بررسی تاثیر سرعت برش و عمق براده‌برداری بر نانو‌‌ماشین‌‌‌کاری آلیاژ نیکل-آهن-کروم با روش سطح‌پاسخ به‌کمک دینامیک‌مولکولی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه اراک، اراک، ایران

2 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه شهرکرد، شهرکرد، ایران

3 دانشکده مهندسی مکانیک - دانشگاه صنعتی اراک - اراک - ایران

چکیده
ماشینکاری فوق دقیق به فرآیند ساخت قطعات با دقت بسیار بالا اشاره دارد که در صنایعی مانند هوافضا، پزشکی، اپتیک و الکترونیک که در آن‌ها تلرانس‌های نانومتری، پوشش‌های سطحی ظریف و هندسه‌های دقیق ضروری است، مورد نیاز است. در این پژوهش فرآیند نانوماشین‌کاری آلیاژ نیکل-آهن-کروم چند کریستال با استفاده از روش دینامیک مولکولی بررسی شده است. بررسی تاثیرات پارامتر‌های سرعت برش و عمق براده برداری بر روی این فرآیند به روش سطح پاسخ نشان دهنده این است که با کاهش سرعت برش از 400 تا 10 متر ‌بر ‌ثانیه، عمق براده برداری از 5 تا 5/0 نانومتر مقادیر نیروهای برشی، نیروهای عمودی و تنش ون‌میسز قطعه‌کار به‌ترتیب 9/65، 4/23 و 58/25 درصد کاهش می‌‌یابند. علاوه بر این زمانی که عمق براده برداری 5/0 نانومتر، سرعت برش 10 متر ‌بر ‌ثانیه بود، دما به 82/308 کلوین و نیروهای ماشین‌کاری یعنی نیروهای برشی و نیروهای عمودی به 42/152 و 2/221 (eV/n) رسیده که کمینه شده و حالت بهینه‌سازی شده فرآیند ماشین‌کاری حاصل شده است. درنهایت، تغییرات ساختاری بررسی شده به‌وسیله‌ی تابع توزیع شعاعی نشانگر این است با افزایش سرعت برش از 10 به 400 متر بر ثانیه در عمق براده برداری 75/2 نانومتر، تابع توزیع شعاعی 10 واحد افزایش داشته که تغییرات ساختاری قطعه کار را موجب شده است.

کلیدواژه‌ها


عنوان مقاله English

Investigating the effect of cutting speed and cutting depth during nickel-iron-chromium alloys nano machining of by response surface methodology and molecular dynamics simulation

نویسندگان English

mojtaba zolfaghari 1
hamed heydari 2
mohammad javad ghasemi 1
vahid tahmasbi 3
1 School of Mechanic Engineering, Arak University, Arak, Iran
2 School of Mechanic Engineering, Shahrekord University, Shahrekord, Iran
3 Department of Mechanical Engineering, Arak University Of Technology, Arak, Iran
چکیده English

Ultra-precision machining refers to the process of manufacturing very high-precision parts that are required in industries such as aerospace, medicine, optics, and electronics, where nanometer tolerances, fine surface coatings, and precise geometries are essential. In this research, the nano-machining process of polycrystalline nickel-iron-chromium alloy has been investigated using the molecular dynamics method. Investigating the effects of cutting speed and cutting depth parameters on this process by the response surface method shows that by reducing the cutting speed from 400 to 10 m/s, the cutting depth from 5 to 0.5 nm, the values of cutting forces, normal forces and the Von Mises stress of the workpiece decreases by 65.9, 23.4 and 25.58 percent, respectively. When the cutting depth was set to 0.5 nm and the cutting speed was 10 m/s, the temperature reached 308.82 K. At this state, the machining forces—including cutting forces and Thrust force —were measured at 152.42 and 221.2 (eV/n), respectively. This configuration minimizes the machining forces, resulting in an optimized state for the machining process. The investigation of structural changes using the radial distribution function shows that increasing the cutting speed from 10 m/s to 400 m/s, while maintaining a cutting depth of 2.75 nm, results in an increase of 10 units in the radial distribution function. This change has contributed to the structural alterations of the workpiece.

کلیدواژه‌ها English

Nano-machining
polycrystalline alloy
molecular dynamics
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دوره 5، شماره 3
پاییز 1404
صفحه 342-365

  • تاریخ دریافت 30 آذر 1403
  • تاریخ بازنگری 26 دی 1403
  • تاریخ پذیرش 04 اسفند 1403