When compared to carbide inserts, full cbn inserts deliver superior cutting performance. In fact, they are easier to press and form. Moreover, they are more economical and can be used for a wide range of applications. Here are a few of their many advantages. Read on to learn more.
CBN is a hard material
CBN is a highly hard material that has numerous performance advantages. Its cubic crystal lattice is similar to that of diamond and makes it perfect for applications requiring extreme wear resistance and toughness. In addition to being extremely hard, CBN is also inexpensive per part.
CBN is a crystalline material that is formed from a mixture of Boron and Nitrogen. It has a hardness of more than 7000HV and is a good candidate for high-speed machining. It also has good thermal conductivity, making it the perfect material for cutting tools.
It has better cutting performance than carbide
In this study, two CBN inserts were compared side by side in terms of chip removal rate and tip wear. The CBN insert exhibited better chip removal rate and wore half as much as the carbide insert after 45 minutes. Nevertheless, the carbide insert needed indexing to maintain chip control. On the other hand, the CBN insert continued to produce short, tightly curled chips. Moreover, a binderless CBN insert with a medium rake angle had better performance. In fact, the binderless CBN insert wore half as much as the carbide, left half as much material, and consistently performed twice as fast.
When choosing a CBN insert, the cutting parameters should be carefully chosen. For example, when cutting cast iron, the speed should be about 1,000 to 2,000 SFPM. For aluminum, the speed can go up to 4,000 SFPM. In a 14-inch cutter plate, this translates into 900 to 2,000 rpm.
It is easy to machine
CBN inserts are a great choice for the most difficult steel applications. They are a cost-effective solution for steels with a hardness of 50-55 HRC and are easy to machine. They also are able to resist heat, abrasion, and mechanical shock. CBN inserts are available in different shapes, sizes, and thicknesses.
They are also easy to maintain. A CBN insert has an extended life, outlasting its carbide counterparts by more than 2000 times. These inserts can also be machined at very low feed rates in hard steel. The rigidity of the workpiece and tool assembly are crucial to high-speed machining. Many boring heads have counterweights to ensure that the cutter remains balanced.
It requires a light hone
A CBN insert’s edge prep will determine its performance, and there are a number of factors to consider. Light honed CBNs have an edge that has been chamfered or lightly honed. Both styles produce good surface integrity and enhanced process performance. The LS style is ideal for light duty applications, while the E style provides the best performance under low cutting forces.
Summary:
When honed, CBN inserts are harder and require less time to index. This means less time is required to replace the inserts, which increases machine utilization and throughput. CBN inserts are expensive, but can be justified when used in high volume manufacturing.
