Ball screw is a commonly used transmission component in both Eastern and Western machinery. Its main function is to convert rotational motion into linear motion or torque into axial repetitive force, while also possessing high precision and reversibility. Due to its low frictional resistance, ball screws are widely used in various industrial equipment and instruments.

A ball screw consists of a screw, nut, steel ball, pre press plate, reverser, and dust collector. Its function is to convert rotational motion into linear motion, which is a further extension and development of the Ekm screw. The significance of this development is to transform bearings from sliding motion to rolling motion.

1) External circulation: External circulation refers to the process in which the ball passes through the spiral groove or insertion tube on the outer surface of the nut and enters the circulation from the beginning between the screw and nut. As shown in Figure 2-3, the return methods of the external circulation ball screw nut pair during ball circulation mainly include end cap type, insert tube type, and spiral groove type. Common external circulation method: end cap type; Intubation type; Spiral groove type. End cap type, a longitudinal hole is machined on the nut as a return channel for the ball. The cover plates at both ends of the nut have return ports for the ball, which allows the ball to enter the return pipe and form a loop. Intubation type, which uses a bent pipe as the return pipe, has good processability, but due to the large radial standard of the pipe nut outside the body. Spiral groove type, which is milled out on the outer circle of the nut, with through holes drilled at both ends of the groove and tangent to the threaded raceway to form a return channel. This structure is smaller than the radial standard of the insert tube type structure, but the production is more chaotic. The external circulation ball screw has a simple structure and manufacturing process, and is widely used. Its drawback is that it is difficult to make the seam of the rolling track smooth, which affects the smoothness of the ball rolling track.

2) Internal circulation: Both internal circulation systems use reverberators to complete ball circulation, and there are two types of reverberators. Cylindrical convex key reverser, with its cylindrical part embedded in the nut and a reverse groove 2 at the end. The reverse groove is positioned by the outer circular surface of the cylinder and the circular key 1 at its upper end to ensure alignment with the direction of the threaded raceway. Flat round block reverser, which is a general round head flat key block. The block is embedded in the groove of the nut, and its end has a reverse groove 3, which is located by the outer induction of the block. Comparing two types of inverters, the latter has a smaller standard, and then reduces the radial standard of the nut and shortens the axial standard. However, the precision requirements for the external induction of this type of inverter and the cutting groove standard on the nut are relatively high.

Drawing in the building materials market is a process of repeatedly using sandpaper to scrape aluminum plates and metal strips into lines. The main process includes three parts: de esterification, sand grinding, and water washing. In the wire drawing process, the special coating technique after processing can generate a coating layer containing the metal component on the metal surface, clearly showing each fiber trace, and then making the metal matte with a fine hair like luster.

The article originates from; Jiangmen Wire Drawing Factory http://www.bzcpm.com/