Design and Fabrication of Multi – Purpose 3-Axis Vise for Re-Sharpening of Twist Drill and Light Milling Work
Drilling is a very common machining process being widely used since long to originate straight cylindrical holes by using cutting tools. Often drills are used to produce taper holes and to enlarge or finish existing holes. The cutting tool used for this purpose is called drill bit. During the course of drilling operation, the tool wear takes place and it is very essential to maintain the geometry of tool within the standard limits. It is very important that drills are properly ground. The drill point must be in the center of rotation of the drill. The lips should be of equal length and at correct angle with the axis. Keywords - Twist Drill Bit, Grinding, Included Angle, Lip Clearance Angle and Fabrication.