What is helical milling process
As a new type of hole machining method, helical hole milling technology has the advantages of stable cutting process, low cutting force on the tool, and one-time machining can meet the accuracy requirements. This technology has become one of the hotspots and difficulties in material processing research at home and abroad.
Compared with traditional drilling, helical milling uses a completely different machining method. The process of helical hole milling is composed of two movements, the "rotation" of the main shaft and the "revolution" of the main shaft around the center of the hole. This special movement method determines the advantages of helical hole milling.
First of all, the trajectory of the tool center is a helix instead of a straight line, that is, the tool center no longer coincides with the center of the machined hole, which is an eccentric machining process. The diameter of the tool is not the same as the diameter of the hole, which breaks through the limitation of one tool to process the same diameter hole in the traditional drilling technology, and realizes a single diameter tool to process a series of diameter holes. This not only improves the processing efficiency, but also greatly reduces the number and types of tools stored, and reduces the processing cost.
Secondly, the helical hole milling process is an intermittent milling process, which is conducive to the heat dissipation of the tool, thereby reducing the risk of tool wear and failure due to temperature accumulation. More importantly, compared with traditional drilling, the spiral milling process has greatly improved the use of coolant. The entire milling process can be cooled by micro-lubrication or even air cooling, which is a green and environmentally friendly process. .
Third, the eccentric machining method allows enough space for chips to be discharged from the hole groove, and the chip removal method is no longer the main factor affecting the hole quality. It can be seen that this technology has broad development space and good market prospects, but as a new processing method, its processing mechanism needs further research and discussion.
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