Abrégé

The present invention relates to a drawing apparatus for thickening and drawing a bent portion and an operating method therefor. A drawing apparatus for thickening and drawing a bent portion according to an embodiment of the present invention comprises: a punch (100) for drawing an object (A) to be processed, to generate a semi-finished product (B); a punch holder (200) for moving the punch (100) upward or downward according to the operation of a first actuator (T1); a die (300) supporting the object (A) to be processed, when the punch (100) is inserted thereinto; and a knockout (400) for ejecting the semi-finished product (B) from the die (300). According to the invention, a semi-finished product having a thickened bent portion can be produced. Therefore, the durability of the semi-finished product can be greatly increased.

Classes IPC  ?

• B21D 22/21 - Emboutissage sans maintenir le bord des flans
• B21D 45/02 - Dispositifs d'éjection

Abrégé

12nn) formed on the semi-finished product (B); and a bending part (120) for bending the workpiece (A) so as to form the semi-finished product (B).

Classes IPC  ?

• B21D 22/21 - Emboutissage sans maintenir le bord des flans
• B21D 45/02 - Dispositifs d'éjection

Abrégé

The present invention relates to a press mold device. According to the present invention, the press mold device for manufacturing, from a pipe-shaped object, to be pressed, having a hollow portion, a press-molded object having first to third segments from the top to the bottom thereof in the pipe shape in which diameters of the first segment and the third segment are respectively smaller than the diameter of the second segment comprises: a first press mold for primarily molding an initial object to be pressed; and a second press mold for secondarily molding the primarily molded object to be pressed, wherein the first press mold molds an upper joint part at which the first step and the second step are connected and a lower joint part at which the second step and the third step are connected, such that the joint parts form a curved surface having a predetermined curvature radius R1, the second press mold molds the upper joint part and the lower joint part such that the joint parts form a curved surface having a predetermined curvature radius R2, and R2 is smaller than R1.

Classes IPC  ?

• B21D 37/08 - Matrices comportant différentes parties pour différents stades d'une opération
• B21D 22/20 - Emboutissage
• B21D 45/06 - Dispositifs d'arrachage