scholarly journals Continuous Casting and Rolling Technology at MKM Mansfelder Kupfer und Messing GmbH – Optimisation of the Surface Quality for Conti-M® Strip

2016 ◽  
Vol 854 ◽  
pp. 255-259
Author(s):  
Klaus Dieter Palm ◽  
Hendrik Busch ◽  
Axel Dusdorf
Keyword(s):  
Control System ◽  
Continuous Casting ◽  
Surface Quality ◽  
Rolling Process ◽  
Process Control System ◽  
Quality Development ◽  
The Impact ◽  
Rolling Technology ◽  
Process Product

Using Conti-M® which is a globally unique technology for producing cast-rolled copper strips, MKM has been able to link and optimise the continuous casting and rolling process together with the surface quality of milled strips. The last 15 years have seen many targeted projects for process, product and quality development. In this article, the process related challenges to optimise the surface quality of casting strip will be highlighted. We will present a process control system and the impact it had in the optimisation of the surface quality.

scholarly journals Construction of Nonsinusoidal Oscillation Waveform Function and Technological Parameters for Continuous Casting Mold

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Chao Zhou ◽  
Xingzhong Zhang ◽  
Fang Wang ◽  
Subo Ren
Keyword(s):  
Continuous Casting ◽  
Surface Quality ◽  
Sinusoidal Oscillation ◽  
Technological Parameters ◽  
Continuous Casting Mold ◽  
Synchronous Control ◽  
Limit Value ◽  
Steel Continuous Casting ◽  
The Impact

Nonsinusoidal oscillation techniques can shorten the negative strip time and improve the slab surface quality in the process of steel continuous casting. But the acceleration of nonsinusoidal oscillation is higher than that of the sinusoidal oscillation. So it is easy to result in the impact for the mold movement. To solve this problem, a nonsinusoidal oscillation waveform function of mold was constructed, which had good dynamic characteristics. And the smaller acceleration can reduce the impact of the oscillator. By analyzing the parameters of oscillation technology, the calculation method of each oscillation technological parameter for seven section functions was presented and the multitechnological parameter curves were given. Based on the technological parameters of sinusoidal oscillation, a synchronous control model of nonsinusoidal oscillation was determined. The results show that the parameters can satisfy the limit value in theory, which can enhance the casting speed, surface quality of slab, and provide reference for further practice in industry.

Experimental study on surface quality of silicon ingots prepared by electromagnetic continuous casting

2012 ◽  
Vol 15 (4) ◽  
pp. 340-346 ◽  
Author(s):  
Feng Huang ◽  
Ruirun Chen ◽  
Jingjie Guo ◽  
Hongsheng Ding ◽  
Yanqing Su ◽  
...  
Keyword(s):  
Experimental Study ◽  
Continuous Casting ◽  
Surface Quality ◽  
Electromagnetic Continuous Casting

scholarly journals Analysis of the surface quality of polycaprolactam 3D prints enriched with carbon and glass fiber

2021 ◽  
Vol 338 ◽  
pp. 01005
Author(s):  
Damian Dzienniak ◽  
Jan Pawlik
Keyword(s):  
Glass Fiber ◽  
Surface Quality ◽  
Fused Deposition Modeling ◽  
Polyamide 6 ◽  
Fiber Glass ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
The Impact ◽  
The Relationship

Additive manufacturing has been gaining popularity and availability year by year, which has resulted in its dynamic development. The most common 3D printing method as of today, FDM (Fused Deposition Modeling), owing to its peculiarity, does not always guarantee producing objects with low surface roughness. The authors of the present article have taken on the analysis of the impact of FDM printing on the roughness of the filament thus processed. They also investigate the relationship between the roughness of the unprocessed filament (made of polycaprolactam, that is, polyamide 6 or PA6) with admixtures of other materials (carbon fiber, glass fiber) and the surface quality of the manufactured object. The main subject of the analysis is the side surfaces of 3D prints, as it is their quality that is usually directly dependent on many factors connected with the process of the laying of the consecutive layers. The authors check step by step whether there exists a pronounced relationship between the roughness of the original filament material and the roughness of the obtained surface.

scholarly journals DEVELOPMENT OF A SYSTEM FOR AUTOMATED CONTROL OF THE BRICK FIRING PROCESS IN A RING FURNACE

2020 ◽  
pp. 5-11
Author(s):  
А. У. Тахгириев ◽  
А. С-С. Хамзаев ◽  
У. А. Вагапов
Keyword(s):  
Control System ◽  
Block Diagram ◽  
Process Control System ◽  
Firing Process ◽  
Development Environment ◽  
Automated Control ◽  
Automated Control System ◽  
Automated Process Control System ◽  
Ring Furnace

В данной статье приводится описание технологического процесса обжига керамического кирпича в кольцевой печи Гофмана. Проанализирован существующий уровень автоматизации объекта. Приведено обоснование для внедрения автоматизированной системы управления процессом обжига кирпича и вариант структурной схемы системы автоматизированного управления. Также представлены основные характеристики интегрированной среды разработки SIMPLE-SCADA, выбранной для организации операторского уровня автоматизированной системы управления технологическим процессом. Для определения показателей качества системы определены прямые и косвенные оценки качества функционирования системы управления. This article describes the technological process of firing ceramic bricks in a ring Hoffmann furnace. The existing level of object automation is analyzed. The justification for the introduction of an automated control system for the brick firing process and a variant of the block diagram of the automated control system is given. The main characteristics of the integrated development environment SIMPLE-SCADA, selected for the organization of the operator level of the automated process control system, are also presented. To determine the quality indicators of the system, direct and indirect assessments of the quality of the management system are determined.

Reducing the Impact of Source Information Uncertainty in Intelligent Automated Thermal Process Control Systems in Ensuring Reliable Operation of Power Equipment

Vestnik MEI ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 78-87
Author(s):  
Edik K. Arakelyan ◽  
◽  
Ivan A. Shcherbatov ◽  
Keyword(s):  
Control System ◽  
Process Control ◽  
Control Systems ◽  
Process Control System ◽  
Power Equipment ◽  
Source Information ◽  
Equipment Operation ◽  
Process Control Systems ◽  
Automated Process ◽  
The Impact

The uncertainty of the source information is used to solve key tasks in an intelligent automated thermal process control system affects the calculation of control actions, the implementation of equipment optimal operating modes and, as a result, leads to degraded reliability. As a rule, this type of information can be qualitative (the use of expert knowledge) or quantitative in nature. In this regard, it is extremely important to reduce the impact of uncertainty. The aim of the study is to identify the types and origins of uncertainty in the source information used by an intelligent automated process control system and to develop approaches to reduce its impact on the reliability of power equipment operation. The approaches used to ensure the specified indicators of reliability, efficiency and environmental friendliness in modern intelligent automated process control systems are based on predictive strategies, according to which the technical condition of equipment and specific degradation processes are predicted. This means that various types of uncertainty can have a significant negative impact. To reduce the influence of uncertainty of the initial information that affects the reliability of power equipment operation, the use of artificial neural networks is proposed. Their application opens the possibility to predict the occurrence of equipment defects and failures based on retrospective data for specified forecast time intervals. A method for reducing the impact of anomalies contained in the source information used in an intelligent process control system for energy facilities is demonstrated. Data omissions and outliers are investigated, the elimination of which reduces the impact of uncertainty and improves the quality of solving key problems in intelligent automated process control systems. Experimental studies were carried out that made it possible to identify the mathematical methods for removing omissions and anomalies in the source information in the best way. Methodological aspects of eliminating various types of uncertainty that exist in managing of power facilities by means of intelligent automated process control systems at the key stages of the power equipment life cycle are described.

scholarly journals Impact of Structural Defects on the Surface Quality of Hardwood Species Sliced Veneers

2020 ◽  
Vol 10 (18) ◽  
pp. 6265
Author(s):  
Vasiliki Kamperidou ◽  
Efstratios Aidinidis ◽  
Ioannis Barboutis
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Wood Species ◽  
Research Work ◽  
Structural Defects ◽  
Material Surface ◽  
Typical Structure ◽  
Hardwood Species ◽  
The Impact

The surface roughness constitutes one of the most critical properties of wood and wood veneers for their extended utilization, affecting the bonding ability of the veneers with one another in the manufacturing of wood composites, the finishing, coating and preservation processes, and the appearance and texture of the material surface. In this research work, logs of five significant European hardwood species (oak, chestnut, ash, poplar, cherry) of Balkan origin were sliced into decorative veneers. Their surface roughness was examined by applying a stylus tracing method, on typical wood structure areas of each wood species, as well as around the areas of wood defects (knots, decay, annual rings irregularities, etc.), to compare them and assess the impact of the defects on the surface quality of veneers. The chestnut veneers presented the smoothest surfaces, while ash veneers, despite the higher density, recorded the highest roughness. In most of the cases, the roughness was found to be significantly lower around the defects, compared to the typical structure surfaces, probably due to lower porosity, higher density and the presence of tensile wood. The results reveal that the presence of defects does not affect the roughness of the veneers and increases neither the processing requirements of the veneer sheets before finishing, nor the respective production cost of veneers and the veneer-based wood panels. The high utilization prospects of the examined wood species in veneer production, even those bearing various defects, is highlighted.

scholarly journals Surface Roughness Investigation of Poly-Jet 3D Printing

Mathematics ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1758
Author(s):  
Nectarios Vidakis ◽  
Markos Petousis ◽  
Nikolaos Vaxevanidis ◽  
John Kechagias
Keyword(s):  
Surface Roughness ◽  
3D Printing ◽  
Surface Quality ◽  
Back Propagation ◽  
Physical Models ◽  
Layer By Layer ◽  
Linear Regression Models ◽  
Feed Forward Back Propagation ◽  
The Impact

An experimental investigation of the surface quality of the Poly-Jet 3D printing (PJ-3DP) process is presented. PJ-3DP is an additive manufacturing process, which uses jetted photopolymer droplets, which are immediately cured with ultraviolet lamps, to build physical models, layer-by-layer. This method is fast and accurate due to the mechanism it uses for the deposition of layers as well as the 16 microns of layer thickness used. Τo characterize the surface quality of PJ-3DP printed parts, an experiment was designed and the results were analyzed to identify the impact of the deposition angle and blade mechanism motion onto the surface roughness. First, linear regression models were extracted for the prediction of surface quality parameters, such as the average surface roughness (Ra) and the total height of the profile (Rt) in the X and Y directions. Then, a Feed Forward Back Propagation Neural Network (FFBP-NN) was proposed for increasing the prediction performance of the surface roughness parameters Ra and Rt. These two models were compared with the reported ones in the literature; it was revealed that both performed better, leading to more accurate surface roughness predictions, whilst the NN model resulted in the best predictions, in particular for the Ra parameter.

Analysis of the Assembly Joint at Deformation of Matched Objects

2019 ◽  
Vol 952 ◽  
pp. 330-338
Author(s):  
Marcela Bučányová ◽  
Miriam Matúšová ◽  
Erika Hrušková
Keyword(s):  
Surface Quality ◽  
Specific Activity ◽  
Technological Equipment ◽  
Time Performance ◽  
Final Surface ◽  
The Impact ◽  
Material Tool

Maintenance is a system-specific activity that the purpose of which is to maintain or to increase time, performance and quality of machines and equipment use. The demand for technological equipment is still rising, resulting in often complicated and lengthy repairs. It is necessary to analyze the tools used in the construction of assembly joints and to describe the deficiencies that may occur during assembly. When contacting a material tool using a particular technology and assembly, it is necessary to analyze the impact on the final surface quality of the material.

1450mm Five-Stand Tandem Cold Mill Process Control System

2014 ◽  
Vol 602-605 ◽  
pp. 1248-1251
Author(s):  
He Nan Bu ◽  
Zhu Wen Yan ◽  
Wen Peng ◽  
Shu Zong Chen ◽  
Dian Hua Zhang
Keyword(s):  
Control System ◽  
Process Control ◽  
Rolling Process ◽  
Process Control System ◽  
Rolled Sheet ◽  
Structural Framework ◽  
Stable Production ◽  
Tandem Cold Mill ◽  
And Function ◽  
Cold Mill

The process control system for tandem cold mill is the core of the production line control system. Its operating status influences the stable production of strip directly. In this paper a tandem cold rolling process control system of cold-rolled sheet plant was taken as an object, the structural framework of control system was designed, the composition and function was introduced.

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