Spot welding machine inverter type and energy storage type

Which power supply is best for spot welding?

DC power supplies offer the best electrical efficiency and the most precise control of the spot welding process. In particular, as mentioned, the MFDC machines have become the power supplies of choice in automotive production plants.

What is resistance spot welding with inverter technology?

The specific advantages of resistance spot welding with inverter technology vary from customer to customer, but one interesting use is for cascade welding. This is when a control (using just one weld schedule), initiates a single air valve to close multiple electrodes, and sequentially fires two or more silicon controlled rectifiers (SCRs).

What are the different types of spot welding electrodes?

The most used spot welding electrodes are the Class 1 and 2 Group A electrodes. The first three classes of Group A electrodes are shown on Table 3.1, which reveals the rela-tionship between increasing strength and decreasing electrical/thermal conductivity with increasing class numbers.

Why is spot welding important?

This is extremely important when spot welding in a high production environ-ment since it means the transformer can be mounted at the end of the robot arm, greatly increasing electrical efficiency. The gun that holds the electrodes generates clamping force either pneumatically, or using electric servo motors.

How to choose electrode material for a spot welding application?

The choice of electrode material for a given spot welding application is an important consideration. Electrodes must be able to conduct current to the part, mechanically con-strain the part, conduct heat from the part, and provide for long life.

Why should you use an inverter for power distribution cascading?

Inverters are great for power distribution cascading, which allows for even power distribution such that each phase of the line can be fired in a sequence that minimizes power requirements of the welding equipment. This is particularly important in systems that are already at their available power limits.