Connector Type 1

The basic arc welding joints commonly used form of butt, lap, fillet and T-shaped connection. Select the connection form, mainly based on the product structure, and considering the stress conditions, processing costs and other factors. Butt and overlap, compared with a simple uniform force, to save metal, etc., it is the most widely used. However, under the expected size of the butt joint and assembly requirements more
Strict.

Groove in the form 2

According to the design or process needs to be welded at weldments processed into certain parts of the geometry, the composition of the trench after the assembly is called groove. Mechanical (shearing, planing or turning), flame or arc (carbon arc gouging) and other processing is called groove groove. Groove depth to groove to the bottom of the arc, to ensure that the bottom penetration, easy slag, get a better weld, but also adjust the base metal and weld metal in the proportion of filler metal.
Arc welding groove forms should be based on weldment structure, thickness and selection of technical requirements, commonly used form of the groove: I-shaped, V-shaped, X-shaped, Y-shaped, double Y-shaped, U-shaped groove with a blunt edge, etc. . General butt joint thickness 1-6mm, the use of I-shaped groove Welding Electrode Supplier using single-sided or double-sided welding to ensure penetration; Thickness ≥ 3mm, in order to ensure the effective thickness of the weld or weld penetration, improved weld, can be processed into a Y-shaped, X-shaped, U-shaped and other shapes of the groove.
In the same thickness, compared with single-sided double-sided bevel groove, U-shaped than V-shaped groove welding groove consume less, welding deformation is small, as the thickness increases, these advantages become more prominent. However, U-shaped groove processing more difficult, beveling the high cost, generally used for more important structures.
When the different thickness of steel docking, according to relevant standards and technical documentation requirements for thick steel plate groove side of the thinning process.
Groove with the thickness of the general form and size change, Shihai and welding methods, welding position, the amount of heat input. Groove processing methods and the workpiece material and so on. Groove form and size see national standards GB/T985-1988 "gas welding, arc welding and gas welding weld the basic form and size."

3 weld pad

When asked to weld full penetration, and only from one side of welding joints, in addition to forming side welding welding technology, but also can increase weld seam on the back pad method. Use soldering pads are designed to provide conditions in which the first metal layer deposited on top of the liner, thus avoiding the layer of molten metal from leaking through the bottom connector.
There are four forms of padding used: lining bar, weld backing, copper pad, and non-metallic liner.
1) lining of the lining of the joints on the back of the metal strips. The first bead on both sides of the connector with the - starting with the lining of the phase. If the lining of the joints do not prevent the use of features, you can remain in the original position; otherwise, shall be removed out of the lining. Lining shall be adopted and used in the metallurgical base metal and electrode material on the match.
2) copper pad and sometimes the underlying copper pad support in the joint weld pool, it applies to straight butt welds. Higher thermal conductivity of copper, with the liner to help prevent weld metal fusion.
3) non-metallic liner of refractory lining is a scalable formed parts, closely aligns with the fixture or in connection with the back pressure-sensitive, it applies to space surface butt weld. Electrode arc welding method, sometimes also use this pad. Should follow the liner manufacturer using the recommended specification.
4) backing backing weld groove welds in the welded joints in the side of a road or the back of the weld. This weld is deposited in the front groove weld before the first deposition in the joints of the back, after completion of weld backing, weld all the rest are in the groove from the front to complete.

4 welding position

Welding, the welded joints in which the spatial location of pieces called the welding position, according to the spatial location of the weld can be divided into: flat welding, vertical welding, horizontal welding and overhead position welding positions, such as shown in Figure 3-10 .
Level of fixed tube butt weld, including the flat welding, vertical and overhead position welding and other welding welding position. Like this when welding position welding, known as the all-position welding.
Care about the welding position welding, the droplet can fall into the pool with the help of gravity. Pool in the gas, slag easily floating surface. Therefore, the flat welding welding current can be larger, high productivity, good weld, the welding quality is easy to guarantee good working conditions. Thus, the general should care about the Cast Iron Welding Electrodes position welding. Of course, in the other position welding, the welding quality can be guaranteed, but the technique requires a high welder, working conditions poor.

5 electrode consumed

When carrying out welding work, the need to correctly estimate the amount of electrode is very important to estimate the excess, the backlog will result in the warehouse: estimate is too small, will result in the lack of project budget, and sometimes even affect the normal conduct of the project. Electrode consumption mainly by the form of welded joints, form and weld groove length and other factors, can be found in the fixed amount of manual welding, also according to the following formula:
1) The electrode consumption is usually determined by the formula:
m = alp / 1 - K S
Where m - electrode consumption (g);
A - Weld cross-sectional area (cm2);
J - weld length (cm);
p - the density of deposited metal (g/cm3);
Ks - electrode loss coefficient, see Table 3 - 17.
On the type of weld cross-sectional area A according to Table 3 - 16 in the formula.
2) non-consumption of iron powder type electrode can be calculated as follows: s
m = alp / Kn * (1 + Kb)
Where m - electrode consumption (g);
A - Weld cross-sectional area (cm2), Table 3-16:
l - the weld length (cm);
p - the density of deposited metal (g/cm3): 
Kb - the quality of drug skin factor, Table 3 - 18:
Kn - weld metal from the electrode to melt the transfer coefficient (including burning, welding spatter and loss, including the first),