FIELD OF INVENTION:
The invention relates to the field of gas cutting with oxygen and acetylene gases
involved in cutting high thickness plates and pipes. Most particularly the
invention relates to parallel twin cutting torches using oxygen and acetylene gases
in single semi-automatic cutting machine. A conventional semi-automatic gas
cutting machine has only one cutting torch for cutting.
BACKGROUND OF THE INVENTION:
Conventionally, a mixture of oxygen and the fuel gas is used to preheat the metal
to its ignition temperature well below its melting point. A jet of pure oxygen is
then directed into the preheated area instigating a vigorous exothermic chemical
reaction between the oxygen and the metal to form iron oxide or slag. The oxygen
jet blows away the slag enabling the jet to pierce through the material and
continue to cut through the material.
The oxy fuel process is the most widely applied industrial thermal cutting process
because it can cut thicknesses from 5 mm to 250 mm, the equipment is low cost
and can be used semi automatically and easily mechanized. There are several
fuel gas cutting torch design options that can significantly enhance performance
in terms of cut quality and cutting speed.
The semi-automatic gas cutting torches are used in cutting of plates, panels,
tube, pipe and test plates for welders qualification, throughout, wherever required
in manufacturing of boilers. It is observed that the time required to cut a
particular product takes more time and more man hours with single gas cutting
torch. Figure 1 shows the schematic view of the conventional semi-automatic
cutting arrangement with single torch.
It is well known that in such a competitive business environment in a
manufacturing industry, cycle time reduction, man hour reduction and machine
hour reduction plays a dominant role which results in significant cost reduction
and early delivery to customers.
This calls for a need to invent a parallel twin gas cutting torch in single semi-
automatic gas cutting machine which significantly reduces man hour, machine

hour and cycle time up to two times compared to conventional single gas cutting
torch.
OBJECTS OF THE INVENTION:
It is therefore an object of the invention to propose parallel twin cutting torches
using oxygen and acetylene gas in a semi-automatic single gas cutting machine
for cutting applications in plates, panels, tubes, pipes and test plates for welders
qualification.
A still further object of the invention is to propose a semi-automatic parallel twin
cutting torches in single cutting machine which is used for cutting applications
reducing the man hour, machine hour and cycle time of manufacturing process,
thus doubly improving the efficiency of process significantly.
SUMMARY OF THE INVENTION:
Accordingly, an additional cutting torch (05) mounting, with suitable arrangement
is designed. This will ensure two parallel steady cutting flames from two cutting
torches in a single cutting machine. That the gas flow is continuous in both the
cutting torches. Both acetylene and oxygen gases are allowed to flow in the two
parallel cutting torches separately. The flow of gases and setting of required
perfect parallel cutting flames is regulated in both the torches as per the
requirement. After the gas is allowed to flow, spark lighter is used to ignite the
flame in both the cutting nozzles. After learning the nature of the flame in both
the torches, the level of gas flow is controlled individually and parallel based on
the requirements of the product being cut. The advantages include 50 percentage
reduced man hour, reduced cycle time, reduced machine hour and 100
percentage increased cutting efficiency that is up to two times compared to
conventional single semi-automatic gas cutting torch.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
It is to be noted, however, that the appended drawings illustrate only typical
embodiments of the present subject matter and are therefore not to be considered
for limiting of its scope, for the invention may admit to other equally effective
embodiments. The detailed description is described with reference to the

accompanying figures. Some embodiments of system or methods in accordance
with embodiments of the present subject matter are now described, by way of
example, and with reference to the accompanying figures, in which:
Figure 1 shows the constructional features of a single torch conventional gas
cutting torch in a semi-automatic cutting machine (01) in accordance to the
invention.
Figure 2 shows saddle tube with integral single whole plate at one end (04) in
accordance to the invention.
Figure 3 shows designed saddle assembly consists of a saddle mount with integral
hexagonal nut and a semi-circular slotted support plate (07) in accordance to the
invention.
Figure 4 shows saddle adjustment bolt through which distance between
additional second torch (05) and machine body (01) is adjusted as per
requirement in accordance to the invention.
Figure 5 shows ‘hexagonal bolt and locking nut (08)’ in accordance to the
invention.
Figure 6 shows the constructional features of parallel twin gas cutting torches in
a single semi-automatic cutting machine in accordance to the invention.
DETAILED DE DESCRIPTION OF THE PREFERRED EMBODIMENTS :-
Figure 1 show a cutting machine body (01) attached to a cutting first torch (02) by
means of an attachment (03), distance between machine body and cutting first
torch (02) can be altered. Oxygen and Acetylene gas is allowed to flow and a spark
lighter is used to ignite the flame in both the cutting nozzles. Depending on the
nature of the parallel flames in both the torches, the intensity of gas flow is
controlled individually based on the requirements of the product being cut. As
shown in figure 1 only single flame cutting is possible.
According to the present invention, Figure 6 shows a parallel twin gas cutting
torches in a single semi-automatic cutting machine. The semi- automatic gas
cutting machine consists of parallel twin cutting torches (02 and 05) through

which the two parallel cutting flames are produced. In the two cutting torches, the
conventional first torch (02) is mounted on a semi-automatic machine and the
cutting second torch (05) is mounted on a saddle assembly (07), saddle tube (04),
saddle adjustment bolt (06) and hexagonal bolt and locking nut (08) for parallel
twin flame simultaneous cutting.
The saddle assembly (07) consists of a saddle mount comprising a hexagonal nut
and a semi-circular slotted support plate. The saddle mount assembly (07) is
connected to the body of the semi-automatic cutting machine body (01) through
the semi circulator slotted support plate by tightening using the ‘hexagonal bolt
and locking nut’ (08). The saddle tube with integral single hole plate at one end
(04) is inserted into the saddle mount assembly (07).
The inserted saddle tube and saddle mount assembly are fastened by the
hexagonal nut using saddle adjustment bolt (06) and for tightening the saddle
tube clockwise movement is provided in the bolt (06). The distance between two
torches (02 and 05) as well as cutting second torch (05) and machine body (01)
can be altered as per requirement with the help of saddle adjustment bolt (06).
Through the single hole plate at one end of the saddle tube (04) the additional
cutting second torch (05) is connected and cutting flames angle can be adjusted to
60 degrees, towards any side form the torch vertical position. The cutting second
torch (05) and its cutting flame is altered by a separate gas source similar first
torch (02).
Through the designed parallel twin cutting torch attachment the parallel
longitudinal cutting is doubled. When the semi-automatic machine moves the
cutting torches, the parallel double cutting flames results in increased cutting
efficiency and reduction of cycle time, man hour and machine hour. The distance
between the two torches may be altered as per job requirement. The cutting
flames angle can also be adjusted to 60 degrees towards any side form the torch
vertical position. This facilitates single taper edge preparation also during cutting
process.

WE CLAIM:
1. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
applications comprising: -
a. a saddle assembly (07) that comprises of a saddle mount with
hexagonal nut and a semi-circular slotted support plate;
b. a saddle tube with a single hole plate at one end (04) inserted in the
saddle mount assembly (07);
c. wherein the saddle tube (04) and saddle mount assembly (07) are
fastened by the hexagonal nut using a saddle adjustment bolt (06).
d. through the single hole plate at one end of the saddle tube (04) and
a second cutting second torch (05) is coupled.
2. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
application as claimed in claim 1, wherein the first torch (02) and second torch
(05) are separately governed.
3. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
applications as claimed in claim 1, wherein the distance between the two torches
(02 and 05) may be altered.
4. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
applications as claimed in claim 1, wherein the twin cutting flames angle can be
individually adjusted to 60 degrees, towards any side form the torch’s vertical
position.
5. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
applications as claimed in claim 1, wherein a Single bevel edge preparation or
Double bevel angle cutting is also possible.

6. Semi-automatic machine with parallel twin torches (02 and 05) for cutting
applications, as substantially described and illustrated herein with reference to
the accompanying drawings.