Ensuring the quality of assembly of high-precision
products based on the method of individual selection of parts

Zadorina, N.A.; Nepomiluev, V. V.

doi:10.36652/0202-3350-2020-21-3-152-157

Cited by 2 publications

(3 citation statements)

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“…67-78. DOI: 10.18287/2541-7533-2023-22-2-67-78 Индивидуальный подбор деталей и сборочных единиц (кратко -деталей) как метод селективной сборки изделий предназначен для уменьшения разброса параметров изделий, собираемых из деталей, для которых установлены широкие поля допусков на значения отдельных параметров [1]. Согласно методу детали подбираются в сборочные комплекты исходя из измеренных (индивидуальных) значений их параметров так, что если отклонения параметров какой-либо детали от номинальных значений оказывают негативное влияние на параметры изделия, то они компенсируются за счёт параметров прочих деталей комплекта.…”

Section: селективная сборка; сборочный комплект; подбор деталей; мате...unclassified

“…Поэтому чаще всего для индивидуального подбора деталей в сборочные комплекты используют эвристические алгоритмы [3; 4], разработанные для строго определённых изделий, алгоритмы с элементами случайного поиска [5 -7]. И те и другие алгоритмы дают приближенное решение задачи типа (1). В литературе не представлено универсальной и отработанной методики индивидуального подбора деталей для сборки партии изделий путём оптимального распределения деталей по сборочным комплектам, которая могла бы найти широкое применение при сборке различных изделий.…”

Section: селективная сборка; сборочный комплект; подбор деталей; мате...unclassified

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Method of individual selection of parts for selective assembly of electrohydraulic servo drives

Медведев¹,

Khalatov

2023

VESTNIK of Samara University. Aerospace and Mechanical Engineer

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A method for selecting parts and assembly units (hereinafter briefly referred to as parts) in sets for assembling a batch of electrohydraulic servo drives is presented, based on the measured (individual) mechanical and hydraulic characteristics of the parts. The preparatory stage is described: construction of a mathematical model of the product, determination of the parameters of parts and adjustments that have the greatest impact on the parameters of end products, formation of a system for assessing the quality of products in the batch, mathematical formulation of the task of selecting parts. The task of selecting parts is formulated as the assignment problem in the maximin formulation. A deterministic algorithm for solving the problem is presented, based on the branch and bound method and taking into account the fact that adjustments are made during the assembly of drives. A significant reduction in the number of steps (iterations) when searching for the optimal distribution of parts across assembly sets achieved due to the chosen mathematical formulation of the task, as well as due to the chosen strategy of selecting parts in the next assembly set. We suggest that an assembly set should include, first of all, the most troublesome parts the parameters of which do not allow obtaining a set, the projected quality indicator of which will be higher than the established value. At the same time, the negative impact of these parts on the product parameters is compensated by combining them with other parts in one assembly set. The results of mathematical modeling of assembling 992 drives with random formation of assembly sets and with individual selection of parts are presented. Modeling shows that as a result of implementing individual selection of parts in accordance with the described method, a significant reduction in the spread of parameters of end products within batches can be expected, as well as improvements in functional performance of the products. The presented method of individual selection of parts can be used in the assembly of various products.

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Section: селективная сборка; сборочный комплект; подбор деталей; мате...unclassified

Method of individual selection of parts for selective assembly of electrohydraulic servo drives

Медведев¹,

Khalatov

2023

VESTNIK of Samara University. Aerospace and Mechanical Engineer

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“…Another sector assembly problem is the failure to make absolutely accurate dihedral angles, i.e. angles exactly equal to 120° [5][6][7][8][9]. Let us consider what happens, if the sum angle of the three sectors is less than or more than 360° (Fig.…”

Section: Sector Assembly Options а) Assembly Of Reference ("Ideal") S...mentioning

confidence: 99%

Features of Processing and Assembly of Composite Products

DERYABIN,

GUZEEV,

KOZLOV

et al. 2022

MSJ

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The paper examines the assembling of cylindrical products consisting of sector parts with dihedral angles. A crucial issue in the assembly of such parts is the accuracy of dihedral angles during processing. Based on methods of analytical geometry, we proved that in order to achieve gapless assembly of three sectors, the sum of all dihedral angles of the sectors should be less than or equal to 360°. Since it is impossible to ensure the exact equality of the sum of all dihedral angles of 360°, characteristic “flatness deviation” is always formed during assembly. In order t obtain a gapless connection, we propose a new method for the selective assembly of sectors and developed a scheme of the dihedral angle controller. This selective assembly method will allow sectors to be selected in such a way that their “twist” angle in the assembled conditions is minimal.

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Ensuring the quality of assembly of high-precision products based on the method of individual selection of parts

Cited by 2 publications

References 0 publications

Method of individual selection of parts for selective assembly of electrohydraulic servo drives

Method of individual selection of parts for selective assembly of electrohydraulic servo drives

Features of Processing and Assembly of Composite Products

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