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US 8,555,484 B2Granted
Method of manufacturing a yoke of a rotating electric machine
AssigneeMitsuba Corporation
InventorsTsugio Yokoo, Keiichi Hosoi
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a yoke includes forming a through-hole that is open in a yoke bottom surface and a cylindrical bearing support portion by burring an edge of the through-hole using a burring punch, wherein the burring punch is located on a base end side at a distance from a cylinder front-end portion of the bearing support portion so as to form a ring-shaped flange portion inclined toward an inner radial side on the cylinder front-end portion of the bearing support portion.
Claims5
A method for manufacturing a yoke, comprising:
- forming a through-hole that is open in a yoke bottom surface of the yoke so as to penetrate a rotating shaft therein and a cylindrical bearing support portion by burring an edge of the through-hole with a burring punch that extrudes from inside of the yoke toward a yoke bottom side;
- and
- forming a ring-shaped flange portion inclined toward an inner radial side on a cylinder front-end portion of the bearing support portion by finishing extruding of the burring punch when a front-end side part of the burring punch is located on a base end side at a distance from the cylinder front-end portion of the bearing support portion.
A method for manufacturing a yoke, comprising:
- forming a through-hole that is open in a yoke bottom surface of the yoke so as to penetrate a rotating shaft therein and a cylindrical bearing support portion by burring an edge of the through-hole with a burring punch that extrudes from a yoke bottom side toward an inside of the yoke;
- and
- forming a ring-shaped flange portion inclined toward an inner radial side on a cylinder front-end portion of the bearing support portion by finishing extruding of the burring punch when a front-end side part of the burring punch is located on a base end side at a distance from the cylinder front-end portion of the bearing support portion.
Dependencies are inferred from the claim text.