PURPOSE: To eliminate deviation of the center of working part and the center of a punch due to warping of a slide die and to improve accuracy of work in a cam die that burrs a work by providing a lifter that lifts the work and die simultaneously.

CONSTITUTION: When burring a work W, the work drawn to U-shaped sectional form in the preceding process is placed on a lifter 13, and held between a pad 14 and a nest 25 by lowering an upper die 2. The upper die 2 is further lowered continuously, and a slide cam 10 is advanced on the cam face 19 of a drive cam 20, and burring work is performed on the side wall of the work W by joint work of a punch 9 and the working part 8 to protrude a flange part F on the inner face of the work. In this case, by enabling simultaneous lifting of the work W and a die guide 27 by a lifter 13, the slide die is lifted at the same time. Accordingly, deviation from the punch 9 is eliminated, and the accuracy of burring work is improved.