The basic components of CNC milling machine

• The main engine, the subject of CNC machine tools, including machine parts such as machine body, column, spindle, and feed mechanism. Mechanical components used to complete various cutting operations.

• The numerical control device is the core of the numerical control machine tool, including hardware (printed circuit board, CRT display, key box, paper tape reader, etc.) and corresponding software, which is used to input the digital part program and complete the storage of input information, Data transformation, interpolation operation and realization of various control functions.

• Drive device, drive components of CNC machine tool actuators, including spindle drive unit, feed unit spindle motor and feed motor, etc. The main shaft and feed drive are realized by electrical or electro-hydraulic servo system under the control of numerical control device. When several feeds are linked, the processing of positioning, straight line, plane curve and space curve can be completed.

• Auxiliary devices, some necessary supporting components of index control machine tools, to ensure the operation of CNC machine tools, such as cooling, chip removal, lubrication, lighting, monitoring, etc. Including hydraulic and pneumatic devices, chip removal devices, exchange tables, CNC turntables and CNC indexing heads, as well as tools and monitoring and testing devices.

• Programming and other auxiliary equipment can be used to program and store parts outside the machine.

Features of CNC milling machine

Processing characteristics

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.

Size

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.

Precision

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.

Batch

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.

Conclusion

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