Aluminum cutting knife Stainless steel cutting knife

A cutting tool can have one or more cutting edges. Tools with a single cutting edge are commonly used in turning operations , forming operations , planing and similar operations . This knife removes material from the part with a cutting edge. Tools such as drills and mills are often multi-blade cutting tools. Grinding tools are also a case of multiple cutting edges (multipoint cutting). Each grain of material on the grinding wheel functions as a micro-cutting point.

The cutting tool must be made of a material harder than the material being cut and the tool must withstand the heat generated during metal cutting. In addition, the tool must have a specific geometry, with an angle designed so that the cutting edge can contact the workpiece without causing the rest of the tool to collide with the finished machined surface. The angle of the cut is also important, as is the width, number of teeth and blade size... a lot of factors go into making a knife. But in general, a knife needs to meet the following factors:

+ Hardness: must be hard enough to not be deformed during cutting
+ Mechanical strength: is the ability to not be destroyed when subjected to great pressure during cutting
+ Thermal stability: heat generated during the cutting process. The cutting process is quite large, which can reduce the mechanical properties of the tool
. + Abrasion resistance: because the friction in the cutting process is extremely large.

Knife making materials

Carbide pieces used to attach to the handle

Cutting tools are usually made from the following materials:

+ Wind
steel + Carbon Tool
Steel + Alloy Tool Steel
+ Hard Alloy
+ Ceramic
+ Super Hard Material (CTM)
+ Artificial Diamond (usually used for drilling)

Note: A knife that includes the tail part does not participate in the metal cutting process and the cutting edge is directly involved in the cutting process, so the cutting edge will always be the part that is worn on the cutting edge. knife . So there are knives that people divide these two parts separately, especially knives with many blades participating in the cutting process, when the cutting edge shows signs of wear, people will remove them and replace one blade. new cut. For example, end mills consist of a steel shank and a cutting edge that can be fitted with carbide pieces. Or the drill using a diamond drill is similar.