Rolling guide rail for cnc machining lathe
by：QY Precision 2020-04-14
The rolling guide pair of cnc machining lathe is to arrange a rolling body between the guide face to make rolling friction between the guide faces. The rolling guide rail has a small friction coefficient (Generally at 0. 003 or so) , Dynamic and static friction coefficient difference is small, and is almost not affected by motion changes, high positioning accuracy, high sensitivity, good precision retention and other advantages. The rolling guide rails commonly used in modern CNC machine tools include rolling guide blocks and linear rolling guide rails. Rolling guide rail 1 of cnc machining lathe, rolling guide rail block, also known as rolling guide rail support block, is a rolling guide rail with rolling body for cyclic motion, mostly used for medium load, the structural type is shown in the figure. 1 is a protective plate, end Cover 2 and guide piece 4 guide carcass (Roller 3)Return, 5 is the holder and 6 is the body. When in use, the rolling guide blocks are installed on the guide rail surface of the moving parts. At least two pieces are used for each guide rail. The number of guide rail blocks depends on the length of the guide rail and the size of the load, the matching guide rails are mostly inlaid steel quenching guide rails. When the moving part moves, the roller 3 rolls between the guide rail surface of the supporting part and the body 6, and at the same time rolls around the body 6, and the roller 3 does not contact the guide rail surface of the moving part. Rolling guide blocks are produced by professional manufacturers and have various specifications and types for customers to choose from. The rolling guide block is characterized by high rigidity, large carrying capacity and easy disassembly. 2. Linear rolling guide rail linear rolling guide rail, also known as Unit linear rolling guide rail, is a new rolling guide rail in recent years. Its structural type is shown in Figure 6-22 as shown. It consists of rail body 1, slider 7, Ball 4, Holder 3, end cover 6, etc. When in use, the guide rail is fixed on the non-moving part and the slider is fixed on the moving part. When the slider moves along the guide rail body, the ball rolls in the circular arc straight groove between the guide rail body and the slider, and continuously circulates from the workload area to the non-workload area through the rolling channel in the end cover, thus, the movement between the guide rail body and the slider is turned into a ball rolling. The linear rolling guide rail is generally assembled by the manufacturer. Its outstanding advantage is that there is no gap. Compared with the general rolling guide rail, it has the following characteristics :(1) With self-adjustment capability, the allowable error of the installation base surface is large; (2)High manufacturing precision; (3) Can run at high speed, the running speed can be greater than 10 m/s; (4)Can maintain high precision for a long time; (5)The load can be preloaded to increase stiffness. The linear rolling guide rail is divided into four Precision grades, namely, Grades 2, 3, 4 and 5, with the highest precision of grade 2 and decreasing in sequence.