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.

scholarly journals An interlocking side mill with retrofittable carbide blades for processing of coarse-pitch tooth wheels

2018 ◽  
Vol 224 ◽  
pp. 01051
Author(s):  
Evgeniy V. Artamonov ◽  
Vitaliy V. Kireev ◽  
Vitaliy A. Zyryanov
Keyword(s):  
Hard Alloy ◽  
Metal Cutting ◽  
Positive Impact ◽  
Cutting Tools ◽  
Machine Building ◽  
Building Industry ◽  
Technical Solution ◽  
Straight Line ◽  
Wear And Tear ◽  
Quality Tool

Nowadays Russian manufacturers of metal-cutting tools for machine-building industry do not offer structures of prefabricated cutting hobs with retrofittable carbide blades for processing of tooth wheels, though usage of retrofittable carbide blades allows to increase significantly working capacity and productivity of the processing. As of today creation of an assembly cutting tool for processing of tooth wheels with the retrofittable carbide blades is a big step forward for machine-building industry. A high quality tool allows warranting for a new equipment and making work of operators more productive. This paper offers a new technical solution providing increase of efficiency of processing by assembly tools with the retrofittable carbide blades made of a hard alloy. Due to usage of progressive cutting patterns division of a margin for straight-line segments and curved sections is performed. This division has a positive impact on cutting hard-alloy inserts and also reduces their wear and tear.

Increase of Firmness of the Metall-Cutting Tool on the Basis of Removal of Internal Tension in Replaceable Cutting Insert

2014 ◽  
Vol 682 ◽  
pp. 510-514 ◽  
Author(s):  
R.S. Chuykov ◽  
A.A. Mokhovikov ◽  
S.S. Chuykov
Keyword(s):  
Hard Alloy ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Cutting Process ◽  
Technical Solution ◽  
Special Design ◽  
Preliminary Heating ◽  
Cutting Insert ◽  
Metal Cutting Tool

Results of research of types of the destruction caused by existence of internal tension in a tool firm alloy at production of the replaceable many-sided plates (RMSP) which can be removed by preliminary heating of cutting plates prior to cutting process are given in work. The new technical solution on realization of a method of preliminary heating of SMP is developed for removal of internal tension in the tool firm alloys (TFA), and also the special design of the metal-cutting tool is developed for increase of operability of hard-alloy SMP with preliminary heating.

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.

RESEARCH OF WEIGHT AND DIMENSIONAL PARAMETERS OF METAL-CUTTING CARBIDE PLATES FOR JUSTIFICATION OF IMPROVEMENT OF THEIR QUALITY

2020 ◽  
pp. 20-29
Author(s):  
B. Ya. Mokritsky ◽  
D. A. Savin ◽  
Ya. V. Konyukhova ◽  
O. G. Shakirova ◽  
S. I. Sukhorukov
Keyword(s):  
Technological Process ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Machine Building ◽  
Operating Conditions ◽  
Dimensional Parameters ◽  
Building Enterprise ◽  
Metal Cutting Tool

The result of the technological process of mechanical blade processing of blanks of General machine-building parts is largely determined by the properties and parameters of the metal-cutting tool used. The paper considers the influence of deviations from the nominal value of such parameters as weight and dimensions of replaceable carbide cutting plates on this result. The purpose of the work is to draw conclusions about their suitability in the operating conditions of a typical machine-building enterprise based on the results of monitoring the parameters of the plates. The parameters of plates of different 15 series of carbide plates are investigated. The technique of separation of plates on conditional grades of quality is formed. The ratio of suitable and defective plates is shown, proposals for the fields of application of suitable plates depending on their grade are formulated.

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

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.

Analysis and Research of the Technology Based on Carbide Tool Passivation

2014 ◽  
Vol 541-542 ◽  
pp. 579-583
Author(s):  
Zhi Xing Mao ◽  
Chang Tao Cai ◽  
Jing Xing Qi
Keyword(s):  
Metal Cutting ◽  
Cutting Tool ◽  
New Technology ◽  
Cutting Tools ◽  
Cutting Performance ◽  
Manufacturing Cost ◽  
Carbide Tool ◽  
Processing Efficiency ◽  
High Loss ◽  
Blade Shape

There are many factors having effects on the cutting performance and useful time of cutting-tools, such as cutting-tools material, geometry parameters, structure and the optimization of cutting parameter, etc. But the condition of cutting-tools edge shouldnt be ignored. As is known to all, the micro gaps of cutting edge extend easily in the process of cutting, and accelerates the wear and damage of tools. As for the current situation of low passivation efficiency in edge, high loss of passivation and uncontrollability in blade shape, some improvements and new technology for applying to tools passivation are proposed based on the analysis and research about carbide tool passivation. Whats more, some exploration experiment will be done. The results show that those passivation technology can improve the processing efficiency of metal-cutting, cutting tool expectancy and reduce manufacturing cost.

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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