US 12,241,496 B2
Member for fastening and method of manufacturing same
Hideaki Matsuoka, Nagakute (JP); Gaku Kitahara, Nagakute (JP); Tatsuyuki Amago, Nagakute (JP); Hiroyuki Mori, Nagakute (JP); Jun Yaokawa, Nagakute (JP); Kyosuke Izuno, Nisshin (JP); Kohei Takahashi, Nisshin (JP); Tomohiko Sekiguchi, Nagakute (JP); and Ayaka Kagami, Toyota (JP)
Assigned to KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Feb. 3, 2023, as Appl. No. 18/164,159.
Claims priority of application No. 2022-044150 (JP), filed on Mar. 18, 2022.
Prior Publication US 2023/0296125 A1, Sep. 21, 2023
Int. Cl. F16B 37/06 (2006.01); B23K 11/14 (2006.01)
CPC F16B 37/061 (2013.01) [B23K 11/14 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of manufacturing a member for fastening obtained by joining a nut to a panel of an aluminum base material,
the panel having a mounting hole for the nut,
the nut comprising:
a main body having an internal thread and a bearing surface, the bearing surface being wider than the mounting hole; and
a tubular joint portion extending from the bearing surface side to one side in an axial direction of the internal thread, the tubular joint portion being longer than a depth of the mounting hole,
the tubular joint portion having a rotation-preventing portion and a guide portion, the rotation-preventing portion having a concave and convex shaped outer peripheral surface, the guide portion extending from the rotation-preventing portion to the one side and having a width smaller than an maximum width of the outer peripheral surface of the rotation-preventing portion,
the method comprising:
an energization step of energizing the nut from a pair of electrodes to soften a periphery of the mounting hole of the panel by resistance heat generation of the nut, the guide portion of the nut being inserted in the mounting hole from another surface side than one surface side of the panel, the pair of electrodes being in contact with both end surface sides of the nut; and
a pressurization step of swaging one end portion of the guide portion by a pressing force applied from the electrodes to the nut to form a retaining portion and allow the rotation-preventing portion to bite into the mounting hole, the retaining portion having a widened width on the one surface side of the panel.