• VVSH Prasad
• Dr. V. Kamala

Milling is one of the important machining operations on prismatic components. The multipoint cutter used on universal milling machine is not fully engaged with work piece during metal cutting operation which results in intermittent cutting producing harmonic force (tangential) on the machine tool producing forced vibrations. This vibration produce chatter marks on the work piece resulting in poor quality of surface finish and also affects the cutting tool life. Generally face milling, gang milling /slab milling operations both in vertical and horizontal spindle orientations cause forced vibrations on the machine tool. In this paper an attempt is made to study the amplitude of vibration theoretically as well as experimentally using low cost multi reed instrument and verifying with vibrometre. Multi reed instrument is designed and fabricated for different natural frequencies to sense resonant conditions during milling operations. The instrument is designed in such a way to meet kinematic lay out of the machine ie from 160 to 1600 rpm. The combined stiffness matrix (CSM) of the machine is evaluated as springs in series connectivity of major components using Finite element method (FEM) considering hysteresis damping. The work resulted in avoiding resonant amplitude of vibrations, for modifying the cutting parameters in critical machining operations thus improving the quality of work output

Forced vibrations. Universal milling machine, multi reed instrument, combined stiffness matrix

"Design and Development of Multi Reed Instrument for Vibration Analysis ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.980-989, August-2018, Available :http://www.jetir.org/papers/JETIR1808896.pdf

"Design and Development of Multi Reed Instrument for Vibration Analysis ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp980-989, August-2018, Available at : http://www.jetir.org/papers/JETIR1808896.pdf