hard rail
The hard rail refers to the casting where the guide rail and the machine 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 through quenching and grinding. There are also cases where the bed and the guide rail are not necessarily integrated. For example, the steel-inlaid guide rail is nailed to the bed after processing.
Line rail
Linear rails usually refer to rolling guides, which are the kind 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. There are internal circulating balls or rollers in the slide block, and the length of the slide rail can be customized. It is a modular component, a standardized and serialized individual product produced by a specialized manufacturer. It can be installed on a machine tool and can be disassembled and replaced after wear. Most of the machine tools in the field of finishing use high-precision linear rails as machine tool guide rails, which also greatly ensures the processing accuracy of the machine tools.
€€Is the machining center using hard rails better? Or is it better to use linear rails?
In fact, there is no difference between hard rail and linear rail. I can only say whether they are suitable or not, because they have different focuses. Let's take a look at their respective pros and cons.
1. Advantages, disadvantages and applications of hard rails
The hard rail has a large sliding contact surface, good rigidity, strong earthquake resistance, and strong load-bearing capacity, and is suitable for heavy-load cutting. Hard rails belong to 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 phenomenon is easy to occur, and gaps on the moving surface will lead to processing errors. Maintenance of machine tool rails is a top priority. Once the rails are insufficiently lubricated, it will cause the rails to burn or wear excessively, which are fatal to the accuracy of the machine tool.
The application of hard rails is suitable for heavy cutting, large molds, high hardness workpieces, and workpieces with average accuracy requirements.
2. Advantages, disadvantages and applications of linear rails
Nowadays, many machine tools run extremely fast, especially the idle speed. This is largely due to the contribution of linear rails. After preloading, the linear rails can achieve zero gap between rails and high precision. In terms of service life, the linear rails The rails are much higher than the hard rails. The cutting force of linear rails is smaller than that of hard rails. However, for hard rails, the linear rails of many machine tools have greatly improved their load-bearing capacity.
The application of linear rails is suitable for high-speed machines, can cut at high speeds, and is suitable for processing products and small precision molds. Today, more precision machining centers use linear rails.
