Designing the structures of discrete solid­alloy elements for broaching the holes of significant diameter based on the assessment of their strength

Nemyrovskyi, Yakiv; Shepelenko, Ihor; Posviatenko, Eduard; Tsekhanov, Yuri; Polotnyak, S. B.; Sardak, Sergii; Bandura, Valentyna; Paladiichuk, Yurii

doi:10.15587/1729-4061.2020.203524

Cited by 6 publications

(9 citation statements)

References 5 publications

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“…Сплав ВК15 після спікання досліджувався на міцність, на згин і твердість. Ці характеристики мали наступні значення: зг  1950 МПа; HRA  85 [7,8].…”

Section: рис 6 експериментальний стенд на базі токарного універсально...unclassified

“…Для визначення дійсної глибини контурної канавки рельєфу при відомій масі G стружки застосовуємо рівняння [8]:…”

Section: рис 9 експериментальний інструмент для дослідження процесу п...unclassified

“…де п -повне число обертів зуба рельєфоутворювального елемента; т -густина оброблюваного матеріалу. Величина радіального переміщення оброблюваної поверхні Ux на будь-якій дільниці хвилі позаконтактної деформації може бути знайдена як різниця глибини канавок макрорельєфу при розташуванні зуба за межами хвилі (h) і в зоні дії останньої (hx) [8,9].…”

Section: рис 9 експериментальний інструмент для дослідження процесу п...unclassified

“…Кут  нахилу передньої поверхні у цьому випадку визначається із залежності [8]: В першу чергу це стосується внутрішнього протягування, оскільки діаметр валика стружки є визначальним фактором для допустимого ступеня заповнення стружкової канавки протяжок. Наші дослідження, результати частини яких подано на рис.…”

Section: рис 9 експериментальний інструмент для дослідження процесу п...unclassified

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Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Veselovska

Paladiychuk

Telyatnuk

2022

Engineering, Energy, Transport Aic

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It is known that when processing plastic materials by cutting, chip grinding is a serious problem. The formation of a stable, strong draining chip is a sign of low machinability of the material of the part and requires the use of special means and methods that would ensure the separation of the chip or allowance that is cut. This issue is especially relevant in the case of cutting drawing as a low-speed process, which is characterized by intensive overgrowth and a high coefficient of chip shrinkage, and therefore the strength of the latter. Today, there are a number of original developments of several scientific schools, which implement the idea of preliminary division of the allowance during drawing by creating a network of technological chip-splitting grooves. The process of internal drawing, in particular drawing of round deep holes, must necessarily take place under conditions of forced chip separation or allowance. At the same time, the so-called transverse division of the chips, i.e., division along the perimeter of the hole, is usually carried out due to structural elements on the broach teeth and today is not too difficult a problem. However, there are certain reserves in this direction as well, in particular those related to increasing the stability of the tool. This article considered the technological function of the reliefs, which consists in the forced division of the cut allowance with contour grooves. An analysis of the advantages and disadvantages of the most common processes for obtaining round holes in hollow blanks and parts is carried out. The essence of the group (progressive, variable) stretching scheme is described. Typical combined extension tools are considered. Given formulas for calculating the dimensions of chip grooves. The first component р of the change in the diameter of the hole and the outer diameter of the workpiece after each of the combined drawing operations is characterized.

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Section: рис 6 експериментальний стенд на базі токарного універсально...unclassified

Section: рис 9 експериментальний інструмент для дослідження процесу п...unclassified

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Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Veselovska

Paladiychuk

Telyatnuk

2022

Engineering, Energy, Transport Aic

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“…Вологість, механічна структура ґрунту, швидкість відносного переміщення та інші фактори впливають на абразивне зношування робочих органів ґрунтообробних машин [3][4][5][6].…”

Section: рис 1 робочі органи ґрунтообробних машинunclassified

Restoration resource of working bodies of soil treatment machines by applying wear-resistant coatings

Paladiychuk¹,

Melnik²

2021

Tehnìka ta energetika

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Intensive soil compaction, which is caused by the use of modern powerful tractors with high weight and the presence of higher working speeds, and as a result reduces the service life of tillage equipment. Difficult weather conditions cause an increase in the load on the working bodies of tillage machines, with the wear of the surfaces of the working bodies of agricultural units. The article considers the problem of increasing the resource of the working bodies of tillage machines due to the application of wear-resistant coatings. The types of wear and the influence of abrasive materials on the working bodies of tillage machines are analyzed. Determined optimal materials and methods to increase the wear resistance of the working bodies of tillage machines. Features of formation of a metallization covering which is reflected in its structure and character of defects which can differ in the sizes, density, morphology and orientation are considered. The dependence of the properties of coatings on the material doping system is substantiated. Equipment and materials for coating are given. Taking into account the received information, conclusions are made and the analysis of technology of drawing wear-resistant coverings for increase of a resource of working bodies of tillage machines is carried out.

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Plasticity Studies During Deformation Under Conditions of Significant Negative Values of the Stiffness Coefficient of the Stress State

Shepelenko

Tsekhanov

Nemyrovskyi

et al. 2021

New Technologies, Development and Application IV

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Designing the structures of discrete solidalloy elements for broaching the holes of significant diameter based on the assessment of their strength

Cited by 6 publications

References 5 publications

Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Restoration resource of working bodies of soil treatment machines by applying wear-resistant coatings

Plasticity Studies During Deformation Under Conditions of Significant Negative Values of the Stiffness Coefficient of the Stress State

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Designing the structures of discrete solid­alloy elements for broaching the holes of significant diameter based on the assessment of their strength

Cited by 6 publications

References 5 publications

Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Research of the Microhardness of the Surface of a Cylindrical Part During Deformation

Restoration resource of working bodies of soil treatment machines by applying wear-resistant coatings

Plasticity Studies During Deformation Under Conditions of Significant Negative Values of the Stiffness Coefficient of the Stress State

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Product

Resources

About

Designing the structures of discrete solidalloy elements for broaching the holes of significant diameter based on the assessment of their strength