The Role Of Ball Screw Bearings
With the development of science and technology, ball screw bearings have been rapidly popularized and applied. In recent years, the technology has continued to improve, with a wide variety of types, which are widely used in many fields. Please follow the editor to learn more about ball screw bearings. working principle.
Ball screw bearing principle.
Ball screw bearing is a kind of ball screw bearing. It installs spherical alloy steel balls in the middle of steel ring and outer steel ring to reduce friction during power transmission through rolling and improve the transmission efficiency of mechanical power. Can not bear large loads, ball screw bearings are more common in light industrial machinery. Ball screw bearings are also called ball screw bearings.
Explain how ball screw bearings work.
Ball screw bearings are mainly composed of four basic components: ball (ball). Inner ring (innerring). Outer ring (outerring) and cageorretainer.
And the hardness of the retainer is smaller than that of spherical and annular, and the material of the retainer is metal (eg: medium carbon steel. Aluminum alloy) or non-metal (eg: Teflon. PTEF. Polymer). Rolling bearings have smaller rotational frictional resistance than journal bearings, so at the same speed, the temperature due to friction is lower.
Ball screw bearings are usually used in mechanical transmission equipment with small loads. Due to the small bearing area of the ball screw bearing, it is very easy to cause serious mechanical damage during high-speed operation. Therefore, needle roller bearings are often used in heavy-duty mechanical transmission to increase the bearing surface, improve the mechanical transmission efficiency, and reduce mechanical damage at the same time.
By changing the friction mode of the ball screw bearing and adopting rolling friction, the friction phenomenon between the bearing surfaces can be more effectively reduced, the service life of the fan bearing can be improved, and the service life of the radiator can be prolonged. The disadvantage is that the process is more complicated, the cost increases, and it also brings about a large working noise.
What is the function of a ball screw bearing?
1. According to GB/T17587.3-1998 and application examples, the ball screw bearing (which has basically replaced the trapezoidal screw, which is commonly known as the screw) is used to convert rotary motion into linear motion. Component, or an executive component that converts linear motion into rotational motion, and has high transmission efficiency and accurate positioning.
2. When the ball screw bearing is used as the active body, the nut will convert the rotation angle of the screw into linear motion according to the lead of the corresponding specification, and the passive part can be connected with the nut through the nut seat to realize the corresponding linear motion.
Ball screw bearing features:
1. The driving torque is 1/3 of the sliding screw pair.
There are a large number of balls rolling between the screw shaft and the nut of the ball screw, which can achieve high movement efficiency. The driving torque is lower than 1/3 of the previous sliding screw pair, that is to say, the required power is only 1/3 of the rolling screw pair. This is great for saving electricity.
2. High precision guarantee.
Ball screw is the world's most advanced mechanical equipment made in Japan, especially grinding and assembly. Check the factory environment of each process, the temperature and humidity are strictly controlled, because there is a perfect quality management system to ensure the accuracy.
3. Possible microfeeds.
Since the ball screw uses ball motion, the starting torque is extremely small, and there will be no creeping phenomenon such as slippage, which ensures the realization of precise micro-feeding.
4. No gap, high rigidity.
The ball screw can be pressurized, and the axial clearance can reach a negative value due to the application of pressure, so as to obtain higher rigidity (by pressurizing the ball inside the ball, in actual use in mechanical devices, etc., due to the repulsive force of the ball can be used. The rigidity of the silk mother part is enhanced).
5. High-speed transportation is possible.
The ball screw can achieve high-speed feeding due to its high motion efficiency and low heat generation.
Accurate tolerances: C10, C7, C5, C3, C2, C1 - the smaller the value, the higher the accuracy.
●The world's major ball screw manufacturers:
Taiwan ZTPM is climbing ball screw, Taiwan Shangyin ball screw, Taiwan ABBA ball screw, Taiwan PMI ball screw, China Nanjing craft ball screw, Korea SBC ball screw. Japan THK ball screw. Japan NSK ball Screw, German STAR ball screw, etc.
Ball screw bearing with high DN value: high-speed machine tool, high-speed comprehensive machining center machine;
Head ball screw bearing: rapid processing system, general industrial machinery, automated machinery;
High-speed ball screw bearings: CNC machinery. Precision tools. Industrial machinery. Electronic machinery. High-speed machinery;
High-precision grinding-grade ball screw bearings: drives for CNC machinery, precision machine tools, industrial machinery, electronic machinery, conveying machinery, aerospace industry and other antennas. Valve switching devices;
Rotary (R1) series ball screw bearings: semiconductor machinery, industrial robots, woodworking machinery, lightning strike processing machines, mobile devices, etc.;
Ball screw: low friction, stable operation, fast supply and low price;
Heavy-duty ball screw bearings: all-electric injection molding machines. Stamping machines. Semiconductor manufacturing equipment. Heavy-duty braking. Industrial machinery. Forging machinery.