Advantages and disadvantages of hard rails in machining centers

A machining center is a precision machine for product production, usually divided into vertical machining centers, horizontal machining centers, and gantry machining centers. When cnc tungsten manufacturing, machining centers usually use two types of tracks, one is hard track, and the other is line track. Generally speaking, hard rails are suitable for processing molds and are suitable for mass production. So what are the advantages and disadvantages of hard rails in machining centers? Today, the editor will give you a brief introduction!

Advantages of hard rails:

  • 1. Capable of withstanding large loads, suitable for rough machining machines with large cutting and feeding volumes.
  • 2. Due to the large contact area of the guide rail, the machine tool operates more smoothly and is suitable for machine tools such as grinders that require machine vibration.

Disadvantages of hard rails:

  • 1. The material is uneven and usually formed by casting. The material is prone to casting defects such as sand, air holes, and looseness. These defects exist on the guide rail surface, which has a negative impact on the guide rail life and machine tool accuracy.
  • 2. The processing difficulty is relatively high. Due to the fact that this type of guide rail is generally connected to the main components of the machine tool, such as the base, column, workbench, saddle, etc., during processing, it is difficult to control the process links such as shape and position tolerance, roughness requirements, aging treatment, quenching treatment, etc., resulting in the processing quality not meeting the assembly requirements.
  • 3. Assembly is difficult, and the term ‘assembly’ means both assembly and assembly. The process of assembly is a combination of technology and physical strength, which cannot be completed by ordinary workers. It requires assembly workers who have relatively more skills and a good grasp of the overall accuracy of the machine tool to complete it. At the same time, they also need to be equipped with shovels, rulers, angle rulers, square rulers, dial indicators, and other related tools to complete it.
  • 4. The service life is not long, which can only be relatively speaking. Under the same maintenance and usage conditions, the service life of hard rails is generally shorter than that of wire rails, which is closely related to their movement mode. Hard rails use sliding friction operation, while wire rails use rolling friction operation. From the perspective of friction, the friction force of hard rails is much greater than that of wire rails, especially when lubrication is insufficient, the friction force of hard rails is greater.
  • 5. The maintenance cost is too high, and the maintenance of hard rails is much higher than that of wire rails in terms of difficulty and maintenance cost. If the scraping amount is insufficient, it may involve the complete dismantling of large parts of the machine tool, re quenching treatment and mechanical processing, and even the need to recast large parts. The wire gauge only needs to be replaced with the corresponding wire rails, which will not greatly affect the use of related large parts.
  • 6. The operating speed of machine tools is relatively low, and hard rails are usually unable to withstand too fast operating speed due to their movement mode and the excessive friction they bear, which contradicts the current machining philosophy. Especially many impeller machining factory workers do not have corresponding maintenance knowledge for machine tools. Most of the time, they only know how to use the machine tool, but to a large extent, they neglect the maintenance of the machine tool. The maintenance of machine tool tracks is the most important. Once the rail lubrication is insufficient, it will cause the rail to burn or wear excessively. These are fatal injuries to the accuracy of machine tools.