مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تاثیر سختی قطعه‌کار و پارامترهای برشی بر دما، زبری سطح و فرسایش ابزار در تراشکاری به کمک ارتعاشات التراسونیک

نوع مقاله : پژوهشی اصیل

نویسندگان
مسعود بیات
سعید امینی
گروه ساخت و تولید، دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان، ایران
10.52547/mme.22.6.357
چکیده
ماشین‌کاری قطعات سخت یکی از مهم‌ترین چالش­های صنایع تولیدی است. از این رو روش­های نوینی به ماشین‌کاری سنتی افزوده شده است. ماشین‌کاری به کمک ارتعاشات التراسونیک از جمله این روش­ها است. مزایای استفاده از ارتعاشات التراسونیک نسبت به ماشین­کاری سنتی شامل کاهش نیروهای ماشین­کاری، کاهش سایش ابزار و اصطکاک، افزایش عمر ابزار، ایجاد شرایط برشی متناوب، افزایش قابلیت ماشین­کاری مواد سخت برش و غیره است. برای ارتعاش ابزار، یک هورن از جنس فولاد با فرکانس تشدید 20633 هرتز توسط نرم­افزار آباکوس تحلیل و سپس ساخته شد. در این مطالعه، اثرات پارامترهای سرعت دورانی، نرخ پیشروی، شرایط ماشین‌کاری معمولی و ارتعاشی در سه سختی 15، 30 و 45 راکول سی مختلف برای قطعه­کار بر دمای ماشینکاری، زبری سطح و فرسایش ابزار مورد ارزیابی قرار گرفت. طراحی آزمایش­ها به صورت فاکتوریل کامل بوده و در مجموع، 54 آزمایش انجام شد. نتایج نشان داد در سختی­های بالاتر توسط اعمال ارتعاشات زبری سطح کاهش یافت. زبری سطح Ra)) در ماشین­کاری به کمک ارتعاشات التراسونیک نسبت به ماشین­کاری معمولی در پارامترهای مختلف ماشین‌کاری تا حدود 36 درصد کمتر است. همچنین با افزایش سختی قطعه­کار فرسایش ابزار بیشتر شده است که توسط اعمال ارتعاشات التراسونیک این فرسایش ابزار نسبت به حالت ماشین­کاری معمولی کمتر است. علاوه بر این دمای ماشینکاری در مجموع در سختی­های بالاتر قطعه کار در حالت ارتعاشی حداکثر 15 درصد کمتر است. با اعمال ارتعاشات فرسایش ابزار در مجموع کاهش یافته است که می­توان با انتخاب ابزار سرمتی و اعمال ارتعاشات شرایط فرسایش ابزار را در ماشین‌کاری فولاد 4140 AISI به حداقل رساند.
کلیدواژه‌ها
تراشکاری
ماشین‌کاری به کمک ارتعاشات التراسونیک
عمر ابزار
دمای ماشین‌کاری
زبری سطح
فولاد AISI 4140
سختی قطعه کار

موضوعات

عنوان مقاله English

The effect of workpiece hardness and cutting parameters on temperature, surface roughness and tool wear in ultrasonic assisted turning

نویسندگان English

Masuod Bayat
Saeid Amini
Manufacturing Department, Mechanical Engineering Faculty, University of Kashan, Kashan, Iran
چکیده English

Machining of hard workpieces is one of the most important challenges of the manufacturing industry. Hence, new methods were added to traditional machining. Ultrasonic vibration machining is one of these methods. The advantages of using ultrasonic vibrations compared to traditional machining include reducing machining forces, reducing tool wear and friction, increasing tool life, creating intermittent cutting conditions, increasing surface quality, and so on. To vibrate the tool, a horn with a resonant frequency of 20,633 Hz was analyzed by Abacus software. In this study, the effects of cutting speed, feed rate, conventional machining conditions, and vibration machining conditions at three different hardness of 15, 30, and 45 Rockwell C for the workpiece on surface roughness and tool wear were evaluated. The experiments were designed at full factorial, and a total of 54 experiments were performed. The results showed that at higher workpiece hardness by applying vibration the surface roughness was reduced. The surface roughness (Ra) in machining by means of ultrasonic vibrations is up to about 36% less than conventional machining in various machining parameters. In addition, the temperature in vibration machining is lower about 15% at higher stiffness of the workpiece. Also, with the increase in the hardness of the workpiece, the tool wear was increased, which is less by applying ultrasonic vibrations. Also, by applying vibrations, tool wear was reduced in total, which can be minimized by selecting cermet tools and applying vibrations in 4140 AISI steel machining.

کلیدواژه‌ها English

Turning
Machining temperature
Ultrasonic assisted turning
tool life
Surface roughness
AISI 4140 Steel
Workpiece Hardness
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مهندسی مکانیک مدرس
دوره 22، شماره 6
خرداد 1401
صفحه 357-369