Which is more suitable for enameled wire welding: spot welding machine or pulse hot pressing welding machine?

The spot welding machine is equipped with a medium frequency inverter DC welding power supply, a precision pressure head and a special welding head (high temperature resistant, high resistance material). The positive and negative electrodes of the welding head are connected on the left and right sides. When the welding head presses down the enameled wire, a large current flows through the welding head in a short time, the welding head instantly generates heat energy, the tin instantly melts and solidifies, and the tin is coated on the welding wire.

Release time:

2024-08-21 16:42

Enameled wire welding machine principle comparison:

Principle of enameled wire spot welding machine:

Principle of pulse hot pressing (pulse current heating) of enameled wire:

1. The heating method of the pulse power supply for enameled wire welding is to use the Joule heat generated when the pulse current flows through high-resistance materials such as molybdenum and titanium to heat the welding. Generally, a thermal couple is connected to the front end of the heating nozzle, and the generated starting power is fed back to the control power supply in real time to ensure the correctness of the set temperature.

2. The pulse current heating device is an instantaneous heating mode and is powered only when the solder needs to be melted.

3. When current passes through the metal welding nozzle, heat is generated to melt the solder. After the solder melts, stop the power supply and cool it down. By applying pressure until the solder solidifies, high-reliability welding without false welding and floating welding can be achieved.

Comparison of the advantages of enameled wire welding machines:

Advantages of enameled wire spot welding machine

1. Faster efficiency. The discharge time is usually a few milliseconds to tens of milliseconds. It meets the requirements of high production efficiency.

2. Applicable to various solder joints (pads). Solder joints (pads) do not need to be tinned.

3. It can accurately control the electrode current or voltage, but cannot control the electrode temperature.

Advantages of enameled wire pulse heat press (pulse current heating):

1. The welding rod (welding head) temperature can be accurately controlled within ±2 degrees to avoid burns on welding products;

2. The pad (solder point) needs to be tinned (or printed). The enameled wire can be better covered with tin, achieving a greater pull-out force and less deformation of the enameled wire.

3. Compared with the enameled wire spot welding machine, the efficiency is slow, the heating time is 0.3 seconds, and the heating and cooling time is more than 2 seconds