NEWS 2012 - KLINGELNBERG GmbH

NEWS 2012
Issue 3/2012
HÖFLER HOB SHARPENING
WITH RAPID GEAR GRINDING TECHNOLOGY
Regular resharpening of hobs is a decisive factor for the tool life. So far, special machines have been used
for this purpose. As of now HÖFLER customers are also in a position to sharpen and inspect their hobs on
RAPID gear grinding machines. HÖFLER HOB SHARPENING is another advantage of your RAPID for optimized gear grinding processes and is a good example for the perfect interplay of HÖFLER gear hobbing
and grinding machines. With this new option you can save a hob sharpening machine, simplify logistics
and reduce storage costs – another competitive edge in gear processing.
Precondition for this new technology – sharpening and
inspection of hobs on gear grinding machines – is a
RAPID machine of the new generation, which has a
grinding head additionally equipped with the active
swiveling axis [A-axis], the active tangential shift axis
[Z-axis] and a 3-D measuring head.
During hob sharpening the wear marks at the hob
teeth are removed. Here a series of requirements must
be observed, which HÖFLER is fulfilling without any
problems.
■ The cutting face geometry must be restored corresponding to the accuracy class of hob.
■ By the use of a heavy-duty coolant filter and a temperature conditioning device with up to 260 l/min
any thermal impact during the sharpening process
is virtually eliminated.
■ By freely adjustable process values and dressing
parameters the surface roughness of the cutting
face is kept as low as possible what is important
for the accuracy of the hobbing process and the
service life of the hob.
www.hofler.com
NEWS 2012
Issue 3/2012
HÖFLER HOB SHARPENING
IN A SCHEMATIC DIAGRAM
Cutting edge wear
Flank wear
Edge
chipping
Free
surface wear
Crater
Left:
Forms of wear at hob tooth
Right:
Grinding wheel in mesh
A hob generally consists of two tooth systems – a
ing is exclusively carried out by the rotation axis. Feed
worm and cutting flutes. The disruptions of cutting
direction is determined bySchneidkantenthe job data entered.
flutes caused by the worm will be considered during
Finally you can measure profile, lead
and spacing of
(Hohlkegel)
measuring and centering. The positions of a reference
AusFreiflächenthe ground hob by the integrated
inspection
system.
abrundung
Flankenverschleiß
bröckelung
cutting face and with it also of all disruptions are de-
verschleiß
Kolk
tected when centering is started.
All required process data are calculated before machining starts. The grinding wheel geometry is calculated from the workpiece and process data entered
and is correspondingly dressed.
After having touched the cutting surface radial dipping
is started automatically and finds the radial grinding
position.
Centering can be either effected by the inspection system or the grinding wheel. Infeed motion during grind-
HÖFLER HOB SHARPENING can be delivered with or retrofitted to each RAPID of the new machine series.
We will be pleased to demonstrate this option to you in our company. Do not hesitate to contact us.
KLINGELNBERG GmbH
Industriestraße 19
Phone
+49 / 7243 599 - 0
D-76275 Ettlingen
Fax
+49 / 7243 599 - 165
www.hofler.com
E-mail
info@hofler.com