2013年7月30日星期二

diamond tool wear

Diamond tool wear mechanism is more complex, can be divided into macro-and micro-abrasion wear, the  diamond cup grinding wheel  former mainly mechanical wear, which is dominated by thermal chemical wear. Diamond grinding tool breakage common form for the former flank wear, flank wear and edge chipping. In single crystal diamond tool sharpening process, requires the wear to the grinding tool to meet the requirements, but if the wear generated may damage not have a good grinding before the  polishing pads  flank. The edge cracking (i.e. chipping) is on the edge of the local stress exceeds the capacity of the  diamond grinding wheel diamond cutting tool occurs, generally the diamond crystal (111) cleavage plane of the micro-damage caused. In the ultra-precision machining, diamond tool edge radius of the cutting edge is relatively small, which itself is hard and brittle materials, and because of its anisotropy and (111) surfaces prone to cleavage, with the vibration of the tool blade and grinding wheel grit the mouth of the impact of the role, it is often accompanied produce chipping.

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