There are many processing methods for spline shafts. It mainly adopts cutting processing methods such as hobbing, milling and grinding, as well as plastic deformation processing methods such as cold hammering and cold rolling.

  1. Hobbing method: Use the spline hob to process the spline shaft milling machine or gear hobbing machine according to the generative method. This method has high productivity and precision and is suitable for mass production.
  2. Milling method: On the universal milling machine, use a special forming milling cutter to directly mill the contour between teeth, and use an indexing head to separate teeth by tooth-by-tooth milling; if the forming milling cutter is not used, two-disc milling cutters can also be used to mill one tooth at the same time On both sides, after milling tooth by tooth, use a disc milling cutter to slightly trim the bottom diameter. The productivity and accuracy of the milling method are low, and it is mainly used for processing spline shafts centered on the outer diameter in single-piece small batch production and roughing before hardening.
  3. Grinding method: Grind the spline tooth side and bottom diameter on the spline shaft grinder with a formed grinding wheel, which is suitable for processing hardened spline shafts or spline shafts with higher precision requirements, especially splines centered on the inner diameter. axis.
  4. Cold play: It is carried out on a special machine tool. The two heads arranged symmetrically on the outer side of the circumference of the workpiece rotate at a constant speed ratio with the indexing and rotary motion of the workpiece and the axial feed. Each time the workpiece rotates by 1 tooth, the forming wheel on the head matches the cogging part of the workpiece Hammering once, under the continuous hammering of the high-speed and high-energy movement of the wheel, the surface of the workpiece is plastically deformed to form a spline.

The accuracy of cold hammering is between milling and grinding, and the efficiency is about 5 times higher than that of milling. Cold hammering can also improve material utilization.

Ningbo Shitai Precision Machinery Co., Ltd. is a spline shaft manufacturer, as well as auto parts shaft and other products. Our customers provide quality services and products.