The deformation behaviors of the aluminum and stainless steel plates with the exit guide have been examined.
Even though the side guide reduces the curvature of the forged plate having an inclined cross-section, the plates
formed a burr for a forging interval of 1 mm and a slight curvature. To overcome these problems, a grooved die
was introduced. The grooved die is shown in Fig. 10. This die has a grooved width of 10.5 mm. The taper bottom
punch and the upper guide were employed.