From Shot and Flapper Peening to Pneumatic-Controlled Needle Peening,
here are the differences

The technologies in regard to peening have evolved at lot during the last years. If you are interested in learning more about new techniques and standards, the following article provides some background information.
Alternative Peening Methods – from Shot and Flapper Peening to Pneumatic-Controlled Needle Peening

The peening industry widely relies on the shot peening method, but this method does not address different challenges such as energy consumption, machine footprint or accessibility.

In the article published by Metal Finishing News, MFN International, Charlie Clouet, Sales Director at Shockform, weighs the standard shot peening method with the flapper peening technique that solves some of the issues mentioned above.

The flapper peening technique uses Kevlar flaps on which some tungsten carbide bearing balls are glued. The speed at which the flap is rotating provides the momentum to the balls that transfer their kinetic energy onto the surface of the part.

The needle peening is another technique. It is sometimes confused with the needle hammering, but the applications of these techniques are very different. In fact,
–          The needle hammering aims to “peen” (or “hammer” the welds toe area to modify its profile), while
–          The needle peening uses tungsten carbide needles that are much smaller and are particularly used with repairing aero engines, power generation turbines, airframes or other critical components where other peening technologies show shortcomings.

All described peening techniques are framed by SAE AMS specification, such as AMS2430 for shot peening, AMS2590 for flapper peening and AMS2545 for pneumatic needle peening.

It is understood that Shockform’s products are certified for these standards: the FlapSpeed©PRO meets AMS2430 and AMS2590 specifications (shot peening and flapper peening) while the Spiker©-ES is certified for AMS2545.

In fact, Shockform’s Spiker©-ES is the only needle peening equipment known on the market using in-house developed tungsten carbide needles for optimal performance. Have a look at the short Spiker©-ES video to see how it works.

Want to know more about the different peening technologies? Read on at MFN International or contact Charlie Clouet for your specific questions.