US 11,951,521 B2
Method of manufacturing connection member
Toru Kojima, Toyota (JP)
Assigned to AISIN TAKAOKA CO., LTD., Toyota (JP)
Appl. No. 17/272,042
Filed by AISIN TAKAOKA CO., LTD., Toyota (JP)
PCT Filed Sep. 13, 2019, PCT No. PCT/JP2019/036228
§ 371(c)(1), (2) Date Feb. 26, 2021,
PCT Pub. No. WO2020/066721, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 2018-182047 (JP), filed on Sep. 27, 2018.
Prior Publication US 2021/0346931 A1, Nov. 11, 2021
Int. Cl. B21D 19/08 (2006.01); F01N 13/18 (2010.01); F16L 23/032 (2006.01)
CPC B21D 19/082 (2013.01) [F01N 13/1855 (2013.01); F01N 13/1872 (2013.01); F16L 23/032 (2013.01); F01N 2450/24 (2013.01)] 6 Claims
OG exemplary drawing
 
1. 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.