2-4 flutes solid carbide end mill cutting tools for aluminum - changzhou weitefu tools co.,ltd.
(1) For the front angle, when the graphite is processed with the negative front angle, the cutting edge strength is better, and the impact and friction resistance are better. With the decrease of the absolute value of the negative front angle, the wear area of the back cutting edge has little change, but the overall trend is decreasing. When the graphite is processed with the positive front angle, the cutting edge strength of the cutting tool is weakened with the increase of the front angle, and the wear of the back cutting edge is intensified. When machining with negative rake angle, the cutting resistance is large and the cutting vibration is large. When machining with large positive rake angle, the tool wear is serious and the cutting vibration is large.
(2) If the back angle is larger, the cutting edge strength will be reduced and the wear area of the back face will be larger. When the back angle of the tool is too large, the cutting vibration is strengthened.
(3) When the helix angle and helix angle are small, the cutting edge of all cutting edges cutting into graphite workpiece at the same time has the longest edge length, the largest cutting resistance, and the largest cutting impact force, so the tool wear, milling force and cutting vibration are the largest. When the helix angle is larger, the direction of milling opening force deviates from the general situation of the workpiece to a great extent, and the cutting impact of graphite materials due to crushing is intensified, so the tool wear, milling force and cutting vibration are also increased.
The cutting tool material is the basic factor to determine the cutting performance, which has a great influence on the machining compliance, machining quality, machining cost and tool durability. The harder the tool material is, the better its wear resistance, the higher the hardness, the lower the impact toughness and the more brittle the material is. Hardness and toughness are a pair of contradictions, which should be overcome by tool materials. For tungsten steel cutting tools, the common TiAlN coating can select the ones with better toughness, that is, the ones with higher cobalt exposure; for diamond coated graphite cutting tools, the ones with better hardness, that is, the ones with lower cobalt exposure;
