مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

مدل سازی ریاضی، تحلیل حساسیت سوبل و بهینه سازی رفتار دما در فرآیند سوراخ کاری اتوماتیک استخوان

نویسندگان
مجید قریشی 1
مجتبی ذوالفقاری 2
وحید طهماسبی 3
حامد حیدری 4
1 دانشگاه صنعتی خواجه‌نصیرالدین طوسی
2 دانشگاه اراک، اراک، ایران
3 دانشگاه صنعتی اراک، اراک، ایران
4 دانشگاه اراک،اراک،ایران
چکیده
سوراخ‌کاری استخوان از مهم‌ترین فرآیند‌های بیومکانیکی است که در اعمال جراحی ارتوپدی کاربرد دارد. مهم‌ترین عارضه‌ای که ممکن است در عمل جراحی براده‌برداری از استخوان ایجاد شود، بالا رفتن دما از محدوده مجاز و ایجاد نکروز حرارتی در بافت استخوان می‌باشد. علی‌رغم پژوهش‌های فراوان، چگونگی تاثیر پارامتر‌های سرعت دورانی و نرخ پیشروی مته بر رفتار دما‌ی فرآیند مورد اختلاف پژوهشگران این حوزه است. در تحقیق حاضر، یک مدل‌سازی ریاضی و طراحی آزمایش دقیق صورت گرفته و با بهره‌گیری از روش سطح پاسخ یک مدل ریاضی به منظور تحلیل و پیش‌بینی رفتار پاسخ‌ها از نتایج آزمایش‌ها استخراج شده است. اثر هر یک از فاکتور‌های ورودی و بر‌هم‌کنش آن‌ها بر روی پاسخ فرآیند بررسی شده، که در محدوده این تحقیق با افزایش سرعت دورانی دما افزایش می-یابد اما رفتار نرخ پیشروی به علت زمان تماس مته و استخوان پیچیده است در نتیجه افزایش دما در نرخ‌های پیشروی پایین و افزایش دما به علت افزایش نیرو و اصطکاک در نرخ‌های پیشروی بالا اتفاق می‌افتد و نیز با افزایش قطر مته دما‌ی فرآیند افزایش می‌یابد. همچنین میزان حساسیت اثر هر یک از پارامتر‌ها به روش آنالیز حساسیت سوبل مورد بررسی قرار گرفته و با در نظر گرفتن تغییرات همزمان همه پارامتر‌ها در رفتار دما به ترتیب سرعت دورانی، نرخ پیشروی و قطر مته بیشتر‌ین اثر را داشته است. بهینه-سازی رفتار دمای فرآیند نیز ارائه گردیده، که کمینه دما، 37 درجه سانتی‌گراد، با بهره‌گیری از قطر مته 2.5 میلی‌متر، سرعت دورانی 500 دور بر دقیقه و نرخ پیشروی 30 میلی‌متر بر دقیقه، ایجاد می‌شود.
کلیدواژه‌ها
سوراخ‌کاری
استخوان
دما
روش سطح پاسخ
بهینه سازی

موضوعات

عنوان مقاله English

Investigation, sensitivity analysis and multi objective optimization of effective parameters on temperature in robotic drilling bone

نویسندگان English

M. Ghoreishi 1
Mojtaba zolfaghari 2
Vahid Tahmasbi 3
Hamed Heydari 4
1 Department, K.N. Toosi University of Technology
2 Department of Mechanical Engineering, University of Arak, Arak, Iran
3 Department of Mechanical Engineering, Arak University of Technology, Arak, Iran
4 Department of Mechanical Engineering, University of Arak, Arak, Iran
چکیده English

In orthopedic surgeries, the bone drilling is one of the most important biomechanic processes that has used. ،This mechanical process is very important, sensitive and all-purpose in biomechanical engineering, because its complexity and special conditions. Bone drilling process has advanced by roboots and CNC machin entrance into the realm of orthopedic surgeries. The problematic issue during operation is the high increase in drilling process temprature which leads to the so-called thermal necrosis . It is not clear quality of enfluence of tool rotational speed and feed rate on the temprature and force responses and so it can be seen confilicts among different researcher results frequently. In this paper it is performed mathematical modeling and design of experiments on the input factors and output parameters of bone drilling. The effect of input factors and interaction of input factors have investigated. Increasing rotational speed the temperature increases where as the feed rate behavior is complex because contact duration between drill bit and bone so the increasing temperature take places because the low feed rate or increasing force and friction. In addition increasing the drill bit diameter increases the tempratures. Also the sobol sensitivity analysis method has used to investigate effect of each parameter in which rotational speed, feed rate and drill bit diameter have most effect respectiviely on temperature instantaneously. Also optimization process performed on temperature behavior, hence the minimum temprature is 37 0C when the diameter of drill bit 2.5 mm, rotational speed 500 rpm and feed rate 30 mm/min.

کلیدواژه‌ها English

Drilling
Bone
Temperature
Response surface method
Optimization
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مهندسی مکانیک مدرس
دوره 18، شماره 5
شهریور 1397
صفحه 142-153