一级特黄AAA大片在线观看_国产一级a毛一级a看免费视频_一级a性色生活片久久无少妇一级婬片免费放_特级丰满少妇一级AAAA爱毛片_综合久久午夜无码鲁丝片久久真人一级毛片_完整观看高清秒播国内外精品资源_欧美成人精品欧美一级乱黄_伊人天天久大香线蕉av色_无毒不卡在线观看无需下载_寡妇高潮一级毛片91免费看｀日韩一区二区

Chamfering grain problem from high-ray CNC machine
The knife grain on the chamfer made by the high-ray CNC machine is mainly caused by:
I. High precession requirements of the high-ray CNC machine;
II. Good rigidity of the high-ray CNC machine;
III. Engagement of the cutting edge and feed speed;
IV. Part structure and fixture;
V. The cutting heat is too high and the cutting speed is too low;
VI. Tool and cooling
Tool factors: tool material (the diamond tool is commonly used), tool angle design and knife handle dynamic balance.
Cooling factors: coolant and the existence of high-pressure cooling.