scholarly journals Wear Resistance Enhancement of Cutting Tools in CNC Machine

2019 ◽  
Vol 9 (2) ◽  
pp. 1264-1270
Keyword(s):  
Mechanical Properties ◽  
Metal Cutting ◽  
Elevated Temperatures ◽  
Cutting Tools ◽  
Basic Function ◽  
Cnc Machine ◽  
Efficient Manner ◽  
Tool Coatings ◽  
Metal Cutting Tool ◽  
The Right

Cutting Tools form the basis of the machining industry. The Machining industry relies on various processes such as cutting, welding, bending, rolling, turning, profiling, drilling, milling, finishing, which require an effective set of cutting tools. These machining activities need the right cutting tools so that the day to day operations can be performed in an extremely efficient manner while increasing the productivity of the industry. The basic function of a metal cutting tool is to get rid of the extra material from the workpiece and help in producing products with a better surface finish. The material used for the manufacturing of the cutting tools has a significant role to play in deciding the effectiveness and the longevity of the tool. Coated cutting tools were used in the industry for a long time. In recent times more than three fourth of all tools are coated with TiALN and TiN. The mechanical properties of these tools tend to change drastically under elevated temperatures and thus cause the failure of such tools. In this paper, our objective is to use Carbon Nano Tube nanoparticles as coatings for cutting tools. We aim to compare the mechanical properties of these coated tools and do a comparative analysis of tools coated with CNT nanoparticles versus the conventional multi-layered tool coatings

Hard Nano-Crystalline Coatings for Cutting Tools

2007 ◽  
Vol 567-568 ◽  
pp. 185-188 ◽  
Author(s):  
Miroslav Piska
Keyword(s):  
High Speed ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Dry Cutting ◽  
Nano Crystalline ◽  
The Right ◽  
Machining Productivity ◽  
Hard Cutting ◽  
Cutting Tool Materials

Modern trends in metal cutting, high speed/feed machining, dry cutting and hard cutting set more demanding characteristics for cutting tool materials. The exposed parts of the cutting edges must be protected against the severe loading conditions and wear. The most significant coatings methods for cutting tools are PVD and CVD/MTCVD today. The choice of the right substrate or the right protective coating in the specific machining operation can have serious impact on machining productivity and economy. In many cases the deposition of the cutting tool with a hard coating increases considerably its cutting performance and tool life. The coating protects the tool against abrasion, adhesion, diffusion, formation of comb cracks and other wear phenomena.

Effect of mechanical properties measured at room and elevated temperatures on the wear resistance of cutting tools with TiAlN and AlCrN coatings

2006 ◽  
Vol 200 (20-21) ◽  
pp. 5738-5742 ◽  
Author(s):  
G.S. Fox-Rabinovich ◽  
B.D. Beake ◽  
J.L. Endrino ◽  
S.C. Veldhuis ◽  
R. Parkinson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Elevated Temperatures ◽  
Cutting Tools

Transient Thermal Stresses in the Quarter-Plane and their Relation to the Thermal-Cracking of Cutting Tools

1974 ◽  
Vol 16 (5) ◽  
pp. 322-330
Author(s):  
P. F. Thomason
Keyword(s):  
Metal Cutting ◽  
Thermal Stresses ◽  
Cutting Tool ◽  
Crack Nucleation ◽  
Cutting Tools ◽  
Thermal Cracking ◽  
Quarter Plane ◽  
Metal Cutting Tool ◽  
Transient Thermal ◽  
Cemented Carbide Tools

The transient thermal stresses in an insulated quarter-plane, subject to an instantaneous heat source on a segment of the surface, are determined with the aid of the Green's function for a two-dimensional infinite space. Numerical results for the transient thermal stresses at the surfaces of the quarter-plane are superimposed on previous isothermal results for cutting-load stresses in a π/2 wedge, to provide a model for a metal-cutting tool in the transient stages of a cutting process. The results are related to the problem of the thermal-cracking of cutting tools, and mechanisms of crack nucleation and propagation are proposed for both ceramic and cemented-carbide tools.

Methods of Forecasting Wear Resistance of Cutting Tools Based on the Properties of their Materials

2014 ◽  
Vol 682 ◽  
pp. 491-494 ◽  
Author(s):  
Vladislav Bibik ◽  
Elena Petrova
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Chemical Properties ◽  
Tool Material ◽  
Composition Structure ◽  
Metal Cutting Tool ◽  
Physical And Chemical ◽  
Thermo Physical Properties

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.

Application of CBN Cutting Tools in Hard Turning and Tool Wear

2013 ◽  
Vol 690-693 ◽  
pp. 2022-2025
Author(s):  
Hai Dong Zhao ◽  
Li Bao An ◽  
Pei Qing Yang ◽  
Ye Geng
Keyword(s):  
Tool Wear ◽  
Hard Turning ◽  
Manufacturing Industry ◽  
Metal Cutting ◽  
Elevated Temperatures ◽  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Tool Material ◽  
Specific Strength ◽  
Strength And Stiffness

Considerable research has been directed towards discovering new engineering materials for various applications. As a superhard material, Cubic Boron Nitride (CBN) has been developed and applied to engineering for several tens of years. Due to its high specific strength and stiffness as well as good creep, fatigue and wear resistance at elevated temperatures, CBN has been widely used as cutting tool material in manufacturing industry. In this paper, the preparation and characteristics of CBN are introduced. As hard turning has been more and more employed in recent years as an advanced metal cutting technique, the application of CBN cutting tools in hard turning is presented based on the literature, and in particular, the main wear mechanisms of CBN tools in hard turning are summarized, owing to the significant influence of tool wear on the tool life and product quality.

Improving Machinability in Conventional Turning of Ti-6Al-4V Using Work Piece Pre-Heating with Standard Cutting Tools

2015 ◽  
Vol 813-814 ◽  
pp. 347-351
Author(s):  
F. Abdullah Sultan ◽  
R. Panneer
Keyword(s):  
Mechanical Properties ◽  
Tool Wear ◽  
Robust Design ◽  
Elevated Temperatures ◽  
Cutting Tools ◽  
Work Piece ◽  
High Productivity ◽  
Conventional Machining ◽  
Very High ◽  
Rapid Tool

Machining hard to machine materials using conventional method of machining has proved to be very costly as these materials greatly affect the tool life because of poor machinability. One material that requires considerable study is Titanium which is a relatively lightweight material and provides excellent mechanical properties. The major problems in machining Titanium Alloys are the high cutting temperatures and rapid tool wear. Machining of Titanium using techniques like Laser Assisted Machining and Plasma Assisted Machining have proven to give high productivity rates, but the costs associated are very high. The main objective of this work is to develop a method for improving the machinability of Ti-6Al-4V using Work Piece Pre-Heating technique by using Conventional Machining with standard tools. Design of experiments was performed using Taguchi’s robust design. The machining operation was performed at elevated temperatures using oxy-acetylene flame. The tools used are Coated and Uncoated Carbide Tools. Based on the tool wear values obtained with different cutting conditions, it is concluded that this technique is feasible with the coated and uncoated carbide tools to machine titanium components commercially.

scholarly journals Improving Gear Milling Efficiency by Creating Prefabricated Cutters with Replaceable Cutting Carbide Plates

2020 ◽  
Vol 24 (1) ◽  
pp. 35-51
Author(s):  
E. V. Artamonov ◽  
V. V. Kireev ◽  
V. A. Zyryanov
Keyword(s):  
Metal Cutting ◽  
Cutting Tools ◽  
Machine Building ◽  
Initial Contour ◽  
Technical Solution ◽  
Processing Efficiency ◽  
Milling Cutter ◽  
Cutting Insert ◽  
Metal Cutting Tool ◽  
Building Enterprises

Today, when machining domestic-made worm milling cutter according to GOST 9324-80, a problem arises in their durability at the roughing stage. Russian tool companies engaged in the manufacture of metal cutting tools do not currently offer prefabricated worm tools with cutting elements made of hard alloy tools for machining large-modular gears.Purpose of research. Creation of prefabricated structures for machine-building enterprises with replaceable cutting carbide plates (RCHAP). Due to this, the productivity of equipment already available at the enterprise is increased several times, the economic efficiency of introducing high-quality metal-cutting tools makes it possible to purchase modern equipment and make the work of machine operators at machine-building enterprises more efficient and less time-consuming. In this paper, we propose a fundamentally new technical solution, which makes it possible to increase the efficiency of machining gears with a metal-cutting tool, with the arrangement of replaceable carbide cutting plates in the prefabricated initial contour of the manufacturing rail in worm milling cutters.Methods. The research method is the use of graphic simulation, which allows you to determine the size of the crosssectional area of the cut layer for the cutting elements of the worm tool.Results. Improving the processing efficiency will be achieved by implementing a group cutting scheme in a prefabricated worm milling cutter by using a larger number of main and side carbide cutting inserts on an Archimedean tool worm, which allow sequentially cutting the machining allowance and reducing the feed rate to the cutting insert, to ensure milling uniformity throughout the processing stage, and also reduce the magnitude of shock loads on cutting carbide elements of a precast tool.Conclusion. The use of replaceable carbide plates in a group cutting scheme increases the durability and reliability of a precast worm cutter.

Inventory of Experimental Works on Cutting Tools’ Life for the Wood Industry

2014 ◽  
pp. 320-342
Author(s):  
Pierre-Jean Méausoone ◽  
Alfredo Aguilera
Keyword(s):  
Tool Wear ◽  
Cutting Tools ◽  
Optimal Conditions ◽  
Limited Life ◽  
Tool Coatings ◽  
Experimental Works ◽  
Edge Temperature ◽  
The Right ◽  
Fixed Period

Woodworking is based on a trinomial machine/piece/tool. For maximum quality of the manufactured piece, it is important not to separate this trinomial, but the limited life of tools prevents that permanent contact. This phenomenon is due to the wear of the cutting parts of the tools. The prevention of wear is based on two methods. The first is to anticipate the end point of tool wear, changing these after a fixed period, no matter what. The other school is to recognize the tool wear at the event: the tools are changed once they are really worn out, finding faults on manufactured parts. A worn tool generates pieces with non-compliant quality or even unusable. A deeper understanding of wear and its consequences would change the tool at the right time. The tool wear for wood is due to several phenomena interacting with each other. The first dominating phenomenon is a corrosive attack that decreases the mechanical strength of the surface. The second is an abrasive attack whose work is facilitated by the reduced resistance of the surface. Repeated shocks can be in the degradation of the cutting edge, temperature acting as amplifier to wear. Understanding of the wear patterns can characterize the life of tools by wear measurement to find ways to extend this period with development of tool coatings, while maintaining optimal conditions for woodworking to get the best finish.

scholarly journals Influence of Thickness of Multilayer Composite Nano-structured Coatings on Tool Life of Metal-Cutting Tool

2019 ◽  
Vol 224 ◽  
pp. 05011
Author(s):  
Catherine Sotova ◽  
Nikolay Sitnikov ◽  
Jury Bublikov ◽  
Gaik Oganyan ◽  
Andre D.L. Batako
Keyword(s):  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Coated Tools ◽  
Tool Coating ◽  
Cutting Inserts ◽  
Metal Cutting Tool ◽  
Different Thickness ◽  
Cutting Modes ◽  
Strength Of Adhesion

The paper is focused on turning of structural steels C45. Cutting tools were represented by carbide cutting inserts without coatings, with reference coating TiAlN, as well as with multilayered composite nano-structured coatings Ti-TiN-(TiCrAl)N and Zr-ZrN-(ZrCrNbAl)N (of different thickness of 3-7 μm). The following studies of the properties of coated tools were carried out: measurement of microhardness and strength of adhesion bonds in the “tool-coating” system and investigation of elemental and phase compositions of coatings. The cutting tests were carried out at the following cutting modes: f = 0.2 mm/rev; аp = 1.0 mm; vc = 200, 250, 300, 350 and 400 m/min.

scholarly journals Processing of critical parts of marine vessels and structures by metal cutting tools

2021 ◽  
pp. 13-17
Author(s):  
Б.Я. Мокрицкий ◽  
В.М. Давыдов
Keyword(s):  
Service Life ◽  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Software Environment ◽  
Machined Surface ◽  
Metal Cutting Tool ◽  
Marine Vessels

Актуальность. Изложены результаты совершенствования токарной обработки заготовок ответственных деталей морских судов, особенно подводных, и сооружений, подвергаемых в процессе эксплуатации агрессивному воздействию морской воды, например, валопроводов судов. Такие детали, как правило, выполняются из специализированных труднообрабатываемых нержавеющих сталей. Специфические свойства таких сталей создают серьёзные сложности при их обработке лезвийным металлорежущим инструментом. Например, период стойкости типового токарного резца отечественных или зарубежных изготовителей не превышает 40 минут. Это не приемлемо для сегодняшнего уровня высокопроизводительной обработки. Целью работы является повышение эффективности токарной обработки таких сталей. Решение этой задачи достигнуто за счёт разработки новых покрытий для таких режущих пластин. Методы исследования. Для разработки использовано имитационное моделирование как метод исследования. Оно выполнено в программной среде Deform. Она адаптирована под решаемую задачу. Результаты. Разработан металлорежущий инструмент с покрытиями, обеспечивающий повышение периода стойкости в 2 и более раз. Вывод. Поставленная цель достигнута. Обеспечено повышение периода стойкости металлорежущего инструмента в 2 и более раз без снижения производительности обработки и с повышением качества поверхности обработанной заготовки детали. The relevance of the research is due to the fact, that a number of parts of marine vessels and structures must be made of corrosion-resistant steels. These are specialized stainless steels. They have a lot of chrome and nickel. It makes difficult to process blanks of details by metal-cutting tools. Its durability period is insufficient. The aim of the research is to increase the efficiency of turning such steels. Efficiency here means an increasing of the service life of a metal-cutting tool without decreasing of the processing performance and the quality of the machined surface of the detail. The software environment Deform was used as a method of the simulation research. Initial and output criterias have been developed for it. For this purpose, the software environment is adapted to the solving problem. As input parameters, the architecture of the coating is set, when applied to the hard-alloy material, an increase of the tool life is expected. The following results were obtained. Coatings for turning tools, providing the increase of the tool life to 2 or more times, were designed. The output. The setted goal has been achieved. The service life of the metal-cutting tool is increased to 2 or more times without decreasing of the processing performance and with an increase of the surface quality of the processed details.

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