Core Drilling of Fiber Reinforced Materials using Abrasive Tools

Biermann, Dirk; Bathe, Timo; Rautert, Christian

doi:10.1016/j.procir.2017.03.304

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…Твердість матеріалу впливає на d відб (48%), а на його глибину (27%). Керовані фактори (Р) і (а) впливають на d відб і становить до 57% і 72% відповідно [5,8].…”

Section: отвориunclassified

“…Визначимо залежності позиційних відхилень для агрегатних верстатів в логарифмічному вигляді: ω В = 1,534 -0,025lgd і + 0,357 lgНВ -0,185 lgl ВТ + + 0,206 lgl Х + 0,202 lgТ S1 ( 7 ) ω О = 2,71 -0,041 lgd і + 0,153 lgНВ -0,117 lgl ВТ + + 0,066 lgl Х + 0,198 lgТ S1 ( 8 ) Потенціюючи вирази (7) і (8), отримаємо залежності для розрахунку полів розсіювання: Порівнюючи показники ступенів математичних моделей в формулах (5) і (6), при змінюваних факторах L Х , НВ, l ВТ і d і з результатами, отриманими в імітаційних моделях (9) і (10) можна встановити, що дуже схожі між собою і, практично, співпадають. Отже введення в модель додаткового фактора, як зазору Т S1 не вплинуло на величини полів розсіювання координованих розмірів при виготовленні отворів на малих агрегатних верстатах.…”

Section: обговорення результатівunclassified

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Estimation of Accuracy of Coordinated Small Diameter Holes With Cutting Tool Direction

Burdeina¹,

Hrinchenko²,

Artiukh³

et al. 2021

Вісник НТУ "ХПІ"

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The dimensional analysis of the initial parameters of the coordinated dimensions of the holes is presented. Issues related to the assessment of the accuracy of the location of the surfaces of deep holes are considered. The influence of various technological factors on the magnitude of scattering of coordinated dimensions is studied. Experimental studies using experimental design methodology, which was used for sample preparations 45 steel, cast iron SCH15, aluminum alloys. Factors such as the cutting angle, the hardness of the workpiece, the cutting force and their effect on the diameter of the impression and its depth were studied. As a result of the experiments, a slight effect of the drilling force on the diameter and depth of the impression was found. However, it was found that the angle of the core leads to a directly proportional increase in the diameter of the imprint and inversely affects its depth. The hardness of the material has a more significant effect on the diameter of the imprint than on its depth. The total influence of controlled factors significantly affects the diameter of the imprint. Minimum core drilling angles are proposed for some materials. A mathematical model of the accuracy of machining coordinated holes is proposed on the basis of estimating the coefficients of the regression equation and finding the required mathematical models of the scattering fields of dimensions and deviations. As factors that vary during the drilling of coordinated holes, were taken: the length of the conductor sleeve, the departure of the tool, the hardness of the workpiece, the diameter of the tool. It is found that with increasing tool diameter and guide sleeve length decreases the amount of dimensional scattering from the base and positional deviations, and increasing tool departure and improving the physical and mechanical properties of the workpiece increase the size of the size scattering field from the base and positional deviation. An additional factor was introduced: the gap in the combination between the cutting tool and the conductor sleeve and obtained mathematical dependences of the influence of factors on dimensional accuracy when machining deep holes with the direction of the cutting tool. It is shown that the introduction of an additional factor - the gap, did not change the essence of the process of errors on small aggregate machines, and the change in diameters does not lead to a significant increase in scattering fields.

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Section: отвориunclassified

Section: обговорення результатівunclassified

Estimation of Accuracy of Coordinated Small Diameter Holes With Cutting Tool Direction

Burdeina¹,

Hrinchenko²,

Artiukh³

et al. 2021

Вісник НТУ "ХПІ"

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“…The in uence of drilling parameters on the drilling force, drilling temperature, hole diameter and hole surface quality were studied in the drilling of CFRP/Al with double point angles drill by Wang et al [5]. Khashaba [6], Jain [7], Melentiev [8], Ha [9], Qiu [10], Biermann [11] and Kolesnyk [12] had conducted similar research with different tools and obtained similar results. It is found that in CFRP drilling, cutting parameters have a noticeable impact on thrust force, torque and machining quality.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation On Machining Performance During Orbital Drilling of CFRP

Kong

Gao

Lü

et al. 2021

Preprint

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As the most promising CFRP hole making method, orbital drilling is widely concerned. This paper aims to understand the influence of the cutting parameters, tool diameters and ratio between milling and drilling (Rm&d) on thrust force, cutting temperature, tool wear and machining quality in CFRP orbital drilling. The effects of cutting parameters on thrust force and cutting temperature were studied by orthogonal experiments, and experiments were performed to investigate the variations of tool diameters, ratio between drilling and milling on thrust force, cutting temperature, tool wear and machining quality. The experimental results show that the tangential feed rate has no apparent effects on thrust force, but it appreciably impacts on the cutting temperature. The selection of tool diameter and the Rm&d has specific influence on tool wear, machining quality and cutting temperature. The result is helpful for selecting cutting parameters and tool diameters for high quality holes machining in CFRP orbital drilling.

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“…They have been generally used in turning/grinding operations in a wide range of applications in the automotive, optical [8] and communication industry as well as in medical and life science in order to obtain ultraprecision components. Nowadays, electroplated milling tools are studied for drilling [9] and milling [10] applications. An electroplated milling tool consists of a steel core and a single or multi-layer of abrasive grains in the cutting area.…”

Section: Introductionmentioning

confidence: 99%

Definition of tailor made cutting tools for machining of complex surfaces based on final surface shape

Escudero

Lucio

González

et al. 2020

2020 International Conference on Mathematics and Computers in Science and Engineering (MACISE)

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In this work a design methodology to define the best geometry of cutting tool for complex surfaces is defined, being based on the final part surface geometry. The manufacture of components with tailor made shaped tools, based on algorithm calculation and adapted to the geometry of the final piece surface, reduces manufacturing time and maintains piece quality in comparison with traditional cutting tools. Cutting tools are usually cylindrical (end mills) or ball-end mills. With mathematical algorithms can be defined diamond & CBN electroplated form tools, multi-tooth endmills, abrasive grinding tools and so on. The approach here presented can enable the production of tools for manufacturing process such as Super Abrasive Machining (SAM) and Flank milling strategies. Comparison between standard tools and traditional machining processes versus custom-shaped tools was studied in terms of process time. Final applications are numerous, such as, integral blade rotors, spiral bevel gears, blisks and impellers, complex screws, and others.

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Core Drilling of Fiber Reinforced Materials using Abrasive Tools

Cited by 10 publications

References 23 publications

Estimation of Accuracy of Coordinated Small Diameter Holes With Cutting Tool Direction

Estimation of Accuracy of Coordinated Small Diameter Holes With Cutting Tool Direction

Experimental Investigation On Machining Performance During Orbital Drilling of CFRP

Definition of tailor made cutting tools for machining of complex surfaces based on final surface shape

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