مطالعه تجربی بر روی ماشین‌کاری جریان ساینده مفصل ران مصنوعی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه میبد، میبد، ایران.

2 گروه مهندسی مکانیک، دانشکده مهندسی مکانیک، دانشگاه صنعتی امیرکبیر، تهران، ایران.

چکیده

ماشین‌کاری یکنواخت سر فمورال مفصل ران مصنوعی به دلیل هندسه خاص آن، همواره به‌عنوان یک چالش‌ فنی مطرح بوده است. این پژوهش با طراحی و توسعه یک فیکسچر ماکت معکوس نوآورانه، راهکار مؤثری برای بهبود فرآیند ماشین‌کاری جریان ساینده  ارائه می‌کند. در این راستا، ابتدا نمونه صنعتی فرآیند ماشین‌کاری جریان ساینده ساخته شد و سپس فیکسچر متناسب با هندسه سر فمورال تولید گردید. ارزیابی عملکرد دستگاه و روش پیشنهادی با بررسی تأثیر پارامترهای کلیدی فرآیند ماشین‌کاری جریان ساینده  شامل فشار اکستروژن هیدرولیک، تعداد سیکل‌های ماشین‌کاری و اندازه مش ساینده کاربید سیلیسیوم بر میانگین درصد تغییر در زبری سطح  سر فمورال مفصل ران مصنوعی ساخته‌شده از فولاد زنگ نزن L316 انجام شد. نتایج این پژوهش نشان می‌دهد که دستگاه و روش پیشنهادی، روشی کارآمد و مؤثر برای ماشین‌کاری یکنواخت سر فلزی فمورال است. آزمایش‌های انجام‌شده نه‌تنها کارایی این روش را تأیید می‌کنند، بلکه نشان می‌دهند که  میانگین درصد تغییر در زبری سطح  نمونه‌ها با استفاده از ساینده‌های با مش  240، 600 و 1000 به ترتیب 40/40/%، 86/12% و 90/61% بهبود یافته است. همچنین، بررسی مورفولوژی سطح نمونه‌ها نشان داد که روش پیشنهادی سطحی صاف و یکنواخت بدون آسیب‌های سطحی ایجاد کرده است که منجر به بهبود یکپارچگی سطح مفصل ران مصنوعی می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

An Experimental Study on Abrasive Flow Machining of Artificial Hip Joint

نویسندگان [English]

  • Yahya Choopani 1
  • Mohsen Khajehzadeh 2
  • Mohammad Reza Razfar 2
1 Assistant Professor, Department of Mechanical Engineering, Meybod University
2 Associate Professor, Mechanical Engineering Department, Amirkabir University of Technology
چکیده [English]

Due to its unique geometry, the uniform machining of the femoral head in artificial hip joints has consistently posed a significant technical challenge. This study presents an effective solution for improving the abrasive flow machining (AFM) process through the design and development of an innovative inverse replica fixture. To this end, first an industrial prototype of the AFM system was fabricated, followed by the production of a fixture tailored to the geometry of the femoral head. The performance evaluation of the proposed device and method was conducted by examining the effects of key AFM process parameters, including hydraulic extrusion pressure, silicon carbide abrasive mesh size, and the number of machining cycles, on the average percentage change in surface roughness (%∆Ra) of a femoral head made from 316L stainless steel. The results demonstrate that the proposed device and methodology provide an efficient and effective approach for achieving uniform machining of the femoral head. Experimental findings not only corroborate the efficacy of the method but also reveal that the average %∆Ra of the samples improved by 40.40%, 86.12%, and 90.61% when using abrasives with mesh sizes of 240, 600, and 1000, respectively. Moreover, surface morphology analysis indicated that the proposed method produces a smooth and uniform surface without inducing surface damage, thereby enhancing the surface integrity of the artificial hip joint.

کلیدواژه‌ها [English]

  • Abrasive Flow Machining
  • Artificial Hip Joint
  • Inverse Replica Fixture
  • Machining Tool
  • Surface Roughness

مراجع

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نشریه مهندسی مکانیک امیرکبیر
دوره 57، شماره 2
1404
صفحه 215-234

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