Considering the influence of turbine blade investment casting process accuracy, the objective fact that the real shape of Aeroengine Blades deviates from the design shape and has an uncertain impact on blade performance has attracted the attention of industry and academia in the last century. In order to improve...
1. Manufacturing process All the technologies described above have different advantages. In this study, selective laser sintering technology is mainly used for investment casting of agricultural machinery engine impeller. Firstly, the selective laser sintering system needs to receive the CAD model of the agricultural machinery engine impeller and select...
In the process of industrial manufacturing, investment casting can play an important role and can be used to make parts with complex shapes. The combination of additive manufacturing technology and investment casting process and their application in agricultural machinery production can give full play to the advantages of the...
In the process of sand casting, the performance of sand mold is one of the key factors affecting the final quality of sand casting. The size and surface quality of the casting sand mold will be directly reflected in the size and surface quality of the final sand mold...
After analyzing the defects, another improvement scheme is made, as shown in the figure. In the original scheme, the investment mold steel castings are inverted, the gating system is placed in the middle of the investment mold steel castings, and most of the investment mold steel castings are located...
Unreasonable pouring speed setting of investment casting will also produce insufficient pouring defects. In order to determine the reasonable pouring speed, according to the principle of control variable method, a variety of pouring speed analysis schemes are set for 1560 ℃ and 1600 ℃ pouring temperatures respectively. The momentum...
Another investment casting thin-walled steel casting of ZHY casting was under poured in the trial production process, and the defects were more than 90% and concentrated. The product structure is shown in Figure 1a, and the process scheme is shown in Figure 1b. The insufficient pouring defects are mainly...
In the casting defect scheme, the actual pouring temperature is 1560 ℃, and the actual average pouring speed is 0.38 M / S. in order to determine the reasonable range of pouring temperature corresponding to the actual average pouring speed (without cold lap casting defects), according to the principle...
The support size of a thin-walled steel casting is 400 mm × 310 mm × 270 mm, minimum wall thickness 4 mm, average wall thickness 5 mm, material zgd410-700. The product structure and casting process scheme are shown in Figure 1. According to this process scheme, more than 40%...
Because the exhaust rib is not set in the original scheme, the simulation shows that the gas pressure in the mold shell of the investment casting steel is close to 45 bar before being filled. Therefore, one of the reasons for the insufficient pouring defect of the investment casting...