DCI Aerotech is Nadcap AMS2432 Accredited for shot peening with a state-of-the-art seven-axis Fanuc Robotic Multi Media Shot Peen system.
Our FAA and NADCAP certified Shot Peening Department specializes in aerospace components and the comprehensive overhaul of aircraft landing gears. With unlimited programming capability, our facility excels in managing intricate geometries, catering to the needs of components ranging from small to large. Utilizing our advanced Lance system, we can perform shot peening with precision, reaching depths of up to 48 inches in the inner diameter. Notably, our system’s versatility enables quick transitions between different peening media, facilitating a broad spectrum of applications.
Our services extend to the flexibility of utilizing carbon steel shot and glass bead peening specifically designed for aluminum components, offering a versatile solution to meet specific material requirements. This comprehensive approach positions us as a reliable partner, equipped to address the diverse shot peening needs of across many industries, delivering top-notch quality and performance for a wide array of components.
Shot Peening Defined
Shot peening is very commonly used in aerospace manufacturing prior to the application of heavy deposit chrome and nickel plating, as well as on gears, and for parts rated for unlimited life under dynamic loads.
Shot peening is used to induce a uniform layer of compressive stress on the surface of the part. This helps prevent crack propagation because cracks form under tensile stresses. Peening leaves a dimpled surface similar to using a ball peen hammer on metal (but with very small dimples). These peen marks cover the material creating a highly stressed compressive layer.
The Benefits of Shot Peening
The primary advantage of shot peening lies in its ability to enhance fatigue resistance by inducing stress-induced strengthening, effectively mitigating the proliferation of cracks and extending the fatigue life of components. This attribute is particularly invaluable in aerospace and automotive applications, where maintaining structural integrity is paramount. In addition to fatigue resistance, shot peening contributes to improved resistance against corrosion and wear, thereby ensuring a longer operational lifespan for treated components. The process also plays a pivotal role in creating a uniform and controlled surface finish, promoting optimal material performance. Its versatility, accommodating a wide range of materials and geometries, positions shot peening as an indispensable tool for enhancing the durability, reliability, and overall performance of critical components across diverse industries.
Establishing Intensity
Establishing optimal shot peening intensities is a crucial aspect of harnessing the maximum benefit for treated parts. The intensity of shot peening, determined by factors such as shot size, velocity, coverage, and dwell time, plays a pivotal role in shaping the residual stress profile on the material surface. Striking the right balance is essential to induce beneficial compressive stresses without causing surface damage. Through meticulous testing and analysis, we tailor the peening parameters to the specific material properties and geometry of each part ensures a balanced blend of strength and durability.
Maintaining Shot Peening Integrity
The cleaning and maintenance of shot peen media are paramount to sustaining the effectiveness and consistency of our processing. Over time, media can accumulate contaminants, debris, or worn particles, diminishing their abrasive properties and compromising the quality of surface treatment. Regular inspection and cleaning protocols are implemented to ensure the integrity of the media. This involves employing advanced separation systems to isolate and remove impurities from the media stream, preventing unwanted elements from impacting the precision of the peening process. Additionally, we utilize advanced media recycling systems to separate reusable shot from spent particles, minimizing waste, optimizing cost-effectiveness, and maintaining quality results.
Preparing the Part
Proper masking ensures that only designated areas of a component are exposed to the shot stream, allowing for targeted treatment and preventing unintended impacts on critical surfaces. DCI Aerotech employs a variety of techniques, such as precision masking tapes, coatings, or physical barriers, to shield specific regions from the shot stream. Careful consideration is given to the complexity of component geometries, material composition, and the desired outcome of the peening process.