Powder Plasma Arc Welding ( PTA ) - PowerPoint PPT Presentation

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Powder Plasma Arc Welding ( PTA )

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Powder Plasma Arc Welding ( PTA ) ARCRAFT PLASMA EQUIPMENTS ( INDIA ... The main Power Source is a reliable inverter based system with indicators for Current and ... – PowerPoint PPT presentation

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Title: Powder Plasma Arc Welding ( PTA )


1
Powder Plasma Arc Welding ( PTA )
  • ARCRAFT PLASMA EQUIPMENTS ( INDIA ) PVT LTD,
  • 124 , DIAMOND INDUSTRIAL ESTATE ,
  • KETKIPADA , DAHISAR ( EAST )
  • MUMBAI 400068, INDIA.
  • email arcraft_at_vsnl.com ,web www.arcraftplasma.c
    om.

2
Arcraft Plasma Equipments (I) Pvt ltd
  • 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 .

3
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.

4
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.
5
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

6
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

7
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

8
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 .

9
Plumbing Board
  • The Plumbing board has all the fittings for
    water , power and gas connections to the torch.

10
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.

11
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.

12
Plasma torch for internal bore welding
13
I D 75 mm pipe
14
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.

15
Controller
16
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.

17
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.

18
Linear weld in control
  • Cycle time
  • Stroke and speed of straight weld
  • Step for number of bands

19
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

20
Welding Positioner
  • Available in tilting or fixed models upto .
  • Faceplate diameter and weight bearing capacity as
    per customer requirement

21
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

22
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

23
Torch Oscillator
  • Consist of stepper motor with ball screw
    mechanism for smooth jerk free movement as per
    signal from controller

24
Water Chiller cum Recirculator
  • Water chiller refrigerator heat transfer
    principle with digital display of water
    temperature .
  • 50 liter water storage capacity

25
Some completed jobs
26
Some completed jobs
27
Internal bore
28
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
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