外文翻译---新工具使新机器设计(编辑修改稿)

外文翻译---新工具使新机器设计(编辑修改稿)内容摘要：

ting performed by OSG Tap and Die, it was discovered that when machining aluminum at very high speeds, the performance of an uncoated coarsegrained carbide tool was superior to that of one coated with TiN, Ti, TiAIN, or ALTiN. This testing does not mean that all tool coatings will reduce the tool performance. The diamond and DLC coatings result in a very smooth chemically inert surface. These coatings have been found to significantly improve tool life when cutting aluminum materials. The diamond coatings were found to be the best performing coatings, but there is a considerable cost related to this type of coating. The DLC coatings provide the best cost for performance value, adding about 20%25%to the total tool cost. But, this coating extends the tool life significantly as pared to an uncoated coarsegrained carbide tool. Geometry The rule of thumb for highspeed aluminum machining tooling designs is to maximize space for chip evacuation. This is because aluminum is a very soft material, and the federate is usually increased which creates more and bigger chips. The Makino MAGSeries aerospace milling machines, such as the MAG4, require an additional consideration for tool geometrytool strength. The MAGSeries machines with their powerful 80hp spindles will snap the tools if they are not designed with sufficient core strength. In general, sharp cutting edges should always be used to avoid aluminum elongation. A sharp cutting edge will create high shearing and also high surface clearance, creating a better surface finish and finish and minimizing chatter or surface vibration. The issue is that it is possible to achieve a sharper cutting edge with the finegrained carbide material than the coarse grained m。