It is a kind of resistance spot welding.

The Suspended welder is composed of welding tongs, transformer, controller, water cooling system, pneumatic pressure system, suspension device and other parts.

According to the action of the welding arm, it is divided into two types: X type and C type.

The welding arm of the X-type suspension welder opens and closes like scissors. This type of welding machine is suitable for welding workpieces with large dimensions and large welding positions. The commonly applied arm lengths are 330mm, 420mm, 500mm, and 600mm. The length can be up to 1200mm, and special ones can be customized.

The static welding arm of the C-type suspension welder is L-shaped, and the other welding arm is perpendicular to the short side of the L-shaped welding arm. The encircling circle formed by the two welding arms is like the letter “C” when it is not closed. This type of welding machine is suitable for industries where the workpiece is large but the throat depth of the welding position is not large, and the welding speed requirements are high, such as the welding of the pipe in the duct mouth and the flange angle iron.

Welding Principle

When welding, firstly place the workpiece between the electrodes of the welding tongs, and then press the welding switch, the “pressurization” program segment starts, the solenoid valve acts, and compressed air enters the cylinder of the welding machine to actuate the electrodes of the welding tongs, compress the workpiece, and pass With a proper delay, the “welding” program segment starts. At this time, the primary coil of the welding transformer is connected to the power supply through the control of the thyristor, and the secondary generates welding current to weld the workpiece. After the “welding” program segment ends, the transformer primary When the coil is powered off, the welding machine enters the “maintenance” program. After the pressure is maintained for a period of time, the solenoid valve is disconnected, the welding gun releases the workpiece, and the welding machine enters the “rest” program. At this point, a welding cycle has been completed.

The time control of each program segment such as “pressurization”, “welding”, “maintenance” and “stop” during the operation of the hanging spot welding machine is completed by the time regulator in the spot welding machine controller. The length of time required for each procedure and the size of the welding current (ie “welding specification”) should be set in advance according to the welding process.

Features

1. Compact structure, convenient maintenance and small size, which greatly reduces the labor intensity of workers and saves energy consumption to a large extent.

2. The electrode arm of the suspension spot welder is made of high-quality chromium-zirconium copper (CuCrZr-1), which ensures the stability of the welding performance, the service life of the welder and the strength of the electrode arm.

3. The air path system of the hanging spot welding machine has a large diameter, and is equipped with imported pneumatic components to make the welding gun move fast and improve the production efficiency.

4. When welding, the heating time is short, the heat is concentrated, there is no arc, no spark splash, no welding slag, no fusion welding accumulation, and no thermal deformation of the weldment. Coupled with the innovation of the welding machine, the diameter of the gas path system has increased, so not only the welding productivity is high, but also the energy consumption is low (72.3% electricity saving), and the weldments are beautiful in appearance and good quality.

5. Welding is done by the proper cooperation of resistance heat and mechanical force, so high-strength and high-quality solder joints with weld nuggets can be obtained.

6. Because the welding process is simple, no filling materials, solvents, and shielding gas are needed, the cost is low.

7. Due to the high current density and high temperature of the welding point of the weldment, after the welding machine controller accurately controls the energization time, the welding point can get a reproducible nugget size, so it can adapt to multiple types of the same or dissimilar metals and coatings Welding of steel plates.

8. The suspension type spot welding machine adjusts the heat by changing the conduction angle of the thyristor through the welding machine controller, so it is easy to realize mechanization and automation, so it can be matched with a robot for fully automatic welding operation.

 Application Range

Suspension welding is a processing method in which the workpiece does not move and the welding tongs move.

  It is mainly applied for welding low-carbon steel, low-alloy steel, stainless steel, plated steel, plate and round steel that cannot or are inconvenient to be welded by general fixed welders. Widely used in industries such as automobiles, rolling stock, anti-theft doors, cabinets, household appliances and construction, wire mesh spot welding, etc.