PM-150М ·
PM-300 ·
PM-301 ·
PM-302 ·
PM-303
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| PM-301 - PTA system for automated surfacing of drilling bit legs |
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The PM-301 PTA system is designed for automated
surfacing of faceplate and cylindrical surfaces
of different parts. Welding deposition is accomplishing
with the high temperature constricted arc, formed
by the PTA 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.
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-21-01 PTA 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-21-01 PTA torch is functioning
on direct polarity current in the range of 20-150А.
The transfer arc (elecrode - workpiece) is forming
in PTA 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-21-01 PTA torch;
- stand;
- electrically driven turntable;
- rotator with inclining axis;
- control system based on PLC;
- remote control unit;
- power source VD-306D;
- water cooling device;
- spare parts complete set.
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Control system:
- provides operating in fixing (chekout) or automatic
modes
- based on PLC
- controller drives the welding cycle and the executive
mechanisms operating
Controller
SMH-2010C
- remote control unit allows to adjust the current,
powder feeding and PTA torch positioning under
the working conditions.
Remote control station
Control
system operator panel
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PM-301 PTA system technical data:
| SYSTEM |
|
| Mains
voltage and frequency |
380 V, 50
Hz |
| Transferred
arc current (direct polarity) |
30
- 300 А |
| Plasma,
transport and shielding 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
(Z-direction) |
300 mm |
| Correction
of torch position |
|
|
X-direction
|
125 mm |
|
Y-direction
|
63 mm |
| Torch
oscillation width |
0 - 30 mm |
| Torch
oscillation speed |
0 - 50 mm/s |
| WORKTABLE |
|
| Worktable
hight over the floor- level |
750 mm |
| DIMENSIONS |
|
| PTA
Unit |
1450х900х1900
mm |
| Control
system |
500х600х1400
mm |
| Power
source |
390х570х600
mm |
| Water
cooling device |
590х780х585
mm |
| WEIGHT |
|
| PTA
unit |
250 kg |
| Control
system |
30 kg |
| Power
source |
125 kg |
| Water
cooling device (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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