Reliability Analysis of the Welded Bellows for Mechanical Seals Based on Six Sigma

Zhang, Zhong; Ma, Chenbo; Sun, Jian‐Jun; Zhang, Yuyan; Ni, Xingya

doi:10.3390/met12071073

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Consequently, the welded S-type corrugated diaphragms, which are extensively used in aviation engine components, must be thinner, larger in diameter, and more complex in shape to achieve more significant maximum compression. This necessitates the implementation of even more precise techniques during the fabrication of the corrugated diaphragms [ 7 , 8 , 9 ]. Traditional stamping techniques to fabricate diaphragms frequently generate a considerable degree of springback after applying a cold stamping process.…”

Section: Introductionmentioning

confidence: 99%

Study on Stamping–Bulging Process of Thin-Walled Superalloy Diaphragm for S-Shaped Bellows

He,

Zhao,

Zhang

et al. 2024

Materials

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A combined stamping–bulging forming process was proposed to achieve high-precision forming of large-diameter, ultra-thin-walled, superalloy welded S-type corrugated diaphragms. The underlying principle is to enhance the diaphragm’s forming accuracy by increasing the plastic deformation region and reducing springback. Using the ABAQUS version 6.14 finite element analysis software, finite element models were constructed for the stamping, hydraulic bulging, and combined stamping–bulging forming processes of the welded S-type metal corrugated diaphragms. A comparative analysis was conducted on the forming processes of the welded S-type metal corrugated diaphragms under the three forming methods, focusing on equivalent stress, distribution of wall thickness, and forming accuracy. This analysis determined the optimal forming process and the corresponding process parameters for superalloy welded S-type metal corrugated diaphragms. The results show that under a constant drawing force, as the bulging pressure increases, the plastic deformation of the straight sections of the diaphragm becomes more pronounced, resulting in improved shape accuracy. The combined stamping–bulging forming process guarantees the highest degree of shape accuracy for the diaphragm. The optimal process parameters were identified as a 30 t force and a 5 MPa pressure, with a maximum shape error of 0.02 mm. Concerning a plate thickness of 0.3 mm, the maximum deviation rate was found to be 6.7%, which represents a 30% improvement over traditional stamping processes. The maximum wall thinning rate was found to be 3.3%, a 1% reduction compared to traditional stamping processes, confirming the process’s feasibility.

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Section: Introductionmentioning

confidence: 99%

Study on Stamping–Bulging Process of Thin-Walled Superalloy Diaphragm for S-Shaped Bellows

He,

Zhao,

Zhang

et al. 2024

Materials

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“… DMAIC Six Sigma: Permite conocer la variación que hay en el proceso en cuanto a los requerimientos del cliente. Esta herramienta también se utiliza para el análisis estadístico para predecir la influencia de factores inciertos [16] La implementación de Six Sigma es una estrategia exitosa para reducir los defectos que se producen a lo largo de la línea de producción [21] II. METODOLOGÍA En esta presente investigación se considera que es diagnóstica por diseño y propositiva basada en ciencia formar y exacta.…”

Section: Introductionunclassified

Improved profitability in quality management and production process of the company Super Dorado. Trujillo, 2022

Espino¹,

Alza²,

Aliaga³

2022

Proceedings of the 2nd LACCEI International Multiconference on Entrepreneurship, Innovation and Regional Development (LEIRD 202

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The purpose of this research was to create a plan to improve profitability in quality management and production process in the Super Dorado poultry company, Trujillo, 2022. By design, this research is diagnostic and purposeful based on in formal and exact science. The main root causes by which the company is affected were analyzed; the economic impact that each one represents was also disclosed. Among the main causes that could be found we have: lack of production planning, absence of plan for acquisition of raw material, lack of machinery maintenance and lack of staff training. The engineering methodologies that were implemented in the present investigation were: House of Quality (QFD), AMFE, DMAIC Six Sigma. These tools will help us to improve the company's operating process. This research determined the use of the tools; DOP, Ishikawa, QFD, Control Charts, AMFE and in the same way the Minitab software was used to simulate the current situation of the company and after the improvement. The Pareto diagram was used for the initial diagnosis in the production areas of the company, prioritizing one of the four root causes, the lack of planning in production. Likewise, the economic evaluation of the improvement proposal was made, resulting in a value of Van de

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Numerical and experimental study on axial hydroforging process of 5A03 aluminium alloy S-shaped bellows

Wang

Chu

Sun

et al. 2023

Int J Adv Manuf Technol

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Reliability Analysis of the Welded Bellows for Mechanical Seals Based on Six Sigma

Cited by 3 publications

References 12 publications

Study on Stamping–Bulging Process of Thin-Walled Superalloy Diaphragm for S-Shaped Bellows

Study on Stamping–Bulging Process of Thin-Walled Superalloy Diaphragm for S-Shaped Bellows

Improved profitability in quality management and production process of the company Super Dorado. Trujillo, 2022

Numerical and experimental study on axial hydroforging process of 5A03 aluminium alloy S-shaped bellows

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