This document provides an overview of arc welding basics. It introduces arc welding, discusses why welding is important and why one would want to learn to weld. It outlines careers in welding and the American Welding Society. It covers welding safety, basic electricity as it relates to welding, welding fundamentals and certification. The objectives are to learn welding terminology, demonstrate safe practices, understand welds and joints, interpret symbols, and learn about welding opportunities.
Welding is the most economical and efficient way to join metals permanently. It is the only way of joining two or more pieces of metal to make them act as a single piece. Welding is vital to our economy. Welding ranks high among industrial processes and involves more sciences and variables than those involved in any other industrial process. Welding is the joining of metals. What welding does is join metals or other materials at their molecular level with the technology we have at the moment.
More visit:- http://www.tradusway.com/electrical/welding.html/?p=2
Welding is the most economical and efficient way to join metals permanently. It is the only way of joining two or more pieces of metal to make them act as a single piece. Welding is vital to our economy. Welding ranks high among industrial processes and involves more sciences and variables than those involved in any other industrial process. Welding is the joining of metals. What welding does is join metals or other materials at their molecular level with the technology we have at the moment.
More visit:- http://www.tradusway.com/electrical/welding.html/?p=2
Practical Arc Flash Protection for Electrical Safety ProfessionalsLiving Online
Electrical safety is an important issue for those working on electrical facilities in utility networks and large industrial installations. A number of serious accidents including fatalities occur every year due to accidents involving electricity resulting in huge financial losses and wasted man-hours. Arc flashes in electrical equipment are now considered one of the major causes of electrical accidents even surpassing the well known hazards of electric shock. Avoiding arc flash incidents and the resulting injuries is one of major challenges today facing electrical workers and requires adequate attention in the stages of system planning, design, installation, operation and maintenance.
Injuries due to arc flash can depend on many factors, one of which is the incident thermal energy on a worker exposed to a flash. Today, a considerable body of knowledge exists as a result of research efforts and is available to designers and maintenance engineers in the form of standards such as IEEE 1584 and NFPA 70E. This workshop will detail the basis of this approach and also about the major advances that have been made in the area of PPE made of FR fabrics and rated for different levels of thermal exposure.
Prevention however still remains the best form of protection and switchgear manufacturers have made considerable design advances to ensure that the effect of arc flash incidents is contained within the enclosure of switchgear (often called arc flash resistant switchgear) and methods of testing such switchgear have also evolved simultaneously. Another important factor is the approach to avoid arc incidents within the switchgear by proper design and maintenance and techniques to reduce the severity of the flash should such incidents occur.
These would form the key focus areas of this workshop.
MORE INFORMATION: http://www.idc-online.com/content/practical-arc-flash-protection-electrical-safety-professionals-22
Symptoms like intermittent starting and key recognition errors signal potential problems with your Mercedes’ EIS. Use diagnostic steps like error code checks and spare key tests. Professional diagnosis and solutions like EIS replacement ensure safe driving. Consult a qualified technician for accurate diagnosis and repair.
Practical Arc Flash Protection for Electrical Safety ProfessionalsLiving Online
Electrical safety is an important issue for those working on electrical facilities in utility networks and large industrial installations. A number of serious accidents including fatalities occur every year due to accidents involving electricity resulting in huge financial losses and wasted man-hours. Arc flashes in electrical equipment are now considered one of the major causes of electrical accidents even surpassing the well known hazards of electric shock. Avoiding arc flash incidents and the resulting injuries is one of major challenges today facing electrical workers and requires adequate attention in the stages of system planning, design, installation, operation and maintenance.
Injuries due to arc flash can depend on many factors, one of which is the incident thermal energy on a worker exposed to a flash. Today, a considerable body of knowledge exists as a result of research efforts and is available to designers and maintenance engineers in the form of standards such as IEEE 1584 and NFPA 70E. This workshop will detail the basis of this approach and also about the major advances that have been made in the area of PPE made of FR fabrics and rated for different levels of thermal exposure.
Prevention however still remains the best form of protection and switchgear manufacturers have made considerable design advances to ensure that the effect of arc flash incidents is contained within the enclosure of switchgear (often called arc flash resistant switchgear) and methods of testing such switchgear have also evolved simultaneously. Another important factor is the approach to avoid arc incidents within the switchgear by proper design and maintenance and techniques to reduce the severity of the flash should such incidents occur.
These would form the key focus areas of this workshop.
MORE INFORMATION: http://www.idc-online.com/content/practical-arc-flash-protection-electrical-safety-professionals-22
Symptoms like intermittent starting and key recognition errors signal potential problems with your Mercedes’ EIS. Use diagnostic steps like error code checks and spare key tests. Professional diagnosis and solutions like EIS replacement ensure safe driving. Consult a qualified technician for accurate diagnosis and repair.
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"Trans Failsafe Prog" on your BMW X5 indicates potential transmission issues requiring immediate action. This safety feature activates in response to abnormalities like low fluid levels, leaks, faulty sensors, electrical or mechanical failures, and overheating.
𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
Over the 10 years, we have gained a strong foothold in the market due to our range's high quality, competitive prices, and time-lined delivery schedules.
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Comprehensive program for Agricultural Finance, the Automotive Sector, and Empowerment . We will define the full scope and provide a detailed two-week plan for identifying strategic partners in each area within Limpopo, including target areas.:
1. Agricultural : Supporting Primary and Secondary Agriculture
• Scope: Provide support solutions to enhance agricultural productivity and sustainability.
• Target Areas: Polokwane, Tzaneen, Thohoyandou, Makhado, and Giyani.
2. Automotive Sector: Partnerships with Mechanics and Panel Beater Shops
• Scope: Develop collaborations with automotive service providers to improve service quality and business operations.
• Target Areas: Polokwane, Lephalale, Mokopane, Phalaborwa, and Bela-Bela.
3. Empowerment : Focusing on Women Empowerment
• Scope: Provide business support support and training to women-owned businesses, promoting economic inclusion.
• Target Areas: Polokwane, Thohoyandou, Musina, Burgersfort, and Louis Trichardt.
We will also prioritize Industrial Economic Zone areas and their priorities.
Sign up on https://profilesmes.online/welcome/
To be eligible:
1. You must have a registered business and operate in Limpopo
2. Generate revenue
3. Sectors : Agriculture ( primary and secondary) and Automative
Women and Youth are encouraged to apply even if you don't fall in those sectors.
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2. 2
Unit Topics
• Topics included in this
overview are:
– Introduction
What is Arc Welding?
Why is Welding Important?
Why Learn to Weld?
– Careers in Welding
– The American Welding
Society (AWS)
– Welding Safety
– Basic Electricity
– Welding Fundamentals
– Welding Certification
3. 3
Objectives
• Upon successful completion of this unit of study, you will
be able to …
– Identify definitions and terminology associated with welding
– Demonstrate safe working habits in the welding environment
– Name the parts and types of welds and weld joints
– Interpret basic welding symbol information
– Identify opportunities available to welders
5. 5
What is Arc Welding?
• Arc welding is most commonly used to join two
pieces of metal
– The welder creates an electric arc that melts the
base metals and filler metal (consumable) together
so that they all fuse into one solid piece of metal
Steel Pipe – Tack
Welded
Root Pass or
“Stringer Bead”
Final weld after
several beads are
made
6. 6
Why is Welding Important?
• Many things around us are welded …
– Pipelines that bring fresh water
– Towers that carry electricity to houses
– Cars and buses that take people where they need to go
7. 7
Why Learn to Weld?
• Welding is so HOT …. it’s COOL!
– Welding can help build a successful career so you
can get the things you want in life
– Skilled welders are in demand – people use things
that are welded everyday!
– Welding can be fun and safe
– It is challenging and high-tech
8. 8
Basic Steps of Arc Welding
• Prepare the base materials: remove paint and rust
• Choose the right welding process
• Choose the right filler material
• Assess and comply with safety requirements
• Use proper welding techniques and be sure to protect
the molten puddle from contaminants in the air
• Inspect the weld
9. 9
The American Welding Society
• Who is the AWS?
– American Welding Society
– It is a non-profit organization whose membership includes:
Individuals
Students
Companies
• What do they do?
– Their purpose is to:
Advance the science, technology, and application of welding and allied
processes including: joining, brazing, soldering, cutting, and thermal spray
Standardize classification of electrode and base material codes
Standardize process procedures
Provide welding certification
11. 11
Careers in Welding
• Engineering
• Racing
• Industrial Sales
• Farm Repair and Fabrication
• Production Welding
• Military
• Teaching
• Maintenance
• Robotics
• Ironworker/ Skilled
Trades
• Auto Technician
• Artist
• Metal Sculpting
• Owning Your Own
Business
Job opportunities in welding are changing …
Welding can be valuable as a job skill or as a full-time job
For more information on welding careers, please see the e-
learning introduction
12. 12
How Much Money
Can You Make?
• Recent statistics show
that some welding jobs
pay $25.00 per hour
- If you worked five days a
week for one year, how
much money would you
make?
• 83% of people with
welding jobs were
offered medical benefits
- Higher than any other work
sector except government
For more information on welding statistics,
please log on to www.bls.gov
14. 14
Application Activity
• Let’s explore some career
possibilities in welding
• Please log on to a computer
• Working with a team member,
research the websites to the right
and explore information about
welding careers
• In 60 minutes, be prepared to
answer the following questions:
– What careers in welding interest you
the most?
– How can welding be high tech?
– How much money can be made
annually in this chosen career field?
– Where can you get a job in welding
and what are the basic requirements?
– What are some job advancement
opportunities available in the welding
industry?
• America's Job Bank
(http://www.ajb.dni.us)
• Classifieds Employment
(http://www.classifieds2000.com)
• Yahoo! Careers
(http://careers.yahoo.com/)
• MONSTER.COM
(http://www.monster.com)
(http://nccer.monster.com)
• CareerBuilder
(http://www.careerbuilder.com)
16. 16
• Welding can be safe when sufficient measures are
taken to protect yourself and others from potential
hazards
• Students should read and understand the following
before welding:
– Warning Labels
– Material Safety Data Sheets (MSDS)
• Students should also be familiar with the following
information
– ‘Safety in Welding, Cutting, and Allied Processes’ (ANSI Z49.1)
– Lincoln Electric’s ‘Arc Welding Safety’ (E205)
Arc Welding Safety
17. 17
Warning Labels
• Understand and
follow all warning
labels found:
– On welding equipment
– With all consumable
packaging
– Within instruction
manuals
18. 18
Material Safety Data Sheets
• Material Safety Data
Sheets (MSDS) are:
– Required by law and
OSHA
– Created by the
manufacturer of a product
per OSHA guidelines
– Designed to inform users
– Shipped with every box of
Lincoln Electric
consumable product
– Available free online at:
www.lincolnelectric.com/product
s/msds/
front
19. 19
MSDS - Continued
• MSDS outlines a
product’s:
Identity and
composition
Potential hazards
Safe use
Handling information
Manufacturer
contact information
back
20. 20
ANSI Z49.1
• ANSI Z49.1: Safety in Welding, Cutting, and Allied
Processes
– A safety document published by the American Welding Society that
covers safe practices in the welding environment
– To get your free copy, go to:
www.aws.org/technical/facts/Z49.1-2005-all.pdf
• E205: Arc Welding Safety
– A safety document summarizing many of the hazards and safe
practices for welding
– Download and print your own copy at:
http://content.lincolnelectric.com/pdfs/products/literature/e205.pdf
– Free copies available from Lincoln Electric at:
www.lincolnelectric.com/products/litrequest
• Access the E-learning Site @ www.agedlearning.com
21. 21
Arc Welding Safety
• Protect yourself and
others from potential
hazards including:
– Fumes and Gases
– Electric Shock
– Arc Rays
– Fire and Explosion
Hazards
– Noise
– Hot objects
22. 22
Fumes and Gases
• Fumes and gases can be
hazardous to your health
• 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
• See product labeling and
MSDS for ventilation and
respirator requirements
23. 23
Electric Shock
• Electric shock can kill
• Do not touch live electrical
parts
– Primary Voltage –230, 460
volt input power
– Secondary Voltage – 6 to
100 volts for welding
• Insulate yourself from
work and ground
• Follow all warnings on
welding equipment
Do not make repairs
yourself, alert your
instructor immediately!
24. 24
Arc Rays
• Arc rays can injure eyes and
burn skin
• The welding arc is brighter
than the sun
• Precaution must be taken to
protect your eyes and skin
from UV radiation
• Wear correct eye and body
protection
25. 25
Fire and Explosion Hazards
• Welding sparks can cause
fires and explosions
• Sparks and spatter from the
welding arc can spray up to
35 feet from your work
• Flammable materials should
be removed from the welding
area or shielded from sparks
and spatter
• Have a fire extinguisher ready
• Inspect area for fires 30
minutes after welding
26. 26
Noise
• Loud noises can damage your hearing
• Keep loud noises at a safe level by using proper
hearing protection such as:
– Ear plugs
– Ear muffs
27. 27
Protective Clothing
Welders must wear protective
clothing for
– Protection from sparks, spatter and UV
radiation
– Insulation from electric shock
• Protective clothing includes …
– Fire-proof clothing without rolled sleeves,
cuffs or frays
– Work boots
– Welding gloves, jackets, bibs, and fire-
proof pants
– Welding cap, helmet and safety glasses
– Ear protection – ear plugs and muffs
29. 29
Application Activity
• TIME TO PRACTICE
– Go out to the lab
– Demonstrate the use
of proper safety
precautions such as:
Reading warnings
Using proper protective
clothing
Equipment inspection
Keeping your head out
of the fume
Proper ventilation
31. 31
The Arc Welding Circuit
• The electricity flows
from the power
source, through the
electrode and across
the arc, through the
base material to the
work lead and back
to the power source
32. 32
Basic Electricity
• Voltage – The electrical
potential or pressure that
causes current to flow
– Measured in Volts
• Current – The movement
of charged particles in a
specific direction
– Measured in Amps
• Polarity
– DC- (Direct Current
Electrode Negative)
– DC+ (Direct Current
Electrode Positive)
– AC (Alternating Current)
DC+
DC -
AC
34. 34
Math Terms in Welding
• Believe it or not, a lot of math is used in welding
IPM Travel Speed = Inches per
Minute Travel Speed
The speed the electrode moves
along the base material
IPM Wire Feed Speed= Inches
per Minute Wire Feed Speed
The speed at which the wire is
fed during wire welding
Lbs/hr = Pounds per Hour Electrode deposition rate
CFH= Cubic Feet per Hour Shielding gas flow rate (wire
welding)
PSI= Pounds per Square Inch Tensile strength of a material and
the pressure in gas cylinders
L = Leg Fillet size measurement
% = percent Shielding gas mixture
composition
36. 36
Can All Metals Be Welded?
• Most metals can be welded, but not all
• The three most common weldable metals
include:
– Mild Steel - inexpensive and strong
– Stainless Steel – does not rust
– Aluminum – does not rust and is light weight
Mild steel Stainless Steel Aluminum
37. 37
Gauge
• Material thickness is sometimes measured by
gauge from 36 (.004 in) to 3 (.2391 in)
– For example, steel gauge and measurement in inches:
PLEASE NOTE: As the gauge number gets smaller … the material thickness gets larger.
16 gauge = .051” 14 gauge = .064” 12 gauge = .081” 10 gauge = .102”
41. 41
Parts of a Weld
Joint and Weld
Heat Affected Zone
42. 42
Fillet and Groove Welds
• Groove and fillet welds can be made on many
types of joints
43. 43
Fillet Weld Inspection
• Fillet welds should:
– Have a flat to slightly convex face
– Be uniform in appearance
– Have equal leg size
– Have good wash-in into base materials
• This is an example of a good fillet weld:
45. 45
What are Welding Symbols?
• Welding symbols give
the welder specific
instructions about the
weld including:
– Placement
– Size
– Length
– Process
– Any other special
notes
• Welding symbols are
– Universally used
– Governed by the AWS
– Found on engineering
drawings
“How to Read Shop Drawings”
available at www.jflf.org
46. 46
Welding Symbols
• Welding symbols contain information about the
weld to be made
– S – leg dimension of the weld
– Triangle – the weld is to be made on the arrow side of this joint
– Tail – any additional information required (i.e. position the weld
is to be made)
– Arrow - the joint the welding symbol applies to
50. 50
What are the
Responsibilities of a Welder?
• Welders have many areas of
important responsibilities
• These relate to:
– Arc Welding Safety
– Knowledge – Content
– Attitude – Reactions
– Skills – Performance
– Work Habits – Daily Functions
Always keep safety in
mind when welding
51. 51
Arc Welding Safety
• A welder MUST always follow safe work
practices:
– Students should read and understand the following before
welding:
Warning Labels
Material Safety Data Sheets (MSDS)
– Students should also be familiar with the following information
‘Safety in Welding, Cutting, and Allied Processes’ (ANSI Z49.1)
Lincoln Electric’s ‘Arc Welding Safety’ (E205)
52. 52
Knowledge - Content
• Welding can teach
you about….
– Science when applying
metallurgy, chemistry,
electricity, etc.
– Math when calculating
angles, joint design, and
weld size
– English when
communicating and
interpreting drawings,
codes, and procedures
– Technical areas when
performing the actual
welding applications
How much science and
math went into the
development of this bike?
53. 53
Attitude
• The best welders
demonstrate a can-do
attitude when performing
welding processes
• This means being able to…
– Work as a team member
– Communicate ideas to others
– Listen to opinions of others
– Promote a positive attitude
– Provide solutions to problems
– Take pride in workmanship
These welders work together
to inspect a weld.
54. 54
Skills/Performance
• A welder must
demonstrate technical
skills when performing
welding processes
• A welder must know how
to:
– Use hand tools and materials,
to operate equipment in a safe,
accurate, and consistent
manner
– Acquire and evaluate
information needed for
problem solving
– Complete quality work
– Maintain equipment
There is no room for poor
workmanship in NASCAR
55. 55
Work Habits/Daily Functions
• A welder must practice good
working habits when
performing welding
processes
• This means being able to …
– Follow detailed verbal and
written instructions
– Maintain workspace,
equipment, and tool
cleanliness
– Correctly fill out, maintain and
submit time cards, work
assignment cards, and other
records as required
– Follow safe working practices
Agriculture teachers brush
up on their welding skills at
Lincoln Electric’s Welding
Educator’s Workshop
57. 57
Welding Certification
• What is a welding certification?
– Welding certifications are used to test a welder’s knowledge and
welding skill
– Certifications are available for many different processes, materials, and
positions.
• Who certifies welders?
– Certification programs are offered by many different types of
organizations:
Companies
Skilled Trades
Military
Ship Builders
Pipelines
The American Welding Society
58. 58
Welding Certification
• How can you become certified?
– Certification testing is available at testing facilities all over the
United States
– The AWS offers many certifications including: welders, welding
inspectors, and welding educators
• What is the value of a welding certification?
– A welding certification proves that you have passed a test and are
qualified for the job
– As an AWS certified welder your name is kept in a national
database which is used to notify you of jobs open in your area
– It is a source of accomplishment and pride
60. 60
English, Math, and
Science Connection
• Many of the same concepts you learn in other
classes are practiced in welding. In what other
classes might you study the following terms?
75/25 – gas mixture
Volts
Amps
Degree/hr – cooling rate
In/min
Angles/degrees
Metallurgy
Fillet size
Current
Tension
Compression
Tensile strength
Yield
Blueprints
Depth/width ratio
Preheat temperature
Cubic feet per hour
61. 61
National Academic Standards
Crosswalk
• The unit just completed has covered parts of
academic content listed in the National
Academic Standards as follows:
– NM-PROB.CONN.PK-12.3: Recognizes and applies
mathematics in contexts outside of mathematics.
– NLA-STANDARD 1: Uses the general skills and strategies of
the writing process.
– NLA-STANDARD 7: Uses reading skills and strategies to
understand and interpret a variety of informational texts.
– NS-PHYSICAL SCIENCE: (Experiences) interactions of energy
and matter.