Hard turning process and cbn insert

Hard turning process and the most suitable cutting tools---cbn insert Hard turning Process and the most suitable cutting tools---CBN insert Hard turning process usually was definited the work piece which hardness is above HRC45,the hardness of the typical parts will range between HRC58~HRC68.Hard turning can be used for many industries:Automotive,bearing,mold tool,machine and aerospace ect. There are also many materials can use hard turning,such as bearing steel ,gear steel ,surfacing hardened steel,Nickel-based alloys,ect.In current times ,quenching steel and Carburizing steel also begin to be used for hard turning.

Hard turning can replace grinding in some processing(like machining cylinder,end surface ect) ,not only save the processing time ,but also save the processing costs.And it also obtain excellent roughness which can be below Ra0.4.So there are more and more manufacturers interested in hard turning process instead of grinding.

Hard turning insert can realize “Turning instead of grinding�CBN insert can be used for hard turning instead of grinding,thus it will save the processing cost and the processing time ,so that improve the economic profit.

The key of hard turning process is the choice of the cutting tools.Many customers want to try hard turning ,but they didn’t know how to choose the most suitable cbn insert ,so they will waste much time in the processing.

Halnn will share you how to choose the CBN insert There are 3 kinds materials which can be used for hard turning: Cubic Boron Nitride(CBN),Ceramic and Carbide Alloy.The cutting tools choice need match with the processing efficiency and the processing costs.

1.For the work piece which need required strictly on the dimension and roughness,we need first to choose cubic boron nitride(CBN) insert.

2.For the work piece which tolerance is above 0.05mm,ceramic insert will be better choice.

3.For common workpiece without special requirement ,you can choose carbide insert.

With the development of the technology,cbn insert has more and more application industry.And manufacturers can choose different content cbn to machining different materials work piece.

For example,when interrupted turning gear,you need choose high content cbn insert,such as BN-S20 Solid CBN insert.Because BN-S20 CBN insert belongs to solid cbn insert,which has excellent chipping resistance and fracture resistance in a high temperature.And solid CBN insert also will have a good lifetime than common cbn insert.

But because of high price of solid CBN insert ,many manufacturers will consider welder cbn insert used for hard turning

Hard turning process and the most suitable cutting tools---cbn insert cbn insert or PCBN insert.Now China CBN insert manufacturer already researched other PCBN and soldering CBN insert ,such as BN-H20(soldering cbn insert),BN-H10 PCBN insert. They are mainly used for hard turning hardened steel with finishing process.

Application Case as follows: Machining PartďźšRolling Round Thread Machining Materials:Cr12MoV alloy tool steel Workpiece Hardness:HRC59 Inserts Grade:BN-H20 TNGA160404 Cutting Type:Dry Cutting Cutting Parameters:ap=0.2mm,Fr=0.08mm/r,Vc=70m/min Inserts Materials Linear Speed(m/min) Lifetime/cutting dege BN-H20 Carbide alloy inserts

Failure mode

70

30

Normal wear

26.2

1

Chipping

Wet or Dry cutting for Hard turning Hard turning usually use dry cutting ,and the temperature of insert tip wil be very high,if use cbn insert ,most heat can be taken away by the cutting chips.So CBN insert will be the most suitable cbn insert.

Even though many manufacturers already begin to try hard turning technology,but choose the most suitable insert also very little,so Halnn superhard,as professional manufacturers of CBN insert,will spare no effect to help these manufacturers save their cost and improve the processing efficiency with the environmental cbn insert.

cbn insert used for hard turning