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US 12,226,860 B2Granted
Method for manufacturing sintered gear
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Sintered Allow, Ltd.
InventorsKazunari Shimauchi, Tomoyuki Ueno, Tomoyuki Ishimine, Munehiro Noda
Life of this patent
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Abstract
A method for manufacturing a sintered gear comprising the steps of: preparing a cylindrical green compact; gear-cutting the green compact with a hob; and sintering the gear-hobbed green compact, wherein the hob is such that a ratio of a number of cutting edges thereof per round to a number of starts thereof exceeds 8.
Claims17
A method for manufacturing a sintered gear comprising the steps of:
- preparing a cylindrical green compact;
- gear-cutting the green compact with a hob;
- and
- sintering the gear-hobbed green compact to form the sintered gear,
- wherein the hob is such that a ratio of a number of cutting edges thereof per round to a number of starts thereof exceeds 8, and
- wherein in the step of gear-cutting, within a particular cycle, a feed rate of the hob at a first end face of the green compact corresponding to a process starting side is slower than a feed rate of the hob at a second end face of the green compact corresponding to a process ending side.
3 more elements
A method for manufacturing a sintered gear comprising the steps of:
- preparing a cylindrical green compact;
- gear-cutting the green compact with a hob;
- and
- sintering the gear-hobbed green compact to form the sintered gear,
- wherein the hob is such that a ratio of a number of cutting edges thereof per round to a number of starts thereof exceeds 8,
- wherein the hob includes between 16 and 24 edges per round and has two starts,
- wherein the hob has an outer diameter between 80 mm and 130 mm,
- wherein in the step of gear-cutting, the hob has a variable feed rate within a particular cycle, and
- wherein in the step of gear-cutting, the hob is fed at a rate of 1.0 mm/rev. or less in a first region of the green compact within a maximum of 5 mm from a first end face of the green compact, and the hob is fed at a rate of 2.0 mm/rev. or more in a second region of the green compact other than the first region.
6 more elements
Dependencies are inferred from the claim text.