Accurate temperature measurement method for sand casting based on temperature measurement unit positioning

Abstract

The invention discloses a temperature measurement method for sand casting based on temperature measurement unit positioning. The method comprises steps of (1) manufacturing a temperature measurement unit by using a limiting block, a thermal couple and modeling sand, wherein (1-1), the limiting block comprises a positioning groove, the thermal couple is inserted into the positioning groove, modeling sand is used for filling and shaping on the outer surface of the limiting block, so as to form a sand block on the outer surface of the limiting block, the modeling sand is hardened, so as to obtaina temperature measurement unit precursor, (1-2), the limiting block is extracted out of the temperature measurement unit precursor, the position of the previous limiting block is filled with modelingsand, so as to form a temperature measurement side, the modeling sand is hardened, so as to obtain a temperature measurement unit; (2) making a casting mold by using the temperature measurement unitand the modeling sand; and (3) performing sand casting by using the casting mold, and measuring temperature of a to-be-measured temperature interface by using the thermal couple during sand casting. In the method, the temperature measurement unit is made by virtue of the limiting block and the sand block, the temperature measurement thermal couple in modeling sand can be positioned accurately, sothat temperature field change can be measured accurately in sand casting.

Description

technical field [0001] The invention relates to the field of sand casting technology, in particular, the invention relates to a precise temperature measurement method for sand casting based on the positioning of a temperature measuring unit. Background technique [0002] During the casting process, the high-temperature molten metal fills the mold cavity and gradually solidifies under the cooling of the mold to form practical parts. Castings may form various defects such as shrinkage cavity, shrinkage porosity, and segregation during solidification, and the generation of these defects largely depends on the heat transfer behavior between the casting and the mold. Determining the heat transfer behavior of the casting-mold interface and obtaining the change law of the interface heat transfer coefficient over time can predict the entire solidification process of the casting, thereby predicting the occurrence of defects, guiding process optimization, and improving casting quality...

AI Technical Summary

Problems solved by technology

However, the existing temperature measurement methods for sand casting still need to be improved

Images