Results 1 to 10 of about 82,561 (281)

Hard turning with variable micro-geometry PcBN tools [PDF]

open access: yesCIRP Annals, 2008
This paper presents investigations on hard turning with variable edge design PcBN inserts. Turning of hardened AISI 4340 steel with uniform and variable edge design PcBN inserts is conducted, forces and tool wear are measured. 3D finite element modelling is utilized to predict chip formation, forces, temperatures and tool wear on uniform and variable ...
Özel, T., Karpat, Y., Srivastava, A.
openaire   +6 more sources

Analysis of the Parameter of the Electro-discharge Texturing [PDF]

open access: yesActa Montanistica Slovaca, 2007
This paper deals with analysis of the electro discharge texturing (EDT) parameter impact to micro-geometry of the cylinder surface. Micro-geometry of the cylinder surface results has significant influence to final quality of rolled metal plate used to ...
Ján Terpák   +2 more
doaj   +2 more sources

Optimization of micro tool geometry for ballpoint pen tip production using finite element simulation and orthogonal experiments [PDF]

open access: yesScientific Reports
Micro-drilling in ballpoint pen tip production faces persistent challenges of tool wear and premature breakage, which limit manufacturing efficiency and dimensional accuracy. In this study, an integrated framework combining finite element simulation (FEM)
Yaxuan Bi   +3 more
doaj   +2 more sources

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

open access: yesDrvna Industrija, 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
Bartosz Palubicki   +4 more
doaj   +4 more sources

Wettability, Tribology, Degradation, and Topography of Laser-Textured Surfaces of Biopolymers [PDF]

open access: yesMicromachines
Surface texturing involves creating micro-channels, micro-dimples, micro-grooving, and other surface modifications. To do this, laser and micromachining are employed on the substrate surface in addition to other methods.
Ciprian-Dumitru Ciofu   +11 more
doaj   +2 more sources

Mathematical Models of the Geometry of Micro Milling Cutters [PDF]

open access: yesEPJ Web of Conferences, 2021
Micromachining is an up-to-date technology widely used in different advanced areas like electronics, aerospace and medical industries. For manufacturing components with highest precision and lowest surface roughness, small-sized end mills with working ...
Isaev Alexander   +3 more
doaj   +1 more source

Step-By-Step Modeling and Demetallation Experimental Study on the Porous Structure in Zeolites

open access: yesMolecules, 2022
The organization of microporous space in zeolites is discussed. A new step-by-step model is proposed that explains the principles of organizing the hierarchy of microporous space at the stage of assembling zeolites from elements of minimal size: a ...
Pavel Kononov   +4 more
doaj   +1 more source

The Architectonics Features of Heterostructures for IR Range Detectors Based on Polycrystalline Layers of Lead Chalcogenides

open access: yesCrystals, 2021
A model is developed for the formation of porous intragranular architectonics of nanostructured polycrystalline layers of lead chalcogenides for photodetectors and IR emitters.
Yuliya Mikhailovna Spivak   +4 more
doaj   +1 more source

Angular Rolling of the Hollow Flanges of Pipe Joints

open access: yesMetals, 2021
The paper considers a three-stage technology for angular rolling of the pipe workpiece. This technology facilitates the expansion of the range of flange parts available by eliminating a number of drawbacks of the known methods of metal forming.
Pavel Kononov   +3 more
doaj   +1 more source

SnO2-Based Porous Nanomaterials: Sol-Gel Formation and Gas-Sensing Application

open access: yesGels, 2023
Porous nanocomposites using two (tin dioxide–silica dioxide) and three (tin dioxide–indium oxide-silica dioxide)-component systems for gas sensors were created with the sol–gel method.
Irina Kononova   +2 more
doaj   +1 more source

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