About Precision Castings Product Accuracy Standard

- May 07, 2018-

The allowable deviation in size and weight and the machining allowance of the casting are determined according to the standards of GB6414-86GB/T11351-89GB/T11350-89 and the technical conditions of the order respectively, and the actual deviation is determined by the data of the technical inspection department. The so-called casting size control is based on the fact that the average value of the actual measurement and the nominal size of the casting are in conformity with the dispersion of the actual measured value. The reason for this discrepancy is usually caused by random changes or systematic errors such as production technology conditions and raw material characteristics. Precision castings should be judged based on the nature of the error and corresponding countermeasures to improve the dimensional accuracy to meet the requirements of the standard.