If the sand mold casting process is unreasonable, the local hot spots of the casting shell will increase. In order to ensure the compactness of the internal structure of the casting and effectively prevent sand casting defects such as looseness and shrinkage cavity in the thick parts of the...
Rocker arm shell is one of the important parts of shearer. The rocker arm shell of the shearer is a large box type steel casting, the structural shape is shown in the figure, and the outline dimension is 4130 mm × 1 924 mm × 1050mm, with main wall...
The development of sand casting process simulation technology is closely related to the development of computer technology. Since 1962, scientists first calculated the heat transfer of sand casting solidification process based on digital computer and finite difference method, all kinds of commercial simulation software of sand casting have played...
The prediction of shrinkage defects in sand castings during solidification is mainly realized by using shrinkage defect criterion. Shrinkage porosity defects are generally related to the speed of solidification process, the size of section and alloy composition. When the shrinkage rate of each element is divided by the critical...
According to the above casting defect analysis and countermeasures, a new process diagram is finally formed, as shown in Figure 1. In order to verify the rationality of the new process of steel castings, after drawing the three-dimensional diagram, the solidification simulation was carried out by Huazhu CAE. Figure...
(1) The section diagram corresponding to the casting defect I is shown in Figure 1. The casting defect I occurs in the local thick area in the figure. The wall thickness of large area is 26mm, and the wall thickness of adjacent K area is 14mm. In the original...
1.Mold making and trial production According to the designed process drawing and tooling drawing, the die quotation is carried out. Finally, the mold is manufactured by the outsourcing mold manufacturer. The product mould is shown in Figure 1. The enterprise model technicians checked the mould made by external cooperation...
Draw the process drawing of sand casting according to the processing quantity and riser calculated before. Refer to attached Fig. 1 for the process diagram of sand casting. The gating system of sand mold casting is the channel to introduce liquid metal into the mold cavity. The successful pouring...
The effect of checking the riser mainly includes the check of feeding range and feeding weight. One method to calculate the feeding distance in the horizontal direction of the riser is the riser continuity method. Riser continuity refers to the ratio of the sum of riser root dimensions to...
1. Problem description Sand casting bracket steel casting, steel casting No. 20e-70-k1432. The steel casting is a new external product of ZHY casting. In the trial production stage of steel casting, the radiographic inspection of the steel casting is unqualified. The effect is not ideal by adjusting the size...