What is CNC? What are the applications of CNC? What are its drawbacks?
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2022-03-31
What is CNC? What are the applications of CNC? What are its drawbacks?
CNC is the abbreviation for computer numerical control. Literally, it refers to computer-based digital control—a machining technology that is now widely used in manufacturing and has become a hallmark of the industry. With CNC, multi-axis simultaneous motion can be easily achieved: this means that multiple coordinate axes on a single machine tool—both linear and rotary—can perform machining operations at the same time, coordinated and synchronized under the control of a CNC system. For example, machining complex curved surfaces would be virtually impossible using conventional machine tools alone; CNC makes such tasks feasible.
1. Significantly reduce the number of tooling fixtures; machining parts with complex geometries does not require elaborate tooling. If the part’s geometry or dimensions need to be changed, simply modify the machining program, making this approach well-suited for new product development and design modifications.
2. Stable machining quality, high machining accuracy, and high repeat accuracy, meeting the processing requirements for particularly precise parts.
3. Under conditions of diversified product types and small-batch production, manufacturing efficiency is high, as it reduces the time required for production preparation, machine tool setup, and process inspection (process inspection refers to the examination conducted on products processed at each operation and on the key process parameters that affect product quality, in order to prevent nonconforming items from passing to the next operation). Moreover, thanks to the use of optimal cutting parameters, the amount of material removed per pass is reduced, thereby shortening cutting time.
4. Among traditional machining practices, the most challenging task is undoubtedly the machining of complex, free-form surfaces; however, CNC machining can readily accomplish this—and can even machine areas that are otherwise inaccessible or invisible.
5. Comparison:
Conventional milling machines have low batch production efficiency, and the machining quality is heavily influenced by the operator’s skill level, resulting in significant variability and poor process consistency.
CNC machining offers high production efficiency, excellent process consistency, stable quality, a high degree of automation, and low production costs.
6. Finally, it should be noted that CNC machine tools are expensive; when the batch size is small, the time required for programming outweighs the benefits, making it economically inefficient. Therefore, programmers must possess a high level of expertise.
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2022/03/31
2022/03/31
2022/03/31
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