| PM-300·
· ·PM-301·
· ·PM-302· · ·PM-150Ì·
· ·PM-5,0-40·
· ·Feeder |
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PM-301 PTA system for
automated surfacing
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PM-301 PTA
system
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The PM-301 PTA system is designed for automated
hardfacing of supporting and cylindrical surfaces
of different parts. Welding deposition is accomplishing
with the high temperature constricted arc, formed
by the plasma torch with nonconsumable tungsten elecrode.
The small-grained surfacing powder of the wearproof,
corrosion-resistant and other Fe, Ni and Co-based
alloys is used as the adding material.
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The PM-301 PTA system was delivered to Customer
in special modification designed for hardfacing of
drilling bit legs supporting surfaces.
Hardware configuration could be changed according
to Customer requests and possible geometrical or technological
peculiarities of surfacing.
The special PP-21M plasma torch was developed for the
PM-301 PTA system. It has distinctive small thickness
flat design, which allows to deposit the drilling bit's
supporting surfaces placed sufficiently near the projecture
of the bit leg.
The PP-21M plasma torch is functioning
on direct polarity current in the range of 30-200À.
The transfer arc (elecrode - workpiece) is forming
in plasma torch under the normal working conditions.
The pilot arc (elecrode - nozzle) is used for easing
of the transfer arc ignition. The ancillary pilot
arc is stimulated by the oscillator. The oscillator
and the pilot arc become automatically disconnected
after the full ignition of transfer arc.
The fixing of detail in rotator is
providing by the special pneumatic mechanism, placed
at the rotary face-plate.
The rotator is able to incline the pivot axis in
the angle range of 0...90 degrees, which is suitable
for surfacing of the cylindrical drilling bit leg's
part.
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Special
pneumatic mechanism for fixing of the drilling bit
leg
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PM-301 PTA system consists of:
- surfacing module with the PP-21M plasma torch;
- stand;
- electrically driven turntable;
- rotator with inclining axis;
- control system unit;
- remote control unit;
- rectifier-type welding machine VD-306D;
- water cooling unit ;
- spare parts complete set.
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Control system:
- provides operating in fixing (chekout) or automatic
modes
- based on SMH-2010C controller
- controller drives the welding cycle and the executive
mechanisms operating
Controller
SMH-2010C
- remote control unit allows to adjust the current,
powder feeding and plasma torch positioning under
the working conditions.
Remote control unit
Control
system operator panel
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PM-301 PTA system technical data:
| SYSTEM |
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| Mains
voltage and frequency |
380 V, 50
Hz |
| Transferred
arc current (direct polarity) |
30
- 300 À |
| Plasmaforming,
transporting and protecting gas |
Argon,
mix |
| Working
gas flow rate |
< 15 l/min |
| Cooling water flow rate |
> 4-6 l/min |
| Powder size fraction |
63 - 160 mkm |
| Deposition
rate |
up to 3
kg/h |
| Vertical
motion of torch |
250 mm |
| Correction
of torch position |
|
|
along
|
125 mm |
|
across
|
63 mm |
| Torch
oscillation amplitude |
2 - 30 mm |
| Torch
oscillation frequency |
0 - 100 1/min |
| WORKTABLE |
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| Worktable
hight over the floor- level |
750 mm |
| DIMENSIONS |
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| PTA
Unit |
1450õ900õ1900
mm |
| Control
unit |
500õ600õ1400
mm |
| Power
supply unit |
390õ570õ600
mm |
| Water
cooling system |
590õ780õ585
mm |
| WEIGHT |
|
| PTA
unit |
250 kg |
| Control
unit |
30 kg |
| Power
supply unit |
125 kg |
| Water
cooling system (without the working fluid) |
40 kg |
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Works experiense has shown high effectiveness of
the PM-301 PTA system and stable accuracy of
accepted engineering solutions.
Surfaced sample:
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