Different types of CNC machine tools have other uses. Before choosing CNC machine tools, you should understand their styles, specifications, performance, characteristics, benefits, and application scope to select the most suitable CNC machine tools for machining parts. According to the aspects of CNC machining and many application practices at home and abroad, CNC machine tools are usually most suitable for processing parts with the following characteristics.

1. Parts produced in multiple varieties and small batches or parts in trial production of new products.With the gradual decline of the manufacturing cost of CNC machine tools, processing large quantities of parts has also emerged, whether at home or abroad. When processing small batches and single-piece production, it is also possible to shorten the program’s debugging time and the tooling’s preparation time.
2. Parts with complex shapes.Such parts have high requirements for machining accuracy and manufacturing accuracy, accurate tool setting, and can be easily compensated for size. General-purpose machine tools cannot be processed, or it isn’t easy to ensure the processing quality.
3. Parts with small surface roughness values. The surface roughness depends on the cutting speed and feed rate with a given workpiece and tool material, finishing allowance, and tool angle. Ordinary machine tools have a constant speed, and the cutting speed is different with different diameters. For example, a CNC lathe has a continuous line speed cutting function. The same line speed can be used for the end face and outer circle of different diameters to ensure that the surface roughness value is small and consistent. When machining surfaces with different surface roughness, a low feed rate is selected for the surface with minor roughness, and a more significant feed rate is chosen for the character with large roughness. The variability is excellent and challenging to achieve in standard machine tools.
4. Parts with complex contour shapes. A straight line or circular arc can approximate any plane curve. The CNC machine tool has the function of circular interpolation, which can process parts with various complex contours.
5. Shell or box-shaped parts with an unopened inner cavity are difficult to measure, difficult to control feed, and challenging to control size.
6. Multi-process parts such as milling, boring, countersinking, reaming, or tapping must be completed in one clamping.
7. Expensive, essential parts that are not allowed to be scrapped during processing.
8. Urgently needed parts that require the shortest production cycle.
9. High value parts. Parts that are easily disturbed by human factors (such as emotional fluctuations, physical strength, technical level, etc.) during general machine tool processing, and will cause significant economic losses once the quality is out of control.