Types of Welding Flames

Types of Welding Flames In oxy-acetylene welding, flame is the most important means to control the welding joint and the welding process. The correct type of flame is essential for the production of satisfactory welds. The flame must be of the proper size, shape and condition in order to operate with maximum efficiency. There are three basic types of oxy-acetylene flames. 1.Neutral welding flame (Acetylene and oxygen in equal proportions). 2. Carburizing welding flame or reducing (excess of acetylene). 3. Oxidizing welding flame (excess of oxygen).  The gas welding flames are shown in Fig Gas  welding flames Neutral Welding Flame A neutral flame results when approximately equal volumes of oxygen and acetylene are mixed in the welding torch and … Read more

Gas Welding Equipments: Gas pressure regulators, Welding torch, Torch Tips, Hose pipes, Goggles, Gloves, Spark-lighter, Filler rods, Fluxes

 Gas Welding Equipments An arrangement of oxy acetylene welding set up is shown in Fig. The basic tools and equipments used for oxy-acetylene welding are following  Oxy acetylene welding set up Acetylene and oxygen gas is stored in compressed gas cylinders. These gas cylinders differ widely in capacity, design and colour code. However, in most of the countries, the standard … Read more

GAS WELDING PROCESSES: Oxy-Acetylent Welding, Types of Welding Flames, Neutral Welding Flame, Carburising or Reducing Welding Flame, Oxidising Welding flame, Gas Welding Equipments, Gas pressure regulators,

GAS WELDING PROCESSES A fusion welding process which joins metals, using the heat of combustion of an oxygen /air and fuel gas (i.e. acetylene, hydrogen propane or butane) mixture is usually referred as ‘gas welding’. The intense heat (flame) thus produced melts and fuses together the edges of the parts to be welded, generally with … Read more

Safety Recommendations for Gas Welding

  Safety Recommendations for Gas Welding Welding and cutting of metals involve the application of intense heat to the objects being welded or cut. This intense heat in welding is obtained from the use of inflammable gases, (e.g. acetylene, hydrogen, etc.) or electricity. The intense welding heat and the sources employed to produce it can be potentially hazardous. Therefore, to protect … Read more

Functions or Uses of Collents or Cutting Fluids

 Functions or Uses of Collents or Cutting Fluids Water  base mainly grinding The important functions of cutting fluids are given as under. (i) Cutting fluid washes away the chips and hence keeps the cutting region free. (ii) It helps in keeping freshly machined surface bright by giving a protective coating against atmospheric, oxygen and thus … Read more

NON TRADITIONAL OR UNCONVENTIONAL MACHINING PROCESSES

 NON TRADITIONAL OR UNCONVENTIONAL MACHINING PROCESSES  Non traditional machining processes are also known as un-conventional metal machining or advance machining processes. The recent increase in the use of hard, high strength and temperature resistant materials in engineering has necessitated the development of newer machining techniques. With the exception of grinding, conventional methods of removing material … Read more

Electron Beam Weldinig (EBW)

 Electron Beam Weldinig (EBW) In EBW process, the heat is generated when the electron beam impinges on work piece. As the high velocity electron beam strikes the surfaces to be welded, their kinetic energy changes to thermal energy and hence causes the workpiece metal to melt and fuse.A schematic setup of the electron beam welding … Read more

INSPECTION AND QUALITY CONTROL

INSPECTION AND QUALITY CONTROL Inspection or checking of components or products with required specifications is very minutely related with quality control. It is generally an accepted fact that no two things can ever be exactly same. It also holds true with manufactured parts. Therefore certain variations or deviations in dimensions and other product specifications are accepted. However, only few produced articles or parts may be rejected if the deviations go beyond the specified quality … Read more

Characteristic of Metal Powders: Powder particle size and size distribution, Particle shape, Chemical composition, Particle microstructure, Apparent density, Flow characteristics

Characteristic of Metal Powders The performance of powder metallurgical parts is totally dependent upon the characteristics of metal powders. Most important characteristics of metal powders are powder particle size, size distribution, particle shape, purity, chemical composition, flow characteristics and particle microstructure. Some of the important properties are discussed as under. Powder particle size and size distribution Particle size of metal powder is expressed by the diameter for spherical shaped particles and by … Read more