Study on A Damping System for the Toolholder in a Turning Process
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 4
Abstract
In the turning process, vibration of the toolholder significantly affects the surface roughness. This study introduces an application of a damping system for reducing toolholder vibration and improving the surface quality of the part being machined in the turning process. The damping system is designed with an object mass and two springs, and it assembles the toolholder using two damping designs. After assembly, the toolholder is used for machining the workpiece with a cutting length of 60 mm, cutting depth of 0.5 mm, velocity of 0.05 mm/rev, and spindle speed of 1000 rev/min. For Design 1, the result shows that when the object mass B (11.83 g)is used and the spring constant is increased from 400 to 2800 N/m, the vibration angle dR decreases from 0.22331º to 0.04632º; however, when the spring constant continually rises to 3733 N/m, the vibration angle increases to 0.10273º. When using Design 2, when the spring constant increases from 400 to 500 N/m, dR reduces to 0.122º. Moreover, Design1 shows better stability than Design 2 with different object masses and spring constants. Object mass B is selected for evaluating the effect of the damping system on the surface roughness. The results show that the surface roughness varies from 0.925 to 1.169 μm and from 1.22225 to 0.84225 μm with Design 1 and 2, respectively.
Authors and Affiliations
Thanh Trung Do, Pham Son Minh, Le Hoang Lam
Keywords
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