Specifications
The Autofrettage technique is used on thick walled metal tubes or components, to improve the durability of the part by creating a compressive residual stress at the bore. It dictates a pressure that is high enough to plastically deform the bore of the part, but not so high that it bursts the part. The pressure is applied to the inside of the tube. The result after the pressure is removed, is the elastic recovery of the outer wall puts the inner wall into compression, providing a residual compressive stress. The main reason to autofrettage a part is to increase its fatigue life. The applications are typically heavy walled tubes that experience cyclic loading and are thus prone to fatigue. Applications where this process is used include diesel engine components such as fuel rails and fuel lines, hydraulic cylinders, oil field components and waterjet components such as cylinders and check valves. The Interlaken system has a pressure intensifier rated for pressure up to 100,000 psi, a computerized control system with autofrettage software, custom designed tooling for your specific part, and a hydraulic power supply.