بررسی تأثیر پارامتر‌های هندسی بر عیوب در فرآیند شکل‌دهی غلتکی کانال نامتقارن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه تربیت مدرس

2 دانشگاه یزد

3 تربیت مدرس

4 دانشگاه آزاد اسلامی واحد قزوین

چکیده

در این مقاله ضمن تحلیل عیب‌های پیچش و انحنای طولی در فرآیند شکل‌دهی غلتکی مقاطع کانالی شکل نامتقارن، اثر پارامتر‌های هندسی مختلف روی این عیوب بررسی شده است. ابتدا مدل اجزای محدود فرآیند با قابلیت پیش‌بینی عیوب ایجاد و برای ارزیابی اعتبار نتایج اجزای محدود، آزمایش‌هایی تجربی انجام شد. سپس با تکرار شبیه‌سازی اجزای محدود اثر پارامترهای هندسی مختلف شامل ضخامت ورق، پهنای کف و عرض بال‌های کانال روی عیوب یاد شده بررسی شد. نتایج نشان داد که با افزایش ضخامت ورق و پهنای کف کانال، زاویه پیچش کاهش می‌یابد و افزایش عرض بال‌های کانال، زاویه پیچش مقطع را افزایش می‌دهد. هم‌چنین روند تغییرات انحنای طولی مشابه با روند تغییرات میانگین کرنش‌های طولی باقی‌مانده در لبه‌ بال‌های کانال می‌باشد.
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کلیدواژه‌ها


عنوان مقاله [English]

Geometry Effects of Asymmetrical Channel Sections on Common Defects in the Roll Forming Process

نویسندگان [English]

  • yaser tajik 1
  • Hasan Moslemi Naeini 1
  • Roohollah Azizi Tafti 2
  • davod akbari 3
  • Mohammad Mehdi Kasaei 4
1 Tarbiat Modares University
2 Yazd University
3 modares
4 Islamic Azad University of Qazvin
چکیده [English]

In this research, the twist and the longitudinal bow defects were studied by finite element analysis in the asymmetrical channel sections. Effects of the geometrical properties including the strip thickness, the web width, and the flange width were investigated on the above effects. Some experiments were performed on an industrial roll-forming machine to verify the accuracy of the finite element model. The results showed that the twist angle decreases with the increase of both strip thickness and web width. However, the twist angle increases with the increase of flanges width. Also the variations of the longitudinal bow height are similar to those of the average residual longitudinal strain of both flange edges.

کلیدواژه‌ها [English]

  • Cold roll-forming
  • Asymmetrical-channel section
  • Twist defect
  • Longitudinal bow
  • Finite element simulation
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