مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

ارزیابی عملکرد ابزار خود چرخان در تراشکاری

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
2 استادیار، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
3 دانشیار، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران
چکیده
ماشین‌کاری با ابزار چرخان با به‌کارگیری همه محیط ابزار به‌جای یک لبه برش خاص سبب کاهش سایش ابزار و در نتیجه افزایش عمر آن می‌شود. این روش ضمن سادگی سازوکار، یکی از ارزان‌ترین فرآیندهای سازگار با محیط‌زیست محسوب می‌شود. در تحقیقات صورت گرفته به نقش مهم زاویه تمایل بر خروجی‌ها اشاره شده است. بدین منظور در ابتدا با توجه به نیروها و شرایط هندسی ابزار گیر مناسب طراحی و ساخته شده است که امکان تغییر زاویه تمایل در آن وجود دارد. آلومینیم 7075 به‌عنوان قطعه کار انتخاب و عملیات تراشکاری با استفاده از ابزار مناسب انجام شده است. کیفیت سطح قطعه کار ‌‌بر اساس پارامترهای ورودی نظیر پیشروی و زاویه تمایل بررسی شده است. طراحی آزمایش بر مبنای فاکتوریل کامل است و در آن تأثیر تغییرات زاویه تمایل در 3 حالت و با 3 پیشروی متفاوت بررسی شده است. کاهش زاویه تمایل و همچنین کاهش پیشروی سبب بهتر شدن کیفیت سطح شده است. بهترین کیفیت سطح در زاویه تمایل 5 درجه و پیشروی 0/12 میلی‌متر بر دور ایجاد شده است. شکل براده‌ها و نحوه شکل‌گیری آن‌ها نیز موردبررسی قرارگرفته است. در زوایای تمایل بالاتر براده به شکل نوار بدون پیچ‌خوردگی تشکیل شد ولی با کاهش زاویه، براده مارپیچ حلزونی شکل گرفت.
کلیدواژه‌ها

عنوان مقاله English

Performance evaluation of self-propelled rotary tool in turning

نویسندگان English

Mohammad Azizi Yousefvand 1
Habibollah Akbari 2
Behnam Davoodi 3
1 Ph.D. Student, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
2 Assistant Professor, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
3 Associate Professor, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
چکیده English

Machining with rotary tools using all insert circumstances instead of a specific cutting edge reduces tool wear and thus increases its life. This method, in addition to the simplicity of the mechanism, is considered one of the cheapest environmentally friendly processes. The important role of the inclination angle on the outputs has been pointed out. For this purpose, according to the forces and geometrical conditions, a suitable tool holder is designed and built in which it is possible to change the inclination angle. Aluminum 7075 has been selected as the workpiece, and the turning operation has been done using appropriate tools. The surface roughness of the workpiece is measured based on input parameters such as feed and inclination angle. The design of the experiment is based on full factorial design, and surface roughness has been measured based on the angle of inclination in three modes and three different feeds. Reducing the inclination angle and the feed has improved the quality of the surface. The best surface roughness has been at an inclination angle of 5 degrees and an advance of 0.12 mm/round. The shape of the chips has also been investigated. Ribbon-type chips were formed at higher inclination angles, but conical helical chips were formed as the inclination angle decreased.

کلیدواژه‌ها English

Self-Propelled Rotary Tool
Inclination Angle
Chip Formation
Surface Roughness
Al 7075
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