In view of the reasons for the formation of pores in the cylinder head inner cavity, the sand casting process was improved: ① The melt composite treatment process is adopted. At the same time of argon rotary injection, the refining and modification primary treatment agent is added. After the...
The cast was dissected and flaw detected, and no shrinkage porosity, shrinkage and other casting defects were found. However, a large number of pores were found on the air duct wall and the side wall of the cooling water channel. According to ASTM E-155 standard, it was determined that...
The cooling channel and inlet/outlet of the cylinder head are of special-shaped curved structure, with large wall thickness variation and numerous corners and distortion areas. The air passage is not connected with the upper and lower water channels, and the thinnest part is 3 mm. The relationship between the...
According to the structure and working conditions of the cylinder head of the combat vehicle diesel engine, taking into account the production efficiency and yield of the sand casting, the anti-gravity sand casting process is selected to ensure the internal quality and mechanical properties of the cylinder head casting....
1. Determination of casting process plan for BOP shell According to the solidification simulation analysis of the product digital model, combined with the structure of the BOP shell casting, considering the core and forming problems, the casting process plan of the BOP shell casting with the rectangular cavity downward...
1. Design of cold core box of diesel engine cylinder head All the molds of the cold core box of the diesel engine cylinder head are designed in 3D, programmed by computer, and processed by the machining center network. The working surface, parting surface and the matching surface of...
The trial production of A804T0-1009006 nodular cast iron oil pan castings by top-pouring and inclined pouring process was carried out. The appearance and dimension of the castings were good after sanding, and there were no cavity defects on the surface of the inner cavity, as shown in Figure 1....
In order to verify whether the pouring process of A804T0-1009006 oil pan top-pouring inclined lost foam casting is reasonable, whether the molten iron filling can ensure smooth pouring, and whether the transverse runner can be used as a feeding riser to feed the thick hot spot at the top,...
In order to ensure the quality of ductile iron castings, it is required to strictly control the mold assembly, dip coating and pouring links in the new process commissioning stage, and strictly track and guide the process indicators such as the size of the pouring system used for mold...
1. Overview of parts of four-way elbow valve box The silicon brass four-way elbow valve box is a ten-way structure, and the part size diagram is shown in Figure 1. After placing 4 mm machining allowance on the machining surface, the length is 846 mm, the width is 328...