Classification of the Thermal Cutting Processes

Classification of the Thermal Cutting Processes

Thermal cutting processes can be classified according to different aspects. According to the common physical processes, a distinction can be drawn between flame cutting, fusion cutting and sublimation cutting. The material is treated as follows: When flame cutting, it is mainly burned, and the combustion products are expelled by an oxygen jet of high kinetic [...]

Basic of weld design - Stresses in Welded Joints

Basic of weld design – Stresses in Welded Joints

Upon explaining the material stresses resulting from the action effects axial force N, shear force V and bending moment M. The peculiarities of stresses in welds and welded joints are considered. The stresses in welds can be categorised as to the kind and direction of the actions and the type of weld. Axial stresses parallel [...]

Ignition of the arc

Ignition of the arc

The welding arc is ignited by direct contact of the electrode with the workpiece. Due to a short circuit a high current density is created in the contact area. By this means, the melting phase and the metal vapour is formed, by which the ionisation can start quickly. The arc increases as soon as a [...]

Welding arc - properties, forming

Welding arc – properties, forming

Many important joining processes make use of the arc as a tool and energy source. The arc performs the penetrations and deposits the filler. Furthermore it supplies energy for physical and metallurgical processes which are important for welding. As glow discharge or real or artificial flash also the arc is a special kind of gas [...]

Overview of the Metal Welding Processes

Overview of the Metal Welding Processes

At first you see an overview of the different fusion welding processes. The list of pressure welding processes according to classification of the energy transfer medium which is used for welding is as follows: Schematic presentation of some pressure welding processes

Symbols, Numbers, Indexes of Welding Process

Symbols, Numbers, Indexes of Welding Process

ISO 857-1 was widely, up to and including chapter 3, replaced by EN 14610 in view of the harmonisation of the European internal market and in the course of globalisation. Due to the relevance of the contents from ISO 857-1 that had not been included in EN 14610, these are to taken from DIN 1910-100.The [...]

General introduction of welding technology.Definition of Terms

General introduction of welding technology.Definition of Terms

Terms and designations in connection with metal welding processes Back-step welding - Type of welding in which short pieces of the seam are welded against the main direction of welding in such a manner that the end of a piece of seam overlaps the beginning of the preceding one. Basic material - Material which the work piece [...]

Welding Processes According to DIN 1910-100

Welding Processes According to DIN 1910-100

Classification According to Purpose of Welding A distinction is made between joint and build-up welding. Joint Welding Joint welding is the creation of a permanent joint between two or more work pieces by means of welding There are only the following types of joint in welding technology: Butt welds, Fillet welds, Other joints The type [...]

Soldering and brazing. Definitions for Soldering According to ISO 857-2

Soldering and brazing. Definitions for Soldering According to ISO 857-2

ISO 857-2 defines processes of soldering and brazing as well as related terms. Soldering and brazing Joining process in which molten solder is used with a liquidus temperature lower than the solidus temperature of the basic material(s). The molten solder moistens the surfaces of the basic material(s) and is drawn into a narrow gap between [...]

General Introduction into Welding Technology

General Introduction into Welding Technology

From the Sumerians to the Lasers In the beginning, there was fire! This primary source of energy was the only usable source for this purpose as well. The connection of two metallic work pieces was accomplished by means of forge welding. The two parts were heated in fire and then forged together. The beginning of [...]