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Dalian THK manufacturer Maoming Jingji's analysis of the characteristics of THK ball screws

Publish Time：

2022-08-25

Ball screw drives achieve transmission through the rolling motion of balls between the screw and the nut, with transmission efficiency as high as 85%~98% ，which is that of ordinary sliding screw transmission efficiency of 2~4 times. Using THK ball screws is currently an effective measure to improve the sensitivity and positioning accuracy of the feed system and prevent creeping.

 

THK Screw principle

 

The transmission principle of the ball screw is that the screw moves at high speed driven by the servo motor, and drives the mechanism fixed on the nut through the nut. Advantages and disadvantages of screw

 

THK Screw transmission achieves high transmission efficiency, which is unattainable by ordinary sliding screw transmission.

 

1、 、screw and

 

2 nut After pre-tightening, the axial clearance can be eliminated, which helps to improve the axial transmission accuracy and axial rigidity 、Because the screw friction loss is small, its service life is longer than that of ordinary sliding screws. 。3 、Screw transmission is basically

 

4 rolling friction, and the frictional force is so small that it almost has no effect on the speed of motion. 、The ball screw can realize the transformation from rotary motion to linear motion,

 

5 Ball screw THK Authorized distributor Maoming Precision Machinery believes that it can realize the conversion from linear motion to rotary motion, and the screw and nut are both active parts and driven parts. Because of the above-mentioned advantages of ball screws, as a kind of precise and labor-saving transmission mechanism, it is widely used in the precision machine tool industry. However, it seems that everything in the world should be viewed from a dialectical point of view, and ball screw transmission also has some shortcomings: Due to the weight of the screw itself, the moving parts cannot self-lock after the transmission stops, so a braking device needs to be equipped separately.

 

1. The processing accuracy of screw and nut components is relatively high, so the process is complex, the manufacturing is difficult, and the cost is increased to some extent.

 

2. Screw characteristics

 

THK Many balls are installed in the raceway of the screw, and the balls are the rolling intermediate components between the screw and the nut, so that the sliding friction transmission between the screw and the nut becomes rolling friction transmission

 

。Ball retainers are installed at both ends of the spiral groove of the nut, and the return pipe allows the balls to roll out of the nut body from one end of the spiral groove and return to the other end of the raceway along the return pipe. Therefore, when the ball screw rotates relative to the nut to perform linear motion feeding transmission, the balls circulate in the spiral raceway. In general, the advantages of ball screw transmission far outweigh its disadvantages. Its unique advantages make it popular in the machine tool industry and occupy a huge market share.

 

总的来说，滚珠丝杆传动还是利远远大于其不足之处的，独特的优势使得其在机床行业中好评如潮，占有巨大的市场份额。

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Dalian Detai Ke buffer manufacturer, Maoming Precision Machinery, explains the correct installation method for Detai Ke buffers.

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Dalian HTPM Kate Precision Machinery Manufacturer Introduction: What product series does Kate Precision Machinery's rolling linear guideway have?

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