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Thickness Addition Forming on the Flange Part by Press Working
Published May 19, 2010 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
In the study, we developed the thickness addition method in press working process that was compressive forming by clamping both sides of sheet material by inclined dies. A circular type of blank specimen was employed on the forming test in order to restrain the material's moving in a transverse direction. The thickness addition could be obtained on JSH270D and JSH440W blank sheets. The compressive force to perpendicular direction of the blank was one of the most important forming parameters on optimal forming condition. On the optimal condition, the ratio of the formed work pierce thickness to the blank's thickness was 185-195%. The material flow in the formed products was observed with etching technique. The fiber flow on JSH270D and JSH440W showed the sigmoidal type curvature of internal material. The grains in the material were deformed uniformly on the optimal forming condition. The thickness addition and the work hardening of the formed material can eliminate the welding process and the heat treatment.