To the theory of mechanisms subfamilies

Fomin, Alexey; Dvornikov, L; Парамонов, М. Е.; Jahr, Andreas

doi:10.1088/1757-899x/124/1/012055

Cited by 9 publications

(2 citation statements)

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“…В связи с тем что по приводу кулачковый механизм является первым по отношению к кулисной группе, синтез начнем с него. В соответствии с работами [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] можно принять перемещения центра ролика по циклоиде с ходом толкателя Н = 25 мм; длину коромысла L = 60 мм; угол циклоиды β = 180°. Он был принят исходя из предположения, что период переменной угловой скорости месильных валов должен быть равным половине их полного оборота.…”

Section: методика исследованийunclassified

Synthesis of the drive mechanism of the continuous production machine

Podgornyj¹,

Kirillov²,

Skeeba³

et al. 2023

Metal Working and Material Science

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Introduction. Existing mixing devices operate at a constant angular velocity of the working body. During this process, there are zones in which there may be no movement of material, which leads to a decrease in the quality of the finished product. When the working body moves with a variable angular rate, the inertia forces, when changing its sign, contribute to the creation of conditions under which the mixture will lose contact with the blade and move to new levels of movement, and this helps to improve the quality and intensity of the mixing process. The purpose of the work is to improve the quality of the processed mixture on horizontal blade (kneading) machine. Methods. Theoretical studies are carried out using the basic provisions of the theory of machines and mechanisms, structural and parametric synthesis, kinematic analysis, mathematical and computer simulation. Results and discussion. In accordance with the proposed method, the synthesis of the cam-rocker mechanism is carried out, which made it possible to select the main dimensions for the cam mechanism: the minimum radius and center distance. For the synthesis of the rocker group, the parameters of the synthesized cam mechanism are used and, using the main parameters for the rocker group (the size of the input link, the angle of the second arm initial position and rocker centre line, equal to 90°). The rocker arm span angle is obtained equal to 103°. As a result of the kinematic calculation, it is found that the dwell time of the working shafts is within 80°. The quality of the mixture can be assessed by the angle of the stagnation zone, which is formed during the movement of granular material. Under static conditions, it is equal to 0.846°, and at variable angular rate — 0.550°. It is theoretically confirmed that inertial forces that change sign four times in one cycle will provide shaking and rebound of the mixed mass from the blades, which, in turn, will significantly improve the quality of the mixture.

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Section: методика исследованийunclassified

Synthesis of the drive mechanism of the continuous production machine

Podgornyj¹,

Kirillov²,

Skeeba³

et al. 2023

Metal Working and Material Science

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“…The design issue of such mechanisms is directly related to finding the ratio between the number of DoF of a designed system, the numbers and types of links and joints, as well as the number of general constraints imposed on a whole system. These parameters are considered in the universal formula of mobility [11], written below:…”

Section: Synthesis Of Kinematic Scheme Of Mixing Mechanismmentioning

confidence: 99%

Development of a Mixing Mechanism with a Complex Motion of the End-effector

Fomin¹,

Ivanov²

2019

SV-JME

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This study is focused on the development and analysis of a single-driven mixing mechanism, synthesized with a minimum number of links and joints. The end-effector of this mechanism is designed as a screw ending with a mixing element (blades) moving along a spatial trajectory. The end-effector is set between movable links in the kinematic chain of the mechanism. This allows increasing the working zone of the endeffector. The study provides kinematic analysis via an analytical method of coordinate transformations that have resulted in the detection of variable kinematic parameters (tilt angles and displacements in joints) depending on driving link rotation angle. Based on these results, the motion trajectory of the mixing element has been analytically determined and reproduced. Analytical findings have been verified by results of motion simulations. The presented mechanism is advisable to use for the preparation of various mixtures and levelling the concentrations and temperature of mixed substances. The mechanism can be used in the food, medical, chemical, and construction industries, as well as in agriculture.

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Structural and Kinematic Analysis of a Shaper Linkage with Four-Bar Assur Group

Fomin

Kiselev

2018

Proceedings of the 4th International Conference on Industrial Engineering

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To the theory of mechanisms subfamilies

Cited by 9 publications

References 0 publications

Synthesis of the drive mechanism of the continuous production machine

Synthesis of the drive mechanism of the continuous production machine

Development of a Mixing Mechanism with a Complex Motion of the End-effector

Structural and Kinematic Analysis of a Shaper Linkage with Four-Bar Assur Group

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