What is the difference between spot welding projection welding and T welding

17 Aug 2020

During spot welding, the welded parts are connected at individual points on the contact surface. When welding, lap the welded sheets and assemble them and press them between the two cylindrical copper electrodes. When a considerable current is passed, a large amount of heat is generated at the contact of the plates, which quickly reduces the metal in the hottest area in the center. Heat to a molten state, forming a lens-shaped liquid molten pool. After the current is disconnected and the metal cools, a welded joint is formed. According to the number of solder joints welded at the same time, it can be divided into single-point, double-point and multi-point spot welding. When the current is applied from both sides of the weldment, it is called double-side spot welding, and when the current is applied from one side of the weldment, it is called single-side spot welding. The diameter of the solder joint is generally close to the diameter of the electrode contact surface, which is approxima...

Read More

What are the types of spot welding electrodes

10 Aug 2020

Spot welding electrode determines welding quality The material used to make the electrode has sufficient electrical conductivity, thermal conductivity and high-temperature hardness, and the structure of the electrode must have sufficient strength and rigidity, as well as sufficient cooling conditions. In addition, the contact resistance between the electrode and the workpiece should be low enough to prevent the surface of the workpiece from melting or alloying between the electrode and the workpiece surface. Spot welding electrode is an important part to ensure the quality of spot welding. Its main functions: 1. Conduct current to the workpiece; 2. Transfer pressure to the workpiece; 3. Quickly dissipate the heat in the welding zone. Based on the above-mentioned functions of the electrode material used by the spot welder, it is required that the electrode material has sufficient electrical conductivity, thermal conductivity and high-temperature hardness, and the electrode structure mus...

Read More

What are the basic operating steps of the spot welding machine?

03 Aug 2020

Basic operation steps of spot welding machine The spot welding machine adopts the principle of double-sided double-point overcurrent welding. When working, the two electrodes press the workpiece to make the two layers of metal form a certain contact resistance under the pressure of the two electrodes, and the welding current flows from one electrode to the other electrode When the two contact resistance points form an instantaneous thermal fusion, and the welding current flows from the other electrode along the two workpieces to this electrode to form a loop without damaging the internal structure of the welded workpiece. [caption id="attachment_3259" align="alignnone" width="366"] hdpe welding machine[/caption] 1. Prepare the materials. 2. Open the gas valve and turn on the power of the precision spot welder (A opens the gas valve to confirm that the air pressure is between 0.2-0.3, and B turns on the power to check that the parameter settings are correct). 3. According to different w...

Read More

Electrode arc welding safety and maintenance technology

27 Jul 2020

1. Safety and protection technology We must pay attention to safety and protection during the operation of electrode arc welding. Safety and protection techniques mainly include avoiding electric shock, arc radiation, fire, explosion, and poisoning by toxic gases and smoke. 2. Avoid electric shock In the case of electrode arc welding, there is a risk of electric shock due to the grid voltage, the output voltage of the welding machine and the voltage of the portable lamp. Therefore, take measures to avoid electric shock. Or connect to zero. Welding cables and welding tongs must be well insulated, and if damaged, repair them in time. When welding with electrodes, wear insulated shoes and welding gloves. When welding in boilers, pressure vessels, pipes, and narrow and moist trenches, insulation pads must be provided and someone should be monitored outside. When using portable lighting, the voltage does not exceed the safe voltage of 36V, and does not exceed 12V when working at heights. Wh...

Read More

Principle of platform spot welder

20 Jul 2020

The articulated non-marking platform spot welding machine is a new concept spot welding machine, which has many advantages that the traditional spot welding machine can't match. The platform spot welding machine can make equipment management convenient, product quality improved, work efficiency improved, labor intensity reduced, and production environment improved. When welding parts such as iron cabinets and work tables, there are no welding pits on the outer surface of the parts, which improves the product quality. For spot welding of deep parts of the cabinet, it is difficult for traditional spot welders to reach the weld. Follow this site to understand the latest market situation of domestic Linyi spot welding machines. The platform spot welder is very easy. The use of pneumatic pressure can reduce the labor intensity of the laborer, obtain a constant spot welding pressure, and make the welding spot uniform. The flexibility and convenience of operation make the product design easie...

Read More

Basic requirements for flash butt welding of steel bars

14 Jul 2020

Continuous flash welding 1. It is closely related to the capacity of the welding machine, the steel grade and the size of the steel bar. The welding machine of a certain capacity can only weld the steel bars that meet the specifications. 2. According to the steel grade, diameter, welding machine capacity and different process methods, choose the appropriate transformer level. If the transformer level is too low, the secondary voltage is low, and the welding current is small, it will make flashing difficult, insufficient heating, and cannot use flash to protect the weld from oxidation; on the contrary, if the transformer level is too high, the flash is too strong, It will also cause a lot of heat to be taken away by the metal particles, and the temperature of the end of the steel bar will not rise. 3. The fluctuation of the power supply voltage has a great influence on the welding quality. During the construction on site, due to the large number of electrical equipment, the voltage drop...

Read More