Twist drill is a cutting tool of large-batch and diversified varieties. Geometric measurement is indispensable to drill design, manufacture, and regrinding. To meet the demand of advance in manufacturing technology, a three-dimensional (3-D) drill measurement instrument was developed. Method of drill flank and flute measurement by using this device is presented in this work. Cutting angles evaluation is essential to cutting performance appraisal. But, there is no suitable instrument yet to inspect them directly. If the flank/flute intersection is determined, cutting angles calculation would be a routine work of numerical computation. Considering the peculiarity of the drill point configuration, a straightforward method for flank/flute intersection is derived. Procedure of cutting angles calculation is also detailed. The procedure is illustrated by an example of flank and flute inspection, flank/flute intersection, and cutting angles calculation for a standard twist drill. The measurement precision is appraised by using a tool-room microscopy. The maximum error is in the third decimal place. It verifies the validity of the developed 3-D drill meter and the proposed measurement methods.
[1]
Gregor Müllenheim.
On determining start points for a surface/surface intersection algorithm
,
1991,
Comput. Aided Geom. Des..
[2]
Hideo Kato,et al.
Practical inspection system of drill point geometry by using simple measurement jig and image processing
,
2001
.
[3]
C. Asteasu.
Intersection of arbitrary surfaces
,
1988
.
[4]
Cheng-I Weng,et al.
Analysis of Clearance and Rake Angles Along Cutting Edge for Multifacet Drills (MFD)
,
1994
.
[5]
Robert P. Markot,et al.
Procedural method for evaluating the intersection curves of two parametric surfaces
,
1991,
Comput. Aided Des..
[6]
Hiroyuki Kumehara,et al.
Measurement of drill point geometry by using laser sensor
,
2007
.
[7]
V. Radhakrishnan,et al.
Computer-aided inspection of cutting tool geometry
,
1992
.
[8]
Jun Ni,et al.
Analyses of Drill Flute and Cutting Angles
,
1999
.
[9]
Chandrajit L. Bajaj,et al.
Tracing surface intersections
,
1988,
Comput. Aided Geom. Des..