Vertical machining center accuracy directly impacts product quality. When many people question machine tool accuracy, it can directly influence the buyer's decision. It's important to note that machining accuracy and machine tool accuracy are two different concepts. Using the position accuracy from the manufacturer's sample or product certificate as the machine tool's processing accuracy is incorrect. The position accuracy stated on the sample or certificate is the machine tool's inherent accuracy, whereas processing accuracy is the total error sum produced by various factors of the entire process system, including the machine tool's allowable error. When selecting models, refer to the evaluation method of process capability kp as the basis for accuracy selection. Generally speaking, the calculated result should be greater than 1.33.
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