Wire drawing die
AssigneeA.L.M.T. Corp.
InventorsKohei KURAMOTO, Kohichiroh KIMURA
Life of this patent
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Abstract
A wire drawing die is a wire drawing die including a bearing, the bearing having a diameter D smaller than 100 μm. A hole is provided in polycrystalline diamond composed substantially only of diamond having an average particle size equal to or smaller than 500 nm. A reduction angle is not smaller than 4° and not larger than 14°. A length of the bearing is not smaller than 20% D and not larger than 100% D. A concentricity between the bearing and a bell or an approach is equal to or smaller than 1.0 μm. A roundness of a hole in the bearing is equal to or smaller than 0.5 μm.
Claims4
A wire drawing die provided with a bearing, the bearing having a diameter D smaller than 100 μm, wherein
- a hole is provided in polycrystalline diamond composed substantially only of diamond having an average particle size equal to or smaller than 500 nm,
- a reduction angle is not smaller than 4° and not larger than 14°,
- a length of the bearing is not smaller than 20% D and not larger than 100% D,
- a concentricity between the bearing and a bell or an approach is equal to or smaller than 1.0 μm, and
- a roundness of a hole in the bearing is equal to or smaller than 0.5 μm.
Dependencies are inferred from the claim text.