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US 12,186,793 B2Granted
Spinning device and spinning method
AssigneeNihon Spindle Manufacturing Co., Ltd.
InventorYoshiaki Takada
Life of this patent
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Abstract
A spinning device includes a flange forming section that, in a state where a base material having a tubular shape and including at least a large-diameter portion and a small-diameter portion is relatively rotated, forms a flange portion protruding in a direction away from a center axis by pressing the large-diameter portion in a center axis direction of the base material while contacting an outer peripheral portion of the small-diameter portion.
Claims11
A spinning device comprising:
- one or more rollers that are rotatable around an axis perpendicular to a center axis of a base material;
- and
- a motor that is configured to rotate the one or more rollers;
- wherein the one or more rollers, in a state where the base material having a tubular shape and including at least a large-diameter portion and a small-diameter portion is relatively rotated, are configured to form a flange portion protruding from an outer periphery of the large-diameter portion in a direction away from the center axis of the base material,
- each of the one or more rollers includes
- a constant outer diameter portion,
- a convexly curved portion that is disposed on an upper side of the constant outer diameter portion and is rounded and overhangs, and
- a portion where an outer diameter of the roller gradually increases toward the constant outer diameter portion side, disposed between the constant outer diameter portion and the convexly curved portion, and
- the convexly curved portion is configured to press by pressing the large-diameter portion in a center axis direction of the base material in a direction parallel to the center axis while contacting an outer peripheral portion of the small-diameter portion, so that a part of the large- diameter portion is protruded in the direction away from the center axis and reaches the constant outer diameter portion and the portion to be adjusted to a shape of the flange portion.
6 more elements
A spinning method comprising:
- a machining process of performing machining on a base material having a tubular shape and including at least a large-diameter portion and a small-diameter portion,
- wherein in the machining process, a flange forming section is used to form a flange portion protruding from an outer periphery of the large-diameter portion in a direction away from a center axis of the base material,
- the flange forming section has a roller that is rotatable around an axis perpendicular to the center axis,
- the roller includes
- a constant outer diameter portion,
- a convexly curved portion that is disposed on an upper side of the constant outer diameter portion and is rounded and overhangs, and
- a portion where an outer diameter of the roller gradually increases toward the constant outer diameter portion side, disposed between the constant outer diameter portion and the convexly curved portion, and
- the convexly curved portion presses the large-diameter portion in a direction parallel to the center axis while contacting an outer peripheral portion of the small-diameter portion in a state where the base material is relatively rotated, so that a part of the large-diameter portion is protruded in the direction away from the center axis and reaches the constant outer diameter portion and the portion to be adjusted to a shape of the flange portion.
5 more elements
Dependencies are inferred from the claim text.