Kinematic synthesis method and eccentricity effects of a Stephenson mechanism

Tuleshov, Amandyk; Halicioglu, Recep; Shadymanova, Azhar; Kuatova, Moldir

doi:10.5194/ms-12-1-2021

Cited by 7 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kinematic (e.g., [20] and [21]), kinetostatic (e.g., [22]) and dynamic analysis (e.g., [23] and [24]), synthesis studies (e.g., [20] and [25]) and different optimization types and techniques (e.g., [26] to [28]) were carried out for the inversor mechanisms. For example, a numerical method based on the meansquare minimization of the objective function [29] can be used for the kinematic synthesis of the Stephenson mechanism. Other modern methods can also be used to optimize these planar mechanisms (e.g., the genetic algorithm, approached in [28]).…”

Section: Introductionmentioning

confidence: 99%

Inverse Curves - Research on Two Quondam Inversor Mechanisms

Duță¹,

Popescu²,

Geonea³

et al. 2023

sv-jme

View full text Add to dashboard Cite

The field of research considered in this work is that of mechanisms generating inverse curves. We were motivated to approach this field, proposing variants of mechanisms based on Artobolevsky’s inversor, in blocking conditions, due to the lack of recent applications related to inversor mechanisms that draw curves other than straight lines. Based on Crawford’s inversor, Artobolevsky’s inversor is structurally and kinematically analysed in what follows. Hence, we carried out the kinematic analysis and simulation of four inversor mechanisms derived from Artobolevsky’s inversor, which draw different initial curves (a circle, a straight line, an ellipse and an Archimedes’ spiral) were performed. Inverse curves were generated under limited operating conditions due to geometrical dimensions and kinematic parameters. Given the researchers’ increasing interest in the development of applications related to inversor mechanisms (in fields such as: robotics, machine tools, visual arts and symbolic languages), as well as expanding databases of planar and spatial mechanisms, it is suggested that there is a need to create new mechanisms similar to those studied in this paper and to analyse their mode of operation.

show abstract

Section: Introductionmentioning

confidence: 99%

Inverse Curves - Research on Two Quondam Inversor Mechanisms

Duță¹,

Popescu²,

Geonea³

et al. 2023

sv-jme

View full text Add to dashboard Cite

show abstract

“…In the works [11,12] a crank-slide double-rod mechanism of Stephenson II is proposed, which, in comparison with the existing operating mechanism of the crank press, has broader functionality. The structure of such mechanisms makes it possible to realize the exact working link dwell [13].…”

Section: Introduction and Review Of Sourcesmentioning

confidence: 99%

Numerical Experiment and Design of a Two-Rod Crank Knee Press with an Internal Layout of the Motor Drive

Tuleshov,

Akhmetova,

Kuatova

et al. 2023

Applied Sciences

Self Cite

View full text Add to dashboard Cite

In crank presses, an important role is played by the presence of actuators with dwell, in which, with continuous movement of the input links, the output working link remains stationary at some part of the work. The use of a high-class structural group (fourth class) expands the functionality of the crank press, including it can ensure the link dwell of the working link on a given section of movement during the required period of time. As a result of the conducted numerical research, four variants of actuators of the crank knee press were designed. Due to the rational choice of the positions of racks and crosshead guide, the best layout of the dimensions of the press mechanism has been achieved. Changing the coordinates of the racks accordingly allows for designing a mechanism with upper or lower dwells of the working links. The duration of the dwell of the working link (slider) can be adjusted by selecting the distance between the racks with rotational pairs and a crosshead guide of the mechanism. All this is shown on the basis of a numerical experiment based on kinematic analysis. In addition, the proposed structure of the mechanism makes it possible to ensure the exact link dwell, which cannot be achieved due to the well-known knee presses based on the second-class mechanism.

show abstract

“…In order to better characterize its structural features, it is called Crank-Triangular Linkage-Elbow mechanism (CTLE) in this paper. CTLE has attracted extensive attention from researchers and manufacturers of servo presses owing to its good kinematic and dynamic characteristics [4,5,[9][10][11][12]. Especially, CTLE has a high mechanical advantage and low and steady speed in S n , meeting the requirements for mechanical servo press [1,11].…”

Section: Introductionmentioning

confidence: 99%

“…It is observed that eccentricity of Stephenson mechanism affects the lower forward and higher backward speed of the slider. The literature only provides numerical analysis of kinematics, lacking dynamic analysis [10]. In summary, the general approach to solve the optimization problem of planar linkage system is:…”

Section: Introductionmentioning

confidence: 99%

Decomposition analysis and peak stagger design for Crank-triangular linkage-elbow mechanism of mechanical servo presses

Sun

Liang-mo

et al. 2021

Mechanics & Industry

View full text Add to dashboard Cite

High mechanical advantage as well as low and steady slide speed within the working stroke Sn are the fundamental requirements for the working mechanism of servo-mechanical press. Currently, the Crank-Triangular Linkage-Elbow (CTLE) mechanism has attracted more and more attention from researchers and manufacturers of servo presses. This paper presents a new analysis and design method of CTLE. The mechanism is decomposed into two sub-units: crank and triangular-linkage elbow, followed by the kinematic and force analysis of each sub-unit. The influences of each structural parameter on the working performance are obtained and can be used as the basis for preliminary design. Through the offset design, the mechanical advantage peaks of the two units, MA1max and MA2max, do not occur at the same time: MA1max is located near Sn, while MA2max is just at BDC (Bottom Dead Center). Because the mechanical advantage of the whole mechanism is the product of the two subunits, the designed mechanism can obtain high and steady mechanical advantage together with low and steady slide speed within Sn. After preliminary design, the scheme can be further modified by numerical simulation and optimization. Hence the design efficiency can be improved.

show abstract

Kinematic synthesis method and eccentricity effects of a Stephenson mechanism

Cited by 7 publications

References 18 publications

Inverse Curves - Research on Two Quondam Inversor Mechanisms

Inverse Curves - Research on Two Quondam Inversor Mechanisms

Numerical Experiment and Design of a Two-Rod Crank Knee Press with an Internal Layout of the Motor Drive

Decomposition analysis and peak stagger design for Crank-triangular linkage-elbow mechanism of mechanical servo presses

Contact Info

Product

Resources

About