What are the characteristics of CNC milling machines

Release time:

2023-03-14 09:47

What are the characteristics of CNC milling machines?

1. Processing characteristics

For processing parts that are frame-shaped planes or steps of unequal height, then the point-position---linear system CNC milling machine can be used. If the processing part is a curved surface contour, the two-coordinate linkage and three-coordinate linkage system should be selected according to the geometric shape of the surface. It is also possible to add a numerical control indexing head or numerical control rotary table based on the general numerical control milling machine according to the processing requirements of the parts. At this time, the system of the machine tool is a four-coordinate numerical control system, which can process spiral grooves and blade parts.

2. Size

The lifting table type CNC milling machine with smaller specifications has a worktable width of less than 400mm, which is most suitable for the processing of small and medium-sized parts and the task of contour milling of complex shapes. Larger specifications such as a gantry milling machine, with a worktable above 500-600mm, are used to solve the processing needs of large-scale and complex parts.

3. Accuracy

my country has formulated the accuracy standards for CNC milling machines, among which CNC vertical milling machines have professional standards for lifting table milling machines. 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 allowable error 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 higher precision requirements, a precision CNC milling machine should be considered.

4. Batch

For large quantities of items, special milling machines can be used. If it is a small-to-medium batch and it is frequently and repeatedly put into production periodically, then the use of a CNC milling machine is very suitable, because the multi-tool fixtures, programs, etc. prepared in the first batch can be stored and reused. From a long-term perspective, it is inevitable that milling machines with a high degree of automation will replace ordinary milling machines, reducing labor and increasing productivity.