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For the processing parts that are frame-shaped planes or steps of different heights, the CNC milling machine with point-line system can be used. If the machining part is a surface contour, the two-coordinate linkage and three-coordinate linkage system should be selected according to the geometry of the surface.
It is also possible to add a CNC indexing head or a CNC rotary table on the basis of the general CNC milling machine according to the requirements of parts processing. At this time, the system of the machine tool is a four-coordinate CNC system, which can process spiral grooves, blade parts, etc.
The small-sized lifting table CNC milling machine has a worktable width of less than 400mm, which is most suitable for the processing of small and medium parts and the contour milling of complex surfaces. Larger specifications such as gantry milling machines, with a worktable above 500-600mm, are used to solve the processing needs of large and complex parts.
China has formulated precision standards for CNC milling machines, among which CNC vertical milling machine lifting table milling machines have 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 machine tool has a considerable reserve, which is about 20% lower than the tolerance value of the national standard. Therefore, from the perspective of precision selection, general CNC milling machines can meet the processing needs of most parts. For parts with high precision requirements, you should consider choosing a precision CNC milling machine.
For large quantities, users can use special milling machines. If it is a small and medium batch and it is often put into production periodically, it is very suitable to use a CNC milling machine, because the multi-tools, programs, etc. prepared in the first batch can be stored and reused. In the long run, it is inevitable that a milling machine with a high degree of automation will replace the ordinary milling machine, which will reduce the workload of the laborers and increase the productivity.
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