With the development of cbn insert, many manufacturers know about cbn insert ,but they don’t know the machining application industry and how to choose.
Even though CBN insert is the most suitable cutting tools materials which used for machining ferrous metal industry in current times, but it is not suit for all the ferrous materials. CBN insert specific to high hardness materials and high speed cutting field, only used the most suitable materials, it can help the customers improve the working efficiency and lower processing cost.
The engineers from Halnn will share you the performance requirement of cbn insert and how to choose the cbn insert.
The selections of the cutting tools
1. For the work piece which hardness below HRC45, it better choose carbide cutting tools .
2. For the work piece which hardness is between HRC45 and HRC55,it is better choose ceramic cutting tools and cbn insert, and you can choose more suitable cutting tools depending on the practical situations.
3. For the work piece which hardness above HRC60,Halnn recommend CBN insert.
There are 3 kinds cutting tools ,which include carbide alloy insert ,ceramic insert ,cbn insert and diamond insert.
Depending on the hardness of machining materials, CBN insert＞Ceramic insert＞Carbide alloy insert. CBN insert and ceramic insert are better used for high speed machining. And if the cutting speed is low, it will be not fit for cbn insert.
The application field of CBN insert
CBN insert are mainly used for high hardness materials and difficult to machining materials, such as high hardness cast iron/cast steel, high hardness steel after heat-treating ,gray cast iron, ductile cast iron, powder alloy,high temperature alloy, ect.
CBN insert include Welded cbn insert and solid cbn insert. Welded cbn insert is first researched by some Europe countries, and mainly used for finishing process, small working allowance can make sure high surface roughness, but cannot use interrupted situation. Solid CBN insert is researched by China, it can large allowance cutting and interrupted turning high hardness work piece. And with the development of the technology ,China already researched welded cbn insert which realized semi-interrupted turning. For example ,Halnn superhard BN-H21 CBN insert ,it not only make sure not chipping ,but also has well wear resistance, and received the recognition by many manufacturers.
Why cbn insert can help customers improve working efficiency and lower processing cost ?
CBN insert can be used for high speed machining, one of the purpose for high speed machining is for improving the working efficiency and then lower the processing cost.
And high speed machining mainly used for finishing process,such as hardened steel gear, bearing and mold tool field .
Following will show you the application case as follows:
Halnn BN-H21 CBN insert interrupted turning gear surface
Diameters of the work piece:167mm,
Machining Materials:20CrMnTi,
Hardness is HRC57~61(after quenching)
Insert grade:BN-H21 WNGA080404-3S(3 tips)
Cutting Parameters:Vc=157m/min,ap-0.3mm,Fr=0.1mm/r,
Machining time for each gear is 60s,and one cutting edge can machining 200 piece .
So for current cutting tools materials ,cbn insert can realize high speed cutting ,and it is more suitable for green machining purpose. So more and more manufacturers use cbn insert to improve efficiency and lower the processing cost.
Any questions on hard turning high hardness materials,please contact with us :info@halnntools.com .