The Effect of Halnn BN-K1 Solid CBN Insert machining pump
Category：News
PublishedDate：2017-10-12
With the rapid development of the modern technology, the needs of industry pump increase. In order to meet the requirements of the pumps, the manufacturers usually use high hardness materials with good performance for industry pump. And the materials have high hardness, good wear resistance, which will improve the tool life.The following will share you the pump components performance and how to machine this type pump parts.
Part 1 The main materials and the performance of the pump components
Because of the bad environment of the working environment for the industry pump,the main materials of the pumps are high hardness and high strength cast iron which contain chromium element. We often called that High Chromium cast iron, such as Cr26.
Part 2 How to choose the cutting tools materials for machining pump components
Because of the different working environment of the pump, and it needs to make sure the performance of high hardness and excellent wear resistance, we usually use high chromium cast iron as the main materials. But it will have some problems on machining this material pumps, such as hardness, casting defects are the main factors.
In current times, there are 3 types cutting tools can be used for machining pump: carbide insert, ceramic cutters and cbn insert. With so many years’ experience on superhard cutting tools, we recommend to use cbn insert.
The manufacturers use carbide insert machine pump parts, but the hardness of the carbide cutting tools are not high, it exists casting defects when machining pump parts with irregular surface, the tools will wear rapid, and the tool cost on each work piece is high. Then they try ceramic cutters, however it is brittle, and only can be used for finishing process and small working allowance.
Above 2 types cutting tools can’t solve the problems on machining slurry pump, so the cutting tools manufacturers begin to research cbn inserts. In early times, cbn insert is only used for fishing process. And later , Halnn researched non-metal adhesive cbn insert BN-K1 make roughing slurry pump come true.
From hardness: Halnn BN-K1 Solid CBN Insert =Traditional cbn insert> Ceramic Cutters> Carbide Insert
From impact resistance: Halnn CBN Insert BN-K1>Traditional CBN Insert>Carbide Insert>Ceramic Cutters
Halnn Superhard, as the predecessor of superhard cutting tools, always devote to researching new cutting tools. And BN-K1 is already used for machining pumps by the customers.
Part 3 The following is one of the application case for machining pump parts with BN-K1 solid cbn insert
Machining Materials: High Chromium Cast Iron Cr26
Hardness: HRC60
Machining Pump: Industry pump body
Insert Grade:BN-K1
Cutting Data:ap=3.5mm, Fr=0.1mm/r,Vc=75m/min
Machining Type: Dry Cutting
Machining Effect: Compared with ceramic cutters, The cutting speed of BN-K1 solid cbn insert is about 2 times of ceramic cutters, the feed rate is 42% of the ceramic cutters, the tool life of BN-K1 solid cbn is 7.5 times of ceramic cutters.
|
Insert Materials |
Cutting Speed(m/min) |
Feed Rate(mm/r) |
Tool Life/blade |
|
BN-K1 |
75 |
0.1 |
85 |
|
Ceramic Cutters |
35 |
0.07 |
10 |
Part 4 Conclusion
With the development of modern technology, more and more pump parts use high chromium cast iron with good wear resistance as the main materials. And the manufacturers only develop new cutting tools materials specific for this type high hardness cast iron materials. Nowadays, CBN Insert BN-K1 is the most suitable cutting tools.