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Cutting
Tools, Super Spade Drills, Tools
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Self
Aligning Machine Adjustable Reamers (Million Bore Idea) |
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A
micrometer is used for
setting blades to the
required dimension.
Reaming allowance
recommended
0.12 mm. to 0.17 mm. |
The
micrometric scale
permits very fine
adjustment of blades to
correct size.
Each division adding or
reducing 0.02 mm.on the
diameter |
General
The Self Aligning Machine Adjustable Reamer (SAMAR) is developed
to fulfill the requirement of micro adjustable reamer.
Outstanding
features of this reamer are :
a) It covers a wide range of sizes within one reamer.
b) It has replaceable tungsten carbide tipped cutting blades.
c) It has a positive constant float through-out the range
d) The Float is at the cutting end eliminating special floating
tool holders.
e) It is easy to set size in the machine itself.
f) No Special wrenches or tools are required for setting.
g) Two bladed construction, with diametrically opposed blades
fully supported over the width of blades allows,
i) Greater Coolant and chip passage.
ii) Lower Cutting Pressure
iii) Cooler cutting permitting closer tolerance and finer
finish of the bore.
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Burnishing
One Blade Adjustable Reamer (BOBAR) |
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INTRODUCTION
New machining techniques require new Tools, which in turn lead
to new machining methods. This constant interaction is the driving
force which ultimately leads to progress. It is this very factor
that leads to continuous development of tools and machine tools.
Numerical Control of machine tools represents a milestone in
production methods. However, the increase in operating speed
now possible, together with higher precision and production
automation, also places new demands on the tools.
'Burnishing One Blade Adjustable Reamer' (BOBAR) manufactured
by SUPER SURFACE TOOLS CO., BOMBAY, INDIA, may be a solution
to these new requirements.
Since the beginning of cutting technology for fine machining
of bores, the reaming method has proved indispensable. One of
the main reasons lies in the broad spectrum of application for
which this process can be used - on all machines with either
rotating or stationary tools.
The original HSS multi-blade reamers were replaced by carbide
Tipped blade reamers. Carbide tipped adjustable floating, pair
of blades in a holder (SAMAR & KOYEMANN) gave fine finish.
Now single blade reamers with clamped, precision adjustable
blade and guide pads have put a step forward.
The increasing use of NC-Controlled machines, particularly machining
centres, have brought a further need for tool development which
will allow new methods of increasing performance to full advantage.
This need is now met by BOBAR manufactured by SUPER SURFACE
TOOLS COMPANY, BOMBAY, INDIA.
The cutting process is by means of a precision adjustable, rigidly
clamped blade. Atleast two guide pads placed on the circumference
of the head provide support and guide. In automatic production,
it is vital that the chips removed do not affect the results.
BOBARs have been provided enough chip clearance space between
blade and the two guide pads. Copious coolant supply will also
prevent chips affecting the results. |
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Super
Spade Drills (a known device which in manyways
surpasses twist Drills |
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INTRODUCTION
Spade Drills are a known device which in manyways surpasses
twist Drills in range 24 mm onwards as under :
OPERATIONAL
1) Greater inherent Rigidity.
2) Heavier feed rates more than compensate for 10 % to 15
% reduction in RPM hence.
3) Faster production
4) More chip clearance also adds to production speed.
ECONOMICAL
1) Two piece construction i.e.shank & blade affords many
sizes in only one shank.
2) Blades can be replaced or resharpened.
3) Same blades can be used on short, long & special shanks
4) Depth to diameter ratio in Spade drilling has been achieved
upto 120 : 1
5) With special blades, core drilling, counter boring and
bottoming to flat or contoured shape can be achieved.
6) The shanks can vary from straight to tapered, long to Extra
long and with Miling Machine application i.e. ISO - 40 etc
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