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http://dx.doi.org/10.14775/ksmpe.2016.15.2.051

A Study on Design Improvement by Vibration Analysis of Hardened Glass & Sapphire Machining Equipment for Smart IT Parts Industry  

Cho, Jun-Hyun (Mechanical Design of Kumoh University of Science and Technology)
Park, Sang-Hyun (Mechanical Design of Kumoh University of Science and Technology)
An, Beom-Sang (Mechanical Design of Kumoh University of Science and Technology)
Lee, Jong-Chan (Mechanical Design of Kumoh University of Science and Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.15, no.2, 2016 , pp. 51-56 More about this Journal
Abstract
High brittleness is a characteristic of glass, and in many cases it is broken during the process of machining due to processing problems, such as scratches, chipping, and notches. Machining defects occur due to the vibration of the equipment. Therefore, design techniques are needed that can control the vibration generated in the equipment to increase the strength of tempered glass. The natural frequency of the machine tool via vibration analysis (computer simulation) must be accurately understood to improve the design to ensure the stability of the machine. To accurately understand the natural frequency, 3D modeling, which is the same as actual apparatus, was used and a constraint condition was also applied that was the same as that of the actual apparatus. The maximum speeds of ultrasonic and high frequency, which are 15,000 rpm and 60,000 rpm, respectively, are considerably faster than those of typical machine tools. Therefore, an improved design is needed so that the natural frequency is formed at a lower region and the natural frequency does not increase through general design reinforcement. By restructuring the top frame of the glass processing, the natural frequency was not formed in the operating speed area with the improved design. The lower-order natural frequency is dominant for the effects that the natural frequency has on the vibration. Therefore, the design improvement in which the lower-order natural frequency is not formed in the operating speed area is an optimum design improvement. It is possible to effectively control the vibrations by avoiding resonance with simple design improvements.
Keywords
Natural Frequency; Glass Machining Equipment; Design Improvement; Vibration Control;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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