What are the advantages of vertical machining center

Although the traditional machine tool is cheaper than the vertical machining center, the value of the vertical machining center is reflected in the production efficiency. A good design process determines that the vertical machining center has more advantages than the traditional machine tool. Let's divide the specific advantages.

1, Guangdong vertical machining center has a higher static and dynamic style. The efficiency of vertical machining center is higher than that of traditional machine tools, which requires measures to be taken to greatly reduce the processing time of single piece. The compression time includes two aspects: on the one hand, the development of new tool materials, such as the doubling of cutting speed, greatly restored the official cutting time; on the other hand, the use of automatic tool change system to transform the operation, greatly reducing the auxiliary time. These measures have greatly improved the production efficiency and achieved good economic benefits, but the design structure has also significantly increased the load of the machine tool and the machining center. Considering these, the basic large parts usually adopt the closed box structure, and the reasonable arrangement The reinforcing plate and the reinforcement effectively contact En and Jingen. In addition, adjusting the mass of parts may change the natural vibration frequency of the system, and increasing damping can improve the damping characteristics of the machine tool, which is an effective measure to improve the dynamic behavior of the machine tool.

2. The vertical machining center has static stiffness. The structural stiffness of machine tool bed, guide rail, worktable, tool rest and spindle box will affect its own geometric accuracy. Due to these factors, CNC machine tools are required to have high static stiffness. The vibration in the cutting process not only directly affects the machining accuracy and surface quality of the parts, but also reduces the tool life and affects the continuous operation of the machining center. It cannot be adjusted in the machining process (such as replacing the cutting amount or changing the geometric angle of the tool) to eliminate or reduce Vibration, therefore, the dynamic stiffness of the machining center must also be improved.

3. The thermal deformation of the vertical machining center is small. In the process of internal and external heat such as cutting heat and friction heat, the parts will produce different degrees of thermal deformation, which will affect the accuracy of the work. Because the spindle speed, feed speed and cutting capacity of the machining center are greater than those of traditional machine tools, and the process is automated, often continuous processing, and the temperature rise is controlled by the heat generated by liquid cooling, cold purchase and other methods. The structure of the machine tool is improved, so that the thermal deformation of the parts occurs in the non-error-sensitive direction.

4. The friction of the moving parts of the vertical machining center is small, eliminating the gap of the transmission system. The displacement of the machining center table takes the pulse equivalent as the minimum unit, in the case of the knife, the speed of movement. This requires that the worktable can accurately respond to the instructions issued by the numerical control device, which is related to the friction characteristics of the moving parts. The machining center adopts the rolling guide, the static friction force of the rolling guide is small, and under the action of the lubricating oil, the friction force decreases with the increase of the speed, effectively avoiding the low-speed crawling phenomenon, thus improving the machining centrality and positioning accuracy. The use of a ball screw instead of a slide screw in a feed system is based on the same principle. In addition, the use of pulse compensation device for pitch compensation, clearance transmission system, as well as some non-clearance transmission pair of machine tools.

5. The vertical machining center has high service life and good precision retention. The good lubrication system ensures the service life of the vertical machining center. The guide rail, feed screw and spindle parts adopt the new wear-resistant center, which can maintain good accuracy in the long-term use process.