Drilling tool inserts play a crucial role in the process of chip evacuation during drilling operations. Chip evacuation refers to the removal of metal chips that are produced during the drilling process. Efficient chip evacuation is important as it helps prevent chips from becoming lodged in the hole, which can lead to VBMT Insert tool breakage, poor surface finish, and decreased tool life. The design and material of the drilling tool inserts significantly influence chip evacuation.
The geometry of the drilling tool insert, particularly the shape and size of the cutting edge, plays a key role in chip evacuation. Inserts with sharp cutting edges are more effective at breaking the chips into smaller pieces, making it easier for them to be evacuated from the hole. Additionally, the rake angle of the cutting edge can also impact chip formation SEHT Insert and evacuation. Inserts with positive rake angles typically produce shorter, more manageable chips that are easier to evacuate.
Another important factor in chip evacuation is the material of the drilling tool inserts. Inserts made from materials with good chip control properties, such as carbide or cermet, are more effective at breaking and evacuating chips. These materials are also more resistant to built-up edge formation, which can hinder chip evacuation. Additionally, the coating on the inserts can also impact chip evacuation. Coatings such as TiN or TiAlN can help reduce friction and aid in the smooth evacuation of chips.
Proper chip evacuation is essential for achieving high-quality drilling results and maximizing tool life. By selecting the right drilling tool inserts with the appropriate geometry and material, manufacturers can ensure efficient chip evacuation and improve the overall performance of their drilling operations.