1. The dimensional accuracy of the Household Product Mould(FURNITUREMOULD) https://www.furnituremould.com/product/daily-necessities-mould/
refers to the degree of conformity between the actual size of the machined part and the tolerance zone centre of the part size.
Dimensional accuracy is controlled by dimensional tolerance. Dimensional tolerance is the allowable variation of part size in domestic product mould processing. Under the same basic size, the smaller the tolerance and the smaller the size, the higher the dimensional accuracy.
2. The shape accuracy of the household product mould refers to the degree to which the actual geometric shape of the machined part surface conforms to the ideal geometric shape.
The items for evaluating the shape accuracy include straightness, flatness, roundness, cylindricity, line profile, etc. Shape accuracy is controlled by shape tolerance. All shape tolerances are equally divided into 12 accuracy classes except roundness and cylindricity. Level 1 is the highest and level 12 is the lowest.
3. The positional accuracy of the household product mould refers to the difference in actual positional accuracy between the relevant surfaces of the processed parts.
The items for evaluating the position accuracy include parallelism, verticality, inclination, coaxial, symmetry, position, circular runout and full runout. Position accuracy is controlled by position tolerance, and the position tolerance of each item is also divided into 12 precision grades.
4. The relationship between dimensional accuracy, shape accuracy and position accuracy of domestic product moulds.
Generally, when designing machine parts and specifying the machining accuracy of parts, attention should be paid to controlling the shape error within the position tolerance, and the position error should be smaller than the size tolerance. That is, the shape accuracy requirement of precision parts or important surfaces of parts should be higher than the position accuracy requirement, and the position accuracy requirement should be higher than the size accuracy requirement.
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