Preparation and Fundamental Research of Continuous Through-Porous Pure Aluminum Flat Pipes by Depoling Continuous Casting

2017 ◽  
Vol 898 ◽  
pp. 1220-1230
Author(s):  
Tao Zhang ◽  
Xue Feng Liu ◽  
Shan Shan Kong ◽  
Jia Jie Fan ◽  
Zhen Di Zhang
Keyword(s):  
Surface Roughness ◽  
Continuous Casting ◽  
Pure Aluminum ◽  
Cooling Water ◽  
Mold Temperature ◽  
Fundamental Research ◽  
Core Rod ◽  
And Control ◽  
Measurement And Control

Continuous through-porous pure aluminum flat pipes were prepared continuously by a self-developed depoling continuous casting technology. An online measurement and control of mold temperature at free end of graphite core rods was realized, which was critical for the preparation. The quality of flat pipes was characterized. The results show that the flat pipes could be successfully prepared with the following process parameters: melt with temperature of 750 °C, cooling water with temperature of 20 °C and flow volume of 400 L·h-1, heat insulating mattress with thickness of 2 mm, mold temperature ranged from 635°C to 655°C and continuous casting speed ranged from 1 mm∙min-1 to 4 mm∙min-1. The flat pipe had cross-section dimensions of 14 mm×5 mm, which was aligned unidirectional pore diameter of 3 mm, pore number of 3 and smooth internal and external surface. The pore surfaces of flat pipes became smoother with the reduction of the graphite core rod surface roughness. When the surface roughness of graphite core rods was 0.531 μm and 0.124 μm, the corresponding surface roughness of pores was 0.581 μm and 0.184 μm, respectively. The mold temperature at the free end of graphite core rods was kept at a low thermal temperature range which was 5~25 °C lower than the solidification point of pure aluminum that is necessary for stable depoling continuous casting.

scholarly journals Measurement and analysis of parameters of the precise grinding system

2019 ◽  
Vol 254 ◽  
pp. 01012
Author(s):  
Krzysztof Tyszczuk ◽  
Kazimierz Peszyński ◽  
Adam Mroziński ◽  
Grzegorz Śmigielski
Keyword(s):  
Laboratory Tests ◽  
Pneumatic Conveying ◽  
Air Velocity ◽  
Measurement And Control System ◽  
Diet Supplements ◽  
Measurement And Analysis ◽  
And Control ◽  
Measurement And Control ◽  
Grinding System

The technological process of materials grinding, especially biological material with high oil content, is quite complex. There are several parameters that impact the performance and quality of the process (e.g. temperature, rotational speed). One of them is the air velocity at pneumatic conveying of grinding particles. The phenomena of pneumatic transport of seeds and its impact on product’s quality and grinding capacity is not methodologically recognized so far. The paper presents the construction details of measurement and control system and results of the research obtained during the laboratory tests. The results of the tests and their analysis will be used for design of a commercial precise grinder, which allowed to reach the optimum product’s capacity and quality, constituting the basis for biological diet supplements.

Design of Measurement and Control System for the Rail Fastening Spring Clip Type A and B

2011 ◽  
Vol 299-300 ◽  
pp. 1194-1197
Author(s):  
Yu Peng Yao ◽  
Ying Shi ◽  
Yong Ping Song
Keyword(s):  
Control System ◽  
Geometric Parameter ◽  
Type A ◽  
Geometric Parameters ◽  
Measuring Instrument ◽  
Measurement And Control System ◽  
And Control ◽  
Measurement And Control

The measurement and control system is designed to control the measuring instrument which measures the geometric parameters of rail fastening spring clips. The structure and work principle of the measurement and control system are presented. Nine geometric parameters of a rail fastening spring clip which is installed only one time can be measured atomically. The limited errors of measured parameters are largely smaller than one tenth of the geometric parameter tolerance. It only spends 40 seconds to measure a rail fastening spring clip. It improves the quality of the rail fastening spring clip production and ensures that it is safe and reliably used in railway.

scholarly journals Application of Laser Vibrometer to the Measurement and Control of Cable Tensile Forces in Cable-Stayed Bridges

2012 ◽  
Vol 8 (10) ◽  
pp. 810682 ◽  
Author(s):  
Cheol-Hwan Kim ◽  
Byung-Wan Jo ◽  
Jin-Taek Jun
Keyword(s):  
Tensile Force ◽  
Indirect Measurement ◽  
Laser Vibrometer ◽  
Data Logger ◽  
Long Span Bridges ◽  
Long Span ◽  
Tensile Forces ◽  
And Control ◽  
Measurement And Control

The tensile forces acting on the cable of long-span bridges are one of the most important factors since they reflect not only the structural stability of cables but also the overall quality of construction. Currently, indirect measurement using accelerometers attached to the surface of the cable is widely used to measure the natural frequency of cable. The frequency obtained from the accelerometer is converted to the tensile force of the cable. However, it sometimes requires many hazardous labors such as attaching the device on the surface of cable and wiring it with data logger, which could hinder the safety of workers during the erection of cables. In this study, a method using laser vibrometer is introduced to measure the tensile forces on cables at a distance. In addition, this study developed a unique postanalysis computer program that can calculate the tensile forces in real time. Compared with the values obtained from the accelerometers, the laser vibrometer system provided accurate and reliable matching.

scholarly journals The prototype of a thermoregulatory system for measurement and control of temperature inside prosthetic socket

2016 ◽  
Vol 40 (6) ◽  
pp. 751-755 ◽  
Author(s):  
Kamiar Ghoseiri ◽  
Yong Ping Zheng ◽  
Louis Lee Tat Hing ◽  
Mohammad Reza Safari ◽  
Aaron KL Leung
Keyword(s):  
Thermal Equilibrium ◽  
Thermal Inertia ◽  
Thermal Capacity ◽  
Residual Limb ◽  
Phantom Model ◽  
Prosthetic Socket ◽  
Thermoregulatory System ◽  
And Control ◽  
Measurement And Control

Background and aim: Thermal related problems with prostheses are common complaints of amputee people. This article aims to introduce a thermoregulatory technique as a potential solution for those problems in prostheses wearers. Technique: A smart thermoregulatory system was designed, manufactured, and installed on a phantom model of a prosthetic socket. It captured temperature data from 16 sensors positioned at the interface between the phantom model and a silicone liner and used their average for comparison with a defined set temperature to select required heating or cooling functions for thermal equilibrium. A thin layer of Aluminum was used to transfer temperature between thermal pump and different sites around the phantom model. Discussion: The feasibility of this thermoregulatory technique was confirmed by its ability to provide thermal equilibrium. Further investigations to improve the design of thermoregulatory system are necessary including temperature transfer element and power consumption based on thermal capacity and thermal inertia of the residual limb. Clinical relevance The smart thermoregulatory system by providing thermal equilibrium between two sides of a prosthetic silicone liner can control residual limb skin temperature and sweating. Consequently, it can improve quality of life in amputee people.

scholarly journals Measurement Data Processing with the Use of Art Networks

2018 ◽  
Vol 28 (2) ◽  
pp. 186-195
Author(s):  
Maria Mrówczyńska ◽  
Jacek Sztubecki
Keyword(s):  
Measurement Data ◽  
Strong Impact ◽  
Resonance Theory ◽  
Adaptive Resonance ◽  
Control Networks ◽  
Vertical Displacements ◽  
Processing Measurement ◽  
And Control ◽  
Measurement And Control

Abstract ART (Adaptive Resonance Theory) networks were invented in the 1990s as a new approach to the problem of image classification and recognition. ART networks belong to the group of resonance networks, which are trained without supervision. The paper presents the basic principles for creating and training ART networks, including the possibility of using this type of network for solving problems of predicting and processing measurement data, especially data obtained from geodesic monitoring. In the first stage of the process of creating a prediction model, a preliminary analysis of measurement data was carried out. It was aimed at detecting outliers because of their strong impact on the quality of the final model. Next, an ART network was used to predict the values of the vertical displacements of points of measurement and control networks stabilized on the inner and outer walls of an engineering object.

scholarly journals The Stand of Horizontal Continuous Casting of Al and its Alloys

2013 ◽  
Vol 13 (3) ◽  
pp. 113-118 ◽  
Author(s):  
T. Wróbel ◽  
J. Szajnar ◽  
D. Bartocha ◽  
M. Stawarz
Keyword(s):  
Continuous Casting ◽  
Induction Furnace ◽  
Structure Refinement ◽  
Pure Aluminum ◽  
Electromagnetic Stirring ◽  
Metal Bath ◽  
Horizontal Continuous Casting ◽  
Continuous Ingot ◽  
Continuous Casting Mould

Abstract In paper is presented idea of construction and influence of selected parts of stand of horizontal continuous casting on quality of pure Al and AlSi2 alloy ingots. The main parts of the made stand belong to induction furnace, which is also tundish, water cooled continuous casting mould, system of recooling, system of continuous ingot drawing and cutting. Mainly was considered influence of electromagnetic stirrer, which was placed in continuous casting mould on refinement of ingots structure. Effect of structure refinement obtained by influence of electromagnetic stirring was compared with refinement obtained by use of traditional inoculation, which consists in introducing of additives i.e. Ti and B to metal bath. The results of studies show possibility of effective refinement of Al and AlSi2 alloy primary structure, only with use of horizontal electromagnetic field and without necessity of application of inoculants. This method of inoculation is important, because inoculants decrease the degree of purity and electrical conductivity of pure aluminum and moreover are reason of point cracks formation during rolling of ingots.

Sign in / Sign up

Export Citation Format

Share Document