Tolerance optimization method for die forging

Abstract

The invention belongs to the field of aviation machinery, and particularly relates to a tolerance optimization method for a die forging. The tolerance optimization method comprises the following steps of: determining the type of tolerance of a die forging of a part to be optimized according to a drawing of the part, dividing into interior tolerance and exterior tolerance, and then obtaining tolerance data. According to the tolerance optimization method, dimensional tolerance optimization is performed on the die forging of a certain series of a certain airplane, and the requirements of numerical control machining and the technical requirements of part design and manufacturing can be met by rationally adjusting the tolerance of the part and the die forging, so that the machining accuracy, the production efficiency and the yield of products are improved, the machining technical difficulty is reduced, and the method has wide applicability and is convenient to implement. For example, the yield is 80 percent, the production efficiency is 3 pieces per day and the machining accuracy out-of-tolerance use is less than 20 percent before optimization, but the yield reaches over 95 percent, the production efficiency is 5 pieces per day and the machining accuracy out-of-tolerance use can be controlled within 5 percent after optimization; and the equipment and personnel investment is reduced.

Description

technical field [0001] The invention belongs to the field of aviation machinery, and in particular relates to a tolerance optimization method for die forgings. Background technique [0002] During the machining process of a certain type of aircraft die forgings, some dimensions do not meet the tolerance requirements of the parts. The reason is that the machining tolerances of the parts are different from the tolerances of the blanks of the die forgings. It is difficult to determine, and there are many processes required in the processing process, the quality control between processes is complicated, the technical level of personnel is high, the processing cycle is long, the processing technology is unstable, and the large investment in equipment can only meet the requirements of traditional ordinary machine tools. With the increase in the complexity of aircraft structural parts, the difficulty of processing and the continuous updating, the traditional processing technology c...

AI Technical Summary

Problems solved by technology

[0002] During the machining process of a certain type of aircraft die forgings, some dimensions do not meet the tolerance requirements of the parts. The reason is that the machining tolerances of the parts are different from the tolerances of the blanks of the die forgings. It is difficult to determine, and there are many processes required in the processing process, the quality control between processes is complicated, the technical level of personnel is high, the processing cycle is long, the processing technology is unstable, and the large investment in equipment can only meet the requirements of traditional ordinary machine tools. With the increase in the complexity of aircraft structural parts, the difficulty of processing and the continuous update, the traditional processing technology can no longer meet the advanced manufacturing technology. Through the reasonable adjustment of the tolerance of the part drawing and rough drawing die forging to meet the use requirements of the parts after processing, It not only meets the technical standard requirements of parts tolerance; at the same time, it can meet the requirements of modern and advanced numerical control processing technology and reduce the difficulty of processing, so as to improve the processing accuracy of products, reduce the mechanical processing procedures, simple technology and quality control,