Hyd-Mech P 225, Руководство по эксплуатации и обслуживанию

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Choice of blades
P 225 29
8.1.4 -- Blade structure
The most widely used disc blades for sawing machines are made
of a single piece of HSS--DMo5/M2 characterised by a high level
of toughness and good cutting resistance. For non--ferrous
materials, on the other hand, it is common to use circular blades
with a brazed hard metal HM cutting edge, which have shown
excellent wear resistance but low resistance to impact, which is
in any case a minor problem with non--ferrous materials.
CHEMICAL COMPOSITION :
TYPE OF BLADE
HSS - DMo5/M2
C W Mo V Co HRC Cr
0.85 4.15 6.37 5.00 1.92
64+/--1
KEY:
C = Carbon Co = Cobalt Cr = Chromium
Mo = Molybdenum W = Tungsten V = Vanadium
The numbers in the columns indicate the % of the element
present in the steel.
8.1.5 -- Types of blade
The blades fitted on the P 225 have dimensions 225x32x2 and
are made of HSS DMo5 since the machine is to be used for
cutting ferrous materials. In addition to the size and pitch of the
teeth, however, the blades also have different geometric
characteristics in accordance with their specific use:
-
tooth sharpening, which in this case may be BW with an
alternate raked tooth or C with a roughing tooth raked on both
sides and a non--raked finishing tooth.
- tooth pitch, the distance between the crest of one tooth and
the crest of the next tooth (tooth pitch = T).
Shape of teeth:
”C” TYPE SHARPENING (HZ)
Coarse toothing with roughing tooth raked on both sides and
non--raked finishing tooth. The roughing tooth is about 0.3 mm
higher.
Coarse toothing with roughing tooth and
finishing tooth.
Used on saws with pitch
greater than or equal to 5 mm for cutting
ferrous and non--ferrous materials with solid or
solid--profiled sections.
”BW” TYPE SHARPENING DIN 1838--UNI 4014
Coarse toothing with teeth alternately raked to the right and to the
left.
Toothing generally used on sawing
machines for cutting ferrous materials
and alloys with tubular and profiled
sections.
The P 225 uses 225x2x32 blades made of HSS DMo5 and with
C type sharpening teeth for hollow sections. For solid sections,
on the other hand, it uses blades of the same dimensions but with
a different tooth pitch, as shown in the table below.
Table for choosing blades for the machine P 225; other blade characteristics are: dimensions -- internal
hole 32, distance between fixing holes 63; tooth shape type C.
225
P 225
D. T Z D. T Z D. T Z
225 4 180 225 5 140 225 6 120
Hollow profiles
with thickness
from 1 to 5 mm Hollow profiles
with thickness
from 5 to 10 mm Solid sections
with dimensions that
do not exceed the
cutting capacity