The precision of CNC cutting machine and the machine itself

Rebar Cutting Machine:

The accuracy of the CNC cutting machine is a problem that customers are most worried about when purchasing a CNC cutting machine. In most people think that using CNC equipment can achieve high precision and high efficiency. And, in the same type of equipment, imported, high-end configuration equipment, have higher accuracy and higher production efficiency.
However, a digitally controlled flame or plasma cutting machine is simply not the case. Regardless of numerical control flame cutting or plasma cutting, the cutting width is affected by many factors such as the cutting nozzle. Regardless of the accuracy of the equipment itself, the accuracy of the parts cut by it is generally around ±0.5 mm. The error is several orders of magnitude higher than the device itself. That is, the CNC cutting machine imported with millions of millions of dollars can only be so. This is determined by the flame or plasma cutting process. In any case, the same high machining accuracy as other numerical control equipment such as CNC lathes is not achieved. In other words, whether the accuracy of the device itself is 6 or 8 is not very important.
From the point of view of production efficiency, the speed of cutting is based on flame cutting, for example. It depends entirely on the thickness of the plate, nozzle type, oxygen purity, gas quality and other factors. The moving speed of the equipment should meet and adapt to the cutting process requirements. In other words, the cutting efficiency is not directly related to the equipment itself.
Of course, the CNC cutting machine still embodies quite high precision and high efficiency, but this is relative to the manual blank cutting, and it is not a concept with the improvement of machining precision and efficiency.
From the above analysis, we can see that no matter who makes a CNC cutting machine, there will not be much difference in terms of cutting accuracy and production efficiency. That is to say, the use of small CNCs as small as 10,000 yuan or more compared to the imported millions of CNCs is still the case. The accuracy, roughness, and production efficiency of the processed parts will not be greatly different.
Therefore, due to the limitation of the processing technology, the equipment that can only finish the rough machining, like the machining center and other types of the fine processing equipment, takes the expensive cost to pursue the so-called high-grade configuration that aims to improve the machining accuracy and efficiency. It is unscientific.
Instead of using the most expensive things on the device, the device becomes a high-end device. To measure whether a device is high-end, the evaluation should be based on the reliability and use of the device (the precision, roughness, and production efficiency of the processed part), not the cost of the equipment used on it, and more His price.
For such equipment, under the premise of satisfying the cutting process requirements, the system’s pursuit should focus on:
1. CNC cutting cutting work environment is poor, dust is large, temperature changes, the equipment running vibration, the reliability of the system is the most important thing.
2. Software and hardware performance can well meet the various process requirements for cutting.
3. The graphic input is simple, the on-site operation performance is good, it is in line with China's national conditions, and the on-site operator is easy to operate and maintain.
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