HONING
DIVISION
■
HONING
GEAR
BORES
HONING SPEED GEARS - PLAIN BORES
For
many
years
the
finish and size, has been an accepted
production
gear bores
to
the
The
operation and in
However, wi
operator is
content
Production
extremely successful
approach
even
The accepted practice
TURN BLANKS AND
REAM BORES ON
AU
TOMATICS
.
honing
quantities are high.
prior
to
the
manufacturing
manufacture
no
of
gears has always required accurate
the
past, this has involved a large
th
the
introduction
longer necessary. In fact,
is virtually eliminated.
lines
which
to
production
when
close tolerances are repeatedly required.
HONE B
ORES
ESTABLISH
ACCURATE SI
AND
GEOMETRY
FOR
LOCATION
PURPOSES
of
the
gear bores in
production
More
recently, 'Green
cutting
of
the
teeth, has
process, and results in a
of
honing
into
whe
include Green and Hard
with
particular savings in
in
the
form
of
fully
automatic
for
economically
TO
ZE
producing
LOCATE FROM
HONED BORE
CUTTING THE TEETH
AND
ALL
OPERATIONS UP TO
HEAT TREATM ENT.
the
hard
method
proved
higher
content
the
manufacturing
re
fully
automatic
hon
ing
production
high
FOR
OTHER
condition
, especially
Honing'
(honing
extremely
standard
of
machining
of
skilled l
installations
in the
manufacturing
costs.
installations,
quality
gears is as
HEAT TREATMENT
PROCESS .
to
obtain
in
the
the
automobile
in
the
successful,
finished
gear
methods
abour.
process, the
are
Honing
which
has
give
follows:
final
soft
condition)
since
.
to
ensure
need
uti
lised,
process,
provided a more
high
.....,
___
geometry,
industry
it
offers
true
for a skilled
the
have
output
-
HONE
BORE SIZE
REQUIRED
FINI
GEOMETRY.
surface
where
of
the
advantages
running
in
labour
proved
positive
capabi l
TO
SH
FINAL
TO
SURFACE
AND
ity
Green
The essential feature
which
to
bore centre line . Since the bore is the major bearing surface in operati
throughout
Many
of
the problems
Honing
locate all the
the
production
(Soft condition)
of
this operation in the production
other
metal
cutting
process.
which
were previously encountered
operations, ensuring
of
gears is
on
that
it
that
the
on
cutting the
provid
teeth
it
is logical
teeth
and a considerable reduction in the scrap rate has been achieved, due entirely
honing
into
the
manufacturing process.
es an
are
have
to
Operational
Comp
Bo
re
diam
Bore le
Mat
erial EN352 Soft
Stock r
Surf
ace finish 1,0
Tolerance:
Di
ameter
Roundness 0,0025 mm
Taper 0,0025
Pr
oducti
accurate
cut
with
to
use
almost
the
inclusi
Details
onent
eter 40 mm
ngth
emo
val 0,05/ 0, 10
on
rate 72
reference
this
as a
been
on
of green
bore
(Green
Sp
eed Gear
35
mm
/2,2
5
µm
0,0075
mm
mm
part
s per hour
from
to
the
location
eliminated
Steel
mm
Hon
Ra
e)
Hard Honing
Th
e overall
carried
in
varying
One
of
producing
allow the hard
relationship
Due
to
two
honing
and the
improvement
through
the
the
second
the
amounts
basic principles
an ac
curate
honing
betwe
inconsistent
operations
to
heat
treatment
of
stock
bore
operation
en
the
distortion whi
on
achieve
in
quality
at
this
of
honing
at the green
bore
centre
the
hardened gear:
the
finished
achieved
process.
stage, the
is
to
correct
line
ch
by
Although
general
that
it
follows
honing
the heat
and
the
takes place
the
size,
geometry
accurate location
the
heat treatment still induces di
geometric
the
average bore centre line.
stage and using
treatment distortions
teeth
pitch diameter
during
first
heat
to
remove
and surface finish.
throughout
quality
it
treatment
the
is maintained.
throughout
about
is
thus
major
Operational
Component
Bore diameter
Bo
re
length
Material EN352 Hardened
Stoc
k removal 0, 12 - 0, 18 mm
Surface finish 0.5
Toleranc
Diameter 0,0075
Roundn
Taper 0,0025
Pr
odu
the
metal
cutting
stortions, which
It
is
therefore
the
manufacturing
the
established centre line.
positively maintained .
it
is
sometimes
amount
of
advisable
distortion and shrinkage;
Details
Spe
40
35
e:
ess 0,0025
cti
on rate
60
operations
apparent
processes, w ill
to
(
Hard
ed Gear
mm
mm
µm
Ra
mm
mm
mm
parts
per hou
is also
results
that
The
perform
Hone
)
r
It s
hould
be
noted
that
these
two
involved
constant
if
.
only
one
honing
honing
operation
operations
was
used,
SIMILA R RESULTS
WITH SPLINED OR
do
not
on
the
basis
ARE
increase
that
OBTAINED ON GEARS
the
the
cycle
speed
KEYWAYED
time.
The
same
at
which
the
material can
BORES
time
wou
be
ld
be
cut
is a
To appreciate
various aspects
the
advantages
of
honing which collectively constitute an effective installation and these are basically:-
which
honing can
offer
in
the
manufacture
The Honing Machine
The Honing Tool
The Honing Fixture (manual or automatic)
The Cutting Medium
The
Honing
For volume production purposes the machine is required
continuous working,
Machine
with
power and capacity
to
suit
to
be
the
component
of
expanding the cutting medium should be positive and continuous
cutting medium.
rate - in
The
fact
Honing
The honing tool is an important part
the component being honed. Together
It
should also be capable
the cutting rate
Tool
throughout
of
a honing installation and is specifically designed
with
of
catering for distortions
the honing cycle should be constant.
its specialised design
in its correct position.
The
Honing
Here again specialisation
position relative
honing tool. Depending upon quantities involved
arrangement, although even in
The
Cutting
Fixture
is
the key
to
the honing tool, whilst catering
Medium
the
to
case
success, since the fixture is required
for
the
forces produced by
the
fixturing can be a manually loaded
of
a manually loaded installation the honing cycle
The cutting medium can be either diamond, Cubic Boron Nitride
cutting medium
to
be compatible
with
the material being honed
to
of
gears
it
is
first
necessary
robust construction
to
withstand the demands
being honed. The machine feed system
to
prevent variations
by
abrading
it
is
also required
to
hold
the
or
vitrified abrasive.
in
the force applied
any
high spots
to
to
hold the cutting medium firmly
the
component in the correct
at
a consistent cutting
suit
the characteristics
rotation and reciprocation
or
fully automatic
is
completely automatic.
It
is however essential
ensure efficiency and economy.
to
consider the
for
to
of
for
of
the
of
the
the
CONCLUSION
There
is
no
doubt
that
in modern industry the advantages
a large contribution
to
economical gear manufacture. Although
honing speed gears, other types
The
Technical Sales
any
further
information
Department
that
A.A.Jones& Shipman Limited
Narborough Road South, Leicester LE3
Telephone: 0533 896222 Telex: 341288 Telegrams: '
A Jones•Shipman Publication
2M
2/81
of
honing gear bores is becoming more apparent and offers
we
have described more specifically green and hard
of
gears can also be successfully processed.
(Honing Division)
you
may
require.
2LF
of
ENGLAND
Chuck
A. A.
Jones & Shipman
Leicester'
Ltd.,
is available
to
provide
Printed in England
Loading...