Welding oscillator is primarily needed for welding in various areas of production. The oscillator is useful in that it can be used both in industrial production and in everyday life. The mechanism of action of the oscillator is to ignite the welding arc. Meanwhile, stable flame supply is maintained during operation. The most commonly used oscillator is the OP-240.
Since welding is indispensable in many areas of production and domestic work, the demand for oscillators is always high. But you don't have to buy it at all. Making an oscillator with your own hands is not so difficult. To do this, you only need the necessary materials and following the recommendations below.
Working principle
A do-it-yourself oscillator for an inverter or a purchased device is used to ensure stable operation of the welding arc. Frequency is 50Hz at a nominal operating voltage of 220 V. At the output, these parameters can increase to 150000-300000 Hz and 2500-3000 V, respectively. With this operation, the oscillator creates pulses with a duration of up to several tens of microseconds. Similar operating parameters, when high-frequency current passes into the welding circuit, are also due to the corresponding power - 250-350 W.
Composition
With such characteristics, a do-it-yourself aluminum oscillator has the capabilities that correspond to welding production or repair work in everyday life. It can be used to weld aluminum and other metals.
Consider the electrical components of the oscillator:
- discharger;
- two coil chokes;
- transformers: simple and high frequency;
- oscillating circuit.
A circuit consisting of a capacitor and a high-frequency transformer generates damped sparks.
What is a capacitor for?
The capacitor in this circuit performs an important function in protecting the device itself and the welding worker from various injuries caused by electricity. In the event of a breakdown, the electrical circuit is opened due to a special fuse. It serves as a protective element.
The device and the oscillator work together according to the following algorithm. Voltage is applied through a transformer to a capacitor. So it charges him. When fully charged, the capacitor transmits a dischargecurrent to the arrester, from which a breakdown is formed. Meanwhile, the oscillatory circuit is short-circuited. This whole process causes vibrations according to the resonant principle. But they immediately fade away. High-frequency current for resonant oscillations enters the welding arc, bypassing the capacitor and coil.
Do not forget that the design of the blocking capacitor causes the passage of high-frequency current through it, as a result of which there are high voltage values. The oscillator is protected against short circuits by the resistance, together with the current blocking by the capacitor.
How is the process?
To make your own oscillator, you will need a high voltage transformer. It is required to increase the voltage. Also, you can not do without a button on the heating pad. It serves both to supply gas to the plasma arc nozzle and to control the annealing. All this protects the metal from exposure to oxygen and makes it possible to form an argon environment, in which the process of metal welding takes place directly.
The work process is as follows. After pressing the control button, the arrester lights up, creating a pulse frequency. The existing high-voltage transformer is fully responsible for this. A highly magnetic field is created through the arc, after which it is converted thanks to the coil. The latter is made by winding with a conventional welding cable.
This design has two outputs - plus and minus. Both of them pass through a transformer. However, the first goes to the burner, but the second goes to the part. After pressing the control button, the gas enters the burner through the valve. This is the start of the welding process. Also, any oscillator, be it factory or homemade, must have a capacitor.
Before you undertake to design an oscillator for welding with your own hands, you should familiarize yourself with the drawings of its design in advance. If you have even basic knowledge in the field of electrical engineering, this will not be a particular problem. In addition, design experience is desirable. When making an oscillator yourself, you should remember that you need to follow safety precautions. Because there is a risk of electric shock.
Production order
In order to weld mainly aluminum parts, you can make a welding oscillator with your own hands. For installation, one of the most commonly used schemes is used:
- First of all, you need to choose a reliable transformer so that it can provide increased voltage supply from nominal 220 to 3000 V.
- After that, we install a spark gap gap.
- Next, we connect another important element - an oscillatory circuit with a blocking capacitor that generates high-frequency pulses.
That's all, the oscillator is ready. The main part of the circuit of this device is the oscillatory circuit. It must include a blocking capacitor. An oscillatory circuit, which also includes an inductor and a spark gap, is necessary to generate pulses. With their help, the welding arc is ignited much easier.
A do-it-yourself oscillator bought or made can be pulsed or continuous. But the latter option is less efficient. In addition, an additional device is required for high voltage protection.
Production rules
Thus, if the device is planned to be used exclusively in everyday life, then it is best to make an oscillator for welding with your own hands, since its purchase from the manufacturer and dealer will be very expensive. On top of this, you must have the skills to assemble such devices and knowledge of electrical engineering.
If you intend to make an oscillator with your own hands, you need to pay attention only to the correct assembly, but also to the competent operation of this device. After all, the device is powered by electricity. And if safety precautions are not followed, the risk of injury is high. You should carefully approach the assembly of electrical circuits and use only those parts that are fully suitable for their characteristics. If you follow all the recommendations, making an oscillator with your own hands will not be too difficult. All you need is all the necessary tools and materials.
