WELDING CLASSES LECTURE

Week

Term

Content of Lecture

1

Theory

INTRODUCTION TO WELDING

-Welding: - Fusion welding & Pressure welding

Theory and Practical

GAS WELDING PROCESS -Introduction

I.          High pressure system.

II.        Low pressure system.

EQUIPMENT NEEDED FOR GAS WELDING

2

Theory and Practical

TYPE OF FLAMES

I.          Neutral flame

II.        Oxidizing flame

III.      Carburizing flame

3

Theory and Practical

WELDING OPERATION

I.          Corner joint

II.        Edge or flange joint

III.      Butt joint

IV.      Lap joint

V.       Tee joint or Fillet joint

4

Theory and Practical

V groove joints

I.          Single-vee Butt joint

II.        Double-vee Butt joint

5

Theory and Practical

Welding techniques

I.          Forehand welding

Backhand welding

6

Theory and Practical

USE OF FILLER RODS AND FLUXES

OXYACETYLENE CUTTING Introduction

ARC WELDING Introduction

STRIKING AN ARC Introduction

HEAT AFFECTED ZONE

ARC BLOW

7

Theory and Practical

WELDING POSITIONS INTRODUCTION

I.          Down-hand welding position.

II.        Horizontal welding position (on a vertical surface).

III.      Vertical welding position (on a vertical surface).

Overhead welding position (say on the ceiling of a room

8

Theory

ARC WELDING DEFECTS

I.          Incomplete fusion and lack of penetration

II.        Porosity

III.      Slag inclusion

IV.      Undercut

V.       Cracking

9

Theory

ELECTRIC RESISTANCE WELDING

I.          Spot welding process,

II.        Seam welding process,

III.      Butt welding process, and Flash butt welding process

10

Theory and Practical

SOLDERING PROCESS

BRAZING PROCESS

INDUSTRIAL SAFETY

11

Theory and Practical

Gas Welding

1. Oxy-acetylene Gas welding Basic

2. Flat position gas welding

3. Vertical position gas welding

4. Horizontal position gas welding

5. Overhead position gas welding

6. Coper plate soldering and brazing

7. Manual straight, perpendicular gas cutting

12

Theory and Practical

Shield Metal Arc Welding

1. Shield metal arc welding basic

2. Flat position shield metal arc welding

3. Vertical position shield metal arc welding

4. Horizontal position shield metal arc welding

5. Overhead position V-shape butt welding

6. Pipe all position shield metal arc welding

13

Theory and Practical

Tungsten Inert Gas Arc welding

1. Installation & Operation of TIG welding machine

2. Stainless steel plate T-shape fillet TIG welding (F.V.H. and OH position)

3. Stainless steel plate butt TIG welding (F, V, H and OH position)

4. Aluminum plate T-shape fillet welding (F, V, H and OH position)

5. Aluminum plate I-shape butt TIG welding (F, V, H and OH position)

14

Theory and Practical

MAG (CO2)/MIG arc welding)

1. Installation and Control 

2. Mild steel plate F, V and H position bead (CO2 gas arc welding)

16

Theory and Practical

CLEANING METHODS

I.          Pre-Cleaning

II.        Final Cleaning

III.      In-process Cleaning

What Are Heat Tints and Corrosion

- Heat Tints

- Corrosion

Types of Weld Cleaning

I.          Mechanical Weld Cleaning

II.        Chemical Weld Cleaning

III.      Electrochemical Weld Cleaning

Benefits of Electrochemical Cleaning

-How do you remove discoloration from stainless steel?

- What is the best cleaner for stainless steel?

17

PROJECT

18

PROJECT

19

PROJECT

WEEK 20

FINAL