US 12,151,272 B2
Duct cutting-and-forming device for elbow duct manufacturing device
Ok Tae Kim, Yongin-si (KR); Ki Tae Kim, Hwaseong-si (KR); and Sung Keun Noh, Suwon-si (KR)
Appl. No. 17/625,778
Filed by Ok Tae Kim, Yongin-si (KR); Ki Tae Kim, Hwaseong-si (KR); and Sung Keun Noh, Suwon-si (KR)
PCT Filed Jun. 2, 2020, PCT No. PCT/KR2020/007116
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/006483, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 10-2019-0083242 (KR), filed on Jul. 10, 2019.
Prior Publication US 2022/0274147 A1, Sep. 1, 2022
Int. Cl. B21C 37/12 (2006.01); B23D 21/14 (2006.01); B26D 3/16 (2006.01)
CPC B21C 37/125 (2013.01) [B23D 21/14 (2013.01); B26D 3/16 (2013.01); B26D 3/162 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A duct cutting and forming apparatus for elbow duct manufacturing machine, the apparatus comprising:
a rotation housing that is provided with a seating groove in a first direction;
an eccentric housing that is provided with a cutting roller and a forming roller at both ends of the eccentric housing, and that is slidably seated inside the seating groove;
a rotation drive for applying rotation driving force to the rotation housing; and
an eccentric drive for applying driving force for reciprocating the eccentric housing,
wherein the eccentric drive is configured to reciprocate the eccentric housing as the eccentric drive rotates clockwise and counterclockwise within a range not exceeding 180 degrees;
wherein the rotation drive comprises a first rotation axis that has an axis hole formed through its center and that is connected to the rotation housing;
a second rotation axis that is arranged parallel with the first rotation axis;
a first gear and a second gear, that connect the first rotation axis and the second rotation axis; and
a first driving axis that provides rotation driving force to the second rotation axis as the first driving axis is rotated by a first driving motor,
wherein the eccentric drive comprises a third rotation axis that is axially rotatably inserted into the axis hole; and
a second driving axis that provides driving force for a rotation in a forward direction and a reverse direction of the third rotation axis as the second driving axis is rotated by a second driving motor.