Investigation of the dynamic bending moment transmitted to the forging manipulator due to press motion

다국어 초록 (Multilingual Abstract)

The bending moment transmitted to the forging manipulator due to press motion during metal forming process is investigated. The dynamic model of the forging manipulator system is established, including the manipulator and the workpiece by using Lagrange equation.

The system is modeled as an Euler-Bernoulli beam with spring-mass at the sliding end, which experiences a transient vibration due to displacement excitation. The Winkler foundation model is used to simulate the rotational constraint of the forging dies on the workpiece because of the surface contact. The numerical results are compared with the LS-DYNA simulations, and a good prediction on the bending moment could be obtained with the comparatively simple proposed model. The results indicate that the press position where the forging dies work along the workpiece plays a crucial role for the dynamic bending moment. To further investigate the dynamic effects due to the press motion, the influence of clamp mass of the manipulator is also examined.

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