CBN inserts Grade BNK30 high speed turning gray cast iron pa
Category：News
PublishedDate：2017-08-30
Gray cast iron is a type engineering materials which is widely used in many industries. Even though gray cast iron is not difficult to machine, but the hard points, chill layer, sand and other problems in the castings brings so many problems in the process, and make the cutting tools wear fast. In the assembly line processing bulk production, the damage of the insert will lower the processing efficiency, and changing the insert also will affect the surface quality. Because the qty of the casting parts are so large, so improving the efficiency will reduce the processing costs, which will bring more profit for the manufacturer.
The hardness of CBN is only second to diamond insert, and suitable for machining hardened steel materials. And when they machine the gray cast iron parts with high content Pearlite, also get good performance.
We also make testing between brazing pcbn inserts and solid cbn inserts. The following will share you 2 application cases on machining gray cast iron parts. They use same Materials BNK30.
(1) BNK30 Brazing PCBN Insert machining Cast Iron Parts Brake Drum
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BNK30 Brazing PCBN Inserts finish turning Brake Drum |
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Machining Part：Brake Drum |
Machining Materials:FC250 |
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Workpiece Hardness:HB190~220 |
Inserts Grade:BNK30 CNGA120408 |
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Cutting Type:Dry Cutting |
Cutting Parameters: ap=0.15mm,Fr=0.16mm/r,Vc=450m/min |
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Testing Performance |
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Inserts Materials |
Linear Speed(m/min) |
Tool Life/tip |
Costs/workpiece |
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Halnn BNK30 |
450 |
100 |
$0.45 |
|
Sumitomo BN700 |
450 |
100 |
$0.75 |
(2) BNK30 Solid CBN Inserts rough machining Brake Disc
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BNK30 Solid CBN Inserts rough machining Brake Disc |
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Machining Part：Brake Disc |
Machining Materials:FC250 |
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Workpiece Hardness:HB180~240 |
Inserts Grade:BNK30 CNGN120416 |
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Cutting Type: Dry Cutting |
Cutting Parameters: ap=2.5mm,Fr=0.3mm/r,Vc=697m/min |
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Testing Performance |
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Inserts Materials |
Linear Speed(m/min) |
Cutting Depth |
Tool Life/tip |
|
Halnn BNK30 |
697 |
2.5 |
260 |
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Seco CBN300 |
697 |
2.5 |
200 |
From above 2 application case, we can see that when you machining gray cast iron parts, BNK30 can be your right choice, it can be made both brazing and solid type. Both of them can be used for roughing and finishing.