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How to choose an end mill to improve the efficiency of mold processing
In recent years, with the development of high-speed machining center spindles 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 extend the life of the mold, the hardness of the material to be cut is also on the rise. Therefore, the tool life and processing efficiency in the high-speed machining of high-hardness materials have put forward higher requirements.
Under normal circumstances, we will select the end milling cutter from the following three points:
1. Choose the type of tool coating according to the type and hardness of the workpiece to be processed. For example, when processing carbon steel and other workpieces whose hardness is below HRC40, MIRACLE40 coating from Mitsubishi Materials Corporation can be used. When processing alloy steel S, tool steel and other workpieces with a hardness of about HRC50, MIRACLE coating can be used. When processing workpieces with higher hardness, the tool shape, cemented carbide materials, and coatings are all MIRACLE coatings for high-hardness processing specially used for processing high-hardness materials.
2. Choose the shape of the end mill neck according to the shape of the 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. Long-neck type and tapered-neck type can be deep excavated, the interference angle should be considered when choosing between the two. At the same time, compared with the long neck type, the tapered neck end mill has higher rigidity, which can improve the cutting conditions and achieve better machining accuracy. The tapered end mill should be selected as far as possible.
3. Choose end mills with different ball nose accuracy according to the machining accuracy. The arc accuracy of ball end mills is usually ±10μm, but there are also ±5μm high-precision end mills, which can be used for high-precision machining.