Skip to main content

Gas Welding Technique & Oxygen Cutting

What is gas welding technique and oxygen cutting of metals and how is it performed in workshop? The usual gas welding techniques in oxy-acetylene welding are as follows:

1. Leftward or fore-hand welding:

In this method, the welding torch is held in the operator's right hand, the tip pointing towards the left and the weld is made from right to left. The torch makes an angle of 60° - 70° with the plate and the welding rod makes an angle of 30° - 40°. The plates above 6mm thickness are not economical to weld with this method.

2. Right-ward or back-hand welding:

In this method, the welding torch is held in the right hand and the filler rod in the left-hand. The welding begins at the left-hand end of the joint and proceeds towards the right. The torch makes an angle of 40° - 50° with the plate and the welding rod makes an angle of 30° - 40°. This method is better and economical for plates over 6 mm thickness.

3. Vertical welding:

The vertical welding may be carried out either by the left-ward technique or by the right-ward technique. The great advantage of vertical welding is that the plate edge preparation is not required up to 16 mm thickness.

4. Linde welding:

It is a special welding technique in which the use of oxy-acetylene flame with excess acetylene is made and the right-ward technique is used.

Gas or Oxygen Cutting of Metals

The cutting of iron and steel by using oxygen is extensively used now-a-days in industry. It is performed by an ordinary gas welding equipment, except that the welding torch is replaced by a cutting torch which consists of four openings.

Comments

Popular posts from this blog

Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find mo

Best CV Format for Mechanical Engineers

Fifty percent engineers fail to grab a dream job because of basic faults in their CVs/ Resume. This article tells you about best CV format for mechanical engineers and how you are supposed to design your CV when applying for jobs. You CV is your first impression on future employer. He/ she does not know you. Your CV is the only representation of your personality. He/ she may select or reject you after first glance on your resume.  I have experienced shortlisting and interviewing candidates for different jobs. I was astonished to learn that most of the candidates simply copy paste each others CVs without any changes at all. These types of CVs are rejected immediately. I am not trying to tell you that you should avoid copying, rather i ma telling you to refrain from giving your CV to your friends. An ideal CV consists of following portions: Name/ Address of the applicant Objective Education Record Employment History Professional Skills Awards & Achievements Co

Engineering Mechanics - Introduction

The Engineering Mechanics is that branch of Engineering-science which deals with the principles of mechanics along with their applications to engineering problems. It is sub-divided into the following two main groups: (a) Statics, and (b) Dynamics The Statics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies at rest. The Dynamics is that branch of Engineering Mechanics which deals with the forces and their effects, while acting upon the bodies in motion. It is further sub-divided into the following two branches: (i) Kinetics, and (ii) Kinematics The Kinetics is that branch of Dynamics, which deals with the bodies in motion due to the application of forces. The Kinematics is that branch of Dynamics which deals with the bodies in motion without taking into account the forces which are responsible for the motion.