Design of hybrid machines for nonuniform motion production

Yuan, Zhe; Gilmartin, M. J.; Douglas, S.S.

doi:10.1243/095440605x16992

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…Yuan and others explored the two combined machines having seven links, two DOF linkage [10]. Ouyang et al proposed a five-link lever mechanism consisting of a five bar linkage, an AC CV motor and a frequency controller, an AC brushless servo motor and a servo amplifier with a gear transmission, a shift encoder, a flywheel and a belt [11].…”

Section: Literature Reviewmentioning

confidence: 99%

Kinematic analysis and synthesis of the lever mechanism of crank press stamping

Tuleshov

Merkibayeva

Akhmetova

2020

JMMCS

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Expanding technical and technological capabilities of forging and stamping machines and equipment can be carried out by introducing new designs of actuators with wide functionality. These features are provided by the crank lever mechanisms of the press. This article presents a kinematic analysis and synthesis of a six-lever mechanism for stamping a crank press with a forging feed mechanism. We propose an analytical method for kinematic analysis of the mechanism, which allowed us to implement a numerical calculation program in the integrated Maple environment. Methods of kinematic synthesis of the six-lever crank press mechanism based on the standardsquare approximation, as well as the synthesis of the four-lever crank-slide forging feed mechanism have been developed. All the required constant geometric parameters of the stamping mechanism are determined; as a result, the mechanism implements the specified law of motion of the working slider with high accuracy. The comparative analysis was carried out in the ASIAN-2014 environment.

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Section: Literature Reviewmentioning

confidence: 99%

Kinematic analysis and synthesis of the lever mechanism of crank press stamping

Tuleshov

Merkibayeva

Akhmetova

2020

JMMCS

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“…The link lengths inequality constraints are given in Eq. (7). S 0 is the point where r 5 , r 6 and r 4 are lined up in a straight line.…”

Section: Synthesis Of a Seven-bar Mechanismmentioning

confidence: 99%

“…Inverse kinematics is studied for hybrid driven 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. Their arrangement is called the slider hybrid mechanism.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Seven-bar Press Mechanism

Kütük

Artan

Dülger

2018

Teh. glas. (Online)

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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

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“…The constant speed motor and servomotor were combined by a differential gearbox, which subsequently drove the crank mechanism (Tokuz, 1992). Yuan et al (2005) investigated two different mechanisms whose DOF was two. Ouyang et al (2004) proposed a fivebar linkage mechanism, which consisted of a constant velocity alternating current motor and a speed controller, a brushless alternating current servomotor and a gear servo amplifier, a shift encoder, a flywheel, and a belt.…”

Section: Introductionmentioning

confidence: 99%

Kinematic synthesis method and eccentricity effects of a Stephenson mechanism

Tuleshov¹,

Halicioglu²,

Shadymanova³

et al. 2021

Mech. Sci.

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Abstract. When implementing the technological process on crank presses, it is necessary to provide a predetermined working cycle of the slider motion: fast lifting, dwell, and slow lowering. The cycle cannot be realized without controlling the motor. In addition, using controllable motors increases the manufacturing cost. Due to the geometric and kinematic capabilities of the mechanism, changing the kinematics of the working link is the best choice. Thanks to the use of the Stephenson II mechanism, the slider skew is eliminated due to the parallel connecting rods and the increased area of slider contact. This study presents a numerical method for kinematic synthesis of the Stephenson mechanism that has kinematic advantages. The method is based on mean square deviation which is the minimizing of an objective function. Thanks to the proposed synthesis method, approximate dwell movement can be performed when the slider is on the bottom dead center. In this study, values of the crank length and parallel connecting rods' lengths, angular coordinates of the crank and connecting rods, and the eccentricity of the guide slider relative to the crank rotation axis were obtained. It is observed that eccentricity affects the lower forward and higher backward speed of the slider. The kinematic results of the slider movement are comparatively presented in this article.

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Design of hybrid machines for nonuniform motion production

Cited by 8 publications

References 5 publications

Kinematic analysis and synthesis of the lever mechanism of crank press stamping

Kinematic analysis and synthesis of the lever mechanism of crank press stamping

Hybrid Seven-bar Press Mechanism

Kinematic synthesis method and eccentricity effects of a Stephenson mechanism

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