Effect of conical micro-grooved texture on tool–chip friction property and cutting performance of WC-TiC/Co cemented carbide tools

Experimental study and theoretical calculation on the tool lives of free-cutting steels with different additions were carried out in terms of the friction characteristics, chip deformation, and normal stress distribution. The average friction coefficient, shear angle, and maximum normal stress were then calculated, and the influence of them on tool life was analyzed and discussed carefully. The free-cutting steel with Bi addition (MB) presented the best tool life of about 9200 and 5200 s at the speed of 150 and 200 m/min, respectively, which was mainly due to the combined effect of the lower average friction coefficient, maximum normal stress, and higher shear angle. When the cutting speed increased to 300 m/min, the tool life decreased rapidly, which was mainly caused by the serious tool wear behavior dominated by the high cutting temperature. Differing from the calculated results of shear angles based on Lee and Shaffer’s assumption, the measured shear angles decreased with the cutting speed ranging from 150 to 250 m/min, resulting from the thermal softening of workpiece material during machining. Moreover, the present findings indicated that the cutting process became unstable when the maximum normal stress on the tool nose was larger than 2 GPa, where catastrophic failures occurred, resulting in accelerated fracture of the tool. The research findings not only give more insight into the effect of friction characteristics, chip deformation, and normal stress distribution on the tool lives, but also have significance for the machining of free-cutting steels.

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“…The normal stress distribution function σ ( x ) on the rake face can be expressed by the equation. 35,37…”

Section: Resultsmentioning

confidence: 99%

Study on the tool life analysis for free-cutting steels

Zhang

Yang

Tang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Continuous textures such as sinusoidal texture, 96 diamond array texture, 97 etc. Pang et al 98,99 designed two new groove textures, one is a new symmetrical conical groove texture, and the other is a conical microgroove texture. Compared with the ordinary groove texture, the two continuous groove textures effectively improve the cutting performance of the textured tool.…”

Section: Effect Of Texture Geometry On Tribological Propertiesmentioning

confidence: 99%

Research progress of surface texturing to improve the tribological properties: A review

Liu,

Yang,

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the process of machine and mechanical operation, it is inevitable to face problems such as friction and wear. At present, there are many solutions to solve the problems. As a very effective method, surface texturing has been applied in many projects. In recent years, surface texturing has made great achievements in the study of friction pair surface, which is of great significance to improve the tribological properties of friction pair surface. In this paper, the author reviews the main research results of surface texturing in controlling friction in recent years and points out the research purpose and development status of surface texture. The preparation of texturing is summarized and analyzed from two aspects: shape and size control accuracy and surface quality. The research on the anti-friction mechanism of texture is reviewed, and the three states of dry friction, fluid lubrication, and boundary lubrication are analyzed, respectively. The optimization of morphology and parameters was discussed, and the optimal parameter range was obtained. Finally, the above aspects of the full text are summarized, and the problems faced by all aspects are put forward. Combined with the actual situation of the current research, the future development prospect of surface texture technology is prospected.

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“…Friction behaviors during the cutting process are affected by a variety of factors, including the material matching for the workpiece and cutting tool, the cooling medium and lubrication mode, the optimization of cutting parameters, the modification of the tool contact surface through micro/nano texture surface technology and tool coating technology [22][23][24][25]. These factors, directly and indirectly, affect the friction coefficient by changing the cutting friction behaviors and the study of a comprehensive relationship is urgently necessary.…”

Section: Introductionmentioning

confidence: 99%

Friction behaviors in the metal cutting process: state of the art and future perspectives

Liang

Wang

et al. 2022

Int. J. Extrem. Manuf.

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Material removal in the cutting process is regarded as a friction system with multiple input and output variables. The complexity of cutting friction system is caused by the extreme conditions existing on the tool-chip and tool-workpiece interfaces. The key issue is extremely important to use knowledge of cutting friction behaviors to guide researchers and industrial manufacturing engineers in designing reasonable cutting processes to reduce tool wear and improve surface quality. This review focuses on the state of the art of research on friction behaviors in cutting processes as well as future perspectives. First, the cutting friction phenomena under extreme conditions, such as high temperature, large strain/strain rates, sticking-sliding contact states, and diverse cutting conditions are analyzed. Second, the theoretical models of cutting friction behaviors and the application of simulation technology are discussed. Third, the factors that affect friction behaviors are analyzed including material matching, cutting parameters, lubrication/cooling conditions, micro/nano surface textures and tool coatings. Then, the consequences of the cutting friction phenomena including tool wear patterns, tool life, chip formation, and the machined surface are analyzed. Finally, the research limitations and future work for cutting friction behaviors are discussed. This review contributes to the understanding of cutting friction behaviors and the development of high-quality cutting technology.

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Effect of conical micro-grooved texture on tool–chip friction property and cutting performance of WC-TiC/Co cemented carbide tools

Cited by 16 publications

References 41 publications

Study on the tool life analysis for free-cutting steels

Study on the tool life analysis for free-cutting steels

Research progress of surface texturing to improve the tribological properties: A review

Friction behaviors in the metal cutting process: state of the art and future perspectives

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