Processing method of ball spline

Processing method of roller spline
There are many methods for processing ball splines. Mainly using cutting methods such as rolling, milling, and grinding, as well as plastic deformation processing methods such as cold rolling and cold rolling.
Rolling cutting method of ball spline: using ball spline to machine on spline shaft milling machine or hobbing machine according to the unfolding method, this method has high productivity and accuracy, and is suitable for mass production.
Milling method of ball spline: Use a specialized forming milling cutter to directly mill the tooth profile on a universal milling machine, and use a dividing head to divide the teeth and mill them tooth by tooth; If a form milling cutter is not used, two disc milling cutters can be used to mill both sides of one tooth at the same time. After milling each tooth, a disc milling cutter can be used to slightly adjust the bottom diameter. The productivity and accuracy of milling method are relatively low, mainly used in single piece and small batch production to process ball spline shafts with outer diameter centering and rough machining before quenching.
Grinding method of ball spline: Use a formed grinding wheel to grind the tooth side and bottom diameter of the spline on the grinding machine of the roller spline, suitable for processing hardened spline shafts or ball splines with higher precision requirements, especially those centered on the inner diameter.
Cold play of ball spline: carried out on specialized machine tools. The two punch heads symmetrically arranged on the outer circumference of the workpiece rotate at a constant speed ratio with the indexing and axial feed of the workpiece. Every time the workpiece rotates one tooth, the forming punch wheel on the punch head strikes the tooth groove of the workpiece once. Under the continuous hammering of the high-speed and high-energy motion of the punch wheel, the surface of the workpiece undergoes plastic deformation and forms a spline. The precision of cold drawing is between milling and grinding, with an efficiency about 5 times higher than milling. Cold drawing can also improve material utilization.