Rough cutting Gray Cast Iron Brake Drum / Disc with Halnn Tools CBN Tip

Rough cutting Gray Cast Iron Brake Drum / Disc with Halnn Tools CBN Tip

 
1. Halnn Tools CBN Tips High speed Machining Grey Cast Iron Brake Drum
 

In previous times, people adopt common lathe and carbide insert to machine brake

disc, the process is roughing-semi-finishing-finishing. With the improved requirement on the surface quality and the production qty, they change the common lathe to CNC Lathe, but the carbide insert can’t machine with high cutting speed, they also can’t improve the efficiency, so they will choose other insert materials to satisfy the CNC lathe. CBN Insert became their right choice.

 
2. Why we Choose Halnn Tools CBN Tips High speed Machining Grey Cast Iron Brake Drum

Gray cast iron has low hardness and can be processed by traditional carbide tools. But why choose a CBN inserts that is more expensive than traditional carbide tools?

Gray cast iron material is mainly used in machine tools, automobiles and other industries. Most of the parts are mass-produced, which requires high production efficiency. Although traditional carbide tools can also process gray cast iron, the processing efficiency is low and only suitable for small batch production. , or occasionally processing gray cast iron parts.

 
3.CBN Tip Characteristics

5.Detailed Data of WNGA CBN Tip

 

Type	Dimension					Standard Chamfer	Grades
	L(mm)	φI.C(mm)	φd(mm)	S(mm)	r(mm)		BNK30	BN-S300	BN-S20	BN-S200
WNGA080404	8.7	12.7	5.16	4.76	0.4	S01015 S01020 S02020 S02025	●	●	●	●
WNGA080408	8.7	12.7	5.16	4.76	0.8		●	●	●	●
WNGA080412	8.7	12.7	5.16	4.76	1.2		●	●	●	●

 

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6.Application Case
 

As shown in the figure, the processing effect of Halnn solid CBN inserts---BN-S300 CBN grade finishing gray cast iron brake disc end face.

 

Machining workpiece: brake disc

Processing: Finishing

Processing part: end face (brake surface)

Tool number: BN-S300 SCGN090408

Machining method: double CBN inserts processing end face at the same time

Cutting parameters: Cutting depth (ap)=0.25mm,

Feed rate(Fr)=0.2mm/r,

Cutting speed(Vc)=800m/min

Processing method: dry cutting

 

Processing effect: compared with coated carbide inserts, the results are as follows

 

Tool material	Inserts type	Line speed	Single edge life
Halnn BN-S300 CBN grade inserts	SCGN090408	800m/min	300pcs/edge
coated carbide inserts	CNMG120408	300m/min	15pcs/edge

 

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