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Title Development of Flexible Fixtures with Incomplete Locating: Connecting Rods Machining Case Study
Authors Ivanov, Vitalii Oleksandrovych  
Botko, F.
Dehtiarov, I.
Kočiško, M.
Evtuhov, A.
Pavlenko, Ivan Volodymyrovych  
Trojanowska, J.
ORCID http://orcid.org/0000-0003-0595-2660
http://orcid.org/0000-0002-6136-1040
Keywords fixture design
machining
sustainable manufacturing
process innovation
complex-shape part
Type Article
Date of Issue 2022
URI https://essuir.sumdu.edu.ua/handle/123456789/89579
Publisher MDPI
License Creative Commons Attribution 4.0 International License
Citation Ivanov, V.; Botko, F.; Dehtiarov, I.; Kočiško, M.; Evtuhov, A.; Pavlenko, I.; Trojanowska, J. Development of Flexible Fixtures with Incomplete Locating: Connecting Rods Machining Case Study. Machines 2022, 10, 493. https://doi.org/10.3390/machines10070493
Abstract The rapid development of manufacturing in recent years has led to a significant expansion of the technological capabilities of modern metal-cutting equipment. Therefore, the modern approach to intensifying production requires an advanced fixture design. Design and manufacture of flexible fixtures capable of machining similar shapes and sizes of complex geometry parts reduce setup time. The article aims to design flexible fixtures for parts such as one-piece connecting rods under incomplete locating conditions. The advantages are the minimum number of parts and tool availability for multi-axis machining connecting rods in one setup. This approach, combined with up-to-date machining centers and industrial robots, can increase the production efficiency of manufacturing non-removable connecting rods. This effectiveness is in a decrease in the number of operations by 5–7 times, fixtures—by 3–4 times, and machine tools—by 3–5 times, depending on the type of a non-removable connecting rod and its design features. The numerical simulation results of the proposed fixture design confirmed the comprehensive technological capabilities and dynamic characteristics. Particularly, a decrease in displacements and oscillation amplitudes up to 7% compared to the full-basing locating chart was provided. It is determined that the system “fixture–workpiece” entirely meets all the strength, accuracy, and rigidity parameters, which allows you to perform machining with intensive cutting modes. The amplitudes of oscillations do not exceed the tolerances on the dimensions of these surfaces, established by requirements for non-removable connecting rods, and all displacements are elastic. During numerical simulation, the workpiece position remained stable at all machining steps.
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