Title of Invention	AN IMPROVED WELDING METHOD WITH MULTIPLE ARCS USING SINGLE WIRE FEEDER IN SINGLE POWER SOURCE
Abstract	The invention relate to improve the technology in submerged arc welding process, for feeding the wires from the two wire spools using two integrated wire feeding system with single motor shaft and power delivering from one power source with one control system is required fro performing the multiple arcs using single wire feeder in single power source in submerged technology. With new design of wire feeder simultaneously multi wires (same/ different) chemistry can be feed in the same wire feeder in same feed rate for different current rating. This new multiple arc using single wire feeder in single power source in submerged arc welding technology will enhance the production rate in double when compared to the conventional single wire submerged arc welding process. An integral shaft is designed and interfaced with the available DC wire feeder for coupling the additional wire feeder for feeding the wire in the separate arc cavity in SAW process. With this new multiple arcs using single wire feeder in single power source technology additional welding can be provided in both direction of welding. This results additional weld deposit with different heat in¬put energy available in the arc zone. Additional power source and control system is not required for this new design of multiple arcs using single wire feeder in single power sources in submerged arc welding technology. This new multiple arcs using single wire feeder system technology has interfaced with the existing SAW machine for plate welding, panel welding. In new multiple arc using single wire feeder in single power sources in submerged arc welding technology, a newly designed wire feeder (R), tine main wire, and a additional wire feed simultaneously using to different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In conventional SAW process the heat input energy was calculated by the separate arc energy of two different DC arcs. This new multiple arcs using single wire feeder in single power source in submerged arc welding technology is one of the advanced technique make use of single power source make two different arc energy available in the arc stream can increase the deposition rate as equivalent to the that of conventional SAW process. Thus, the new multiple arcs using single wire feeder in single power source in submerged arc welding technology can assure for increased transfer efficiency comparatively with other method. This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arcs using single wire feeder in single power source in submerged arc welding technique will results in 40 % increase in deposition rate and better mechanical properties are achievable over conventional Tandem submerged arc welding process.

Title of Invention

AN IMPROVED WELDING METHOD WITH MULTIPLE ARCS USING SINGLE WIRE FEEDER IN SINGLE POWER SOURCE

Abstract

The invention relate to improve the technology in submerged arc welding process, for feeding the wires from the two wire spools using two integrated wire feeding system with single motor shaft and power delivering from one power source with one control system is required fro performing the multiple arcs using single wire feeder in single power source in submerged technology. With new design of wire feeder simultaneously multi wires (same/ different) chemistry can be feed in the same wire feeder in same feed rate for different current rating. This new multiple arc using single wire feeder in single power source in submerged arc welding technology will enhance the production rate in double when compared to the conventional single wire submerged arc welding process. An integral shaft is designed and interfaced with the available DC wire feeder for coupling the additional wire feeder for feeding the wire in the separate arc cavity in SAW process. With this new multiple arcs using single wire feeder in single power source technology additional welding can be provided in both direction of welding. This results additional weld deposit with different heat in¬put energy available in the arc zone. Additional power source and control system is not required for this new design of multiple arcs using single wire feeder in single power sources in submerged arc welding technology. This new multiple arcs using single wire feeder system technology has interfaced with the existing SAW machine for plate welding, panel welding. In new multiple arc using single wire feeder in single power sources in submerged arc welding technology, a newly designed wire feeder (R), tine main wire, and a additional wire feed simultaneously using to different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In conventional SAW process the heat input energy was calculated by the separate arc energy of two different DC arcs. This new multiple arcs using single wire feeder in single power source in submerged arc welding technology is one of the advanced technique make use of single power source make two different arc energy available in the arc stream can increase the deposition rate as equivalent to the that of conventional SAW process. Thus, the new multiple arcs using single wire feeder in single power source in submerged arc welding technology can assure for increased transfer efficiency comparatively with other method. This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arcs using single wire feeder in single power source in submerged arc welding technique will results in 40 % increase in deposition rate and better mechanical properties are achievable over conventional Tandem submerged arc welding process.

Full Text	TITLE: AH IMPROVE WELDING METHOD WITH MULTIPLE ARCS USING SINGLE WIRE BEEPER IN SINGLE POWER SOURCE FIELD OF INVENTION The invention relates to an improve method for Welding with multiple arcs using single wire feeder in single power source in submerged arc welding with using two different wire feeders assembly in a single motor shaft with single Direct current constant voltage power source adaptable to panel welding, butt joint/ hardfacing of different combination of filler wires using submerged arc welding applications. BACK GROUND QF THE WVEMUPM The conventional tandem submerged arc welding process essentially characterized by the use of one additional wire feeder with an Alternate Current power source, was synchronized with another Direct current constant voltage power source, wire feeder with control system for controlling the wire feed rate and delivering the two different DC/AC arcs simultaneously using two different power sources for butt joint/hard facing of different/same combination of filler wires using tandem wire submerged arc welding applications. In, "welding with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding process", a newly designed wire feeder (R), the main wire, and an additional wire fed simultaneously using two different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In -2- conventional tandem SAW process the heat input energy was calculated by the average energy of two different DC/AC arcs. With welding with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding technology process the two DC arcs calculated the heat input energy. It is therefore a high dilution process with approximately twice as much plates are being melted as wire. This welding with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding technology process is one of the advanced technique make use of single power source energy available in the arc stream can increase the deposition rate as equivalent to that of conventional SAW process. Thus, the new system SAW can assure for increased transfer efficiency comparatively with other method. The multiple arc system provides 1250 A arcs. Which can be configured as DC single power source system. The advantage of the multiple arc system is the control over the phase relationship. When two welding arcs are running close together, an anormally known as warc blow0 occurs as the magnetic fields created by the high currents repel each other and actually blow molten metal out of the weld puddle. The multiple arc system has the ability to synchronize the phase relationship between multiple arcs allowing unprecedented control over arc blow. Conventional welding equipment is limited to phase relationship. This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arc system SAW technique will results in 40% increase in deposition rate and a better mechanical property is achievable over conventional submerged arc welding process. In welding with multiple arcs using two wire feeders system in -3- single wire feeder motor in single power source for submerged arc welding technology, for creating an additional separate weld pool is required to interface one additional wire feeder along with main wire feeder with same control system in same wire feeder motor using single Direct current constant voltage power source to attain the required chemistry and mechanical properties. An united states Patent 7166818 discloses a process development for making tandem submerged arc welding process wherein An electric arc welding apparatus comprising a first consumable electrode and a second consumable electrode movable in unison along a welding path between the edges of two adjacent, mutually grounded plates, a first power supply for passing a first welding current at a first low frequency between the first electrode and the two plates, a second power supply for passing a second welding current at a second low frequency between the second electrode and the two plates, where each of the power supplies includes a three phase voltage input operated at line frequency, a rectifier to convert the input voltage to a DC voltage link and a high frequency switching type inverter converting the DC voltage link to a high frequency AC current, an output rectifier circuit to provide a positive voltage terminal and a negative voltage terminal, and an output switching network operated at a given low frequency for directing a pulsating welding current at the given low frequency from the two terminals across one of the electrodes and the plates, and a circuit for independently adjusting the given low frequency so the value of the first low frequency of the first power supply is different from the second low frequency of the second supply. -4- A Further united states Plants 7220940 B2 dt May, 22,2007 discloses a Process development for system for welding with multiple arcs. A system for welding with a first and second arc between a first and second electrode respectively and a common work piece, when each of the electrodes is driven by a power lead from a single power source, The system comprises an inductor with a core, a center tap, a first end, a second end, a first coil section between the tap and the first end and a second coil section between the tap and the second end where the power lead is connected to the tap. A first circuit connecting the first arc in series with the first coil section and a second circuit connecting the second arc in series with the second coil section, a first separate auxiliary inductor in the first circuit between the first coil section and the first arc and a second separate auxiliary inductor in the second circuit between the second coil section and the second arc. The invention is directed to a further development that, "welding with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding technology in a common work piece. The similar/ dissimilar wires as main wires are fed simultaneously using two different wire feeders assemblies and nozzles in a single integrated wire feeder motor shaft with same control system drawing power from a single Direct current constant power source with parameters of 800 A, 32 V and 0,5 m/min as welding speed". The wires in the contact nozzles are arranged in parallel to the welding direction creating a different weld pool in which the required weld chemistry were obtained from the use of two wire of different/ same chemistry. The system comprises an integrated two wire feeder assemblies in a single wire feeder motor -5* using single power sources and the power lead connected to the first wire feeder and the second wire feeder in series. The results are saving in energy, cycle time reduction and high productivity. OBJECTS QF THE IHVENTIQH It is therefore, an object of the present invention to propose an Improve welding method with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding which saves energy and reduces the cycle time. Another object of the present invention is to propose an Improve welding method with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding which is considerable saving in manufacturing economics. A further object of the present invention is to propose an Improve welding method with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding which is eco-fhendry. SUMMARY OF THE INVENTION The invention relate to \mprwe the technology in submerged arc welding process, for feeding the wires from the two wire spools using two integrated wire feeding system with single motor shaft and power delivering from one power source with one control system is required fro performing the multiple arcs using single wire feeder in single power source in submerged technology. -6- With new design of wire feeder simultaneously multi wires (same/ different) chemistry can be feed in the same wire feeder in same feed rate for different current raiting. This new multiple arc using single wire feeder in single power source in submerged arc welding technology will enhance the production rate in double when compared to the conventional single wire submerged arc welding process. An integral shaft is designed and interfaced with the available DC wire feeder for coupling the additional wire feeder for feeding the wire in the separate arc cavity in SAW process. With this new multiple arcs using single wire feeder in single power source technology additional welding can be provided in both direction of welding. This results additional weld deposit with different heat in- put energy available in the arc zone. Additional power source and control system is not required for this new design of multiple arcs using single wire feeder in single power sources in submerged arc welding technology. This new multiple arcs using single wire feeder system technology has interfaced with the existing SAW machine for plate welding, panel welding. In new multiple arc using single wire feeder in single power sources in submerged arc welding technology, a newly designed wire feeder (R), the main wire, and a additional wire feed simultaneously using to different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In conventional SAW process the heat input energy was calculated by the separate arc energy of two different DC arcs. This new multiple arcs using single wire feeder in single power source in submerged arc welding technology is one of the advanced technique make use of single power source make two different arc energy available in the arc stream can increase the deposition rate as equivalent to the that of conventional SAW process. Thus, the new multiple arcs using single wire feeder in single power source in submerged arc welding technology can assure for increased transfer efficiency comparatively with other method. -7- This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arcs using single wire feeder in single power source in submerged arc welding technique will results in 40 % increase in deposition rate and better mechanical properties are achievable over conventional Tandem submerged arc welding process. BRIEF DESCRIPTION OF THE DRAWING Fig 1. is prospective view of welding with multiple arcs using two wire feeders system in single wire feeder motor in single power source for submerged arc welding technology for butt welding/hardfacing/panel welding as per invention. PETTED DESCRIPTION OF A PREFERRED EMBODIMENT QF THE INVENTION This new method of welding with multiple arcs using two wire feeders system m single wire feeder motor in single power source for submerged arc welding technology with a special design of wire feeding system can be fitted to conventional submerged arc welding machine. By this technique same/ different composition (1) of filler materials weld metal combination can be done effectively. The synchronous operation of two wire feeders (2) mounted on a integral shaft (3) is shown in Rg 1. The dissimilar/ similar wire combination is fed using a two wire feeder assembly (2) with two nozzles (4) connected to a single power source (6) are coupled by power cable (7) in parallel. A multi weld pool is -8- created in which the new weld chemistry is obtained by using two wires of different/ same chemistry. To attain the required hardness as well as the required microstructure of the weld metal chemistry, twin submerged arc welding can be used in pool (5) is created. In the arc cavity the filler wires with different/ same chemical composition wires are fed simultaneously in a two nozzle is shown in Fig 1. By using the present invention, the welding current for panel/ plates welding is about 200 amperes to at least about 1250 amperes. In accordance with the invention, the electric arc welder includes a first and second consumable electrode, which electrodes are moved in unison along a welding path between the edges of the grounded plate. Power supply from one power source is used for passing welding currents between the individual electrodes and the plates forming the grounded work piece of the welding circuit. The new design enable welding/ surfacing to be carried out in grooves having a width of different sizes. The tandem submerged arc welding with special wire feeder can be used for welding/hardfacing of butt joints and surfacing. This technique can be used for both mechanized and as well as automatic mode. This results in savings in energy, cycle time reduction and higher productivity. -9- The invention relate to improve the technology in submerged arc welding process, for feeding the wires from the two wire spools using two integrated wire feeding system with single motor shaft and power delivering from one power source with one control system is required fro performing the multiple arcs using single wire feeder in single power source in submerged technology. With new design of wire feeder simultaneously multi wires (same/ different) chemistry can be feed in the same wire feeder in same feed rate for different current rating. This new multiple arc using single wire feeder in single power source in submerged arc welding technology will enhance the production rate in double when compared to the conventional single wire submerged arc welding process. An integral shaft is designed and interfaced with the available DC wire feeder for coupling the additional wire feeder for feeding the wire in the separate arc cavity in SAW process. With this new multiple arcs using single wire feeder in single power source technology additional welding can be provided in both direction of welding. This results additional weld deposit with different heat in¬put energy available in the arc zone. Additional power source and control system is not required for this new design of multiple arcs using single wire feeder in single power sources in submerged arc welding technology. This new multiple arcs using single wire feeder system technology has interfaced with the existing SAW machine for plate welding, panel welding. In new multiple arc using single wire feeder in single power sources in submerged arc welding technology, a newly designed wire feeder (R), tine main wire, and a additional wire feed simultaneously using to different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In conventional SAW process the heat input energy was calculated by the separate arc energy of two different DC arcs. This new multiple arcs using single wire feeder in single power source in submerged arc welding technology is one of the advanced technique make use of single power source make two different arc energy available in the arc stream can increase the deposition rate as equivalent to the that of conventional SAW process. Thus, the new multiple arcs using single wire feeder in single power source in submerged arc welding technology can assure for increased transfer efficiency comparatively with other method. This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arcs using single wire feeder in single power source in submerged arc welding technique will results in 40 % increase in deposition rate and better mechanical properties are achievable over conventional Tandem submerged arc welding process.

Full Text

TITLE: AH IMPROVE WELDING METHOD WITH MULTIPLE ARCS USING
SINGLE WIRE BEEPER IN SINGLE POWER SOURCE
FIELD OF INVENTION
The invention relates to an improve method for Welding with multiple arcs using
single wire feeder in single power source in submerged arc welding with using
two different wire feeders assembly in a single motor shaft with single Direct
current constant voltage power source adaptable to panel welding, butt joint/
hardfacing of different combination of filler wires using submerged arc welding
applications.
BACK GROUND QF THE WVEMUPM
The conventional tandem submerged arc welding process essentially
characterized by the use of one additional wire feeder with an Alternate Current
power source, was synchronized with another Direct current constant voltage
power source, wire feeder with control system for controlling the wire feed rate
and delivering the two different DC/AC arcs simultaneously using two different
power sources for butt joint/hard facing of different/same combination of filler
wires using tandem wire submerged arc welding applications.
In, "welding with multiple arcs using two wire feeders system in single wire
feeder motor in single power source for submerged arc welding process", a
newly designed wire feeder (R), the main wire, and an additional wire fed
simultaneously using two different feeder assemblies and nozzles. The wires in
the contact nozzles are arranged in parallel to the welding direction. In
-2-

conventional tandem SAW process the heat input energy was calculated by the
average energy of two different DC/AC arcs. With welding with multiple arcs
using two wire feeders system in single wire feeder motor in single power source
for submerged arc welding technology process the two DC arcs calculated the
heat input energy. It is therefore a high dilution process with approximately
twice as much plates are being melted as wire. This welding with multiple arcs
using two wire feeders system in single wire feeder motor in single power source
for submerged arc welding technology process is one of the advanced technique
make use of single power source energy available in the arc stream can increase
the deposition rate as equivalent to that of conventional SAW process. Thus, the
new system SAW can assure for increased transfer efficiency comparatively with
other method. The multiple arc system provides 1250 A arcs. Which can be
configured as DC single power source system. The advantage of the multiple arc
system is the control over the phase relationship.
When two welding arcs are running close together, an anormally known as warc
blow0 occurs as the magnetic fields created by the high currents repel each other
and actually blow molten metal out of the weld puddle. The multiple arc system
has the ability to synchronize the phase relationship between multiple arcs
allowing unprecedented control over arc blow. Conventional welding equipment
is limited to phase relationship. This results in a highest usable melting rate for
given arc energy for good penetration, nil arc blow. Thus this multiple arc
system SAW technique will results in 40% increase in deposition rate and a
better mechanical property is achievable over conventional submerged arc
welding process. In welding with multiple arcs using two wire feeders system in
-3-

single wire feeder motor in single power source for submerged arc welding
technology, for creating an additional separate weld pool is required to interface
one additional wire feeder along with main wire feeder with same control
system in same wire feeder motor using single Direct current constant voltage
power source to attain the required chemistry and mechanical properties.
An united states Patent 7166818 discloses a process development for making
tandem submerged arc welding process wherein
An electric arc welding apparatus comprising a first consumable electrode and a
second consumable electrode movable in unison along a welding path between
the edges of two adjacent, mutually grounded plates, a first power supply for
passing a first welding current at a first low frequency between the first
electrode and the two plates, a second power supply for passing a second
welding current at a second low frequency between the second electrode and
the two plates, where each of the power supplies includes a three phase voltage
input operated at line frequency, a rectifier to convert the input voltage to a DC
voltage link and a high frequency switching type inverter converting the DC
voltage link to a high frequency AC current, an output rectifier circuit to provide
a positive voltage terminal and a negative voltage terminal, and an output
switching network operated at a given low frequency for directing a pulsating
welding current at the given low frequency from the two terminals across one of
the electrodes and the plates, and a circuit for independently adjusting the given
low frequency so the value of the first low frequency of the first power supply is
different from the second low frequency of the second supply.
-4-

A Further united states Plants 7220940 B2 dt May, 22,2007 discloses a Process
development for system for welding with multiple arcs.
A system for welding with a first and second arc between a first and second
electrode respectively and a common work piece, when each of the electrodes is
driven by a power lead from a single power source, The system comprises an
inductor with a core, a center tap, a first end, a second end, a first coil section
between the tap and the first end and a second coil section between the tap and
the second end where the power lead is connected to the tap. A first circuit
connecting the first arc in series with the first coil section and a second circuit
connecting the second arc in series with the second coil section, a first separate
auxiliary inductor in the first circuit between the first coil section and the first arc
and a second separate auxiliary inductor in the second circuit between the
second coil section and the second arc.
The invention is directed to a further development that, "welding with multiple
arcs using two wire feeders system in single wire feeder motor in single power
source for submerged arc welding technology in a common work piece. The
similar/ dissimilar wires as main wires are fed simultaneously using two different
wire feeders assemblies and nozzles in a single integrated wire feeder motor
shaft with same control system drawing power from a single Direct current
constant power source with parameters of 800 A, 32 V and 0,5 m/min as welding
speed". The wires in the contact nozzles are arranged in parallel to the welding
direction creating a different weld pool in which the required weld chemistry
were obtained from the use of two wire of different/ same chemistry. The
system comprises an integrated two wire feeder assemblies in a single wire
feeder motor
-5*

using single power sources and the power lead connected to the first wire feeder
and the second wire feeder in series. The results are saving in energy, cycle
time reduction and high productivity.
OBJECTS QF THE IHVENTIQH
It is therefore, an object of the present invention to propose an Improve welding
method with multiple arcs using two wire feeders system in single wire feeder
motor in single power source for submerged arc welding which saves energy and
reduces the cycle time.
Another object of the present invention is to propose an Improve welding
method with multiple arcs using two wire feeders system in single wire feeder
motor in single power source for submerged arc welding which is considerable
saving in manufacturing economics.
A further object of the present invention is to propose an Improve welding
method with multiple arcs using two wire feeders system in single wire feeder
motor in single power source for submerged arc welding which is eco-fhendry.
SUMMARY OF THE INVENTION
The invention relate to \mprwe the technology in submerged arc welding
process, for feeding the wires from the two wire spools using two integrated wire
feeding system with single motor shaft and power delivering from one power
source with one control system is required fro performing the multiple arcs using
single wire feeder in single power source in submerged technology.
-6-

With new design of wire feeder simultaneously multi wires (same/ different)
chemistry can be feed in the same wire feeder in same feed rate for different
current raiting. This new multiple arc using single wire feeder in single power
source in submerged arc welding technology will enhance the production rate in
double when compared to the conventional single wire submerged arc welding
process. An integral shaft is designed and interfaced with the available DC wire
feeder for coupling the additional wire feeder for feeding the wire in the separate
arc cavity in SAW process. With this new multiple arcs using single wire feeder
in single power source technology additional welding can be provided in both
direction of welding. This results additional weld deposit with different heat in-
put energy available in the arc zone. Additional power source and control
system is not required for this new design of multiple arcs using single wire
feeder in single power sources in submerged arc welding technology. This new
multiple arcs using single wire feeder system technology has interfaced with the
existing SAW machine for plate welding, panel welding. In new multiple arc
using single wire feeder in single power sources in submerged arc welding
technology, a newly designed wire feeder (R), the main wire, and a additional
wire feed simultaneously using to different feeder assemblies and nozzles. The
wires in the contact nozzles are arranged in parallel to the welding direction. In
conventional SAW process the heat input energy was calculated by the separate
arc energy of two different DC arcs. This new multiple arcs using single wire
feeder in single power source in submerged arc welding technology is one of the
advanced technique make use of single power source make two different arc
energy available in the arc stream can increase the deposition rate as equivalent
to the that of conventional SAW process. Thus, the new multiple arcs using
single wire feeder in single power source in submerged arc welding technology
can assure for increased transfer efficiency comparatively with other method.
-7-

This results in a highest usable melting rate for given arc energy for good
penetration, nil arc blow. Thus this multiple arcs using single wire feeder in
single power source in submerged arc welding technique will results in 40 %
increase in deposition rate and better mechanical properties are achievable over
conventional Tandem submerged arc welding process.
BRIEF DESCRIPTION OF THE DRAWING
Fig 1. is prospective view of welding with multiple arcs using two wire feeders
system in single wire feeder motor in single power source for submerged arc
welding technology for butt welding/hardfacing/panel welding as per invention.
PETTED DESCRIPTION OF A PREFERRED EMBODIMENT QF THE
INVENTION
This new method of welding with multiple arcs using two wire feeders system m
single wire feeder motor in single power source for submerged arc welding
technology with a special design of wire feeding system can be fitted to
conventional submerged arc welding machine. By this technique same/ different
composition (1) of filler materials weld metal combination can be done
effectively. The synchronous operation of two wire feeders (2) mounted on a
integral shaft (3) is shown in Rg 1. The dissimilar/ similar wire combination is
fed using a two wire feeder assembly (2) with two nozzles (4) connected to a
single power source (6) are coupled by power cable (7) in parallel. A multi weld
pool is
-8-

created in which the new weld chemistry is obtained by using two wires of
different/ same chemistry. To attain the required hardness as well as the
required microstructure of the weld metal chemistry, twin submerged arc
welding can be used in pool (5) is created. In the arc cavity the filler wires with
different/ same chemical composition wires are fed simultaneously in a two
nozzle is shown in Fig 1.
By using the present invention, the welding current for panel/ plates welding is
about 200 amperes to at least about 1250 amperes. In accordance with the
invention, the electric arc welder includes a first and second consumable
electrode, which electrodes are moved in unison along a welding path between
the edges of the grounded plate. Power supply from one power source is used
for passing welding currents between the individual electrodes and the plates
forming the grounded work piece of the welding circuit.
The new design enable welding/ surfacing to be carried out in grooves having a
width of different sizes. The tandem submerged arc welding with special wire
feeder can be used for welding/hardfacing of butt joints and surfacing. This
technique can be used for both mechanized and as well as automatic mode.
This results in savings in energy, cycle time reduction and higher productivity.
-9-

The invention relate to improve the technology in submerged arc welding process, for feeding the wires from the two wire spools using two integrated wire feeding system with single motor shaft and power delivering from one power source with one control system is required fro performing the multiple arcs using single wire feeder in single power source in submerged technology.
With new design of wire feeder simultaneously multi wires (same/ different) chemistry can be feed in the same wire feeder in same feed rate for different current rating. This new multiple arc using single wire feeder in single power source in submerged arc welding technology will enhance the production rate in double when compared to the conventional single wire submerged arc welding process. An integral shaft is designed and interfaced with the available DC wire feeder for coupling the additional wire feeder for feeding the wire in the separate arc cavity in SAW process. With this new multiple arcs using single wire feeder in single power source technology additional welding can be provided in both direction of welding. This results additional weld deposit with different heat in¬put energy available in the arc zone. Additional power source and control system is not required for this new design of multiple arcs using single wire feeder in single power sources in submerged arc welding technology. This new multiple arcs using single wire feeder system technology has interfaced with the existing SAW machine for plate welding, panel welding. In new multiple arc using single wire feeder in single power sources in submerged arc welding technology, a newly designed wire feeder (R), tine main wire, and a additional wire feed simultaneously using to different feeder assemblies and nozzles. The wires in the contact nozzles are arranged in parallel to the welding direction. In conventional SAW process the heat input energy was calculated by the separate arc energy of two different DC arcs. This new multiple arcs using single wire feeder in single power source in submerged arc welding technology is one of the advanced technique make use of single power source make two different arc energy available in the arc stream can increase the deposition rate as equivalent to the that of conventional SAW process. Thus, the new multiple arcs using single wire feeder in single power source in submerged arc welding technology can assure for increased transfer efficiency comparatively with other method.

This results in a highest usable melting rate for given arc energy for good penetration, nil arc blow. Thus this multiple arcs using single wire feeder in single power source in submerged arc welding technique will results in 40 % increase in deposition rate and better mechanical properties are achievable over conventional Tandem submerged arc welding process.

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Patent Number

272447

Indian Patent Application Number

510/KOL/2008

PG Journal Number

14/2016

Publication Date

01-Apr-2016

Grant Date

01-Apr-2016

Date of Filing

12-Mar-2008

Name of Patentee

BHARAT HEAVY ELECTRICALS LIMITED

Applicant Address

REGIONAL OPERATIONS DIVISION (ROD), PLOT NO: 9/1, DJ BLOCK 3RD FLOOR, KARUNAMOYEE, SALT LAKE CITY, KOLKATA-700 091, HAVING ITS REGISTERED OFFICE AT BHEL HOUSE, SIRI FORT, NEW DELHI-110049

Inventors:

#	Inventor's Name	Inventor's Address
1	MANNARSAMY RAMKRISHNAN	NA
2	POOSARI PERIASAMY	NA
3	KRISHNASAMY PADMANABAN	NA

PCT International Classification Number

B23K 9/10

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA