کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
791600 1466759 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling of twist drills wear by a temperature-dependent friction law
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Modeling of twist drills wear by a temperature-dependent friction law
چکیده انگلیسی

In this paper an analytical model is developed which predicts thrust force in the drilling with a twist drill. The thermomechanical properties are accounted for to describe the material flow in the primary shear zone and at the element–chip interface. The chip flow is determined by the assumption that the friction force on the tool face is collinear to the chip flow direction. The model permits to predict the chip flow direction, the contact length between the chip and the tool and the temperature distribution at the tool–chip interface which has an important effect on the tool wear. A temperature friction law is introduced as μ¯=μ¯0(1−(T¯int/Tf)q) and the pressure on the tool–chip interface was modeled as p(Zfl)=p0ξ(1−Zfl/lC)p(Zfl)=p0(1−Zfl/lC)ξ where T¯int is the mean temperature in the shear interface and lC is the contact length between the chip and the drill. Using the thermo-viscoplastic model and the temperature friction law, the tangential forces, friction coefficient and contact length on the cutting element as a function of radius, for different feed rate and cutting speed, are obtained. The proposed model results are compared with experimental results and good agreement is obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 207, Issues 1–3, 16 October 2008, Pages 98–106
نویسندگان
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