Method of manufacturing connection member
AssigneeAisin Takaoka Co., Ltd.
InventorToru Kojima
Life of this patent
Estimating the term…
Abstract
After an annular plate is blanked from a metal flat plate in a blanking step, an inner peripheral portion of the annular plate is deformed upward in a burring step. As a result, a hat-shaped intermediate product having an upstanding tubular portion and an annular plate portion is formed. After that, an outer peripheral portion of the annular plate portion is folded step by step toward an inner peripheral side of the annular plate portion. As a result, a folded portion composed of a first folded portion and a second folded portion is formed, whereby a connection portion having a second flange portion is formed.
Claims6
A method of manufacturing a pipe connector for connecting a first pipe including a first flange to a second pipe to which the pipe connector is fixed, the pipe connector including a second flange to be fastened together with the first flange with a clamp, the method comprising:
- blanking a metal flat plate in a circular shape with a center hole to form an annular plate;
- bending an inner periphery of the annular plate around the center hole upward to form an upstanding tubular portion;
- folding an outer peripheral portion of the annular plate until an outer edge of the outer peripheral portion is opposed to and spaced from an outer circumferential surface of the upstanding tubular portion to form a folded portion;
- bending a portion of the annular plate between the outer edge of the outer peripheral portion and the outer circumferential surface of the upstanding tubular portion until an outer surface of the folded portion is opposed to and spaced from the outer circumferential surface of the upstanding tubular portion to define an upright portion and a flat portion;
- and
- tilting the upright portion until an outer edge of the folded portion contacts the outer circumferential surface of the upstanding tubular portion to form the second flange including the flat portion.
Dependencies are inferred from the claim text.