Drilling insert geometry: the art and science of cutting performance

In the world of precision manufacturing, drilling inserts are not only a symbol of technology, but also a perfect combination of craftsmanship and science. With their unique geometry, they play a vital role in complex cutting processes. The geometry of the insert is not only a display of its external characteristics, but also a direct reflection of its cutting performance.

The geometry of the insert is the cornerstone of its cutting performance. It determines the angle, area and distribution of cutting force when the insert contacts the workpiece. Reasonable geometric design can minimize friction and heat generation during cutting, promote the smooth formation and discharge of chips, thereby improving cutting efficiency and processing quality.

The parameters of the insert, such as the edge angle, rake angle, and back angle, are key elements in geometric design. The edge angle determines the sharpness of the cutting edge and affects the generation of cutting force and cutting heat; the rake angle affects the angle at which the cutting edge cuts into the workpiece. The appropriate rake angle can reduce cutting force and reduce cutting temperature; the back angle is related to the contact between the cutting edge and the machined surface. The reasonable back angle can reduce friction and wear and protect the tool from damage.

However, the geometry of the blade is not static, but needs to be adjusted and optimized according to specific processing requirements. Different processing tasks have different requirements for the geometry of the blade.

For example, when processing deep holes, because the chips are difficult to discharge and vibration is easy to occur during the cutting process, a blade with a special internal chip removal structure is required. This blade is cleverly designed to allow the chips to be discharged smoothly along the predetermined path, avoiding blockage and accumulation, thereby ensuring the smooth progress of the cutting process.

When processing precision small holes, the quality and accuracy of the machined surface are extremely high. At this time, it is necessary to select a blade with a sharper cutting edge and a smaller cutting angle. Such a blade can reduce cutting force and vibration, reduce damage to the workpiece, and obtain a more delicate and precise machined surface.

Interaction between geometry and cutting performance
There is a close interactive relationship between the geometry of the blade and the cutting performance. Reasonable geometric design can significantly improve the cutting performance, and the improvement of cutting performance further promotes the optimization and innovation of the geometry.

With the continuous development of the manufacturing industry, the requirements for machining accuracy, efficiency and surface quality are getting higher and higher. In order to meet these requirements, the geometry of drilling inserts is also constantly being improved and innovated. For example, more complex composite geometries are adopted, the arrangement and angle of cutting edges are optimized, etc., to further improve cutting efficiency and processing quality.

The geometry of drilling inserts is the crystallization of the art and science of cutting performance. It not only affects the friction, heat generation and chip formation during the cutting process, but is also directly related to the surface quality, cutting efficiency and tool life of the machined surface. Therefore, when selecting and using drilling inserts, we need to fully understand the characteristics and advantages of their geometry, and make reasonable adjustments and optimizations according to specific processing requirements. Only in this way can we give full play to the potential of drilling inserts and contribute more to the rapid development of the manufacturing industry.