A Study on Driven-Type Rotary Cutting for Finish Turning of Carburized Hardened Steel

Kato, Hideharu; Shikimura, Tatsuya; Morimoto, Yoshitaka; Shintani, Kazuhiro; Inoue, Toshio; Nakagaki, Katsuhiro

doi:10.4028/www.scientific.net/KEM.523-524.250

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HomeKey Engineering MaterialsEmerging Technology in Precision Engineering XIVA Study on Driven-Type Rotary Cutting for Finish...

A Study on Driven-Type Rotary Cutting for Finish Turning of Carburized Hardened Steel

Abstract:

Recently, cutting has replaced grinding in the finish processing of hardened steel. However, tool damage is a major problem in high-efficiency operations that use high-speed cutting and high feed rate conditions instead of the present cutting conditions. Therefore, the examination of a new cutting technique that can realize high-efficiency cutting is desired. In this study, the effects and efficiency of driven rotary cutting are investigated in the finish turning of carburized hardened steel. Based on the results, flaking occurs at the cutting edge at a short cutting length of 0.2 km using single-point turning. On the other hand, even if the cutting length amounts to 1.5 km, the tool wear width without flaking is small in the case of a driven rotary tool. Additionally, the tool wear is uniformly distributed along the circumference of the cutting edge. Furthermore, based on an examination of high-efficiency processing by increasing the feed rate, it is clarified that a feed rate of 0.3 mm/rev is the optimum condition from the viewpoint of wear resistance and surface roughness. Additionally, even if the cutting length amounts to 5.0 km for this condition, the flank wear width is as small as 0.04 mm, and the tool wear progresses gradually.

Info:

Periodical:

Key Engineering Materials (Volumes 523-524)

Main Theme:

Emerging Technology in Precision Engineering XIV

Edited by:

Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou

Pages:

250-255

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.523-524.250

Citation:

H. Kato et al., "A Study on Driven-Type Rotary Cutting for Finish Turning of Carburized Hardened Steel", Key Engineering Materials, Vols. 523-524, pp. 250-255, 2012

Online since:

November 2012

Authors:

Hideharu Kato, Tatsuya Shikimura, Yoshitaka Morimoto, Kazuhiro Shintani, Toshio Inoue, Katsuhiro Nakagaki

Keywords:

Carburized Hardened Steel, Coated Tool, Cutting Condition, Cutting Force, Driven Rotary Tool, Multitasking Machine Tool, Tool Damage

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Price:

$41.00

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References

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[2] K. Shintani, M. Ueki, Y. Fjimura, Optimum Cutting Tool Geometry When Interrupted Cutting Carburized Steel by CBN Tool, International Journal of Machine Tools & Manufacture, 29, 3 (1989)415-423.

DOI: https://doi.org/10.1016/0890-6955(89)90010-2

[3] T. Egawa, T. Ichikizaki, M. Kuroda, Y. Hiasa, H. Tsukamoto, Wear Mechanism of cBN Tool in Cutting of Hardened Steel, The Japan Society for Precision Engineering, 61, 6(1995) 809-813.

DOI: https://doi.org/10.2493/jjspe.61.809

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DOI: https://doi.org/10.2493/jjspe.66.886

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Paper TitlePages

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Authors: Yuan Liang Zhang, Zhi Min Zhou, Zhi Hui Xia

Abstract: Ultrasonic vibration is applied to diamond turning of special stainless steel to decrease diamond tool wear and improve the surface quality of the workpieces. It reviews the principle of diamond turning of special stainless steel by applying ultrasonic vibration combined with gas shield. Compared with the ordinary machining method, cutting temperature and cutting force are greatly reduced when machining by application of ultrasonic vibration, and the appetency between a diamond tool and Ferrous atom of a workpiece is also minimized as gas shield application. The Experiments of cutting special stainless steel workpieces show that the surface roughness Ra is less than 0.15μm and flank wear-width is less than 5μm when cutting distance is up to 2000m. It takes research on the effect of cutting parameters to surface roughness and tool wear. The experiment result shows that the amplitude is the most important factor which effects tool wear and surface roughness most.

Study of Cutting Forces on Machinability Properties of Gray Cast Iron Using New Ceramics Cutting Tools

Authors: José Vitor C. Souza, Maria do Carmo de Andrade Nono, Rodrigo de Matos Oliveira, M.V. Ribeiro, Olivério Moreira Macedo Silva

Abstract: During gray cast iron cutting, the great rate of mechanical energy from cutting forces is converted into heat. Considerable heat is generated, principally in three areas: the shear zone, rake face and at the clearance side of the cutting edge. Excessive heat will cause undesirable high temperature in the tool which leads to softening of the tool and its accelerated wear and breakage. Nowadays the advanced ceramics are widely used in cutting tools. In this paper a composition special of Si3N4 was sintering, characterized, cut and ground to make SNGN120408 and applyed in machining gray cast iron with hardness equal 205 HB in dry cutting conditions by using digital controlled computer lathe. The tool performance was analysed in function of cutting forces, flank wear, temperature and roughness. Therefore metal removing process is carried out for three different cutting speeds (300 m/min, 600 m/min, and 800 m/min), while a cutting depth of 1 mm and a feed rate of 0.33 mm/rev are kept constant. As a result of the experiments, the lowest main cutting force, which depends on cutting speed, is obtained as 264 N at 600 m/min while the highest main cutting force is recorded as 294 N at 300 m/min.

598

Cutting Performance of Al₂O₃/TiC/TiN Nanocomposite Tools

Authors: Han Lian Liu, Chuan Zhen Huang, Bin Zou

Abstract: A multi-scale and multi-phase nanocomposite ceramic cutting tool material Al2O3/TiC/TiN(LTN) with high comprehensive mechanical properties has been successfully fabricated by means of adding micro-scale TiC and nano-scale TiN particles. The cutting performance and wear mechanisms of this advanced ceramic cutting tool were researched by turning two kinds of hardened steel 40Cr and T10A respectively. Compared with the commercial ceramic tool LT55, LTN showed a superior wear resistance with certain machining parameters. The machining tests indicated that the new materials tool is suitable for continuously dry cutting of hardened steel with high hardness at high speed.

318

Control of Built-Up Edge Behavior by Chamfered Cutting Edge Preparation and Surface Modification

Authors: Hiroki Kiyota, Fumihiro Itoigawa, Takashi Nakamura

Abstract: A chamfered cutting edge, which is commonly shaped in order to strengthen an edge of a cutting tool consisting of brittle material, easily causes an enhanced adhesion and a burr formation due to high compressive stress anterior to the edge. These problems lead to a detachment of tool material and a notch wear at depth-of-cut line, which would result in unexpected tool fracture. On the other hand, the edge shape promotes formation of a built-up edge (BUE) as a dead metal and can maintain it stably. Actually, the formed BUE is plastically extruded along to the chamfered edge and can prevent formation of the notch wear. In this study, basic experiments to reveal effects of chamfered tool edge preparation, such as chamfer angle, chamfer width and rake angle, on the BUE behavior were conducted. Additionally, the results suggested that the plastic flow in the BUE extrusion can suppress the adhesion if the extrusion is arisen uniformly. Therefore, attempts to control the BUE flow by chamfer surface modification were carried out.

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