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KL-TECH s.r.o. | www.klte.cz
Optimization
of knurling
The knurling quality and the tool life can be improved substantially by optimising the knurling by changing the
rough-turn diameter and / or the pitch.
The following procedure ensures systematic
optimisation: Summary:
„ „ C
 orrection of the rough-turn diameter until optimal knurling
is achieved. „ „ Clear, distinct knurling profile
„ „ Fully formed teeth
„ „ No double knurling / no incomplete knurling
Customer requirements:
Note:
Changing the rough-turn diameter by only a few hundredths of
a millimetre has a substantial effect on the circumference {factor π
(x 3.14...)} and can improve the knurling quality significantly.
If a correction is not possible (tolerances cannot be maintained;
workpiece diameter should not be turned), then:
Solutions:
1) Optimisation measures by user:
„ „ Correction of the rough-turn diameter
„ „ Change of the pitch
„ „ Check whether the pitch can be changed.
If it is not possible to change the pitch, it is necessary to manufacture
a special knurling wheel with optimised pitch (defined number of
teeth / outer diameter of knurling wheel).
Consultation is provided by the Hommel+Keller application engineer on
the basis of a workpiece drawing and information about the machine.
2) Optimisation measures by Hommel+Keller:
„ „ Optimisation by manufacturing a special knurling wheel:
„ „ Calculation of the number of teeth allows development of a knurling
wheel that is specially designed for the application based on the
optimal relationship between the diameter and the number of teeth.
The calculation of the optimal pitch is conducted on the basis of
approximate formulas. Due to inf luencing factors (such as differences
in materials) further optimisation may be necessary.
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