Method for digitally and quickly detecting and analyzing sand core

Abstract

The invention discloses a method for digitally and quickly detecting and analyzing a sand core. A scanner is used for scanning a mold to obtain scanning point cloud; the mold scanning point cloud performs processing and mold closing; the cavity point cloud is extracted, the cavity point cloud and a process 3D model are input, the tolerance color scale map is set, and the curved surface comparisonis performed; the mold testing and the evaluation method can intuitively analyze whether the cavity is consistent with the process model or not, so that the problem that the mold lacks a shape surfacein the machining process is solved. According to the method, the problems of misalignment of the sand core and burrs of the sand core can be quickly and directly analyzed, so that the quality of thesand core is improved, the requirement of avoiding burr trimming is met, and the productivity is improved. And meanwhile, as long as the comparison result is consistent with the process 3D model, theproblems of core assembly interference and interference with a tool and other auxiliary tools in core shooting and core assembly can be avoided, so that the phenomena of core assembly and sand core scraping and changing are rapidly and accurately solved. According to the method, the cost can be reduced, and qualified castings can be cast at a time.

Description

technical field [0001] The invention relates to the field of casting, in particular to a digital rapid detection and analysis method for sand cores. Background technique [0002] Sand core, also known as "mud core". It is a kind of sand mold component, which is combined with sand core components in casting, and then the mold is closed, poured, cleaned, and finally the finished casting blank is obtained by coating. Sand cores for casting are usually obtained through mold injection. When designing and manufacturing the mold, in order to ensure that the cavity of the mold is consistent with the shape of the three-dimensional model of the sand core designed by the casting process: the mold must go through mold blank casting, mold programming processing, combined assembly, and finally the mold is qualified for factory test. [0003] At present, domestic mold manufacturers often use vernier cards, three-coordinates, joint arms and other detection methods when the mold is complet...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a digital method for quickly detecting and analyzing sand cores for the difficult problem that the rear ends of the upper and lower thrust pads of the existing engine are not on the same plane, and the assembly precision of the crankshaft and the thrust pads is high.

Images