Development of Cylindrical Grinding Attachment for Lathe Machine Jeco Eivin B. Deldoc, Carl Stephen T. Martillano, Ryan Daves M. Santillan and Nathan Rev G. Valdez.--

Bachelor's thesis

College of Industrial Technology.-- Bachelor of Engineering Technology major in Mechanical Technology Technological University of the Philippines 2023.

Includes bibliographic references and index.

The purpose of the study, development of cylindrical grinding attachment for lathe
machine, is to offer a safe, comfortable, economic, and accessible grinding process to
professors, students, and lathe machine owners. Its features include direct mounting to
the lathe tool post, potentiometer controlling the DC motor's speed, power supply that
converts electricity from AC to DC, proximity sensor that reads the RPM of the DC
motor, digital tachometer that displays the RPM of the DC motor, and a fixture for the
grinding attachment's vertical movement. The prototype undergo several tests, and these
are its maximum and minimum RPM, voltage of the DC motor in various speed, height
of the cylindrical grinding attachment from the fixture to the center of the lathe chuck,
Material Removal Rate, and comparative analysis between the surface roughness of the
workpiece machined in lathe and to the prototype. The average minimum RPM was
114.33 and maximum RPM of 11, 143.33. The first voltage measurement was 6.57 at
RPM 1, 020 and a final voltage reading of 104.6 at RPM 11, 190, which is the maximum
RPM. The average height of cylindrical attachment was 98.27mm. The MMR result was
3.2866 mm3/s in 6 passes. Lastly the prototype achieved Ra 1.6μm section profile. The
prototype was evaluated by 30 evaluators composed of students, professors, and
professionals and was rated of 4.37 over all mean with a descriptive rating of “Very
Good”. This signifies that the prototype is functional and achieved its purpose.