Using welding tractor maintenance castings, except choose suitable welding method according to actual condition, also should pay attention to the following items: a welding, welding preparation before welding welding area and its surroundings should be harmful impurities such as rust, oil, paint and other thoroughly remove clean;
If the weld crack weldment thickness is less than 25 mm, should drill out about 4 mm in diameter check in;
Some of the weldment and according to the requirement of the wall thickness and process selection groove type, etc.
Second, the diameter of the electrode and the choice of different types of cast iron parts should choose the corresponding electrode;
Its diameter is mainly according to the welding place to determine the thickness of the weld repairs;
In order to prevent the formation of white and single fire organization, reducing heat affected zone, with small diameter electrode at present.
Three, the choice of power supply polarity in dc arc welding, to avoid excessive penetration, overheating and burning through the weldment, use reverse polarity connection, namely the weldment -
To answer the cathode, anode electrode.
Selection current is too large, the strength of the current increases, the depth of molten metal weldments component diffusion of impurities to the molten pool and changed the weld performance;
Starts to affect the stability of the arc current, easy generation, slag inclusion, porosity defects such as;
The current strength should be selected according to the cracks or defects in the space of weldment conduction, electrode number and diameter of should also be considered at the same time.
Five, the welding operation point in order to reduce cracks should try to avoid weld area local overheating, skip welding crack should be continuous, long section;
To reduce the penetration, should choose small current, electrode, and as far as possible with short solitary welds;
Good electrode for the plastic such as nickel base welding rod, copper iron welding rod, welding use round head immediately after small hammer lightly percussion welding, welding stress to relax, removal of cracks and pores;
Every little welding wave don't across the slope, both sides at the same time, this is advantageous to the incomplete part free shrinkage, and avoid arc in on both sides of the groove for too long;
Welding layer to the bottom cover to the underlying annealing, change to the processing performance.
Metal laser welding equipment recommendation: preferential deals offer 4007001618 【
Metal laser welding equipment 】
Suitable for all kinds of complex welding, the welding of different equipment and 1 mm thick seam welding;
Multi-channel fiber optic mode, welding transfer at the same time;
Mould laser welding equipment 】
Applicable mould industrialized, used for precision mold repair, such as digital products, mobile phones, toys, automobile, motorcycle, mold and other mold manufacturing and molding industry.
Gold and silver jewelry laser welding 】
Mainly used in jewelry, such as electronics, communications, handicrafts and other industries;
Large laser welding 】
Application in automobile body covering parts of compound, such as car door, side wai, window, floor, warehouse, the warehouse before, trunk lid.
Laser welding more metal welding equipment