Damage Evaluation for Cutting Tool (Tip) Edge by Micro Compression Testing Machine

Introduction

It is said that the edges of cutting tools are damaged or impaired by mechanical action (e.g. impact or abrasion caused by scratching by hard particles) or thermo-chemical action (e.g. abrasion caused by adhesion, diffusion or corrosion, fracturing caused by softening or melting of the cutting edge, thermal fatigue, and thermal cracking). The development of even stronger cutting edges is being promoted to adapt to diversifying workpieces, and there is a need for a means for quantitatively measuring the strength of cutting edges to prove their strength. As a proposed means for evaluating strength, a compression test was performed in the vicinity of the edge to measure the relationship between breaking strength and test force/displacement. The following introduces an example of this.

October 22, 2010 GMT