Method for checking strength of casting mould locking structure of vertical centrifugal casting machine

Abstract

The invention belongs to the field of centrifugal casting technique and particularly relates to a method for checking strength of a casting mould locking structure of a vertical centrifugal casting machine. The method comprises the following steps: firstly, checking the strength of a locking bolt of the locking structure, i.e., checking the strength of the locking bolt under the condition that a casting mould is not broken and further checking the strength of the locking bolt under the condition that the casting mould is broken, wherein the checking of the strength of the locking bolt under the condition of the broken casting mould comprises strength checking under two abnormal conditions that the locking bolt is impacted or sheared by casting mould fragments and the locking bolt is eroded by high-temperature molten metal; and secondly, checking the strength of a pressure plate of the locking structure, wherein the checking of the strength of the pressure plate comprises checking the shearing strength of the pressure plate from a cushion cover and checking the upward bending stress of the pressure plate from a cover plate. The accident of top showering of the high-temperature molten metal resulting from the high-temperature failure of a component of the locking structure can be effectively avoided and the safety in the pouring process is enhanced greatly.

Description

technical field [0001] The invention belongs to the technical field of centrifugal casting, and in particular relates to a method for checking the strength of a mold locking structure of a vertical centrifugal casting machine. Background technique [0002] The metal cylinder sleeve and cover plate of the mold designed by the traditional method, as well as the locking method of the mold and the centrifuge chassis are locked by the screws or bolts of the mold itself. After the high-temperature metal liquid is poured into the mold, the temperature of the mold The rapid rise, the screw is in a high temperature working state, and the mechanical properties are greatly affected. When the screw fails due to high temperature, the cover plate is lifted, resulting in a top spray accident of high temperature molten metal, causing great loss of personnel and property; , the Chinese invention patent application whose patent application number is 201210256878.2 discloses a mold and mold lo...

AI Technical Summary

Problems solved by technology

The locking device designed by the traditional method only checks the strength of the screws and bolts installed in the mold itself, not the mold and mold locking structure of the vertical centrifugal casting machine as described in the patent No. 201210256878.2 The strength of the locking bolt and the pressure plate located outside the casting mold is checked; the traditional checking method only uses the yield strength of the damaged part under high temperature as the basis for checking the strength, and the traditional checking method only checks the strength after a safety accident occurs. Damaged parts are identified after the event, and the occurrence of top injection accidents cannot be prevented

Images