Design and Development of a Singularizing Unit for Part Feeding System

2014 ◽  
Vol 14 (1) ◽  
pp. 39-45
Author(s):  
M. Suresh ◽  
K.A. Jagadeesh ◽  
R. Rathish
Keyword(s):  
Large Scale ◽  
Linear Part ◽  
Agile Manufacturing ◽  
Feeding System ◽  
Key Factors ◽  
Brake Pads ◽  
Effective Part ◽  
Vibration Time ◽  
Part Feeders ◽  
Part Feeding

AbstractIn the modern industrial world, speed, agility, accuracy and less time are the key factors to attain a position in the market. Various forms of the products manufactured which could either be symmetric or asymmetric. The stacking of the asymmetric parts are either done manually which is a time-consuming job or by installing robots which are costly. To overcome this problem, part feeders are introduced to stack the parts in a specific orientation. In the automotive industry the brake pads are the components manufactured in a large scale. The manufacture of components and stacking them is an intensive task which necessitates agile manufacturing. So a linear part feeding system is designed along with the trap and conveyor system to reorient the asymmetric part to its most favorable orientation for stacking. The major problem arrives in part feeding system is to send parts one by one to trap. The main objective of this work is to design and develop the singularizing unit for sending the parts one by one. The system is designed to separate the brake pads from clusters and singularize them. The singularizing unit is designed by using Markov model and the unit is fabricated. Experiments were conducted for selecting the suitable parameters by making the unit at various levels of inclinations by using base plates of various thicknesses. The parameters which are concentrated while orienting the parts are frequency of vibration, time to travel the part on the singularizing unit and acceleration of the part for effective part motion in a singularizing unit.

scholarly journals Understanding the Processes Causing the Early Intensification of Hurricane Dorian through an Ensemble of the Hurricane Analysis and Forecast System (HAFS)

Atmosphere ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 93
Author(s):  
Andrew Hazelton ◽  
Ghassan J. Alaka ◽  
Levi Cowan ◽  
Michael Fischer ◽  
Sundararaman Gopalakrishnan
Keyword(s):  
Tropical Cyclone ◽  
Large Scale ◽  
Early Stage ◽  
Early Period ◽  
Storm Track ◽  
Key Factors ◽  
Complex Interplay ◽  
Forecast System ◽  
Model Initialization

The early stages of a tropical cyclone can be a challenge to forecast, as a storm consolidates and begins to grow based on the local and environmental conditions. A high-resolution ensemble of the Hurricane Analysis and Forecast System (HAFS) is used to study the early intensification of Hurricane Dorian, a catastrophic 2019 storm in which the early period proved challenging for forecasters. There was a clear connection in the ensemble between early storm track and intensity: stronger members moved more northeast initially, although this result did not have much impact on the long-term track. The ensemble results show several key factors determining the early evolution of Dorian. Large-scale divergence northeast of the tropical cyclone (TC) appeared to favor intensification, and this structure was present at model initialization. There was also greater moisture northeast of the TC for stronger members at initialization, favoring more intensification and downshear development of the circulation as these members evolved. This study highlights the complex interplay between synoptic and storm scale processes in the development and intensification of early-stage tropical cyclones.

scholarly journals The development of regional differentiation of office construction in the Czech Republic: 1990–2010

2015 ◽  
Vol 23 (1) ◽  
pp. 21-33
Author(s):  
Pavel Domalewski ◽  
Jan Baxa
Keyword(s):  
Spatial Distribution ◽  
Czech Republic ◽  
Questionnaire Survey ◽  
Large Scale ◽  
Capital City ◽  
Office Building ◽  
Regional Differentiation ◽  
Key Factors ◽  
The Czech Republic ◽  
Dominant Position

Abstract The factors that were crucial for the construction of administrative buildings in the regional capitals of the Czech Republic are subject to examination in this article. One primary question is whether the development of office construction reflects the qualitative importance of the cities, or whether there are some other regularities in the spatial distribution of construction. To identify the key factors, controlled interviews with experts professionally involved in the construction of administrative buildings were carried out, and these data were then extended as part of a large-scale questionnaire survey with other experts on the issue. The results have confirmed the dominant position of the capital city of Prague in terms of its qualitative importance, as the remaining regional capitals have less than one-tenth of the volume of modern office building areas. The greatest differences in the construction of administrative buildings have been noted in Brno and Ostrava, despite the fact that they exhibit similar characteristics when considered in the light of respondent-determined factors.

scholarly journals Pd/Au Based Catalyst Immobilization in Polymeric Nanofibrous Membranes via Electrospinning for the Selective Oxidation of 5-Hydroxymethylfurfural

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 45 ◽  
Author(s):  
Danilo Bonincontro ◽  
Francesco Fraschetti ◽  
Claire Squarzoni ◽  
Laura Mazzocchetti ◽  
Emanuele Maccaferri ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Large Scale ◽  
Catalytic Performance ◽  
High Yield ◽  
Key Factors ◽  
Hydroxymethyl Furfural ◽  
Catalyst Immobilization ◽  
Polymeric Component ◽  
Furandicarboxylic Acid ◽  
Nanofibrous Membranes

Innovative nanofibrous membranes based on Pd/Au catalysts immobilized via electrospinning onto different polymers were engineered and tested in the selective oxidation of 5-(hydroxymethyl)furfural in an aqueous phase. The type of polymer and the method used to insert the active phases in the membrane were demonstrated to have a significant effect on catalytic performance. The hydrophilicity and the glass transition temperature of the polymeric component are key factors for producing active and selective materials. Nylon-based membranes loaded with unsupported metal nanoparticles were demonstrated to be more efficient than polyacrylonitrile-based membranes, displaying good stability and leading to high yield in 2,5-furandicarboxylic acid. These results underline the promising potential of large-scale applications of electrospinning for the preparation of catalytic nanofibrous membranes to be used in processes for the conversion of renewable molecules.

scholarly journals Key Factors Affecting the Deformation and Failure of Surrounding Rock Masses in Large-Scale Underground Powerhouses

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Meng Wang ◽  
Jia-wen Zhou ◽  
An-chi Shi ◽  
Jin-qi Han ◽  
Hai-bo Li
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Surrounding Rock ◽  
Rock Masses ◽  
Affecting Factors ◽  
Key Factors ◽  
Underground Powerhouse ◽  
Deformation And Failure ◽  
Factors Affecting ◽  
Geological Conditions

The stability of the surrounding rock masses of underground powerhouses is always emphasized during the construction period. With the general trends toward large-scale, complex geological conditions and the rapid construction progress of underground powerhouses, deformation and failure issues of the surrounding rock mass can emerge, putting the safety of construction and operation in jeopardy and causing enormous economic loss. To solve these problems, an understanding of the origins and key affecting factors is required. Based on domestic large-scale underground powerhouse cases in the past two decades, key factors affecting the deformation and failure of the surrounding rock mass are summarized in this paper. Among these factors, the two most fundamental factors are the rock mass properties and in situ stress, which impart tremendous impacts on surrounding rock mass stability in a number of cases. Excavation is a prerequisite of surrounding rock mass failure and support that is classified as part of the construction process and plays a pivotal role in preventing and arresting deformation and failure. Additionally, the layout and structure of the powerhouse are consequential. The interrelation and interaction of these factors are discussed at the end of this paper. The results can hopefully advance the understanding of the deformation and failure of surrounding rock masses and provide a reference for design and construction with respect to hydroelectric underground powerhouses.

Design methodology for a hybrid part feeding system in lean-based assembly lines

2017 ◽  
Vol 37 (1) ◽  
pp. 84-102 ◽  
Author(s):  
Saliha Karadayi Usta ◽  
Mehmet Kursat Oksuz ◽  
Mehmet Bulent Durmusoglu
Keyword(s):  
Design Methodology ◽  
Mixed Model ◽  
Transportation Cost ◽  
Decision Makers ◽  
Feeding System ◽  
Activity Based Costing ◽  
Assembly Lines ◽  
Content Type ◽  
Time Changes ◽  
Part Feeding

Purpose This paper aims to propose a combined methodology to help decision makers in evaluating and selecting the most effective part feeding system. Design/methodology/approach As a first step of the methodology, a hierarchical clustering analysis is applied to design a kitting or hybrid feeding system. Second, activity-based costing methodology is applied to determine which system is better according to their costs. Besides, sensitivity analysis is implemented to observe the behavior of the system in case of the takt time changes. Findings Using kitting systems purely can lead to problems because of the big and expensive parts in the mixed-model assembly systems. Therefore, the hybrid feeding policy can provide better solutions for such systems. Research limitations/implications A case study is conducted in a company and the most produced product of the company is considered to design the part feeding system. Results indicated that transportation cost has a large proportion on the total cost and the hybrid feeding policy may be a good solution to reduce this cost. Practical implications The paper includes implications for the design of hybrid feeding systems in lean-based assembly lines. The proposed methodology may be a practical tool for decision makers to design and decide on the part feeding policy. Originality/value Kitting design has not been studied yet to the best of the authors’ knowledge. Besides, there is no certain decision methodology indicating which system is better. In this study, different methods are combined as a new methodology with the purpose of industrial decision-making.

Towards Rapid Redesign: Pattern-Based Design Diagnostics for Large-Scale and Complex Redesign Problems

2005 ◽  
Author(s):  
Li Chen ◽  
Ashish Macwan
Keyword(s):  
Large Scale ◽  
Functional Dependence ◽  
Agile Manufacturing ◽  
Design Model ◽  
Second Phase ◽  
Phase Decomposition ◽  
Two Phase ◽  
Dependency Matrix ◽  
Solution Approach ◽  
Coupling Structure

This paper presents our continued research efforts towards developing a decomposition-based solution approach for rapid computational redesign to support agile manufacturing of evolutionary products. By analogy to the practices used for physical machines, the proposed approach involves two general steps: diagnosis and repair. This paper focuses on the diagnosis step. for which a two-phase decomposition method is developed. The first phase, called design dependency analysis, systematizes and reorganizes the intrinsic coupling structure of the existing design model by analyzing and reordering the design dependency matrix (DDM) used to represent the functional dependence and couplings inherent in the design model. The second phase, called redesign partitioning analysis, uses this result to generate alternative redesign pattern solutions through a three-stage procedure. Each pattern solution delimits the portions of the design model that need to be re-computed. An example problem concerning the redesign of an automobile powertrain is used for method illustration. Our seed paper has presented a method for selecting the optimal redesign pattern solution from the alternatives generated through redesign partitioning analysis, and a sequel paper will discuss how to generate a corresponding re-computation strategy and redesign plan (redesign shortcut roadmap).

An empirical investigation and prioritization of barriers toward implementation of agile manufacturing in the manufacturing industry

2020 ◽  
Vol 33 (1) ◽  
pp. 183-203
Author(s):  
Rahul Kumar ◽  
Kanwarpreet Singh ◽  
Sanjiv Kumar Jain
Keyword(s):  
Factor Analysis ◽  
Large Scale ◽  
Manufacturing Industry ◽  
Agile Manufacturing ◽  
Successful Implementation ◽  
Vikor Method ◽  
Content Type ◽  
Empirical Survey ◽  
Technological Constraints ◽  
Operational Constraints

PurposeThe study aims at empirically investigating and prioritizing the critical barriers for the successful implementation of agile manufacturing in the medium- and large-scale Indian manufacturing industries.Design/methodology/approachA literature review of peer-reviewed journals and discussion with experts is used to identify 17 barriers to the implementation of agile manufacturing. An empirical survey is then conducted to collect data regarding the agile manufacturing barriers and is further analyzed using the factor analysis and vlsekriterijumska optimizacija i kompromisno resenje (VIKOR).FindingsBased on the survey of empirical data, the investigated critical barriers were reduced in five critical categories, as follows: Managerial constraints, technological constraints, human resource–related constraints, operational constraints and organizational culture-related constraints, which are further ranked in terms of their severity using VIKOR. This research advocates the development of a strategy for addressing the most critical barriers instead of focusing on all for the successful implementation of agile manufacturing.Originality/valueThis work contributes to agile manufacturing literature by the structured presentation of the barriers to implement agile manufacturing in the Indian manufacturing industry. It also extends the integrated factor analysis and VIKOR method to investigate and rank the barriers.

The UK's Regional Research Laboratory Initiative

1992 ◽  
Vol 6 (2) ◽  
pp. 83-92
Author(s):  
Christine Tiler
Keyword(s):  
Research Laboratory ◽  
Large Scale ◽  
Research Council ◽  
Regional Research Laboratory ◽  
Regional Research ◽  
Key Factors ◽  
Development Organizations ◽  
The Uk ◽  
Research Centres ◽  
Funding Research

This article examines the development of a series of newly created research centres in the UK. They are of interest because of the novelty of their mission – to conduct research into the techniques and methods of handling large-scale datasets and, over a three-year period with Research Council support, to develop a portfolio of activities and customers able to sustain the Centre when core funding has expired. Christine Tiler examines the range of experience encountered by the Laboratories and draws out key factors which influenced their development. She pays particular attention to those factors which affected their ability to transform themselves into self-funding research and development organizations.

Lessons for Health Service: the Chernobyl Accident and the COVID-19 Pandemic

2020 ◽  
Vol 65 (3) ◽  
pp. 79-84
Author(s):  
A. Bushmanov ◽  
I. Galstyan ◽  
V. Solov'ev ◽  
M. Konchalovsky
Keyword(s):  
Chernobyl Accident ◽  
Large Scale ◽  
Medical Personnel ◽  
The Body ◽  
Key Factors ◽  
Vital Functions ◽  
Medical Institutions ◽  
Emergency Drugs ◽  
To Receive

Purpose: The article is devoted to the analysis of organizational measures to overcome the medical consequences of two large-scale events: the Chernobyl accident on 26.04.1986 and the COVID-19 pandemic. Results: A comparison of the causes, key factors, numbers affected and involved in these events persons, and the availability of the source of knowledge about the clinical picture, diagnosis, prevention and treatment of diseases, developing as a result of radiation exposure and the virus SARS-Cov-2. The article considers the availability of special medical institutions, the infectability of medical workers, the presence of long-term consequences for the health of victims and for the economy. Conclusions: In the development of such catastrophic events, an important role should be played by 1) Timely and adequate information to the population. 2) It is necessary to have a sufficient number of beds that can be repurposed in accordance with the needs and provided with appropriate equipment to support the vital functions of the body. 3) Planned training of qualified medical personnel should be carried out. 4) It is necessary to have stocks of emergency drugs close to the institutions where it is possible to receive victims.

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