Hiwin HG Series Linear Rails

The linear guide system enables the machine tool to achieve fast feed speed, which is a characteristic of linear guides when the spindle speed is the same. Linear guide rail is the same as flat guide rail, with two basic components; One serves as a fixed component as a guide, and the other is a moving component. Due to the fact that linear guides are standard components, for machine tool manufacturers, the only thing they need to do is to process the plane of a device guide and adjust the parallelism of the guide. Of course, in order to ensure the accuracy of the machine tool, a small amount of scraping and grinding of the bed or column is essential. The guide rail used as a guide is made of hardened steel, which is finely ground and placed on the device plane.

Compared with flat guide rails, the geometric shape of the cross-section of linear guide rails is more chaotic. The reason for the disorder is that grooves need to be machined on the guide rails to facilitate the movement of sliding components. The shape and quantity of grooves depend on the function that the machine tool needs to complete. The moving and fixed components of the linear guide do not use a central medium, but instead use rolling steel balls. Due to its suitability for high-speed motion, low friction coefficient, and high sensitivity, rolling steel balls meet the operational requirements of moving parts such as tool holders and drag plates in machine tools. The basic function of the fixed component (guide rail) of the linear guide system is like a bearing ring, a bracket for installing steel balls, and has a "v" shape. The bracket wraps around the top and sides of the guide rail.

In order to support the operating components of the machine tool, a set of linear guides has at least four brackets. Used to support large operational components, the number of supports can exceed four. When the operating components of the machine tool move, the steel balls circulate in the groove of the support, distributing the wear of the support to each steel ball and extending the service life of the linear guide rail. In order to eliminate the gap between the bracket and the guide rail, preloading can improve the stability of the guide rail system. The acquisition of preloading is achieved by installing oversized steel balls between the guide rail and the bracket. The diameter tolerance of the steel ball is ± 20 microns, with increments of 0.5 microns. The steel balls are sorted and installed on the guide rail, and the size of the preload depends on the effect force on the steel ball. If the effect force on the steel ball is too strong and the steel ball is subjected to preloading for too long, it will cause an increase in the resistance of the bracket movement. There are various shapes of grooves in the guide rail system, with two representative ones. One is called the Gothic (pointed arch), which is an extension of a semicircle with the contact point as the vertex; The other type is circular arc shape, which can have the same effect. Regardless of the structural method, there is only one intention, which is to strive for more rolling steel ball radius and contact with the guide rail (fixed element).

HG Series,Linear Rails