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Three kinds of guide rail differences of CNC machining center

Three kinds of guide rail differences of CNC machining center

Pulished on Dec. 26, 2019

The so-called OEM Aluminum CNC Machining Parts is also called CNC machining, which refers to a type of machining that is performed by a programmer after a computer is used to program the work orders that need to be processed. There are mainly three types of guide rails for CNC machining centers, and the differences between these three types of guide rails are relatively large. Therefore, if you need to choose the guide rails for CNC machining centers, it is best to understand the three types of guide rails in advance, so that you can better Select the guide rail for your CNC machining center. Here is the introduction of CNC Machining Parts Manufacturers' guide to the CNC machining center:

The guide rails can be divided into linear motion guides and circular motion guides according to their movement trajectories; they can be divided into main motion guides feed motion guides and adjustment guides according to their working characteristics; according to the friction properties of the contact surface, they can be divided into sliding guides, rolling guides and static pressure. 3 kinds of guide rails.

Slide rail has the advantages of simple structure, convenient manufacturing, good rigidity, high vibration resistance and so on. Traditional cast-iron, cast-iron-quenched steel guide rails have the disadvantages of a large static friction coefficient, dynamic coefficient of friction changes with speed, large friction losses, and creep at low speeds ((1-60mm / min /)). The positioning accuracy of moving parts is reduced, so it is no longer used on other CNC machine tools except economical CNC machine tools.

Rolling guides are rolling elements such as balls, rollers, and needles placed between the guide surfaces, so that the sliding friction between the guide surfaces become rolling friction. Compared with sliding guides, rolling guides have the advantages of high sensitivity, and their dynamic friction and static friction coefficients are slightly different, so the movement is stable, and crawling is not easy to occur when moving at low speed; (high positioning accuracy, repeated positioning accuracy can reach 02um; The friction resistance is small, the movement is light, the wear is small, the accuracy is maintained, and life is long. However, the rolling guide has poor vibration resistance and requires high protection.

Precision Aluminum CNC Machining Part

Precision Aluminum CNC Machining Part

Rolling guide is especially suitable for the occasions where the working parts of the machine tool require uniform movement, sensitive movement and high positioning accuracy. This is why rolling guides are widely used on CNC machine tools.

There is an oil cavity between the working surfaces of the two guide rails of the liquid hydrostatic guide rail. After the lubricating oil with a certain, the pressure is passed in, a hydrostatic oil film can be formed so that the working the surface of the guide rail is in pure liquid friction without wear and the accuracy is good; At the same time, the friction coefficient is extremely low, which greatly reduces the driving power; low speed, no crawling, large bearing capacity, good rigidity; in addition, the oil has a vibration absorbing effect and good vibration resistance. Hydrostatic guides can be divided into liquid hydrostatic guides and gas hydrostatic guides.

The disadvantage is that the structure is complicated, the oil supply system is required, and the cleanliness of the oil is high. Hydrostatic guides are increasingly used on machine tools. The NC turret punch hydrostatic guide can be divided into two types: open and closed. Our company also has Precision Aluminum CNC Machining Part on sale, welcome to consult.


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