US 11,786,960 B2
Method for manufacturing stabilizer
Hiroshi Mizukami, Yokohama (JP); Masato Inaba, Yokohama (JP); Masato Sugawara, Yokohama (JP); and Michiya Masuda, Yokohama (JP)
Assigned to NHK SPRING CO., LTD., Yokohama (JP)
Appl. No. 17/439,583
Filed by NHK SPRING Co., Ltd., Yokohama (JP)
PCT Filed Mar. 12, 2020, PCT No. PCT/JP2020/010692
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/189469, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-049321 (JP), filed on Mar. 18, 2019.
Prior Publication US 2022/0152689 A1, May 19, 2022
Int. Cl. B21K 1/06 (2006.01); B60G 21/02 (2006.01)
CPC B21K 1/06 (2013.01) [B60G 21/026 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing a stabilizer,
the stabilizer including:
a main body bar that is elastically deformable
a pair of connecting plates that are configured to be separately connected to a pair of left and right suspension devices;
a pair of transition portions that connect both end portions of the main body bar and the pair of the connecting plates; and
a sealing material that is arranged in each of the pair of the connecting plates;
the method comprising:
a forging step of forming the connecting plate by forging both end portions of a material tube, wherein
the forging step includes:
a first step of disposing a sealing metal plate inside both end portions of the material tube;
a second step of integrally heating the both end portions of the material tube and the sealing metal plate at a temperature lower than a melting point of a material of the material tube and equal to or higher than a melting point of a material of the sealing metal plate in a state where the sealing metal plate is disposed inside the both end portions of the material tube,
a third step of crushing the both end portions of the material tube in a radial direction to form the both end portions of the material tube into the pair of connecting plates and form a portion of the material tube other than the both end portions of the material tube into the main body bar and the pair of transition portions in a state where the heated sealing metal plate remains disposed between the both end portions of the heated material tube, and
a fourth step of compressing and deforming the sealing metal plate in a thickness direction to form the sealing metal plate into a sealing material by following the third step, and
the melting point of the material of the material tube is higher than the melting point of the material of the sealing metal plate.