DETERMINATION OF THE CRITICAL DEPTH OF SOIL CUTTING FOR EARTHMOVING MACHINES

The development of civil and industrial construction and the growing trend of construction of underground communications have led to an increase in the volume of work on the laying of gas and oil pipelines, water mains, sewerage systems, power cables and communication cables. Much of the excavation work in the construction of these communications is performed by trench excavators.

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Determination of Critical Depth of Cutting Soil by Cutters with Building Excavators

Lecture Notes in Civil Engineering - Proceedings of the 2nd International Conference on Building Innovations ◽

10.1007/978-3-030-42939-3_62 ◽

2020 ◽

pp. 631-640

Author(s):

S. V. Kravets ◽

O. P. Lukianchuk ◽

O. V. Kosiak ◽

O. O. Gaponov

Keyword(s):

Critical Depth

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STUDY OF THE IMPACT OF ANTIFRICTION LAYERS ON SOIL CUTTING AND DIGGING DONE BY EARTHMOVING MACHINES

Вестник Белорусско-Российского университета ◽

10.53078/20778481_2014_3_6 ◽

2014 ◽

pp. 6-13

Author(s):

Yevgeny Ivanovich Berestov ◽

Aliasghar Hassan Afkhami Alishah

Keyword(s):

Soil Cutting ◽

The Impact ◽

Earthmoving Machines

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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

Herald of Dagestan State Technical University Technical Sciences ◽

10.21822/2073-6185-2020-47-4-122-131 ◽

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.

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A New Experimental Approach to Determination of Critical Depth in High Speed Machining of Soda-Lime Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.576.23 ◽

2012 ◽

Vol 576 ◽

pp. 23-27

Author(s):

M.A. Mahmud ◽

A.K.M. Nurul Amin ◽

M.D. Arif

Keyword(s):

High Speed ◽

End Milling ◽

Soda Lime ◽

Depth Of Cut ◽

Soda Lime Glass ◽

Critical Depth ◽

Good Surface ◽

Transition Depth ◽

Good Surface Finish

Soda-Lime glass is a very hard and brittle material which is commonly used as window panels and many other common applications. Due to its low fracture toughness it is very difficult to machine and obtain good surface finish under nornal cutting conditions. Hence, machining has to be done in ways to avoid brittle fracture on the finished machined surface. Such machining is only possible under ductile mode machining conditions when the removal of material is performed in the plastic state. However, ductile mode machining requires that during machining the temperature generated in the cutting zone in the working temperature range of glass to avoid crack formation during machining. This makes all types of machining of glass an extremely challenging affair, given the current state and mode of mechanical machining. This research paper elucidates the results of an experimental study for determination of critical depth of cut as a function of cutting parameters in high speed end milling of soda-lime glass. The critical depth is defined as the depth of cut at which crack formation the material is initiated for a given high speed attachment. In determining the critical depth as well as the ductile brittle transition depth, machining was performed on a tapered surface. Vibration signals from an accelerometer in time domain (amplitude vs. time display) and the surface characteristics were used in identifying the critical depth of cut. The new method has been found to be useful in online determination of the critical depth, as well as the brittle-ductile transition depth, for generating crack-free surfaces with good surface finish in high speed end milling of soda lime glass.

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The Determination of Soil Cutting Force Applied with Bucketless Bottom Rotor with Account of Speed and Runout

Lecture Notes in Civil Engineering - Transportation Soil Engineering in Cold Regions, Volume 1 ◽

10.1007/978-981-15-0450-1_50 ◽

2020 ◽

pp. 479-486

Author(s):

Serik N. Nurakov ◽

T. Awwad ◽

A. Kaliyev ◽

A. S. Tulebekova

Keyword(s):

Cutting Force ◽

Soil Cutting

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Establishing the technical performance of the chain excavator with cutters working in conditions critical deep cutting of soils

Transfer of innovative technologies ◽

10.32347/tit2141.0210 ◽

2021 ◽

pp. 78-81

Author(s):

Alexey Goponov

Keyword(s):

Practical Implementation ◽

Critical Depth ◽

Research Results ◽

Calculated Dependence ◽

Technical Performance ◽

Technical Productivity

The calculated dependence for determination of technical productivity of the chain excavator with the cutters working in the conditions of critical depth cutting of soils is offered. An assessment is given for the practical implementation of the research results.

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Method of calculating the parameters of the scraper working equipment of the trench excavator based on critical deep blocked soil cutting

Gіrnichі budіvelnі dorozhnі ta melіorativnі mashini ◽

10.32347/gbdmm2020.96.0101 ◽

2020 ◽

pp. 5-12

Author(s):

Sviatoslav Kravets ◽

Oleksandr Lukyanchuk ◽

Vladimir Suponyev ◽

Olexey Gaponov

Keyword(s):

Energy Efficient ◽

Energy Intensity ◽

Mechanical Characteristics ◽

Cutting Speed ◽

Critical Depth ◽

Modes Of Operation ◽

Increase Productivity ◽

Soil Cutting ◽

Selection Of ◽

Physical And Mechanical Characteristics

The article presents a method of calculating the parameters of the scraper working equipment of a trench excavator that performs critical depth cutting: critical depth for its cutters, number of cutting lines, pitch of cutters, height of scrapers, cutting speed, working speed, length of plowshares of cutters, necessary effort of cutting of soil, power to drive the working equipment and movement, power selection of the base machine. Methodology/approach. To solve these problems, analytical methods were used to study the parameters of multi-scraper excavators that perform critical depth cutting of soils. Findings. The developed technique allows to create energy-efficient working equipment and to determine its critical-depth modes of operation, which make it possible to increase productivity and reduce the energy consumption of multi-scraper chain trench excavators that carry out blocked cutting of soils. Research limitations/implication. The initial data for the calculation are: the width of the cutters, their cutting angle, the maximum depth of the trench, the width of the trench, the physical and mechanical characteristics of the soil. Originality/value. Managed to achieve the prerequisites for reducing the energy intensity of soil development scraper chain excavators based on critical depth cutting of soils.

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