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Development of Orthogonal Impact Cutting Testing Machine

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Abstract:

FEM cutting simulation predicts that the plastic shock waves are generated that develop the high levels of hydrostatic stress in the shear zone when cutting speed exceeds the plastic wave speeds of the workpiece material. The orthogonal impact cutting testing machine was developed to confirm this phenomenon experimentally. In the testing machine, two guide rails are set up in parallel. The cutting tool and the workpiece are installed on the blocks that slide on the rail. Each block connected with the piston in the air tube by the pushrod is launched by the expansion of compressed air, and is accelerated rapidly. When the two blocks passes each other, cutting is done. This paper describes the details of the developed impact cutting testing machine and experimental results of cutting a pure lead at cutting speed up to 65m/s.

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Advances in Abrasive Technology VIII View Preview

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Periodical:

Key Engineering Materials (Volumes 291-292)

Pages:

507-512

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.291-292.507

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Online since:

August 2005

Authors:

J. Shinozuka, Toshiyuki Obikawa

Keywords:

Chip Formation, Cutting Force, Hydrostatic Stress, Plastic Wave, Shear Angle, Shock Wave, Ultra High Speed Cutting

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] J. Shinozuka and T. Obikawa: Abrasive Technology Current Development and Applications I (World Scientific, Singapore 1999), pp.378-385.

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[2] J. Shinozuka and T. Obikawa: Transaction of the Japan Society of Mechanical Engineers (C), Vol. 69, No. 680, pp.1123-1130 (in Japanese).

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[3] M.A. Meyers: Dynamic Behavior of Materials (John Wiley & Sons, Inc., USA 1994).

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10 20 30 40 50 60 70.

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[5] [10] [15] [20] [25] [30] Cutting speed Vc m/s Shear angle φ degree.

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10 20 30 40 50 60 70.

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200 400 600 800 1000 Cutting speed Vc m/s Specific cutting force fs N/mm2 Figure 8 Change in the shear angle and specific cutting force with cutting speed.

DOI: 10.1115/imece2001/med-23313

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