Hardened guide rail &Linear guide rail

Many customers do not know how to choose guide rails when purchasing machines.What are the advantages and disadvantages of  hardened guide rail and linear guide rail ? Let’s find out together.

Linear guide rail

linear guide rail is rolling friction, point or line contact, small contact surface, small friction, mainly used in high-speed processing, mold industry. Machining for small cutting amount and fast cutting. The moving parts of the line rail machine tool are all embedded on the slider, and the slider is rolled with balls or rollers. When the cutting force is large, it is easy to cause resonance, harsh sound, and vibration, which damages the accuracy of the machine tool. one of the reasons

advantage:

1. The friction coefficient of linear guide rail is small, the wear is relatively small, and the moving speed is fast.

2. Generally, the linear guide rails are made of better materials and more precise equipment, so their precision is also higher.

3, the later maintenance is convenient.

Disadvantages: Due to its small contact surface, its rigidity is lower than that of hard rails.

rail

Hardened guide rail:

The X, Y, and Z axis feeds of the hard rail machining center are all designed with hard rails. The sliding surfaces of the three-axis guide rails are all treated by high frequency quenching and then finely ground. It is fully lubricated, which greatly increases the service life of the machine tool guide rail and also increases the stability of the machine tool accuracy.

The hard rail is sliding friction, which belongs to surface contact. The contact surface is large, the friction force is large, and the speed of fast movement is slow.

advantage:

Large contact surface, strong rigidity and high stability. When machining cast iron and steel castings, the amount of cutting tool is large, the cutting force is relatively large, and the vibration is relatively severe. Because the hard rail surface is in contact with the surface, the contact surface is large, and the shock absorption is relatively good, which can not only ensure the processing efficiency but also ensure the processing efficiency. precision.

Disadvantages:

Due to the large contact surface, the friction resistance is also large, the wear is fast, the moving speed is limited, and the machining accuracy of the hard rail machining center is low.

rail2

The hard rail machining center refers to the casting that the guide rail and the bed are integrated, and then the guide rail is processed on the basis of the casting. That is, the shape of the guide rail is cast on the bed, and then the guide rail is processed after quenching and grinding. There are also guide rails that are not necessarily integrated with the bed and the guide rail. For example, the inlaid steel guide rail is nailed to the bed after processing.

Linear guides rail usually refer to rolling guides, which are the ones used in linear modules that are often used in the machine tool industry. We usually call this type of components “linear guides”.

The linear guide itself is divided into two parts: the slide rail and the slider. There are balls or rollers with inner circulation in the slider, and the length of the slide rail can be customized. It is a modular component, which is a standardized and serialized separate product produced by a specialized manufacturer, which can be installed on the machine tool and can be disassembled and replaced after wear.

In short, when machining cast workpieces, hard rails are better, especially when roughing and finishing are done together. If only finish machining is done, the line rail is good, and the line rail moves quickly, which can save non-processing time in mass processing.


Post time: Jan-27-2022