[News] Shot Peening - an Indispensable Process

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Shot peening is an important and, for safety reasons, an essential process in many industrial sectors, primarily in the aerospace and automotive industries. Peening dates back to Bronze Age armourers; although in more recent years, this technique has been used by engineers who worked the surface of a component with a "ball peen hammer" in order to induce internal compressive stress and thus increase service life. Drive components (i.e. gears) are often subjected to the shot peening process in order to induce compressive stress, which considerably reduces the risk of fatigue cracks during their operation. Technological requirements in all industrial sectors, especially the automotive and aircraft industries, are becoming more and more extensive, particularly with regard to shot peening. With precise adherence to all shot blasting parameters such as angle of impact, shot-blasting time and shot-blasting pressure (compressed air blasting), discharge rate of the shot-blasting media from the shot-blasting wheel, type of shot-blasting media and degree of surface coverage, the service life of many components such as gearbox components, drive and crank shafts, springs, turbine blades and turbine components in general and many others, increases. The flow of shot blasting media is monitored either magnetically or by weighing devices, depending on whether metal or non-metal shot blasting media is used. Shot blasting media classification, which classifies the media by shape and size, is an important point in shot peening or compression-shot-blasting. Thanks to our multiple research and development activities and our in-house worldwide test centres, Rösler is in a position to offer a wide spectrum of sophisticated shot peening systems. Shot peening requires absolute accuracy and repeatability. These are guaranteed by a special, fully-automatic process control with the universal robot shot peening system developed by Rösler for EADS, SNECMA and other aircraft manufacturers for the repair and maintenance of all types of engine components. A large range of engine components can be processed, and their life improved, using these systems. They operate fully automatically, PLC or computer-controlled (Supervisor) and fulfil all technical requirements and specifications.

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