بررسی تجربی تاثیر پارامترهای جوش آلتراسونیک در استحکام و جوش‌پذیری اتصال کامپوزیت‌های گرمانرم GF/PA6

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

2 دانشیار، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

3 استادیار، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران

10.22034/ijme.2023.415429.1827

چکیده

در این مقاله، جوشکاری آلتراسونیک کامپوزیت‌های گرمانرم با تأکید بر جوش‌پذیری و ارزیابی کیفیت اتصال، تولید گرما و شکل‌گیری اتصال مطالعه شده و تاثیر نیروی جوشکاری، دامنه ارتعاش، جهت الیاف، جابجایی هورن بررسی شده است. در این پژوهش قطعات کامپوزیتی شامل مواد پلی آمید 6  و الیاف شیشه پیش آغشته تک جهته، در دو نوع لایه چینی (90/90/0/0) s  و (0/90/-45/45/90/0)s با هدایت کننده‌ی انرژی به شکل تخت با ضخامت 0.14 میلی‌متر آماده شدند. سه دامنه ارتعاش 51.8 ، 74.5 و86.2 میکرومتر و نیروی جوشکاری 300، 500 و 1000 نیوتن با سه زمان جوشکاری 300، 500 و 900 میلی ثانیه در نظر گرفته شده است. نتایج حاصل از آزمایش نشان می‌دهد بیش‌ترین استحکام جوش 25.5 مگاپاسکال بدست آمد که در دامنه ارتعاشات 86.2 میکرومتر و نیروی جوشکاری 500 نیوتن و زمان جوشکاری 500 میلی ثانیه اتفاق می‌افتد. همچنین مشاهده می‌شود که مقدار حداکثر توان مصرفی تحت تاثیر دامنه ارتعاشات و نیروی جوشکاری است و با تغییر جهت الیاف لایه اول کامپوزیت از 90 درجه به 0 درجه استحکام جوش بیش از دو برابر افزایش می‌یابد.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental investigation of the effect of ultrasonic welding parameters on the strength and weldability of GF/PA6 thermoplastic composites

نویسندگان [English]

  • Mohammad Sadeghi 1
  • Mohammad Golzar 2
  • Davood Akbari 3
  • Mohammad Reza Karafi 3
1 PhD Student, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
2 Associate Professor, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
3 Assistant Professor, Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
چکیده [English]

In this article, ultrasonic welding of thermoplastic composites has been studied with an emphasis on weldability and joint quality evaluation, heat generation and joint formation, and the effect of welding force, vibration amplitude, fiber direction, horn displacement has been investigated. In this research, composites including PA6 and unidirectional pre-impregnated glass fibers, in two types of lay-outs (90/90/0/0)s and (0/90/-45/45/90/0)s with an energy director of flat shape with a thickness of 0.14 mm. Three vibration amplitudes of 51.8, 74.5 and 86.2 μm and welding force of 300, 500 and 1000 N with three welding times of 300, 500 and 900 ms are considered. The results of the test show that the highest welding strength of 25.5 MPa was obtained, which occurs in the vibration amplitude of 86.2 μm and the welding force of 500 N and the welding time of 500 ms. It can also be seen that the amount of maximum power consumption is affected by vibration amplitude and welding force, and by changing the direction of the fibers of the first layer of the composite from 90 degrees to 0 degrees, the welding strength increases more than twice.

کلیدواژه‌ها [English]

  • Ultrasonic Welding
  • Thermoplastic Composites
  • Fiber Orientation
  • Maximum Power Consumption

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