Shenzhen EMAR Precision Technology Co., Ltd. specializes in CNC core machining. Users often find that the service life of drill bits is often affected by external factors during deep hole machining. In this article, we mainly list the factors that affect the service life of CNC core machining drill bits, including:

(1) The performance of workpiece materials: Quasi dry drilling is more sensitive to the differential changes in workpiece materials. During the CNC Machining process, different material properties can affect the durability of cutting tools.

(2) Manufacturing errors of drill bits: The correct shape of the drill tip and the optimal physical properties of the cutting tool material have a significant impact on the cutting performance of the drill bit.

(3) Good grinding of the transverse edge of the drill bit and the addition of oil mist grooves on the rear cutting surface can significantly improve productivity and achieve the best use effect.

(4) The influence of high-speed walking machine: When the feed rate of the walking machine remains constant, the cutting force is lower at higher speeds. Without using cutting fluid, the drilling efficiency can be improved.

(5) Deviation of drill tip: The slight deviation of the drill tip caused by the jumping of the drill bit or spindle after clamping. If the offset is large enough before processing, it will cause hole displacement and reduce the service life of the drill bit. To avoid hole displacement, guide holes are usually used, which will increase the service life of the drill bit.

(6) The influence of compressed air: The increase in oil mist pressure during CNC drilling has a positive effect on obtaining good lubrication for the drill tip.

(7) Raw materials: The physical properties of castings from different batches vary significantly, which greatly affects the efficiency of drilling production. Despite taking some control measures, additional stress and deformation may occur when the drill bit encounters holes, inclusions, and hardness changes. In addition, the walking machine has relatively high requirements for the outer diameter and straightness of the raw materials. Therefore, the consistency between the quality of the raw materials and the interior of the materials is the foundation for efficient machining of the drill bit.

(8) Coating of cutting tools: The use of coated drill bits during quasi dry machining is an effective means of achieving high productivity. In contrast, uncoated drill bits have a relatively shorter lifespan. A better coating is a physical coating, while diamond-like coatings are only used in front of drill tips and cutting tools, rather than as a whole coating. The performance of drill bits coated with local PVD diamond is excellent. In castings and aluminum alloy materials, the damage of drill bits is mostly caused by abnormal wear and tear, and in some cases, it is also caused by bonding.