Halnn Superhard Materials Co,Ltd
The whole Solutions on machining rolls with CBN Insert In the past, both rough machining and finish turning rolls need grinding process, while it has low efficiency and the cutting fluid will bring pollutions, and affect the health of the operator. So In modern times, hard cutting tools become featured products on hard turning hardened steel rolls and are already widely used, the processing efficiency already improved 5~10 times, which will avoid the pollutions and lower the production costs.
This article will help you analysis all the details on the whole solutions of machining rolls. Part 1 The choice of the tool holder for machining rolls
For large scale rolls, we usually use heavy duty mill rolls, and the tool holder often is 40*40, and the holder angle can be 45degree or radius tool holder.
For some small rolls, we usually use 25*25 and 32*32 tools holder, and the choice of the angle can be decided by the length diameter ratio, the long rolls, we can choose 90 degree and 75 degree tool holder, the short one, we can choose 45 degree or radius tool holder.
Part 2 The Rolls Materials and corresponding hardness Materials
Hardness
Materials
Hardness
High Ni-Cr Rolls
HSD76~82
Graphite Semi-steel roll
HSD62~68
Hi-Cr Cast Iron Rolls
HSD72~78
Alloy Cast Iron Rolls
HSD65~70
Hi-Cr Cast Steel Rolls
HSD68~75
Chilled Cast Iron Rolls
HSD55~62
Semi-Steel Rolls
HSD60~68
HSS Rolls
HSD82~90
Hi-Carbon Semi-Steel Rolls
HSD65~72
Forged Steel Chilled Rolls
HSD92~105
Part 3 CBN Insert Grades specific for different Materials Rolls and the cutting data for reference Machining Materials
Cast Iron Rolls
Cast Steel Rolls
Recommend Cutting Parameters Hardness
Cutting Speed
Machining
Cutting Depth
Feed Rate
Insert
Vc (m/min)
Type
ap (mm)
Fr(mm/r)
Grade
35~120
Roughing
1~10
0.15~0.7
60~180
Finishing
≤1
0.05~0.35
50~150
Roughing
1~10
0.15~0.7
60~250
Finishing
≤1
0.05~0.35
HRC35~68
BN-S20
When using BN-K1 Solid CBN Inserts machining cast iron rolls, we usually use the following models: RNMN200800, RNUN200800, RNMN150700, RNUN160800, RNUN150716, RNMN150716.
2.
BN-K1
≥HRC45
Part 4 The CBN Insert Models Choice 1.
CBN
When using BN-S20 Solid CBN Inserts machining cast steel rolls, we www.halnncbn.com
Halnn Superhard Materials Co,Ltd usually
use
these
models
cbn
insert
SNMN120712,
SNMN120412, SNMN120408, RNMN120400. Part 4 Application Case from our Poland customers The base information: Our customers use common lathe before, and they found that the efficiency is low, and would like to purchase new CNC Lathe, so they will also need the new cutting tools which can achieve high cutting speed. They begin to make market research before purchase the CNC Lathe, Halnn stand out from all competitors just because of the best service. We offer whole solutions to our customers, and offer the after-sale service. They use carbide insert before, so they proposed using cbn inserts, however they didn’t try cbn inserts before, so Halnn help them choose the holder, hard cutting tools and the cutting data for reference, the details as follows: Machining Materials: hilled Cast Iron and High Ni-Cr hard cast iron Machining Type: Roughing, Finishing and Grooving Halnn CBN Insert Grade: BN-K1 Insert Model: RNMN090400S02020，RCMX090700S10020，RCMN090700S02020 Corresponding Tool Holder: CRDNN2525M090400，CRDCN2525M090700，CRDCN2525M090700Y Finally, they achieve good efficiency, and we have bulit long cooperation relationship. If you also have problems on machining rolls, please feel free to contact with us halnntools@gmail.com, Whatsapp:+8618695866134
www.halnncbn.com