Investigation of Forging Metal Specimens of Different Relative Reductions Using Ultrasonic Waves

Moravec, Ján; Bury, Peter; Černobila, František

doi:10.3390/ma14092406

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…Production produces parts that are not entirely accurate and that show deviations from nominal values and from each other. The parts are measured to compare them with the specification [10][11][12]. The geometrical product specification (GPS) defines, on an engineering drawing, the shape (geometry), dimensions and surface characteristics that provide the optimum function of the part, along with the variance around the optimum that will still provide satisfactory function.…”

Section: Fig 1 Example Of a Gearbox Cad Model Cad Computer-aided Designmentioning

confidence: 99%

GPS Application in the Design of Gearboxes

Maláková

Sivák

2022

Acta Mechanica Et Automatica

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The integrated geometrical product specification (GPS) system for workpiece geometry specification and verification is an improved engineering tool for product development and production. The goal of the GPS system is to provide tools for cost-effective management of variability in products and processes. This can be achieved by using a more precise way of expressing the functional requirements of the workpiece, complete and well-defined specifications and integrated verification approaches. The intended function of the product is ensured by controlling the geometry and material properties of the workpiece parts, which make up the product. GPS is a language just for checking geometry, and further development is based on computational mathematics and correct, consistent logic using general sets of rules that can be applied to all types of specifications. This article deals with the application of GPS rules in the design of gearboxes.

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Section: Fig 1 Example Of a Gearbox Cad Model Cad Computer-aided Designmentioning

confidence: 99%

GPS Application in the Design of Gearboxes

Maláková

Sivák

2022

Acta Mechanica Et Automatica

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“…Given the diverse combinations of loads encountered in practical scenarios, it becomes necessary to assemble multiple multiaxial fatigue testing devices capable of simulating these load combinations. Consequently, one of the aims of this study, in line with the referenced works [2,7,8,19,27], is to establish a comprehensive testing methodology for evaluating the fatigue life under the combined cyclic loading effects of bending and torsion.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Dynamic Analysis in the Complex Design of an Unconventional Three-Wheeled Vehicle with Enhancing Cornering Safety

Blatnický,

Dižo,

Sága

et al. 2023

Machines

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Current trends in the transportation industry prioritize competitive rivalry, compelling manufacturers to prioritize concepts such as quality and reliability. These concepts are closely associated with public expectations of safety, vehicle lifespan, and trouble-free operation. However, the public must recognize that a vehicle weighing several hundred kilograms, moving at a non-zero speed, only contacts the road surface through a few points (depending on the number of wheels), each no larger than a human palm. Therefore, it is imperative to operate the vehicle in a manner that optimizes the behavior of these contact points. There are situations where drivers find themselves requiring dynamic vehicle handling, often unpredictable with a high degree of uncertainty. Rapid changes in direction become necessary in these cases. Such maneuvers can pose a significant risk of rollover for three-wheeled vehicles. Hence, the vehicle itself should contribute to increased ride safety. This paper presents key findings from the development of an unconventional three-wheeled vehicle utilizing the delta arrangement. Rollover safety for three-wheeled vehicles is currently well-managed, thanks to the utilization of electronic or mechatronic systems in delta-type vehicles to enhance stability. However, these systems require additional components. In contrast, the proposed control system operates solely on a mechanical principle, eliminating operational costs, energy consumption, maintenance expenses, and similar factors. The study also explores the absence of equivalent suspension and steering systems for front-wheel steering. Such designs are lacking in both practical applications and theoretical realms. Analytical and simulation calculations are compared in this study, highlighting the effectiveness of the newly proposed control system in enhancing stability and safety compared to conventional front-wheel suspension systems. Simulation programs provide more realistic results than analytical calculations due to their ability to account for dynamic effects on vehicle components and passengers, which is practically unfeasible in analytical approaches. Furthermore, this study focuses on investigating the fatigue life of material frames subjected to dynamic loading, which is a crucial aspect of ensuring safety. It is essential to have various testing devices to examine the fatigue life of materials under both uniaxial and multiaxial loading conditions. However, obtaining experimental results for fatigue life measurements of specific materials, which can be directly applied to one’s research, poses significant challenges. Hence, the proposed testing device plays a vital role in measuring material fatigue life and advancing the development of unconventional transportation methods. The information about the original testing device aligns perfectly with the article’s emphasis on dynamic analysis. The ultimate objective of all these efforts is to put the vehicle into practical operation for commercial utilization.

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“…Optimal values of the main technological parameters of forging and appropriate groups of anvils to be used in the individual stages of forging were proposed in order to eliminate the metallurgical defects. Using ultrasonic waves, Moravec, Bury, and Černobila [ 22 ] investigated selected characteristics of forging steel specimens for various levels of their relative reduction. The experimental procedure, using both the attenuation and velocity measurements, verified that the reduction in specimens’ material had an effect on the propagation of ultrasound waves passing through the body of the specimen.…”

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confidence: 99%