بررسی سوراخ کاری لوله های کامپوزیتی تولید شده به روش رشته پیچی با استفاده از روش طراحی عاملی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه تفرش، تفرش، ایران

چکیده

سوراخ­کاری یکی از فرآیندهای اصلی ماشین کاری برای تکمیل کردن فرآیند ساخت و مونتاژ در لوله های کامپوزیتی می باشد. هنگام سوراخ کاری ممکن است آسیب هایی نظیر جدایش لایه­ ای و ترک ماتریس در اطراف سوراخ، باعث افت استحکام باقیمانده­ی لوله­ های کامپوزیتی شود. در این مقاله اثر پارامترهای سوراخ کاری نظیر سرعت اسپیندل، سرعت پیشروی، قطر و شکل مته سوراخ کاری بر نیروی محوری و فاکتور جدایش لایه­ ای، برای لوله ­های کامپوزیتی که به روش رشته ­پیچی تولیدشده اند، به کمک روش طراحی عاملی بررسی گردید. مطابق نتایج پارامترهای تأثیرگذار بر فاکتور جدایش لایه ­ای به ترتیب شکل هندسی مته، سرعت پیشروی، قطر مته و سرعت اسپیندل تعیین گردید. مطابق نتایج با انتخاب ابزار مته مارپیچ با قطر 12 میلی متر، سرعت اسپیندل 1000 دور در دقیقه و سرعت پیشروی 25 میلی متر بر دقیقه، میزان فاکتور جدایش لایه ای به حداقل اندازه ممکن می­رسد. بهترین و بدترین نمونه سوراخ کاری شده ازنظر ابعاد منطقه خرابی تحت آزمایش فشار قرار داده شد و استحکام باقیمانده فشاری آن بررسی گردید. مطابق نتایج با کاهش فاکتور جدایش لایه ای استحکام باقیمانده فشاری افزایش می یابد. همچنین اگر پارامترهای ورودی در سوراخ کاری به درستی انتخاب گردد، در مته مارپیچ 8 میلی متری نسبت به مته بردپوینت با همان قطر، در حدود 12 درصد استحکام باقیمانده فشاری افزایش می یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Study in Drilling Composite Pipes Manufactured by Filament Winding Process Using Full Factorial Design Method

نویسندگان [English]

  • M. Sahami poor Dehghan
  • H. Heidaryb
Department of mechanical engineering, Tafresh University, Tafresh, Iran
چکیده [English]

Drilling is one of the major machining processes for assembling process in composite tubes. During drilling, damages such as matrix cracking, fiber pull out and delamination around the hole may cause the loss of residual compression strength of the composite tubes. In this paper, the effect of drilling parameters such as spindle speed, feed rate, diameter and geometry shape of the drill on thrust force and delamination factor with full factorial design method for composite tubes manufactured by filament winding process was investigated. According to the results, the parameters affecting the delamination factor are the geometric shape of the drill, feed speed, drill diameter and spindle speed, respectively.  Also, by selecting twist drill tools with a diameter of 12 mm, spindle speed of 1000 rpm and feed rate of 25 mm/min, the  amount of delamination factor is minimized. The residual compressive strength of the best and worst specimens according to delamination factor was investigated. According to the results, by decreasing delamination factor, the residual compressive strength increases. Also, if the input parameters in the drilling process are selected correctly, the residual compressive strength would increase around 12%.

کلیدواژه‌ها [English]

  • Drilling of composite tubes
  • Delamination factor
  • Residual compression strength
  • Full factorial design
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