Experimental study of static and dynamic rigidities of flexible particulate bed fixtures under external vertical and torque loads

Abou-Hanna, Jeries; Okamura, Kiyohisa; McGreevy, Timothy

doi:10.1016/0278-6125(94)90003-5

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…У [12] запропоновано конструкцію модульного пристрою зі змінною жорсткістю для операції чорнового фрезерування, принцип якого полягає в автоматизованому керуванні жорсткістю поворотної пружини вихровими токами. Також експериментальними дослідженнями статичної та динамічної жорсткості під впливом зовнішніх вертикальних сил та моментів займалися J. Abou-Hanna та ін., що відображено у [13], де результати досліджень представлені у вигляді залежностей деформацій поверхонь заготовки від глибини різання, сили закріплення та поперечного перерізу заготовки.…”

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Experimental Research of the Rigidity of Fixtures With Incomplete Location for Connecting Rod Type Parts

Dehtiarov¹,

Neshta²,

Kosov³

et al. 2022

TST

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The use of modern machining centers with wide technological capabilities and the active development of productions with a small-scale form of organization necessitates an increase in the efficiency of fixtures capable of ensuring sufficient accuracy of machining with minimal costs.Classical approaches to the design of fixtures do not always allow machining with one installation with high-performance cutting conditions, so it is necessary to move the new approaches that allow maximum tool availability, which is important for the competitiveness of enterprises.The analysis of research and publications on numerical modeling and experimental research on the processing of parts of a complex shape that have insufficient rigidity showed that the issues of static research of the stress-deformation state of fixtures with incomplete locating have received little attention in the scientific literature.The purpose of the article is to experimentally demonstrate the possibility of machining non-separable connecting rods in machine tools with incomplete basing and fastening only on unprocessed surfaces in one installation with the achievement of all the necessary indicators of dimensional accuracy.The work presents for the first time an improved fixture with an incomplete location for machining connecting rod-type parts, and experimental studies of its stress-strain state in static mode are performed. The determined values of stresses and displacements compared with the previously proposed machine tool showed its technical advantage in bearing capacity for loads acting during machining.In this work, it was experimentally proven for the first time that the design of the improved fixture for machining connecting rods is capable of providing the necessary machining accuracy under static load and at the same time has a margin of accuracy thatexceeds the value of deformations by 1.5...2.5 times. The presented results and the positive experience of manufacturing a sample of a fixture can be used for its further research in a dynamic mode directly during machining, as well as for the design of technological equipment for parts of other classes, using an approach that involves incomplete locating of the workpiece

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Experimental Research of the Rigidity of Fixtures With Incomplete Location for Connecting Rod Type Parts

Dehtiarov¹,

Neshta²,

Kosov³

et al. 2022

TST

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Fixturing technology and system for thin-walled parts machining: a review

Wang

et al. 2022

Front. Mech. Eng.

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During the overall processing of thin-walled parts (TWPs), the guaranteed capability of the machining process and quality is determined by fixtures. Therefore, reliable fixtures suitable for the structure and machining process of TWP are essential. In this review, the key role of fixtures in the manufacturing system is initially discussed. The main problems in machining and workholding due to the characteristics of TWP are then analyzed in detail. Afterward, the definition of TWP fixtures is reinterpreted from narrow and broad perspectives. Fixture functions corresponding to the issues of machining and workholding are then clearly stated. Fixture categories are classified systematically according to previous research achievements, and the operation mode, functional characteristics, and structure of each fixture are comprehensively described. The function and execution mode of TWP fixtures are then systematically summarized and analyzed, and the functions of various TWP fixtures are evaluated. Some directions for future research on TWP fixtures technology are also proposed. The main purpose of this review is to provide some reference and guidance for scholars to examine TWP fixtures.

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