scholarly journals General Characteristics for Loading the Working Elements of Drilling and Milling Machines when Moving in the Clay Solution

2021 ◽  
Vol 23 (2) ◽  
pp. B97-B105
Author(s):  
Adil Kadyrov ◽  
Zhanara Zhunusbekova ◽  
Aleksandr Ganyukov ◽  
Irina Kadyrova ◽  
Aliya Kukesheva
Keyword(s):  
Mathematical Models ◽  
Dynamic Coefficient ◽  
Solution Flow ◽  
Feed Force ◽  
Working Element ◽  
Smooth Cylinder ◽  
Milling Machines ◽  
Working Bodies ◽  
Earthmoving Machines ◽  
Resistance Forces

The article is devoted to influence of the clay thixotropic solutions on the strength of resistance to movement of the earthmoving machines' working elements. The forces of resistance to the movement of a flat plate, a smooth cylinder and real working bodies in a clay solution for various modes of solution flow (bingamian, pseudo-laminar and turbulent) are established. Mathematical models of movement of the earthmoving machines working elements in clay solution are developed and investigated. Dynamics of the working element of an earthmoving machine movement in a clay solution is studied. Dependence of the feed force, torque and dynamic coefficient on the resistance forces, acting on the working body from the clay solution, is established.

scholarly journals Loads on cutter teeth for removing asphalt pavement

2019 ◽  
Vol 97 ◽  
pp. 06031
Author(s):  
Denis Furmanov ◽  
Vladimir Chizhov ◽  
Ivan Tyuremnov ◽  
Denis Troshin
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Technological Parameters ◽  
Cutting Resistance ◽  
Advantages And Disadvantages ◽  
Single Tooth ◽  
Milling Machines ◽  
Working Bodies ◽  
Resistance Forces

Machines and equipment for asphalt pavement milling are widely used throughout the world. With the growth of road construction, the demand for this class of machinery also rises. At the same time, the optimization of design and technological parameters of the milling machines is impossible without a comprehensive study of processes of milling asphalt concrete with the working elements of a cutter. The article provides a brief overview of different approaches to find out the loads on the working bodies of various machines, as well as indicates the advantages and disadvantages of these approaches. We describe the design of a pendulum stand used to study the processes of milling asphalt concrete with a single tooth cutter. We also describe the method of operation of such a stand. The design of the pendulum stand allows us to determine the cutting work, the average, and the instantaneous cutting forces. The work also provides the result of tests of cutting elements during their interaction with samples of asphalt concrete of different grades that are widely used in road construction. We also show the non-linear dependence of cutting resistance forces on the temperature and thickness of penetration of a cutting element. It is noted that working with a slight tooth penetration leads to low energy efficiency of the work process. It is also noted that temperature affects cutting resistance forces significantly less in asphalt concrete containing high amount of gravel.

Improvement of technical means for processing waste from logging operations for fuel chips in felling conditions

2017 ◽  
Author(s):  
Sergey Fokin
Keyword(s):  
Forest Fires ◽  
Hydraulic System ◽  
Economic Effect ◽  
Heat Energy ◽  
Wood Waste ◽  
Processing Waste ◽  
Operational Parameters ◽  
Additional Source ◽  
Milling Machines ◽  
Working Bodies

Currently, wood waste in the form of a dissected crown on the ground and the root fraction of the tree's biomass in the ground remain in felling areas, becoming potentially dangerous combustible materials in the event of forest fires, as well as obstacles to reforestation activities, and possible foci of infections. Shredding wood waste into wood chips will solve the problem of their disposal by using fuel chips as an additional source of heat energy. In the present work, the influence of design and operational parameters of milling machines with a modernized hydraulic system and equipped with active working bodies on the process of shredding wood waste is established. The annual economic effect from the introduction of the developed complex of wood waste shredding machines and economic indicators from the use of fuel chips are given. This publication is intended for undergraduates and postgraduates engaged in scientific research in the field of forestry mechanization.

scholarly journals EXPERIMENTAL DETERMINATION OF CUTTING RESISTANCE STRENGTH AT ASPHALT CONCRETE DESTRUCTION WITH A SINGLE CUTTING ELEMENT

2020 ◽  
Vol 17 (2) ◽  
pp. 196-207
Author(s):  
D. V. Furmanov ◽  
V. S. Chizhov ◽  
N. E. Lysakov
Keyword(s):  
Asphalt Concrete ◽  
Tangential Component ◽  
Operating Conditions ◽  
Recording Equipment ◽  
Drive Power ◽  
Unit Recording ◽  
Cutting Resistance ◽  
Operation Conditions ◽  
Working Element ◽  
Milling Machines

Introduction. The article is devoted to the research results on cutting resistance of a road asphalt concrete in the process of the removal of worn coatings by the working elements of milling machines. The relevance of the work is due to the occurring of new brands of asphalt concrete alongside with the use of new types of cutting elements, for which it is difficult to predict the load on the working element when solving the problems of designing new ones and substantiation the operating conditions of the current machines. The purpose. The objective of the study of the interaction of a single cutting element of a road mill with a material at the best fit of speed and geometric parameters of a cutting process with real machines is solved.Materials and methods. The experimental work was carried out by determining the tangential component of a cutting resistance strength, as well as the work of this strength on a pendulum desk using a unit recording equipment. Four different types of asphalt concrete were being destroyed. A two-factor experiment was conducted for each type of the material. The tangential components of a cutting resistance strength depending on the thickness of the cut chips and the temperature of the material were evaluated.Results. As a result of the experiment, the data were obtained that make it possible to reasonably determine the loads on the teeth of road milling machines, to determine a power capacity of the process and the drive power of the working element. It was found that the growth of the tangential component to a cutting resistance strength occurs quite intensively alongside with an increase in the thickness of the cut chips, only at the initial stages of the penetration of the cutter. With an increase in the thickness of the cut chips, the growth of the tangential component to a cutting resistance strength does not occur so intensively. In all cases the temperature of the material has an impact on the value of a cutting resistance strength, but this effect is less significant for asphalt concrete with a higher crushed stone content.Discussion and conclusion. The obtained data make it possible not only to determine the tangential strength to cutting resistance on the cutting elements of the working element of the milling machine, but also to find rational ways to place the cutting elements on the working element, as well as to determine the rational operation conditions of the current and new machines. This is possible when using the results in a mathematical model that describes the operation of the milling working element as a whole.Financial transparency: the authors have no financial interest in the presented materials or methods. There is no conflict of interest.

scholarly journals INVESTIGATION OF THE PROCESS OF INTERACTION BETWEEN ROOT AND AUGER SCREW

2020 ◽  
Vol 1 (37) ◽  
pp. 38
Author(s):  
S. Marinenko ◽  
O. Korol ◽  
O. Hurik
Keyword(s):  
Mathematical Models ◽  
Root Crop ◽  
Technological Processes ◽  
Technological Efficiency ◽  
Urgent Task ◽  
Working Bodies ◽  
Angle Of Reflection

Increasing the technological efficiency of root harvesting machines by developing and substantiating new technological processes for the operation of root crop heap cleaning systems is an urgent task. The purpose of the study is to develop theoretical mathematical models of the functioning of the working bodies of treatment systems. Mathematical models of the resulting velocity and the angle of reflection of the root crop from the surface of the auger screw, which is mounted above the working branch of the feed conveyor, were obtained.

scholarly journals Spatial reorientation of the carriage of a CNC lathe when reversing

2020 ◽  
Vol 329 ◽  
pp. 03053
Author(s):  
Alexander Denisenko
Keyword(s):  
Support Group ◽  
Cutting Forces ◽  
Traction Force ◽  
Cnc Lathe ◽  
Spatial Reorientation ◽  
Direction Of Movement ◽  
Working Bodies ◽  
Processing Errors ◽  
Resistance Forces ◽  
Level Of Agreement

The process of machining on CNC machines of parts of a complex profile with multi-pass shaping schemes is accompanied by multiple changes in the direction of movement of the working bodies (reverse) during cutting and at idle. In this case, the formation of processing errors associated with the spatial reorientation of the carriage during reversal is possible, the cause of which is the mismatch of the vector of the traction force acting along the axis of the lead screw and the resulting resistance forces associated with cutting forces and friction in the guides. Based on the analysis of the forces acting on the carriage, a design and mathematical model is proposed for guides with prismatic and flat guides. Approbation of the proposed calculation method showed a good level of agreement between the calculated and experimental results. The regularities of the influence of the cutting forces, the location of the center of gravity of the support group, its mass and speed after the reverse on the value of the spatial reorientation have been established.

scholarly journals Determination of dynamic properties of the caterpillar drive of hydraulic reclamation machines and the method of articulated attachment of the working body of the trenchless pipelayer

2021 ◽  
Vol 47 (4) ◽  
pp. 122-131
Author(s):  
T. G. Gasanov ◽  
E. Z. Batmanov ◽  
M. R. Guseynov ◽  
M. N. Nazhmudinova
Keyword(s):  
Automatic System ◽  
Dynamic Properties ◽  
Experimental Studies ◽  
System Operation ◽  
Factors Affecting ◽  
Main Factors ◽  
Working Bodies ◽  
Executive Mechanism ◽  
Earthmoving Machines

Objective. The objective of the study is to determine the requirements for various devices of hydraulic reclamation machines, which are widely used in the construction of canals and drains, to maintain a given slope, as well as the calculation of the executive mechanism that serves to eliminate the oscillating movement of the working body relative to the line of the specified slope.Methods. A mathematical description of the vibrations of the working body for caterpillar hydraulic reclamation machines with mounted working bodies is given.Results. The article presents the results of research to identify the main factors affecting the oscillations of the working body of caterpillar reclamation machines. As a result of theoretical and experimental studies, it was found that when a caterpillar machine with a rigid undercarriage crosses single and multiple irregularities, the movement of the cutting edge of the rigidly mounted working body is graphically depicted by sinusoidal curves. The obtained dependencies allow conducting calculations of the automatic system of maintaining the specified slope and establish the area of stable modes of system operation. A geometric method for optimizing the hinge linkage of the working body of trenchless pipelayer is presented.Conclusion. The proposed methods of improving the performance of caterpillar hydraulic reclamation machines with mounted working bodies when moving on uneven ground surfaces can be used to create a wide class of mounted earthmoving machines, both with passive and active working bodies.

scholarly journals Working process for installing snow melting plants with active working element

2020 ◽  
Vol 193 ◽  
pp. 01057
Author(s):  
Anatoly A. Serebrennikov ◽  
Andrey A. Plohov
Keyword(s):  
Physical Modeling ◽  
Operating Experience ◽  
Operating Conditions ◽  
Individual Factors ◽  
Snow Melting ◽  
Working Process ◽  
Factors Affecting ◽  
Working Element ◽  
Working Bodies ◽  
Dimensionless Similarity

Based on the operating experience analysis of snow melting plants and the proposed patent solutions for their improvement, a new design is developed. Operability of the new design, in which rotation of the working bodies is carried out under the influence of the supplied coolant’s pressure, is confirmed. The study of the working process is based on an experimental method based on physical modeling. The influence of individual factors affecting the intensity and efficiency and enabling to determine the dimensionless similarity equations, is studied. Based on the results obtained, a pilot plant is designed, created, and tested under real operating conditions.

scholarly journals IMPROVEMENT OF THE COLLECTOR OUTPUT DEVICE OF THE DISK SEPARATORS

2019 ◽  
Vol 19 (2) ◽  
pp. 48-50
Author(s):  
L. S. SOLDATENKO ◽  
I. OSTROVKYI
Keyword(s):  
High Performance ◽  
Small Scale ◽  
Input Device ◽  
Wild Oat ◽  
Cnc Milling ◽  
Technical Literature ◽  
Wheat Grains ◽  
Milling Machines ◽  
Oat Seeds ◽  
Working Bodies

Disk separators operate on the basis of selective removal of a short fraction grain from a mixture with longer ones, for example, darnel grains and similar impurities from a mixture of wheat grains; or wheat grains from a mixture of wild oat seeds and other longer waste particles. For this purpose, the working bodies of separators— cylinders or disks — are equipped with special cavities, so called “cells”, which location, shape and size correspond to the technological operation. In the flow lines of the grain cleaning workshops of high performance flour mills, predominantly, disk separators, which construction and productivity are well-known from the scientific and technical literature, are used. In recent decades, the improved, so-called small-scale disk separators for wild oat, for example, A9-УТО-6 and some others, have been created and become widely used. Their specialties include, in particular, the lack of interdisciplinary trays in the pre-configured prefabricated input device (i.e., they are characterized by the use of unblocked WUAs). Further improvement of an unblocked WUA is possible on the basis of “The grain mixture cleaning method", which involves the location of cells on the surface of the discs, which ensures that the short particles fall out of them with a compact beam at the same angle, regardless of the distance of the cell relative to the axis of rotation. Therefore, the casting model of the disc should receive a more complex construction, which, unlike the present, mainly manual technology, is expedient to use with modern CNC milling machines.

scholarly journals RELATIONSHIP OF THE TYPE OF WORKING BODY OF THE BRUSH CUTTER WITH THE POSSIBILITY OF CUTTING WOOD-SHRUB VEGETATION

2020 ◽  
Vol 8 (2) ◽  
pp. 12-16
Author(s):  
Mikhail Drapalyuk ◽  
Leonid Bukhtoyarov ◽  
A. Pridvorova
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Mathematical Models ◽  
Horizontal Plane ◽  
Point Of View ◽  
Cutting Process ◽  
Kinematics And Dynamics ◽  
Scientific Interest ◽  
Working Bodies ◽  
Relationship Of

To remove unwanted tree and shrub vegetation, it is necessary to use mechanized implements aggregated with traction means - tractors. The power consumption of the drive of these tools depends on their mass and the principles of the cutting process. Currently, mulchers, which are designed to grind felling residues with a diameter of tens of centimeters, remove shrubs with a diameter of up to several centimeters, which leads to unreasonably high costs for this type of work. The article studies the designs of frames and working bodies of brush cutters, which are a rotor rotating in a horizontal plane with a knife fixed on a flexible connection or hinge. On the basis of the structures, hypotheses have been put forward about the advisability of using the considered types of working bodies when cutting tree and shrub vegetation, taking into account its diameter. Using the presented connections between the types of working bodies and their ability to cut tree and shrub vegetation, it was revealed the possibility of developing narrowly focused mathematical models, which will reduce the energy consumption of hedge trimmers and increase their efficiency. The presented designs of rotors themselves are also insufficiently studied from the point of view of kinematics and dynamics of movement of their links, which is of certain scientific interest.

scholarly journals Development of effective construction and justification of parameters of the cleaner of fibrous material

2021 ◽  
Vol 304 ◽  
pp. 03031
Author(s):  
Anvar Djuraev ◽  
Ruzimurad Rosulov ◽  
Javlon Kholmirzaev ◽  
Husan Diyorov ◽  
Umid Berdimurodov
Keyword(s):  
Mathematical Models ◽  
Numerical Solution ◽  
Fibrous Material ◽  
General Scheme ◽  
Laws Of Motion ◽  
Working Bodies

This article provides a general scheme of the principle of operation of a fibrous material cleaner from coarse and fine litter. Based on the compilation of dynamic and mathematical models, its numerical solution, the regularities of the movement of the working bodies of the purifier are presented. Analyzes of the laws of motion and graphic dependencies substantiated the main parameters of the purifier. Recommendations are given for widespread use in fiber-cleaning production.

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