Inverter Spot Welding Machine | Medium Frequency

Medium frequency inverter spot Welding Machine is suitable for welding of copper, aluminum, nickel, molybdenum, tungsten, manganese, gold, silver and other non-ferrous metals, widely used in low carbon steel plate, stainless steel plate, galvanized plate, aluminum plate, wire spot welding, multi-point projection welding, high strength steel, hot forming steel spot welding and nut projection welding, as well as high and low voltage electrical industry copper wire, silver spot and copper plate welding. It is widely used in automotive electronics, auto parts, inductors, resistors, relays, low-voltage appliances, capacitors, electric light sources, sensors, electroacoustic, temperature controllers, filters, micro motors, precision hardware, FPC welding, transformers, small household appliances, LED, batteries, wire harness forming pressure square, hearing AIDS and other products.

Medium frequency inverter Spot Welding Machine is converted from three-phase alternating current to DC after rectification, and then the inverter circuit composed of IGBT becomes the primary of medium frequency 1000Hz square wave access welding transformer, and the welding transformer step-down rectification becomes a small pulse of direct current supply electrode to weld the workpiece. The inverter adjusts the duty cycle of IGBT by feeding back the primary or secondary welding current, so as to achieve the effect of constant current in the welding process.

Spot Welding of Resistance Wire and Terminal Pin

Our company for the electric heater industry Resistance Wire and cold rod, cold needle welding, specially developed medium frequency inverter spot welding machine, has been highly recognized by customers.

1. The welding point of the heating wire and the lead rod is smooth, no welding slag, no deformation, and small expansion after welding;
2. The welding point at the peeling solder joint has a large melting magnetic flux, and the welding is firm and reliable;
3. Welding process without splash (spark), safely;
4. Withstand tension, can fully reach the highest standards.

Product Characteristics

1. The current flowing through the secondary welding circuit is DC, so the influence of the induced reactance in the secondary circuit due to the different secondary lengths in the deep welding workpiece on the welding current is greatly reduced.
2. Three-phase balance load, reduce the power requirements of the power supply system, power factor close to 1, no inductance component, no need to adjust the power factor.
3. Eliminate the pollution of the power supply, is a green welding, do not need to provide a separate power supply, it can be linked to the robot welding tool control system.
4. Reduce power consumption, energy saving, but also reduce the need and cost of cables and a lot of maintenance costs.
5. The quality of the welding transformer is greatly reduced, light and fast, only 1/3 of the quality and volume of the AC transformer, which is suitable for robot welding systems.
6. Improve the heat input efficiency, the output of the welding transformer is DC voltage, no inductance bother, pure direct current circuit has no shortcomings of zero crossing, and the heat efficiency is greatly improved.
7. Intelligent digital full closed loop control, welding control current more accurate, adjustment accuracy and monitoring accuracy than AC system 20 times higher. Inverters and transformers can be protected.
8. Increase the stability of the welding process, DC welding process is good, welding parameters can be adapted to a wide range, secondary current can really maintain constant current, than AC has a more widely used prospects.
9. The digital control improves the current control and measurement accuracy, and the welding time accuracy is millisecond, which can control the welding time arbitrarily.
10. It can weld aluminum and galvanized metal and other materials, welding results are good.
11. Especially suitable for three-layer plate welding, welding of very thin materials and precision welding requirements.
12. Precision inverter DC resistance welding, higher inverter frequency, more accurate current control.

Technical Parameter

Component

Medium frequency inverter spot welding machine is usually composed of rectifier transformer main circuit, control box, power transformer secondary circuit and welding transformer three parts. Among them, the main circuit of the rectifier transformer includes a leap-over transformer, a rectifier bridge pole and a direct current element, which converts alternating current into direct current. The secondary circuit of the power transformer includes the power transformer, the rear capacitor and the output plate, which plays the role of controlling the power output. Welding transformers convert high voltage to low voltage suitable for spot welding operations.

Spot Welding Process

By converting the low-frequency AC power supply to the high-frequency power supply, the medium frequency spot welding machine increases the electrical energy to a high pressure of hundreds of thousands of volts, and controls the pressure after partially heating the metal joint, so that the joint instantly melts and holds for a certain time. At the same time, while controlling the current size and heating time, the appropriate melting degree is ensured.

When using the medium frequency inverter spot welding machine for spot welding, it is necessary to set the appropriate welding parameters first, including the current size, heating time, welding pressure and other factors, and clamp the electrode in the metal part to be welded. After starting the main machine, the two poles contact to complete the spot-welding process.

Advantage

1. High energy saving: low welding current and electrode pressure;
2. High quality: Compared with the general traditional welding machine, the stability of its welding electricity is unmatched by other Machines;
3. Low cost: three-phase power supply balanced input, high power factor, electrode life more than 1 times more durable than traditional;
4. High efficiency: A solder joint can be completed in a shorter welding time than traditional machines, increasing production speed.