The China Foundry Association hosted the evaluation and promotion meeting of the scientific and technological achievements of “R&D and application of robot fully automatic precision casting shell production line” completed by AVIC Engineering Integration Equipment Co., Ltd. in Zhenjiang New District, Jiangsu Province. In order to continuously improve the...
During casting production, the causes of oxidation slag inclusion defects are: ① The oxide slag on the liquid surface is not cleaned during molten iron smelting; ② The slag attached to the inner wall of the ladle is re melted into the casting due to the uncleanness of the...
For defects visible to the naked eye on the casting surface and the parts with defects found during flaw detection, 10mm shall be made by wire cutting × 10 mm × 10 mm test piece. Then, ultrasonic cleaning of the sample with acetone and absolute ethanol for 2-3 times,...
A company used the wet casting method to produce a certain type of automobile shell castings, which are made of GX40CrNiSi25-20 (German standard is 1.4848, national standard is 2520 stainless steel). The casting defect rate in the production process is as high as 20%. In order to reduce the...
1. Design of turbine casing pouring system The internal and external contours of turbine shell parts are relatively complex. When designing the casting system, factors such as the casting and exhaust of the outer mold and sand core should be considered, and factors such as sprue, runner, ingate, riser...
1. The traditional sand casting method has low precision and cannot meet the production of complex parts such as turbine shell Turbine shell parts are often used in the assembly of precision equipment such as engines and superchargers, and have high precision requirements on the inlet and outlet ports,...
1. White mold making Due to the large size of the vacuum pump shell casting, the white mold of the vacuum pump shell casting cannot be made completely at one time, and the white mold can only be made by splicing. First, the vacuum pump shell casting is divided...
In order to verify whether the top pouring process is reasonable, whether the molten iron mold filling can ensure the smooth pouring, and ensure that the pouring system can effectively feed the shrinkage position of the vacuum pump shell casting, the mold filling and solidification process of the pouring...
The chemical composition of molten iron is shown in Table 1. The double wire feeding spheroidization process with cover is adopted, the addition amount of fesimg25re3 spheroidizing agent is 0.7%, and the method of compound inoculation with 0.3% pretreatment agent and 0.2% 75fesi is adopted for inoculation in the...
The shell of the water ring vacuum pump used by ZHY Casting is welded with steel plates and processed into shape. It is washed by water and sand for a long time in the process of use. The shell of the water ring vacuum pump leaks, causing the low...