Posted in Manufacturing Process

Safety Precautions while Working in Welding shop

Gas welding 1. One should not use a leaking gas cylinder. 2. One should not handle oxygen cylinders, valves, regulators, hoses or fittings with oily hands. 3. Welder should not mix the gases in one cylinder. 4. No one should transfer the gas from one cylinder to another. 5. One should clearly mention on the cylinders the type of gas in it (i.e. oxygen, acetylene, etc.). 6. One should use nose masks where the local exhaust ventilation is not practicable. Insist the safety officer to provide proper ventilation system. 7. Always avoid skin contact with fluxes, which contain fluorides. If…

Posted in Welding Engineering

Classification of Welding Processes #SecondPart

Continued From … Welding is a process of joining similar metals by application of heat with or without application of pressure and addition of filler material. The term “weldability” has been defined as the capacity of being welded into inseparable joints having specified properties such as definite weld strength, proper structure, etc. There are several factors that affect the weldability i.e. Melting Point, Thermal conductivity, Thermal Expansion, Surface condition, and Change in Microstructure. There are basically two types of welding, Plastic Welding and Fusion Welding. Plastic Welding: In Plastic welding or pressure welding, the pieces of metal to be joined are…

Posted in Welding Engineering

Classification of Welding Processes #FirstPart

Welding is a process of joining similar metals by application of heat with or without application of pressure and addition of filler material. The term “weldability” has been defined as the capacity of being welded into inseparable joints having specified properties such as definite weld strength, proper structure, etc. There are several factors that affect the weldability i.e. Melting Point, Thermal conductivity, Thermal Expansion, Surface condition, and Change in Microstructure. There are basically two types of welding, Plastic Welding and Fusion Welding. Plastic Welding: In Plastic welding or pressure welding, the pieces of metal to be joined are heated to plastic…

Posted in Welding Engineering

Basic Welding Operations Introduction

Welding is widely used by metal workers in the fabrication, maintenance, and repair of parts and structures. While there are many methods for joining metals, welding is one of the most convenient and rapid methods available. In order to join two or more pieces of metal together by one of the welding process, the most essential requirement is heat. Pressure may also be employed, but this is not essential in many processes. Welding is the process of joining metals by heating them to their melting temperature and causing the molten metal to flow together. These range from simple steel brackets…