This link should focus on the inspection of personnel skills and experience. The operator’s work certificate can be checked. At the same time, the actual skills can be understood through inspection and communication. It is also recommended that the sand casting factory arrange personnel with high professional skills and rich experience to this project.
The main reason for taking this inspection measure is that there are many hidden work in the box distribution link, and there are few macro measurement methods, which are more dependent on personnel experience and responsibility. The second is to strengthen process inspection, mainly to inspect the implementation of sand mold casting process discipline and box allocation, as shown in the figure.
The process execution shall be checked according to the sand casting process documents, and the placement of some scale cores shall also be spot checked. Special attention should be paid to environmental factors. According to the sand casting process documents, the box matching process should be completed within 14 days. If the work is carried out in wet weather, the moisture in the distribution box is large due to the high air humidity.
Although drying will be carried out after the completion of the distribution, considering the complexity of the internal cavity and the singularity of the detection method, there is a risk that the drying is not complete. Therefore, it is not recommended to carry out the box distribution operation in wet weather. At this time, the sand casting factory should be timely reminded.
Safety supervision should be the first step in the supervision of this link. The reasons are as follows: 1) the molten iron smelting temperature is high; 2) In the process, the crane is used for lifting, and there are many dangerous factors. In order to ensure that the process is controllable during the supervision of this process, intervention shall be carried out in advance to check the preparation of the factory. Communicate with the sand casting factory in time to understand and check the drying conditions of molten iron ladle, thermocouple and ladle to verify the preparation. In the process of sand casting, it is necessary to check the results of melting sample preparation and chemical composition test. Finally, check the relevant parameters according to the sand casting process documents, such as molten iron temperature, sand casting pouring time, etc., to ensure that these parameters fully meet the requirements of the sand casting process documents.