Choosing The Right Boring Tools Is Essential

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Choosing The Right Boring Tools Is Essential
Boring operations, executed to finish the holes
that already exist, are of different types,
depending upon the surface they are to be
executed upon. Boring operations on turning
machines are generally less complicated than
those done on milling machines. In the former
case, the boring tool is moved incrementally by
the machine and in the latter, the boring head
is required to be adjusted to achieve the
desires hole size. This means that the boring
tools for turning can make a hole of any size,
as long as the bar fits into the hole, while the
boring heads for milling machines are limited to
a specific range. Basic boring bars accept
carbide inserts that work well in most
applications and theyre economical too.
Single-edge boring bars have a single point of
contact with the workpiece, which means that is
the bar is unsupported, it can lead to vibration
(or chatter). This chatter is mainly the only
significant drawback of using the boring bar.
However, this chatter can be dealt with too. How
to eliminate chatter? The easiest way to overcome
chatter is to apply a boring bar with a larger
diameter. Although being the easiest way, this
isnt always possible or practical. Hence, other
measures come to play. One solution could be to
work with the cutting speeds and chip loads, to
alter the cutting pressure on the tool. By
increasing the feed rate, the tool pressure can
be increased. Similarly, by decreasing the
cutting speed, the tool pressure can be increased
too. Also,
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changing the radial DOC can put more pressure on
the tool. So, one or more of these aspects can
be altered and adjusted to achieve success with
chatter. Types of boring bars Steel boring bars
are the most commonly used bars because of their
comparatively low cost. However, there are many
other material alternatives available. For
instance, heavy-metal and carbide bars can be
used to fight chatter. Heavy-metal bars are made
from tungsten alloys that are denser than steel
and more expensive, but they can be applied at
higher length-to-diameter ratios, and always
work to damp vibration. In order for comparison,
where steel allows a 41 ratio, heavy-metal bars
can boost the ratio to 61 or even higher, with
some speed-and-feed tuning. Tungsten-carbide bars
can provide even higher depth-to-diameter
ratios, as carbide is extremely dense, and
provides superior damping, thus allowing
length-to-diameter ratios in the range 81 or
higher. Because such heavy-duty bars can be
expensive, you can buy them with interchangeable
heads that accept different inserts. One thing to
note is that vibration-damping bars have
internal mechanisms that can eliminate chatter.
The internal mechanism alters the natural
frequency of the bar, preventing chatter, and
allowing very large length-to-diameter ratios.
Some reports even suggest the ability to make
cuts at 201! The tools are different for milling
and lathe The tools used on a milling machine are
unlike those used for a lathe the one for the
latter to be made adjustable to achieve the
correct size. Boring holes on a milling machine
require the use of an adjustable boring head,
which only adds complexity to the setup. The
boring heads shift the boring bar closer to or
farther away from the axis of the hole to achieve
the desired hole diameter. A large range of hole
sizes can be bored with these heads as the boring
bar can be mounted in several different
positions. On a milling machine, more than one
cutting edge can be engaged, which is unlikely in
the case of a lathe. Twin boring heads can be
set up in one of the two ways first, each
cutting edge is set to the same diameter that
allows a fast feed rate and second, the cutting
edges are set on two different diameters, thus
removing more material per pass. Twin- style
heads are best suited for roughing as they are
not easily adjusted when small incremental
changes are necessary to the boring diameter.
Thus, a finish boring head is required to make
the small adjustments to the diameter, when
finishing.
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Boring requires the use of the right tools to
achieve the desired hole characteristics of
position accuracy, hole geometry, and surface
finish. You thus need to choose the right boring
heads and bars, which you can avail from experts
like FineTech Toolings. Were the right solution
for all your hole-making applications, with our
extensive line of boring heads and bars thus
making us the most diverse boring bar and
precision boring head manufacturers in Bangalore.