First page of the electric welding engineering archive

Fundamental Principles

Posted by Juan on December 9, 2019 with Comments Closedas

1) Solder: Union of two or more metals ensuring continuity gives the subject. 2) Welding: welding processes, thermal cycle localized melting and heat treatment. 3) Welding: Result of the welding process. There are two types of welding: Welding homogeneous: The filler metal is equal to the base metal. Heterogeneous Welding: Filler is different from the base metal. Slag: Removes internal tensions. Ensures that no quenching (slow cooling). Protect gases (oxygen, hydrogen and nitrogen).

Create atmosphere in vacuum. You may find technology investor to be a useful source of information. Characteristics of the process In this process the necessary heat is produced by passing an electric current generates an arc between the electrode and workpiece, reaching a temperature ranging between 4000 a "5000 AD. The arc produces the filler metal melting instantly and progressive, and metal base. In this process the heat source and the contribution of metal are dependent on each other, ie, that if you want more heat will provide more heating metal and do not open without any input. The fusion of base metal under the arch is located in an area much smaller than in the case of oxy-acetylene welding. The deformations are smaller but very fast cooling does not allow correct, the cooling rate also leads to tension and the possibility of nerve. Beginning of the process.

A simple circuit is formed by welding a welding machine with two terminals, one that corresponds to the electrode holder and the other to ground. In this circuit the current flows through the wire electrode holder, the electrode, forming the bow and returned on the ground wire closing the circuit. The first step after switching on establishing a contact between the electrode and the workpiece. At that time there is a short circuit and to generate the arc is necessary to move the electrode until the distance between this and the piece maintains a stable arc. The arc progressively melt the electrode and the workpiece to reach complete melting thereof. Welding current intensity and speed. Electric current can be considered as the flow of electricity second post goes through a conductor, and this is measured in amperes. It is called the intensity of current passing through the electrode and the workpiece when it is on the bow. For a given diameter electrode, the melting rate and the volume of metal produced, depends on the intensity of welding current. For a given feed rate, by increasing the current, more metal is deposited per unit length, and the section of string will be boosted. In this case the greater the amount of heat absorbed by the piece and this is heated much more, so that: the metal is more fluid and the cord is wider and flatter and more penetrating. Starting voltage and arc voltage in all welding equipment there are two different voltages, one that corresponds to when the computer is turned on without soldering, ranging from 45 to 100V. The second for the maintenance of the arch (or is working notebooks) that goes from 15 to 45V. All welding system installations must comply with five points: 1) Reduce stress network 250V power supply 50. 2) Permit to regulate the intensity of welding current. 3) In certain cases, allow the starting voltage (dynamos and rectifiers). 4) Ensure automatically regulate the voltage at the time of the arc lights. 5) Ensure a stable arc. Michel Yndart: Uruguay Web:.