SMAW 11 Modue
SMAW 11 Modue
SMAW 11 Modue
AUTOMOTIVE SERVICING
Module 1: Weld carbon steel plate
Performing fillet welding on carbon steel plate
MEE721306
1st Semester, S.Y. 2020-2021
0
Performing fillet welding on carbon steel plate
MEE721306
Learning Outcomes: At the end of the lesson, the student shoul be able to:
1.Essentials of welding
2. International welding codes and standards
3. Acceptable weld profiles
4. Weld defects, causes and remedies
5. Welding Procedure Specifications (WPS)
6. Welding techniques and procedures
7. Safe welding practices
What I know
Read the questions carefully and select the best answer. Write
the letter of your answer on the space provided.
______1. It should be adjusted to give the proper type of flame for the particular metal
being welded.
A. Tip
B. Welding torch
C. Care
D. small puddle
_______2. By raising and lowering the welding flare with a slight circular motion while
progressing forward.
A. small puddle
B. narrow bead
C. tack welds
D. welding torch
_______3. The puddle and the base plate and rod are melted together.
A. Narrow bead
B. Bead weld
C. Tack weld
D. Welding rod
_______5. It should be moved slightly from side to side to obtain good fusion.
A. Narrow bead
B. Welding torch
C. Torch
D. Care
What’s In
1
Based on this topic what is 1F?
What’s New
Flat Position (1F)
The easiest type to perform is the flat position, which is also sometimes called
the down hand position. It involves welding on the top side of the joint. In this
position, the molten metal is drawn downward into the joint. The result is a faster and
easier weld.
In 1G and 1F, the number 1 refers to the flat position, while the letter G stands for a
groove weld and letter F stands for a fillet weld.
What is It
Flat Position Welding Procedures
In order to make satisfactory bead welds on a plate surface, the flare motion, tip
angle, and position of the welding flame above the molten puddle should be carefully
maintained.
The welding torch should be adjusted to give the proper type of flame for the particular
metal being welded.
Narrow bead welds are made by raising and lowering the welding flare with a
slight circular motion while progressing forward.
The tip should form an angle of approximately 45 degrees with the plate
surface. The flame will be pointed in the welding direction.
What’s More
Activity 2
Read the questions carefully and write your answer YES or NO on the separate of
paper. (copy and answer)
1. Deposit weld beads on plate?
2. Weld plates in single pass groove joints in flat positions (1F)
3. Weld plates in multiple pass groove joints in flat position
2
Several types of joints are used to make butt welds in the flat position.
Tack welds should be used to keep the plates aligned. The lighter sheets should
be spaced to allow for weld metal contraction and thus prevent warpage.
The following table should be used for selecting the number of passes in butt welding
steel plates:
Plate thickness, in. Number of passes 1/8 to 1/4 1 1/4 to 5/8 2 5/8 to 7/8
3 7/8 to 1-1/8
The position of the welding rod and torch tip in making a flat position butt joint
is shown in figure 11-13.
The motion of the flame should be controlled so as to melt the sidewalls of the
plates and enough of the welding rod to produce a puddle of the desired size.
By oscillating the torch tip, a molten puddle of a given size can be carried along the
joint. This will ensure both complete penetration and sufficient filler metal to provide
some reinforcement at the weld.
Care should be taken not to overheat the molten puddle. This will result in
burning the metal, porosity, and low strength in the completed weld.
This position is used in the flat welding position. It’s a fillet symbol.
You will see this used when you need to work with filler that has been rotated so it is
level with the ground.
This is also the easiest of all welding positions. This position is also called the
flat fillet position.
In a fillet weld, this joint will have a base plate that’s at an angle and a joint at a
similar angle, so that the joint itself is facing straight upwards, making your weld area
completely flat in between the plates being fused together.
Assessment
1. What should be spaced to allow for weld metal contraction and thus prevent
warpage?
2. What should be formed on the surface when making a bead weld with a welding
rod?
3. Which is also sometimes called the down hand position?
4. What should be taken not to overheat the molten puddle?
5. What should not be too large because this will cause the flame to burn through
the plate?
Learning Outcomes: At the end of the lesson, the student shoul be able to:
1. Essentials of welding
2. International welding codes and standards
3
3. Acceptable weld profiles
4. Weld defects, causes and remedies
5. Welding Procedure Specifications (WPS)
6. Welding techniques and procedures
7. Safe welding practices
What’s In
Activity 1
Identification: Fill in the blank answer it in separate of paper (copy and answer)
What’s New
What is It
You will end up risking burn through at the top of your joint
and having no penetration. You will need to work hard to master your technique if you
want an even and uniform beading on your joint.
4
Visually, this joint will have a base plate that is lying flat on the ground and the
plate being fused sticking straight up in the air, forming a T. Your weld will be at
about a 45-degree angle, because it will be nestled into that corner.
When welding in the 2G or 2F position it is necessary to control the weld puddle
and travel speed to produce a strong weld. The horizontal position is used widely in
agricultural sectors to make repairs.
The steps necessary to perform welds in the 2G or 2F position are: • Secure the
plate in a position for running beads in a straight line from left to right. Use adjustable
locking piers or C-clamps to secure the metal firmly. • When performing this type of
weld, the electrode and the plate sides should form a 90º angle. Lean the electrode
slightly in the direction of the weld area. • Adjust the amperage, travel speed, and arc
length to prevent the weld puddle from running or sagging. • Metal that is over 1/8-
inch-thick should be beveled prior to welding in the horizontal position. If welding
thicker metal, or metal that has been beveled, it is necessary to make more than one
weld pass to enhance the strength of the weld. • A root, filler, and cap pass will be
necessary.
What’s More
Activity 2
Answer the following questions briefly. Compare your response to the model answer
provided. Indicate whether your response is satisfactory or not satisfactory based on
your own judgment.
Satisfactory
Not Satisfactory
1. Performed lecture and demonstration
2. Trainees comprehension on the subject
3. Trainees performance on Weld carbon steel plates in horizontal position (2F)
Assessment
5
Competency-Based Learning Materials
SECTOR: METALS AND ENGINEERING
QUALIFICATION TITLE: SHIELDED METAL ARC WELDING NC I
UNIT OF COMPETENCY: WELD CARBON STEEL PLATES USING SMAW MODULE
TITLE: PERFORMING FILLET AND GROOVE WELDING ON CARBON
STEEL PLATE
MDM-SAGAY COLLEGE INC. National Highway, Brgy Pob.2 Sagay City, Neg. Occ.
6
MODULE CONTENT
Qualification Title: Shielded Metal Arc Welding NC I
Unit of Competency: Weld Carbon Steel Plates
Module Title: Performing fillet welding on carbon steel plates
Introduction This module covers the skills, knowledge and attitude required in
welding carbon steel plates in different positions such as 1F, 2F, 3F, & 4F using
SMAW process.
Learning Outcomes:
Upon completion of this module, the trainee/student must be able to:
LO.1. Weld carbon steel plates in flat position (1F)
LO.2. Weld carbon steel plates in horizontal position (2F)
LO.3. Weld carbon steel plates in vertical position (3F)
LO.4. Weld carbon steel pates in overhead position (4F)
ASSESSMENT CRITERIA:
1. Weld capping/ final pass not exceeding allowable tolerances specified by
welding codes/ standards on: • height of reinforcement • underfill • porosities •
undercut • cracks • cold laps
2. Uniformity of bead ripples must be in accordance with welding standards.
3. Stringer or layered beads deposited in accordance with welding standards
7
4. Finish weldment visually acceptable in accordance with welding standards for:
• spatters • arc strikes • slag • uniformity of beads
8
After the trainer’s evaluation and approval of the plate, you can proceed to the
next LO.
9
Narrow bead welds are made by raising and lowering the welding flare with a
slight circular motion while progressing forward.
The tip should form an angle of approximately 45 degrees with the plate surface.
The flame will be pointed in the welding direction.
Flat Position Narrow Bead Weld
To increase the depth of fusion, either increase the angle between the tip and
the plate surface, or decrease the welding speed.
The size of the puddle should not be too large because this will cause the flame
to burn through the plate.
A properly made bead weld, without filler rod, will be slightly below the upper
surface of the plate. A bead weld with filler rod shows a buildup on the surface.
10
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 10
of 55
Developed by:
Revision # 01
F
This position is used in the flat welding position. It’s a fillet symbol.
You will see this used when you need to work with filler that has been rotated so
it is level with the ground.
This is also the easiest of all welding positions. This position is also called the
flat fillet position.
In a fillet weld, this joint will have a base plate that’s at an angle and a joint at a
similar angle, so that the joint itself is facing straight upwards, making your
weld area completely flat in between the plates being fused together.
11
TASK SHEET 1.1-1 Title: Weld Carbon Steel Plates In Flat Position (1F)
Performance Objective:
Should be able to perform penetration, filling and capping to plates in flat
position
Supplies/Materials:
Electrode, welding mask, clear and dark glass, chipping hammer, steel brush,
mechanical pliers
Equipment: Welding machine (AC or AC/DC), welding table, portable grinder,
welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a flat position 4. Turn on the welding machine 5. Perform welding of carbon
steel plates in flat position 6. turn off the welding machine
Assessment Method: 1. Observation 2. Examination of plates
12
As an overall result, is your response satisfactory?
Satisfactory Not Satisfactory
Learning Outcome # 2:
WELD CARBON STEEL PLATES IN HORIZONTAL POSITION (2F)
CONTENTS: • Essentials of welding • International welding codes and standards •
Acceptable weld profiles • Weld defects, causes and remedies • Welding
Procedure Specifications (WPS) • Welding techniques and procedures • Safe
welding practices
ASSESSMENT CRITERIA: 1. Weld capping/ final pass not exceeding allowable
tolerances specified by welding codes/ standards on • height of reinforcement •
underfill • porosities • undercut • cracks • cold laps 2. Uniformity of bead ripples
must be in accordance with welding standards 3. Stringer or layered beads
deposited in accordance with welding standards 4. Finish weldment visually
acceptable in accordance with welding standards for: • spatters • arc strikes •
slag • uniformity of beads
CONDITIONS: Students/trainees must be provided with the following: •
Equipment - GMAW Welding machine (AC/DC) - Welding table or jig - Portable
grinder - Welding booth • Tools/Accessories - Welding mask
13
of 55
Developed by:
Revision # 01
- Steel brush - Clear glass - Chipping hammer - Dark glass • Supplies/
Materials - MIG wire - Carbon steel plates - Cutting grinding disk - Shielding
gases • Personal protective equipment - Safety shoes - Apron - Leggings -
Safety goggles - Gloves • Training Materials - GMAW welding manuals - Welding
procedures specifications (WPS) - Welding standards
ASSESSMENT METHODS: Direct observation Visual examination of plates
LEARNING ACTIVITIES
Learning Activities Specific Instruction
14
INFORMATION SHEET NO. 1.1-2
Weld carbon steel plates in horizontal position (2F)
Horizontal Welding (2F)
This is another fillet weld position, but it is used in horizontal welding.
If you are using this position then you will need to use the top side of a
horizontal surface for welding.
The surface will be lying against another vertical surface. When you weld from
this position, your torch’s angle will need to be 45 degrees.
When your filler weld is rotated in such a way that your filler material is
horizontal to the ground, then you will need to use this position.
It’s harder to use because your molten weld pool is going to try to move
downwards and hit the ground. It will be difficult to prevent your joint from
being uneven and having the filler metal pool at the bottom of your joint.
On top of that, your heat will end up moving upward to the top of the joint. With
the metal flowing downward and the heat rising upward, it can be very easy to
mess up this weld.
15
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 19
of 55
Developed by:
Revision # 01
TASK SHEET 1.1-2 Title: Weld Carbon Steel Plates In Horizontal Position (2F)
Performance Objective:
Should be able to perform penetration, filling and capping to plates in horizontal
position
Supplies/Materials: Electrode, welding mask, clear and dark glass, chipping
hammer, steel brush, mechanical pliers Equipment: Welding machine (AC or
AC/DC), welding table, portable grinder, welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a horizontal position 4. Turn on the welding machine 5. Perform welding of
carbon steel plates in horizontal position 6. turn off the welding machine
Assessment Method: 1. demonstration 2. observation
16
Direction: Answer the following questions briefly. Compare your response to the
model answer provided. Tick on the box to indicate whether your response is
satisfactory or not satisfactory based on your own judgment.
Satisfactory
Satisfactory
1. Performed lecture and demonstration
2. Trainees comprehension on the subject
3. Trainees performance on Weld carbon steel plates in horizontal position (2F)
17
Page | 22
of 55
Developed by:
Revision # 01
- Steel brush - Clear glass - Chipping hammer - Dark glass • Supplies/
Materials - MIG wire - Carbon steel plates - Cutting grinding disk - Shielding
gases • Personal protective equipment - Safety shoes - Apron - Leggings -
Safety goggles - Gloves • Training Materials - GMAW welding manuals - Welding
procedures specifications (WPS) - Welding standards
ASSESSMENT METHODS: Direct observation Visual examination of plates
18
Weld carbon steel plates in vertical position (3F)
Vertical Welding
3F
This is a vertical fillet welding position. You will use this position to weld any
time your weld position has the filler material vertical with the ground.
This position allows you to weld uphill, using your position to counteract the
effects of gravity on your weld. It’s pretty hard compared to 1F and 2F positions.
In this position, you have one base metal plate that is against a wall, and
another that is moving out of it at a perpendicular angle, but instead of laying
down it is straight up and down like a door hinge or a wall sconce.
You will be filling metal in at a 45-degree angle in the corner that joint forms,
but it will be up and down rather than flat.
There are two basic techniques for performing welds in the vertical position.
These two techniques are commonly referred to as “vertical
19
Date Developed:
Date Revised:
Issued by:
Page | 26
of 55
Developed by:
Revision # 01
accordingly. When welding thick plate, use one or more side-to-side electrode
movements.
As with fillet welds, “vertical up” and “vertical down” welds will need more than
one pass. A root pass should be made, along with a filler and cap pass.
20
Developed by:
Revision # 01
Performance Criteria Checklist 1.1-3
CRITERIA
YES NO
1. deposit weld beads on plate? 2. weld plates in single pass groove joints in
vertical positions (3F) 3. weld plates in multiple pass groove joints in vertical
position (3F)
SELF-CHECK NO. 1.3-1
Is your response is satisfactory?
Direction: Answer the following questions briefly. Compare your response to the
model answer provided. Tick on the box to indicate whether your response is
satisfactory or not satisfactory based on your own judgment.
Satisfactory
Satisfactory
1. Performed lecture and demonstration
2. Trainees comprehension on the subject
3. Trainees performance on Weld carbon steel plates in vertical position (3F)
21
Learning Outcome # 4:
WELD CARBON STEEL PLATES IN OVERHEAD POSITION (4F)
CONTENTS: • Essentials of welding • International welding codes and standards •
Acceptable weld profiles • Weld defects, causes and remedies • Welding
Procedure Specifications (WPS) • Welding techniques and procedures • Safe
welding practices
ASSESSMENT CRITERIA: 9. Weld capping/ final pass not exceeding allowable
tolerances specified by welding codes/ standards on • height of reinforcement •
underfill • porosities • undercut • cracks • cold laps 10. Uniformity of bead
ripples must be in accordance with welding standards 11. Stringer or layered
beads deposited in accordance with welding standards 12. Finish weldment
visually acceptable in accordance with welding standards for: • spatters • arc
strikes • slag • uniformity of beads
CONDITIONS: Students/trainees must be provided with the following: •
Equipment - GMAW Welding machine (AC/DC) - Welding table or jig - Portable
grinder - Welding booth • Tools/Accessories - Welding mask
22
Issued by:
Page | 30
of 55
Developed by:
Revision # 01
- Steel brush - Clear glass - Chipping hammer - Dark glass • Supplies/
Materials - MIG wire - Carbon steel plates - Cutting grinding disk - Shielding
gases • Personal protective equipment - Safety shoes - Apron - Leggings -
Safety goggles - Gloves • Training Materials - GMAW welding manuals - Welding
procedures specifications (WPS) - Welding standards
ASSESSMENT METHODS: Direct observation Visual examination of plates
23
INFORMATION SHEET NO. 1.4
Weld carbon steel plates in overhead position (3F)
Overhead Welding
This is an overhead welding position.
Welding in the 4G or 4F position is the most difficult of the out-of- position
welds. The major challenge in this type of welding is controlling the weld puddle.
The procedures for performing overhead welds are very similar to the flat
position, except that they are far more difficult. It is necessary to pay special
attention to the weld puddle and travel speed. You must maintain a short arc as
well. The steps in overhead welding are: Secure the metal overhead with the use
of an adjustable locking pliers or C-clamps. Find a position that is comfortable
for you before starting to weld. Welding in the 4G or 4F position is much more
difficult if the welder is uncomfortable from the start. Adjust the amperage
setting and travel speed. The amperage should be set at approximately the same
setting as needed during vertical welding (3). Be certain to maintain a very short
arc length throughout the entire process. Weld with a short arc and use a
moderately fast rate of travel to prevent sagging and undercutting.
24
Performance Objective: Should be able to perform penetration, filling and
capping to plates in overhead position
Supplies/Materials: Electrode, welding mask, clear and dark glass, chipping
hammer, steel brush, mechanical pliers Equipment: Welding machine (AC or
AC/DC), welding table, portable grinder, welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a flat position 4. Turn on the welding machine 5. Perform welding of carbon
steel plates in overhead position 6. turn off the welding machine
Assessment Method: 1. demonstration 2. observation
25
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 36
of 55
Developed by:
Revision # 01
MODULE CONTENT
Qualification Title : Shielded Metal Arc Welding NC I
Unit of Competency : Weld Carbon Steel Plates
Module Title : Preparing Groove Welding on Carbon Steel Plates
Introduction This module covers the skills, knowledge and attitude required in
welding carbon steel plates in different positions such as 1G, 2G, 3G, using
SMAW process.
Learning Outcomes:
Upon completion of this module, the trainee/student must be able to:
LO.1. Weld carbon steel plates in flat position (1G)
LO.2. Weld carbon steel plates in horizontal position (2G)
LO.3. Weld carbon steel plates in vertical position (3G)
26
Issued by:
Page | 37
of 55
Developed by:
Revision # 01
Learning Outcome # 1:
WELD CARBON STEEL PLATES IN FLAT POSITION (1G)
CONTENTS: 1. Essentials of welding 2. International welding codes and
standards 3. Acceptable weld profiles 4. Weld defects, causes and remedies 5.
Welding Procedure Specifications (WPS) 6. Welding techniques and procedures 7.
Safe welding practices ASSESSMENT CRITERIA: 1. Root penetration not
exceeding allowable tolerances specified by welding codes/ standards on -
concavity - convexity - undercut - excess penetration - lack of fusion - burn-
through - cracks 2. Weld capping/ final pass not exceeding allowable tolerances
specified by welding codes/ standards on - height of reinforcement - underfill -
porosities - undercut - cracks - cold laps 3. Uniformity of bead ripples must be in
accordance with welding standards 4. Stringer or layered beads deposited in
accordance with welding standards 5. Finish weldment visually acceptable in
accordance with welding standards for: - spatters - arc strikes - slag - uniformity
of beads
27
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 39
of 55
Developed by:
Revision # 01
Learning Experiences
Learning Activities Specific Instruction 1. READ INFORMATION SHEET NO. 1.2-1
on LAWS Code After reading INFORMATION SHEET NO. 1.2-1 proceed to Task
Sheet 1.2-1
2. Perform Task Sheet 1.1-1 Weld Carbon Steel Plates In Flat Position
After performing Weld Carbon Steel Plates In Flat Position, Let the trainer
evaluate your work.
After the trainer’s evaluation and approval of the plate, you can proceed to the
next LO.
28
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 41
of 55
Developed by:
Revision # 01
TASK SHEET 1.2-1 Title: Weld Carbon Steel Plates In Flat Position (1G)
Performance Objective:
Should be able to perform penetration, filling and capping to plates in flat
position
Supplies/Materials:
Electrode, welding mask, clear and dark glass, chipping hammer, steel brush,
mechanical pliers
Equipment: Welding machine (AC or AC/DC), welding table, portable grinder,
welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a flat position 4. Turn on the welding machine 5. Perform welding of carbon
steel plates in flat position 6. turn off the welding machine
Assessment Method: 1. Observation 2. Examination of plates
29
Is your response is satisfactory?
Direction: Answer the following questions briefly. Compare your response to the
model answer provided. Tick on the box to indicate whether your response is
satisfactory or not satisfactory based on your own judgment.
Satisfactory
Satisfactory
4. Performed lecture and demonstration
5. Trainees comprehension on the subject
6. Trainees performance on Weld carbon steel plates in flat position
30
Welding Procedure Specifications (WPS) 6. Welding techniques and procedures 7.
Safe welding practices ASSESSMENT CRITERIA: 1. Root penetration not
exceeding allowable tolerances specified by welding codes/ standards on -
concavity - convexity - undercut - excess penetration - lack of fusion - burn-
through - cracks 2. Weld capping/ final pass not exceeding allowable tolerances
specified by welding codes/ standards on - height of reinforcement - underfill -
porosities - undercut - cracks - cold laps 3. Uniformity of bead ripples must be in
accordance with welding standards 4. Stringer or layered beads deposited in
accordance with welding standards 5. Finish weldment visually acceptable in
accordance with welding standards for: - spatters - arc strikes - slag - uniformity
of beads
CONDITIONS: Students/trainees must be provided with the following: •
Equipment
31
Learning Activities Specific Instruction 1. Read information sheet no. 1.2-2 on
weld carbon steel plates in horizontal position (2g) After reading INFORMATION
SHEET NO. 1.2-2 proceed to Task Sheet 1.2-2
2. Perform Weld Carbon Steel Plates In Horizontal Position
After performing Weld Carbon Steel Plates In Horizontal Position, Let the trainer
evaluate your work.
After the trainer’s evaluation and approval of the plate, you can proceed to the
next LO.
32
Revision # 01
TASK SHEET 1.2-2 Title: Weld Carbon Steel Plates In Horizontal Position (2G)
Performance Objective:
Should be able to perform penetration, filling and capping to plates in horizontal
position
Supplies/Materials: Electrode, welding mask, clear and dark glass, chipping
hammer, steel brush, mechanical pliers Equipment: Welding machine (AC or
AC/DC), welding table, portable grinder, welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a horizontal position 4. Turn on the welding machine 5. Perform welding of
carbon steel plates in horizontal position 6. turn off the welding machine
Assessment Method: 1. demonstration 2. observation
33
As an overall result, is your response satisfactory?
Satisfactory Not Satisfactory
Learning Outcome # 3:
WELD CARBON STEEL PLATES IN VERTICAL POSITION (3G)
CONTENTS: 1. Essentials of welding 2. International welding codes and
standards 3. Acceptable weld profiles 4. Weld defects, causes and remedies 5.
Welding Procedure Specifications (WPS) 6. Welding techniques and procedures 7.
Safe welding practices ASSESSMENT CRITERIA: 1. Root penetration not
exceeding allowable tolerances specified by welding codes/ standards on -
concavity - convexity - undercut - excess penetration - lack of fusion - burn-
through - cracks 2. Weld capping/ final pass not exceeding allowable tolerances
specified by welding codes/ standards on - height of reinforcement - underfill -
porosities - undercut - cracks - cold laps 3. Uniformity of bead ripples must be in
accordance with welding standards 4. Stringer or layered beads deposited in
accordance with welding standards 5. Finish weldment visually acceptable in
34
accordance with welding standards for: - spatters - arc strikes - slag - uniformity
of beads
35
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 52
of 55
Developed by:
Revision # 01
INFORMATION SHEET NO. 1.2-3
Vertical Welding There are two basic techniques for performing welds in the
vertical position. These two techniques are commonly referred to as “vertical
up” and “vertical down.” These two techniques can be used to perform welds in
the 3G and 3F positions. The following is a set of instructions for performing
“vertical up” and “vertical down” welds. For most welders, light metal is easier
to weld than heavy metal because it requires less penetration. Be certain that
the metal plate is secured in a vertical position. The use of adjustable locking
pliers or C-clamps is recommended to aid in securing the metal in position.
Position the electrode at an angle of 60º to the plate and in the path of the weld.
The electrode should be perpendicular to the sides of the plate. For “vertical
down” welding, begin at the top of the plate with a short arc. If the electrode
sticks, stop and increase the amperage. If the electrode burns through the metal,
lower the amperage. If the electrode continues to burn through the metal,
increase the speed of the electrode movement downward.
When welding “vertical up”, position the electrode 85º to the plate in the path
of the weld. Begin at the bottom of the plate and work up.
36
SHIELDED METAL ARC WELDING NC I
Date Developed:
Date Revised:
Issued by:
Page | 54
of 55
Developed by:
Revision # 01
TASK SHEET 1.2-3 Title: Weld Carbon Steel Plates In Vertical Position (3G)
Performance Objective: Should be able to perform penetration, filling and
capping to plates in vertical position
Supplies/Materials: Electrode, welding mask, clear and dark glass, chipping
hammer, steel brush, mechanical pliers Equipment: Welding machine (AC or
AC/DC), welding table, portable grinder, welding booth, portable oven
Steps/Procedure: 1. Wear PPE 2. Prepare the base metal. 3. Place the base metal
in a vertical position 4. Turn on the welding machine 5. Perform welding of
carbon steel plates in vertical position 6. turn off the welding machine
Assessment Method: 1. demonstration 2. observation
37
Direction: Answer the following questions briefly. Compare your response to the
model answer provided. Tick on the box to indicate whether your response is
satisfactory or not satisfactory based on your own judgment.
Satisfactory
Satisfactory
4. Performed lecture and demonstration
5. Trainees comprehension on the subject
6. Trainees performance on Weld carbon steel plates in flat position
38