US 11,786,951 B2
Manufacturing method for metal component and manufacturing apparatus for metal component
Taizo Ishizaki, Itami (JP); Naruaki Shinomiya, Izumi (JP); and Nobuhiko Shirakawa, Izumi (JP)
Assigned to ISHIZAKI PRESS INDUSTRIAL CO., LTD., Hyogo (JP); and OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY, Osaka (JP)
Appl. No. 16/469,780
Filed by ISHIZAKI PRESS INDUSTRIAL CO., LTD., Itami (JP); and OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY, Izumi (JP)
PCT Filed Dec. 28, 2017, PCT No. PCT/JP2017/047162
§ 371(c)(1), (2) Date Jan. 30, 2020,
PCT Pub. No. WO2018/179657, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-061398 (JP), filed on Mar. 27, 2017.
Prior Publication US 2020/0206796 A1, Jul. 2, 2020
Int. Cl. B21D 22/02 (2006.01); B21D 37/16 (2006.01)
CPC B21D 22/022 (2013.01) [B21D 37/16 (2013.01)] 7 Claims
OG exemplary drawing
 
6. A manufacturing method for a metal component, the manufacturing method comprising:
(a) locally induction-heating a metal plate using a ring-shaped induction heating coil, the metal plate having a processing region and a non-processing region outside the processing region, wherein the processing region comprises an inner area and an outer area outside the inner area, and wherein the inner area comprises a contact area;
(b) after step (a), using a die and punch assembly to punch the metal plate along a boundary defined between the processing region and the non-processing region to form a blank that includes the processing region and does not include the non-processing region; and
(c) after step (b), using the die and punch assembly to warm draw the blank,
wherein steps (b) and (c) are performed without interruption after step (a);
wherein, during step (a):
the inner area of the processing region aligns with an open area within the ring-shaped induction heating coil,
a distance between the ring-shaped heating coil and the boundary between the processing region and the non-processing region is less than a distance between the ring-shaped heating coil and the inner area of the processing region,
the outer area of the processing region aligns with a coil of the ring-shaped induction heating coil and is heated to a higher temperature than the inner area of the processing region, and
at least a portion of the outer area of the processing region is heated to have a temperature that increases in a direction away from the inner area of the processing region; and
wherein, during step (c): a shoulder and a tip surface of the punch assembly is in contact with the contact area of the processing region, and
the outer area of the processing region is deformed by a greater amount than the inner area of the processing region.