Main technical parameters of precision electronic spot welding machine

＊Power input: 220V, 50HZ or 115V, 60HZ

＊Welding efficiency: 2000 points-7200 points/hour

＊Welding voltage: 0-2.5V

＊Welding current: 0-300A

＊Welding time: 2-20MS

＊Welding pressure: 0.2-2.0KG

＊Welding wire diameter: Ф0.005 mm—Ф0.380 mm

＊The metal wire that can be welded: width 2mil-20mil, thickness 0.005mil-21mil (1mil=0.0254mm)

* Large output power: 750VA

Principle of Welding

1. Output principle

The mainframe of the automatic nickel sheet wire bonding machine is composed of an intermediate frequency inverter DC resistance welding control power supply. It has the characteristics of fast charging and discharging, no pollution to the environment, and long cycle life. This energy storage power supply is known as the environmental protection of the century. A new type of green energy. With the intelligent phase control integrated module as the core, the intermediate frequency inverter DC resistance welding control power source is a single-phase or three-phase AC power that is converted into a pulsating DC power through a rectifier circuit, and it is converted into an intermediate frequency square wave through an inverter circuit composed of power switching devices. The transformer is rectified into a direct current with less pulsation after the voltage is reduced and supplied to the electrode to weld the workpiece. The inverter usually uses current feedback pulse width modulation to obtain a stable constant current output. The intermediate frequency inverter spot welder has excellent performance and is suitable for welding thin metal parts with high thermal conductivity and fine workpieces.

2. Welding principle

The major feature of the electronic spot welding machine is that it can directly weld enameled wires. This function is mainly completed by a special structure welding head. The welding head is composed of two pieces of metal with good conductivity. Insulated, there is only one contact at the top, this contact forms a small resistance, and the bottom of the welding head is flat and smooth. When the pressure device presses the welding head on the enameled wire, the pressure will continue to increase. When the reaction force of the enameled wire to the welding head reaches the set welding pressure, a pulse current will be triggered. Between milliseconds and ten milliseconds, the size is about tens to more than 100 amperes. The current flows from the bottom of the welding head, and the contact resistance at the top of the welding head will heat up and generate electric sparks. This heat can turn the paint of the enameled wire Remove and a large amount of heat will be transferred to the copper wire inside the enameled wire. At the same time, another part of the current will flow from the bottom of the welding head through the burnt-out copper wire. The copper wire itself is also heating up. The temperature of the copper wire will reach the molten state before the melting point in a short time. Under the action of pressure and under the pressure The metal forms a new nugget, and the enameled wire is connected to the metal substrate through this process. Because it is a direct connection between metals, the welding can be completed