How linear guides evolved

- Feb 09, 2020-

How linear guides evolved

With the strong support of our country, the numerical control manufacturing industry has been effectively developed and improved. On the whole, there is an upward trend, and automation of machinery and equipment has become more and more popular. Xiaobian learned that with the advent of intelligence, the adoption of linear guide rail components has become widespread, and many companies are taking action. So how did it evolve? Listen to Xiaobian's analysis for everyone.


       The evolution of linear guides started with linear bearings. However, ball linear bearings are not in the rolling grooves. The combination of linear movements has a short life because it cannot transmit torque and load capacity. It then evolved into a ball, and contained a ball guide rod, which could only be fixed in the cylinder at both ends, which was affected by radial loads and distortion. So its stiffness is poor, so it has evolved into a linear slide.


       The sliding guide rail used by the linear guide rolling body is a kind of infinite loop behavior. It intersects with the slider and constrains the guide rail. The slider moves along a high-speed straight line with high accuracy. Running on the guide rail of the chute, there will be a fixed bolt hole locked in the machine tool equipment, which has the characteristics of high rigidity, high load and high precision. It is currently a common transmission element.


       Due to the different structures of the internal rolling elements, this can be divided into two types: ball and roller. From the rolling element and contact state, it can be divided into: Gothic arc four-point contact, arc two-point contact, and line contact roller type. And other ways. When the linear guide is in the installed state, even if the installation surface has a certain difference, the slider has a reciprocating motion due to the ball's ability to adjust. When the contact roller is at the center of the circle, it is called a decibel back-to-back configuration. The rolling elements and the anti-rolling force usually interact. From this moment, we know that the linear guide is a rolling moment and can maintain good rigidity.