Wears of Cutting Tool
We
already have been cnc machining parts processed and the rattle of the countless
cracks edge tool, we learn that tool wear are basically three forms : flank
wear, the former flank wear and V-Notch wear. Flank wear occurred in both the
main blade occurred vice blade. On the main blade, shoulder removed because
most metal chip mandate, which resulted in an increase cutting force and
cutting temperature increase, If not allowed to check, That could lead to the
work piece and the tool vibration and provide for efficient cutting conditions
may no longer exist. Vice-bladed on, it is determined work piece dimensions and
surface finish. Flank wear size of the possible failure of the product and
surface finish are also inferior. In most actual cutting conditions, as the
principal in the former first deputy flank before flank wear, wear arrival
enough, Tool will be effective, the results are made unqualified parts.
As
Tool stress on the surface uneven, chip and flank before sliding contact zone
between stress, in sliding contact the start of the largest, and in contact
with the tail of zero, cnc machining parts so abrasive wear in the region occurred. This is because the card
cutting edge than the nearby settlements near the more serious wear, and bladed
chip due to the vicinity of the former flank and lost contact wear lighter.
This results from a certain distance from the cutting edge of the surface
formed before the knife point Ma pit, which is usually considered before wear.
Under normal circumstances, this is wear cross-sectional shape of an arc. In
many instances and for the actual cutting conditions, the former flank wear
compared to flank wear light, Therefore flank wear more generally as a tool
failure of scale signs. But because many authors have said in the cutting speed
of the increase, Maeto surface temperature than the knife surface temperatures
have risen faster. but because any form of wear rate is essentially temperature
changes by the significant impact. Therefore, the former usually wear in
high-speed cutting happen.
The
main tool flank wear the tail is not processed with the work piece surface in
contact, Therefore flank wear than wear along with the ends more visible, which
is the most common. This is because the local effect, which is as rough on the
surface has hardened layer, This effect is by cutting in front of the hardening
of the work piece. Not just cutting, and as oxidation skin, the blade local
high temperature will also cause this effect. This partial wear normally
referred to as pit sexual wear, but occasionally it is very serious. Despite
the emergence of the pits on the Cutting Tool nature is not meaningful impact,
but often pits gradually become darker If cutting continued the case, then
there cutter fracture crisis.
Cnc machining parts If any form of sexual allowed to wear,
eventually wear rate increase obviously will be a tool to destroy failure
destruction, that will no longer tool for cutting, cause the work piece
scrapped, it is good, can cause serious damage machine. For various carbide
cutting tools and for the various types of wear, in the event of a serious
lapse, on the tool that has reached the end of the life cycle. But for various
high-speed steel cutting tools and wear belonging to the non-uniformity of
wear, has been found : When the wear and even to allow for a serious lapse, the
most meaningful is that the tool can re-mill use, of course, In practice,
cutting the time to use than the short time lapse. Several phenomena are one
tool serious lapse began features : the most common is the sudden increase cutting
force, appeared on the work piece burning ring patterns and an increase in
noise
