Bellows having tweezers-shaped corrugated portions and method for manufacturing same
AssigneeUnion Corporation
InventorKyung Sang CHO
Life of this patent
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Abstract
The present invention relates to a bellows having tweezers-shaped corrugated portions for increasing resistance and restoring force against torsion, and a method for manufacturing the same, the bellows comprising: a first flat part having a flat cylindrical shape; a second flat part having a flat cylindrical shape and disposed opposite to the first flat part; and a plurality of corrugated portions, each having a tweezers shape and disposed between the first flat part and the second flat part, wherein each of the plurality of corrugated portions is sequentially connected to each other, so as to increase resistance and restoring force against torsion.
Claims5
A bellows comprising:
- a first flat part having a flat cylindrical shape;
- a second flat part having a flat cylindrical shape and disposed opposite to the first flat part;
- and
- a plurality of corrugated portions, each having a tweezers shape and disposed between the first flat part and the second flat part,
- wherein the plurality of corrugated portions are sequentially connected to each other,
- each corrugated portion comprises:
- a protrusion portion having a first surface and a second surface successively provided next to the first surface in parallel, in which the first surface and the second surface are in close contact with each other, and a connecting portion of the first surface and the second surface protrudes in a circular shape;
- a convex portion having a third surface extending from the first surface and protruding outward in a convex shape and a fourth surface extending from the second surface and protruding outward in a convex shape;
- and
- a concave portion having a fifth surface extending from the third surface and recessed inward in a concave shape and a sixth surface extending from the fourth surface and recessed inward in a concave shape, and
- the corrugated portions are connected to each other at the concave portion.
A method of manufacturing a bellows, the method comprising:
- (a) providing a base metal for forming the bellows around a head;
- (b) supporting the base metal with a support device and a movable device after holding the first flat surface with respect to the base metal;
- (c) applying pressure to the base metal provided between the support device and the movable device;
- (d) forming corrugated portions by moving the movable device toward the support device after the base metal is formed into a predetermined size,
- wherein the corrugated portions are sequentially formed through a hydro-forming method, and
- each corrugated portion comprises:
- a protrusion portion having a first surface and a second surface successively provided next to the first surface in parallel, in which the first surface and the second surface are in close contact with each other, and a connecting portion of the first surface and the second surface protrudes in a circular shape;
- a convex portion having a third surface extending from the first surface and protruding outward in a convex shape and a fourth surface extending from the second surface and protruding outward in a convex shape;
- and
- a concave portion having a fifth surface extending from the third surface and recessed inward in a concave shape and a sixth surface extending from the fourth surface and recessed inward in a concave shape.
Dependencies are inferred from the claim text.