Duct cutting-and-forming device for elbow duct manufacturing device

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.