فصلنامه علمی کارافن

فصلنامه علمی کارافن

بهبود استحکام کششی قطعات پلیمری چاپ‌شده به روش مدل‌سازی رسوب ذوبی با اعمال پرس گرم و بهینه‌سازی پارامترهای فرایند

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان
1 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران.
2 استادیار، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران.
چکیده
در فناوری‌های چاپ سه‌بعدی، تولید قطعات پلیمری با خواص مکانیکی مطلوب، از اهمیت چشمگیری برخوردار است. یکی از رایج‌ترین فرایندهای چاپ سه‌بعدی برای تولید قطعات پلیمری، روش مدل‌سازی رسوب ذوبی است. با این وجود، به دلیل ضعیف‌بودن اتصال بین‌لایه‌ای قطعات چاپ‌شده و در نتیجه ضعف خواص مکانیکی، لازم است پیوند بین لایه‌ای بهبود یابد. در این تحقیق ترکیب پارامترهای چاپ سه‌بعدی (زاویه چاپ) و عملیات تکمیلی پرس گرم (دما و نیروی پرس گرم) مطالعه شده است. همچنین بهینه‌سازی هم‌زمان این پارامترها با هدف رسیدن به بالاترین استحکام کششی در قطعات چاپ‌شده از جنس پلی‌لاکتیک اسید انجام شد. بدین منظور طراحی آزمایش به روش سطح پاسخ انجام شد و تغییر خواص کششی با تغییر در پارامترها ارزیابی گردید. نتایج نشان‌دهنده تأثیر متقابل بین پارامترهای موردمطالعه بود. مقادیر بهینه‌ پارامترهای زاویه چاپ، دما و نیروی پرس گرم به‌ترتیب 90 درجه، 70 درجه سانتی‌گراد و 25 نیوتن به‌دست آمد. در این شرایط، بالاترین استحکام کششی یعنی 33 مگاپاسکال به‌دست آمد که در مقایسه با نمونه اولیه حدود 22 درصد افزایش نشان داد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Improving the Tensile Strength of 3D-printed Polymer Parts Using the Fused Deposition Modeling by Hot Pressing and Optimizing the Process Parameters

نویسندگان English

Ali Jadali 1
Vahid Abedini 2
Abdolvahed Kami 2
1 MSc Student, Faculty of Mechanical Engineering, Semnan University, Semnna, Iran.
2 Assistant Professor, Faculty of Mechanical Engineering, Semnan University, Semnna, Iran.
چکیده English

In 3D printing technologies, producing polymer parts with desirable mechanical properties is crucial. The fused deposition modeling (FDM) technique is one of the most common 3D printing processes for manufacturing polymeric parts. However, due to the weak interlayer bonding of the printed parts and consequently inferior mechanical properties, enhancing interlayer bonding is necessary. This study investigated the combination of 3D printing parameters (printing angle) and post-processing via hot pressing (temperature and pressing force). Additionally, the simultaneous optimization of these parameters was conducted to achieve the highest tensile strength in parts made of polylactic acid (PLA). To this end, an experimental design was conducted using the response surface methodology (RSM), and changes in tensile properties concerning the studied parameters were evaluated. The results indicated an interaction between the studied parameters. The optimal values for the raster angle, pressing temperature, and pressure were 90 degrees, 70 degrees Celsius, and 25 N, respectively. Under these conditions, the highest tensile strength of 33 MPa was achieved, showing an approximately 22% increase compared to the initial sample.

کلیدواژه‌ها English

Additive Manufacturing
Fused Deposition Modeling
Hot Pressing
Mechanical Properties
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دوره 21، شماره 3
فنی و مهندسی
پاییز 1403
صفحه 231-253

  • تاریخ دریافت 27 اردیبهشت 1403
  • تاریخ بازنگری 04 مرداد 1403
  • تاریخ پذیرش 24 مهر 1403