Wyniki wyszukiwania dla: CUTTING EDGE - MOST Wiedzy

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Wyniki wyszukiwania dla: CUTTING EDGE

Wyniki wyszukiwania dla: CUTTING EDGE

  • A Method and Device for 3D Recognition of Cutting Edge Micro Geometry

    Publikacja

    - Drvna Industrija - Rok 2014

    A very useful method was successfully applied in the investigation of tools for machining wood and wood based composites. It allows scanning of the cutting edge micro geometry in three dimensions and reproducing it in a virtual space as a 3D surface. The application of the method opens new possibilities of studying tool wear by scanning, including the calculation of volume loss and other analysis of tool wedge geometry along and...

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  • A Method and Device for 3D Recognition of Cutting Edge Micro Geometry

    Publikacja
    • B. Palubicki
    • M. Szulc
    • J. Sandak
    • G. Sinn
    • K. Orlowski

    - Drvna Industrija - Rok 2014

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  • Cut layer of a circular saw with radiaj run-out of cutting edges

    Publikacja

    - Drvna Industrija - Rok 2005

    W pracy przedstawiono analizę wpływu bicia promieniowego ostrzy piły tarczowej na zmianę nominalnego i całkowitego pola przekroju warstwy skrawanej.

  • AN ALTERNATIVE WAY OF DETERMINING MECHANICAL PROPERTIES OF WOOD BY MEASURING CUTTING FORCES

    Publikacja

    - Wiadomości Konserwatorskie - Pismo Stowarzyszenia Konserwatorów Zabytków - Rok 2015

    The cutting force is an energetic effect of splitting material, and might be therefore considered from a point of view of modern fracture mechanics. The dedicated mathematical model developed for description of the wood cutting has been developed here on the base of fracture theory, and includes work of separation (fracture toughness) in addition to the material plasticity and friction. The effect of the cutting edge dullness is...

  • SAWING PROCESS AS A NEW ALTERNATIVE WAY OF DETERMINING SOME WOOD PROPERTIES

    Publikacja

    - Rok 2015

    Cutting forces (power) could be considered from a point of view of modern fracture mechanics. The developed cutting model, derived from fracture mechanics, includes work of separation (fracture toughness) in addition to plasticity and friction, and also dullness of the cutting edge described by the cutting edge radius. Moreover, forecasting of the shear plane angle for the cutting models, broaden possibilities of energetic effects...

  • Tool Wear Monitoring Using Improved Dragonfly Optimization Algorithm and Deep Belief Network

    Publikacja
    • L. Gertrude David
    • R. Kumar Patra
    • P. Falkowski-Gilski
    • P. Bidare Divakarachari
    • L. J. Antony Marcilin

    - Applied Sciences-Basel - Rok 2022

    In recent decades, tool wear monitoring has played a crucial role in the improvement of industrial production quality and efficiency. In the machining process, it is important to predict both tool cost and life, and to reduce the equipment downtime. The conventional methods need enormous quantities of human resources and expert skills to achieve precise tool wear information. To automatically identify the tool wear types, deep...

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  • Degradation of a nano-cutting tool: an MD simulation

    Publikacja

    W pracy przedstawiono wyniki symulacji wielokrotnego oddziaływania realistycznie ukształtowanego ostrza tnącego z modelowym, nieskończenie twardym ziarnem, przy zastosowaniu metody dynamiki molekularnej. Ostrze składało się z kilkuset tysięcy atomów metalu fcc, traktowanego za pomocą potencjału Suttona-Chena, przesuwane było ze stałą prędkością 20 m/s. Obserwowane deformacje plastyczne pojawiające się na skutek kontaktu ostrza...

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  • Sawing Processes as a Way of Determining Fracture Toughness and Shear Yield Stresses of Wood

    Publikacja

    - BIORESOURCES - Rok 2015

    A new computational model, based on fracture mechanics, was used to determine cutting forces. Unlike traditional computing methods, which depend on many coefficients reflecting the machining of solid wood, the new model uses two main parameters: fracture toughness and shear yield stresses. The aim of this study was to apply this new method to determine these parameters for the tooth cutting edge principal positions and longitudinal...

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  • OVERALL SET OF BANDSAW TEETH VERSUS METHODS OF MEASUREMENTS

    This article deals with the impact of the manual methods of measurement on the overall set measurement results. It describes the results of the measurement of bandsaw teeth kerf with the use of a micrometer and a digital calliper. It is commonly known that the cutting process causes the wear of cutting tools. The wear of the cutting edge depends on the cutting conditions as well as on the mechanical properties of the processed...

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  • Fracture Toughness and Shear Yield Strength Determination for Two Selected Species of Central European Provenance

    Publikacja
    • L. Hlaskova
    • K. Orłowski
    • Z. Kopecky
    • M. Svitak
    • T. Ochrymiuk

    - BIORESOURCES - Rok 2018

    When offcut of wood is formed by shearing, Atkins’s analyses of sawing processes can be applied. Using this modern approach, it is possible to determine the fracture toughness and shear yield strength of wood. This model is only applicable for the axial-perpendicular cutting direction because both of these parameters are suitable for the given direction of cutting edge movement and cannot be considered material constants. Alternatively,...

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  • Distribution of roughness and waviness components of turned surface profiles

    The paper presents a spectral formulation of surface profile irregularity in a wideband frequency range for roughness, waviness and shape components along the measured length. A unique distribution of roughness and waviness components is proposed, according to the nature of their origination in the course of machining with tools of defined cutting edge, as distinct from standard filtration in measurements of surface irregularities....

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  • Representing and Managing Experiential Knowledge with Decisional DNA and its Drimos® Extension

    Publikacja

    - Rok 2022

    The Semantic Web concept is proposing a future concept of the WorldWideWeb (WWW) where both humans and man-made systems are able to interconnect and exchange knowledge. One of the challenges of Semantic Web is smart and trusted accommodation of knowledge in artificial systems so it can be unified, enhanced, reused, shared, communicated and distributed with added aptitude. Our research represents an important component of addressing...

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  • An assessment of teeth quality of the mini gang saw blade

    Publikacja

    - Annals of WULS, Forestry and Wood Technology - Rok 2016

    In this work, the assessment of the effect of the operating time (90 min.) of the mini gang saw blades during sawing Scotch pine (Pinus sylvestris L.) samples upon changes of the saw blade teeth sharpness (bluntness), which was defined as an effective radius of the nose ρ , has been described. The research activities have been carried out on the Nikon Ti-S optical microscope equipped with the Nikon DS-30W camera allowing high-speed...

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  • Vibration Surveillance System with Variable Stiffness Holder for Milling Flexible Details

    Efficient milling of the flexible details (i.e. rotor blades, thin-walled elements) using slender ball-end tools is a difficult task due to possibility of vibration occurrence. Because of the existence of certain conditions (small depths of cutting, regeneration phenomena), cutting process may lose stability and self-excited chatter vibration may appear. Frequency of the chatter vibration is close to dominant natural frequency...

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  • Bio-inspired Decisional DNA in Machinas and other Man-made Systems: The Way Forward

    Publikacja

    - Rok 2014

    Artificial bio-inspired intelligent techniques and systems supporting smart, knowledge-based solutions of real world problems which are currently researched very extensively by research teams around the world, have enormous potential to enhance automation of decision making and problem solving for a number of diverse areas including design, manufacturing, Information Technology (IT), social communities of practice, and economics...

  • Software development methodologies and practices in start-ups

    Publikacja

    - IET Software - Rok 2019

    Software start-ups are aiming to develop cutting-edge software products under highly uncertain conditions, overcoming fast-growing markets under multiple influences. This study aims to identify and analyse the existing scientific literature regarding software development methodologies and practices in software start-ups published between January 2006 and December 2017 using the systematic mapping study. The results identified 37...

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  • A CNN based coronavirus disease prediction system for chest X-rays

    Coronavirus disease (COVID-19) proliferated globally in early 2020, causing existential dread in the whole world. Radiography is crucial in the clinical staging and diagnosis of COVID-19 and offers high potential to improve healthcare plans for tackling the pandemic. However high variations in infection characteristics and low contrast between normal and infected regions pose great challenges in preparing radiological reports....

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  • Catalytic Mechanism of Non-Target DNA Cleavage in CRISPR-Cas9 Revealed by Ab Initio Molecular Dynamics

    Publikacja

    - ACS Catalysis - Rok 2020

    CRISPR-Cas9 is a cutting-edge genome editing technology, which uses the endonuclease Cas9 to introduce mutations at desired sites of the genome. This revolutionary tool is promising to treat a myriad of human genetic diseases. Nevertheless, the molecular basis of DNA cleavage, which is a fundamental step for genome editing, has not been established. Here, quantum–classical molecular dynamics (MD) and free energy methods are used...

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  • The ONETEP linear-scaling density functional theory program

    Publikacja
    • J. C. A. Prentice
    • J. Aarons
    • J. C. Womack
    • A. E. A. Allen
    • L. Andrinopoulos
    • L. Anton
    • R. A. Bell
    • A. Bhandari
    • G. A. Bramley
    • R. J. Charlton... i 26 innych

    - JOURNAL OF CHEMICAL PHYSICS - Rok 2020

    We present an overview of the ONETEP program for linear-scaling density functional theory (DFT) calculations with large basis set (planewave) accuracy on parallel computers. The DFT energy is computed from the density matrix, which is constructed from spatially localized orbitals we call Non-orthogonal Generalized Wannier Functions (NGWFs), expressed in terms of periodic sinc (psinc) functions. During the calculation, both the...

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  • Intellectual brain drain and economic growth in developing countries: A theoretical solution of strategic compensation

    Publikacja

    - Rok 2021

    Brain drain is a real problem for the developing countries like Pakistan. It not only impacts theworkforce, but its effect eventually translates to economic growth as well. The most severe form of braindrain is intellectual as top tier skilled employees’ move out of the country. This study explores the issue ofintellectual brain drain in Pakistan moreover analyzes its severity to the economic growth. Finally,...

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  • Smart Knowledge Engineering for Cognitive Systems: A Brief Overview

    Publikacja

    - CYBERNETICS AND SYSTEMS - Rok 2022

    Cognition in computer sciences refers to the ability of a system to learn at scale, reason with purpose, and naturally interact with humans and other smart systems, such as humans do. To enhance intelligence, as well as to introduce cognitive functions into machines, recent studies have brought humans into the loop, turning the system into a human–AI hybrid. To effectively integrate and manipulate hybrid knowledge, suitable technologies...

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  • Designing digital displays and interactive media in today’s cities by night. Do we know enough about attracting attention to do so?

    With the huge transformation in the development of digital screen technology and its consistently decreasing cost, digital billboards are progressively replacing traditional static, two-dimensional poster advertisements in our cities1. Previously, due to the substantial expenditure involved, they were only available to major international brands with vast promotional resources to build their brand fame. Today, however, they are...

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  • A study of a compact high-efficiency zero-emission power plant with oxy-fuel combustion

    Publikacja

    - Rok 2019

    This paper discusses the application of global trends in gas cycles technology using oxy-fuel combustion. This is followed by a demonstration of a design solution for a new cycle with two enhanced energy-converting devices, namely a wet combustion chamber and a spray-ejector condenser. The proposed gas and steam cycle unit is contained within a single turbine, whose benefits combine those offered by gas turbines (high inlet temperatures)...

  • Estimation of fracture toughness and shear yield stress of orthotropic materials in cutting with rotating tools

    Publikacja

    - ENGINEERING FRACTURE MECHANICS - Rok 2017

    The cutting force is an energetic effect of splitting material, and might be considered from a point of view of modern fracture mechanics. Forecasting of the shear plane angle in cutting broaden possibilities for modelling of the cutting process even for thin uncut chips. Such mathematical model has been developed here for description of the orthotropic materials’ cutting on the base of fracture theory, and includes work of separation...

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