The geometric Angle of the tool

Choosing the appropriate geometric Angle of the graphite tool helps to reduce the vibration of the tool, and in turn, the graphite workpiece is not easy to break; 1. When the negative front Angle is used to process graphite, the tool edge strength is better, and the impact resistance and friction resistance are good. With the decrease of the absolute value of the negative front Angle, the wear area of the back tool face does not change much, but the overall trend is decreasing. When the positive front Angle is used, the tool becomes sharper with the increase of the front Angle, but the tool edge strength is weakened, which leads to the rear tool face wear is intensified. When negative front Angle machining, the cutting resistance is large and the cutting vibration is increased. When using large positive front Angle machining, the tool wear is serious and the cutting vibration is also large. General roughing should choose a small front Angle tool or a negative front Angle tool. 2. The back Angle, if the back Angle increases, the cutting edge strength of the tool decreases, and the wear area of the back tool surface gradually increases. When the back Angle of the tool is too large, the cutting vibration is strengthened. The smaller the back Angle is, the longer the friction contact length between the elastic recovery layer and the back tool face is, which is one of the direct causes of the wear of the cutting edge and the back tool face. In this sense, increasing the back Angle can reduce friction, improve the quality of the machined surface and the service life of the tool. 3. Helix Angle, helix Angle is small, the same cutting edge cut into the graphite workpiece at the same time the longest blade length, cutting resistance is the largest, the tool to withstand the largest cutting impact force, so the tool wear, milling force and cutting vibration are the largest. When the spiral Angle is large, the direction of the milling force deviates from the workpiece surface, and the cutting impact caused by the collapse of the graphite material is intensified, so the tool wear, milling force and cutting vibration are also increased. Therefore, the impact of tool Angle changes on tool wear, milling force and cutting vibration is a combination of front Angle, back Angle and spiral Angle, so we must pay more attention to the selection. Through a large number of scientific tests on the processing characteristics of graphite materials, the PARA tool optimizes the geometric Angle of the relevant tool, so that the overall cutting performance of the tool is greatly improved.