Thank you for visiting Dengensha’s video site for Capacitor Discharge Welder patented flexible waveform technology or Flexwave. This video includes a demonstration at the 2015 FABTECH show in Chicago. Flexwave is our new breakthrough Flexwave technology.
It combines the capabilities and benefits of advanced capacitor discharge welder (CDW), and medium frequency converter (MFC). CDW’s feature, which generates less thermal distortion based on its large current in a shorter weld time, is combined with MFC’s feature, which provides stable current feedback. Next we’d like to show how weld nugget quality is optimized. You can see 3 different types of waveforms on this chart. As you can see on the Flexwave waveform, a large current is applied in a much shorter weld time and in a more stable form, compared to MFDC or CDW waveforms. This is achieved because the capacitor is always fully charged, providing the fastest current start up every time. This technology is beneficial to aluminum and high tensile materials. This shows how we can maximize the flexibility of the waveform. Waveform of current can be freely programmed in polarity at every 1 millisecond, allowing necessary welding parameter setting, such as tempering, demagnetization, and upslope. Flexwave provides energy savings. It is highly efficient by recharging only the energy required, while the conventional welder would have to completely recharge the capacitor. Because of this efficiency, Flexwave can achieve a shorter cycle time. Now, we’d like to show you a video of demonstration at the 2015 FABTECH show in Chicago. On this regular MFDC welding sample, you can see the ring surface appears burnt as it was welded at a high current for a fairly long time. After a clamp test, however, you can see a gap in the welded section. If you look at this Flexwave welding sample, the surface is really clean. You may think it is not welded correctly. This clamped sample, however, clearly shows proper bonding, which is proven by a strength test. It shows a good welded condition without burnt marks. Here is the Flexwave demonstration with two pieces of aluminum. Each piece is 2.5 mm, total of 5 mm thickness. Welding is done in a very short time at a weld current of 50,000 amps. You can immediately touch the surface because it is not hot. Additionally, the surface is really clean. It does not show any temper color like you saw earlier with MFDC. If you have any questions, please contact Bob Donovan at Dengensha. Thank you for watching!