Analysis of the Reduction of Vibration and Chatter Effect in Boring Process Due to the Addition of Spring Radial Vibration Damper (SRVD) on the Workpiece

Iswanda, Mumtaza Rizky (2021) Analysis of the Reduction of Vibration and Chatter Effect in Boring Process Due to the Addition of Spring Radial Vibration Damper (SRVD) on the Workpiece. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Modern machining process has been rapidly evolving into much more sophisticated form. Moreover, the aid of computer guidance provides machining precision to be way easier to achieve. However, even with such sophistication in hand, the effect of chatter remains to be a significant problem to this day. The excessive vibration from chatter effect will reduce the effectiveness of machining process as well as the durability of the machine. To this day, engineers keep referring to the traditional chatter stability lobe to address the problem that limiting themselves in creativity to achieve high efficiency. A combination of particular spindle speed and specific cutting depth are needed to best avoid the chatter generation. There are various ways to reduce the effect of chatter in machining process, the usage of Dynamic Vibration Absorber (DVA) is one of them.
The machining process that being focused on this research is boring process. The research aims to observe the reduction of vibration along the boring process achieved by the addition of one type of DVA called Spring Radial Vibration Damper (SRVD) onto the workpiece. The workpiece is in the form of cylindrical rod with the ratio of overhang-length to diameter at 6:1. The parameters of the experiment are the spindle rotational speed that varies at 320 rpm, 450 rpm, and 720 rpm; the depth of cut (DoC) that varies at 0.25 mm, 0.2 mm, and 0.15mm; the feed rate of the boring process that varies at 0.1 and 0.26 mm/rev.
The results of the experiment are comparisons between the main system with the SRVD and without the SRVD in graphical representation of the dynamic response, percentage of reduction of the dynamic response’s Root Mean Square (RMS), and surface finish of each parameters. Parameter 1 (720 rpm, 0.25 DoC, 0.1 mm/rev) has the best percentage of RMS reduction at 68.89% and 80.77% for vertical and horizontal axis, respectively. The addition of SRVD reduced the dynamic response of main system and create stable condition for parameter with DoC of 0.2 and 0.25 mm. However, the addition of SRVD to worsen the dynamic response of main system at parameter with DoC of 1.5 mm. It can be concluded that SRVD is beneficial only to the cutting process within the unstable area of chatter stability lobe and it will worsen the cutting process if the parameters still lie within the stable area of chatter stability lobe.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	boring, chatter, radial vibration damper, root mean square
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ1185 Metal-cutting--Problems, exercises, etc. T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Mumtaza Rizky Iswanda
Date Deposited:	09 Mar 2021 13:19
Last Modified:	09 Mar 2021 13:19
URI:	http://repository.its.ac.id/id/eprint/83928

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