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Unformatted text preview: smaller and the final bend radius is larger than before (Kalpakjian, Schmid). Springback factor ; K s is defined as 1 ) / 2 ( 1 ) / 2 ( + + = = t R t R K f i i f s Equation 2: Springback factor f : the final radius i : the initial radius i R : the initial bend radius f R : the final bend radius bika ilem yaplacak burda When it comes to calculating bending forces; it can be assumed that the process simple bending of a rectangular beam. If friction is excluded the formula for maximum bending force , F max is W Lt UTS k F 2 max ) ( : Equation 3: Maximum bending force k : constant (1.2 1.33 for a V die) UTS : ultimate tensile strength L : total length of the bend edge t : thickness W : width of the die opening REFERENCE a eklenecek Kalpakjian S; Schmid S R; Manufacturing Processes for Engineering Materials , Pearson Education Inc, 2003 Resim...
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- Fall '12