scholarly journals MANIFESTAÇÕES PATOLÓGICAS E CONTROLE DE QUALIDADE NA MONTAGEM E FABRICAÇÃO DE ESTRUTURAS METÁLICAS

2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Caio César Sacchi ◽  
Alex Sander Clemente de Souza
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Production Process ◽  
Structural Steel ◽  
Early Identification ◽  
Steel Structure ◽  
Steel Structures ◽  
Flow Chart ◽  
Efficient Planning ◽  
Technological Study

RESUMO: Este trabalho apresenta um estudo científico e tecnológico sobre o controle de qualidade na fabricação e montagem de estruturas metálicas, elaborado por meio da análise e interpretação de informações obtidas em levantamentos bibliográficos, visitas técnicas e entrevistas à empresas do setor, evidenciando o conhecimento da literatura existente. Sendo assim, serão abordadas as diversas etapas da fabricação e da montagem das estruturas metálicas, assim como ensaios utilizados para a garantia da qualidade na fabricação. A pesquisa tem como objetivos, definir critérios de inspeção durante a fabricação e a montagem das estruturas metálicas, para identificação prematura de manifestações patológicas, apresentar os principais sintomas patológicos encontradas em estruturas de aço, estabelecendo suas origens e causas, expor um fluxograma sobre o processo de produção de uma estrutura metálica, indicando os principais pontos de checagem de desempenho e, por fim, analisar algumas manifestações patológicas, indicando as falhas no processo de produção. Conclui-se que existem cuidados a serem observados para não cometer erros construtivos, facilmente evitáveis por meio de planejamento e fiscalização eficientes. O intuito do estudo é promover o intercâmbio dos resultados da pesquisa com o setor produtivo e colaborar na revisão e elaboração de normas. ABSTRACT: This paper is a scientific and technological study about quality control in the fabrication and assembly of steel structures, developed through the analysis and interpretation of information obtained from literature surveys, technical visits and interviews with companies in the sector, highlighting the knowledge the existing literature. Therefore, they will discuss the processes for obtaining structural steel and its properties, the various stages of fabrication and assembly of steel structures, as well as tests used for quality assurance in fabrication. The survey aims to define inspection criteria for the fabrication and assembly of steel structures for early identification of pathological manifestations, present the main pathological symptoms found in steel structures, establishing its origins and causes, exposing a flow chart of the process production of a steel structure showing the main performance checkpoints and, finally, to analyze certain pathological events, indicating failures in the production process. It is concluded that there are precautions to be observed not to make constructive errors, easily preventable through efficient planning and supervision. The study's aim is to promote the exchange of research results to the productive sector and assist in the review and development of standards.

scholarly journals Desain Alat Uji Impak Jatuh Bebas Untuk Pengujian Baja Struktur

2020 ◽  
Vol 1 (2) ◽  
pp. 29-37
Author(s):  
Dailami Dailami ◽  
Samsul Bahri ◽  
Hamdani Hamdani
Keyword(s):  
Structural Steel ◽  
Impact Test ◽  
Steel Structure ◽  
Steel Structures ◽  
Free Fall ◽  
Operating Conditions ◽  
Impact Testing ◽  
Test Tool ◽  
Price Momentum ◽  
The Impact

Abstract Impact testing is a test to measure material resistance to shock loads (dynamic). Impact testing simulates the material operating conditions often encountered when the load does not always occur slowly but rather comes suddenly. The impact test equipment to be designed in this study is a free-fall impact test. This impact test tool utilizes the mass of the object and the force of gravity. This test aims to analyze the effect of free fall impact loading on steel structures dropped from 1.5m height. The steps taken in this study include testing and data collection to determine the energy absorbed, the impact price, momentum, impulse and toughness in steel structure material when given a shock load. In this free fall impact test, weight load is at (m) = 2.4 kg with an altitude distance of (h) = 1.5m. The test results showed that the maximum absorbable energy of structural steel is at (E) = 352.94 J, the maximum impact value of structural steel at (HI) = 8.82 J / mm2, the maximum momentum of structural steel at (M) 39.04 kg.m / s and the maximum implant steel structure at (I) 39.04 Ns. Mechanical behaviour is indicated by the bending of the specimen due to impact collision (striker) when testing is done. Keywords: Free-fall impact, Structure steel __________________________ Abstrak Pengujian impak merupakan suatu pengujian untuk mengukur ketahanan bahan terhadap beban kejut (dinamis). Pengujian impak mensimulasikan kondisi operasi material yang sering ditemui dimana beban tidak selamanya terjadi secara perlahan-lahan melainkan datang secara tiba-tiba. Alat uji impak yang akan dirancang dalam penelitian ini merupakan alat uji impak jatuh bebas. Alat uji impak ini memanfaatkan massa benda serta gaya gravitasi. Pengujian ini bertujuan untuk menganalisa pengaruh pembebanan impak jatuh bebas pada baja struktur yang dijatuhkan dari ke tinggian 1,5m. Langkah yang dilakukan dalam penelitian ini meliputi pengujian dan pengambilan data untuk mengetahui energi yang diserap, harga impak, momentum, implus dan ketangguhan pada material baja struktur saat diberi beban kejut. Pada pengujian impak jatuh bebas ini, mempunyai jarak dan berat beban yaitu pada beban (m) = 2,4 kg dengan jarak ketinggian (h) = 1,5m . Dari hasil pengujian yang diperoleh energi yang diserap maksimum baja struktur (E) = 352,94 J, harga impak maksimum baja struktur (HI) = 8,82 J/mm2, momentum maksimum baja struktur (M) 39,04 kg.m/s dan implus maksimum baja struktur (I) 39,04 Ns. Perilaku mekanis ditunjukkan dengan terjadinya pembengkokan pada spesimen akibat benturan Beban (striker) saat pengujian dilakukan. Kata Kunci: Impak jatuh bebas, Baja struktur __________________________

scholarly journals Adapting Disruptive Applications in Managing Quality Control Systems in Intelligence Manufacturing

2021 ◽  
Author(s):  
Amusan Lekan ◽  
Clinton Aigbavboa ◽  
Moses Emetere ◽  
James Owolabi
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Production Process ◽  
Control Systems ◽  
Manufacturing Process ◽  
Survey Methods ◽  
Intelligent Manufacturing ◽  
Manufacturing Companies ◽  
Major Trend ◽  
Analytical Tools

Controlling quality has become a major trend in the circle of manufacturers and production managers that engage in intelligent manufacturing all over the world, on account of industry 4.0, in recent times. Intelligent manufacturing therefore is the use of advanced applications, analytics, sensors and Internet of Things (IoT) to improve manufacturing. The aim of the study is to carry out a study on application of disruptive application in managing quality system in intelligent manufacturing with a view to improving manufacturing process in organizations. Survey methods was used in collating responses from production managers of manufacturing companies at selected locations censoring production managers and supervisors on some parameters such as areas of disruptions in the quality assurance monitoring and calibration in production process, issues and challenges involved in quality control systems in manufacturing, Man-Whitney U Test, T-test, Pearson’s Test were used to analyze the collated data. Also, this study presents advanced analytical tools and applications to improve quality in manufacturing process. The study finally presents areas of disruptions in the quality assurance monitoring and calibration in production process, issues and challenges involved in quality control systems in manufacturing, emerging areas of application and recommendation for improvement.

Studi Kualitas Puding Melalui Pendekatan Six Sigma Studi Kasus Di Pt. Keong Nusantara Abadi

2019 ◽  
Vol 1 (1) ◽  
pp. 44
Author(s):  
Rony Trizudha ◽  
Sri Rahayuningsih ◽  
Ana Komari
Keyword(s):  
Quality Control ◽  
Quality Improvement ◽  
Production Process ◽  
Product Quality ◽  
Six Sigma ◽  
Improve Quality ◽  
High Productivity ◽  
Fierce Competition ◽  
And Control ◽  
Technology Advances

As technology advances at this time, players in business are aware of the importance of product quality in the increasingly fierce competition in the industrial world due to the emergence of many similar companies. Therefore, companies must be able to compete to meet customer desires and try to retain customers. To maintain customers and their marketing areas, companies must have high competitiveness in order to survive by prioritizing quality improvement, increasing efficiency and increasing productivity to improve quality because by increasing quality, products can be accepted among consumers so that company goals can be fulfilled. Therefore, the company must carry out effective quality control which will result in high productivity, lower overall cost of making goods and the factors that cause production failure to be minimized. To improve quality, use the six sigma method, DMAIC and seven tools so that it can be known the cause of the damage and what actions are taken so that there needs to be a controversy to stabilize the processes of the production process so that we can know what percentage of damage and what factors cause damage, therefore there must be measurements and recommendations for improvement and control to reduce the causes From the analysis, it was found that the dent cup was 20.36%, the lid was 21.36% less dense, the lid was damaged in the finished product 18.72%, the cup was 19.28% less thick, the packaging was flexible 20.55%Seiring kemajuan teknologi pada saat ini pelaku di bisnis menyadari akan pentingnya kualitas produk dalam persaingan dunia industri yang semakin ketat karena banyak bermunculan perusahaan-perusahaan sejenis. Oleh sebab itu perusahaan harus dapat bersaing untuk memenuhi keinginan  pelanggan dan berusaha dapat mempertahankan pelanggan. Untuk mempertahankan pelangan dan wilayah pemasaranya perusahaan-perusahaan harus mempunyai daya saing yang tinggi untuk dapat bertahan dengan mengutamakan peningkatan mutu, peningkatan efisiensi dan peningkatan produktivitas untuk meningkatkan kualitas karena dengan peningkatan kualitas, produk dapat diterima di kalangan konsumen sehingga tujuan perusahaan dapat terpenuhi. Maka dari itu perusahaan harus melakukan pengendalian kualitas yang efektif akan menghasilkan produktivitas yang tinggi, biaya pembuatan barang keseluruhan yang lebih  rendah serta  faktor-faktor yang menyebabkan kegagalan produksi akan dapat ditekan sekecil mungkin. Untuk meningkatkan kualitas mengunakan metode six sigma, DMAIC dan seven tools agar dapat diketahui penyebab  kerusakan  dan  tindakan  apa  saja  yang dilakukan sehingga perlu ada kontror untuk menstabilkan  peoses proses produksi sehinga dapat di ketahui berapa persen  kerusakan dan faktor-faktor apa saja yang menyebabkan  kerusakan maka dari itu harus ada pengukuran dan  rekomendasi perbaikan serta melakukan kontrol untuk mengurangi penyebab kerusakan. Dari hasil analisis  di ketahui cup  penyok 20,36%, lid kurang  rapat  21,36%, lid  rusak  pada produk jadi 18,72%,cup kurang tebal 19,28 %kemasan lentur 20,55%

Dynamic Characteristics of Base-Isolated Steel Frame under Seismic Ground Motion

2011 ◽  
Vol 255-260 ◽  
pp. 2341-2344
Author(s):  
Mohammad Saeed Masoomi ◽  
Siti Aminah Osman ◽  
Ali Jahanshahi
Keyword(s):  
Ground Motion ◽  
Base Isolation ◽  
Time History ◽  
Steel Structure ◽  
Steel Structures ◽  
Steel Frame ◽  
Nonlinear Time History Analysis ◽  
Seismic Load ◽  
Vector Method ◽  
Seismic Ground Motion

This paper presents the performance of base-isolated steel structures under the seismic load. The main goals of this study are to evaluate the effectiveness of base isolation systems for steel structures against earthquake loads; to verify the modal analysis of steel frame compared with the hand calculation results; and development of a simulating method for base-isolated structure’s responses. Two models were considered in this study, one a steel structure with base-isolated and the other without base-isolated system. The nonlinear time-history analysis of both structures under El Centro 1940 seismic ground motion was used based on finite element method through SAP2000. The mentioned frames were analyzed by Eigenvalue method for linear analysis and Ritz-vector method for nonlinear analysis. Simulation results were presented as time-acceleration graphs for each story, period and frequency of both structures for the first three modes.

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