About High frequency energy storage pulse welding
The modification of welding current waveform according to practical conditions and requirements, is an important way to improve the welding quality of various metals, especially the application of high-frequency pul.
With the development of social production, higher requirements are put forward for welding.
2.1. High-frequency pulsed current waveformIn the fusion welding process, the introduction of ultrasound can improve the crystallization co.
3.1. Arc characteristics and metal droplet transferAs a source of heat and force in the welding process, welding arc is critical to metal droplet transfer.
It has already been known that the traditional pulsed GTAW welding has the disadvantages of higher heat input and distributed arc energy, while increasing the pulse frequency.
It is still at an early stage in the study of high-frequency pulsed arc welding, which needs to be improved. On the one hand, the effect of high-frequency pulsed arc on the formation an.In pulsed GTAW, the high-frequency pulse current causes arc constriction during the peak current phase. This constriction concentrates the arc energy, leading to a more stable and controlled welding process.The use of monitoring systems has become increasingly popular to enhance the control and consistency of pulsed GTAW.
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6 FAQs about [High frequency energy storage pulse welding]
What is high-frequency pulsed welding?
Nowadays, some new welding processes, applying high-frequency (usually more than 5 kHz) pulsed current, have been proposed and have become a development trend, such as high-frequency pulsed welding, high-frequency pulsed variable polarity welding, double-pulsed welding and inter-pulse welding adopting SiC-based power devices.
What is fast-frequency pulse TIG welding technology?
With the development of pulse TIG welding technology, the fast-frequency pulse TIG (FFP-TIG) welding technology using 20 kHz ultra-high frequency (UHF) pulse modulation current with obvious high-frequency shrinkage effect and electromagnetic stirring effect has been gradually improved.
What are the benefits of high-frequency pulsed current in fusion welding?
In conclusion, in the fusion welding process, the introduction of high-frequency pulsed current is beneficial to the constriction of welding arc, the increase of weld penetration depth, the reduction of weld porosity, the refinement of the microstructure in weld zone and the enhancement of weld mechanical properties.
Does high-frequency current pulsation affect tungsten arc welding?
Regarding the weld bead dimensional aspects, greater values of width and penetration were obtained when the high-frequency current pulsation was applied. Several studies in which a pulsed current was applied in the gas tungsten arc welding (GTAW) process, particularly at frequencies below 10 Hz, have been reported in the literature.
What is the arc pressure of HF pulse modulated AC TIG welding?
Qiu et al. [ 6] measured the arc pressure of HF pulse modulated AC TIG welding at an arc length of 3 mm, an average welding current of 125 A, a cathode cleaning rate of 20%, and a HF peak current of 50 A.
Does pulsation frequency affect weld penetration?
The observed changes in the arc characteristics, due to the pulsation frequency of the welding current, will be reflected in the geometry of the weld bead. In this regard, the experimental results of Saedi et al. [ 8] indicate that the weld penetration increases with the pulsation frequency of the current.
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