Hard turning gear selection bn h20 grade cbn tools

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Hard turning gear selection BN-H20 grade CBN tools
As a mechanical component of the transmission, the gear is widely
used in various fields. In order to obtain a good service life and
quality, a heat treatment process is often used. The hardness after
heat treatment is HRC28-45, and the traditional carbide tool and
ceramic tool can be solved. This article mainly introduces how to
select cutting tool machining high hardness gears after quenching.
Why is the gear after quenching difficult to machine?
(1) After hardening, the hardness of the gear is generally about
HRC58-62. The traditional cutting tools can't be processed, or the
wear is too fast.
(2) Some gears are intermittent, such as oil holes on the end face or
grooves in the inner hole are all belong to interrupt cutting, the
traditional tool is easy to collapse;
(3) There are a small number of heavy interrupt gears, that is the
machining of the gear tooth surface. Only CBN tools are suitable for
machiningdes).

2. www.halnncbn.com
Halnn Recommended CBN Tools For Hard Turning gears:
For high hardness hardened gears, Halnn recommends BN-H10,
BN-H20, BN-S20 grade CBN tools. The BN-H10 grade CBN tools
is selected for continuous cutting, the BN-H21 grade CBN tools is
selected for semi-interrupted cutting, and the BN-S20 grade CBN
tools is selected for heavy interrupted cutting or large margin cutting.
Among them, the BN-H10 grade and the BN-H20 grade belong to
the welded CBN tools , and only the cutting edge is CBN. The
BN-S20 grade belongs to the solid CBN tools, which is made of
CBN
Application case: Halnn BN-H20 grade CBN tools interrupted
cutting gear

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Halnn BN-H20 grade CBN tools interrupted cutting gear
Processing parts:Gear inner hole
(Semi-interrupted cutting)
Workpiece material: 20CrMoTi
Workpiece hardness: HRC58-62
Tools type: BN-H20 CCGW09T304-2S
Cutting parameters: Rotating speed=1180r/min,
Feed rate(Fr)=0.1mm/r,
Cutting depth(ap)=0.15mm
Processing method: dry cutting
Machining effect: During the processing of the inner hole, the tool exhibits
excellent impact toughness and wear resistance, no chipping phenomenon, and
the accuracy reaches Ra0.8-Ra0.4, and the effect is excellent.