Influence of the microstructure of tool coatings based on Ti and Al on the blunting process during chipboard processing

2020 ◽  
Vol 112 ◽  
pp. 54-59
Author(s):  
Paweł Czarniak ◽  
Karol Szymanowski ◽  
Peter Panjan
Keyword(s):  
Multilayer Coating ◽  
Cutting Tools ◽  
Rf Magnetron Sputtering ◽  
Deposition Process ◽  
Cnc Milling ◽  
Tool Coatings ◽  
Long Time ◽  
Machine Industry ◽  
Altin Coating ◽  
Clearance Face

Influence of the microstructure of tool coatings based on Ti and Al on the blunting process during chipboard processing.This work concerns three different tool coatings containing Ti and Al. i.e. TiN, AlTiN, TiAlSiN applied to cutting tools used in the machining of wood materials. In the case of the AlTiN coating, a multilayer structure with alternately arranged AlTiN and TiN nano-layers was used. The above coatings were applied to standard replaceable knives used for CNC milling heads made of WC-Co cemented carbide. The deposition process was carried out using the RF Magnetron Sputtering method. During the measurement on a workshop microscope, the VBmax index measured on the clearance face was adopted as the wear criterion. The research proved a very good behaviour of the TiN/AlTiN multilayer coating, for which the longest average service life which was recorded exceeded the results obtained for the reference tool by about 30%. The addition of silicon, which was supposed to increase the abrasion resistance, only did not improve the durability of the blade, it actually worsened it by 6%. In addition, the coating, which has been widely used in the machine industry for a very long time, i.e. TiN, did not extend the tool life significantly (+ 7%).

scholarly journals Protective Woodcutting Tool Coatings

2016 ◽  
Vol 64 (3) ◽  
pp. 835-839 ◽  
Author(s):  
Svetlana D. Latushkina ◽  
Pavel V. Rudak ◽  
Dmitri V. Kuis ◽  
Oxana G. Rudak ◽  
Olga I. Posylkina ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Metal Removal ◽  
High Reliability ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Deposition Process ◽  
Vacuum Arc ◽  
Resource Saving ◽  
Tool Coatings ◽  
Vacuum Arc Deposition

The modern woodworking industry applies resource-saving, environmentally appropriate technologies, providing both the metal removal performance enhancement and functioning with the optimal economic factors. Progressive cutting parameters require the application of the high-reliability cutting tools, eliminating machine-tool equipment standstill and increased cost of the expensive tool materials. In this paper it is suggested to increase the wood-cutting tool efficiency by means of the vacuum-arc separated coating deposition process optimization. The droplets are one of the main problems while generating vacuum-arc coatings, and they have a bad influence on the quality and operational coatings characteristics. The application of the separated system, allowing minimize the droplets content, is one of the most promising ways to solve this problem. Vacuum-arc deposition technique was used in this work to generate multicomponent coatings. The coatings deposition was directly carried out on the modernized vacuum-arc plant, equipped by Y-shaped macroparticles separator.

scholarly journals Investigation of Multiparameter Laser Stripping of AlTiN and DLC C Coatings

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 951
Author(s):  
Tomáš Primus ◽  
Josef Hlavinka ◽  
Pavel Zeman ◽  
Jan Brajer ◽  
Martin Šorm ◽  
...  
Keyword(s):  
Surface Roughness ◽  
High Efficiency ◽  
Steel Substrate ◽  
Cutting Tools ◽  
High Hardness ◽  
Working Time ◽  
Nanosecond Laser ◽  
Altin Coating ◽  
Successful Removal ◽  
Frequency Laser

The lifetime and properties of cutting tools and forming moulds can be prolonged and enhanced by the deposition of hard, thin coatings. After a certain period of usage, the coating will deteriorate. Any remaining coating must be removed prior to successful recoating. Laser stripping is a fast and environmentally friendly coating removal method. In this paper, we present laser removal of two types of coatings deposited on a 1.2379 tool steel substrate, namely, an AlTiN coating with high hardness and a DLC C coating with a small coefficient of friction (COF). A powerful nanosecond laser was employed to remove the coating from the substrate with high efficiency, along with suitable residual surface roughness. Measurements were taken of surface roughness, removed depth, and working time on a stripped area of 1 cm2. The samples were evaluated under a microscope, with a 3D profilometer, and by EDS chemical analysis. Successful removal of the coating was confirmed by optical analysis, but detailed chemical characterisation showed that about 30% of the coating element may remain on the surface. Moreover, a working time of less than 7.5 s per cm2 was obtained in this study. In addition, it was shown that the application of a second low energy, high frequency laser beam pass leads to remelting of the peaks of the material and reduced surface roughness.

THE ATOMIC FINITE ELEMENT METHOD AS A BRIDGE BETWEEN MOLECULAR DYNAMICS AND CONTINUUM MECHANICS

2011 ◽  
Vol 03 (01n02) ◽  
pp. 39-47 ◽  
Author(s):  
R. NEUGEBAUER ◽  
R. WERTHEIM ◽  
U. SEMMLER
Keyword(s):  
Finite Element Method ◽  
Molecular Dynamics ◽  
Finite Element ◽  
High Performance ◽  
Cutting Tools ◽  
Deposition Process ◽  
Dislocation Behavior ◽  
Crystal Plasticity Fem ◽  
The Continuum ◽  
Element Method

On cutting tools for high performance cutting (HPC) processes or for hard-to-cut materials, there is an increased importance in so-called superlattice coatings with hundreds of layers each of which is only a few nanometers in thickness. Homogeneity or average material properties based on the properties of single layers are not valid in these dimensions any more. Consequently, continuum mechanical material models cannot be used for modeling the behavior of nanolayers. Therefore, the interaction potentials between the single atoms should be considered. A new, so-called atomic finite element method (AFEM) is presented. In the AFEM the interatomic bonds are modeled as nonlinear spring elements. The AFEM is the connection between the molecular dynamics (MD) method and the crystal plasticity FEM (CPFEM). The MD simulates the atomic deposition process. The CPFEM considers the behavior of anisotropic crystals using the continuum mechanical FEM. On one side, the atomic structure data simulated by MD defines the interface to AFEM. On the other side, the boundary conditions (displacements and tractions) of the AFEM model are interpolated from the CPFEM simulations. In AFEM, the lattice deformation, the crack and dislocation behavior can be simulated and calculated at the nanometer scale.

Characterization of Coatings by SEM Based Microdiffraction

2011 ◽  
Vol 702-703 ◽  
pp. 570-573
Author(s):  
Ravi C. Gundakaram ◽  
Sai Pramod Pemmasani
Keyword(s):  
Multilayer Coating ◽  
Deposition Process ◽  
Compositional Variation ◽  
Structure Property ◽  
Simple Method ◽  
Combined Use ◽  
Set Up ◽  
Microstructural Studies ◽  
Comprehensive Study

The behaviour of a coating is directly related to its microstructure as well as the crystal structure and composition of different phases that are formed in the deposition process. A comprehensive study of the microstructure and local phase assembly in coatings would help in arriving at structure-property correlations that can help understand the coating behaviour. SEM-based diffraction techniques provide a simple method for obtaining local crystallographic information without the need for complex synchrotron sources. In this study, we present a method for characterization of coatings using SEM-based microdiffraction which involves the combined use of the EDS and EBSD capabilities, citing a Ti-Al-Cr-N multilayer coating as an example. The different layers in the coating were observed and the electron beam focused in each region to first obtain Energy Dispersive Spectra and electron backscatter patterns (EBSPs). The elemental constituents were identified from EDS maps and used to shortlist the possible phases present. The diffraction pattern for each possible phase was then calculated and the EBSPs of the observed and calculated patterns were compared for the closest match. The identified phase was then used as an input to set up EBSD scans across the coating. A qualitative picture of the compositional variation in multilayer coatings was obtained that could help in arriving at the exact stoichiometry of the different layers. Hence, SEM-based microdiffraction allows identification of local crystallographic phases and composition, permitting detailed microstructural studies that would find special application in the study of coatings.

Effects of Oxygen Flow Rate on Nanostructured ZnO Thin Films

2013 ◽  
Vol 667 ◽  
pp. 333-337
Author(s):  
S. Ahmad ◽  
N.D. Md Sin ◽  
M.N. Berhan ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Thin Films ◽  
Flow Rate ◽  
Volume Ratio ◽  
Rf Magnetron Sputtering ◽  
Deposition Process ◽  
Oxygen Flow Rate ◽  
Oxygen Flow ◽  
Zno Thin Films ◽  
Average Thickness ◽  
X Ray

Zinc Oxide (ZnO) thin films were deposited on thermally oxidized SiO2 by varying the oxygen flow rate. The deposition process were done using radio frequency (RF) magnetron sputtering at various oxygen flow rate ranging from 0 to 40 sccm. The surface morphology and crystallinity were analyzed by field emission scanning electron microscopy (FESEM) and X-Ray Diffractometer (XRD) respectively. The average thickness and deposition rate decreases with an increase of oxygen content. The grain size was measured by FESEM and it was found that it is also decreasing with the increased of oxygen flow rate. The films grown with 10 sccm oxygen shows the highest (002) peak however it is expected that the sample deposited with 40 sccm oxygen exhibit the highest sensitivity toward NH3 gas due to the highest surface to volume ratio.

Formation Hybrid Method of Multilayer Biocoatings, Based on PVD Technology

2013 ◽  
Vol 872 ◽  
pp. 241-247
Author(s):  
Sergey Ivanovich Tverdokhlebov ◽  
Evgeniy Viktorovich Shesterikov ◽  
Alena Igorevna Malchikhina
Keyword(s):  
Calcium Phosphate ◽  
Hybrid Method ◽  
Multilayer Coating ◽  
Rf Magnetron Sputtering ◽  
Hybrid Coatings ◽  
Mechanical And Tribological Properties ◽  
Technical Requirements ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings ◽  
Physical And Chemical

Hybrid method of obtaining calcium-phosphate coatings is presented in this article. Physical and chemical, mechanical and tribological hybrid coatings research makes it possible to determine the coatings formation modes satisfying medical and technical requirements. This multilayer coating consists of an oxide underlayer formed by gas thermal oxidation and calcium phosphate layer formed by RF magnetron sputtering at a frequency of 13.56 MHz. Experiments were carried out in different modes. Calcium-phosphate coatings formed in mixture of argon and oxygen at 1:1 ratio pressure of 0.3 Pa have the best physical and chemical, mechanical and tribological properties.

Effect of Oxygen Flow Rate on the Memristive Behavior of Reactively Sputtered TiO2 Thin Films

2014 ◽  
Vol 1024 ◽  
pp. 64-67 ◽  
Author(s):  
Nur Syahirah Kamarozaman ◽  
Muhamad Uzair Shamsul ◽  
Sukreen Hana Herman ◽  
Wan Fazlida Hanim Abdullah
Keyword(s):  
Thin Films ◽  
Flow Rate ◽  
Rf Magnetron Sputtering ◽  
Deposition Process ◽  
Oxygen Flow Rate ◽  
Oxygen Flow ◽  
Switching Behavior ◽  
Memristive Behavior ◽  
Effect Of Oxygen

The paper presents the memristive behavior of sputtered titania thin films on ITO substrate. Titania thin films were deposited by RF magnetron sputtering method while varying the oxygen flow rate of (O2/ (O2 + Ar) x100 = 10, 20 and 30 %) during deposition process. The effect of oxygen flow rate to the structural properties was studied including the physical thickness, and also the effect towards switching behavior. It was found that sample deposited at 20 % oxygen flow rate gave better memristive behavior compared to other samples, with larger ROFF/RON ratio of 9. The characterization of memristive behavior includes the effect of electroforming process and successive of I-V measurements are discussed.

scholarly journals IMPROVE PRODUCTIVITY THROUGH DIGITAL MANUFACTURING

2021 ◽  
Vol 24 (2) ◽  
pp. 35-37
Author(s):  
Adrian But ◽  
◽  
Radu Canarache ◽  
Lucian Gal ◽  
◽  
...  
Keyword(s):  
Machine Tools ◽  
Cutting Tools ◽  
Cnc Machine Tools ◽  
Digital Manufacturing ◽  
Cnc Machine ◽  
High Productivity ◽  
Long Time ◽  
Additional Process ◽  
Cnc Simulation ◽  
Production Company

In the future the digitalization and "Industry 4.0” will be in every step of the product lifecycle from design to the manufacture, service, and maintenance. Through digitalization, the companies will be able to operate and program the complex CNC machine tools that will be ready to respond more flexibly to the market demands and at the same time to boost their productivity. Work preparation and production can be breaking down further into additional process steps, ranging from tendering to quality assurance. The demand for digitalization solution can be illustrated thru the following targets and questions what every production company must define and establish: 1. How long time will be the part on the machine to be manufacturi; 2. Is that CNC machine tools (what is able and have the technical characteristics) available; 3. Are necessary new cutting tools for this new job; 4.The CNC operator is familiar with the CNC control equipment; 5. Does the workpiece tolerance correspond with the customer specifications. Is not so easy to link up all this requests and to find the best solutions in time and to have high productivity. Digital manufacturing will give us the preliminary units costs and delivery deadline that must be determined to be able to tender for a job correctly. Today, the amount of time a workpiece will require for machining can be calculated quickly reliably and very important, without trial runs, using CNC simulation solutions. This recommendations from our paper can be an answer at the production companies and the advantage of this implementations is that can be made step by step. The solution of this implementation should be in concordance with the company’s requirements and resources.

scholarly journals PERANCANGAN MESIN POTONG AKRILIK YANG ERGONOMIS DAN EKONOMIS MENGGUNAKAN METODE ERGONOMIC FUNCTION DEPLOYMENT (EFD)

2020 ◽  
Vol 7 (1) ◽  
pp. 96-103
Author(s):  
Huda Anshori
Keyword(s):  
Goal Setting ◽  
Quality Function Deployment ◽  
Design Method ◽  
Cutting Tools ◽  
Cutting Process ◽  
Goods And Services ◽  
Cutting Machine ◽  
Long Time ◽  
Circular Saws ◽  
Qfd Method

Advertising services which include the process of creating, producing and distributing advertisements, one example of which is billboards used to help entrepreneurs in promoting goods and services sold in Pekanbaru. In the process of working on advertising media, especially in the cutting process using cutting tools in the form of circular saws and scroll saws. In the cutting process there are several obstacles that are often experienced by operators, cutting edges are difficult to find, the unit is expensive, cutting edges often break, dynamo power can drop dramatically, work takes a long time and operators feel tired, that's why it is necessary to design an acrylic cutting machine which can be used to meet the operators needs at work. The design method uses the Ergonomic Function Deployment (EFD) method. This method is a development of the Quality Function Deployment (QFD) method. The stages in this research are introduction, identification, formulation, goal setting, method application followed by analysis and discussion, and finally conclusions, suggestions, and improvements. Based on the research, the variable results obtained from a closed questionnaire and processed using SPSS 16 software.

scholarly journals A nonlocal algorithm for analyzing the data of monochromatic optical control in the process of multilayer coating deposition

2019 ◽  
pp. 471-480
Author(s):  
И.В. Кочиков ◽  
Ю.С. Лагутин ◽  
А.А. Лагутина ◽  
Д.В. Лукьяненко ◽  
А.В. Тихонравов ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Physical Model ◽  
Optical Thickness ◽  
Multilayer Coating ◽  
Measurement Data ◽  
Deposition Process ◽  
Optical Control ◽  
Recording Device ◽  
Coating Deposition ◽  
Quarter Wave

Предложен новый алгоритм определения значений экстремумов измеряемой в процессе напыления многослойного покрытия зависимости значения коэффициента отражения от оптической толщины напыляемого слоя. Алгоритм использует физическую модель процесса напыления, что позволяет использовать все данные измерений, накопленные регистрирующим прибором во время напыления слоя, в отличие от классических подходов, которые хорошо описывают зависимость коэффициента отражения только вблизи ее экстремума. Эффективность предложенного подхода продемонстрирована на примере моделирования процесса напыления 20слойного четвертьволнового зеркала. A new algorithm for determining the extrema in the dependence of the reflection coefficient on the optical thickness of the deposited layer is proposed. This reflection coefficient is measured during the deposition process of a multilayer coating. The proposed algorithm uses a physical model of the deposition process, which makes it possible to use all the measurement data accumulated by a recording device during the deposition of the layer in contrast to the classical approaches that adequately describe the dependence of the reflection coefficient only near its extremum. The efficiency of the proposed approach is shown by an example of modeling the deposition process for a 20-layer quarter-wave mirror.

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