Forming the geometric accuracy and roughness of holes when drilling aircraft structures made from polymeric composite materials

Maiorova, Kateryna; Vorobiov, Iurii; Andrieiev, Oleksii; Lupkin, Borys; Sikulskiy, Valeriy

doi:10.15587/1729-4061.2022.254555

Cited by 10 publications

(12 citation statements)

References 11 publications

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“…The study of shaping geometric precision, roughness, taperness, and cylindricity of holes in PCM is based on the construction of a kinematic scheme of shaping of drilling zones along the surface of the hole. This scheme is constructed in accordance with the adopted kinematic scheme of interaction of the cutting edges of the drill with the fibers of the PCM filler across the drilling [22]. Fig.…”

Section: The Study Subjectmentioning

confidence: 99%

“…When tensile, normal cutting forces N have the highest values compared to adhesion and tangential forces (N ≥ P adh ). 1 -cutting wedge; 2 -fiber; 3 -matrix; Px, Ru, N -external cutting forces, MPa; P adh , τ -adhesion and adhesion forces between the fiber and the matrix, MPa; d -fiber diameter, mm; V -cutting wedge speed, m/min [22] In the zones of angles j from 90° to 180° and j from 270° to 360°, the normal force N coincides with the force component Px and acts on the displacement of the fiber. Due to the thermal factor of deformation that occurs in the contact zone, the filler fibers are «pulled» from the matrix.…”

Section: The Study Subjectmentioning

confidence: 99%

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Formation of the quality of holes obtained by drilling in aviation structures made from polymer composite materials

Maiorova

Andrieiev²,

Lupkin

et al. 2023

EEJET

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The subject of this study is the quality indicators (geometric accuracy, roughness, cylindricity and taperness) of holes obtained by drilling in aircraft structures (AS) made of polymeric composite materials (PCM). The quality indicators of holes in AS made from PCM were studied by using kinematic schemes across and along the direction of drilling. A kinematic scheme of formation of the predicted surface roughness of the hole in AS made from PCM has been built. The calculation of the predicted roughness of PCM holes taking into account the geometry of the drill and drilling modes has been proposed. Experimental studies have been implemented to establish the parameters of predicted roughness, geometric accuracy, taperness, as well as deviations from cylindricity. The methods used were the method of expert assessments and experimental studies of quality indicators of PCM openings. The following results were obtained: the roughness in full-scale experiments turned out to be lower than the theoretical calculated values with a difference of not more than 10...15 %. It was found that roughness, taperness, deviations from geometric precision and cylindricity differ in characteristic rotation zones of the drill from 0° to 360° and depend on the drilling parameters and PCM properties. It was found that the deviation from the hole cylindricity is affected by the shrinkage of the material. The appearance of ovality in the holes of prototypes was established. The results of experimental studies of measurements of hole diameters to establish deviations from cylindricity, geometric accuracy, and taperness met the production requirements for the accuracy of their manufacture. For geometric precision and deviation from cylindricity, the results ranged from 7 to 12 IT grades, and for taperness, from 0.083 to 0.28 % per a hole in AS made from PCM and 9–10 IT grades

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Section: The Study Subjectmentioning

confidence: 99%

Section: The Study Subjectmentioning

confidence: 99%

Formation of the quality of holes obtained by drilling in aviation structures made from polymer composite materials

Maiorova

Andrieiev²,

Lupkin

et al. 2023

EEJET

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“…Серед методів механічної обробленні домінуюче місце займає оброблення різанням. При цьому, з точки зору проблеми забезпечення якості необхідно оцінювати не тільки точність розмірів, форм, параметрів мікрорельєфу, але і участь при утворенні ліквідів на поверхнях деталей у вигляді мікрозадирків і мікрочастин як для металевих матеріалів, так і для неметалевих [8,9].…”

Section: рис 1 класифікація фізико-хімічних властивостей і геометричн...unclassified

Формування Вимог До Інформаційного Супроводу Виробництва Аерокосмічних Виробів Для Забезпечення Їх Якості

Bychkov

Seleznova

Maiorova

et al. 2022

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The aim of this study is informational support of the aerospace object production at the stages of their lifecycle. The purpose is to provide the necessary parameters of the aerospace products quality, which involves providing relevant information at each stage of the lifecycle in an easy-to-understand and complete form. The task is to create the analytical standard using the example of parts of precision and unit production. The model is based on the analytical standard of parts geometry developed using CAD/CAM-systems with the subsequent expansion of the models list to transfer the necessary information to all participants of the product lifecycle. According to the analysis, significant limitations of drawing documentation for informational support of aerospace industry objects at the stage of technology development are identified. The quality characteristics of the part are grouped according to the compliance degree with its nominal (reference) value of shape and dimensions (macrogeometry and microrelief), physical and chemical properties of the material and the surface layer, technological heredity and industrial purity. It is proposed to develop their models with the CAD/CAM-systems tools based on the analytical sample of geometry. Three necessary conditions for the correct formulation of the shaping problem regarding the implementation of quality management of serial products of machine-building enterprises are established. If at least one of them is violated, it is necessary to attract additional heuristic information to reproduce the correctness of the problem. The analytical standard creation and control implementation of an example of a mill that considers the geometry of the edges are shown, as well as a comparison of the reference geometry and geometry portrait. The scientific novelty of the obtained results consists of the concept introduction of an edge as a surface that connects the working “lines of two surfaces intersection” of a part. The representation of edges in the form of surfaces, not lines, on the one hand, and the selection of these surfaces from the totality of other working surfaces of the parts, on the other hand, creates an informational basis for developing the appropriate manufacturing technologies and maintenance of these parts elements during the product operation.

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“…In work [10], the developed ANN used with FEM simulation used in forming process to minimize the process development effort in terms of time and cost. In paper [11], the finite element is adopted to analyze and estimate the main factors, which particularly affect pressure and stresses distribution. Work [12] found that there are several important keys that influence the manufacturing process such as the risk of material failure, shape fulfillments, and variation.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Implementation of finite element analysis for solving the constraints in forming process of large steel parts

Jawad

Jaber

Ibrihim

2022

EEJET

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In recent years, the demand for high-durability parts are rising too much. These challenges are difficult to overcome without an innovative framework based on an accurate database. The problems of high stress generated due to the hard friction and severe crystal dislocation during the forming process need to be solved. High frictional forces between the contact surfaces while forming lead to high sticking between the parts. In this work, forming process of the large sheet metal has been explored based on some parameters like material properties, stress generation, and their effects on the product quality. For this purpose, square sheet metal of 721*721*5 mm is considered, and the product formation through many forming steps was carried out. This work includes adopting some design steps, modeling, and analysis to control some parameters and minimize the generation stresses. The finite element software (ABAQUS/CAE) has been adopted for analyzing this process. In this simulation, the forming process evolution in different steps has been analyzed, and the influence of the effective parameters was performed. As a result, it’s found that the generation stresses are highly concentrated near the fillet zones and proportional to the pressure, and depend on the nature of contact and friction. Simulation results also revealed that the uniform pressure during forming will leads to minimizing the friction and stress generation (5 %) and this will improve the product quality. Also, it’s possible to identify and facilitate many difficulties and evaluate the possibilities before further investing in tooling. It’s concluded that any accurate process like this must depend on some sequence steps like design, modeling, and simulation. Moreover, folding the large surface area needs accurate and adjustable types of equipment.

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Forming the geometric accuracy and roughness of holes when drilling aircraft structures made from polymeric composite materials

Cited by 10 publications

References 11 publications

Formation of the quality of holes obtained by drilling in aviation structures made from polymer composite materials

Formation of the quality of holes obtained by drilling in aviation structures made from polymer composite materials

Формування Вимог До Інформаційного Супроводу Виробництва Аерокосмічних Виробів Для Забезпечення Їх Якості

Implementation of finite element analysis for solving the constraints in forming process of large steel parts

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