Nut integrated with bracket and method of manufacturing the same

A method of manufacturing a nut integrated with a bracket, which forms the nut formed integrally with the bracket by using a plate material supplied between a punch and a die, the method comprising:

• a pre-drawing step of forming a reference hole and a processing cross section in the plate material supplied between the punch and the die, forming a beading portion by processing the processing cross section through multiple steps, and piercing a center of the beading portion;
• a forging step of forming a pipe portion having a tube shape by gradually widening a through hole in the beading portion and decreasing a diameter of the pipe portion from the processing cross section to a tip of the beading portion, and then processing an outer circumferential surface of the pipe portion so as to form the tube shape through multiple steps so that a thickness is increased from the tip of the pipe portion to the processing cross section, subsequent to the pre-drawing step;
• a precision forging step of precisely correcting dimensions of an inner diameter and an outer diameter of the pipe portion formed in the tube shape, forming a shape protruding from the tip of the pipe portion, and then compressing the pipe portion in order to remove residual burrs on a surface thereof, subsequent to the forging step;
• and
• a post-processing step of cutting the processing cross section to a final product shape, and then forming bent ends at both end portions of the cut processing cross section, and a threaded tap on an inner circumferential surface of the pipe portion, subsequent to the precision forging step.