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Boring bars with a large length-to-diameter (L/D) ratio in the machining process can cause excessive vibration or chatter, which reduces product quality. Dynamic vibration absorber (DVA) is a vibration reduction system that can reduce the chatter effect. In this study, DVA has the shape of a cone placed inside a boring bar, which consists of a mass of absorber made of brass covered with rubber. The rubber is varied, namely natural rubber and neoprene rubber. The simulation is carried out with various cutting parameters, including spindle speed, feed rate, and depth of cut. Based on the simulations, the DVA cone's shape allows it to reduce vibrations in all directions and produce the same reduction values on each axis. Customized boring bar L/D 9 with DVA natural rubber and cutting parameter 2 is the variation with the highest vibration response reduction value, namely 88.50% in the x-axis direction, 83.89% in the y-axis, and 88.52% in the z-axis. Customized boring bar L/D 7 is a geometry variation with the best operation because it can reduce vibration in most variations of cutting parameters compared to other variations of boring bars, namely 23 out of 27 cutting parameters.

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The Effect of Adding Cone Rubber-Mass Dynamic Vibration Absorber to Boring Bar on Reduction of Vibration Response in Machinery Process (Lathe Machine)

  • 会议论文

  • 发表日期：

    2025年

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  • Wiwiek Hendrowati,
  • Najya Rafa Meidina

摘要

Boring bars with a large length-to-diameter (L/D) ratio in the machining process can cause excessive vibration or chatter, which reduces product quality. Dynamic vibration absorber (DVA) is a vibration reduction system that can reduce the chatter effect. In this study, DVA has the shape of a cone placed inside a boring bar, which consists of a mass of absorber made of brass covered with rubber. The rubber is varied, namely natural rubber and neoprene rubber. The simulation is carried out with various cutting parameters, including spindle speed, feed rate, and depth of cut. Based on the simulations, the DVA cone's shape allows it to reduce vibrations in all directions and produce the same reduction values on each axis. Customized boring bar L/D 9 with DVA natural rubber and cutting parameter 2 is the variation with the highest vibration response reduction value, namely 88.50% in the x-axis direction, 83.89% in the y-axis, and 88.52% in the z-axis. Customized boring bar L/D 7 is a geometry variation with the best operation because it can reduce vibration in most variations of cutting parameters compared to other variations of boring bars, namely 23 out of 27 cutting parameters.