It is now widely used mechanized welding. This is due to high mobility semi-automatic, the ability to weld in confined areas. Mechanized welding is widely used in conveyor lines in machinery for welding housings of all types of vehicles and construction of structures in their pre-assembly and welding, etc. Semiautomatic devices for arc welding with consumable electrode classified according to several criteria, in accordance with the standard. By way of protecting the arc the following classification of semi-automatic: – active in gas-shielded (F) – in the rare gases (I) – Submerged (F) – open arc (G). By way of controlling the speed of wire feed are available with semi-smooth, stepped and combined management. Semiautomatic also distinguished by the method of feeding the electrode Wire: Pushed, drawing, universal. By way of cooling the burner producing semi-burner with natural cooling (up to 300 A) and with forced cooling (500 A).
The service life of semi-automatic welding adopted five years with the change of the welding torch through every six months. In poluavtomatax mechanized only feed the electrode wire, which is fed into the combustion zone of the arc through a flexible hose pustotelny, so these semi- called the hose. For welding of low carbon and low alloy steels consumable electrode in an environment of carbon dioxide in all positions except the ceiling, are widely used semi-Series PDG. Stabilization of output parameters of power supply in conjunction with the stabilization of the electrode wire feed speed allows you to receive high-quality welds. Semiautomatic this series consist of feeder, the DC power supply or a pulsed power source, welding torch, gas equipment and connecting hoses. The package includes semi-automatic welding torch type GDPG.
Management of semi-automatic descent control unit by a special unit-2 (control semi-automatic welders). In adjustment mode control unit performs the following operations: the inclusion of the gas supply to adjust its rate or dosage unit set wire feed speed, the choice of the operating cycle for welding long, short and spot welds. In the welding control unit ensures that teams start completion of welding. When you receive the command includes the start of welding gas supply, power supply and then by 0.5 turns of wire feed. If you receive a command to stop the weld off the motor feeder and it is braking off shielding gas supply and power supply, the control circuit returns to its original position. Semiautomatic welding-type PDI provides a pulsed mode. Semiautomatic CDP-516 (FS-13) can be welded solid steel as well as flux cored wire. For welding in different spatial positions, some types of semi-automatic series are equipped with knee-PDG turning device. These devices allow you to increase the productivity of welding operations as for fixed installations and mobile. In connection with the unification of the basic units semi Bole widespread are semi-universal (fast reconfigurable). One of these is the semi PN-112. Semi-automatic welding is used for self-shielding and flux-cored wire, but is easily and quickly reset to the welding carbon dioxide solid wire. In these semi-automatic with a special control unit is provided by a programmed welding current dependence on the type of electrode wire, its diameter, the welding conditions. This makes setting up semi-automatic. Welding conditions can be given a change of control knob voltage. Cassette unit and a control unit located on the chassis of lightweight construction. Semi-automatic comes chetyrehrolikovym feeders such as "IZAPLAN."