SKIVING AND ROLLER BURNISHING FOR CYLINDER BORES

 Hydraulic cylinder want to operate effectively, the cylinder’s ID must be precisely round and have a mirror-like surface finish to ensure a tight seal between it and the mating internal piston. This is commonly achieved through skiving and subsequent roller burnishing inside a tubular workpiece. Skiving uses a set of carbide blades positioned around the diameter of a tool to slice away chips and create a geometrically round bore. Roller burnishing, a cold-working process, uses multiple rollers to compress the peaks of material left behind after skiving to generate an extremely smooth surface finish. Burnishing also introduces a residual stress layer into the cylinder wall, which improves cylinder fatigue life.

The skiving roller burnishing tool is a multifunctional tool used widely in the manufacturing of hydraulic cylinders and compared to honing the advantages are:
• 80-90% saving of machine time which reduces tool costs per meter of tube length.
• Produces super finish surface, with a bore tolerance of H8, thereby reduces the sealing wear making it ideal for pistons.
• The tool can be optimized for both skiving and roller burnishing operations.