Autofrettage

Overview

• This method shall be conducted at the final process of the product in order to improve the durability by reducing the stress which is estimated to occur on the wall due to the high voltage variation and high voltage used on the place where a high pressure is applied in a moment but intermittently for the purpose of the product's function and secure the durability by generating the plastic deformation maintaining the pressure of 5,000 bar and is applied to production of Fuel Injection High Pressure Pipe of Kukdong Industrial Engineering.