Abstract

In this study, strength and durability are investigated using structural and vibration analyses on models 1 and 2 of a press in common use. Model 1 has a structure in which a punch is applied from the upper part to the lower part; however, model 2 a structure in which a punch is applied from the lower part to the upper part. Maximum displacements of models 1 and 2 are 0.018184 mm and 0.025498 mm, respectively. Maximum equivalent stresses of models 1 and 2 are 14.144 MPa and 18.58 MPa respectively. Maximum displacements are shown for the punches of both models; model 1 has less deformation than model 2. Model 1 has more durability than model 2, as determined by an investigation of the structural strength. Using natural frequency analysis, model 1 was found to have maximum deformation in the upper part of punch. Mode1 2 has its maximum deformation in the column part of the body and the upper part of the fixed pin. Using harmonic stress analysis, the maximum deformations were found on the punch part and column part of the body in the cases of models 1 and 2, respectively. As the maximum total deformation and equivalent stress in the case of model 2 are shown to become 40 times those values of model 1, the vibration durability of model 2 can be seen to be weaker than that of model 1.

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