Processing principle of rolling cutter for hydraulic cylinder

Rolling knife processing is a commonly used method of surface strengthening of metal materials, which applies a certain pressure to the surface of the workpiece through a rolling head. The rolling head rolls the inner hole wall of the hydraulic cylinder in the radial direction of the roller, the workpiece rotates, and the rolling head feeds along the axial direction of the workpiece. When the compressive stress on the surface of the inner hole exceeds the elastic limit, dislocation slipping and fragmentation occur between the metal crystal grains, and the specific volume of the metal increases, and plastic deformation will occur. Not only the microscopic unevenness of the inner hole surface is smoothed, and the surface layer after rolling produces cold work hardening, which increases the surface hardness and improves the surface quality. The rolling head is installed on the boring bar, and the boring bar is installed on the tool carriage. By moving the tool carriage along the axis, the rolling processing of the inner hole of the hydraulic cylinder is realized.