The ball screw module is one of the linear modules, which can become one of the most widely used automation products in the industrial equipment industry, largely because of the coordination and interaction between ball screw and other accessories, and the ball screw plays an important role in it. There are many kinds of screw rods in the market, so why choose ball screw instead of ordinary screw rod? What are the differences between the two?
1. Differences in transmission efficiency. The transmission efficiency of the ball screw can be as high as 90~96%, which is largely due to the fact that there are many balls rolling between the screw shaft and the screw nut of the ball screw, so a higher movement efficiency can be obtained. The transmission efficiency of trapezoidal screw is about 26~46%. That is to say, under the complexity of the same size, the ball screw can use less driving power, which can effectively reduce production costs, reduce losses and increase more benefits for enterprises.
2. Differences in transmission speed. Ball screw is rolling friction and trapezoidal screw is sliding friction, which shows that the temperature rise of the former is much lower than that of the latter during transmission operation, and the ball screw can undertake the task of high-speed transmission.
3. Differences in accuracy. The working principle of the ball screw is different from that of the common screw. When the ball screw is used as the main body, the nut will be converted into linear motion with the rotation angle of the screw according to the lead of the corresponding specification, and the passive workpiece can be connected with the nut through the nut seat, thus realizing the corresponding linear motion. The sliding screw directly increases the acting force at both ends of the sample through linear motion, so the sliding screw has a certain sliding friction coefficient, which is lower in accuracy and efficiency than the ball screw.
4. Differences in service life. The surface friction of ball rolling friction is small, and the service life of ball screw is longer than that of ordinary screw under the premise of reasonable operation of various cleaning and maintenance.
5. Differences in self-locking. Self-locking is generally inversely proportional to transmission efficiency, so the ball screw has almost no self-locking and has the reversibility of transmission; The trapezoidal lead screw has a certain self-locking property.
6. Differences in economy. Ball screw is more complicated than ordinary screw, but it is also better and has more outstanding advantages, so the price of ball screw is higher than ordinary screw.
Generally speaking, the ball screw has many advantages, such as transmission efficiency, transmission speed, accuracy, load and life span, etc. So it is more suitable for linear modules, but its cost is higher than that of ordinaryscrews, and its design is more complicated, which requires hardened precision bearing surface and a ball circulation device. The trapezoidal lead screw is small in size, flexible in design, low in noise and good in corrosion resistance under normal use, and can be equipped with self-locking function to meet the requirements of vertical application.
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