The mainstream trend of high-precision vertical machining centers. In the past 30 years, the world-wide machine tool technology has been developed to a great extent, and the development trend of machine tool technology has also shown diversified characteristics, such as the trend of high precision, the trend of high-speed movement, the trend of multi-axis, The trend of high reliability, the trend of multi-functionality, the trend of reconfiguration, the trend of low energy consumption and environmental protection, and the trend of intelligence, etc., but in all trends, the trend that can reflect the mainstream development should be high precision and intelligence the trend of. The high-precision vertical machining center uses a DC or AC main shaft control unit to drive the main shaft, and performs stepless speed change according to control instructions. There is no need to use multi-stage gear pairs to change the main shaft. In order to expand the speed range, a first-stage gear pair is generally used to achieve stepless speed regulation. Even so, the structure in the headbox is much simpler than traditional lathes. Another structural feature of the vertical machining center is its large rigidity, which is to match the high-precision control of the control system in order to adapt to high-precision machining.
The moving resistance of the machine tool table (or tool holder) of the vertical machining center is too large, which is generally caused by the excessive adjustment of the inserts and the poor lubrication of the machine tool guide rail surface. This failure phenomenon is generally manifested as irregular changes in the size of parts within a few wires. The inspection can be carried out by observing the size and change of the position deviation of DGN800-804. Usually, the difference is large when the forward and reverse directions are stationary. Such failures only need to re-adjust the molding and improve the lubrication of the guide rail. The rolling bearings of the vertical machining center are worn or adjusted improperly, resulting in excessive movement resistance. This fault phenomenon is also usually manifested as an irregular change in size within a few threads. The inspection can be carried out by the position deviation of DGN800-804, the method is the same as above. Such failures only need to replace the worn bearings and carefully adjust, the failure can be eliminated. The screw clearance or clearance compensation amount of vertical machining center is improper, and the fault can be eliminated by adjusting the clearance or changing the clearance compensation value
After this project has occupied the domestic market, this product will drive the overall market price of gear machine tools to drop. In this way, machine tool users will save the cost of purchasing equipment while using better performance and higher precision machine tools. Benefits and development speed, at the same time, strengthened the enterprise’s confidence in domestic machine tools, and promoted the development and growth of local machine tool enterprises. my country has formulated the accuracy standards for the vertical machining center machining center, and the vertical machining center lifting table machining center has professional standards. The standard stipulates that the positioning accuracy of its linear motion coordinates is 0.04/300mm, the repeat positioning accuracy is 0.025mm, and the milling precision is 0.035mm. In fact, the factory precision of the vertical machining center has a considerable reserve, which is about 20 less than the standard tolerance value. Therefore, from the perspective of precision selection, the general CNC machining center can meet the machining needs of most parts. For parts with higher precision requirements, a precision CNC machining center should be considered.