The main types and characteristics of rolling linear guide function components

The commonly used three kinds of linear motion guide basic performance is shown in table 1. The running speed of rolling linear guide has amounted to 300 m/min. In Europe and the United States more than two-thirds of high speed nc machine tools are used the linear rolling guide, has been more and more widely in all kinds of modern mechanical equipment applications. Rolling features are for ball or roller, roller commonly used scroll feature has the following kinds: 1, the linear rolling guide vice brief: features: contact with circular arc grooved roller, compared with the point contact bearing capacity is big, good rigidity small friction factor, general is 0. 002-0. 005, only 5% ~ 2% for sliding guide, save power, can withstand a load of the up and down or so four directions. Dynamic and static friction difference is very small. Wear small, long life, easy installation, maintenance, lubrication. Allows the movement speed of slide guide rail is more than ten times, no impact on the flexible and movement, in low-speed trace feed, can well control position and size, not happen idling skid, and can realize superfine m level precision feed. Diagram 2, linear rolling guide vice: features: low friction factor, only 0. 001-0. 004, save power. Trace mobile flexible and accurate, and had no peristaltic crawling at low speed. High precision, long stroke, speed is fast. Have the adjustment ability, can reduce parts machining accuracy. Easy maintenance, lubrication. Guide rail and guide sleeve and cylindrical, low cost, but with roller shaft is point contact, carrying capacity is small, suitable for high accuracy requirement, the load is lighter. Diagram 3, rolling spline pair: features: small friction resistance, friction factor in 0. 002-0. 003, can be high speed rotary or linear reciprocating motion ( Speed can reach more than 100 m/min) 。 Almost has nothing to do with speed, friction resistance in low-speed micro reciprocating motion, won't appear the crawling phenomenon. Ball diameter size can be changed using the way of applying preload, eliminate positive &negative clearance, to reduce the impact and improve the rigidity and motion accuracy, high carrying capacity, long life, good accuracy stable. 4, rolling guide block diagram: features: for cylindrical roller, roller bearing capacity is about more than 10 times of ball bearing small friction factor in 0. 005-0. 01, narrow the difference between the dynamic and static friction factor and the repeated start, stop, reverse and high frequency can reduce the weight and power consumption, no slippage. Under the condition of overloading or load can realize smooth movement. Accurate, high sensitivity, low speed when fine-tuning control without crawling, rolling when good guidance, mechanical servo and position precision can be improved. Lubrication system is simple, easy installation and adjustment. Without being limited by the bed length, can be selected according to the bearing size block guide block is widely used in NC, CNC machine tools in planar linear motion mechanism.