scholarly journals Digital twin of the process of thermal cutting of flat material into figured parts

2021 ◽  
Author(s):  
M.A. Verkhoturov ◽  
G.N. Verkhoturova ◽  
D.R. Zaripov ◽  
N.V. Kondratyeva ◽  
S.S. Valeev
Keyword(s):  
Temperature Change ◽  
Thermal Effects ◽  
Computational Experiment ◽  
Cutting Tool ◽  
Sheet Material ◽  
The State ◽  
Technological System ◽  
Digital Twin ◽  
Thermal Cutting ◽  
Logical Representation

The designing a digital twin of the process of the thermal cutting of sheet material using laser or gas equipment for its figure cutting is considered. The solution to the problem of optimizing the path of the cutting tool taking into account the thermal effects on the material to be cut is discussed. The solution of the problem of modeling the temperature change of the material to be cut is considered on the basis of a discrete - logical representation of information about the state of the technological system of sheet cutting. The results of a computational experiment are presented.

scholarly journals Digital Twin of a Cutting Tool

Procedia CIRP ◽  
2018 ◽  
Vol 72 ◽  
pp. 215-218 ◽  
Author(s):  
Darya Botkina ◽  
Mikael Hedlind ◽  
Bengt Olsson ◽  
Jannik Henser ◽  
Thomas Lundholm
Keyword(s):  
Cutting Tool ◽  
Digital Twin

scholarly journals Construction supervision at the facilities renovation

2019 ◽  
Vol 91 ◽  
pp. 08044 ◽  
Author(s):  
Azariy Lapidus ◽  
Dmitry Topchiy
Keyword(s):  
Systematic Approach ◽  
The State ◽  
Control Measures ◽  
Technological System ◽  
Deterministic System ◽  
Industrial Facilities ◽  
Quantitative Characteristics ◽  
State Construction ◽  
Construction Supervision

Article justify the need for a systematic approach to the formation of uniform requirements for the volume and level of construction supervision carried out in the conversion of industrial facilities. Author determines the factors that affect the safety, is the quantitative characteristics of various types of control measures carried out by specialists of state construction supervision both at the facility and in the office. As a hypothesis, author considers the possibility of forming a single deterministic system that provides objective supervision during the conversion and does not create an excessive burden for both the state and the developer. As a result, the existing legislation in the field of state construction supervision is incomplete and partly contradictory. In this article the necessity of formation of scientifically grounded hierarchical organizational and technological system of construction supervision is defined.

Digital twin for cutting tool: Modeling, application and service strategy

2020 ◽  
Author(s):  
Yang Xie ◽  
Kunlei Lian ◽  
Qiong Liu ◽  
Chaoyong Zhang ◽  
Hongqi Liu
Keyword(s):  
Cutting Tool ◽  
Service Strategy ◽  
Digital Twin

Adaptation as a Mechanism for Gain Control in an Insect Thermoreceptor

2008 ◽  
Vol 100 (4) ◽  
pp. 2137-2144 ◽  
Author(s):  
Harald Tichy ◽  
Harald Fischer ◽  
Ewald Gingl
Keyword(s):  
Temperature Change ◽  
Thermal Effects ◽  
Gain Control ◽  
Input Function ◽  
High Gain ◽  
Oscillation Period ◽  
Rate Of Change ◽  
Temperature Changes ◽  
Precise Information ◽  
Instantaneous Temperature

Adaptation controls the gain of the input-function of the cockroach's cold cell during slowly oscillating changes in temperature. When the oscillation period is long, the cold cell improves its gain for the rate of temperature change at the expense of its ability to code instantaneous temperature. When the oscillation period is brief, however, the cold cell reduces this gain and improves its sensitivity for instantaneous temperature. This type of gain control has an important function. When the cockroach ventures from under cover and into moving air, the cold cell is confronted constantly with brief changes in temperature. To be of any use, a limit in the gain for the rate of change seems to be essential. Without such a limit, the cold cell will always indicate temperature change. The decrease in gain for the rate of change involves an increase in gain for instantaneous temperature. Therefore the animal receives precise information about the temperature at which the change occurs and can seek an area of different temperature. If the cockroach ventures back under cover, the rate of change will become slow. In this situation, a high gain improves the ability to signal slow temperature changes. The cockroach receives the early warning of slow fluctuations or even creeping changes in temperature. A comparison of the cold cell's responses with the temperature measured inside of small, cylindrical model objects indicates that coding characteristic rather than passive thermal effects of the structures enclosing the cold cell are responsible for the observed behavior.

V. On the heat disengaged during metallic substitutions

1848 ◽  
Vol 138 ◽  
pp. 91-103
Keyword(s):  
Thermal Effects ◽  
The State ◽  
The Other ◽  
Dilute Solution ◽  
Present Communication ◽  
Philosophical Magazine ◽  
Negative Element ◽  
General Law ◽  
Metallic Element ◽  
Quantity Of Heat

In the present communication I propose to give an account of some new investiga­tions on the heat disengaged in chemical actions, which may be considered a continuation of my former inquiries on the same subject. The greater number of the experiments to be detailed in this paper were made some years ago, and the con­clusion at which I arrived was briefly announced in the Philosophical Magazine for August 1844. More recently, I have taken an opportunity to repeat many of my former experiments and to add new ones on the same subject, all of which confirm the general results formerly obtained. Having originally observed that although a very limited number of bases (potash, soda, barytes and strontia) develope nearly the same quantity of heat, when a chemical equivalent of each enters into combination with an acid, yet that the greater number of bases differ most widely from one another, when so treated, while on the other hand, that different acids (taken in the state of dilute solution) produce with the same base nearly the same amount of heat, I ventured to draw the general inference that the thermal effects produced are more intimately connected with the basic, or electro-positive, than with the acid, or electro-negative element. In conformity with this view, it appeared probable that in the decomposition of solutions of neutral salts by the addition of bases or metallic bodies, the nature of the acid or electro-negative element of the compound would exercise no special influence on the result. I have already endeavoured to establish by experiment the truth of this principle in the case of basic substitutions, and, in the present memoir, I propose to extend the same general law to the other case, in which one metallic element re­places, or is substituted for another.

scholarly journals Análise da origem das manifestações patológicas em pavimento de concreto de uma rodovia pelo método dos elementos finitos: estudo de caso

2014 ◽  
Vol 4 (3) ◽  
pp. 172-181
Author(s):  
F. Bolina ◽  
B. Tutikian
Keyword(s):  
Structural Analysis ◽  
Finite Elements ◽  
Thermal Effects ◽  
Rio Grande ◽  
The State ◽  
Rio Grande Do Sul ◽  
Method Of Finite Elements ◽  
Pavement Concrete

RESUMONo que tange assuntos concernentes à infraestrutura, observa-se que a rodovia brasileira Mário Quintana, a chamada ERS-118, situada no estado do Rio Grande do Sul, Brasil, anuncia-se em circunstâncias alarmantes de conservação e trafegabilidade devido ao elevado grau de deterioração do pavimento. O objetivo deste trabalho é analisar as possíveis causas que culminaram no surgimento de manifestações patológicas nas placas de concreto desta rodovia. O estudo baseou-se na análise estrutural destes elementos. Para tanto, este trabalho fundamentou-se no método de dimensionamento por elementos finitos e na subsequente análise dos resultados pela correlação entre tensões produzidas versus número admissível de eixos passantes. O estudo foi dividido em três partes: (1º) método de análise estrutural das placas, (2º) discussão dos resultados e (3º) conclusão. Como resultado, verificou-se que muitas das manifestações patológicas podem ter provindo do efeito térmico resultante sobre as placas.Palavras clave: Patologia; Pavimentos; Concreto.ABSTRACTRegarding issues pertaining to infrastructure, it is observed that the Brazilian’s highway Mário Quintana, call ERS-118, located in the state of Rio Grande do Sul , Brazil , announces in alarming conservations circumstances and trafficability due to the high deterioration degree of the pavement . The objective of this work is to analyze the possible causes that produced the pathological manifestations in the pavement concrete. The study was based on the structural analysis of these elements. Therefore, this study was based on the method of finite elements and subsequent analysis of the results produced by the correlation between stress versus number of permissible axle bushings. The study was divided into three parts: (1) method of pavement’s structural analysis, (2) discussion of the results and (3) conclusion. As a result, it was found that many of the pathological manifestations may have stemmed from the thermal effects arising in the pavement concrete.Keywords: Pathology; Pavements; Concrete.

scholarly journals Research on the State-of-art, Connotation and Key Implementation Technology of Assembly Process Planning with Digital Twin

2019 ◽  
Vol 55 (17) ◽  
pp. 110
Author(s):  
GUO Feiyan ◽  
LIU Jianhua ◽  
ZOU Fang ◽  
ZHAI Yunong ◽  
WANG Zhongqi ◽  
...  
Keyword(s):  
Process Planning ◽  
The State ◽  
Assembly Process ◽  
Assembly Process Planning ◽  
Digital Twin ◽  
State Of Art

scholarly journals The use of tool materials for monitoring the state of cutting technological systems

2021 ◽  
Vol 25 (1) ◽  
pp. 17-30
Author(s):  
В. Ya. Mokritskiy ◽  
V. Yu. Shelkovnikov
Keyword(s):  
Tool Life ◽  
Stainless Steels ◽  
Tool Material ◽  
The State ◽  
Technological System ◽  
Dynamic State ◽  
Technological Systems ◽  
Software Environment ◽  
Life Period ◽  
Cutting Zone

 The aim was to develop a methodology for monitoring the dynamic state of the links “machine tool – device – cutting tool – detail” comprising a cutting technological system as applied to turning specialized stainless steels using replaceable standard hardmetal inserts. The research object was the hard-to-treat non-corrosive stainless steels 09Х17Н7Ю, 12Х18Н10Т and 13Х15Н5 АМ-3. Monitoring was carried out by simulating plate coatings in the Deform software environment. The diagnostic criterion was the tool life period up to the wear level of 0.5 mm along the rear edge. The effect of coatings on the tool life period was assessed according to the following parameters: temperature in the cutting zone, tension in the tool material and tool deformation. As a result, 10 optimal coatings having the greatest impact on the state of the cutting technological system under study were selected. These coatings can be used for diagnosing the state of cutting technological systems. The coatings were distinguished in terms of architecture (design, composition,structure and coating method). A technique for monitoring and managing the state of cutting technological systems according to the results of diagnostics was proposed. The deviation of the revealed state of the cutting technological system from the desired state was estimated by the life period of tools with different coatings for the same time of their operation. The state of the system under study was considered effective provided that the maximum tool life period due to the use of an optimal coating was achieved. A technique allowing assessment of the state of technological cutting systems by their simulation according to the parameters “temperature in the cutting zone”, “tension in the tool material” and “tool deformation” was proposed. This technique also permits monitoring of the state of cutting systems by the parameter "tool life period" and managing their state according to the results of diagnostics through the use of the most optimal plate coatings. The developed technique can be used to reveal the optimal parameters of the cutting mode of hard-to-treat specialized corrosion-resistant steels.  

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