tailieunhanh - Effect of thrust and torque exerted during drilling to optimize exit burr height and thickness by choosing variable drill bit geometry: A simplified theoretical model approach

In this paper, we developed an analytical models for thrust force, torque and burr size with variable clearance angle of drill bit geometry especially for Aluminium alloys used for automotive applications. | Effect of thrust and torque exerted during drilling to optimize exit burr height and thickness by choosing variable drill bit geometry A simplified theoretical model approach International Journal of Data and Network Science 4 2020 43 56 Contents lists available at GrowingScience International Journal of Data and Network Science homepage ijds Effect of thrust and torque exerted during drilling to optimize exit burr height and thickness by choosing variable drill bit geometry A simplified theoretical model approach R. Sreenivasulua Ch. Srinivasa Raob and K. Ravindraa a Department of Mechanical Engineering . amp of Engineering Autonomous Chowdavaram Guntur Andhra Pradesh India b Department of Mechanical Engineering University College of Engineering Autonomous Andhra University Visakhapatnam Andhra Pradesh India CHRONICLE ABSTRACT Article history In precision manufacturing especially in making of holes on the parts during drilling process for Received July 1 2019 precision assembling of parts facing problems with burr formation. Drilling is one of the finishing Received in revised format July operations in the production cycle removal of burrs during drilling process is a time consuming 22 2019 and non-value added process to the manufacturing sector. In this paper we developed an analyti- Accepted August 30 2019 Available online August 30 2019 cal models for thrust force torque and burr size with variable clearance angle of drill bit geometry Keywords especially for Aluminium alloys used for automotive applications. An analytical model results Drilling were obtained by writing a code in MATLAB @ 2010 software for aluminium alloy series such Aluminium alloys as Al 6061 Al 2014 and Al 7075. In an economic front developed mathematical models are Burr formation benefitted to reduce experimentation these results reveal that at the beginning of the drilled hole Thrust force due to indentation of chisel edge more thrust and torque .