Hybrid Seven-bar Press Mechanism

M Erkan Kütük,L Canan Dülger

doi:10.31803/tg-20180203202102

M Erkan Kütük, L Canan Dülger

Open Access

https://doi.org/10.31803/tg-20180203202102

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Abstract

An optimization study with kinetostatic analysis is performed on hybrid seven-bar press mechanism. This study is based on previous studies performed on planar hybrid seven-bar linkage. Dimensional synthesis is performed, and optimum link lengths for the mechanism are found. Optimization study is performed by using genetic algorithm (GA). Genetic Algorithm Toolbox is used with Optimization Toolbox in MATLAB®. The design variables and the constraints are used during design optimization. The objective function is determined and eight precision points are used. A seven-bar linkage system with two degrees of freedom is chosen as an example. Metal stamping operation with a dwell is taken as the case study. Having completed optimization, the kinetostatic analysis is performed. All forces on the links and the crank torques are calculated on the hybrid system with the optimized link lengths

Highlights

Many industrial applications are potentially used as hybrid mechanisms
A hybrid seven-bar press mechanism is explained with link optimization
Genetic algorithm is applied for finding optimum link lengths for the mechanism

Summary

INTRODUCTION

Many industrial applications are potentially used as hybrid mechanisms. Some of them can be used for cutting, printing, and stamping. Some of them are taken as the optimization methods for synthesis of a seven-bar press mechanism. Z. Yuan et al [7] have studied two different hybrid mechanisms to get an output motion by minimizing torque and power from the servo motor. Li and Zhang [9] have used a seven-bar mechanism press with hybrid driven case for deep drawing. Kütük [10] has performed a study on inverse kinematics issues on hybrid driven seven-bar mechanism with motion design for press application. Payvandy [11] have presented a study on the dimensional synthesis using different heuristic optimization techniques: GA, PSO and DE. A hybrid press mechanism is given a detailed motion design procedure in Kütük’s study [1]. M. Erkan KÜTÜK et al.: HYBRID SEVEN-BAR PRESS MECHANISM: LINK OPTIMIZATION AND KINETOSTATIC ANALYSIS.

Synthesis of a Seven-Bar Mechanism

An Example Analysis

CONCLUSION