Manufacturing technology I ME 8351 joining process DrPETERPRAKASH
This is very much useful for engineering students, Teachers and industrialist. Adequate knowledge of the concept and principles of welding and welding process used in various industries.
A simple slideshow of common welding process, welding terminology, welding symbols / joint configurations, welder related operations, and welding safety.
Gas Metal Arc Welding or MIG welding .
Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join
pulsed spray
globular spray
Gas Metal Arc welding is an arc welding process that uses an arc between a continuously-fed filler metal electrode and the weld pool.
Shielding from an externally supplied gas and without the application of a pressure.
It is also known as MIG welding (Metal Inert Gas) refers to the use of an inert gas while MAG (Metal Active Gas) welding involves the use of an active gas (i.e. carbon dioxide and oxygen).
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Manufacturing technology I ME 8351 joining process DrPETERPRAKASH
This is very much useful for engineering students, Teachers and industrialist. Adequate knowledge of the concept and principles of welding and welding process used in various industries.
A simple slideshow of common welding process, welding terminology, welding symbols / joint configurations, welder related operations, and welding safety.
Gas Metal Arc Welding or MIG welding .
Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join
pulsed spray
globular spray
Gas Metal Arc welding is an arc welding process that uses an arc between a continuously-fed filler metal electrode and the weld pool.
Shielding from an externally supplied gas and without the application of a pressure.
It is also known as MIG welding (Metal Inert Gas) refers to the use of an inert gas while MAG (Metal Active Gas) welding involves the use of an active gas (i.e. carbon dioxide and oxygen).
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
2. 2
GMAW Unit Topics
• During this overview, we
will discuss the following
topics:
• Safety
• GMAW Basics
• Equipment Set-Up
• Welding Variables
• Process Advantages and
Limitations
• AWS Connection
• National Academic
Standards Connection
3. 3
Unit Objectives
• Upon successful
completion of the GMAW
Unit of Study, you will
have learned about:
– Properly protecting
yourself and others while
welding
– Setting up and operating
GMAW equipment
– Striking and maintaining
an arc
– Welding in four positions
using various electrodes
– Weld Inspection
– The AWS electrode
classification system
– Taking the next step to
becoming a certified
welder
5. 5
GMAW Safety
• ‘GMAW Safety’ is supplemental
and does not replace the
information found in ‘Arc Welding
Basics’
• Understand and follow all safety
precautions listed in ‘Safety in
Welding, Cutting and Allied
Processes’ (ANSI Z49.1), and Arc
Welding Safety (E205)
• Understand and follow all warning
labels found:
– On welding equipment
– With all consumable packaging
– Within instruction manuals
• Read Material Safety Data Sheets
(MSDS)
If you ever have a question about your
safety or those around you,
PLEASE ASK YOUR INSTRUCTOR!
6. 6
GMAW Safety
• Fumes and Gases can be dangerous
– Keep your head out of the fumes
– Use enough ventilation, exhaust at the arc, or both, to keep fumes and gases
from your breathing zone and the general area
– Local exhaust and mechanical ventilation can be used without reducing weld
quality
• Electric Shock can kill – to receive a shock your body must touch the electrode
and work or ground at the same time
– Do not touch the electrode or metal parts of the electrode holder with skin or wet clothing
– Keep dry insulation between your body and the metal being welded or ground
– The coil of wire is ‘electrically hot’ when the trigger is pulled
• Arc Rays can injure eyes and skin -Choose correct filter shade (See chart below)
** Information taken from ANSI Z49.1:2005**
7. 7
GMAW Safety
• REMEMBER – Gas Cylinders require SPECIAL
safety precautions
– Cylinders must be secured in an upright position
– Cylinders should be located in an area away from arc
welding, cutting, heat, sparks, and flame
– Refer to ‘Safety in Welding, Cutting, and Allied Processes’
(ANSI Z49.1) or Arc Welding Safety (E205) for more
information on the handling of gas cylinders
9. 9
GMAW Definition
• GMAW stands for Gas Metal
Arc Welding
• GMAW is commonly referred
to as MIG or Metal Inert Gas
welding
• During the GMAW process, a
solid metal wire is fed through
a welding gun and becomes
the filler material
• Instead of a flux, a shielding
gas is used to protect the
molten puddle from the
atmosphere which results in a
weld without slag
GMAW is the most widely used arc welding process in the
United States
10. 10
GMAW Circuit
• Three things happen
when the GMAW gun
trigger is pulled:
– The wire electrode
begins to feed
– The circuit becomes
electrically ‘hot’
• Current flows from the power source through the gun cable,
gun, contact tip to the wire and across the arc. On the other
side of the arc, current flows through the base metal to the
work cable and back to the power source
– Shielding gas flows through the gun and out the nozzle
11. 11
GMAW Components
• Let’s look a little closer at the GMAW process
Travel direction
Electrode
1
Arc
2
Weld Puddle
3
Shielding Gas
4
5
Solidified Weld Metal
Generally, drag on thin sheet
metal and push on thicker
materials
12. 12
1 - Electrode
• A GMAW electrode is:
– A metal wire
– Fed through the gun by
the wire feeder
– Measured by its
diameter
GMAW electrodes are commonly
packaged on spools, reels and
coils ranging from 1lb to 1000lbs
13. 13
2 - Arc
• An electric arc
occurs in the gas
filled space between
the electrode wire
and the work piece
Electric arcs can generate
temperatures up to 10,000°F
14. 14
3 - Weld Puddle
• As the wire electrode
and work piece heat
up and melt, they
form a pool of molten
material called a weld
puddle
• This is what the
welder watches and
manipulates while
welding .045” ER70S-6 at 400 ipm wire feed
speed and 28.5 Volts with a 90%
Argon/ 10% CO2 shielding gas
15. 15
4 - Shielding Gas
• GMAW welding
requires a shielding
gas to protect the
weld puddle
• Shielding gas is
usually CO2, argon,
or a mixture of both
The gauges on the regulator show
gas flow rate and bottle pressure
16. 16
5 - Solidified Weld Metal
• The welder “lays a
bead” of molten metal
that quickly solidifies
into a weld
• The resulting weld is
slag free
An aluminum weld done
with the GMAW process
20. 20
GMAW Equipment Set Up
1. Connect work clamp
2. Select electrode
a. Type
b. Diameter
3. Select shielding gas
4. Turn power supply on
5. Adjust machine output
a. Wire feed speed
b. Voltage
6. Adjust gas flow rate
Why would GMAW be a better
choice than SMAW for this job?
21. 21
GMAW Process Variables
• Welding variables
– Wire Feed Speed (WFS)
– Voltage
• Operator controlled variables
– Travel speed
– Gun angles
– Contact tip to work distance
(CTWD)
– Gas flow rate
What is the relationship
between WFS and amperage?
23. 23
Striking an Arc
• Position the gun
over joint
• Position the face
shield to protect
eyes and face
• Pull the gun trigger
and begin welding
What are some things to
consider before striking an arc?
24. 24
Laying a Bead
The appearance of the puddle and
ridge where molten metal solidifies
indicates correct travel speed. The
ridge should be approximately 3/8”
(10 mm) behind the wire electrode.
Most beginners tend to weld too fast
resulting in a ropey bead which
means SLOW down!
• Maintain a Contact Tip to Work Distance (CTWD) of
3/8” to 1/2”
• Use a uniform travel speed
• Most Importantly – Watch the Puddle!
25. 25
Fill the Crater
• Fill the crater by pausing
or using a slight back
step
• Release gun trigger and
pull gun away from the
work after the arc goes
out
• Large craters can cause
weld cracking
Crater cracks cannot be
tolerated on NASCAR radiators.
26. 26
Restarting a Bead
• Restart the weld
bead by back
stepping into the
last weld’s crater
and then continue
moving forward
• This technique
should result in a
seamless
transition from one
weld to the next
2 Back step
1
28. 28
Modes of Metal Transfer
• GMAW is a process that
features several distinctive,
individual methods and types
of metal transfer
• The mode of metal transfer is
determined by a number of
welding variables
– Voltage
– Amperage
– Shielding Gas
• By changing one or more
variables, you can go from
one metal transfer mode to
another
29. 29
Modes of Metal Transfer
• Two common conventional
modes of metal transfer are:
– Short arc
– Axial spray arc
• The application, joint design,
base material thickness, and
properties determine the
appropriate mode to use
Typical short arc
application
Typical axial spray
arc application
30. 30
Short Arc Transfer
• In short arc transfer…
– The arc is initiated
and a droplet is
formed on the end of
the wire
– The wire touches the
work piece and
produces a short
circuit
– The droplet is then
transferred to the weld
puddle
31. 31
Axial Spray Arc Transfer
• In axial spray arc
transfer …
– Very high currents are
used
– A point forms at the
end of the electrode
and the fine droplets
– The puddle is very
fluid making out of
position welding
difficult
35. 35
Advantages of GMAW
• High operating factor
• Easy to learn
• Limited cleanup
• Use on many different
metals: stainless steel,
mild (carbon) steel,
aluminum and more
• All position
• Great for home use with
115V and 230V units
36. 36
Limitations of GMAW
• Less portable with
shorter gun lengths (15
foot guns)
• GMAW equipment is
more expensive than
SMAW equipment
• External shielding gas
can be blown away by
winds
• High radiated heat
• Difficult to use in out of
position joints
38. 38
ER70S-X
Electrode
Rod
70,000 psi Min. Tensile Strength
Solid
Chemistry, Amount of Deoxidizers (Silicon,
Manganese and/or Aluminum, Zirconium and
Titanium) X=2,3,4,6,7 or G
AWS Classification of
GMAW Electrodes
40. 40
GMAW Lesson #1
• Objective: To run a stringer (straight) bead using short arc transfer and to fill the
crater
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 3/16” or thicker
.035” SuperArc L-56 (ER70S-6)
100% CO2 or 25% CO2/ 75% Argon blend shielding gas
41. 41
GMAW Lesson #2
• Objective: To make a fillet weld on a lap joint in the horizontal position (AWS
position 2F)
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
2F
42. 42
GMAW Lesson #3
• Objective: To make a fillet weld on a tee joint in the horizontal position
(AWS position 2F)
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
2F
43. 43
GMAW Lesson #4
• Objective: To make a fillet weld on a lap joint in the vertical position welding
down (AWS position 3FD)
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
3FD
44. 44
GMAW Lesson #5
• Objective: To make a fillet weld on a tee joint in the vertical position welding down (AWS
position 3FD)
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
3FD
45. 45
GMAW Lesson #6
• Objective: To make a butt weld with a gap in the vertical position
welding down
• Equipment:
– Single Process - Constant Voltage Power Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
3G
46. 46
GMAW Lesson #7
• Objective: To make a fillet weld on a tee joint
in the overhead position (AWS position 4F)
• Equipment:
– Single Process - Constant Voltage Power
Source & Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – 10 gauge
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend
shielding gas
4F
47. 47
GMAW Lesson #8
• Objective: To make a three pass fillet weld on a tee
joint in the horizontal position (AWS position 2F)
• Equipment:
– Single Process - Constant Voltage Power Source
& Wire Feeder
Power MIG 215 or Power MIG 255C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package
• Material:
– Mild Steel Plate – ¼”
– .035” SuperArc L-56 (ER70S-6)
– 100% CO2 or 25% CO2/ 75% Argon blend shielding gas
2F
48. 48
GMAW Lesson #9
• Objective: To run a horizontal fillet weld on a tee joint using axial
spray transfer (AWS position 2F)
• Equipment:
– Single Process - Constant Voltage Power Source
& Wire Feeder
Power MIG 225C
– Multi-Process –
Composite: Power MIG 350 MP
Combination: V-350/ LF-72 package Material:
– Mild Steel Plate – ¼”
– .045” SuperArc L-56 (ER70S-6)
– 90% Argon/ 10% CO2 blend shielding gas
2F
50. 50
American Welding Society
(AWS) Connection
• The GMAW unit of study
covered information related
to the following AWS
requirements for
certification:
– Setting up for GMAW
operations on carbon steel
– Operating GMAW equipment
on carbon steel
– Making GMAW fillet welds on
carbon steel
52. 52
National Academic Standards
Crosswalk
• This unit covered academic content listed in the
National Academic Standards as follows:
– NM-MEA.9-12.1: Understands measurable attributes of objects
and the units, systems, and processes of measurement
– NM-PROB.CONN.PK-12.3: Recognizes and applies
mathematics in contexts outside of mathematics.
– NS-PHYSICAL SCIENCE: (Understands) structure and
property of matter
– NS-PHYSICAL SCIENCE: (Understands) chemical reactions
– NLA-STANDARD 3: Uses grammatical and mechanical
conventions in written compositions
– NLA-STANDARD 10: Understands the characteristics and
components of the media