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.

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.

scholarly journals SYSTEM FOR CONTROLLING MASS BALANCE OF GASES AND REAGENTS DURING FORMATION OF ION-PLASMA COATINGS

2020 ◽  
pp. 67-75
Author(s):  
K. V. Diadiun
Keyword(s):  
Mass Balance ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Tool Material ◽  
Automated System ◽  
Effective Control ◽  
Ion Plasma ◽  
Physical Deposition ◽  
Plasma Coatings ◽  
Metal Cutting Tool

Providing an increase in the working capacity of a metal-cutting tool, it is possible to significantly increase the productivity of mechanized labor, thereby reducing the cost of purchasing a new tool and saving on other accompanying technological components. During the operation of the cutting tool, the main load is transferred to its working part, this, as a rule, leads to partial wear or complete destruction of the planes and cutting edges. There are a number of technologies for processing working surfaces, which provides them with additional strengthening, the most effective of which is the method of applying special coatings to the surface of the cutting tool. Taking into account the specifics of the processes of formation of coatings, they can be divided into three main groups [1]. The first group includes methods in which the formation of coatings is carried out mainly due to diffusion reactions between saturating elements and structures of the instrumental material. The second group includes methods of forming coatings by a complex mechanism. The third group includes methods of forming coatings due to chemical and plasma-chemical reactions of particle flux simultaneously in volumes of space immediately adjacent to the saturable surfaces of the instrumental base. One such technology is the CIB (condensation and ion bombardment) method, which is a physical deposition of coatings. The most characteristic feature of coatings produced by this method is the absence of a transition zone between the coating and the tool material. This makes it possible to obtain a complex of properties on the working surfaces of the tool without deteriorating its original properties. The article is devoted to the issues of increasing the efficiency of ion-plasma technologies through the development and implementation of an automated system for analyzing and controlling the mass balance of reagent gases under conditions of several gases supply. Thus, the improvement of the technology of coating the working surfaces of the cutting tool, namely, the effective control of the process of applying ion-plasma coatings with the introduction of an automated system for analyzing and controlling the mass balance of reagent gases under conditions of supplying several gases is an urgent task.

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.

Comparative Evaluation of Efficiency of Metal-Cutting Tool by Method of Pendulum Scribing

2015 ◽  
Vol 798 ◽  
pp. 452-456 ◽  
Author(s):  
Boris Y. Mokritskii ◽  
Dmitriy A. Pustovalov ◽  
Alexey Anatolevich Vereschaka
Keyword(s):  
Material Properties ◽  
Comparative Evaluation ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Low Cost ◽  
Tool Material ◽  
Maximum Width ◽  
Tool Materials ◽  
Metal Cutting Tool ◽  
The Relationship

Method of pendulum scribing was investigated in terms of the possibilities of using this method as a simple-to-use way with a relatively low cost for rapid evaluation of tool material properties. It has been established that by using this method the conditions of loading of the tool material are closest to the real conditions in which the tool operates. Was revealed the relationship between the maximum width and length of the track pendulum scribing and physico-mechanical properties of tool materials. Application of the proposed methodology allows passing to predicting the performance properties of the tool, such as tool life under the specified conditions.

Effect of residual elements on the machinability of leaded free machining steels

1980 ◽  
Vol 295 (1413) ◽  
pp. 87-88 ◽  
Keyword(s):  
Wear Rate ◽  
Tool Wear ◽  
Tool Life ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Tool Material ◽  
High Speed Steel ◽  
Low Carbon ◽  
Wear Rates

The machinability of a material can be defined in terms of the wear rate of the cutting tool used to machine the material. The lower the tool wear rate or the greater the tool life the better the machinability. The wear processes of cutting tools are complicated, but recent work has shown that cutting tool wear rates during machining can be directly related to tool material wear rates when rubbing in a modified crossed cylinder wear experiment (Mills & Akhtar 1975). The wear of cutting tools can be simulated by simple experiments. Here I present results on the effect of total residual levels in leaded low carbon free machining steels on the tool life of M2 high speed steel. The results will be discussed in terms of a simple wear model.

Selection of strengthening coatings based on simulation results

2020 ◽  
pp. 147-150
Author(s):  
B.Ya. Mokritsky ◽  
E.S. Sitamov
Keyword(s):  
Metal Cutting ◽  
Cutting Tool ◽  
Tool Material ◽  
Operating Conditions ◽  
Multilayer Coatings ◽  
Software Environment ◽  
Simulation Results ◽  
Cutting Processes ◽  
Metal Cutting Tool ◽  
Selection Of

By modeling cutting processes in the ANSYS and DEFORM software environments, can significantly reduce costs when choosing rational tool material for metal-cutting tool. For multilayer coatings on carbide substrate this is difficult for number of reasons. This possibility is shown and examples for using of the DEFORM software environment for choosing of rational or competing coatings, including for “designing” of the coating for the specified operating conditions of metal-cutting tool are presented.

scholarly journals Influence of thickness of multilayer composite nano-structured coating Ti-TiN-(Ti,Al,Cr)N on tool life of metal-cutting tool

Procedia CIRP ◽  
2018 ◽  
Vol 77 ◽  
pp. 545-548 ◽  
Author(s):  
Alexey Vereschaka ◽  
Sergey Grigoriev ◽  
Nikolay Sitnikov ◽  
Gaik Oganyan ◽  
Catherine Sotova
Keyword(s):  
Tool Life ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Multilayer Composite ◽  
Metal Cutting Tool

scholarly journals Predicting Cutting Force and Primary Shear Behavior in Micro-Textured Tools Assisted Machining of AISI 630: Numerical Modeling and Taguchi Analysis

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 91
Author(s):  
Shafahat Ali ◽  
Said Abdallah ◽  
Salman Pervaiz
Keyword(s):  
Tool Life ◽  
High Performance ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Cutting Process ◽  
Cutting Fluids ◽  
Machining Performance

The cutting tool heats up during the cutting of high-performance super alloys and it negatively affects the life of the cutting tool. Improved tool life can enhance both the machinability and sustainability of the cutting process. To improve the tool life preferably cutting fluids are utilized. However, the majority of cutting fluids are non-biodegradable in nature and pose harmful threats to the environment. It has been established in the metal cutting literature that introducing microgrooves at the cutting tool rake face can significantly reduce the coefficient of friction (COF). Reduction in the COF promotes anti-adhesive behavior that improves the tool life. The current study numerically investigates the orthogonal cutting process of AISI 630 Stainless Steel using different micro grooved cutting tools. Results of the numerical simulations point to the positive influence of micro grooves on tool life. The results of the main effects found that the cutting temperature was decreased by approximately 10% and 7% with rectangular and triangular micro grooved tools, respectively. Over machining performance indicated that rectangular micro groove tools provided comparatively better performance.

METHODS FOR FORMING MULTI-LAYER WEAR-RESISTANT COATINGS ON THE CUTTING SURFACE OF A METAL WORKING TOOL

2020 ◽  
pp. 27-32
Author(s):  
Yu. M. Zubarev ◽  
M. A. Afanasenkov
Keyword(s):  
Wear Resistance ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Effective Means ◽  
Cutting Tools ◽  
Tool Material ◽  
Machine Building ◽  
Stage Of Development ◽  
Cutting Surface ◽  
Wide Range

Improving the performance of metal-cutting tools, i.e. their wear resistance in a wide range of technological cutting modes, when processing various hard-to-process steels and alloys is an urgent task of modern machine-building production. The efficiency of blade processing at the present stage of development of mechanical engineering depends to a large extent on the performance of the cutting tool, which is primarily determined by the combination of physical and mechanical properties of the tool material-hardness, strength wear resistance, etc. however, obtaining the optimal combination of these properties in the volume of the cutting tool material presents significant difficulties. When solving the complex task of improving the quality and reliability of the cutting tool, it is of great importance to widely use various types of coatings on its cutting surface, which allow saving scarce materials and prolonging its service life, significantlyincreasing the performance of the tool. Improving the performance of tools is one of the main ways to improve the resource reliability of their operation. The main and most important performance indicators of tools are largely determined by the quality of their surface layers. Therefore, the formation of a high-quality surface layer on the surface of the cutting part of the tool and increasing wear resistance is the most effective means of improving its performance. This article discusses the main methods for improving the wear resistance of carbide cutting tools currently used, their evaluation and efficiency of use. The method of ionvacuum modification is proposed as the main method for improving the efficiency of the cutting tool.

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