Whole technological solutions for hard cutting rolls with Halnn cbn insert (BN-S20 and BN-K1)

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