Casting and Forming Technology of Thin-walled Cylindrical Parts Based on Sand Mould 3D Printing Technology
In recent years,a significant advancements are made in sand mould 3D printing technology.The utilization of organic binders and inorganic resin combined with self-hardening technology for making sand mould reaches a mature stage,which can be used in the casting industry.This solves the problems of low production efficiency and complex process design in traditional casting methods.Differential pressure casting can produce high quality casting with excellent performance.When combined with 3D printing technology,the complex and precise casting forming parts can be obtained quickly.In this paper,by combining 3D sand mould precision printing technology with differential pressure casting forming technology,ZAlSi7MgA cast aluminum alloy material was used to trial-produce thin-walled cylindrical structure parts with complex inner cavity structure.The results show that the performance of the cast product test samples is far better than the requirements of the national standard,in which the average tensile strength reaches 348 MPa,increased by 18%,the average elongation rate after breaking is 5.5%,increased by 83%,and the internal quality of the product reaches the level of class I casting;after size scanning analysis,the tolerance range of the single side dimensions of the product's inner cavity is-0.0976-+0.1089 mm,meeting the design index of±0.3 mm,achieving differential pressure precision casting forming of thin-walled complex cylindrical structural parts.
sand mould 3D printingdifferential pressure castingprecision forming
万方数据
维普
