Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Patent
1984-07-30
1986-05-06
Peters, Jimmy C.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
408211, B23B 5100
Patent
active
045868581
ABSTRACT:
A rotary cutting tool having at an axial end surface thereof two cutting edge lines arranged substantially in a diametral plane extending through a center of rotation of the tool, one cutting edge line having an inner cutting edge section adjacent to the center and the other having an inner noncutting edge section adjacent to the center. Each of the cutting edge lines has at least one intermediate noncutting edge section. The at least one intermediate noncutting edge section of the cutting edge line having the inner cutting edge section is located within a radial range far from the center larger than a radius from the center of the inner noncutting edge section of the other cutting edge line. The total length of the at least one intermediate noncutting edge section of the cutting edge line having the inner cutting edge section is greater than a length of the inner noncutting edge section of the other cutting edge line. The intermediate noncutting edge section of the cutting edge line having the inner noncutting edge section is located within a radius from the center smaller than a radius from the center of an outermost cutting edge section of the cutting edge line having the inner cutting edge section. The length of the intermediate noncutting edge section of the cutting edge line having the inner noncutting edge section is smaller than the total length of the intermediate noncutting edge section of the cutting edge line having the inner cutting edge section.
REFERENCES:
patent: 3726352 (1973-04-01), Roos
patent: 4108567 (1978-08-01), Faber
patent: 4149821 (1979-04-01), Faber
patent: 4194862 (1980-03-01), Zweekly
patent: 4367991 (1983-01-01), Grafe
patent: 4411563 (1983-10-01), Moon
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