Talking About The Manufacturing Method Of Ball Screw
Hello everyone, I am Xiaorun, the editor of Yongrun Precision. Today I will continue to share with you the explanation of the manufacturing method of ball screws.
Ball screws can be roughly divided into two categories: "ground ball screws" and "rolled ball screws". There is not much difference between "ground ball screw" and "rolled ball screw" as the components that make up the ball screw.
Therefore, the differences in the manufacturing method of the ball screw mainly include (1) the manufacturing method of the threaded shaft (2) the performance manufacturing and inspection corresponding to the performance of the ball screw, a total of 2 aspects.
The following is a brief explanation.
(1) Threaded shaft
The manufacturing process of the threaded shaft is simplified as shown below.
?In the manufacturing process of improving the quality of the ground ball screw, the forming of the thread groove is performed by cutting, the high-precision cutting of other shapes (outer diameter, shaft end) and the polishing of the thread groove in the final process, and rolling balls Screws are manufactured in different ways.
?In addition, the ground threaded shaft suppresses the aging deformation of the shaft (long-term deformation) by heat treatment, and performs cryogenic treatment to improve wear resistance.
In the thread grinding process, in order to improve the machining accuracy of the long thread shaft, the temperature control of the cutting fluid should be controlled in the same way as the room temperature.
(2) Silk mother
The manufacturing process of silk mother is simplified as follows.
?The difference between the nut for rolling ball screw and the nut for grinding ball screw is that in order to make the shape of the nut as the assembly reference plane, the shape cutting and thread groove polishing are carried out. The manufacturing process of the mother is additional processing.
(3) Assembly of the ball screw
The difference between the two types of ball screws in the assembly process is that the nut for the ground ball screw pursues the built-in "preload" performance, and the rolled ball screw is very simple because it is not required.
?The ground ball screw is used for loading steel balls for preloading inspection. If the preloading performance cannot be produced, replace the balls with different diameters for self-certification and check again.
?After completing the product inspection, grease, pack and ship.
?Check items??? Ball screw lead, effective diameter, thread groove shape, full runout, external dimensions of threaded shaft/nut, (pre-tightening torque)
If there are any inadequacies, please feel free to make corrections.
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