Vol. 99, Issue 12, December 2008, pp.53-65

Modal Analysis and Experimental Determination of Optimum Tool Shank Overhang of a Lathe Machine

Nabin SARDAR, Amiya BHAUMIK, Nirmal Kumar MANDAL

Department of Mechanical Engineering

National Institute of Technical Teachers’ Training & Research,

Block-FC, Sector-III, Saltlake City, Kolkata-700106

E-mail: nabin.sardar@rediffmail.com, amiya67@rediffmail.com, mandal_nirmal@yahoo.com

Received: 19 November 2008   /Accepted: 22 December 2008   /Published: 30 December 2008

Abstract: Vibration of Tool Shank of a cutting tool has large influence on tolerances and surface finish of products. Frequency and amplitude of vibrations depend on the overhang of the shank of the cutting tool. In turning operations, when the tool overhang is about 2 times of the tool height, the amplitude of the vibration is almost zero and dimensional tolerances and surface finish of the product becomes high. In this paper, the above statement is verified firstly by using a finite element analysis of the cutting tool with ANSYS software package and secondly, with experimental verification with a piezoelectric sensor.

Keywords: Modal testing, Tool shank, Piezoelectric sensor, Signal conditioner, Analyzer

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