Transcript Powder Plasma Arc Welding ( PTA )

Powder Plasma Arc Welding
( PTA )
ARCRAFT PLASMA EQUIPMENTS ( INDIA ) PVT LTD,
124 , DIAMOND INDUSTRIAL ESTATE ,
KETKIPADA , DAHISAR ( EAST )
MUMBAI 400068, INDIA.
email :[email protected] ,web : www.arcraftplasma.com.
Arcraft Plasma Equipments ( India ) Pvt Ltd are leading manufacturers of
Plasma Torches ( Both ID and OD ) Power sources , Positioners ,
Manupilators and related equipment used for PTA welding .
ARCRAFT PLASMA
EQUIPMENTS (I) PVT LTD
PTA
• Powder Plasma welding
is widely used for
hardfacing , wear
resistance , corrosion
resistance , impact
resistance besides
many applications in a
wide variety of
industries.
• The benefit of PPAW
or PTA is that it gives a
strong metallurgical
bond unlike many
thermal spray
processes.
P.T.A. DEPOSITS SHOW THE
FOLLOWING CHARACTERISTICS:
An attractive bead with no signs of
oxidation, and with little or no ripple.
Very low dilution
High, density, no porosity & no inclusions.
Microphotos or x-rays show the deposits to
be of high density & metallurgically bonded
to the Substrate.
PPAW / PTA system
• This is a complete system
consisting of
• Power source
• Plasma torch with cables
• Torch Oscillator
• Controller
• Water chiller and
recirculator
• Positioner
• Torch Manupilator or
Column and Boom
Main Unit
• This is the main unit which
also has the Pilot arc system
for striking the plasma arc.
The main Power Source is a
reliable inverter based
system with indicators for
Current and Voltage .
• It also has Flowmeters for
controlling thePlasma Gas
and Sheilding Gas .
• It has indicators and
switches for various
functions which will be
explained in more detail
Control console
• Flowmeter for Plasma gas and
Shielding Gas
• Power on /off switch with
indicator
• Indicator for gas flow with Test
and Switch off function
• HF/ Pilot arc test and switch
off function.
• Water chiller on / off switch
• Trip indicator for water and
gas failure
• 220 and 24 VAC Fuse in case of
current over drawing due to
fault in electrical / electronic
components
Power Source
• Power source for
delivering power to the
plasma torch
• Power source will be
selected depending on
customers requirement /
location and budget.
• For export models we use
Lincoln ( USA ) power
source with current and
voltage display and
international warranty of
three years .
Plumbing Board
• The Plumbing board has
all the fittings for water
, power and gas
connections to the
torch.
Powder feeder on /off
• This panel gives 220
VAC supply to the
powder feeder and also
the on / off signal .
• It has a floating auxillary
contact for external
interface if required.
Plasma Torch for surface applications.
• 400 Ampere heavy duty
PPAW torch with 8
meter cables for surface
applications.
• Torch is fully servicable
with no moulded parts
for easy replacement.
Plasma torch for internal bore welding
I D 75 mm pipe
Plasma torch for internal bore welding
• This torch can do
service in internal bore
of pipes of minimum
diameter 75 mm and a
length of 500 mm
continuosly . Longer
lengths can be
developed .
• Torches are being
developed for even
smaller bores.
Controller
Controller
• Controller has functions
for controlling the torch
manipulator ( up,down ,
left – right of base )
• Job positioner ( tilting ,
rotation speed and
direction)
• Pilot arcing and weld start
• Programmes for torch
oscillation automatic
weld sequence straight
or circular.
Oscillator control
• Oscillator stroke width
from zero to 25 mm
• Speed of oscillation
upto 60 strokes per
minute
• Dwell time 0 to 9.9
seconds independently
adjustable on both
sides.
Linear weld in control
• Cycle time
• Stroke and speed of
straight weld
• Step for number of
bands
Circular weld programme
• Speed control of
rotational movement
• Cycle count for stepover
of torch for number of
bands .
• Overlap between two
bands can be preset as
required
Welding Positioner
• Available in tilting or
fixed models upto .
• Faceplate diameter and
weight bearing capacity
as per customer
requirement
Torch Manupilator or Column and
Boom
• Various models
available for height and
stroke length
• Provison for oscillator
mounting
• Base can also move and
rotate manual or
motorised options
Powder Feeder
• Hopper capacity of 5 kgs
• Delivery capacity 5 kgs
per hour
• Positive displacement of
powder gives smooth
flow of powder without
pulsing.
• No need to place the
feeder above the torch as
required by gravity based
feeders
Torch Oscillator
• Consist of stepper
motor with ball screw
mechanism for smooth
jerk free movement as
per signal from
controller
Water Chiller cum Recirculator
• Water chiller
refrigerator heat
transfer principle with
digital display of water
temperature .
• 50 liter water storage
capacity
Some completed jobs
Some completed jobs
Internal bore
APPLICATIONS
In a competition with laser surfacing the
PTA technology offers much more high
productivity, comparable high quality of
deposits and significantly lower costs.
Typical application areas of the PTA
technology are extruding machine screws,
valves, valve seats of internal combustion
engines (motorcar, marine, locomotive
etc.), accessories for ships, petroleum
chemistry and power generation, cutting
tools (milling cutters, broaches, knifes)
,Equipment for mining, crushing, rolling,
road building and tunneling, Process
equipment in ceramics and cement
production,Molds and forging dies, Pulp
and paper industry equipment, Agricultural
equipment, parts for nuclear plants, parts
for chemical plants