Question

how is rake angle can be measured in the drilling tool

Answer 1

Rake angle is a parameter used in various cutting and machining processes, describing the angle of the cutting face relative to the work. There are two rake angles, namely the back rake angle and side rake angle, both of which help to guide chip flow.

In a drilling tool, the cutting edge is measured to determine the rake angle.

The 3D coordinates of the points on the cutting edge are first inspected by using 2D measurement apparatus. Then, the flute profile is deduced from the data measured, and the rake angles are evaluated by numerical computation.

Calculation of Rake angle is based on a series of plane definitions and laborious work in plane projection. This is calculated by using a vector-based procedure. The cutting edge of a standard drill is measured by using a tool microscope and image-based instruments. In each case, the normal rake angle distribution is determined.