Machine tool core---linear guide

- Oct 25, 2019-

Machine tool core---linear guide

A part that supports and guides a moving member to move along a certain trajectory is called a guide rail pair, and is often referred to simply as a guide rail. The moving parts of the moving parts have straight lines, circles or curves, the rolling circular guides can be used to roll the thrust bearings, and the curved guide rails are rarely used in machinery. The guide rail is a very important part in the machine and is especially important in machine tools. The machining accuracy of the machine tool is directly related to the accuracy of the guide rail. For the precision machine tools produced in small batches, the machining work of the guide rails accounts for about 40% of the total machining workload of the machine tool. Moreover, once the rail is damaged, maintenance is very difficult. According to the kinematics principle, the so-called guide rail is a device that constrains the moving member to only one degree of freedom. The guide rail surface of the guide rail pair disposed on the support member is a guide surface, which is called a static guide rail, which is relatively long; the other guide rail surface is disposed on the moving member, which is called a movable guide rail, which is relatively short. The moving member with the moving rail is often called the worktable, the sliding table, and the common rail surface has a plane and a circular arc surface. The circular arc guide surface constitutes a cylindrical guide rail; different flat guide rail faces are combined, and the friction between the rectangular guide rail faces is called a slide guide for sliding friction, and a rolling element is placed between the guide rail faces, so that friction is converted into rolling friction. Rolling rails. The guide rails are available in closed and open styles. Closed rails can withstand overturning moments, while open rails cannot.

 

       In 2015, China introduced "Made in China 2025" and comprehensively promoted the implementation of the strategy of strengthening the country. This is the first ten-year action plan for China's implementation of the strategy of manufacturing a strong country. It emphasizes accelerating the promotion of the integration of next-generation technology information and manufacturing technology, and intelligent manufacturing. As the main direction of the integration of the two depths.

 

       In intelligent manufacturing, machine tools are known as industrial “master machines”. In particular, CNC machine tools have increasingly become the main processing equipment for equipment manufacturing. The number of them and the level of technology are not only an important indicator of the development level of a regional equipment manufacturing industry. It is also an important manifestation of a country's competitiveness.

 

       Linear guides for hardware parts play an important role in machine tools. A linear guide is a guide rail that transmits motion from a specified point to the next point. The guide rail can ensure that the CNC machine tool has relatively high machining precision and large bearing capacity, but at the same time the machine tool requires the guide rail to have high precision, sufficient rigidity and good wear resistance.

 

       Manufacturing is the cornerstone of modern industry. With the revolutionary breakthroughs and cross-integration of important fields and frontiers such as information technology, new energy and new materials, a new round of industrial transformation is being triggered. As the core body of the industrial mother bed, the guide rail plays a key role in promoting the development of the manufacturing industry.

 

       First, the function of the guide rail

       Although the form of the rail system is varied, the nature of the work is the same, and the machine tool's working parts move on the designated rail system, just as the train travels along the rail in the specified direction. It mainly reflects the following three basic functions:

 

1. Guide the movement of the carrier;

 

2. providing a smooth moving surface for the carrier;

 

3. Transfer the force generated by the cutting of the machine tool to the foundation or the bed to reduce the impact of the impact on the passively machined parts. Along the movement of the rail system, most of them are linear motions, and a few are arc motions. Many techniques for linear guides can directly apply curved guides.