Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Patent
1989-02-17
1990-06-12
Howell, Daniel
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
408227, 408230, B23B 5100
Patent
active
049328158
ABSTRACT:
A tool in the form of a tapering borer or reamer has cutting portions adjacent the body of the tool with chip-receiving grooves therebetween, arranged alternately around the periphery of the tool. The cutting portions and the grooves may be of a helical configuration or may extend in a straight configuration parallel to the longitudinal axis of the tool. Each cutting portion has a cutting face and a relief face which intersect at a cutting edge. The cutting face defines a rake angle with respect to a first reference plane while the relief face defines a relief angle with respect to a second reference plane which is normal to the first reference plane. In order to improve chip removal from a workpiece being machined and the flow of chip material away therefrom, the relief angle of each cutting portion is dependent on the diameter of the generated surface defined by the cutting edges of the tool upon rotation thereof about its longitudinal central axis, said diameter varying in the longitudinal direction of the tool.
REFERENCES:
patent: 2084737 (1937-06-01), Magnus
patent: 4116580 (1978-09-01), Hall et al.
Tool and Manufacturing Engineers Handbook, vol. 1, Machining, Fourth Edition, Society of Manufacturing Engineers, 1983, pp. 9-42, 43, and 107-110.
H. Willy Krauss GmbH & Co.
Howell Daniel
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