What is a hard track? What is a line track?
The hard rail refers to a casting piece in which the guide rail and the bed are integrated, and then the guide rail is machined on the basis of the casting. That is, the shape of the guide rail is cast on the bed body, and then the guide rail is processed by quenching and grinding, and the bed body and the guide rail are not necessarily integrated, for example, the steel guide rail is processed and nailed to the bed body.
Line rails are usually referred to as rolling guides, which are the ones used in linear modules that are often used in the machine tool industry. We usually call such components "linear guides".
The linear guide itself is divided into two parts: the slide rail and the slider. The slider has internal circulating balls or rollers, and the length of the rail can be customized. It is a modular component and is a standardized series of individual products produced by a special manufacturer. It can be mounted on a machine tool and can be removed and replaced after wear.
Most of the machine tools in the field of finishing use high-precision wire rails as machine guides, which also greatly guarantees the machining accuracy of the machine tools. Imported German Rexroth, Japan THK, domestically better Nanjing Craft, Hanjiang line, Taiwan silver, etc.
Is the machining center a good hard track? Is it still good for the track?
In fact, there is nothing good about hard tracks and rails. It can only be said that it is not suitable because they have different priorities. Let's take a look at their respective strengths and weaknesses.
1. Advantages, disadvantages and applications of hard tracks
The hard rail sliding contact surface is large, the rigidity is good, the earthquake resistance is strong, and the bearing capacity is strong, which is suitable for heavy load cutting.
The hard rail is dry friction, and the frictional resistance is also large due to the large contact surface, and the moving speed cannot be too fast. At the same time, creeping is easy to occur, and there is a gap in the moving surface, which may cause processing errors. The maintenance of the machine track is a top priority. Once the track is not fully lubricated, it will cause the track to burn or wear, which is fatal to the accuracy of the machine.
The application of hard rail is suitable for heavy cutting, large molds, high hardness workpieces, and workpieces with high precision requirements.
2. Advantages and disadvantages of line rail and its application
Nowadays, many machine tools run extremely fast, especially the free-wheel speed. This is largely due to the merit of the line rail; the line rail can be pre-tightened to achieve zero clearance between the rails with high precision; in terms of service life, the line The track is much higher than the hard track.
The line bearing the cutting force is smaller than the hard track, but for the hard track, in fact, many machine tool line rails have greatly improved the carrying capacity.
The application of the line rail is suitable for high-speed machines, high-speed cutting, suitable for processing products, small precision molds. More precision machining centers today use wire rails.