The forming force: (a) the vertical force for the forming process with different movement strategies, (b) average vertical SPIF force with different movement strategies, (c) average vertical SPIF force with different movement strategies with respect to the forming depth, (d) average horizontal SPIF force with different movement strategies, (e) average vertical DPIF force with different movement strategies, (f) average horizontal DPIF force with different movement strategies, (g) vertical forming force with different rotational speeds, (h) average vertical forming force with different feed rates, (i) average horizontal forming force with different feed rates, (j) average vertical forming force with different sizes of the pitch, (k) average horizontal forming force with different sizes of the pitch, (l) vertical forming force for different materials, (m) horizontal forming force for different materials.