Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or convert torque into axial repetitive force, and it has both high precision, reversibility and high Features of efficiency. Due to its low frictional resistance, ball screws are widely used in various industrial equipment and precision instruments.
In trapezoidal screw processing, the thread and knurling are completed at one time. The product has high efficiency, low cost, and low processing accuracy requirements. Its structural design ideas and schemes have good promotion and application value.
The difference between ball screw and trapezoidal screw:
1. Different transmission efficiency
The transmission efficiency of the ball screw is about 90~96%, and the transmission efficiency of the trapezoidal screw is about 26~46%. If it is to drive the same large load, the ball screw can use a smaller drive power.
2. Different transmission speeds
The ball screw is rolling friction, and the trapezoidal screw is sliding friction. The temperature rise of the former is much lower than that of the latter when working, so under normal circumstances, it can undertake the task of high-speed transmission.
3. Different service life
The surface damage of rolling friction is much smaller than that of sliding friction. Therefore, when the conditions of cleaning and lubrication are met, the maintenance life of the ball screw is much higher than that of the trapezoidal screw.
4. Different self-locking
The self-locking of the screw is generally inversely proportional to the transmission efficiency. Therefore, the ball screw is almost non-self-locking, while the trapezoidal screw has a certain degree of self-locking.
5. Different economics
From the previous and current situation, the ball screw is still more expensive than the trapezoidal screw because its structure is more complicated than that of the trapezoidal screw. However, with the increase in automation equipment and the increase in output, the price difference is getting smaller and smaller.
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