A more suitable procedure is shot peening with compressed air and a controlled flow of medium through the nozzle. Here, all key processing parameters (air pressure, size, shape, and quantity of abrasive, distance, angle,…) are fully adjustable and controlled. The process is 100% repeatable and documented for each piece separately. As a result, the equipment for shot peening with compressed air is highly demanding and the process itself is slower, as nozzle shot peening is performed individually – piece by piece with a precisely directed and controlled moving nozzle on a specific surface.
Another dilemma we need to resolve with the client is the question of their gear and shaft improvement process, i.e. the “heat treatment process”. At this stage, we can already advise the optimal methods and also the right shot peening equipment; so, the client can do his own economic study and make his decision independently.
Shot peening is the common technology of surface treatment of gears after heat treatment. It’s a very old process, about as old as I am, but it is a big challenge for new companies and new generations of engineers who want to improve mechanical properties and produce first-class, lightweight gears that run as quietly as possible and have maximum elongation lifespan. The eternal question that follows in the first contacts with potential customers is, in addition to the choice of appropriate shot peening equipment, to advise them about the appropriate technology and materials and prescribe the right procedures for which we stand behind and guarantee.
Well, this is usually where it gets complicated: there are as many, often specific, manufacturing processes and heat treatments of gears as there are manufacturers. Shot peening usually benefits gears a lot, but it can also deteriorate them, depending on the previously applied improvement technology. So, who can – regardless of the vast available literature, studies, and professional articles – correctly identify each specific case and give sovereign advice? Here, first and foremost, we clearly see the advantage of our accumulated knowledge and decades of experience, and above all our own research and tests.