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تأثیر استراتژیهای نوین پرداختکاری بر قابلیت ماشینکاری و تلورانسهای هندسی سطوح انحنادار با فرم آزاد | ||
مکانیک هوافضا | ||
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 11 دی 1403 اصل مقاله (712.86 K) | ||
نوع مقاله: گرایش ساخت و تولید | ||
نویسنده | ||
فرزاد پشم فروش* | ||
دانشیار، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران | ||
تاریخ دریافت: 07 آبان 1403، تاریخ بازنگری: 27 آذر 1403، تاریخ پذیرش: 08 دی 1403 | ||
چکیده | ||
دستیابی به کیفیت سطح بالا، دقت ابعادی، و بهرهوری در قطعات با فرم آزاد و هندسههای پیچیده سهبعدی، بهویژه در صنایعی مانند هوافضا و پزشکی، از اهمیت ویژهای برخوردار است. در این پژوهش، تأثیر سه استراتژی نوین پرداختکاری شامل اسپیرال، تصویرسازی منحنی، و پرداخت شیبهای تند و ملایم بر زبری سطح، خطای فرم (بهعنوان تلورانس هندسی)، و نرخ برادهبرداری بررسی شد. شبیهسازیها توسط نرمافزار پاورمیل و آزمایشهای تجربی با استفاده از دستگاه فرز CNC انجام شدند. نتایج نشان داد که استراتژی پرداخت شیبهای تند و ملایم با ارائه زبری سطح µm 077/0 و خطای فرم mm 0184/0 به ترتیب با بهبود 49/27% و 86/76% نسبت به سایر استراتژیها، بهترین عملکرد را از منظر کیفیت سطح و دقت هندسی ارائه داده است. در مقابل، استراتژی اسپیرال با نرخ برادهبرداری gr/s 1325/0 و زمان ماشینکاری 30 دقیقه، بالاترین بهرهوری را نشان داد و نرخ برادهبرداری آن نسبت به کمترین مقدار، به میزان 8/19% بهبود یافت. این نتایج تأکید میکنند که انتخاب استراتژی پرداختکاری باید بر اساس تعادل میان کیفیت سطح، دقت هندسی، و بهرهوری فرآیند، متناسب با نیازهای کاربردی هر قطعهکار صورت گیرد. | ||
تازه های تحقیق | ||
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کلیدواژهها | ||
استراتژیهای ماشینکاری؛ طراحی و ساخت بهکمک کامپیوتر؛ قطعات انحنادار با فرم آزاد؛ تلرانسهای هندسی؛ صافی سطح | ||
عنوان مقاله [English] | ||
Effect of Novel Finishing Strategies on the Machinability and Geometrical Tolerances of Free-Form Curved Surfaces | ||
نویسندگان [English] | ||
Farzad Pashmforoush | ||
Associate Professor, Faculty of Engineering, University of Maragheh, Maragheh, Iran | ||
چکیده [English] | ||
Achieving high surface quality, dimensional accuracy, and productivity in free-form and complex 3D geometries is crucial, especially in industries such as aerospace and medicine. This study investigates the effects of three modern finishing strategies—spiral, curve machining, and steep and shallow—on surface roughness, form error (as a geometric tolerance), and material removal rate. Simulations were performed using PowerMILL software, and experimental tests were conducted on a CNC milling machine. The results showed that the steep and shallow strategy delivered the best performance in terms of surface quality and geometric accuracy, achieving a surface roughness of 0.077𝜇𝑚 and a form error of 0.0184mm, with improvements of 27.49% and 76.86%, respectively, compared to other strategies. Conversely, the spiral strategy exhibited the highest productivity, with a material removal rate of 0.1325gr/s and a machining time of 30 minutes, demonstrating a 19.8% improvement in material removal rate compared to the lowest-performing strategy. These findings emphasize the importance of selecting a finishing strategy that balances surface quality, geometric accuracy, and process productivity to meet the specific requirements of each workpiece. | ||
کلیدواژهها [English] | ||
Machining strategies, CAD/CAM, Curved free-form specimens, Geometrical tolerances, Surface roughness | ||
مراجع | ||
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