The selection for corner radius of cutting edge about CBN insertsManufacturer for CBN PCD carbide inserts tools ceramics tools Mintek Abrasives & T

Technical Info

The selection for corner radius of cutting edge about CBN inserts

By: admin
Oct 24, 2023
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1：All kinds of cutting edges is the most difficult part of the working conditions. The strength of edge is poor, cooling condition is bad, the cutting force and cutting heat are more concentrated, and the cutting speed of edge is the highest place when machining, it is easy to wear off, therefore, the durability of the inserts depends on the wear condition of edge directly.

2：Edge affect the machining surface formation and the height of the residual area directly. That is to say, the edge has direct influence on the roughness of machined surface. Due to the above reasons, when choosing appropriate shape of edge and parameters, considering the tool life and surface quality required based on specific processing conditions. Corner radius is the main parameter of the shape of inserts, which directly affects the surface roughness, the shape of cutting layer, the cutting temperature and tool life.

The selection for corner radius of edge	Advantage	Disadvantage
Big corner radius	Excellent strength of cutting edge, Suitable for rough cutting, Heat dissipation of cutting edge is good,the tool life is long, Could improve surface roughness Ra under the condition of constant cutting parameters.	Radial force is large when cutting. Request the machine have enough good rigidity.
Small corner radius	Suitable for small cutting deep processing or ultra-precision machining, The radial cutting force is small when machining the slender shaft.	The strength of cutting edge and shock-resistance is weak . Heat dissipation of cutting edge is not good. Request change cutting parameters to improve surface roughness Ra.

The selection for Cutting edge

The selection for cutting edge of CBN inserts is very important for improving tool life and reducing breaking due to the high hardness, high brittleness and low strength of edge.

Code	Mode of cutting edge	selection
F	Sharp	Suitable for the machine with good rigidity, the finishing of continuous cutting.
E	Honing	Could enhance the edge and improve tool durability, Suitable for the finishing of continuous cutting.
T	Negative land	The higher strength of cutting edge, according to the different chamferring, suitable for finishing, semi-finishing, rough cutting of continuous machining.
S	Negative land+Honing	The higher strength of cutting edge, according to the different chamferring, suitable for finishing, semi-finishing, rough cutting of interrupted machining.