Guide rail: a groove or ridge made of metal or other materials that can bear, fix, guide moving devices or equipment and reduce their friction. The longitudinal groove or ridge on the surface of the guide rail, used for guiding, fixing machine parts, special equipment, instruments, etc.. Guide rail is also known as slide rail, linear guide, linear slide rail, for linear reciprocating motion occasions, has a higher load rating than linear bearings, while can bear a certain torque, can be in the case of high load to achieve high precision linear motion.
The movement of the linear guide is completed by rolling, not only the friction coefficient is reduced to 1/50 of the sliding guide, dynamic, static friction resistance gap also becomes very small, complete the movement smoothly, reduce the impact and vibration, not easy to produce creeping phenomenon, beneficial to the progress of the response speed and flexibility of the CNC coefficient.
Because the linear guide movement friction is very small, only a small power, it can make the machine movement, obviously large machine power loss, and because of the friction generated little heat, is suitable for high-speed, frequent start and change of direction of the moving parts.
Linear guide is equipped with oiling cup on the slider, can be directly injected with oil to inject grease, can also be connected to the oil supply pipe to automatically supply oil machine smooth, so that its wear and tear to less, so that the machine can be a long time to adhere to the fine main work.
ina bearing agent said linear guide good dustproof performance, the ends of the slider is equipped with sealing end caps, the bottom can be selected to seal the bottom piece, while the slide fixed dowel holes with dustproof screw hole cover, to avoid the accumulation of dust, thus ensuring the life and performance of the product.
Due to the use of fine processing technology, high straightness of the slide rail, the slide rail in the device screw hole error less, easy to install, linear guide with interchangeability, can be changed separately slider or slider or even linear guide, you can make the machine again to high precision.
Linear guide with gothic four-point contact design, reasonable ratio of the circular groove, not only contact stress is small, load capacity and stiffness relative to the V-plane ball point contact is also greatly improved. Because the copper ball is symmetrical four-point beam system, can be loaded around all directions at the same time, and simply no deflection phenomenon, so the rigidity is stronger to maintain high precision.
(1) make the guide rail as close as possible to the liquid friction state work, in order to reduce friction resistance, reduce the driving power, improve efficiency.
(2) to reduce the wear of the guide rail, to prevent corrosion of the guide rail. The flowing lubricant also plays a flushing role.
(3) to avoid crawling phenomenon at low speed and heavy load, and reduce vibration.
(4) Reduce frictional heat at high speed and reduce thermal deformation.
Guide rails are protected by many methods, common guards as shown in Figure 1. CNC machine tools. Especially when cutting in the center, iron chips, coolant, a lot, very easy to enter the guide rail, increasing the wear and tear of the guide rail; iron chips, when the table lifted up to affect the accuracy of the guide rail, so usually use steel plate telescopic shield
Sliding guide has the advantages of simple structure, easy manufacturing and large contact stiffness. But the traditional sliding guide friction resistance, wear fast, dynamic and static friction factor difference, low-speed easy to produce crawling phenomenon. In order to improve the positioning accuracy and smoothness of movement of CNC machine tools, CNC machine tools have been widely used in CNC machine tools plastic guide rail. Its friction factor is small; and dynamic and static friction factor is similar, good smoothness of movement, can prevent low-speed crawling phenomenon; good wear resistance, self-lubricating effect and vibration resistance; good chemical stability; simple process, low cost.
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