Mar

The case of Dressing Hob Cutter

01. Hob cutter

Work piece	Hob cutter
Material	High speed steel with titanium aluminum nitride coating
Hardness	HRC64-68
Allowance	0.2-0.3mm
Roughness	Ra≤0.2μm
Accuracy	The straightness of single tooth top to tooth root is 0.005mm, the straightness of the whole hob is 0.01mm from left to right, and the teeth in the circular direction are equally divided into 0.1mm
Other	Grinding surface grain consistent, no burn vibration marks

02 Grinding wheel parameters

Grinding wheel	Grinding wheel for dressing Hob cutter
Specification	4C9 150Dx15Tx3.5Wx50H
Bond	Vitrified bond CBN wheels

03 Machine Parameters

Machine	LUREN-LHS-3040
Spindle speed	Spindle speed
Grinding allowance	0.2-0.3mm
Dressing	WA oil stone 220#
Dressing frequency	1-2 piece/times
Feed speed	600-1000mm/min
Dressing time	25-30 min

04 Grinding result

Item	MORE	Top brands in Japan	Note
Specification	4C9 150Dx15Tx3.5Wx50H Vitrified bond wheels	4C9 150Dx15Tx3.5Wx50H Resin bond wheels
Linear speed	54m/s	54m/s	same
Processing time	25min	25min	same
Dressing time	Manual	Manual	same
Dressing frequency	1-2 piece/dressing	1 piece/dressing
Dressing amount	Manual	Manual	same
Roughness Ra≤0.2	0.08-0.1μm	0.1-0.12μm	MORE with better roughness
straightness	0.005mm	0.005mm	same
Life	100 hob cutter	70 hob cutter	MORE with longer life

Through the above cases, we can see that the service life of our grinding wheel increased by 43% compared with the foreign competing grinding wheels under the same processing quality; Production efficiency increased by 5%; the combined cost was reduced by 35%. Our grinding wheels have higher quality and longer service life, which can bring better comprehensive processing cost to customers.

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