welding,Plasma arc welding,Plasma,,Pilot Arc ,Keyhole,Weld bead geometry ,Transferred plasma arc welding process,India,Small Part Welding
Sealed Components
Tool Die & Mold Repair
Tube Mill Welding
Long Strip Metal Welding
Non-transferred plasma arc welding process,Two Modes of operation in PAW,. Melt – In mode
Keyhole mode
conduction mode
,Effect of Various Factors on weld Quality Nozzle shape and size , Features of Plasma Arc Welding,Advantages of Plasma Arc Welding,Disadvantages of Plasma Arc Welding,Application of Plasma Arc Welding
Instability of the keyhole
Tungsten electrode set-back
Composition and flow rate of the plasma gas
Tezpur University
Electron Beam Welding is a fusion welding process in which a beam of high-velocity electrons is applied to the material to be joined. The work-piece melt as the kinetic energy of the electrons is transformed into heat upon impact. The EBW process is well-positioned to provide industries with highest quality welds and machine designs that have proven to be adaptable to specific welding tasks and production environments.
Arc welding process that produces coalescence of metals by heating them with a constricted arc between an electrode and the work piece (transferred arc) or between the electrode and the water-cooled constricting nozzle (non transferred arc) .
Plasma: A gaseous mixture of positive ions, electrons and neutral gas molecules
One of the welding processes that used in Engineering field is the plasma arc welding. There are several types of welding processes similar to this, but plasma arc welding has its unique features.
Thanks for the colleagues who give this slides to publish.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
Electron Beam Welding is a fusion welding process in which a beam of high-velocity electrons is applied to the material to be joined. The work-piece melt as the kinetic energy of the electrons is transformed into heat upon impact. The EBW process is well-positioned to provide industries with highest quality welds and machine designs that have proven to be adaptable to specific welding tasks and production environments.
Arc welding process that produces coalescence of metals by heating them with a constricted arc between an electrode and the work piece (transferred arc) or between the electrode and the water-cooled constricting nozzle (non transferred arc) .
Plasma: A gaseous mixture of positive ions, electrons and neutral gas molecules
One of the welding processes that used in Engineering field is the plasma arc welding. There are several types of welding processes similar to this, but plasma arc welding has its unique features.
Thanks for the colleagues who give this slides to publish.
Welding process
Arc Welding
Resistance Welding
Oxy fuel Gas Welding
Other Fusion Welding Processes
Solid State Welding
Weld Quality
Weld ability
Design Considerations in Welding
One of the welding processes that used in Engineering field is the electron beam welding. There are several types of welding processes similar to this, but electron beam welding has its unique features.
Thanks for the colleagues who give this slides to publish.
What is MIG welding?
Working process
Process Parameters
Advantages
Limitations
Applications
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together.
A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
In fact, MIG stands for “Metal Inert Gas”. The technical name for it is "Gas Metal Arc Welding" (or GMAW).
One of the welding processes that used in Engineering field is the explosion welding. There are several types of welding processes similar to this, but explosion welding has its unique features.
Thanks for the colleagues who give this slides to publish.
Basic knowledge of Gas Tungsten Arc Welding (GTAW) for freshers in the field. This is one of the welding process that produces one of the highest quality of weld for high integrity structures...
One of the welding processes that used in Engineering field is the electrogas welding. There are several types of welding processes similar to this, but electrogas welding has its unique features.
Thanks for the colleagues who give this slides to publish.
friction stir welding is a joining process that has exhibited many advantages over traditional welding process including greatly reducing distortion and eliminating solidification. In this process welding using fiction as the major resource, due to the frictional heating & Mechanical deformation
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
This project are for understanding the working, advantages and disadvantages of plasma arc welding, the viewers can also use it for their needful purpose.
One of the welding processes that used in Engineering field is the electron beam welding. There are several types of welding processes similar to this, but electron beam welding has its unique features.
Thanks for the colleagues who give this slides to publish.
What is MIG welding?
Working process
Process Parameters
Advantages
Limitations
Applications
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together.
A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
In fact, MIG stands for “Metal Inert Gas”. The technical name for it is "Gas Metal Arc Welding" (or GMAW).
One of the welding processes that used in Engineering field is the explosion welding. There are several types of welding processes similar to this, but explosion welding has its unique features.
Thanks for the colleagues who give this slides to publish.
Basic knowledge of Gas Tungsten Arc Welding (GTAW) for freshers in the field. This is one of the welding process that produces one of the highest quality of weld for high integrity structures...
One of the welding processes that used in Engineering field is the electrogas welding. There are several types of welding processes similar to this, but electrogas welding has its unique features.
Thanks for the colleagues who give this slides to publish.
friction stir welding is a joining process that has exhibited many advantages over traditional welding process including greatly reducing distortion and eliminating solidification. In this process welding using fiction as the major resource, due to the frictional heating & Mechanical deformation
Welding Defects
Eurotech Now inteducing Welding Defects. Welding Defect is any type of flaw in the object which requires welding. Seven type of Welding Defect
Seven type of Common weld defects include:
1. Lack of fusion
2. Lack of penetration or excess penetration
3. Porosity
4. Inclusions
5. Cracking
6. Undercut
7. Lamellar tearing
Any of these defects are potentially disastrous as they can all give rise to high stress intensities which may result in sudden unexpected failure below the design load or in the case of cyclic loading, failure after fewer load cycles than predicted.
This project are for understanding the working, advantages and disadvantages of plasma arc welding, the viewers can also use it for their needful purpose.
Plasma welding is a advanced welding process . It can be used in automatic welding systems for high quality welding requirements . It has benefits of .welding at high speed, greater penetration, narrow HAZ (heat affected zone) and minimum heat input to the job.
Working of Laser beam machining process. Its one kind of non traditional or advanced manufacturing process.Production of laser beam and with the use of lasers how can material can be removed is to be explained over here...
Ekeeda Provides Online Video Lectures for Mechanical Engineering Degree Subject Courses for All Engineering Universities. Visit us: https://ekeeda.com/streamdetails/stream/mechanical-engineering
Micro Plasma welding is used for precision welding of small components . It is a advanced welding process and can be easily automated . It can maintain a arc at a current as low as 0.1 amp and can weld sheets as this as 100 microns .
i have made a presentation on welding and welding transformer, here i included types of weldings and their advantages and types of welding transformer and their working, construction, application, advantages..
Mig welding process is semi automatic when used for manual welding . It can be used in welding automation systems for high quality welds and high productivity.
Detailed explanation of Plasma arc machining, equipment of plasma arc machining, working of plasma arc machining, construction of plasma arc machining , modes of plasma gun , appliaction of PAM, Advantages of PAM, Disadvantages of PAM and some Youtube Links of PAM
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
2. Content
Introduction
Keywords
Plasma arc welding
Equipment
How it works ?
Types of PAW & modes of operation
Effect of Various Parameter
Advantage and Disadvantage
Application
3. Introduction
Introduced to welding industry in 1964
Method of bringing better control to arc
welding process in lower current ranges
PAW brought to industry by providing an
advanced level of control and accuracy to
produce high quality welds
Provide long electrode life for high
production requirements
used in a variety of operations ranging from
high volume welding of strip metal
4. Keywords
Plasma : A gas heated to a very high temperature
and ionized so that it becomes conductive.
Pilot Arc : First arc between between electrode &
constricting nozzle.
Keyhole : A welding technique in which a concentrated
heat source penetrates the WP forming a hole at the
leading edge of the molten weld metal
Sinter : Integrate into a solid or porous mass by means
of heating.
Weld bead geometry :
5. Plasma Arc Welding
Equipment
Power Source : Open circuit
voltage of 80 volts
Current – (50 – 300A )
A dc welding current is required .
A welding torch -Non
consumable tungsten electrode
A cooling system : Water re-
circulator
Plasma Welding Torch
Plasma Gas : Argon
Shielding Gas : Argon,
Argon/Hydrogen or Helium
6. How it works ?
The tungsten electrode has a negative polarity
and the work-piece a positive polarity. Electrons
flow to the WP.
Plasma consists of electrons, ions and neutral
particles and have disorder violent movement.
So molecule are partly dissociated and the
atoms ionized.
On collision with WP surface they give their
energy to the WP and recombine.
The jet deliver a narrow & constricted plasma
with a very high energy density.
7. o Arc is established between
electrode and WP.
o Arc is established between
electrode and nozzle.
o The WP is part of the electrical
circuit and heat is obtained
from the anode spot and the
plasma jet. Therefore, higher
amount of energy is transferred
to work.
o The WP is not part of the
electrical circuit and heat is
obtained from the plasma jet.
Therefore, less energy is
transferred to work.
o Higher penetration is obtained,
so thicker sheets can be
welded.
o Less penetration is obtained, so
thin sheets can be welded.
o Higher process efficiency. o Less process efficiency.
Two types of Plasma Arc Welding
Transferred plasma arc welding
process
Non-transferred plasma arc
welding process
8. Two Modes of operation in PAW
1. Melt – in mode : When energy is transferred to WP
from plasma arc the energy strike the surface and
immediately causes heating.
It is due to the combination of conduction of heat
in the arc and conversion of kinetic energy.
If the rate at which energy is being deposited
exceeds the rate at which heat is being conducted
away, the temperature will rise and cause melting
and produce a fusion weld. This mode of energy
deposition and weld production is called the melt-
in mode or the conduction mode
1. Melt – In mode 2. Keyhole mode
9. 2. Keyhole Mode : If the density of the energy coming
from the plasma arc is very high , such that the
deposition rate exceeds the rate at which it is lost by
conduction into the WP .
In this case, the plasma arc can penetrate the molten
pool and form a small throughout hole in the weld pool,
refer as the keyhole.
Moving the welding torch and the associated keyhole
will cause the flow of the molten metal surrounding the
keyhole to the rear region where it re-solidifies to form
a weld bead. This is the keyhole mode in PAW
Keyhole mode produces larger penetration than the melt-in mode.
10. Effect of Various Factors on weld Quality
Instability of the keyhole : It lead weld discontinuities
such as excessive penetration and incomplete penetration.
Nozzle shape and size : Nozzle constrict the plasma jet
stream & focusing the heat on WP.
Tungsten electrode set-back : Distance between the
end of the electrode and the nozzle exit & It has has a
significant effect on weld bead formation and arc
penetration.
Composition and flow rate of the plasma gas : It
have strong effect on the behaviour of the weld pool ,
on the appearance of the weld, on the welding speed
and on the weld defects.
11. Welding current : Weld joint will be best if a low
plasma gas flow rate and a high welding current are used.
Welding speed : too high welding speed will result in
undercutting and incomplete penetration while inadequate
welding speed leads to excessive penetration so highest
possible welding speed is desirable economically .
Distance from the nozzle to the workpiece : too
small height will lead to narrow weld and undercut while
too high one will affect the arc penetration and the welding
quality. Appropriate distance is 3–12 mm.
Effect of plasma gas on the weld quality of plasma arc
welding is more important than that of shielding gas
12. Features of Plasma Arc Welding
Protected electrode
Low amperage welding capability (as low as 0.05 amp)
Arc consistency & gentle arc starting.
Minimal high frequency noise issues, HF only in pilot arc
start, not for each weld.
Arc energy density reaches 3 times that of GTAW. Higher
weld speeds possible
Weld times as short as 0.005 secs.
Length of arc benefit due to arc shape and even heat
distribution
Diameter of arc chosen via nozzle orifice
13. Advantages of Plasma Arc Welding
Control and quality : Torch design allows for better
control of the arc.
More Freedom During Manual Welds : Torch-to-
work distance from the plasma arc is less critical than GTAW.
So more freedom to observe and control the weld.
Faster Travel Speeds: The higher heat concentration and
the plasma jet allow for higher travel speeds.
Keyhole Effect : High temperature and high heat
concentration of plasma allow for the keyhole effect, which
provides complete penetration single pass welding of many
joints.
Lesser angular distortion : Heat-affected zone is smaller
than with the GTAW So weld have more parallel sides,
14. Disadvantages of Plasma Arc Welding
Greater heat input : It produces wider welds and heat-
affected zones than LBW and EBW This may result in
more distortion and loss of mechanical properties
Complex and costly : High start up costs and . Plasma
welding equipment are very expensive.
More specialized welding process : Training and
expertise required is also more intense.
Gives out ultraviolet and infrared radiation.
Operation produces a high noise of the order of 100dB
Bulkiness of the torch : It makes manual welding
more difficult.
15. Application of Plasma Arc Welding
Small Part Welding : PAW process can consistently
start an arc to the tip of wires or other small components
and make repeatable welds with very short weld time
periods.
such as needles, wires, light bulb filaments, thermocouples
Sealed Components : Medical and electronic
components are sealed via this welding
Tool Die & Mold Repair : Micro-plasma welding
processes are used for tool, die and mold repair.
Tube Mill Welding : Output of the tube mill depends on
the arc welding speed and total time spent welding
Long Strip Metal Welding