Which is better, hard rail cnc machining center or linear rail cnc machining center?

We often hear about CNC machining centers with linear rails and hard rails. What is the difference between the two? Which one is better to use? I believe that many people in the industry don’t know, let’s take a look at what is with Hongweisheng today. Hard rail machining center meter, what is the line rail machining center meter, what is the difference between the two, and which one is better to use.

1. Hard rail machining center

Generally, the guide rail and the bed are cast in one piece, the material number is generally not lower than HT250, and the Brinell hardness of the machine body is between HB180-HB240 between. After the guide rail part is quenched by high frequency or super audio frequency, the hardness will generally be above HRC50°, so that it has excellent wear resistance (steel-inlaid guide rail is also classified as a kind of hard rail). The hard rails used in CNC machining centers are generally rectangular in structure, which is what we often call rectangular guide rails; High;

The main disadvantages are: due to the large contact surface, the friction resistance is also large, the wear is fast, the moving speed is limited, and the crawling phenomenon is prone to occur. Therefore, most machining center manufacturers use the guide rail plastic coating process to reduce the wear and crawling defects of the hard rail;

Second, the CNC precision machining of the line rail

Its full name is linear guide CNC machining center, which refers to tumbling guide. There are two common structures: ball guide rail and roller guide rail. The difference is that the ball guide rail is a point contact type, and the roller guide rail is a line contact type. Its principles are the same, and the same is to roll on the guide rail to drive the slide.

The advantages are shown in the following aspects:

1. The linear guide rail is supported by the rolling parts, and its rolling sliding function is stronger than the friction sliding function of the hard rail, and there is no crawling phenomenon;

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2. In the same way, due to the small friction coefficient, the wear is small;

3. Because of its small friction coefficient, the moving speed is fast;

4. Later repairs Convenience, after the guide rail is worn, the line rail is easy to replace, and the hard rail is more troublesome, because the gap needs to be adjusted; Also higher;

The main disadvantages are: due to its small contact surface, its rigidity is lower than that of the hard rail;

3. Which is better, line rail or hard rail CNC precision machining meter?

The line rail has fast speed and high precision, suitable for high-speed machines, capable of high-speed cutting, and suitable for processing small and fine molds. Line rails can be preloaded to achieve zero clearance between rails. The hard rail belongs to dry friction, with large load and high strength, suitable for heavy cutting. Hard rail movement can only move if there is a gap on the moving surface, and the friction coefficient is large, which is prone to sticking, resulting in processing errors, and is mostly used in the case of heavy loads. It is suitable for machining workpieces with high hardness and low precision requirements.

In fact, there is no difference between hard rail and linear rail, it can only be said whether it is suitable or not. Due to their different processing focuses, the line rail machining center gauge tends to process workpieces with small hardness and high precision, and the hard rail machining center gauge focuses on the processing of workpieces with low hardness and high precision requirements, so the processing manufacturer should be based on their own product types. to choose the right machine tool;

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