for operating upon a workpiece having an internal cylindrical bore therethrough to form one or a plurality of circumferential grooves within the bore. The workpiece is held in a collet and a tool is inserted therethrough and supported for rotation at both ends. The tool has on its outer surface a row of cutting teeth for each groove to be made and has an exterior diameter including the teeth that is less than the internal diameter of the bore in the workpiece. With the tool rotated at a relatively high RPM in one direction and the workpiece rotated at a relatively low RPM in the opposite direction, the collet supporting the workpiece is moved laterally of the tool axis to contact each of the rows of cutting teeth against the internal wall of the workpiece. A single revolution of the workpiece is thus sufficient to form the entire cut. A specific arrangement of the teeth on the tool is also disclosed.

REFERENCES:
patent: 2284336 (1942-05-01), Morrison
patent: 2520222 (1950-08-01), Stone
patent: 2740331 (1956-04-01), Schwartz et al.

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