scholarly journals Exploration on the Materials Quality Control of Railway Vehicle Weld Structure Based on Service Safety Demand

2021 ◽  
Vol 2109 (1) ◽  
pp. 012014
Author(s):  
Jianing Wang ◽  
Zezhou Wu ◽  
Bin Han ◽  
Tao Zhang ◽  
Baosheng Zhou ◽  
...  
Keyword(s):  
Quality Control ◽  
Railway Vehicle ◽  
Operating Environment ◽  
Design Life ◽  
Railway Industry ◽  
Testing Data ◽  
Basic Performance ◽  
Weld Structure ◽  
Original Equipment Manufacturers ◽  
Fracture Mechanical Parameters

Abstract With the continuous increasing of service-rail-vehicle in China, some defects such as cracks appeared at different stages of service when they had not reached the design life, while current theories and methods cannot explain the appearance of defects, which brought risks and hidden dangers to the operation of the vehicles. It was found that the reasons were mainly caused by one or several factors such as material performances, design, manufacturing process and operating environment. Since more and more sensors being installed on the vehicles to supervise the health of structure, it is more improtant to focus on the performances of materials. Through comparing different material standards including international, national, railway industry and enterprise standards, as well as the technical delivery conditions of other industries, it was recommended that the fracture mechanical parameters such as fracture toughness and fatigue crack growth should be proposed into the materials quality control regulations of original equipment manufacturers (OEMs). Furthermore, based on the testing data of materials from OEMs, several suggestions were proposed on the basic performance of materials such as raising the requirements contained impact, metallography and corrosion resistance properties in order to provide guarantee for the service safety of vehicles.

scholarly journals Service-based business models in the Swedish railway industry

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mirka Kans ◽  
Anders Ingwald
Keyword(s):  
Business Strategy ◽  
Service Management ◽  
Business Models ◽  
Business Environment ◽  
Strategy Development ◽  
Railway Vehicle ◽  
Content Type ◽  
Railway Industry ◽  
Business Opportunities ◽  
New Business

PurposeThe purpose is to describe new business opportunities within the Swedish railway industry and to support the development of business models that corresponds with the needs and requirements of Industry 4.0, here denoted as Service Management 4.0.Design/methodology/approachThe study is an in-depth and descriptive case study of the Swedish railway system with specific focus on a railway vehicle maintainer. Public reports, statistics, internal documents, interviews and dialogues forms the basis for the empirical findings.FindingsThe article describes the complex business environment of the deregulated Swedish railway industry. Main findings are in the form of identified business opportunities and new business model propositions for one of the key actors, a vehicle maintainer.Originality/valueThe article provides valuable understanding of business strategy development within complex business environments and how maintenance related business models could be developed for reaching Service Management 4.0.

The Application of Process Quality Control Tools in the Production Process

2009 ◽  
Vol 626-627 ◽  
pp. 741-746
Author(s):  
L.X. Ma ◽  
S.C. Dong ◽  
Jie Wang
Keyword(s):  
Quality Control ◽  
Production Process ◽  
Influencing Factor ◽  
Process Quality ◽  
Factors Influencing ◽  
Testing Data ◽  
Before And After ◽  
Improvement Measures ◽  
Working Procedure ◽  
Cause And Effect Diagram

Based on the quality survey of the working procedure of interior hole grinding of the ceramic shaft bush parts, this paper analyzes and studies it by the quality control tools such as Pareto diagram and Cause and effect diagram, and finds out the main deficiency indicator. The main influencing factor is that the verticality of the interior hole is Ultra-poor in the Process quality deficiencies. A series of the testing data of this deficiency indicator has been analyzed in order to obtain the factors influencing the deficiency indicator. Finally, comparison is made between the quality status before and after implementing improvement measures and measures of adjusting processes are taken to greatly improve the effect and the product qualified rate, which can provide reference for enterprises to improve the quality in the production process.

scholarly journals Convenience of Hgb-O detected by optical method in XN-series hematology analyzers in evaluating hemoglobin concentration in samples with chylous turbidity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yu Aruga ◽  
Chiaki Ikeda ◽  
Arisa Hanai ◽  
Sakiko Yoshimura ◽  
Momoko Kito ◽  
...  
Keyword(s):  
Quality Control ◽  
Optical Method ◽  
Colorimetric Method ◽  
Hemoglobin Concentration ◽  
Internal Quality Control ◽  
Internal Quality ◽  
Lauryl Sulfate ◽  
Fat Emulsion ◽  
Basic Performance ◽  
Hematology Analyzers

AbstractThe chylous turbidity of blood samples is one of the causes of false-high hemoglobin (Hgb) concentration measurements by the colorimetric method, which has been widely applied in hematology analyzers. In such cases, additional manual procedures are required to correct Hgb concentrations. We therefore examined the effectiveness of an optical method for measuring Hgb concentrations in samples with chylous turbidity using Hgb-O in the reticulocyte channel equipped in XN-series analyzers (Sysmex, Kobe, Japan). Hgb-O showed excellent basic performance, including linear correlation and invariability with sodium lauryl sulfate (SLS)-Hgb detected by the colorimetric method. In the analysis of samples from healthy volunteers supplemented with fat emulsion, chylous turbidity did not affect Hgb-O but SLS-Hgb, which was falsely increased according to the dose of fat emulsion. Actually, SLS-Hgb was falsely elevated in 34 of 40 chylous turbidity 3+ samples. The remaining 6 samples were measured in hematology analyzers where Hgb-O was inconsistent with SLS-Hgb in the internal quality control records. For these samples, the correction factors calculated from the internal quality control records could contribute to providing the corrected Hgb-O value. These findings suggested that the optical method was effective and convenient for accurately evaluating Hgb concentrations in samples with extremely chylous turbidity.

scholarly journals Risk Analysis is a Prerequisite for Quality Management of Traction Rolling Stock Repairs

2021 ◽  
Vol 346 ◽  
pp. 03018
Author(s):  
Vladimir Gaponov ◽  
Dmitriy Kuznetsov ◽  
Andrey Khvostikov ◽  
Roman Alekhin
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Risk Analysis ◽  
Rolling Stock ◽  
Traction Motor ◽  
Railway Industry ◽  
Complex Equipment ◽  
Fmea Analysis

The paper considers a new version of IRIS ISO/TS 22163:2017 standard in relation to the quality of repair of complex equipment in the railway industry. It is shown that the new version of ISO/ TS 22163:2017 standard provides for the need of organizations to conduct risk analysis and accounting in their work. The authors propose to consider as an example a well-established analysis of the types and consequences of potential defects in FMEA process. The use of FMEA analysis made it possible to consider the significance of various risks of the quality of traction rolling stock repair, as well as to establish the importance of quality control operations for impregnation of a traction motor.

Automatically Detecting Rotation in Chest Radiographs Using Principal Rib-Orientation Measure for Quality Control

2015 ◽  
Vol 29 (02) ◽  
pp. 1557001 ◽  
Author(s):  
K. C. Santosh ◽  
Sema Candemir ◽  
Stefan Jaeger ◽  
Alexandros Karargyris ◽  
Sameer Antani ◽  
...  
Keyword(s):  
Quality Control ◽  
Chest Radiographs ◽  
Data Sets ◽  
Maximum Magnitude ◽  
Abnormality Detection ◽  
Testing Data ◽  
Computer Aided ◽  
Novel Method ◽  
The Difference ◽  
Aided Diagnosis

We present a novel method for detecting rotated lungs in chest radiographs for quality control and augmenting automated abnormality detection. The method computes a principal rib-orientation measure using a generalized line histogram technique for quality control, and therefore augmenting automated abnormality detection. To compute the line histogram, we use line seed filters as kernels to convolve with edge images, and extract a set of lines from the posterior rib-cage. After convolving kernels in all possible orientations in the range [0°, 180°), we measure the angle with maximum magnitude in the line histogram. This measure provides an approximation of the principal chest rib-orientation for each lung. A chest radiograph is upright if the difference between the orientation angles of both lungs with respect to the horizontal axis is negligible. We validate our method on sets of normal and abnormal images and argue that rib orientation can be used for rotation detection in chest radiographs as an aid in quality control during image acquisition. It can also be used for training and testing data sets for computer aided diagnosis research, for example. In our experiments, we achieve a maximum accuracy of approximately 90%.

An Application of a Generalized Life Cycle Cost Model to BOXN Wagons of Indian Railways

2010 ◽  
Author(s):  
Laxman Yadu Waghmode ◽  
Anil Dattatraya Sahasrabudhe
Keyword(s):  
Life Cycle ◽  
Life Span ◽  
Life Cycle Cost ◽  
Life Cycle Costing ◽  
Design Stage ◽  
Railway Vehicle ◽  
Repairable System ◽  
Initial Product ◽  
Finished Steel ◽  
Railway Industry

The objective of this paper is to apply a methodology developed for effective implementation of life cycle costing (LCC) in design and procurement of repairable products/systems to railway wagons. From its origin in defense equipment in US in 1960s, the application of life cycle cost concept has now been extended to other areas of private and public sectors too. This is because the customers are now considering not only the initial product costs but also the cost implications associated with the entire life span of a product. This emerging trend in global markets is gradually forcing the product manufacturers to estimate and optimize the product LCC with reference to performance, safety, reliability (R), and maintainability (M). The life cycle cost of a repairable system is closely coupled to its reliability and maintainability and therefore a careful consideration to the R & M parameters in the product design stage is quite essential from the LCC viewpoint. Taking into consideration these aspects a generalized modeling methodology has been proposed to estimate the life cycle cost of repairable products based on R & M principles. Life cycle costing in railway industry has traditionally been focused on the prediction of investment of railway vehicle. But, today’s mass transit market has rapidly been changed and the suppliers are now forced to treat the LCC of entire railway system. Indian railways are the principle mode of transport for raw materials for steel plants, finished steel from steel plants, coal, oil, iron, cement, petroleum products, fertilizers and food grains in India. To serve this purpose BOXN wagons are used by Indian railways. The BOXN wagons typically have a life span of 35 years and being a repairable system experience multiple failures over their life span. In this paper, a generalized model for LCC of repairable products has been proposed and is applied to BOXN wagon of Indian railways and the results obtained are presented. The methodology presented herein is expected to provide some useful guidelines to the railway industry to predict and analyze the life cycle cost of railway vehicles.

An Improving Approach for 6σ-Based Multi-Process Machining Environement

2011 ◽  
Vol 314-316 ◽  
pp. 2524-2528
Author(s):  
Guang Hui Zhou ◽  
Ben Wang ◽  
Zhong Dong Xiao ◽  
Ping Yu Jiang
Keyword(s):  
Quality Control ◽  
Product Quality ◽  
Quality Management System ◽  
Environmental Parameters ◽  
Operating Environment ◽  
Machine Material ◽  
Key Points ◽  
Quality Of Products ◽  
Control And Management

In the 6σ-based product quality management system, influencing factors of 5M1E (man, machine, material, method, measure and environment) are the key points to ensure the quality of products reach 6σ level. However, because the traditional quality control methods only focus on the factors of machine, material, method and measure but ignore the factors of man and environment and their relationship on product quality, the 6σ level objective of product quality cannot be implemented well. As such, this study proposes an improving approach for 6σ-based multi-process machining environment whose objective is to build the connection relationship and model among operating environment, workers and product quality. Through adjusting the values of operating environmental parameters, the behaviors of workers on machines can be controlled and the product quality can be improved. This study provides a new solution for 6σ-based product quality control and management.

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