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What is smart precision of the rapid sample

by:Bofeng     2020-10-31
What is a quick sample of smart accuracy

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fast sample smart precision is the actual size of processed parts surface, shape, position and degree of the ideal geometrical parameters of drawing request!

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ideal geometric parameters, for size, average size, for shape, namely absolute round, cylindrical, flat, cone and lines, etc.

for each position, which is absolutely parallel, perpendicular, coaxial, symmetry, etc.

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1, dimensional accuracy

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smart parts after the actual size and the size of the consistent degree of tolerance zone center.

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2, shape accuracy

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refers to the think tank made after the actual shape of the workpiece surface consistent with the geometry of the ideal.

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3, the location accuracy

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after refers to the smart parts about the difference between the actual location of the precision surface.

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4, the relationship between the

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usually in rapid prototype machine design part and regulation precision parts processing, should pay attention to control the shape error position within the tolerance, position tolerance and should be less than the size tolerance. Also is the important surface precision components or parts, the shape accuracy requirements shall be higher than the location accuracy, position accuracy requirement should be higher than the dimension accuracy requirement.

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parts actual geometric parameters and the ideal geometrical parameters deviation value is called machining error. The size of the machining error reflects the machining precision of high and low. The smaller error processing accuracy is lower, the greater the processing precision is higher.

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, a quick sample processing precision profile

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machining accuracy is mainly used in the production of products, machining precision and machining error are evaluating surface geometric parameters of the term. The machining accuracy as measured by the tolerance grade level value is smaller, its precision is higher; Expressed in numerical processing error, the error is bigger. Machining precision is high, is the processing error is small, and vice versa.

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tolerance grade from IT01 IT0, IT1, IT2, IT3 IT18 a total of 20, one of the highest IT01 said the parts machining precision, IT18 said the parts processing precision is the lowest, generally IT7, IT8 is the machining accuracy of medium level.

any processing method of actual parameters are not absolutely accurate, look from the function of the parts, as long as the machining error on the part drawing requirements, within the limits of tolerance that reached the machining accuracy.

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fast sample accuracy and precision difference:

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1, the fast sample accuracy

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refers to the proximity between the measurement results and the real value. High measurement accuracy, is refers to the system error is small, the average deviation of measurement data true value is less, but scattered data, namely the size of the random error is not clear.

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2, rapid sample precision

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refers to the repeated sample is using the same alternate between the result of the reproducibility and consistency. Possible precision is high, but the precision is not accurate. For example, use 1 mm length were determined to get the results of three 1 respectively. 051mm,1. 053mm,1. 052 mm, although their precision is high, but it is not accurate.

fast sample accuracy said the correctness of the measurement result, rapid sample precision said the repeatability and reproducibility of the test results, rapid sample precision is the premise condition of rapid sample accuracy.


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