The present invention relates to a burring method for a plate. Specifically, the present invention provides the burring method for a plate, capable of improving accuracy of a burring protrusion (B) and easily forming the burring protrusion (B) having a thickness thinner than a thickness (A1) of a plate (A). According to the present invention, the burring method for a plate includes: a boring step (S1) of forming a burring hole (A2) by placing the plate (A) between upper and lower molds (C, D) installed in a press and enabling a cutting pin (D1) of the upper mold (D) to pass through a cutting hole (C1) formed on one side of the upper surface of the lower mold (C); a forging step (S1-1) of forming a forging space (11) on one side of the cutting hole (C1) of the lower mold (C) and also including a forging pushing pin (12) in the upper mold (D) of the forging space (11), wherein a middle burring protrusion (10) is formed by the forging pushing pin (12) as the burring hole (A2) formed in the previous step is forged by being punched in the forging step (S1-1); and a burring step (S2) of forming a forming hole (C2) on one side of the forging space (11) of the lower mold (C) and including a burring pushing pin (D2) in the upper mold (D) of the forming hole (C2), wherein the middle burring protrusion (10) formed in the previous step passes through the forming hole (C2) by the burring pushing pin (D2) and the burring protrusion (B) having the thickness (B1) thinner than the thickness (A1) of the plate (A) is formed in the burring step (S2).
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