According to the sand mold casting process CAD system developed by the laboratory, the casting process design is carried out. It is developed by using Pro / E as the platform, VC + + 2005, Microsoft Access2003 and function library Pro / Toolkit as tools, and using key technologies such as interface, ADO, menu, parametric design and size drive to develop functional modules. Its sand casting process design flow chart. Rapid sand casting includes: sand casting process analysis, parting surface setting, material addition, sand core design, gating system design, riser design, exhaust system design, machining allowance, sand casting scale and other casting process parameter design.
Sand casting engine cylinder head belongs to medium-sized box parts. Box parts are usually used as reference parts for the assembly of other parts of the box. It can assemble some shafts, gears and bearings to ensure their correct mutual position and dimensional relationship. Its main structure is surrounded by uniform thin-wall cavities with different shapes. Generally, there are many holes on the cavity wall to achieve the function of accommodation and support. At the same time, it has the structures of reinforcing ribs, bosses, pits, sand casting fillet, draft angle and so on.
Secondly, the internal structure of sand casting engine cylinder head is complex, and its structural and dimensional accuracy is closely related to the assembly and use of other components, so its part structure and dimensional accuracy directly affect the overall performance of the engine. The product must ensure the size and position accuracy of its 8 air inlets and 4 air outlets. Therefore, accurate sand core design and sand core positioning are required to ensure the position and overall wall thickness of air inlets and air outlets.