In recent years, with the high speed of the machining center spindle and the development of hot-sleeve tool technology, high-speed machining of high-hardness materials is gradually becoming the mainstream. At the same time, in order to prolong the life of the mold, the hardness of the material to be cut also has an upward trend, so higher requirements are placed on the tool life and processing efficiency in high-speed machining of high-hardness materials.
In general, we will select the end mill from the following three points:
1. Select the type of tool coating according to the type and hardness of the machined workpiece. For processing workpieces with hardness below HRC40, such as carbon steel, MIRACLE40 coating from Mitsubishi Materials Corporation can be used. When processing alloy steel S, tool steel and other workpieces with hardness of about HRC50, MIRACLE coating can be used. In the processing of workpieces with higher hardness, the tool shape, carbide material and coating can be selected for high hardness processing MIRACLE coating for high hardness materials.
2. Select the shape of the end mill neck according to the shape of the machined workpiece. The neck shape of the ball end mill is divided into standard type, long neck type and tapered neck type, which can be selected according to the processing depth and shape of the workpiece. The long neck type and the tapered neck type can be deep-drilled, and the interference angle should be considered when selecting between the two. At the same time, compared with the long neck type, the tapered neck end mill has high rigidity, can improve the cutting conditions, and achieve better machining accuracy. The tapered neck end mill should be selected as much as possible.
3. Select end mills with different ball head precision according to machining accuracy. Ball end mills typically have a circular arc accuracy of ±10 μm, but there are also ±5 μm high-precision end mills that can be used for high-precision machining.
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Label: How to choose end mill to improve the efficiency of mold processing
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