What is the difference between the linear rail and the hard rail of a machining center?

The hard rail refers to the hard rail, and the linear rail is the linear rail. The hard rail refers to a casting in which 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 processed by quenching and grinding. There are also the bed and the guide rail not necessarily integrated. For example, the steel-inlaid guide rail is nailed to the bed after processing. Linear guides usually refer to rolling guides, which are the kind used in linear modules that are often used in the machine tool industry now. 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 internally circulating balls or rollers in the slider, and the length of the slide rail can be customized.

　　 The main difference between the two is that the hard guide rails can withstand larger cutting forces and are mainly used for machine tools above 1.3 meters. This type of machine tool is mainly used for mold processing, but the disadvantage is that the guide rail cannot move too fast. The linear guide rail bears relatively small cutting force, but the guide rail moves very fast. At present, the Z-axis movement speed of tapping rigs is generally around 60M. Such guide rails are mainly used in some relatively small machine tools. In terms of service life, linear guides are much higher than rigid guides.

　　 There is no good, only suitable.

　　 Both hard rail and linear rail have their advantages and disadvantages, so there is no saying which one is better, only the one that is suitable for enterprise production.

　　The hard rail has a large sliding contact surface, good rigidity, strong shock resistance, strong load-bearing capacity, and is suitable for heavy-duty cutting. Because of the large contact area of the guide rail, the machine tool runs more smoothly, which is suitable for machine tools with high requirements for machine vibration, such as grinders. The hard rail is dry friction. Due to the large contact surface, the friction resistance is also large, and the moving speed cannot be too fast. At the same time, crawling is easy to occur, and the gap on the moving surface will cause machining errors. The maintenance of the machine tool track is the top priority. Once the track is not sufficiently lubricated, it will cause the track to burn or wear out, which is fatal to the accuracy of the machine tool. So overall, the application of hard rail is suitable for heavy cutting, large molds, high hardness workpieces, and workpieces with general accuracy requirements.

　　Line rail assembly is simple, and high-quality assembly can be completed with a little training. The cutting force of the linear rail is smaller than that of the hard rail. Now the linear rails of many major factories have greatly improved their load-bearing capacity through some structural designs. Of course, compared with the load-bearing capacity of the hard rail, It is relatively small. Linear rail is suitable for high-speed machines, can be cut at high speed, suitable for processing products, small precision molds, fast running speed, high processing accuracy, low maintenance cost, and longer life than hard rails are all its advantages. And the linear rail is not perfect, it is inferior to the hard rail in terms of stability and rigidity, and it has higher requirements for the transportation and processing environment.

　　 To sum up, when choosing a machining center, you must choose the product that suits you according to your own needs and conditions, so that the processing effect can reach the ideal state.