Comparison of coated and uncoated carbide drill bits for drilling titanium grade 2 material

Vijaan V,N Baskar,B Suresh Kumar

doi:10.5755/j01.mech.22.6.13467

Abstract

The performance of TiAlN coated and uncoated carbide drill bits when drilling titanium alloy were investigated on vibration, thrust force, torque, machining time, burr dimensions and surface roughness. In response, the experiments were carried out on CNC vertical milling machine with two factors and each factor consists of three levels. For experimentation, the ranges of spindle speed and feed rate selection is based on tool manufacturer recommendations. In addition, the effects of spindle speed and feed rate on considered responses were explored and the same is presented in this paper. DOI: http://dx.doi.org/10.5755/j01.mech.22.6.13467

Highlights

Manufacturing of components from casting, forging, welding and forming needs machining operation with close tolerance requirement for assembling purposes
The experimental results were discussed based on the machine tool vibration, thrust force and torque, burr dimensions and surface roughness
The experimental machine tool vibration obtained for both TiAlN coated and uncoated carbide drills operated at various spindle speeds and feed rates are shown in Fig. 1, a-d

Summary

Introduction

Manufacturing of components from casting, forging, welding and forming needs machining operation with close tolerance requirement for assembling purposes. Drilling is a machining processes, which is used to make a hole on component face. In view of this drilling is one of the important machining processes and has a considerable economical importance. Because it is usually among final steps in the machining of components [1]. This work concentrates on study about vibration, tool wear and accuracy of machined component. Drilling is a highly demanding machining process due to a) complex tool geometry and b) progressive material failure on the work piece [4]. More over the manufacturing of deep holes with small diameter has to face problems to evacuate chips, this introduces frequent problems like incremental torque, tool failure and poor hole quality [5,6]

Methods

Results

Conclusion