A methodology for near net shape process feasibility assessment

Marini, Daniele; Corney, Jonathan

doi:10.1080/21693277.2017.1401495

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…A frequently used noise reduction method is the installation of a noise reduction valve cage with holes drilled in the cage, which can only satisfy the linear flow characteristics due to the uniform distribution of the holes [21,22]. Sotoodeh [23] investigated valve cages with many small holes drilled in the control valve to divide the flow into many small flows, using this design to reduce noise.…”

Section: Introductionmentioning

confidence: 99%

Design of Noise-Reducing Two-Stage Cage Control Valve and Its Fluid Characteristics and Cavitation Study

2022

Journal of Chemistry

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For all kinds of media noise, noise reduction valve cage cannot meet the equal percentage flow characteristics, and for manufacturing and processing and other technical problems, research and design of new noise reduction two-stage cage control valve are necessary. The valve adopts noise reduction valve cage and curve valve cage with noise reduction, forming a two-stage noise reduction, with uniform flow, diffusion, and noise reduction effect, to meet the regulating valve equal percentage flow characteristics. The spool is evenly stressed and not easy to loosen and fall off, and the small opening is not easy to vibrate and shake. The flow characteristics of the noise-reducing two-stage cage control valve are studied, and the fluid flow coefficients, flow characteristic curves, the relationship of flow coefficients with nominal diameter at the same stroke, and the relationship of flow coefficients with different nominal diameters at different strokes are analyzed. The relationship between nominal diameter constant opening and cavitation coefficient with inlet velocity, the relationship between inlet velocity and cavitation coefficient with nominal diameter at half opening, and the relationship between inlet velocity and cavitation coefficient with nominal diameter at full opening were studied, and the cavitation generation and its effect on noise were analyzed. The noise and cavitation test showed that noise is very small and cavitation is difficult to produce, all meeting the noise reduction requirements.

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Section: Introductionmentioning

confidence: 99%

Design of Noise-Reducing Two-Stage Cage Control Valve and Its Fluid Characteristics and Cavitation Study

2022

Journal of Chemistry

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“…As a direct result of this analysis, centrifugal casting was adopted for valve cage production generating 26.5%, saving 490 machining hours and 18.9 tons of raw material. The NNS process feasibility study and application details can be found in [46].…”

Section: Resultsmentioning

confidence: 99%

Process selection methodology for near net shape manufacturing

Marini

Corney

2019

Int J Adv Manuf Technol

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This paper presents a new selection methodology that for the first time supports the identification of Near Net Shape (NNS) processes. The methodology, known as "Product, Geometry, Manufacturing and Materials Matching" (ProGeMa3), is composed of four steps, which aim to minimize raw material usage and machining by adopting a NNS approach. A key component of the methodology is the Process Selection Matrix (ProSMa) that associates a component's shape and production volume with its material requirements to reduce the number of candidate NNS processes. A final selection is then made from this shortlist by using fuzzy logic and considering other constraints and functional requirements. The ProGeMa3 selection process is illustrated by its application to an industrial component that resulted in changes to the processes used for its commercial manufacture. The ProGeMa3 and ProSMa presented in this paper aspires to be current and comprehensive for solid metallic components produced by casting, forging and additive technologies. However, ProSMa is also accessible as an open source resource available for other researcher to extend and adapt.

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“…Some efforts on NNS document both reduction of waste in specific manufacturing processes and achievement of specific properties with low defect rates. This is borne out by few existing papers [ 17 , 19 , 20 ] that report aiming for a near net shape while also focusing on attendant functionality, mechanical properties and microstructure without explicit reference to surface integrity . Surface integrity considerations are significant because of their potential to enhance product life [ 21 , 22 ], which is vital to sustainable development .…”

Section: Frugal Manufacturingmentioning

confidence: 99%

“… existing NNS process tolerances surface integrity properties process cost no. processes wastage 1 centrifugal casting and machining [ 20 ] yes no yes unknown 3 0 2 roll forming [ 32 ] yes no yes low 1 0 3 isothermal forging [ 29 ] yes no yes unknown 1 minimal 4 flow forming [ 23 ] yes no yes high 1 0 5 cold forging of spur gear [ 19 ] yes no yes unknown 2 minimal 6 cold forging of tulip shaft [ 19 ] yes no yes unknown 3 minimal 7 ...…”

Section: Gauging Frugality Of Processesmentioning

confidence: 99%

Frugal manufacturing in smart factories for widespread sustainable development

Rao

2021

R. Soc. open sci.

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Manufacturing is a crucial activity of product development that feeds into and is also influenced by the design process. Any material conservation gained during manufacturing directly affects the green credentials of a product. Manufacturing waste can be contrived to approach zero through a recently developed frugal design approach that quantifies resource conservation at all stages of development of a product engineered for frugality. Accordingly, this effort presents frugal manufacturing (FM), integral to the frugal design approach , for utmost reduction of waste while aiming for good surface integrity, better properties, minimal number of processes and low cost. Other than saving on energy and hence emissions, the new concept of FM also goes beyond current near net shape technologies, which advocate mainly for zero wastage and suitable properties while using a narrow range of manufacturing processes. Case studies involving high-speed machining , superplastic forming and additive manufacturing of aerospace alloys have been presented that bring out the features and benefits of FM. As such the multipronged objectives of FM should be dovetailed with those of smart factories for creating novel technologies that abet widespread sustainable development. Such enhancement of the smart factories concept has been argued to support unusual applications such as the fight against pandemics including the current one involving COVID-19.

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A methodology for near net shape process feasibility assessment

Cited by 6 publications

References 35 publications

Design of Noise-Reducing Two-Stage Cage Control Valve and Its Fluid Characteristics and Cavitation Study

Design of Noise-Reducing Two-Stage Cage Control Valve and Its Fluid Characteristics and Cavitation Study

Process selection methodology for near net shape manufacturing

Frugal manufacturing in smart factories for widespread sustainable development

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