PARKEN ENGINEERING MK127var1 Manual

PARKEN ENG. EQ. CO. P/L
Parken Engineering
Abrasive Belt Roll Grinder
MK127var1
Operating and Maintenance
Instructions
PARKEN ENGINEERING EQ. CO. P/L 1/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
PARKEN ENGINEERING EQ. CO. P/L 2/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
PARKEN
Abrasive Belt Roll Grinder
K127var1
Improve productivity by using Parken’s latest diamond
belted roll grinder.
Parken Engineering has developed a roll grinder,
capable of with standing the rapid removal of hard materials
from cylinder rods etc.
Used mainly as a lathe attachment, mounted to the
saddle of a lathe it is used as a roll grinder.
The K127var1 has been designed for use with
diamond belts where surface speeds of 10,000 surface ft per
minute are used.
Features:-
Belt capacity 100mm wide x 3353mm long
Power 11kw
Surface speed 500 meters/minute infinitely
variable to 3050 meters/minute
Head adjustable for free belt grinding
Coolant tap and nozzle
Compact design
Base complete with mounting holes
Vee belt driven spindle
Spindle heavy duty type No. 40 mounting taper
Overall belt guard
Regulated pneumatic belt tension and release
anual tracking
Chrome plated ram
Easy speed change with raise and lower buttons
11kw ac variable speed drive
PARKEN ENGINEERING EQ. CO. P/L 3/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Abrasive belt selection
Stock removal rate Belt grade
Extra heavy 12-16-20
Heavy 20-24-30-36-40
edium 50-60-80
Light 100-120-150-A160-A130
edium Polishing 180-220-240-A100-A80-A65
Light Polishing 280-320—360-400-500-600-
A45-A16-A6
PARKEN ENGINEERING EQ. CO. P/L 4/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Belt speeds for offhand grinding
aterial Belt speed meters/sec
steel 36
Cast steel 33
Stainless steel 34
Aluminium 40 when using coarse belts
Aluminium 34 when using fine belts
Brass 38
Titanium 13.5
Glass 25 silicon carbide
Glass 39 diamond
Rubber 23
Stone 35
Cobalt 25 when using coarse belts
Cobalt 19 when using fine belts
agnesium 28
PARKEN ENGINEERING EQ. CO. P/L 5/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Belt tensions
Base for calculations
13 kg/25 mm width of belt for typical fabric backing
23 kg/25 mm width of belt for flex diamond
20 kg idler wheel assembly weight
2563 sq.mm piston area
Belt type Kpa for 100mm wide belt
At pressure gauge
Silicon carbide fabric backing 310 Kpa max.
Flexible diamond 430 Kpa max.
PARKEN ENGINEERING EQ. CO. P/L 6/15 127var3mf.doc12/15/11
Pressure switch Pressure regulator
Pressure
isolator
Pressure gauge
Filter press
To drain
Tracking adjusting
knob
onnect air
Supply here

PARKEN ENG. EQ. CO. P/L
Recommended operating parameters
3 flexible diamond belts
belt speed 36-51 met/sec
work rotation oppose belt direction
workpeice speed 0.5 – 1.6 met/sec
traverse rate 10 – 25% of belt width per rev
contact wheel 90A plain faced or high land to groove
ratio (grinding)
65A plane faced (polishing)
coolant water with rust inhibitor
belt tension see table
current load 3 to 8 amps over idling
PARKEN ENGINEERING EQ. CO. P/L 7/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Preparation
1 With roll grinder mounted at correct center height align contact
wheel parallel with work roll.
2 Air must be supplied to belt tension cylinder to enable pressure
switch
1. Dressing of contact whee
a. Grind a work roll approx. 200 mm long
b. Fasten a piece of 80 grit silicon carbide abrasive to ground
surface.
c. Switch on contact wheel at maximum speed
d. With work piece locked in place feed contact wheel over
abrasive and take light cut to clean up contact wheel.
e. Carefully dress outside edges of contact wheel lightly
PARKEN ENGINEERING EQ. CO. P/L 8/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Operating instructions
1 switch off belt tension, and remove belt and replace with
selection, retension belt, using table as guide.
2 Turn belt on at slow speed and track belt using knob at side of
machine
3 The work roll and the roll grinder should be running in opposite
directions at the contact point.
3 Start the traverse of the roll grinder and infeed until contact is
made then load up to approximately 3 amps over idle on first couple
of passes.
4 Infeed at either end of work roll
5 Limit the travel to enable contact wheel to come off roll by no
more than 1/3 contact wheel width.
6 For abrasive belts gradually increase loading after each pass.
7 Finer finishes are obtained by using finer belts, refer to belt
speed and type selection table.
8 Contact wheels should be dressed and balanced to prevent
excessive belt wear.
9 Remove high spots
10 Spark out before each belt grade reduction
11 Ensure coolant flow is filtered and flowing, covering full width
of belt
PARKEN ENGINEERING EQ. CO. P/L 9/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Unpacking container
1 Remove steel straps
2 Remove top of box
3 Remove sides
4 Remove electrical control cabinet
5 Undo coach screws holding the roll grinder in
container
6 Using lifting bracket provided remove roll grinder
from container base
7 Undo screws holding machine to box section
8 ount machine on sub base to suit center height of
lathe
PARKEN ENGINEERING EQ. CO. P/L 10/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
Installation
1 ount roll grinder onto sub base/adaptor to bring
contact wheel up to correct center height of lathe
2 Position roll grinder on cross slide so that maximum
capacity is obtained, and rigidity is retained.
3 Bolt sub base to cross slide together with roll grinder
making sure that contact wheel center is inline with
lathe center
4 ount electrical control cabinet clear of any moisture
and dust.
5 Use a qualified electrical contractor for electrical
installation.
6 Concentrically screened cable 3 active, and earth
should be used to supply motor from control box.
See notes in enclosed Drive booklet.
7 The pressure switch at the air filter/regulator unit
prevents operation of motor until belt is tensioned.
Pressure switch must be connected to control
cabinet terminal strip a shown in attached photo.
8 A lubricated air supply should be connected to the
pressure isolator at the air filter/regulator located
near tracking knob.
9 Ensure that air and electrical supply lines both power
and pressure switch have excess length to cover
extremes of movement in both traverse and
longitudinal directions.
10 Electrical cabinet is fully sealed if roll grinder drive
over temperature trips/fault “O-t” then cabinet should
be cooled/air conditioned.
PARKEN ENGINEERING EQ. CO. P/L 11/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
PARKEN ENGINEERING EQ. CO. P/L 12/15 127var3mf.doc12/15/11
Remove bridge to connect pressure
switch between terminals 1&2
Connnect motor to
Terminals U, V, W
Connect supply
here
Connect EARTH
Optional line filter

PARKEN ENG. EQ. CO. P/L
Grinding problems and there cure
prob em Harder
whee
Softer
whee
Dress contact
whee
Glazing or dulling √
Slow cut √
Too aggressive √
Chatter √ √
Burning √
Dubbing of edges √
PARKEN ENGINEERING EQ. CO. P/L 13/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
aintenance
1 depending on use spindle bearings should be
greased every 3 months using standard bearing grease at
the grease nipples located above spindle housing.
2 keep area around machine clear of obstructions
3 clean area inside contact wheel daily as any
buildup of swarf will cause balancing problems and as a
consequence bad surface finish
PARKEN ENGINEERING EQ. CO. P/L 14/15 127var3mf.doc12/15/11

PARKEN ENG. EQ. CO. P/L
3 clean area inside contact wheel daily as any
buildup of swarf will cause balancing problems and as
a consequence bad surface finish
PARKEN ENGINEERING EQ. CO. P/L 15/15 127var3mf.doc12/15/11
view without be t