Dynamics of Mechanical Press Drive

Yavtushenko, A. V.; Yavtushenko, Ganna; Проценко, В. М.; Bondarenko, Yu; Vasilchenko, T.

doi:10.1109/mees.2019.8896522

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…During mechanical pressing, the slidercrank mechanism converts the motor rotations into the linear reciprocating motions of the slider. In this way, the raw materials are molded and machined into various semi-finished products or finished products [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Multi-Goal Driven Optimization of the Beam in Straight-Side Two-Point Press

Yang¹

2020

JESA

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Traditionally, the beams of mechanical presses are designed and optimized empirically. The empirical design cannot satisfy the increasingly strict requirements on product performance, quality, cost and appearance. This paper attempts to develop a lightweight design for the beam of a straight-side two-point press without sacrificing the strength and stiffness of the structure, thus saving materials and production cost. Our design was mainly developed through multi-goal-driven optimization (multi-GDO) based on ANSYS Workbench. Firstly, the finite-element model of the target beam was established with the aid of ANSYS Workbench and SolidWorks, followed by the static structural analysis on the beam structure. Next, the main dimensional parameters of the beam were subjected to sensitivity analysis, revealing the key factors affecting the beam dimensions. Finally, the multi-objective genetic algorithm (MOGA) was called to optimize the main design variables, and finalize the lightweight design of the beam. The lightweight design was found to greatly save the material and production cost. The research results lay the theoretical basis for beam improvement, and provide a reference for the optimization of other parts of mechanical press and other molding and forging machines.

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Section: Introductionmentioning

confidence: 99%

Multi-Goal Driven Optimization of the Beam in Straight-Side Two-Point Press

Yang¹

2020

JESA

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“…The planetary drive has been increasingly used in crank press activation systems. The use of planetary mechanisms in the drives of the press allows for an unchanged number of strokes of the press to reduce several times the energy consu mption for activation [1], to increase the number of revolutions of the flywheel, which leads to a significant reduction in its moment of inertia and, consequently, in size and weight [2]. Since the friction units of all planetary gearboxes act as brakes, the working conditions of which are more favorable to the friction clutches, which leads to an increase in the service life of friction elements, the cycle between repairs of the press and, subsequently, improves the press reliability and durability [3].…”

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confidence: 99%

“…The simplified dependencies for the main energyconsumption and dynamic parameters of the drive are presented in [5]. The duration of the switching periods t 1v is determined by the formula:…”

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The Influence of Configuration Parameters of the Planetary Drive of Crank Presses on its Dynamic and Energy-Consumption Characteristics

2023

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Introduction. The planetary drive has been widely found in the activation systems of crank presses as it improves working conditions of friction units and reduces press metal consumption and energy consumption.Problem Statement. For studying the planetary motion of its main parts, it is advisable to consider its operation as four periods characterized by different patterns of changes in external loads and, consequently, different patterns of motion of core parts. The periods between switching the brakes when one link has not stopped, while other one starts moving is of the greatest interest. The problem of dynamic and energy-consumption parameters of the drive in transient conditions still remain a little open.Purpose. The purpose of this research is to qualitatively assess the influence of configuration parameters on the dynamics of the processes of switching and stopping the planetary drive.Material and Methods. The parameters of the experimental pilot plant, a model planetary drive with a nominal load of 400 kN, have been calculated. The minimum speed of the central gear has been estimated depending on the moments of inertia of the leading mass and the outer gear. The obtained dependences have been processed with the use of a standard mathematical apparatus.Results. It has been found that the energy-consumption and dynamic parameters of the drive are significantly influenced by such characteristics as moments of inertia and braking moments, while decreasing angular velocity of the drive flywheel does not depend on the moments of inertia of the stopped links. The rate of braking processes is determined by the elastic properties of the friction materials and the parameters of the brake springs, not by the parameters of compressed air outflow.Conclusions. The obtained analytical and graphical dependences have allowed not only qualitative, but also quantitative assessment of the influence of the parameters on the dynamics of processes. These recommendations can be used at the design stage, to select the optimal parameters of the drive with the predicted properties.

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