مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

اثر ارتعاشات اولتراسونیک بر دقت هندسی قطعه کار در فرزکاری آلومینیوم 6061–T6

نوع مقاله : پژوهشی اصیل

نویسندگان
دانشگاه کاشان
چکیده
دستیابی به دقت مورد نیاز ابعادی و هندسی و همچنین کیفیت ظاهری و عملکردی در ماشینکاری قطعات صنعتی و میسر شدن تعویض پذیری در مونتاژ و تامین لوازم یدکی محصولات، یکی از چالش های مهم صنعت بوده است. در این پژوهش تاثیر افزودن ارتعاش اولتراسونیک محوری به ابزار، روی دقت هندسی قطعه کاری از جنس Al 6061-T6 در فرآیند فرزکاری مورد بررسی قرار گرفت. با تحلیل نتایج مشخص شد که حضور ارتعاش اولتراسونیک محوری توازی و تختی دیواره و صافی سطح کف و همچنین تعامد دیواره با کف را بهبود میدهد. سرعت پیشروی بیشتر، انحرافات هندسی و زبری سطح را افزایش می­دهد در حالی که سرعت برشی بیشتر، باعث کاهش آنها می­شود. با مقایسه نمودار­ها مشخص شد که اثر مثبت ارتعاشات اولتراسونیک بر کیفیت سطح و دقت هندسی قطعه کار، در شرایط سرعت برشی کمتر و پیشروی بیشتر، محسوس­تر است؛ یعنی شرایطی که با وجود آن در فرزکاری متداول، با بدترین کیفیت سطح و کمترین دقت هندسی روبرو می­شویم.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

The Effect of Ultrasonic Vibrations on the Geometric Accuracy of the Work Piece in Aluminum 6061-T6 Milling

نویسندگان English

Saeid Amini
Mohammad Ali Rahmanifar
چکیده English

Achieving the required dimensional and geometrical accuracy as well as the appearance and performance quality in the production of industrial parts and the availability of interchangeability in the assembly and supply of spare parts for products has been one of the important challenges of the industry. In this research, the effect of adding axial ultrasonic vibration to the tool on the geometric accuracy of the Al6061-T6 work piece in the milling process was investigated. By analyzing the results, it was found that the presence of axial ultrasonic vibration improves the parallelism and flatness of the wall and the smoothness of the bottom surface as well as the perpendicularity of the wall with the bottom. It was also observed that a higher feed speed increases geometric deviations and surface roughness, while a higher cutting speed reduces them. By comparing the graphs, it was found that the positive effect of ultrasonic vibrations on the quality of the surface and the geometric accuracy of the work piece is more noticeable in the conditions of lower cutting speed and higher feed; That is, the condition in which we face the worst surface quality and the lowest geometric accuracy in conventional milling.

کلیدواژه‌ها English

Ultrasonic Vibration
Geometric Accuracy
milling
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