کاهش ارتعاشات خودتحریک در فرآیند میکرو-فرزکاری با استفاده از جاذبهای ارتعاشی

نوع مقاله: پژوهشی

نویسندگان

دانشگاه شهید باهنر کرمان

چکیده

در این مقاله‏‌ به مسئله فرونشاندن ارتعاشات خود تحریک در فرآیند میکرو-فرزکاری به منظور دستیابی به دقت بیشتر، کیفیت سطح بهتر و نرخ برداشت ماده بالاتر پرداخته شده است. فرآیند میکرو-فرزکاری به صورت یک سیستم 2 درجه آزادی مدل شده و اثرات خروج از مرکز ابزار برش نیز در نظر گرفته شده است. به منظور افزایش پایداری سیستم در عمق برش بیشتر و در نتیجه نرخ برداشت ماده بالاتر، جاذبهای ارتعاشی طراحی شده‌اند و مقادیر پارامترهای آنها بوسیله یک الگوریتم توسعه یافته، بهینه شده‌ است. تاثیر جاذب ارتعاشی بر پاسخ زمانی سیستم و ناحیه پایداری فرآیند، مورد تحقیق قرار گرفته و نشان داده شده است که ارتعاشات سیستم تا حد امکان کاهش یافته و ناحیه پایداری نیز به میزان قابل توجهی گسترش یافته است.

کلیدواژه‌ها


عنوان مقاله [English]

Micro-milling self-excited vibrations reduction using vibration absorbers

نویسندگان [English]

  • Saleh Shakeri
  • Farhad Sheykh Samani
چکیده [English]

The goal of this paper is to minimize self-excited vibration in the micro-milling process. This goal is achieved by using passive linear and nonlinear vibration absorbers. By reducing this unwanted vibration the final surface will have better surface quality. In this paper the micro-milling process is modelled as a two degree of freedom system and the effect of the cutting tool eccentricity is considered. To have stability for the larger depth of cut the optimal parameters for the passive vibration absorber is defined by a developed algorithm. The effects of vibration absorber on the stability and time response are investigated. The results show that using an optimal vibration absorber the vibration amplitude decreased and stability zone enlarged sensibility.

کلیدواژه‌ها [English]

  • Nonlinear vibration
  • self-excited vibration
  • micro-milling process
  • vibration absorbers
  • stability

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