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US 4,218,159 AGranted
Multiple-part hobbing cutter
AssigneeSack GmbH
InventorHans Langen
Life of this patent
Estimating the term…
Abstract
The body of a gear hob consists of a plurality of adjacent disc-shaped segments. A helix of successive cutting teeth extends around the body and is formed by the adjoining peripheries of the segments. First and second metal cutter plates are replaceably mounted on the teeth flanks. The first cutter plate is mounted at the top of a respective tooth flank and the second cutter plate is mounted on the opposite flank. The first and second cutters alternate along the helix at each side of the teeth and their cutting paths overlap.
Claims14
A gear hob comprising:
- a body comprising at least one disc-shaped body segment;
- a helix of successive teeth extending around said body and formed by the periphery of said body, each said tooth having a flank;
- first metal cutter plates replaceably mounted respectively at the top of at least some of said tooth flanks;
- second metal cutter plates replaceably mounted at the top of respective opposing tooth flanks, said first and second cutter plates alternating along the helix at opposite sides of at least some of the adjacent teeth and having at least partially overlapping cutting paths;
- and
- at least one said tooth serving to cut on the normal to the cutter axis which extends through the center of the gear wheel and being provided in the region of the apex of said at least one tooth with a further hard-metal reversible plate having an arc-shaped cutting edge for rounding-off the tooth space, the radius of said arc-shaped cutting edge being determined by the desired rounding-off in the tooth base.
3 more elements
A gear hob comprising:
- a body comprising at least one disc-shaped body segment;
- a helix of successive teeth extending around said body and formed by the periphery of said body, each said tooth having a leading face, a top and two flanks, and having a seat cut into each leading face and extending along one of said flanks at said top;
- and
- first cutter plates replaceably mounted at the top of respective tooth flanks for cutting both with a top-cutting edge and a single side-cutting edge, said first cutter plates comprising interchangeable hard metal reversible plates having straight edges and being mounted in respective seats in said tooth flanks, each said plate having a broad face and a narrow face, said narrow face serving as a leading face defining said top-cutting and side-cutting edges.
1 more element
A gear hob comprising:
- a body comprising at least one disc-shaped body segment;
- a helix of successive teeth extending around said body and formed by the periphery of said body, each said tooth having a top and two flanks;
- first cutter plates replaceably mounted at the top of respective tooth flanks for cutting both with a top-cutting edge and a side-cutting edge, said first cutter plates comprising interchangeable hard metal reversible plates having straight edges and being mounted on said respective tooth flanks with a narrow limiting face as leading face defining said top-cutting and side-cutting edges;
- and
- second metal cutter plates replaceably mounted at a radial distance inwardly from the top of respective opposing tooth flanks for cutting with a side-cutting edge only, said first and second cutter plates alternating along said helix from left-hand to right-hand tooth flanks and having overlapping cutting paths as to their side-cutting edges.
2 more elements
A gear hob comprising:
- a body comprising at least one disc-shaped body segment;
- a helix of successive teeth extending around said body and formed by the periphery of said body, each said tooth having a top and two flanks;
- and
- first cutter plates replaceably mounted at the top of respective tooth flanks for cutting both with a top-cutting edge and a side-cutting edge, said first cutter plates comprising interchangeable hard metal reversible plates having straight edges and being mounted on said respective tooth flanks with a narrow limiting face as leading face defining said top-cutting and side-cutting edges,
- wherein at least one said tooth serves to cut on the normal to the cutter axis which extends through the center of the gear wheel, said at least one tooth being provided in the region of the apex thereof with a further hard-metal reversible plate having an arc-shaped cutting edge for rounding-off the tooth space, the radius of said arc-shaped cutting edge being determined by the desired rounding-off in the tooth base.
2 more elements
Dependencies are inferred from the claim text.