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Measuring Cutting Tool Edge With 3-D Profilometer

Noncontact technology measures nanometer detail on cutting edge.

Wed, 01/20/2010 - 05:00
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Measuring the sharp edges of cutting tools is a challenging process, because it involves a small radius, which requires high lateral resolution and high angles. It is also important to be able to measure a diverse range of heights. The study becomes more difficult when the surface has chipping or other types of deformation. Precision cutting tools generally require a sharp tool edge with radii of several tens of nanometers or even smaller.

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There is an endless range of cutting tools and each has a uniquely shaped edge for its cutting purpose. Tools with round cutting edges could be used for machining surface forms and structures while straight cutting edges are typically used for machining grooves.

Importance of surface metrology inspection for quality control

For a particular tool, the edge's precision is expected to meet intended results during use. Because the depth of cut is controlled to the nanometer level, the tool cutting edge profile is an important factor that influences the final quality of a machined surface. Using 3-D profilometer, the edge correctness can be determined to ensure quality control before production and during the life of the tool.

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