Linear Guide Is Part Of CNC Cutting Machine

- May 26, 2017-

Linear rails are also known as rails, rails, linear guides, linear slides, for linear reciprocating applications, have a higher rated load than linear bearings, and can take a certain torque, can be achieved in high load conditions Precision linear motion. Linear Rail The role of linear motion guide is used to support and guide the moving parts, according to a given direction to do reciprocating linear motion.

Linear guide is the most important part of CNC cutting machine, it is a straight reciprocating motion for the tool, this tool has a straight line bearings do not have a higher rated load, Linear Rail but also can take a certain Torque, but also in the case of high load to achieve the same high precision linear motion, so that equipment smooth and accurate operation of the function.


The slider changes the movement from a curve to a straight line. The new rail system gives the blower a quick feed speed. The linear guide, like the planar guide, has two basic elements; one is a fixed element and the other is a moving element. As the linear guide is a standard component, Linear Rail for the blow molding machine factory. The only thing to do is to process the parallelism of a mounting rail and a calibration guide. As a guide rail for the hardened steel, after grinding placed on the installation plane. Compared with the plane guide, the linear guide cross-section of the geometry, complex than the plane guide, the reason is complex because the need to work on the guide groove, in order to facilitate the sliding element movement, groove shape and quantity, Linear Rail depending on the blow molding machine To complete the function. For example: a not only bear the linear force, but also to withstand the subversion of the rail system, and only bear the linear force compared to the guide. The design is very different.

When the mold of the blow molding machine moves, the ball is circulated in the support groove, and the wear of the bracket is distributed to each ball, thereby extending the service life of the linear guide. In order to eliminate the gap between the bracket and the guide rail, the preload can improve the stability of the rail system. The preload is obtained by installing an oversized steel ball between the guide rail and the bracket.Linear Rail Ball diameter tolerance of ± 20 microns, 0.5 micron increments, the ball filter classification, respectively, mounted on the rail, the size of the preload, depending on the role of the ball in the force. If the role of the ball on the force is too large, to withstand preload time is too long, resulting in increased movement resistance of the stent, there will be a balance problem; in order to improve the system sensitivity, reduce movement resistance, corresponding to reduce the preload , And in order to improve the movement accuracy and accuracy of the maintainability, require sufficient pre-negative, which is two contradictions.

Working time is too long, the ball began to wear, Linear Rail the role of the ball on the preload load began to weaken, resulting in blow molding machine parts movement accuracy reduction. If you want to maintain the initial accuracy, you must replace the rail bracket, or even replace the rail. If the rail system has been preloaded. System accuracy has been lost, the only way is to replace the rolling element.

The design of the rail system is designed to maximize the contact area between the fixed element and the moving element, which not only improves the carrying capacity of the system, but also allows the system to withstand the impact of intermittent or gravitational cutting, The area of force. In order to achieve this, the groove system of the groove system has a variety of shapes, there are two representative, one called Gothic (pointed arch), the shape is a semi-circular extension, the contact point for the vertex; Species for the arc, the same can play the same role. No matter what kind of structure, the purpose of only one, and strive to more rolling ball radius and guide rail contact (fixed element). The factors that determine the performance characteristics of the system are: how is the rolling element in contact with the guide rail, which is the key to the problem.

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