Machinability of Copper in Ultra-Precision Micro Diamond Cutting

The influence of cutting edge sharpness on surface finish in facing with round nosed cutting tools

“…2) f 2 /r n is also the value of uncut chip thickness a c * at point A along the cutting edge. a c * is the largest value of uncut chip thickness associated with the edge AB below which the residual work surface is generated [4]. Thus the data in Fig.…”

“…Below the critical value, large increases in specific forces have been measured [2,3]. Changed surface appearances from clean cut to burnished have been reported [4,5]. Experimental and theoretical studies have indicated the critical value of a c /r e to be between 0.1 and 0.5, depending on material machined and cutting conditions [6,7].…”

“…In secondary edge studies, researchers [1,4,[8][9][10][11][12][13][14][15][16], machining ferrous and non-ferrous work materials with carbide, ceramic (PCD and PCBN) and single crystal diamond (SCD) tool inserts, report peak-to-valley roughnesses, e.g. R z , close to kinematic values f 2 / (8r n ) at large feeds, where f is feed, r n is tool nose radius.…”

A method to include plastic anisotropy to orthogonal micromachining of fcc single crystals

“…Lucca developed a sliding indentation model and estimated subsurface damage for aluminum to be 0.31-0.81 μm for cut depths of 0.1-1 μm, respectively, that match with the X-ray measurements [32]. Moriwaki and Okuda [25] observed that, below a 0.2-μm depth of cut, rubbing and burnishing become more dominant than shear and no crystallographic effect is found while machining polycrystal copper.…”

“…Numerous studies on both single and polycrystal metals have elucidated the effect of the crystal orientation of the workpiece on the quality surface machined at small scales [6,7,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Understanding the difference in cutting forces for planning different orientations in the crystals has been a fundamental issue even though orthogonal planning is the simplest deformation case.…”