scholarly journals ANALYSIS AND CLASSIFICATION OF MANUFACTURING CENTERS FOCUSED ON MECHANICAL PART OF OPTICAL DEVICES

2020 ◽  
Vol 6 (1) ◽  
pp. 91-98
Author(s):  
Nikolay E. Gavrichenko ◽  
Pavel V. Petrov
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Optical Devices ◽  
Comprehensive Analysis ◽  
Structural Elements ◽  
Metal Parts ◽  
Complex Metal ◽  
Mechanical Part ◽  
Formalized Description

The article deals with the concept of flexible and dynamic classification of metal-cutting machines of the "turning processing center" (TPC) type for the production of complex metal parts of optical devices by cutting. It is intended to create specialized databases with a formalized description of the structural elements of the TPC and automatically perform multiple classifications, relying on various factors. The comprehensive analysis of machine-tool companies is made; the generalized structure of structural elements and parameters of modern TPC is defined.

scholarly journals TECHNOLOGICAL FEATURES OF MANUFACTURING COMPLEX PARTS OF THE MECHANICAL PART OF OPTICAL DEVICES AT MACHINING CENTERS

2021 ◽  
Vol 6 ◽  
pp. 46-51
Author(s):  
Nikolay E. Gavrichenko
Keyword(s):  
Metal Cutting ◽  
Optical Devices ◽  
Mechanical Part ◽  
Machining Center ◽  
Theoretical Significance ◽  
Cutting Equipment ◽  
Assembly Technology ◽  
Modern Manufacturing ◽  
Metal Products ◽  
Complex Parts

The article defines the concept of "technological features". Examples of technological features of modern manufacturing by cutting complex parts of the mechanical part of optical devices are considered and analyzed. The examples contain fragments of manufacturing parts only on CNC machines of the "machining center" type. This type of metal-cutting equipment is accepted as the main one in the conditions of automation of processing by cutting metal products. The necessity of systematization of the features of manufacturing products in optical and assembly technology is stated. Attention is drawn to the practical and theoretical significance of this work.

Dynamics of the processes in metal machining

1998 ◽  
Vol 2 ◽  
pp. 115-122
Author(s):  
Donatas Švitra ◽  
Jolanta Janutėnienė
Keyword(s):  
High Frequency ◽  
Machine Tools ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Low Frequency ◽  
Metal Cutting Machine ◽  
Cutting Machine ◽  
Metal Machining

In the practice of processing of metals by cutting it is necessary to overcome the vibration of the cutting tool, the processed detail and units of the machine tool. These vibrations in many cases are an obstacle to increase the productivity and quality of treatment of details on metal-cutting machine tools. Vibration at cutting of metals is a very diverse phenomenon due to both it’s nature and the form of oscillatory motion. The most general classification of vibrations at cutting is a division them into forced vibration and autovibrations. The most difficult to remove and poorly investigated are the autovibrations, i.e. vibrations arising at the absence of external periodic forces. The autovibrations, stipulated by the process of cutting on metalcutting machine are of two types: the low-frequency autovibrations and high-frequency autovibrations. When the low-frequency autovibration there appear, the cutting process ought to be terminated and the cause of the vibrations eliminated. Otherwise, there is a danger of a break of both machine and tool. In the case of high-frequency vibration the machine operates apparently quiently, but the processed surface feature small-sized roughness. The frequency of autovibrations can reach 5000 Hz and more.

scholarly journals The Underlying Order Induced by Orthogonality and the Quantum Speed Limit

2021 ◽  
Vol 3 (3) ◽  
pp. 376-388
Author(s):  
Francisco J. Sevilla ◽  
Andrea Valdés-Hernández ◽  
Alan J. Barrios
Keyword(s):  
Energy Spectrum ◽  
Energy Distribution ◽  
Finite Time ◽  
Complete Characterization ◽  
Comprehensive Analysis ◽  
Orthogonality Condition ◽  
Speed Limit ◽  
Physical Quantities

We perform a comprehensive analysis of the set of parameters {ri} that provide the energy distribution of pure qutrits that evolve towards a distinguishable state at a finite time τ, when evolving under an arbitrary and time-independent Hamiltonian. The orthogonality condition is exactly solved, revealing a non-trivial interrelation between τ and the energy spectrum and allowing the classification of {ri} into families organized in a 2-simplex, δ2. Furthermore, the states determined by {ri} are likewise analyzed according to their quantum-speed limit. Namely, we construct a map that distinguishes those ris in δ2 correspondent to states whose orthogonality time is limited by the Mandelstam–Tamm bound from those restricted by the Margolus–Levitin one. Our results offer a complete characterization of the physical quantities that become relevant in both the preparation and study of the dynamics of three-level states evolving towards orthogonality.

Metal Cutting Machine Tool Design—A Review

1997 ◽  
Vol 119 (4B) ◽  
pp. 713-716 ◽  
Author(s):  
S. B. Rao
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Tool Design ◽  
Metal Cutting Machine ◽  
Machine Tool Design ◽  
Cutting Machine

This paper reviews the key developments in the area of metal cutting machine tool design over the last three decades, from a very practical perspective. While defining the drivers of machine tool design as higher productivity and higher accuracy, this paper examines the advances in design from the needs of these two drivers.

Model Research on Special Metal Cutting NC Machine Tool

2007 ◽  
Vol 10-12 ◽  
pp. 806-811
Author(s):  
Tong Zhao ◽  
P.Q. Ye ◽  
H. Zhang ◽  
X.K. Wang
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Relation Module ◽  
Nc Machine Tool ◽  
Model Research ◽  
Unit Model ◽  
Proposed Model ◽  
Control Research ◽  
Function Unit ◽  
Nc Machine

In this paper the model of special metal cutting NC machine Tool is presented, which consists of a base module, an overall control module, particular functional modules as well as a relation module. Each module involved in aforementioned model will be composed by software, hardware and mechanical parts, so as to combine the convergence of the ideas of modularization and mechanical-electrical integration into current understanding of special NC machine tool through the proposed model. Specially, the relation module is introduced to deal with the linking among all the other modules. The presented model aims to broaden the perspective of machine designers intending to increase the efficiency in machine design. By giving the so-called function unit model a novel modeling approach is delivered to carry out control research of special metal cutting NC machine, which is followed by the formalization description method presented as a possible abstraction methodology towards the efficient description and identification of special metal cutting NC machine tool.

scholarly journals THE UNIVERSAL STRUCTURE OF A DICTIONARY ARTICLE AS A STEP TOWARDS FORMALIZING THE LEXICOGRAPHICAL DESCRIPTION OF ARCHEOLOGICAL TERMINOLOGY

2020 ◽  
Vol 6 (3) ◽  
pp. 22-37
Author(s):  
Vera D. TABANAKOVA ◽  
Julia G. Kokorina
Keyword(s):  
Shape Function ◽  
Construction Material ◽  
Structural Elements ◽  
Archaeological Ceramics ◽  
Dictionary Entry ◽  
Systematic Development ◽  
Universal Structure ◽  
Formalized Description ◽  
Unified Description ◽  
Constructive Parameter

This article studies the formalized lexicographic description of the archaeological terminology and aims to develop its basis — the universal dictionary entry structure. The authors prove the need for the unified description of an archaeological term in dictionaries and terminological databases. The comparative analysis of the dictionary entry structures of contemporary archaeological dictionaries and term databases has shown that the unified principles for the formalized description of an archaeological object have not yet been developed. Thus, the archaeological dictionaries, as well as the term databases, do not have the unified structure of the dictionary entry. This paper describes the systematic development of the universal structure of the dictionary entry for the archaeological term. The source of the term material was the most complete contemporary terminological dictionary — “The Dictionary of Archaeological Ceramics” by Yu. G. Kokorina (2017). As a result of the logical-conceptual and definitional analysis of the archaeological term descriptions, the authors have proposed 15 linguistic and conceptual parameters: etymology, synonyms, pragmatic parameter, shape, function, constructive parameter, obligatory structural elements, metric parameter, degree of the metric parameter manifestation, proportions, quantitative parameter, cultural-geographical parameter, and construction material. The universal character of these parameters is supposed to ensure the development of the formalized dictionary entry structure of the archaeological term. The proposed all inclusive dictionary entry structure of the archaeological term can become the foundation for the formalized lexicographic description of archaeological terminology both in dictionaries and in automated databases.

Research on Kinematic Analysis and Post Processing Arithmetic for NC Machine Tool for Bonnet Tool Polishing

2007 ◽  
Vol 364-366 ◽  
pp. 707-712
Author(s):  
Ying Xue Yao ◽  
Shun Zhou Yu ◽  
Da Gang Xie
Keyword(s):  
Machine Tool ◽  
Metal Cutting ◽  
Transformation Method ◽  
Programming System ◽  
Automatic Programming ◽  
Post Processing ◽  
Nc Machine Tool ◽  
Nc Programming ◽  
Nc Machine ◽  
Optical Polishing

Bonnet tool polishing, combined traditional optical polishing technique with modern NC technology, is an novel optical polishing technique. As the motion control and material removal process is different from metal cutting NC machine tool, the NC programming for bonnet tool polishing NC machine tools cannot be carried out with commercial CAM software. This paper analyses the kinematics of feed mechanism and precession mechanism using coordinate transformation method and sets up the feed and precession kinematics equations. The arithmetic of post processing applied to NC automatic programming system is proposed according to kinematics equations and detail bonnet tool polishing technique.

scholarly journals The Religious Connotations of the Sovereign in Destitution in the Malay Hikayat

2014 ◽  
Vol 27 (2) ◽  
pp. 229-241
Author(s):  
Noriah Taslim ◽  
Keyword(s):  
Comprehensive Analysis ◽  
Structural Elements ◽  
Generic Structure ◽  
Religious Influence ◽  
Interpretative Model

The essay is an attempt to highlight the significance and the extent of religious influence on classical Malay literature. It plans to do this through the analysis of the structural elements of the plot at both at the surface and underlying level. To narrow down the analysis, only one genre of Malay literature, the so-called hikayat romance will be taken as corpus of investigation. To allow room for a more comprehensive analysis within this restricted corpus, two types of hikayat romance will be taken to task; these are the fantasy/court romance and the hagiographical romance. Both of these works are suitable for this study as they exhibit a remarkable level of religious influence in their textual elements. The analysis, however, will focus especially on the “exile motif” which is the controlling and generative element in the plot. Keywords: hikayat romance, generic structure, exile motif, Hindu interpretative model, sufistic interpretative model

Application of processing fiber-plastic composite washing

2021 ◽  
Vol 2021 (23) ◽  
pp. 214-224
Author(s):  
Artur Onyshchenko ◽  
◽  
Mykola Garkusha ◽  
Оlena Deli ◽  
◽  
...  
Keyword(s):  
Composite Materials ◽  
Operating Conditions ◽  
Structural Elements ◽  
Washing Machine ◽  
Normative Documents ◽  
Plastic Composite ◽  
Fiber Plastic ◽  
Fiberglass Composite ◽  
Composite Bridge

Introduction. Innovative, new materials are increasingly used in transport construction, among which composite materials are becoming widespread.Small bridges and elements of large bridges, such as roadway slabs, pavements, railings, composite reinforcement, reinforcement elements, are made of composite materials.Recently, the use of polymer composite materials for the manufacture of lightly loaded structural elements of transport structures, such as lighting poles, drainage trays, railings.Much attention should be paid to the fiberglass composite railing, which has a number of advantages over traditional metal fencing. Unfortunately, at present there are no clearly defined in Ukraine regulations on fiberglass composite fencing, so this topic is relevant and necessary for the transport industry.Problem Statement. From the literature analysis it is established that the railings of highways and sidewalks are in difficult operating conditions, are constantly exposed to aggressive environments - water, chemicals, salts.Goal. Increasing the durability of the railing by using new materials.Results. The analysis of production of a fiberglass profile is carried out. On the basis of the conducted researches the general requirements to a protection of fiberglass composite washing machine are established. On the basis of the current normative documents the classification of a protection on a place of installation, type of filling of a skeleton, a method of fastening of risers is developed. The paper presents the main parameters and dimensions of the fence. Material requirements are set. Methods of control of a protection with establishment of a technique of test of a protection on resistance to action of horizontal and vertical loadings are developed. Recommendations on installation and installation of a protection of fiberglass composite washing machine are offered.Conclusions. The research results were used in the development of technical conditions for the protection of fiberglass composite washing machine.Keywords: road, composite, bridge, fencing, profile, fiberglass, artificial construction

RESEARCH OF THE ISSUES OF IMPROVEMENT OF PROTECTION SYSTEMS AGAINST DDOS-ATTACKS BASED ON THE COMPREHENSIVE ANALYSIS OF MODERN INTERACTION MECHANISMS

2021 ◽  
Vol 53 (1) ◽  
pp. 63-74
Author(s):  
DMITRIY A. BACHMANOV ◽  
◽  
ANDREY R. OCHEREDKO ◽  
MICHAEL M. PUTYATO ◽  
ALEXANDER S. MAKARYAN ◽  
...  
Keyword(s):  
Denial Of Service ◽  
Comprehensive Analysis ◽  
Cyber Attacks ◽  
Ddos Attacks ◽  
Network Resources ◽  
Combined Use ◽  
Service Type ◽  
Protection Systems ◽  
Comparison Criteria

The article presents the results of an analysis of the growth in the development of botnet networks and new cyber threats when they are used by cybercriminals. A review and comparison of the models for the implementation of botnet networks is carried out, as a result of which there are two main types. The main types of attacks carried out using the infrastructure of distributed computer networks are identified and classified, formed into 7 main groups, taking into account the relevance, prevalence and amount of damage. Based on the results of the analysis, it was determined that the most widespread and relevant type of attack is “Denial of Service”. The article presents a classification of services that provide services to ensure the protection of network resources from distributed attacks by the "Denial of Service" type, by the type of deployment, the level of security and the types of services provided. The comparison criteria are given taking into account their infrastructure, availability of technical support and a test period, available types of protection, capabilities, additional options, notification and reporting, as well as licensing. Practically implemented and shown a way to integrate the DDoS-Guard Protection service with an additional module at the application level, which made it possible to expand the methods of protection against DDoS attacks. Various modifications of the combined use of the module and the modified system make it possible to increase the expected level of detection and prevention of cyber - attacks.

Sign in / Sign up

Export Citation Format

Share Document