Stainless steel laser welding machine welding matters

1.Welding surrounding conditions, including: the type of base metal, thickness, groove shape, form fitting, bound state, ambient temperature and humidity, cleanliness and based on the various factors to determine the wire (or rod) and a diameter welding current, voltage, welding speed, welding sequence, welding method, transport gun (or shipped reviews) methods.
2.Connect the connector by welding. Welded joints including weld fusion zone and the heat affected zone of three parts. The basic form of joint: butt, fillet, lap and T-connection and the like. In the cross-section of welded joints, base metal melting depth. When welding, weldment joint space position is located. There are flat welding, vertical welding, horizontal welding and overhead welding and other forms.
3.Connected by welding steel is called welding structure. Groove - according to the design or process requirements, the parts to be welded weldments processed into a certain geometry, the trench after the formation of the assembly. To weldment penetration and reduced fusion cross section ratio; commonly used form of slope mouth there: I, V, Y, X, U, K, J type.
4.In order to slow down the cooling rate of the weldment after welding, to prevent cold cracking. In order to eliminate welding residual stress and improve the microstructure and properties of welded joints. Ensure the welding quality control rely on five major areas: human, machine, material, method, ring. Man - welder's skills and experience of machine - high performance and stability of the material welding equipment - welding materials, high-quality method - correct welding procedures and standard operating ring - well before the welding operation environment based welding test welding and welding technology assessment to develop welding procedures are "regulations" to ensure the quality of welding is an important factor.
5.Weldment groove surface and if there is oil (paint), water, rust and other impurities, will melt into the weld porosity, inclusions, slag, cracks and other defects, to welded joints harm and risks. Wire melting coefficient refers to the amount of melt per unit time through the wire unit current. (G / Ah) wire finer, melting coefficient, the higher the efficiency of both.
6.Welding, welding in order to ensure quality and selected such physical (such as: welding current, arc voltage, welding speed, heat input, etc.) in general. When the welding current flowing through the welding circuit, generally expressed in amperes (A). Arc voltage drop at both ends (two electrode), generally expressed in volts (V).
7.The weld is completed within a unit length of time, generally expressed in cm / minute (cm / min). When welding, the wire ends from the distance of the contact tip end portion. When welding, the welding heat input to the energy per unit length on the weld, also known as "heat input." Usually expressed in Joules / cm (J / cm).
8. When welding, base metal is melted in the weld metal portion of proportion. When welding in single pass weld bead width and cross section of the weld thickness ratio. When welding, welding torch by a member of the right end of the seam welding method to move to the left. Gas effect, weld appearance.
9.CO2, TIG welding are left with the welding method; MIG welding aluminum must be left to the bonding method. When welding, welding torch by a member of the left end to the right end of the movable joints of welding method. Because there are welded joint microstructure and properties of unevenness, but also there are often a number of welding defects, there is a high tensile residual stresses; so welded joint is welded structure weaknesses.
10.Improve the quality of welded joints, can proceed in the following ways: correct matching welding materials, welding process using reasonable methods to control fusion ratio, adjust the welding heat cycle characteristics, the use of reasonable methods of operation and groove design with a pre hot, interlayer insulation and slow cooling, hot and other measures, or weld heat treatment methods, get high-quality welded joints.